TWI822279B - Detection method - Google Patents

Abstract

A detection method includes the following steps: providing a detection carrier and at least a look-up table (LUT); outputting a detection light to the detection carrier; receive a reference signal reflected from a reference display area and a detection signal reflected from a detection display area; obtaining a comparison value by operating on a first grayscale value of the reference signal and a second grayscale value of the detection signal; reading a content of the LUT corresponding to the comparison value.

Description

Optical detection method

The present invention relates to an optical detection method, in particular to an optical detection method that calculates reflected optical signals based on differences in gray scale values.

Most of the existing material optical detection methods use manual methods to interpret visual detection content, and most of the interpretation results are searched and calculated manually.

However, there is a certain degree of risk of misjudgment in manually interpreting, searching, or calculating visual test content, especially for risky medical tests or legal-related forensic evidence, which may be caused by the operator's negligence. and lead to erroneous results.

For this reason, how to propose an optical detection method is an important topic studied by the inventor of this case.

The purpose of the present invention is to provide an optical detection method that automatically reads out the detection results corresponding to the visual detection content after performing optical projection, reflection and calculation on the visual detection content, thereby saving manpower and improving detection accuracy. Purpose.

In order to achieve the above object, the optical detection method proposed by the present invention includes the following steps: providing a detection carrier and at least one lookup table, the detection carrier includes a reference display area and at least one display area to be tested; outputting detection light to the detection carrier, and Project the detection light to the reference display area and a display area to be tested; receiving a reference signal reflected from the reference display area and a signal to be measured reflected from the display area to be measured, and confirming the reference display area and the display area to be tested through a judgment program, where the reference signal includes the first signal of the reference display area The grayscale value, and the signal to be measured includes the second grayscale value of the display area to be measured; a comparison value is obtained after performing an operation on the first grayscale value and the second grayscale value; and the corresponding value is read according to the lookup table. The content of the comparison value.

In some embodiments, the detection light system contacts the reference display area and the display area to be tested sequentially or simultaneously.

In some embodiments, the optical detection method further includes the following steps: using the first voltage level difference obtained by sensing the first gray scale value as a reference signal; and using the first voltage level difference obtained by sensing the second gray scale value. The obtained second voltage level difference is used as the signal to be measured; the first voltage level difference is greater than or equal to the second voltage level difference.

In some embodiments, the reference display area is disposed adjacent to one end of the detection carrier at a position of the detection carrier.

In some embodiments, the judgment procedure includes the following steps: receiving a plurality of gray-scale signals reflected from the detection carrier; judging the one with the strongest signal intensity difference among the gray-scale signals as the background signal; judging the gray-scale signals. The signal other than the background signal in the gray-scale signal, which is closest to one of the strongest signal strength differences, is used as the reference signal; and the background signal and other signals other than the reference signal in the gray-scale signal are determined as the signal to be measured.

In some embodiments, the optical detection method further includes the following steps: transmitting the reference signal and the signal to be measured to the controller, and the controller performs the operation.

In some embodiments, the detection light is in the form of a line or a surface, and covers at least part or all of the reference display area and at least part or all of the display area to be measured.

In some embodiments, the color of the detection light is different from the colors of the reference display area and the display area to be tested.

In some embodiments, the color of the detection light is the complementary color of the color of the reference display area and the color of the display area to be measured after being reacted by the substance to be measured.

In some embodiments, the lookup table is stored on a cloud server.

To sum up, the optical detection method of the present invention is to optically capture the visual results after the interaction between the detection carrier and the object to be tested after the detection carrier is applied to the object to be tested. In particular, the detection carrier can use a plurality of A display area is used to present the visualization result, for example, a reference display area used as a reference and a test display area used to interpret the test results of the object to be tested. Then, the detection light can be projected to the reference display area and the display area to be tested sequentially or simultaneously, and the reference signal reflected from the reference display area and the test signal reflected from the display area to be tested can be received sequentially or simultaneously.

