JP6786341B2 - measuring device - Google Patents

Description

The present invention relates to a measuring device including a plurality of measuring units configured to be capable of measuring a measured quantity in any of a plurality of measuring ranges.

As this type of measuring device, an autorange measuring device (hereinafter, also simply referred to as “measuring device”) is disclosed in the following patent documents. In this case, in the measuring device disclosed as the "conventional technique" in this patent document, the measurement is started in a state of being switched to the minimum range among the plurality of measuring ranges, and the measurement is performed in the optimum measuring range. Up to this point, a configuration has been adopted in which the measurement range is automatically switched to a larger range according to the measured value.

On the other hand, in the measuring device disclosed as "Example" in this patent document, measurement is started in a state of being switched to the maximum range among a plurality of measurement ranges, and the measured value and range range obtained in the maximum range are obtained. A configuration is adopted in which the optimum measurement range is automatically identified by comparison with the data. As a result, the measurement result in the optimum measurement range can be obtained without switching the range a plurality of times, so that the measurement process can be completed in a shorter time than the measuring device disclosed as the above-mentioned "conventional technique". It is possible.

Japanese Unexamined Patent Publication No. 3-165123 (pages 1-4, 1-5)

However, the configuration of the measuring device disclosed in the above patent document has the following problems to be improved. Specifically, the measuring device disclosed in the "conventional technique" in the above patent document adopts a configuration in which the measurement range is sequentially switched from the minimum range to the optimum range according to the measured value, and "Examples" in the above patent document. The measuring device disclosed in "" adopts a configuration in which the optimum measurement range is specified by comparing the measured value measured in the maximum range with the range data. As a result, in any of the measuring devices, the user does not have to specify the optimum measuring range based on the measured value and manually switch the measuring device, so even a person who is unfamiliar with the operation of this type of measuring device can measure. It is possible to carry out the work easily.

On the other hand, the applicant has applied the "conventional technique" in the above patent document to a light amount measuring device capable of performing various measurement processes using red light, green light and blue light emitted from a laser projector or the like as the light to be measured. A device equipped with an autorange function similar to the disclosed measuring device was prototyped. In this case, the light amount measuring device prototyped by the applicant (hereinafter, also referred to as "prototype device") is an optical sensor that outputs a detection signal according to the detection amount of red light, and a detection signal according to the detection amount of green light. It is equipped with an optical sensor that outputs and an optical sensor that outputs a detection signal according to the amount of blue light detected, and based on the detection signal from each optical sensor, it is possible to measure values for each of red light, green light, and blue light. , A configuration is adopted that specifies the measured values for the combined light of red light, green light and blue light.

Further, in this prototype device, a measuring unit that measures the measured amount based on the detection signal for red light (hereinafter, also referred to as “red light measuring unit”) and the measured amount based on the detection signal for green light. The measuring unit that measures (hereinafter, also referred to as "green light measuring unit") and the measuring unit that measures the measured amount based on the detection signal for blue light (hereinafter, also referred to as "blue light measuring unit") are the amount of light. It is equipped with a plurality of measurement ranges, from a measurement range used when the amount of light is low to a measurement range used when the amount of light is high. In this case, each measuring unit of this prototype device specifies the amount of light of each light to be measured incident on the optical sensor by performing a product-sum calculation of the values obtained by sampling the detection signal from the optical sensor at a predetermined cycle. It is configured as follows. Further, each measuring unit is configured so that the optimum measured value can be obtained for each measurement range by the combination of the detection time of the measured light by the optical sensor (the time for calculating the sum of products of the sampled values) and the gain. ..

Therefore, in the above-mentioned prototype device, the time required to output the detection signal (hereinafter, also referred to as “measurement processing time”) is longer as the measurement range for detecting the light to be measured with a smaller amount of light is, and the time to be measured with a larger amount of light is increased. The measurement processing time tends to be shorter as the measurement range for detecting light tends to be shorter. Therefore, in this prototype device, for example, when the hue (chromaticity, etc.) of the combined light of red light, green light, and blue light output from the laser projector is continuously and repeatedly measured, the red light and green light are used. And when the amount of light of any of the blue light is extremely small, there is a problem that the update interval of the tint, which is the measured value, becomes long.

Specifically, as an example, a state in which the amount of red light and blue light is within the normal value range and the amount of green light is significantly below the normal value range due to a malfunction of the laser projector or the like (for example, green light is It is assumed that the color tint measurement process is started in the state where almost no light is emitted. At this time, in the red light measurement unit and the blue light measurement unit, the measurement range is sequentially switched from the measurement range for detecting the light to be measured with a small amount of light by the above-mentioned auto range function, and the optimum measurement range (the amount of light is increased). The measurement process can be executed in the measurement range for detecting a large amount of light to be measured: that is, the measurement range in which the measurement process time is short). However, in the green light measuring unit, the measurement range for detecting the light to be measured with a small amount of light is not switched to the measurement range for detecting the light to be measured with a large amount of light, so that the state in which the measurement processing time is long continues. The Rukoto.

