JPH0677015B2 - Automatic urinalysis device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for automatically performing a urine test, and particularly to an automatic urine test apparatus for automatically measuring a color reaction of a urine test strip by a reflection photometric method. .

[Conventional technology]

Conventionally, using a urine test strip to test human urine, a device for automatically measuring the color reaction due to urine has been proposed,
It has already been put to practical use in hospitals and inspection centers.

Examples of conventional urine component testing methods include,
As disclosed in JP-A-51-119291, the color reaction portion of the urinalysis test paper is irradiated with white light from a white light source, and the reflected light is applied to each of the filters through individual filters of three colors. The three light receiving elements are used to detect light and determine the color tone. Further, in the conventional automatic urine test device, an integrating sphere is used as a white light source in order to prevent the influence of the deviation of the reflected light when measuring the reflected light of the urine test test paper.

[Problems to be solved by the invention]

However, the optical systems such as the filters, integrating spheres, and spectral slits are generally very expensive and difficult to assemble, and thus have not been widely used.

Further, the integrating sphere and the like are greatly deteriorated with age due to changes in reflectance, and maintenance and inspection are indispensable for accurate measurement.

It is an object of the present invention to provide an automatic urine test device which solves the above-mentioned problems when performing a urine test using a urine test strip and can be used by anyone with high accuracy.

Another object of the present invention is to sequentially illuminate the colored portion of the urinalysis test paper with a plurality of light emitting elements, judge the total amount of received light by comparing with a preselected judgment table, and display the judgment result in stages. An object of the present invention is to provide an automatic urine test device that can be divided and shown.

[Solution means and action]

According to the present invention, the color reaction of the urine test test paper, in an automatic urine test device for automatically optically detecting, a light emitting unit for irradiating the urine test test paper with light, the light emitting unit based on the light emission of the light emitting unit. A light receiving part for receiving the reflected light from the coloration part of the urine test paper, holding the light emitting part and the light receiving part, and at least a plurality of inspection positions for inspecting a plurality of color reaction parts of the urine test paper. The photometric head comprises a movable photometric head that can be sequentially moved, and a control unit that controls the measurement operation and the movement operation of the movable photometric head, and the light emitting unit of the photometric head sequentially outputs light of a plurality of colors to the urine test strip. A plurality of light emitting sources for irradiating a plurality of color reaction parts of the urine test strip, and the light receiving part of the photometric head receives one light reflected by the plurality of color reaction parts of the urinalysis test paper from the light emitting part. The elements receive light sequentially, and the control unit An object of the present invention is to provide an automatic urine test device characterized by detecting a plurality of color reaction of the urine test paper according to calculated values of received values of a plurality of reflected lights received by the light receiving section of the movable photometric head. .

Further, according to the present invention, in an automatic urine test device for optically automatically detecting a color reaction of a urine test strip, a light emitting unit for irradiating the urine test strip with light and a light emitting unit for emitting light And a light receiving unit that receives reflected light from the colored portion of the urine test paper, and a control unit that controls the operation of the light emitting unit and the light receiving unit. The urine test test paper is provided with a plurality of light-emitting sources for irradiating the color reaction portion of the urine test test paper, and the light receiving unit is provided in the color reaction reaction portion of the urine test test paper which receives the light emitted from the light emitting unit. The control unit includes a light receiving element that sequentially receives one reflected light, and the control unit compares the sum of the received light values of the plurality of reflected light received by the light receiving unit with a determination table, and the urine test strip. To provide an automatic urinalysis device characterized by examining the color reaction of It is something.

〔Example〕

1A is an external front view of an automatic urine test apparatus according to one embodiment of the present invention, FIG. 1B is a side view of the apparatus, and FIG. 2 is a front view of the apparatus in an open state showing the internal arrangement thereof. FIG. 3 is a block diagram showing the functional configuration of the embodiment shown in FIGS. 1 and 2, FIG. 4 is a flowchart showing the operation of the control unit of this embodiment, and FIG. 5 is another embodiment. FIG. 6 is a block diagram showing the functional constitution of the automatic urine test device, and FIG. 6 is a plan view showing the constitution of the urine test paper used in the embodiment of the present invention.