It is worth mentioning that the visualization result can be a plurality of blocks of the same color or different colors containing differences in gray scale values, and the color of the detection light can be the result of the reaction of the test object with respect to the display area to be tested presented by the detection carrier. The complementary color (or contrasting color) of the color is used to enhance the sensitivity or resolution of the interpretation of the difference in gray scale values in each display area.

Finally, the first grayscale value and the second grayscale value are calculated to obtain a comparison value corresponding to the difference in grayscale value, and the content corresponding to the comparison value is read according to the lookup table to detect the corresponding object to be measured. result.

To this end, the optical detection method of the present invention automatically reads out the detection results corresponding to the visual detection content after performing optical projection, reflection and calculation on the visual detection content, thereby saving manpower and improving detection accuracy. purpose.

In order to further understand the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. I believe that the features and characteristics of the present invention can be obtained from this in-depth and specific understanding. , however, the attached drawings are only for reference and illustration, and are not intended to limit the present invention.

10:Detection carrier

11: Detection shell

20:Detection module

21:Light source

22: Sensor

23:Controller

30:Cloud server

100: linear light

101: Surface light

102: Reference signal

103: Signal to be measured

A: Reference display area

B: Display area to be tested

C: Display area to be tested

T: Bracket

X ₀ : Voltage level difference

X ₁ : Voltage level difference

X ₂ : Voltage level difference

X ₃ : Voltage level difference

S1~S6, S11~S14: steps

Figure 1 is a schematic structural diagram of the first embodiment of the optical detection method of the present invention; Figure 2 is a functional block diagram of the optical detection method of the present invention; Figure 3 is a schematic diagram of the signal reflection intensity of the corresponding detection carrier of the optical detection method of the present invention; Figure 4 is a schematic structural diagram of the second embodiment of the optical detection method of the present invention; FIG. 5 is a schematic flow chart of the optical detection method of the present invention; and FIG. 6 is a schematic diagram of the judgment procedure of the optical detection method of the present invention.

The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples. The present invention illustrates Various modifications and changes in the details in the book can also be made based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the structure, proportion, size, number of components, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification and are for the understanding and reading of those familiar with this technology. They are not intended to limit the scope of the present invention. Any structural modifications, changes in proportions, or adjustments in size shall fall within the scope of this invention as long as it does not affect the effects that can be produced and the purposes that can be achieved. The technical content disclosed by the invention must be within the scope that can be covered.

The technical content and detailed description of the present invention are as follows with reference to the drawings.

Figure 1 is a schematic structural diagram of the first embodiment of the optical detection method of the present invention; Figure 2 is a functional block diagram of the optical detection method of the present invention; Figure 3 is a schematic diagram of the signal reflection intensity of the corresponding detection carrier of the optical detection method of the present invention.

As shown in FIG. 1 , the hardware architecture used in the optical detection method proposed by the present invention may include a detection carrier 10 and a detection module 20 .

The detection carrier 10 is used to receive an object to be tested (not shown in the figure), and may include a reference display area A, a display area to be tested B, and a display area to be tested C.

In the first embodiment, the position of the reference display area A on the detection carrier 10 may be disposed adjacent to one end of the detection carrier 10 (for example, the leftmost display area or the rightmost display area, etc.); in addition, The position of the reference display area A on the detection carrier 10 can also be set based on the maximum value of a plurality of gray levels displayed on the detection carrier 10 (for example, the lightest or darkest brightness of any color).

It is worth mentioning that for the determination procedure of the position of the reference display area A on the detection carrier 10, please refer to the subsequent description of step S4 for details.

As shown in Figures 1 and 4, in the first embodiment, the detection carrier 10 can be one of the exposed display areas or display windows of the detection housing 11 constituting a detection rod. In actual operation, The detection operation can be performed on the entire detection housing 11 , or only the detection carrier 10 can be used to perform the detection operation. For the convenience of subsequent detailed description, the implementation mode of using the detection carrier 10 alone to perform the detection operation will be described in detail below.