Therefore, the measurement processing time is the longest in the measurement of tint, which can specify the measured value by having all of the detection signal for red light, the detection signal for green light, and the detection signal for blue light. Since it is necessary to detect red light and blue light according to the detection timing of green light, as a result, even though the measurement processing is executed in the measurement range where the measurement processing time is short for red light and blue light. , The measurement cycle of all measuring units will be adjusted to the measurement cycle of green light. As a result, the update interval of the tint, which is the measured value, becomes long. Even if the autorange function in the above prototype device is changed to the same autorange function as the measuring device disclosed in "Examples" in the above patent document, in the above example, all the measuring units Since it is necessary to match the measurement cycle with the measurement cycle of green light, the update interval of the tint, which is the measured value, becomes long.

The present invention has been made in view of the problem to be improved, and a measuring device capable of avoiding a situation in which the execution cycle becomes excessively long when the processing based on the measured values of a plurality of measuring units is repeatedly executed is provided. The main purpose is to provide.

In order to achieve the above object, the measuring device according to claim 1 has a plurality of measuring units for measuring an amount to be measured in any one of N types of measuring ranges (N is a natural number of 2 or more). In addition, the first process of controlling each of the measuring units to measure the measured amount in any of the measuring ranges, and predetermined based on the measured value of the measured amount measured by each measuring unit. Each of the measuring units includes a processing unit that alternately and repeatedly executes the second processing, and each measuring unit has M types of measurement processing time for each measurement range required for measuring the measured amount (M is 2 or more N). is configured to a natural number) the presence of the following, wherein the processing unit in the first processing, the said measurement range in which the to measure the amount measured in the measuring section, wherein the measurement value measured by the measuring section The measurement is performed from the measurement range of the measurement processing time, which is the shortest of the M types of measurement processing time, to the measurement range of the measurement processing time, which is the longest of the M types of measurement processing time. A range determination procedure for determining the measurement range so as to sequentially switch the range, the measurement value measured by each measurement unit, and when the measurement value of what value is output, which measurement range is based whether optimum range to and capable of identifying information and determines in accordance with any of the range determination procedure for determining the measurement range, prior Symbol measurement measured by any of the measuring portion is out of the normal value range when filled with error criteria and are said to measure the amount to be measured by specifying a predefined the measurement range except a constant range measurement of the longest measurement processing time to the one of the measuring unit.

The measurement apparatus according to claim 2, wherein, in the measuring apparatus according to claim 1, wherein the processing unit in the first processing, the measured value of the measured amount by the one of the measuring portion is pre disappear When the Rah judgment standard is satisfied, the measurement range having the shortest measurement processing time is designated as the predetermined measurement range, and one of the measurement units is made to measure the measured amount.

Further, the measuring device according to claim 3 is the measuring device according to claim 1 or 2, wherein the processing unit is a measurement unit of the measured amount measured in a measurement range specified in advance by any of the measuring units. wherein when the measured value satisfies a pre disappeared error criterion, the measurement value is to execute the third process of identifiable informed that meets those diether error criterion.

In the measuring device according to claim 1, each measuring unit is configured to have M types of measurement processing times for each of the N types of measurement ranges required for measuring the amount to be measured, and the processing unit is applied to each measuring unit. the measurement range for measuring the measured quantity and determines according ovens determination procedure, when filled with measured values Gae error criterion of the measurement quantity measured by any of the measuring unit, the M types of measurement processing time A process of designating a predetermined measurement range excluding the measurement range of the longest measurement processing time and causing one of the measurement units to measure the measured amount is executed as the first process.

Therefore, according to the measuring device according to claim 1, a state in which a measured value satisfying the error determination criteria is output from any of the measuring units, that is, a value in which the measured value of the measured object is very small. Therefore, even if the optimum range is determined by the general auto range function, the measurement range can be switched to the measurement range having the longest measurement processing time among the M types of measurement processing times. , Since the measurement range of the measurement unit is not switched to the measurement range of the longest measurement processing time, and the measurement is performed by a predetermined measurement range other than the longest measurement range, it is based on the measurement value of each measurement unit. When the process is repeatedly executed, it is possible to preferably avoid a situation in which the execution cycle becomes excessively long.

According to the measuring device according to the second aspect, when the processing unit satisfies the error determination criterion in the first processing, when the measured value of the measured amount by any of the measuring units satisfies the error determination criterion, among the M types of measurement processing time. By designating the measurement range with the shortest measurement processing time as a predetermined measurement range and having one of the measurement units measure the measured amount, one of the measurement units can satisfy the error judgment criteria. Even if the measurement value is output, the measurement range of the measurement unit is determined to be the measurement range of the shortest measurement processing time and the measurement is executed. Therefore, the processing based on the measurement value of each measurement unit is performed. It is possible to more preferably avoid a situation in which the execution cycle becomes excessively long when the execution is repeated.

According to the measuring device according to the third aspect, when the measured value of the measured amount measured by one of the measuring units in the measurement range predetermined by the processing unit satisfies the error determination criterion, the measured value is set. By executing the third process for identifiablely notifying that the error determination criteria are satisfied, it is possible to make the user surely and easily recognize that some abnormality has occurred in the measurement target or the like.

It is a block diagram which shows the structure of the light amount measuring apparatus 1. It is explanatory drawing for demonstrating the measurement processing time Ta to Td for each measurement range R1 to R8. It is a flowchart of the measurement process 10 executed by the processing unit 6 of a light amount measuring apparatus 1.

