JPH0754528B2 - Sensor identification information generator - Google Patents

Description

Description: (a) Technical Field The present invention relates to a sensor identification information generator, and more specifically, an analog having a function of receiving an output of a sensor that converts a physical quantity into an electric quantity and measuring the output. Sensor identification information for generating sensor identification information for identifying the type of input of the individual functional circuit, that is, the type of sensor, when a plurality of individual functional circuits including circuits are aggregated in the individual functional circuit matrix to form one unit It relates to a generator.

(B) Conventional Technology There have been remarkable technological advances in recent years, and the field of measurement is becoming more and more complicated, and there is a demand for measuring instruments to have higher performance and multiple functions. For example, in the case of multi-point measurement, generally, a system including a plurality of types of sensors, a plurality of types of physical quantity measuring devices provided corresponding to these sensors, a data recording device, a data processing device, etc. is assembled to perform the measurement. When performing measurement, if various measurement conditions are not recorded in advance in any form, when the data is reproduced by a multi-channel magnetic recording / reproducing device such as a so-called multi-channel data recorder as the data recording device, the data is reproduced. It becomes impossible to specify the content of the data. Therefore,
Conventionally, as one of the measurement conditions prior to measurement, as a connection work between each sensor and each amplifier, or a connection work between each amplifier and each recording channel of a multi-channel data recorder, or after the work, the above-mentioned respective connection relations (Correspondence) had to be recorded by means such as memo writing or voice memo. In other words, since it is a recording means that passes through a person, human error such as misunderstanding, erroneous recording, or forgetting to record may reduce the reliability of the recorded data. It takes a considerable amount of time for the work, and it is not possible to save labor and speed up the measurement. On the other hand, when reproducing the measurement data recorded in the data recorder to analyze the phenomenon, even if a large computer is used as the data processing device,
In the recording means, the measurement conditions have to be manually input each time, which has been a factor that impedes the high speed of the computer.

(C) Object The present invention has been made in view of the above circumstances, and an object of the present invention is to separately receive outputs of a plurality of sensors that convert various physical quantities into electric quantities and to independently receive these outputs. Simultaneous output of analog outputs, which are measurement data, from a plurality of analog circuits that have the function of performing measurement processing at the same time, and sensor identification information, which is part of the measurement conditions, is in one-to-one correspondence with the analog output that is the measurement data. It is possible to automatically output the data sequentially in a time-division manner, thereby saving labor and speeding up the measurement, and being able to obtain measurement data of various physical quantities for comparison at the same timing.
Another object of the present invention is to provide a sensor identification information generator that can improve the reliability of measurement data.

(D) Configuration In order to achieve the above-mentioned object, the present invention provides a plurality of sensors having a function of individually receiving outputs of a plurality of sensors for converting various physical quantities into electric quantities, and independently processing them simultaneously. A measurement circuit system in which a plurality of individual functional circuits including analog circuits are aggregated in an individual functional circuit matrix to form one unit, and the sensor is connected so as to have a one-to-one correspondence with each of the individual functional circuits. A sensor identification signal setting circuit including an externally operable digital switch that outputs a digital signal of multiple bits for identifying the type of the sensor identification signal, an output circuit that switches the output of the sensor identification signal setting circuit between valid and invalid, and the individual A common signal line formed of a plurality of bits, which is provided in the functional circuit mother body and in which a plurality of the output circuits can be connected in parallel, and an external computer or From the signal control circuit that controls the output circuit so that only the output of the specific sensor identification signal setting circuit corresponding to the command signal is connected to the common signal line by the command signal sequentially input from the logic circuit. The sensor identification signal of the sensor connected to the individual functional circuit is output from each individual functional circuit in the unit, and the sensor identification signal of the sensor connected to the individual functional circuit becomes one-to-one with the analog output in time division by the command signal. Correspondingly automatically output, the outputs of all the individual function circuits can be simultaneously recorded, and the individual function circuits that correspond only to the output of the specific sensor identification signal specifying circuit validated by the command signal. It is characterized in that it is configured so that it can be simultaneously recorded in correspondence with.

Hereinafter, the gist of the present invention will be described in detail based on examples.