In the first embodiment, the reference display area A is used as a reference for the visual results of the detection. For example, taking the color depth of 256 grayscales of 8 bits as an example, if the reference display area A displays: The visualization result closest to the L255 gray scale (that is, when the background color of the detection carrier 10 is white relative to other parts of the display areas A, B, and C, it represents the darkest brightness of any color).

It is worth mentioning that in the first embodiment, the color of the detection carrier 10 used can be any color in the red system, and the reference display area A will be displayed by default as the red closest to the L255th gray scale. Each of the display areas B and C to be tested will display red with any gray scale between L0 (that is, the lightest one representing any color) to L255 based on the object to be tested and the result of its reaction.

In the first embodiment, the reference display area A and the display areas B and C to be tested may be arranged side by side continuously or discontinuously according to gray scale changes; in one implementation, the reference display area A The brightness is deeper than the brightness of the display area B to be tested, and the brightness of the display area B to be tested is deeper than the brightness of the display area C to be tested.

In the first embodiment, the opposite sides of the detection carrier 10 (for example, the left and right sides shown in FIG. 1 ) may further have a thickness difference as a foolproof mechanism for detecting the direction or position, so as to avoid the detection during inspection. If incorrect detection results are read due to misalignment of direction or position, the anti-fool mechanism can improve the accuracy and reliability of the detection results.

It is worth mentioning that when the entire detection housing 11 is used for detection, the anti-fool mechanism as mentioned above is achieved by forming a thickness difference on the opposite sides of the detection housing 11; and when only the detection operation is performed, When the carrier 10 performs a detection operation, the foolproof mechanism as described above is achieved by forming a thickness difference on opposite sides of the detection carrier 10 in other areas other than the reference display area A and the display areas B and C to be tested.

In particular, the brightness defined in the present invention can be defined in a completely opposite specification to that disclosed in the first embodiment according to actual needs. For example, L0 is the deepest brightness, and L255 is the lightest brightness.

The detection module 20 may include a light source 21, a sensor 22 and a controller 23, and may be disposed adjacent to one side of the detection carrier 10.

The light source 21 is used to emit detection light to the detection carrier 10 .

In the first embodiment, the light source 21 may include a general light-emitting diode or a laser diode (LD) (that is, a semiconductor laser element used to output laser light), and the light-emitting diode The polar body may include a red light-emitting diode in the visible light range (for example, aluminum gallium arsenide (AlGaAs), gallium arsenide phosphide (GaAsP), aluminum indium gallium phosphide (AlGaInP), gallium phosphide doped zinc oxide ( GaP: ZnO)), orange light-emitting diodes (for example: gallium arsenide phosphide (GaAsP), aluminum indium gallium phosphide (AlGaInP), gallium doped X phosphide (GaP: X)), yellow light-emitting diodes Polar body (for example: gallium arsenide phosphide (GaAsP), aluminum indium gallium phosphide (AlGaInP), gallium phosphide doped with nitrogen (GaP:N)), green light emitting Photodiodes (such as indium gallium nitride (InGaN), gallium nitride (GaN), gallium phosphide (GaP), aluminum indium gallium phosphide (AlGaInP), aluminum gallium phosphide (lGaP)), blue light-emitting diodes body (such as zinc selenide (ZnSe), indium gallium nitride (InGaN), silicon carbide (SiC)), violet light-emitting diodes (such as: indium gallium nitride (InGaN)), and those that can include the invisible light range Infrared light emitting diodes (such as gallium arsenide (GaAs), aluminum gallium arsenide (AlGaAs)) or ultraviolet light diodes (such as diamond, aluminum nitride (AlN), aluminum gallium nitride (AlGaN) ), aluminum gallium indium nitride (AlGaInN), etc. or white light diodes, and the form of light-emitting diodes may also include organic light-emitting diodes (OLED). Furthermore, the light source 21 may be one of a red laser diode, a green laser diode or a blue laser diode.

In the first embodiment, the detection light output by the light source 21 may include linear light 100 as shown in Figure 1 or surface light 101 as shown in Figure 4. This embodiment takes linear light 100 as an example. .