Hereinafter, embodiments of the measuring device according to the present invention will be described with reference to the accompanying drawings.

The light amount measuring device 1 shown in FIG. 1 is an example of a “measuring device” and includes a measuring unit 2R, 2G, 2B, an operating unit 3, a display unit 4, a storage unit 5, and a processing unit 6, and is not shown. The amount of red light (red laser light) Lr, green light (green laser light) Lg, and blue light (blue laser light) Lb (hereinafter, also referred to as "laser light L" when these are not distinguished) emitted from It is configured so that it is possible to measure an example of "measured amount"), the wavelength of the center of gravity, and the chromaticity of the combined light Lrgb of each laser light L.

The measurement units 2R, 2G, and 2B (hereinafter, also referred to as "measurement unit 2" when these are not distinguished) are examples of "measurement units", respectively, and are an optical sensor (photoelectric conversion unit) and A / D conversion (not shown). A unit, a product-sum calculation processing unit, and the like are provided, and a measurement process of the amount of light of the laser beam L is executed according to the control of the processing unit 6 as described later. Specifically, the measuring unit 2R measures the amount of red light Lr according to the control signal Sr from the processing unit 6 and outputs the measured value data Dr, and the measuring unit 2G measures the green light according to the control signal Sg from the processing unit 6. The light amount of Lg is measured and the measured value data Dg is output, and the measuring unit 2B measures the light amount of the blue light Lb according to the control signal Sb from the processing unit 6 and outputs the measured value data Db.

Further, each measuring unit 2 includes measurement ranges R1 to R8 shown in FIG. 2 (example of "N = 8 types of measurement ranges": hereinafter, also referred to as "measurement range R" when not distinguished) from the processing unit 6. The amount of light of the laser beam L can be measured in the measurement range R designated by the control signals Sr, Sg, Sb (hereinafter, also referred to as “control signal S” when not distinguished). In this case, each measuring unit 2 in the light amount measuring device 1 of this example samples the detection signal from the optical sensor at a predetermined cycle and calculates the product-sum calculation of the values in the same manner as in the prototype device described above. It is configured to specify the amount of light of the laser beam L incident on the optical sensor.

Further, each measuring unit 2 in the light amount measuring device 1 of this example performs optimum measurement for each measurement range R by combining the detection time of the laser beam L by the optical sensor (the time for calculating the sum of products of the sampled values) and the gain. It is configured to get a value. The measurement unit 2 of this example is configured such that the measurement range R1 functions as the "maximum light intensity use range" and the measurement range R8 functions as the "minimum light intensity use range".

In this case, in each measurement unit 2, the measurement processing time Ta in a state where the "measurement processing time" for each measurement range R required for measuring the amount of light of the laser beam L is switched to any of the measurement ranges R1 to R3. , Measurement processing time Tb in the state of being switched to any of the measurement ranges R4 to R6, measurement processing time Tc in the state of being switched to the measurement range R7, and measurement processing time in the state of being switched to the measurement range R8. There are four types of Td (an example of "M type"). As a result, in the light amount measuring device 1 of this example, the measured value data Dr, Dg, Db (hereinafter, when no distinction is made, “” when each measuring unit 2 is switched to the measuring range R closer to the “maximum light amount used range”. The time required to output (also referred to as "measurement value data D") is short, and the measurement value data D is output when each measurement unit 2 is switched to the measurement range R closer to the "minimum light intensity range". It tends to take a long time to complete.

The operation unit 3 includes an operation switch for inputting measurement conditions and an operation switch (not shown) for instructing measurement start / stop, and outputs an operation signal corresponding to the switch operation to the processing unit 6. To do. The display unit 4 displays various display screens (not shown) such as a measurement condition setting screen and a measurement result display screen under the control of the processing unit 6. The storage unit 5 stores the operation program of the processing unit 6, the above-mentioned measured value data D, and the measurement result data Drgb generated by the processing unit 6 as described later.

The processing unit 6 is an example of the “processing unit” and comprehensively controls the light intensity measuring device 1. Specifically, when the processing unit 6 is instructed to start processing by the switch operation of the operation unit 3, the processing unit 6 starts the measurement processing 10 shown in FIG. 3 and outputs a control signal S to each measurement unit 2. The "first process" for executing the measurement of the amount of light as the "measured amount" in any of the measurement ranges R, and the value of the measured value data D output from each measuring unit 2 ("measured value of the measured amount"). The "second process" of calculating the amount of light, the wavelength of the center of gravity, the chromaticity, etc. based on one example), generating the measurement result data Drgb based on the calculation result, and displaying the measurement result on the display unit 4 is alternately and repeatedly executed. To do.

When measuring the light amount and the wavelength of the center of gravity of the laser light L from the laser projector, the chromaticity of the synthetic light Lrgb, etc. using this light amount measuring device 1, as an example, a screen that projects various images by the laser projector. The light amount measuring device 1 is installed at the position. At this time, the light amount measuring device 1 is installed with the light receiving surface of each measuring unit 2 facing the laser projector so that each laser beam L emitted from the laser projector is irradiated to each measuring unit 2. Next, the power of the laser projector is turned on, and the projection of the image for adjusting the white balance (for example, the uniform white image over the entire projection area) is started.