FIG. 1 is a block diagram showing a schematic configuration of a sensor identification information generating device according to the present invention, FIG. 2 is a conceptual diagram showing an embodiment of a unit, and FIG. 3 is a device of the present invention. 3 is a circuit diagram showing a specific configuration of a sensor identification information generating circuit which is a main part of FIG.

In FIG. 1, reference numeral 1 is a measurement bridge having a Wheatstone bridge configuration including a strain gauge on at least one side. Here, such an element that converts a physical quantity into an electric quantity, such as the measurement bridge 1, the temperature sensitive element, or the humidity sensitive element, will be collectively referred to as a “sensor S”. Reference numeral 2 is a bridge power supply circuit for supplying carrier power to the measurement bridge 1, 3 is an input circuit for receiving the measurement output of the measurement bridge 1 and performing amplification and impedance conversion, 4 is a measurement bridge 1, a bridge power supply 2 and an input circuit 3. A connection cable 5 for connecting the input circuit 3 receives the output of the input circuit 3, and a carrier amplification circuit 6 for amplifying this signal level. 6 detects the output of the carrier amplification circuit 5 to remove the carrier component and to generate a noise component which becomes a disturbance. A detection / filter circuit that removes only the measurement signal, 7 is a DC amplification circuit that amplifies the measurement signal obtained by the detection / filter circuit 6, and 8 is an analog output terminal for extracting the output of the DC amplification circuit 7 to the outside Is. The bridge power supply circuit 2, the input circuit 3, the carrier amplification circuit 5, the detection / filter circuit 6, the DC amplification circuit 7 and the analog output terminal 8 constitute an analog circuit 9.

Reference numeral 10 is a monitor selection switch whose one end is grounded, 11 is a sensor identification signal setting circuit consisting of an externally operable 1-digit digital switch having a 4-bit binary number output, and 12 is 4 bits from the sensor identification signal setting circuit 11. Is an output circuit formed of a buffer gate for receiving the digital output signal of and switching the digital output signal between valid and invalid. The analog circuit 9, the monitor selection switch 10, the sensor identification signal setting circuit 11 and the output circuit 12 constitute an individual function circuit 13. Incidentally, the individual function circuit 13 in the figure shows one of a plurality of individual function circuits as a representative.

On the other hand, a portion 14 surrounded by a broken line in the figure is a unit monitor portion as a mother board of individual functional circuits. The unit monitor section 14 has a configuration in which a plurality of individual function circuits 13 can be assembled (that is, mounted). In the present embodiment, the individual function circuits 13 of the same type as the individual function circuit 13 shown in the first illustration are used. Sixteen circuits are mounted and one of the sixteen individual function circuits 13 is shown as a representative. Hereinafter, the 16 individual function circuits may be referred to as channels,
The illustrated individual function circuit 13 may be referred to as a first channel. Reference numeral 15 is a monitor selection circuit to which the terminal of the monitor selection switch 10 which is not grounded is connected, 16 is a display changeover switch which is changed over by the monitor selection circuit 15, and 16a is the analog output terminal 8 of the first channel.
1st channel contact tangent to, and so on 16b to 16p
Are contacts (not shown) respectively connected to the analog output terminals of the second to 16th channels,
2nd channel contact to 16th channel contact, 16 respectively
e is a common contact. Reference numeral 17 is a monitor display section equipped with an A / D converter, a 4-digit light emitting diode display, etc.
Are connected. Reference numeral 18 is a signal control circuit composed of a decoder, and 19 is a control input signal line for transmitting a control input signal as a command signal composed of 4 bits, which is connected to the outside, and is connected to an input terminal of the signal control circuit 18. 20a to 20p are control signal lines respectively connected to the output terminals of the signal control circuit 18, the control signal line 20a is connected to the control input terminal of the output circuit 12 of the first channel, and hereinafter 20b to 20p are also shown. Although omitted, they are connected to the control input terminals of the output circuits 12 of the second to 16th channels, respectively. 21 is 4
A bus line as a common signal line composed of bits is connected in parallel with the output circuit 12 of each channel.