Referring to FIG. 1A and FIG. 1B to FIG. 3, this embodiment sets an operation display unit 1 for inputting and outputting measurement start, result display, operation guidance, etc., and a urine test sheet shown in FIG. Test sheet table 2, photometric section 3 for measuring the luminous intensity of urine test sheet, and control section 4 for controlling the operation of each section and determining the processing of the measurement result.
And a power supply circuit 5 for supplying necessary electric power to each part such as the operation display part 1 and the like. The photometric unit 3
Is configured to have a photometric head 31, a drive motor 32, a screw 33, a screw burring 34, a gear 35, and a photometric circuit board 36, and each of the test strips of the urine test strip set on the test strip table 2 , Green, orange, and red light are sequentially irradiated, and the luminous intensity of the reflected light is measured. The control unit 4 is the third
As shown in the figure, the D / A conversion circuit 41 and the A / D conversion circuit 42
And a control circuit 43 or the like configured by a CPU, for example.
The control unit 4 also performs activation of the urine test sheet table, display output of operation guidance, control of the measurement unit 3, control of calculation and display of measurement results, and the like.

This embodiment will be described in more detail. In FIG. 1, the operation display unit 1 and the measurement result display unit are provided on the surface of the apparatus.
11 is provided, and the measurement result display section 11 displays measurement items such as urobilinogen, occult blood, bilirubin ketone body, glucose, protein, PH, and nitrite in the blue, yellow, and red LEDs according to the measurement results. I do. Reference numerals 13 and 14 are a morning start (first urine) switch and a day / night start (other than the first urine) switch, respectively, and 15 is operation guidance for explaining the operation as the measurement progresses.

The inspection paper table 2 is a start switch of the operation display unit 1.
By pushing down 13 or 14, it is projected toward the front side as shown in FIG. 1B. Then, the urine test strip is set at a predetermined position. The test paper table 2 can be pushed back into the housing of the automatic urine test device, whereby the test paper table 2
Also, the photometric unit 3 is completely shielded from external light.

In FIG. 2, 2 is the above-mentioned inspection sheet table, 3 is a photometric unit, and the photometric head 31 is composed of a green-orange-red LED light emitting source and a light receiving element. A drive motor 32 rotates a screw 33, which will be described later, according to a control signal from the control unit 4 to move the photometric head 31 to a predetermined position. A screw 33 has a screw thread in a spiral shape, and is a screw for moving the photometric head 31 in the lateral direction along the screw thread by rotating. A screw burring 34 supports the screw 33. A transmission gear 35 is provided for transmitting the rotation of the drive motor 32 to the screw 33.

Reference numeral 36 denotes a photometry circuit board, which is composed of a photometry control circuit and controls the drive of the drive motor 32 and the emission control of the photometry head 31. Reference numeral 4 denotes a control unit, which includes a D / A conversion circuit 41, an A / D conversion circuit 42, and a control circuit 43 including a CPU. The measurement data is input from the photometry unit 3 and the measurement result is calculated and operated. In addition to outputting to the display unit 1, the light emission amount of the photometric unit 3 is controlled and the operation of each unit is controlled as described later. Reference numeral 5 denotes a power supply circuit, which supplies required power to each of the above parts.

FIG. 3 is a functional block diagram of this embodiment, 1 is an operation unit, 3
Is a photometry unit, 4 is a control unit, and 5 is a power supply unit.

FIG. 4 is a flowchart showing the flow of processing of the control unit 4.

FIG. 6 shows the urine test paper 100, which is a plastic stand 110.
Eight test strips 101 to 108 that have been treated with a reagent are attached. Test strips 101 to 108 are 101 for urobilinogen, 102 for occult blood, 103 for bilirubin, 104 for ketone bodies, 105 for glucose, 106 for protein, 107 for PH, 108 for coloration in response to nitrite. Soak test paper in urine before use.

Next, the operation and action of each part will be described in detail together with the function and operation method.

The measurer first turns on the power. Then, the morning start switch 13 or the day / night start switch 14 is pressed down according to the distinction of urine measured by the operation display unit 1 arranged on the front surface. The functions of the morning start switch 13 and the day / night start switch 14 will be described in detail later.