In this state, when the start of measurement is instructed by the operation of the operation switch of the operation unit 3, the processing unit 6 starts the measurement process 10 shown in FIG. In this measurement process 10, the processes of steps 11, 12, 14 to 16, 18 described later correspond to the "first process", the processes of steps 13 and 17 correspond to the "second process", and the steps The processes 19 and 20 correspond to the "third process".

Specifically, the processing unit 6 first determines a measurement range R for executing measurement of the amount of light by each measurement unit 2 according to a predetermined "range determination procedure", and can specify the determined measurement range R. A control signal S is output to each measurement unit 2 (designation of measurement range: step 11). In this case, in the light amount measuring device 1 of this example, the processing unit 6 sequentially switches the measurement range R from the measurement range R1 to the measurement range R8 according to the value of the measurement value data D from each measurement unit 2. The procedure for determining the measurement range R for each measurement unit 2 is configured to execute the process of step 11 above as a normal (normal state) "range determination procedure". Therefore, the processing unit 6 first determines the measurement range R of each measurement unit 2 to be the measurement range R1, and outputs the control signal S to each measurement unit 2. In response to this, each measuring unit 2 executes the measurement of the amount of light in the measuring range R1 and outputs the measured value data D indicating the measured value.

On the other hand, when the measurement value data D is output from each measurement unit 2 (step 12), the processing unit 6 generates measurement result data Drgb based on each measurement value data D and of each measurement value data D. When it is determined that the value is the value measured in the optimum measurement range R, the value of the generated measurement result data Drgb is displayed on the display unit 4 (step 13). Specifically, the processing unit 6 first specifies the amount of red light Lr and the wavelength of the center of gravity based on the measured value data Dr, and then specifies the amount of light and the wavelength of the center of gravity of the green light Lg based on the measured value data Dg. The amount of blue light Lb and the wavelength of the center of gravity are specified based on the measured value data Db, and the chromaticity of the synthetic light Lrgb is specified based on each measured value data D to generate the measurement result data Drgb, and the generated measurement is performed. The result data Drgb is stored in the storage unit 5.

Further, when the processing unit 6 determines whether or not the value of each measurement value data D is a value measured in the optimum measurement range R, and determines that the value is a value measured in the optimum measurement range R, the processing unit 6 determines. , Each value of the measurement result data Drgb is displayed on the display unit 4 as the measurement result. At this time, in this example, as an example, it is assumed that each laser beam L has an amount of light suitable for measurement in the measurement range R4. Therefore, the control unit 6 determines that the value of each measured value data D measured in the measurement range R1 is not the value measured in the optimum measurement range R, and moves to the next step without displaying the measurement result. Transition.

Specifically, the processing unit 6 determines whether or not any of the measured value data Dr, Dg, and Db output from each measuring unit 2 satisfies the predetermined "error determination standard". (Step 14). In this case, in the light amount measuring device 1 of this example, as an example, when the laser projector is operating normally, red light Lr, green light Lg, and blue light emitted from the red laser, the green laser, and the blue laser, respectively. A configuration is adopted in which the range of the light amount of Lb is set to the "normal value range", and when the light amount of the laser light L is out of this "normal value range", it is determined that the "error determination criterion" is satisfied.

Therefore, for example, when all of the laser beams L emitted from the laser projector have a light amount within the "normal value range" (all of the red laser, the green laser, and the blue laser make the laser beam L normal or almost normal). (When emitting), the processing unit 6 determines that the "error determination criterion" is not satisfied, and returns to the above step 11. At this time, since each laser beam L has a light amount suitable for measurement in the measurement range R4 as described above, the control unit 6 controls each measurement value data D by measurement in the measurement range R1 of each measurement unit 2. Although the measurement result data Drgb is generated in the above-mentioned step 13, it is determined that the value of each measurement value data D is not the amount of light suitable for the measurement in the measurement range R1. Therefore, when the processing unit 6 executes the process of the second step 11, the measurement range R of each measurement unit 2 is determined to be the measurement range R2, and the measurement unit 2 is controlled so as to be able to specify that fact. The signal S is output.

In response to this, the measurement value data D indicating the measurement result in the measurement range R2 is output from each measurement unit 2 (step 12), and the processing unit 6 executes the generation of the measurement result data Drgb (step 13). ), It is determined that none of the measured value data D satisfies the "error determination criterion" (step 14). After that, until each measurement unit 2 executes the measurement in the measurement range R4 and generates the measurement result data Drgb indicating the measurement result in the optimum measurement range R4, the above steps 11 to 14 are performed. The process is executed repeatedly.

Further, when the measurement result data Drgb indicating the measurement result in the measurement range R4 is generated, the value of each measurement value data D is the value measured in the optimum measurement range R (in this example, the measurement range R4). Therefore, the control unit 6 causes the display unit 4 to display the value of the measurement result data Drgb as the measurement result (step 13). After that, until the end of the process is instructed by the switch operation of the operation unit 3, the measurement in the measurement range R4 by each measurement unit 2, the generation of the measurement result data Drgb showing the measurement result, and the display of the measurement result are repeated. Will be executed. As a result, as long as the light amount of each laser light L does not change, in this example, the light amount of each laser light L, the wavelength of the center of gravity, and the chromaticity of the synthetic light Lrgb are measured in a period equal to the measurement processing time Tb of the measurement range R4. The generation of the measurement result data Drgb and the display of the measurement result are repeatedly executed.