In FIG. 2, 22 is a display window of the light emitting diode display which constitutes the monitor display unit 17, 23 is the first channel, 24 is the second channel, and 25 is the third channel (the same applies to the following figures. Omitted), and 26 is the last
There are 16 channels. And 27 is a unit. still,
Strictly speaking, one channel is composed of the measurement bridge 1, the connecting cable 4, and the individual function circuit 13, but the individual function circuit 13 will be treated as a representative thereof unless there is a problem in the description. In this embodiment, the unit 27 is composed of the individual function circuits 13 of the first to 16th channels and the unit monitor section 14.

In FIG. 3, 28 to 31 are control input terminals corresponding to the respective bits of the control input signal line 19, and 28 is the least significant bit (LS
B) and 31 correspond to the most significant bit (MSB). Reference numeral 32 is a binary-hexadecimal decoder as the signal control circuit 18, and its positive logic binary input terminals A to D are respectively control input terminals 28.
Connected with ~ 31. In addition, Y _{0 to} Y ₁₅ are each binary −1
Positive logic output terminal of hexadecimal decoder 32, input terminals A to D
One output terminal corresponding to the binary code added to H
Become a level. For example, expressing the above binary code in hexadecimal, Y ₀ is 0H, Y ₁ is 1H, and so on.
When FH, Y ₁₅ is configured to be H level.
The output terminals Y _{0 to} Y ₁₅ are connected to the control signal lines 20a to 20
It is connected to one end of d. 33 to 36 are identification signal output terminals corresponding to each bit of the bus line 21, 33 is LSB, 36 is M
It corresponds to SB. 37 to 40 are buffer gates having a so-called 3-state output having a high impedance state. When the control input terminal becomes L level, the output becomes a high impedance state, and conversely when it becomes H level, the gate becomes an operating state. Become. The output terminals of the buffer gates 37-40 are
Each is connected to the identification signal output terminals 33 to 36 via the bus line 21 in a one-to-one relationship. Also, the buffer gate 37-40
Each control input terminal of is connected in parallel
It is connected to the other end of 20a. 41 is a digital switch as the sensor identification signal setting circuit 11, 41a is a rotor for setting hexadecimal numbers 0H to FH, and 41b is a scale for confirming the set value. b _{0 to} b ₃ are output terminals for outputting a binary code corresponding to the value set by the rotor 41a. b ₀ is an LSB and b ₃ is an MSB. Of these, the output terminals b ₀ to
b ₃ is connected to the input terminal and the one-to-one buffer gates 37 to 40 respectively. However, in this embodiment, 0H ~
Of the set values up to FH, 6H to FH are used as sensor identification information, and 0H to 5H are not used because they are used for other definitions. Incidentally, P is a power supply terminal for generating a logic signal, which is connected to a + 5V power supply in this example, and COM is grounded at a common terminal. 42 is the control signal line 20
The sensor identification information generating circuit of the first channel is composed of a, buffer gates 37-40, bus line 21, and digital switch 41.

Similarly, 43 to 46 are buffer gates as the output circuit 12 of the second channel, 47 is a digital switch as the sensor identification signal setting circuit 11 of the second channel, 47a is a rotor of the digital switch 47, and 47b is a digital switch. 47 is a scale, P is a power supply terminal connected to + 5V of the digital switch 47, COM is a common terminal grounded, and the control input terminals of the buffer gates 43 to 46 are the control signal line 20b of the second channel, respectively. Other than that, the other grounding relations in the sensor identification information generating circuit 48 of the second channel are exactly the same as those of the sensor identification information generating circuit 42 of the first channel (hereinafter, in the drawing). Then, channels 3 to 15 are omitted). The same applies to the 16th channel which is the last channel, 49 to 52 are buffer gates, 53 is a digital switch,
53a is a rotor, 53b is a scale, and 54 is a sensor identification information generating circuit of the 16th channel. The buffer gate 49
The control input terminal of ~ 52 is the control signal line 20 of the 16th channel.
Other than that, the connection relationship is the same as that of the sensor identification information generating circuit 42 of the first channel. In addition, the sensor identification information generation circuits 42 to 16 of the first channel
The sensor identification information generating circuit 54 of this embodiment is constituted by the channel sensor identification information generating circuit 54.

The operation of this embodiment configured as described above will be described.