When the start switches 13 and 14 are turned on, a start signal is input to the control unit 4. When the start signal is input, the control circuit 43 drives the inspection sheet table drive circuit 20 and the first B
As shown in the figure, the inspection sheet table 2 is automatically projected toward the operator. At the same time, the control circuit 43 turns on the LED at the location of "immersing" the operation guidance 15 of the operation display unit 1. The measurer dips the urine test paper 100 into urine according to the guidance content of the operation guidance 15, sets the urine test paper 100 at a predetermined position of the projecting test paper table 2, and moves the test paper table 2 to a predetermined position of the main body. That is, when the inspection paper table 2 is pushed into the housing of the automatic urine test device and set at a predetermined position, the inside of the main body is completely shielded from external light. (All the operations up to this point are done according to the guidance time.) When the control circuit 43 has passed a predetermined time,
In the “Measuring” section of the operation guidance 15 on the operation display unit 1.
Turn on the LED and start the measurement. At this time, if the inspection sheet table 2 is not closed or the inspection sheet is not set at the predetermined position, an error is detected and displayed by the normal measurement operation. At this automatic urine measurement position, the light emission amount of the LED of the light emission source is corrected for measurement (step 4 in FIG. 4). This is done to eliminate variations in the amount of light emitted from the LEDs and measurement errors due to the performance of the light receiving element. The operation will be described below. Photometric head 31 is urine test paper
When 100 is set on the inspection paper table 2, it is located at the home position 21. The home position 21 is before the measurement of the urine test strip 100 (the position on the left side of the test strip 101 in FIG. 6). The control circuit 43 drives the emission wave drive circuit 360 via the D / A conversion circuit 41.
The emission wave drive circuit 360 receives a signal from the control circuit 43,
Turn on the green LED of the photometric head 31. The photometric head 31 has a configuration in which three types of green-orange-red LEDs 310 are arranged in a triangular shape, and a light receiving element 311 is arranged in the center thereof. Home position 2
The reflected light of the green LED at 1 is received by the light receiving element 311, converted into an electric quantity by the photoelectric conversion amplifier 361, further digitally converted by the A / D conversion circuit 42, and input to the control circuit 43. The control circuit 43 performs a comparison operation with a predetermined value that has been determined in advance, and if it is not a predetermined value, the emission wave drive circuit 360 calculates a correction value in order to correct the light emission amount so that it becomes the predetermined value. By this correction operation, it is possible to correct variations in the amount of received light signal due to changes in the amount of light emitted from the LED due to environmental conditions and changes over time, changes in the performance of the light receiving element, and the like. Sequentially, the control circuit 43 is orange LED, red LED
Similarly, a correction value is calculated in the emission wave drive circuit 360.

Next, referring to FIG. 3 and FIG. 4, the control circuit 43 controls the motor drive circuit 320 according to the movement length of the photometric head 31 preset by the interval between the test strips of the urine test strip 100. It is driven and the drive motor 32 is actuated to move the photometric head 31 right above the urobilinogen test strip 101 of the first test item (step (5) in FIG. 4). Drive motor 32
The screw 33 rotates in accordance with the driving amount of, and the photometric head 31 on the screw moves in the lateral direction according to the amount of rotation. Next, the photometric operation will be described. The control circuit 43 turns on the green LED in the light emitting element 31a of the photometric head 31 via the emission wave drive circuit 360. The irradiation light of the green LED is reflected by the urobilinogen test paper strip 101, the reflected light is input to the light receiving element 31b, and the reflected light amount is photoelectric conversion amplifier 361.
Is converted into a quantity of electricity by the A / D conversion circuit 42 and is digitally converted by the A / D conversion circuit 42 and input to the control circuit 43 (step 6 in FIG. 4). Thereafter, the orange LED and the red LE of the light emitting element 31a are the same as above.
The respective amounts of reflected light are digitally converted in the order of D and input to the control circuit 43 as digital values. Control circuit 43
Then, the digital values of the reflected light amounts of the green, orange, and red LEDs are summed up and compared with the urobilinogen determination table stored in advance (step 7 in FIG. 4). In the determination table, the determination value is divided into 3 to 6 stages according to the measurement item, and for example, urobilinogen is divided into 5 stages. The control circuit 43 compares the total sum of the digital values of the reflected light amount with the judgment table, and detects it as the measured value of the corresponding judgment value category. Then, the detected measurement value is further divided into three levels, that is, "standard value", "attention", and "attention"
The result is displayed on the measurement result display section 11 of the operation display section 1. The measurement result display unit 11 displays the blue LED lighting if the standard value is the item of urobilinogen, the yellow LED lighting if it is “attention”, and the red L for “attention”
Turn on the ED (step 8 in FIG. 4). Where the yellow LED
"Attention" prompts the doctor to make a diagnosis, and the red LED "Attention" means that the doctor must make a diagnosis.