On the other hand, unlike the above example, for example, due to a malfunction of the laser projector or the like, the amount of light of any one of red light Lr, green light Lg and blue light Lb may be out of the "normal value range". is there. As an example, although the red laser and the blue laser are operating normally (for example, laser beams Lr and Lb having a light amount suitable for measurement in the measurement range R4 are output as in the above example), It may be necessary to perform the measurement in a state where the green laser fails and the green light Lg is not emitted.

When the measurement process 10 is started in such a state, the processing unit 6 determines each measurement unit 2 measurement range R as the measurement range R1 in step 11 immediately after the start of the measurement process 10, and determines the amount of light of the laser beam L. Although the measurement is executed, the measurement value data D is output from each measurement unit 2 (step 12), and when the generation of the measurement result data Drgb is completed (step 13), the value of the measurement value data Dg is "error determination criterion". It is determined that (the value is not within the "normal value range") is satisfied (step 14).

At this time, the processing unit 6 sets the measurement range R of the measurement unit 2G that outputs the measurement value data Dg satisfying the “error determination standard” to the measurement range R1 (“the longest measurement processing time of the M types of measurement processing time”. It is determined to be an example of "a measurement range of the shortest measurement processing time of M types of measurement processing time" which is an example of "a predetermined measurement range excluding the measurement range of"), and is within the "normal value range". The measurement range R of the measurement units 2R and 2B that output the measurement value data Dr and Db is determined to be the measurement range R2 according to the "range determination procedure", and the determined measurement range R can be specified. A control signal for each measurement unit 2. Output S (designation of measurement range: step 15). In response to this, the measuring units 2R and 2B execute the measurement of the amount of light in the measuring range R2 and output the measured value data Dr and Db, and the measuring unit 2G executes the measurement of the amount of light in the measuring range R1. The measured value data Dg is output.

Further, the processing unit 6 determines whether or not the measurement value data D is output from each measurement unit 2 (step 16), and when the measurement value data D is output, the measurement result based on each measurement value data D. The generation of the data Drgb and the storage in the storage unit 5 and the determination of whether or not the value of each measured value data D is the value measured in the optimum measurement range R are executed (step 17). At this time, since the value of each measured value data D is not the value measured in the optimum measurement range R, the processing unit 6 does not display the measurement result on the display unit 4, and the measured value data Dr, Dg. It is determined whether or not any of the values of, and Db satisfies the “error determination criterion” (step 18). At this time, for example, when the malfunction of the laser projector is improved and the amount of light of each laser beam L is within the "normal value range", it is determined that none of the measured value data D satisfies the "error determination criterion". The process returns to the process of step 11 described above.

Further, when the state in which the amount of green light Lg is less than the "normal value range" is continued without improving the malfunction of the laser projector, the processing unit 6 performs the measured value data Dg in the above step 18. It is determined that the value of is satisfied with the "error criterion" (not within the "normal value range"). At this time, the processing unit 6 determines whether or not the state satisfying the "error determination criterion" has been continuously performed a predetermined number of times (three times as an example) (step 19). At this time, since the number of consecutive times in which the "error determination criterion" is satisfied is two, it is determined that the specified number of times has not been reached, and the process of step 15 above is executed.

Specifically, the processing unit 6 determines the measurement range R of the measurement unit 2G that outputs the measurement value data Dg that satisfies the "error determination criterion" to the measurement range R1, and the measurement value data within the "normal value range". The measurement range R of the measurement units 2R and 2B that output Dr and Db is determined to be the measurement range R3 according to the "range determination procedure", and a control signal S is output to each measurement unit 2 so as to be able to specify that fact. In response to this, the measuring units 2R and 2B execute the measurement of the light amount in the measuring range R3 and output the measured value data Dr and Db, and the measuring unit 2G executes the measurement of the light amount in the measuring range R1. The measured value data Dg is output.

Further, when the measurement value data D is output from each measurement unit 2 (step 16), the processing unit 6 generates the measurement result data Drgb based on each measurement value data D and stores it in the storage unit 5, respectively. It is determined whether or not the value of the measurement value data D is the value measured in the optimum measurement range R (step 17), and the process proceeds to the next step without displaying the measurement result on the display unit 4. To do. Specifically, the processing unit 6 determines whether or not any of the measured value data Dr, Dg, and Db satisfies the "error determination criterion", and the measured value data Dg output from the measuring unit 2G. It is determined that the value of is satisfying the "error determination criterion" (step 18). Next, the control unit 6 determines whether or not the state satisfying the "error determination criterion" is continuous a predetermined number of times (step 19).

At this time, since the number of consecutive times in which the "error determination criterion" is satisfied has reached the specified number of three times, the processing unit 6 displays the message "Error" on the display unit 4 as an example ("measurement"). An example of "notification that can identify that the value satisfies the error criterion": step 20). As a result, the user recognizes that the measurement process for the green light Lg and the measurement such as the chromaticity that requires the measured value for the green light Lg cannot be normally performed.