First, the operations of the analog circuit 9 and the monitor selection circuit 15 will be briefly described. Sensor S that converts a physical quantity into an electric quantity
The carrier power is supplied from the bridge power supply circuit 2 to the measurement bridge 1 via the connection cable 4 and the measurement signal from the measurement bridge 1 is input to the input circuit 3 via the connection cable 4. The input circuit 3 is the measurement bridge 1.
Impedance conversion to prevent disturbance to
The minute measurement signal is amplified by the carrier amplification circuit 5 at the next stage by a predetermined amount. Then, the detection / filter circuit 6 in the next stage detects the carrier wave modulated by the measurement output signal corresponding to the physical external force, extracts only the measurement signal, and removes harmful noise components. In the DC amplifier circuit 7, automatic or manual gain adjustment (not shown) is performed, and finally the measurement signal is output to the analog output terminal 8 and applied to the contact of the channel of the display changeover switch 16. It Here, the output of one analog circuit 9 has been described as a representative, but also from a plurality of analog circuits having the same configuration, measurement processing is performed based on the output detected by the sensor via each analog output terminal. The analog output signals thus generated are output simultaneously (at the same timing). Next, when the monitor selection switch 10 of the channel is turned on, the monitor selection circuit 15 connects the common contact 16e of the display changeover switch 16 to the contact of the channel (first channel contact 16a in the case of FIG. 1). The display changeover switch 16 is controlled as described above, and as a result, the measurement data of the channel is displayed on the monitor display unit 17.

Now, the sensor identification information generating circuit which is the main part of the present invention
The operation of 55 will be described in detail.

Now, assuming that the measuring bridge 1 of the first channel is a load converter, its rated capacity is 800 kg, and the measuring bridge 1 of the second channel is also a load converter, its rated capacity is 1400 kg, and similarly, the 16th channel Assume that the load converter has a rated capacity of 10t. Therefore, the operator uses the digital switches 41 to 16 of the first channel as the sensor identification information.
The channel digital switch 53 is set (for the sake of illustration, the description is given only for the first, second, and sixteenth channels, but the operation is the same for the omitted third to fifteenth channels). How to set the sensor identification information,
In other words, the method of making correspondence with the sensor is completely arbitrary, but a method that is easy for the operator (human) to understand is desirable. Here, in correspondence with the rated capacity of the load converter of each channel, the digital switch 41 of the first channel is
8H, 2nd channel digital switch 47 is EH (decimal 14), 16th channel digital switch 53 is AH
Set to (decimal 10). Therefore, the output terminals b _{0 to} b ₂ of the first-channel digital switch 41 are L level, only the output terminal b ₃ is H-level, and the output terminal b ₀ of the second-channel digital switch 47 is L level and the output terminal b ₁ ~ B ₃ goes to H level and the 16th channel digital switch 53
Output terminals b ₀ and b ₂ are at L level, and output terminals b ₁ and b ₃ are at H level. Therefore, next, a control input signal is applied to the control input terminals 28 to 31, for example, by a so-called microcomputer. Now, if 0H, that is, a control input signal in which the control input terminals 28 to 31 are all at L level is added as this control signal, only the output terminal Y ₀ of the binary-hexadecimal decoder 32 becomes H level, and the control of the first channel is performed. The control input terminals of the buffer gates 37 to 40 are all set to the H level via the line 20a, and the buffer gates 37 to 40 are activated. The other buffer gates 43 to 46 and 49 to 52 are electrically isolated from the bus line 21 because their outputs are in a high impedance state. Therefore, the output of the digital switch 41 of the first channel appears on the bus line 21 via the buffer gates 37-40. That is, the identification signal output terminals 33 to 35 are all L
Only the level and the identification signal output terminal 36 become the H level, and the signal of 8H which is the sensor identification information of the first channel is sent from the identification signal output terminals 33 to 36.