Furthermore, when the detection light output by the light source 21 is linear light 100, the light source 21 may be an edge emitting laser (EEL); when the detection light output by the light source 21 is surface light 101, the light source 21 It may be a light emitting diode or a surface emitting laser (SEL), and the surface emitting laser may be a vertical cavity surface emitting laser (VCSEL), and the The VCSEL can also adjust the light pattern of the detection light projected to the detection carrier 10 through the lens group (not shown in the figure), so that the detection light covers only part or all of the reference display area A and the display areas B and C to be tested; Of course, the present invention can also use general light-emitting diodes combined with the lens group to adjust the light pattern of the detection light projected to the detection carrier 10 so that the detection light covers only one of the reference display area A and the display areas B and C to be tested. Part or all, the above is only an example.

Furthermore, by adjusting to the linear light 100, the amount of data collected for the detection results can be reduced (for example, based on the number of pixels covered by the reflected light on the sensor 22), thereby reducing the burden of back-end calculations or speeding up the calculations; and Or it can be adjusted to the surface light 101 to increase the amount of collected data to a limited extent without adding too much burden to the back-end calculation or slowing down the calculation speed too much (relative to the detection light covering the entire detection carrier 10 ).

In the first embodiment, the light source 21 can also be equipped with a lens group (not shown in the figure) to adjust the light pattern projected onto the detection carrier 10. The light pattern can include a line pattern or a surface pattern, and is overlaid on the reference display. At least part or all of area A and at least part or all of display areas B and C to be tested.

In the first embodiment, the detection light can be projected onto the reference display area A, the display area to be tested B, and the display area to be tested C at the same time; it can also be projected onto the reference display area A, the reference display area A, and the display area to be tested sequentially. On the display area B and the display area C to be tested; or it can be projected on the reference display area A and the display area C to be tested first, and then projected on the display area B to be tested, thereby achieving space and time Various control methods.

The sensor 22 is used to receive the light reflected from the detection carrier 10 (including the reference signal 102 and the signal to be measured 103).

In the first embodiment, the sensor 22 may include a charge-coupled device (CCD), a complementary metal-oxide-semiconductor (CMOS) image sensor, a camera or other devices. The hardware for capturing visible light images is used to receive the reference signal 102 reflected from the reference display area A and the test signals 103 reflected from the display areas B and C to be tested.

In the first embodiment, the number of sensors 22 may be multiple, and may be arranged in a linear or planar array form. For example, the array form may vary according to the shape of the detection carrier 10 or the detection light.

It is worth mentioning that in the first embodiment, the controller 23 can use the change in voltage level (also called potential) corresponding to the difference in gray scale values sensed by the sensor 22 as the signal. The reference signal 102 and the signal to be measured 103 , that is, the sensor 22 can receive the potential changes produced by the reflected light reflected from the detection carrier 10 on each pixel of the sensor 22 for the controller 23 to calculate and determine the reference signal 102 and the signal to be measured 103.

In the first embodiment, the controller 23 is electrically connected to the light source 21 and the sensor 22 and provides control signals to perform control operations. The controller 23 may include electronic circuits and firmware, specifically a controller. 23 can be a microcontroller (MCU) or other components with the same function, and is used to correspond to the visual results with grayscale value differences, and calculate the reference signal 102 and the signal to be measured 103 to obtain the comparison value. The operation will be detailed in the following description of the method flow in Figures 3 and 5.

Furthermore, the sensor 22 senses the first grayscale value in the reference signal 102 and the second grayscale value in the signal to be measured 103 to generate a signal waveform, and the controller 23 performs the processing on the signal waveform. The operation is performed after noise processing, and the comparison value is obtained through interactive operation of different grayscale values.

In the first embodiment, the sensor 22 senses the difference in gray scale values based on the received light intensity difference reflected from the detection carrier 10. When different display areas (for example, A, B, C) have When the gray scale values are different, the received signals of the sensor 22 are different. The controller 23 detects the voltage level difference (for example, X ₀ ) are compared to obtain the voltage level differences corresponding to different display areas (for example, X ₁ , _{X 2 ,} The method of obtaining X ₀ , X ₁ , X ₂ , and X ₃ will be described in detail in the following content about step S5.