Next, the processing unit 6 returns to the above step 15, determines the measurement range R of the measurement unit 2G that outputs the measurement value data Dg satisfying the “error determination criterion” to the measurement range R1, and within the “normal value range”. The measurement range R of the measurement units 2R and 2B that output the measurement value data Dr and Db of the above is determined to be the measurement range R4 according to the "range determination procedure", and the control signal S is sent to each measurement unit 2 so that the fact can be specified. Output. In response to this, the measuring units 2R and 2B execute the measurement of the amount of light in the measuring range R4 and output the measured value data Dr and Db, and the measuring unit 2G executes the measurement of the amount of light in the measuring range R1. The measured value data Dg is output.

Further, when the measurement value data D is output from each measurement unit 2 (step 16), the processing unit 6 generates the measurement result data Drgb based on each measurement value data D and stores it in the storage unit 5, respectively. It is determined whether or not the value of the measured value data D is the value measured in the optimum measurement range R (step 17). In this case, although the value of the measured value data Dg is not the value measured in the optimum measurement range R, the values of the measured value data Dr and Db are in the optimum measurement range R (in this example, the measurement range R4). Since it is a measured value, the control unit 6 causes the display unit 4 to display the measured values for the red light Lr and the blue light Lb among the respective values of the measurement result data Drgb as the measurement results.

Next, the processing unit 6 determines that the value of the measured value data Dg output from the measuring unit 2G satisfies the "error determination criterion" (step 18), and the state of satisfying the "error determination criterion" is continuously specified a specified number of times. It is determined whether or not it has been done (step 19). At this time, since the number of consecutive times in which the "error determination criterion" is satisfied is four times, which is the specified number of times, the processing unit 6 causes the display unit 4 to display the message "Error" again (step 20).

After that, until the end of the process is instructed by the switch operation of the operation unit 3, the measurement in the measurement range R4 by the measurement units 2R and 2B, the measurement in the measurement range R1 by the measurement unit 2G, and the measurement showing the measurement result. The generation of the result data Drgb, the storage in the storage unit 5, the display of the measurement result, and the error display are repeatedly executed. At this time, since the measurement processing time Tb of the measurement range R4 is longer than the measurement processing time Ta of the measurement range R1, the measurement range R is determined in step 15 and the control signal S is output to each measurement unit 2. Occasionally, the measurement unit 2G outputs the measurement value data Dg when the measurement processing time Ta elapses, but the measurement units 2R and 2B output the measurement value data Dr and Db until the measurement processing time Tb elapses. Not done.

Therefore, in the light amount measuring device 1 of this example in which the next measurement by each measuring unit 2 is executed after the generation of the measurement result data Drgb in step 17 is completed, the measurement range is as long as the light amount of each laser light L does not change. In the same period as the measurement processing time Tb of R4, the generation of measurement result data Drgb using the light amount and center of gravity wavelength of each laser beam L and the chromaticity of the synthetic light Lrgb as measurement results, and the display of the measurement results are repeatedly executed. In this case, for the green light Lg whose amount of light satisfies the "error judgment standard", since the measurement is not performed outside the measurement range R1, a highly accurate measurement value cannot be obtained, but the "error judgment standard" is satisfied. At this point, the accuracy of the measured value for green light Lg is not important and is not a major issue.

The operation when the measurement process is performed in a state where almost no green light Lg is emitted due to a malfunction of the laser projector or the like has been described as an example. When measuring the measured amount (light amount, center of gravity wavelength, wavelength width, etc.) for red light Lr with only red light Lr emitted, the measured amount for green light Lg with only green light Lg emitted. When measuring the amount, and when measuring the measured amount for the blue light Lb with only the blue light Lb emitted, the measured amount for each laser light L and the measured amount for the synthetic light Lrgb are measured. Only the amount to be measured for any of the laser beams L can be suitably measured in a measurable state.

In this case, unlike the light amount measuring device 1 of this example, when the value of the measured value data D satisfies the "error determination criterion", the measurement range R of the measuring unit 2 that outputs the measured value data D is measured for the longest time. It does not have a configuration in which a predetermined measurement range R (for example, measurement range R1) other than the measurement range R8 of the processing time Td is set, and the measurement range R of all the measurement units 2 is determined according to the "range determination procedure". In the light amount measuring device of, for example, when only the measured amount of the red light Lr is measured with only the red light Lr emitted, the green light Lg and the blue light Lb are not emitted. Then, the measurement range R of the measurement units 2G and 2B is changed to the measurement range R8.

Therefore, even if the red light Lr to be measured has a light amount suitable for measurement in the measurement range R4, for example, the light amount, the center of gravity wavelength, and the synthesis of each laser light L have the same period as the measurement processing time Td of the measurement range R8. As a result of repeatedly generating the measurement result data Drgb using the chromaticity of the light Lrgb as the measurement result and displaying the measurement result, the update cycle of the measurement result for the red light Lr to be measured becomes very long.