Next, 1H as the control input signal, that is, the control input terminal 28
A binary-hexadecimal decoder is provided when a control input signal whose only level is H level and all other levels are L level is applied to control input terminals 28-31.
Only the output terminal Y _{1 of} 32 becomes H level and the buffer gate
Only 43 to 46 are in the operating state, and the EH signal, which is the sensor identification information of the second channel, is output to the identification signal output terminals 33 to 36. In the same way, 2H ~ as the control input signal
When EH is sequentially applied to the control input terminals 28 to 31, the signals set as the sensor identification information of the third to fifteenth channels are output to the identification signal output terminals 33 to 36.
Finally, as the control input signal, FH, that is, the control input signal in which all the bits are at the H level is set to the control input terminals 28 to 31.
In addition, only the output terminal Y ₁₅ of the binary-hexadecimal decoder 32 becomes H level, the signal of AH which is the sensor identification information of the 16th channel, that is, the identification signal output terminals 33 and 35 are L level, and the identification signal output A signal in which the terminals 34 and 36 are at the H level is output to the identification signal output terminals 33 to 36. That is, when nH is given as a control input signal, the sensor identification information of the (n + 1) th channel is output to the identification signal output terminals 33 to 36 as the set signal, and the analog output of each channel and 1
The sensor identification information corresponding to the pair 1 is obtained.

Therefore, for example, even when the unit 27 shown in FIG. 2 is placed at the measurement site and remote measurement is performed, once set, the sensor rated capacity for analog output of an arbitrary channel can be easily set without going to the site. Can be specified.
That is, the input of all channels can be specified by recording only the rule of the correspondence relationship between the sensor and the set value set as the sensor identification information, and the correspondence relationship for each channel is recorded as in the conventional case. There is no need to do it. Further, when a multi-channel data recorder, a data processing device, or the like is connected to the device of the present invention and a system is assembled to perform measurement, 0H to FH is used as a control input signal.
Since the sensor identification information of each channel is automatically sent out sequentially by sequentially giving, it is not necessary to record the connection relationship after the unit 27 at all, and the sensor identification signal is simultaneously output as an analog output of each channel. If recorded in, there is an advantage that the input at the time of reproduction can be easily specified.

Further, even in a data processing device using a large computer, the input can be automatically specified only by previously inputting the rule of the correspondence relation between the sensor and the set value described above into the large computer.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be carried out by variously modifying without departing from the scope of the invention.

For example, the above-mentioned sensor is not limited to a load converter, but may be a strain gauge or a pressure converter, an acceleration converter, a temperature sensor, a humidity sensor, or any other sensor that converts a physical quantity into an electric quantity. Also, a sensor corresponding to each of the above sensors may be used.

Further, the setting range of the digital switch may be 0H to FH, and when it is limited to 6H to FH as in this embodiment, it is mechanically set by the structure of the digital switch so that only 6H.FH can be set. You may limit it. Further, this digital switch is not limited to one digit and may be arranged over a plurality of digits. In this case, it goes without saying that more detailed sensor identification information can be set.

Further, as the control input signal, by incorporating a hard logic circuit such as a hexadecimal counter, a sensor identification signal can be automatically transmitted without giving a control input signal from the outside.

(E) Effects As described in detail above, according to the present invention, a plurality of sensors having a function of separately providing outputs of a plurality of sensors for converting various physical quantities into electric quantities and independently performing simultaneous measurement processing are provided. Since a plurality of individual function circuits including analog circuits of the above are aggregated in the individual function circuit matrix to form one unit, each individual function circuit measures based on the physical quantity data detected by each connected sensor. A processed analog output is obtained, thus enabling simultaneous recording of multiple analog outputs at the same timing, which is extremely convenient for analyzing the correlation between the analog outputs.

In addition to this, according to the present invention, an externally operable digital signal that outputs a digital signal of a plurality of bits for identifying the type of the sensor connected in a one-to-one correspondence with the individual functional circuit is provided. A sensor identification signal setting circuit composed of a switch, an output circuit for switching the output of the sensor identification signal setting circuit between valid and invalid, and a plurality of bits provided in the individual function circuit mother body and capable of connecting a plurality of the output circuits in parallel. With the common signal line and the command signal sequentially input from the external computer or the hard logic circuit, only the output of the specific sensor identification signal setting circuit corresponding to the command signal is enabled and connected to the common signal line. It is composed of a signal control circuit that controls the output circuit, and is output from each individual functional circuit in the unit. For the analog output, the sensor identification signal of the sensor connected to the individual function circuit is automatically output in a time-division manner in a one-to-one correspondence with the analog output by the command signal, and all the individual function circuits described above. It is possible to simultaneously record the outputs of the above, and to record only the output of the specific sensor identification signal setting circuit validated by the command signal at the same time in association with the corresponding individual functional circuit. It is possible to provide a sensor identification information generating device that can save labor and speed up measurement work, and has very little room for intervention by human error, and can improve reliability of measurement data.