It is worth mentioning that the visualization result can be a plurality of blocks of the same color or different colors containing differences in grayscale values, and the color of the linear light 100 can be relative to each display area presented by the detection carrier 10 (for example, the area to be measured). The complementary color (or can be called contrasting color) of the color of the display area B and the display area to be measured C after being reacted by the object to be measured. For example, in the first embodiment of the present invention, the detection carrier 10 used The color can be any color in the red system, and the color of the linear light 100 can be green or cyan that is contrasting or complementary to the red system to enhance the sensitivity or analysis of the sensor 22 to the difference in gray scale values in each display area. Degree etc.

In the first embodiment, a cloud server 30 may be further included. The cloud server 30 may receive the comparison value from the detection module 20 and compare the comparison value with a lookup table stored on the cloud server 30 -up table, LUT) for comparison to find the content of the corresponding comparison value.

Furthermore, the color of the display areas B and C to be tested after being reacted by the object to be tested and the color of the linear light 100 can be other corresponding paired complementary colors, for example, green and magenta, blue and yellow, yellow and purple. , blue and orange, etc.

In the first embodiment, the sensor 22 can simultaneously receive the reference signal 102 reflected from the reference display area A, the test signal 103 reflected from the display area B to be tested, and the test signal 103 reflected from the display area C to be tested. Signal 103; the reference signal 102 reflected from the reference display area A, the signal to be measured 103 reflected from the display area B to be measured can also be received in stages and sequentially. The signal to be tested 103 reflected from the display area C to be tested; or the reference signal 102 reflected from the reference display area A, the signal to be tested 103 reflected from the display area C to be tested, and then the signal 103 reflected from the display area to be tested is received. The signal to be measured 103 in area B is used to achieve various control methods of space and time.

In the first embodiment, the detection module 20 may further include a storage unit (not shown in the figure) that stores a look-up table (LUT). The controller 23 may connect to the storage unit and read the LUT for interpretation and comparison. basis of value. The storage unit may include other non-volatile data-storable media such as EEPROM or NAND Flash, and the storage unit may be updated through I2C wired programming or over-the-air programming (OTA) wireless transmission. The stored LUT. In addition, a lookup table (LUT) can also be stored in the controller 23 .

As shown in Figure 3, it is a schematic diagram of the signal reflection intensity of the corresponding detection carrier according to the optical detection method of the present invention.

In the first embodiment, the controller 23 calculates the voltage level (also called potential) measured by the sensor 22 and uses the difference generated as the signal of each display area. For example, the reference display area A representing the reference display area A is displayed as the visualization result of the L255th grayscale (that is, representing the darkest brightness of any color). The controller 23 measures the corresponding reference display area A. A voltage level difference _is The potential of the area outside (for example, the part corresponding to X ₀ ), as shown in Figure 3, the potential on the left side of the corresponding reference display area _A is slightly higher than The second voltage level difference corresponding to any gray scale between L ₀ (that is, the lightest one representing any color) and L255 will be displayed based on the result of the object to be tested and its reaction. Both X ₂ and X ₃ are less than or equal to X ₁ , that is, X ₁ ≧X ₂ and X ₁ ≧X ₃ .

Figure 4 is a schematic structural diagram of the second embodiment of the optical detection method of the present invention.

In the second embodiment, the hardware structure used is substantially the same as that in the first embodiment, except that the detection light output by the light source 21 is the surface light 101 as shown in FIG. 3 .

Furthermore, the color of the display areas B and C to be tested after being reacted by the object to be tested and the color of the surface light 101 can be other corresponding paired complementary colors, for example, green and magenta, blue and yellow, yellow and Purple, blue and orange etc.