Next, since the control circuit 43 has not completed all the measurement items (up to sulfite), the photometer head 31 is moved to the next measurement item, the occult blood test strip 102, by the preset movement length setting.
Move to the top. Hereinafter, similarly, the amount of reflected light of occult blood in green, orange, and red is measured, and the total sum of digital values is compared with the previously stored occult blood determination table, the result is determined, and the measurement result display unit 11 of the operation display unit 1 Turn on the corresponding item of blue-yellow-red LED 110 of the occult blood item.

Hereinafter, similarly, the color reaction of the test paper strips 103 to 105 of bilirubin, ketone body, glucose, protein, PH, and nitrite is measured, and the result is displayed. The control circuit 43 returns the photometric head 31 to the home position 21 after the measurement of nitrite is completed.

Next, morning start switch 13 and day / night start switch 14
The function of is described. In the urine test, it is important whether the urine to be tested is the first urine in the morning or other urine. That is, in the case of performing the test of 8 items as in the present example, it is desirable to test the first urine in the morning, and in the case of other urine, especially regarding the 4 items of pH, glucose, protein, and nitrite, originally. There is a high possibility that the value of will not be detected.

Therefore, in this example, the test results of the above four items are displayed as reference data except for the first morning urine. When starting the test, the measurer depresses the morning start switch 13 when the urine to be tested is the first urine in the morning. When the morning start switch 13 is pressed down, the control circuit 43
A morning start signal is input to the control circuit 43, and the control circuit 43 sequentially measures eight inspection items as described above, and the result is displayed on the operation display unit.
Display with 11 LEDs. When the day / night start switch 14 is pressed, a day / night start signal is input to the control circuit 43. The control circuit 43 sequentially measures eight inspection items, and displays the measurement results of four items of occult blood, urobilinogen, ketone bodies, and pyrilbin among the items on the LED of the measurement result display section 11 as described above, and other clogs are displayed. pH, glucose,
The measurement results of the four items of protein and nitrite are displayed as blinking data on the LED of the measurement result display section 11 as reference data.

As another embodiment of the present automatic urine test measuring device, it is possible to add a transmitting means 6 so that the measurement result, the personal code and the like can be transmitted to the outside. In this case, the individual selection switch 16 is installed in the operation instruction section 1 (see FIG. 5). By connecting to an external computer or the like and accumulating data, it becomes possible to statistically process individual inspection data and make more accurate judgments. Hereinafter, a method of transmitting the measurement result to the outside will be described. When making measurements every morning, the measurer turns on his / her personal selection switch 16 and morning start switch 13 which have been registered in advance. Then, the urine test paper is dipped in the first urine in the morning and set on the test paper table. Hereinafter, measurement is performed by the same operation as described above. After the measurement is completed, the control unit 4 performs an error check, and if there is no error, the communication unit 6 sends the measurement result together with the personal code and the code indicating the first morning urine to the external processing unit. The measurement result transmitted at this time may have three levels of "standard value", "caution", and "attention", but a finer measurement can be made by transmitting the measurement values classified into 3 to 6 according to the above-mentioned determination table. The result is obtained.