Therefore, when the measurement is performed for only one of the laser beams L by such a light amount measuring device, the measurement cycle (update cycle of the measurement result) is increased due to the influence of the laser beam L that is not emitted. In addition to the measurement mode in which the measured amount for each laser beam L and the measured amount for the synthetic light Lrgb can be measured so as not to be excessively long, the measurement for measuring only the measured amount for the red light Lr. It is necessary to prepare a mode, a measurement mode for measuring only the measured amount for the green light Lg, and a measurement mode for measuring only the measured amount for the blue light Lb. Therefore, the configuration of the light amount measuring device becomes complicated, and the operation of switching to the accurate measurement mode becomes complicated.

On the other hand, in the light amount measuring device 1 of this example, the red light is emitted in a state where only the red light Lr is emitted in a state where the measured amount for each laser light L and the measured amount for the synthetic light Lrgb can be measured. Measurement of measuring units 2G and 2B that measure green light Lg and blue light Lb (laser light L with an amount of light that satisfies the "error determination criteria") that is not emitted when only the measured amount of Lr is to be measured. The range is determined to be the measurement range R1, and that state is maintained.

Therefore, in the light amount measuring device 1 of this example, when the red light Lr to be measured has a light amount suitable for measurement in the measurement range R4, for example, the red light Lr is measured at the measurement processing time Tb of the measurement range R4. The generation of the measurement result data Drgb using the amount of light and the wavelength of the center of gravity as the measurement result and the display of the measurement result are repeatedly executed. Therefore, it is provided with a measurement mode for measuring only the measured amount for red light Lr, a measuring mode for measuring only the measured amount for green light Lg, and a measuring mode for measuring only the measured amount for blue light Lb. Even if it is not, it is possible to sufficiently shorten the update cycle of the measurement result for the red light Lr.

As described above, in the light amount measuring device 1, each measuring unit 2 requires N = 8 types of measurement processing times for each measurement range R required for measuring the “measured amount”, and M = 4 of the measurement processing times Ta to Td. The processing unit 6 determines the measurement range R for each measuring unit 2 to measure the "measured amount" according to a predetermined "range determination procedure", and one of the measuring units 2 is configured to exist. When the measured value of the "measured amount" measured by M = 4 types of measurement processing time, the measurement range R8 having the longest measurement processing time Td is set when the predetermined "error judgment standard" is satisfied. The process of designating the "predetermined measurement range" to be excluded and causing the measurement unit 2 to measure the "measurement amount" is executed as the "first process".

Therefore, according to this light amount measuring device 1, a state in which a measured value satisfying the "error determination criterion" is output from any one of the measuring units 2, that is, the "measured amount" to be measured. Due to the very small value of the measured value (in this example, the amount of light of the laser beam L), when the optimum range is determined by the general auto range function, M = 4 types of measurement processing time. Even if it is possible to switch to the measurement range R8 having the longest measurement processing time Td, the measurement range R of the measurement unit 2 is not switched to the measurement range R8 having the longest measurement processing time Td. Since measurement is performed in a predetermined measurement range R (measurement range R1 in this example) other than R8, processing based on the measurement value (value of each measurement value data D) of each measurement unit 2 (in this example, measurement range R1). When the measurement result data Drgb is generated and the measurement result is displayed repeatedly), it is possible to preferably avoid a situation in which the execution cycle becomes excessively long.

Further, according to the light amount measuring device 1, when the processing unit 6 satisfies the "error determination criterion" in the "first processing" when the measured value of the "measured amount" by any of the measuring units 2 satisfies the "error determination criterion". M = By designating the measurement range R1 of the shortest measurement processing time Ta among the four types of measurement processing time as the "predetermined measurement range" and having the measurement unit 2 measure the "measurement amount". Even if a measurement value that satisfies the "error determination criterion" is output from any of the measurement units 2, the measurement range R of the measurement unit 2 is the shortest measurement processing time Ta measurement range. Since the measurement is determined by R1, the processing based on the measurement value (value of each measurement value data D) of each measurement unit 2 (in this example, the generation of the measurement result data Drgb and the display processing of the measurement result) is performed. It is possible to more preferably avoid a situation in which the execution cycle becomes excessively long when the execution is repeated.

Further, according to the light amount measuring device 1, the processing unit 6 sets the measured value of the "measured amount" measured in the "predetermined measurement range" by any of the measuring units 2 as the "error determination criterion". By executing the "third process" that identifiablely notifies the user that the measured value satisfies the "error judgment criterion" when the measurement value is satisfied, the user is informed that some abnormality has occurred in the measurement target or the like. On the other hand, it can be recognized reliably and easily.

The configuration of the "measuring device" is not limited to the configuration of the light intensity measuring device 1 described above. For example, a procedure for determining the measurement range R of each measurement unit 2 so as to sequentially switch the measurement range R from the measurement range R1 to the measurement range R8 according to the value of the measurement value data D from each measurement unit 2 is described as ". An example of "range determination procedure" has been described, but instead of such a configuration, the value of the measured value data D from each measuring unit 2 and the predetermined "optimal range range specifying information (what kind of value)" are described. It is also possible to adopt a configuration in which the procedure for determining the optimum range based on "which measurement range R is the optimum range when the measurement value data D is output)" is set as the "range determination procedure". it can. Even when such a configuration is adopted, the measurement range R of the measurement unit 2 from which the measurement value data D satisfying the "error determination criterion" is output is set to M = the longest measurement processing time among the four types of measurement processing times. By setting the measurement range R8 of Td to be a “predetermined measurement range”, the same effect as that of the above-mentioned light amount measuring device 1 can be obtained.