For this reason, the surface light 101 can increase the amount of data collected to a limited extent compared to the linear light 100, without adding too much burden to the back-end calculation or slowing down the calculation speed too much (compared to the detection light covering the entire detection). For carrier 10).

Figure 5 is a schematic flow chart of the optical detection method of the present invention. Figure 6 is a schematic diagram of the judgment procedure of the optical detection method of the present invention.

Please refer to FIGS. 1 to 6 together. The optical detection method proposed by the present invention includes steps S1 to S6, as described in detail below.

Step S1 provides a detection carrier 10 and at least one look-up table (LUT). The detection carrier 10 may include a reference display area A and a display area B and a display area C to be tested.

The detection carrier 10 is used to receive the object to be tested, and can receive it in ways such as absorbing, filling, abutting, clamping, and snapping.

Step S2 is to apply the object to be tested (not shown in the figure) to the detection carrier 10, and make the object to be tested react with the display area B and the display area C to be tested (for example, change color, gray scale, etc.).

It is worth mentioning that the sensor 22 determines the received reference signal 102 and the signal to be measured 103 based on the sensed change in voltage level (also called potential) corresponding to the gray scale value difference. , that is, the sensor 22 can receive the potential changes produced by the reflected light from the detection carrier 10 on each pixel of the sensor 22 as the reference signal 102 and the signal to be measured 103 .

The color of the detection carrier 10 used can be any color in the red system, and the color of the linear light 100 can be green or cyan that is contrasting or complementary to the red system to enhance the gray scale of the sensor 22 in each display area. Interpretation sensitivity or resolution of value difference, etc.

The color of the display areas B and C to be tested after being reacted by the object to be tested and the color of the linear light 100 can be other corresponding paired complementary colors, for example, green and magenta, blue and yellow, yellow and purple, blue and Orange etc.

Step S3 is when the light source 21 outputs the linear light 100 or 101 to the detection carrier 10, and projects the linear light 100 or 101 to the reference display area A, the display area to be tested B and the display area to be tested C.

The detection light system simultaneously contacts the reference display area A, the display area to be tested B, and the display area to be tested C, etc., to ensure that the changes within a specific time range are required, thereby eliminating the possibility of producing other biased results (for example, reaction If the time is too long, the accuracy of the color change response will decrease, etc.).

Step S4 is when the sensor 22 receives the reference signal 102 reflected from the reference display area A and the to-be-measured signals 103 reflected from the display areas B and C to be measured. The reference signal 102 includes the first grayscale value of the reference display area A, and is to be measured. The signal 103 includes the second grayscale values of the display area B and the display area C to be tested.

It is worth mentioning that step S4 further includes the following steps: using the first voltage level difference obtained by sensing the first gray scale value as the reference signal 102; and using the second voltage level difference obtained by sensing the second gray scale value. The voltage level difference serves as the signal 103 to be measured.

As shown in FIG. 3 , when the detection process is performed on the detection carrier 10 , the opposite ends of the detection carrier 10 can be supported, adhered, adsorbed or clamped by the bracket T (also called a tray). Furthermore, in the schematic diagram of signal reflection intensity shown in Figure 3, in order to focus the detailed discussion on X ₀ , X ₁ , X _{2 ,} and No restrictions on color or grayscale.

The reference signal 102 and the signal to be measured 103 are received by the sensor 22 at the same time to ensure that the changes within a specific time range are required, thereby eliminating the possibility of other biased results (for example, color change reaction caused by too long reaction time). Decreased accuracy, etc.).

In step S5, the controller 23 confirms the reference display area A and the display areas B and C to be tested through a judgment procedure, and calculates the first gray scale value and the second gray scale value to obtain a comparison value.

The first voltage level difference is greater than or equal to the second voltage level difference. Furthermore, the controller 23 uses the measured voltage level difference (which can also be called a potential difference) as the signal of each display area. For example, the reference display area A displays the visualization result of the L255th gray level (that is, the one representing the darkest brightness of any color), and the controller 23 calculates the reference signal 102 corresponding to the reference display area A measured by the sensor 22 _Finally , the first voltage level difference is obtained as The result of the reaction presents any gray scale between L ₀ (that is, the lightest one representing any color) to L255. The controller 23 calculates the reflected signal 103 to be measured and obtains the result. The obtained two second voltage level differences X ₂ and X ₃ will be less than or equal to X ₁ , that is, X ₁ ≧X ₂ and X ₁ ≧X ₃ .