That is, when the unit is installed at the measurement site and remote measurement is performed, once set, the rated capacity of the sensor for analog output of an arbitrary channel can be easily specified by hand without going to the site. Input of all channels can be specified by recording only the rule of the correspondence relationship with the set value set as the identification information, and a multi-channel data recorder, a data processing device, etc. can be connected to the device of the present invention. When a system is assembled to perform measurement, sensor input information of each individual function circuit is automatically sent out sequentially by sequentially applying control input signals to the signal control circuit, so it is necessary to record all connection relationships after the unit. The sensor identification signal can be recorded on the multi-channel data recorder at the same time as the analog output from each individual function circuit. In addition, there is an advantage that input at the time of reproduction can be easily specified, and recording can be performed slowly and reproduction can be performed at high speed to realize high-speed processing, and even in a data processing device using a large computer, the sensor and the set value A number of advantages are obtained, such as the input can be automatically specified only by previously inputting the rule of the correspondence relation of (3) into a large computer.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic circuit configuration of a sensor identification information generating device according to the present invention, FIG. 2 is a conceptual diagram showing an embodiment of a unit, and FIG. 3 is a main part of the device of the present invention. FIG. 3 is a circuit diagram showing a specific configuration of the sensor identification information generating circuit that is 1 ... Measurement bridge, S ... Sensor, 2 ... Bridge power supply circuit, 3 ... Input circuit, 4 ... Connection cable, 5 ... Carrier amplification circuit, 6 ... Detection / filter circuit, 7 ... DC amplification Circuit, 8 ... Analog output terminal, 9 ... Analog circuit, 10 ... Monitor selection switch, 11 ... Sensor identification signal setting circuit, 12 ... Output circuit, 13 ... Individual function circuit, 14 ... Unit monitor section , 15 ... Monitor selection circuit, 16 ... Display selection switch, 17 ... Monitor display section, 18 ... Signal control circuit, 19 ... Control input signal line, 20a-20p ... Control signal line, 21 ... Bus Line, 28 to 31 ... Control input terminal, 32 ... Binary-hexadecimal decoder, 33 to 36 ... Identification signal output terminal, 37 to 40,43 to 46,49 to 52 ... Buffer gate, 41,47 , 53 …… Digital switch, 42,48,54,55 …… Sensor identification information generation circuit.

Claims (1)

[Claims] 1. A plurality of individual functional circuits including a plurality of analog circuits each having a function of individually receiving outputs of a plurality of sensors for converting various physical quantities into electric quantities and simultaneously measuring and processing them independently. A measurement circuit system in which a functional circuit matrix is assembled into a single unit,
A sensor identification signal setting circuit including an externally operable digital switch that outputs a digital signal of a plurality of bits for identifying the type of the sensor, which is connected to the individual functional circuit in a one-to-one correspondence with each other, and An output circuit that switches the output of the sensor identification signal setting circuit between valid and invalid, a common signal line formed of a plurality of bits that is provided in the individual function circuit mother body and that allows a plurality of the output circuits to be connected in parallel, and an external computer or hardware. From a signal control circuit that controls the output circuit so that only the output of the specific sensor identification signal setting circuit corresponding to the command signal is validly connected to the common signal line by a command signal sequentially input from a logic circuit or the like. The analog output from each individual function circuit in the above unit The sensor identification signal of the sensor connected to the circuit is automatically output in a time-division manner in a one-to-one correspondence with the analog output by the command signal, and the outputs of all the individual function circuits can be simultaneously recorded. A sensor identification information generating device characterized in that only the output of the specific sensor identification signal setting circuit validated by the command signal can be recorded at the same time in correspondence with the corresponding individual functional circuit.