Further, when the value of the measured value data D satisfies the "error determination criterion", the measurement range R1 having the shortest measurement processing time Ta among M = 4 types of measurement processing times is set to the "predetermined measurement range". Although the configuration specified as is described as an example, a configuration in which the measurement ranges R2 and R3 are designated as the “predetermined measurement range” can also be adopted. Further, the "predetermined measurement range" is not limited to the "measurement range of the shortest measurement processing time", and the condition is "excluding the measurement range of the longest measurement processing time of the M types of measurement processing time". It is also possible to adopt a configuration in which an arbitrary "measurement range" is designated as a "predetermined measurement range" on condition that the condition is satisfied. Specifically, in the above-mentioned example of the light intensity measuring device 1, not only the configuration in which the measurement ranges R1 to R3 are set as the "predetermined measurement range" but also any one of the measurement ranges R4 to R7 is "predetermined". It is possible to adopt a configuration with a “measured range”.

Further, although an example including the measuring units 2R, 2G, and 2B having N = 8 types of measuring ranges R1 to R8 has been described, the number of types of the "measurement range" may be any number of two or more types. it can. Further, an example in which the "measurement processing time" for each measurement range R is set to M = 4 types of measurement processing times Ta to Td has been described, but the number of types of "measurement processing time" is two or more and "measurement". It can be any number less than or equal to the number of types of "range". In this case, in the above-mentioned light intensity measuring device 1, the number of types of "measurement range" (N types) and the number of types of "measurement processing time" (M types) are different such as N = 8 types and M = 4 types. However, it is also possible to match the number of these types with any number of two or more types.

Further, an example of executing the "third process (error notification)" when the state satisfying the "error judgment standard" is executed a plurality of times (three times in the above example) has been described, but the "error judgment standard" is used. It is also possible to adopt a configuration in which the "third process (error notification)" is executed when the satisfied state occurs once. Further, the execution of the "third process" (notification of an error) is not an essential configuration for the "measuring device", and a configuration in which the "third process" is not executed can be adopted.

In addition, the "measuring device" is not limited to the "light amount measuring device" such as the light amount measuring device 1, and "provides a plurality of measuring units for measuring the measured amount in any of a plurality of measuring ranges". , "There are multiple types of measurement processing time for each measurement range", and "Perform some processing based on the measured values measured by each measurement unit". In the "measuring device", "when the measured value of the measured amount measured by any of the measuring units meets the predetermined error judgment criteria, the measurement range of the longest measurement processing time is excluded. It is possible to adopt the configuration of "designating a measurement range and having one of the measuring units measure the measured amount".

1 Light amount measuring device 2R, 2G, 2B Measuring unit 3 Operation unit 4 Display unit 5 Storage unit 6 Processing unit 10 Measurement processing Dr, Dg, Db Measurement value data Drgb Measurement result data Lr Red light Lg Green light Lb Blue light Lrgb Synthetic light R1 to R8 measurement range Sr, Sg, Sb control signal Ta to Td measurement processing time

Claims (3)

A plurality of measuring units for measuring an amount to be measured in any one of N types (N is a natural number of 2 or more) are provided, and each of the measuring units is controlled to control any of the above. It is provided with a processing unit that alternately and repeatedly executes a first process for measuring the measured amount in a measuring range and a predetermined second process based on the measured value of the measured amount measured by each measuring unit. ,
Each of the measuring units is configured so that there are M types of measurement processing times (M is a natural number of 2 or more and N or less) for each measurement range required for measuring the measured quantity.
In the first processing, the processing unit sets the measurement range for which each measuring unit measures the amount to be measured , and the M types of measurement processing time according to the measured value measured by each measuring unit. The measurement range is determined so as to sequentially switch the measurement range from the measurement range having the shortest measurement processing time to the measurement range having the longest measurement processing time among the M types of measurement processing times. Based on the range determination procedure to be performed, the measurement value measured by each measurement unit, and information that can identify which measurement range is the optimum range when the measurement value of what value is output. converting mechanism determined in accordance with any of the range determination procedure for determining the measurement range, when one of the front Symbol measurement measured by the measurement unit satisfies the error criterion to be outside the normal value range the longest measuring processing time of measuring the measuring device for measuring the quantity to be measured by specifying a predefined the measurement range to the one of the measuring unit excluding the constant range. Wherein the processing unit in the first processing, when the measured value of the measured amount by the one of the measurement part satisfies a pre disappeared error criterion, the measurement range of the shortest measurement processing time The measuring device according to claim 1, wherein the measuring unit is designated as a predetermined measuring range to measure the measured amount. Wherein the processing unit when the measured value of said one of said measured amount measured by the measuring range the pre defined by the measurement unit satisfies a pre disappeared error criterion, the measurement values are those wherein measurement device according to claim 1, wherein executing the third process of identifiable informed that meets the error criterion.

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