It is worth mentioning that the operation may include the controller 23 dividing any second voltage level difference by the first voltage level difference and obtaining a comparison value. Moreover, the comparison value can be presented in percentage, for example, X ₁ =2, X ₂ =0.9, then the comparison value is X ₂ /X ₁ =45%.

In particular, the step S5 for confirming the reference display area A and the display areas B and C to be measured refers to identifying which one is the reference display among the multiple reflection signals of the areas to be measured transmitted by the controller 23 to the sensor 22 Area A, display area B to be tested and display area C to be tested, as shown in Figure 6, the judgment program may include the following steps: Step S11, the controller 23 receives a plurality of grayscale signals reflected from the detection carrier 10 and Perform _{calculations to} obtain multiple voltage level differences ₍ for example, including X ₀ , For example, _the part corresponding to _the voltage level difference The reference voltage level is subtracted from the voltage value of other parts (for example, white) other than the display areas (for example, A, B, C) on the detection carrier 10 to obtain the strongest signal. Intensity difference, that _{is , X 0} > _{X 1} , , the one closest to the strongest signal strength difference (i.e., X ₀ ) (for example, the part corresponding to the voltage level difference X ₁ ) is used as the reference signal ₁₀₂ ; furthermore, the voltage level difference The voltage value sensed by the controller 23 on the reference display area A is obtained by subtracting it from the voltage value of other parts (for example, white) of the detection carrier 10 other than the display areas. The voltage level difference X ₁ is, and based on the voltage level difference X ₁ being the closest to the background signal X ₀ with the maximum signal strength difference, X ₁ is used as the reference signal 102 , that is, X ₀ >X ₁ ≧X ₂ , X ₃ , and _{X 1} is _{closest to} The test signal 103; furthermore, the voltage level differences X ₂ and X ₃ are obtained by using the voltage values sensed by the controller 23 in the display area B and the display area C to be tested, and Subtract it from the voltage values of other parts (for example, white) outside the display areas on the detection carrier 10 to obtain the voltage level differences X ₂ and X ₃ , that is, X ₀ >X ₁ ≧ X ₂ , X _{3 ,} etc., and use X ₂ and X ₃ as the signals to be measured 103 .

Among them, _the advantage of using the differences in voltage levels (for example, X ₀ , X ₁ , , and further effectively subtract or eliminate unnecessary or interfering content such as noise that it may contain, so that the comparison value obtained by subsequent operations can have better reliability and reproducibility.

Furthermore, the controller 23 can confirm the position of the reference display area A on the detection carrier 10 through the direction and sequence of the reference signal 102 and the signal to be measured 103, for example, through the voltage level differences X ₁ , X ₂ , X ₃ determines that the reference signal 102 is located on the left side of all the signals to be measured 103, so the leftmost display area corresponding to the determination is the reference display area A, and the display areas B and C to be measured corresponding to the voltage level differences X ₂ and X ₃ are Sequentially on the right side of the reference display area A.

In step S6, the controller 23 reads the content corresponding to the comparison value according to the lookup table (LUT).

The look-up table (LUT) is stored in the detection module 20 in advance, and the LUT is used as a basis for interpreting the comparison value.

To sum up, the optical detection method of the present invention is to optically capture the visual results after the detection carrier 10 interacts with the object to be tested after the detection carrier 10 is applied to the object to be tested. In particular, the detection carrier 10 can A plurality of display areas are used to present the visual results, for example, a reference display area A used as a comparison standard and test display areas B and C used to interpret the test results of the object to be tested, etc. Then, the detection light can be projected to the reference display area A and the display areas to be tested B and C sequentially or simultaneously, and the reference signal 102 reflected from the reference display area A and the display to be tested can be received sequentially or simultaneously. Signals 103 to be measured in areas B and C.