〔The invention's effect〕

According to the present invention, a light source which is a semiconductor element of a plurality of colors is used without using an optical system conventionally used for determining a color reaction of a urine test strip, for example, an integrating sphere spectral slit or a filter. Therefore, it has a long life, is easy to assemble, and can be manufactured at low cost.

Further, as described above, since the correction means for correcting the light emission amount of the light emitting source for each measurement is provided, there is no measurement error due to the variation of the light emitting amount of the light emitting source or the performance of the light receiving element, and an extremely accurate automatic urine test apparatus is provided. Can be provided.

Furthermore, since it has the first urine and other selection switches, it enables highly accurate urinalysis. Further, in the automatic urine test device of the present invention, the light emitting element and the light receiving element are incorporated in the measuring head, and the measuring head is configured to be movable and moved to a plurality of test positions. Therefore, it is possible to further contribute to the elimination of the above-mentioned variation in measurement accuracy.

In addition, since the total sum of the amount of light received by the light receiving elements is compared with the determination table and the determination result is shown by a plurality of determination categories, the determination result can be easily grasped.

[Brief description of drawings]

1A is an external front view of an automatic urine test apparatus according to one embodiment of the present invention, FIG. 1B is a side view of the apparatus, and FIG. 2 is a front view of the apparatus in an open state showing the internal arrangement thereof. FIG. 3 is a block diagram showing the functional configuration of the embodiment shown in FIGS. 1 and 2, FIG. 4 is a flowchart showing the operation of the control unit of this embodiment, and FIG. 5 is another embodiment. FIG. 6 is a block diagram showing the functional configuration of the automatic urine test device, and FIG. 6 is a plan view showing the configuration of the urine test paper used in the embodiment of the present invention. 1 ... Operation display part, 2 ... Inspection sheet table, 3 ... Photometric part, 4 ... Control part, 5 ... Power supply circuit, 31a ... Light emitting element, 31b ... Light receiving element, 43 ... Control circuit.

Claims (4)

[Claims] 1. An automatic urine test device for automatically optically detecting a color reaction of a urine test test paper, comprising: a light emitting unit for irradiating the urine test test paper with light; and the urine based on the light emission of the light emitting unit. A light receiving part for receiving the reflected light from the coloration part of the test test paper, holding the light emitting part and the light receiving part, and sequentially to a plurality of test positions for testing at least a plurality of color reaction parts of the urine test test paper A movable photometric head movable to, and a control unit for controlling the measurement operation and the moving operation of the movable photometric head, the light emitting unit of the photometric head sequentially outputs light of a plurality of colors of the urine test strip. A plurality of light emitting sources for irradiating a plurality of color reaction parts are provided, and the light receiving part of the photometric head includes one light receiving element for receiving light reflected from the plurality of color reaction parts of the urine test test paper from the light emitting part. Sequentially receives light, and the control unit is movable. A plurality of reflected light automatic urinalysis apparatus and detecting a plurality of color reaction of the urinalysis test paper in accordance with the calculated value of the received-light value of light received by the light receiving portion of the optical head. 2. The control unit compares a light receiving value received by the light receiving unit with a predetermined reference value based on light emission at a reference position of the photometric head separated from the plurality of inspection positions, The automatic urine test apparatus according to claim 1, further comprising a correction unit that corrects the difference. 3. An automatic urine test device for optically automatically detecting a color reaction of a urine test paper, a light emitting unit for irradiating the urine test paper with light, and the urine based on the light emission of the light emitting unit. It is configured to include a light receiving unit that receives the reflected light from the colored portion of the inspection test paper, and a control unit that controls the operation of the light emitting unit and the light receiving unit, and the light emitting unit sequentially has a plurality of colors. The urine test test paper is provided with a plurality of light emitting sources for irradiating the color reaction part of the urinalysis test paper, and the light receiving part receives light emitted from the light emitting part and is reflected by the color reaction part of the urine test test paper. The control unit compares the sum of the received light values of the plurality of reflected lights received by the light receiving unit with a determination table, and presents the urine test strip. An automatic urine test device characterized by inspecting color reaction. 4. The automatic urine test apparatus according to claim 1, further comprising an operation section for setting the first urine and other urine, and the inspection item is automatically set according to the setting of the operation section.