It is worth mentioning that the visualization result can be a plurality of blocks of the same color or different colors containing differences in gray scale values, and the color of the detection light can be the complementary color of the reference display area A and the color relative to the display areas B and C to be tested. The complementary color (or contrasting color) of the color of each display area displayed after being reacted by the substance to be tested is used to enhance the sensitivity or resolution of the interpretation of the difference in gray scale values of each display area.

Finally, the first grayscale value and the second grayscale value are calculated to obtain a comparison value corresponding to the difference in grayscale value, and the content corresponding to the comparison value is read according to the lookup table to detect the corresponding object to be measured. result.

To this end, the optical detection method of the present invention automatically reads out the detection results corresponding to the visual detection content after performing optical projection, reflection and calculation on the visual detection content, thereby saving manpower and improving detection accuracy. purpose.

The above are only detailed descriptions and drawings of preferred specific embodiments of the present invention. However, the characteristics of the present invention are not limited thereto, nor do they limit the present invention. The entire scope of the present invention shall be subject to the following patent application scope. , all embodiments that are within the spirit of the patentable scope of the present invention and similar modifications thereof shall be included in the scope of the present invention. Anyone familiar with the art can easily think of changes or modifications in the field of the present invention. It can be covered by the following patent scope of this case.

10:Detection carrier

11: Detection shell

20:Detection module

21:Light source

22: Sensor

100: linear light

A: Reference display area

B: Display area to be tested

C: Display area to be tested

Claims (10)

An optical detection method includes: providing a detection carrier and at least one lookup table, the detection carrier includes a reference display area and at least one display area to be tested; outputting a detection light to the detection carrier, and causing the detection light to Simultaneously projecting to the reference display area and the display area to be measured during operation; receiving a reference signal reflected from the reference display area and a signal to be measured reflected from the display area to be measured and confirming the reference through a judgment procedure display area and the display area to be tested; wherein the reference signal includes a first gray scale value, and the signal to be tested includes a second gray scale value; the first gray scale value and the second gray scale value are Obtain a comparison value after an operation; and read the content corresponding to the comparison value in the lookup table according to the comparison value. The optical detection method as claimed in claim 1, wherein the detection light contacts the reference display area and the display area to be tested sequentially or simultaneously. The optical detection method as claimed in claim 1, further comprising: using a first voltage level difference obtained by sensing the first gray scale value as the reference signal; and using a first voltage level difference obtained by sensing the second gray scale value. A second voltage level difference is used as the signal to be measured; wherein the first voltage level difference is greater than or equal to the second voltage level difference. The optical detection method as claimed in claim 1, wherein the reference display area is disposed adjacent to one end of the detection carrier at the location of the detection carrier. The optical detection method as described in claim 1 or 3, wherein the judgment procedure includes: receiving a plurality of gray-scale signals reflected from the detection carrier; judging the one with the strongest signal intensity difference among the gray-scale signals, as a background signal; determine the other signals among the gray-scale signals other than the background signal, which one is closest to one of the strongest signal intensity differences, as the reference signal; and determine the background signal and the background signal among the gray-scale signals. Signals other than the reference signal are used as the signal to be measured. The optical detection method of claim 1 further includes: transmitting the reference signal and the signal to be measured to a controller, and the controller performs the operation. The optical detection method as described in claim 1, wherein the detection light is linear or flat, and covers at least part or all of the reference display area and at least part or all of the display area to be tested. all. The optical detection method as claimed in claim 1, wherein the color of the detection light is different from the colors of the reference display area and the display area to be tested. The optical detection method as claimed in claim 8, wherein the color of the detection light is the complementary color of the color of the reference display area and the color of the display area to be measured after being reacted by an object to be measured. The optical detection method as described in claim 1, wherein the lookup table is stored in a cloud server, the cloud server receives the comparison value, and compares the comparison value with the lookup table to find the corresponding comparison value content.

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