TWI782478B - Pesticide aqueous solution optical detection device - Google Patents

Abstract

The present invention is a pesticide aqueous solution detection device, which comprises a waterproof casing with an inner space and a detection end, a display is arranged on the waterproof casing, a detection channel is formed on the detection end, an aqueous solution contains pesticides for washing vegetables and fruits and flows In the detection channel, a light source module and a sensor are arranged in the inner space of the waterproof casing, and are located at the detection end; the light source module emits a detection beam penetrating the aqueous solution into the sensor , and a spectral information is generated by the sensor; a processor is electrically connected to the light source, the sensor and the display and is arranged in the internal space; the processor processes the spectral information, and according to a processing result in the A result message is displayed on the monitor, allowing the washing person to confirm the pesticide residue status of the vegetable and fruit aqueous solution in real time.

Description

Pesticide aqueous solution optical detection device

An aqueous solution detection device, especially an optical detection device for pesticide aqueous solution.

Most of the fruits and vegetables on the market are sprayed with pesticides, and most of the pesticides cannot be identified by the innate sense of sight and smell of human beings. Regardless of whether the amount of pesticide residues is large or small, pesticides will cause different degrees of physiological damage to humans if they are eaten by humans, which also shows the importance of washing fruits and vegetables to remove pesticides.

In view of the fact that substances in the same medium will diffuse from high concentration to low concentration in order to achieve a concentration balance in the system, when washing fruits and vegetables, pesticides will also be washed from the surface of fruits and vegetables with high pesticide concentration to the surface due to water washing. The aqueous solution with low pesticide concentration diffuses in one direction, so as to achieve the balance of the concentration of pesticides in the vegetables and fruits in the washing container and the aqueous solution. Therefore, most families have the habit of washing fruits and vegetables before purchasing vegetables and fruits for cooking.

However, when washing fruits and vegetables, most people only rely on experience to determine whether the fruits and vegetables have been washed clean, and there is no scientific method for washing fruits and vegetables to ensure that the pesticides in fruits and vegetables are really washed clean.

Although there are pesticide detection devices on the market, these pesticide detection devices on the market cannot immediately inform the washers of the washing status of the vegetables and fruits in the most direct and simple way, so that the washers waste more washing time, or use As for the washing people, they are tired of using the pesticide detection device because they think it is troublesome.

For example, a pesticide detection device on the market needs to slice, mash, and squeeze fruits and vegetables first, and then use a quick screening reagent or a test piece to perform a colorimetric test to find out the concentration of the pesticide. Obviously, this complicated inspection method sacrifices the possibility of the vegetables and fruits as cooking ingredients, and is too time-consuming.

Based on the above, the pesticide detection devices on the market cannot immediately confirm the pesticide residue status of fruits and vegetables, and the detection efficiency is quite low.

In view of the above problems, the present invention provides an optical detection device for pesticide aqueous solution, which can detect the pesticide residues in the aqueous solution in the washing container in real time, improve the inspection efficiency, and reduce the trouble of the washers when washing fruits and vegetables.

In one embodiment, the optical detection device for pesticide aqueous solution includes: a waterproof case with an inner space and a detection end; a display set on the waterproof case; a detection channel formed on the detection side of the waterproof case end; a light source module, arranged in the inner space of the waterproof casing, and located at the detection end; a sensor, arranged in the inner space of the waterproof casing, and located at the detection end; a processor, installed in the internal space, and electrically connected to the light source module, the sensor and the display; wherein when the processor receives a detection activation signal, the processor activates the light source module to generate a detection light beam irradiate to the detection channel, so that the detection light passes through an aqueous solution in the detection channel; a fixing device has a locking part and a hook part; wherein the locking part of the fixing device is used for locking the waterproof casing, And the hook portion of the fixing device is for hanging on an edge of a container; wherein the sensor receives the detection light beam passing through the aqueous solution in the detection channel, and generates a spectral information according to the received detection light beam ; wherein the processor receives the spectral information, generates a result message according to the spectral information, and generates a display screen according to the result message, and transmits the display screen to the display, and the display screen displays the display screen; wherein the detection A first light-transmitting lens and a second light-transmitting lens are respectively arranged on opposite sides of the channel; Wherein the light source module and the sensor are respectively arranged on the opposite sides of the detection channel; wherein when the detection light beam is emitted from the light source module, it passes through the first light-transmitting lens and the aqueous solution in the detection channel and the second light-transmitting lens, and emit into the sensor.

In one embodiment, the optical detection device for pesticide aqueous solution includes: a waterproof case with an inner space and a detection end; a display set on the waterproof case; a detection channel formed on the detection side of the waterproof case end; a light source module, arranged in the inner space of the waterproof casing, and located at the detection end; a sensor, arranged in the inner space of the waterproof casing, and located at the detection end; a processor, installed in the internal space, and electrically connected to the light source module, the sensor and the display; wherein when the processor receives a detection activation signal, the processor activates the light source module to generate a detection light beam irradiate to the detection channel, so that the detection light passes through an aqueous solution in the detection channel; a fixing device has a locking part and a hook part; wherein the locking part of the fixing device is used for locking the waterproof casing, And the hook portion of the fixing device is for hanging on an edge of a container; wherein the sensor receives the detection light beam passing through the aqueous solution in the detection channel, and generates a spectral information according to the received detection light beam ; wherein the processor receives the spectral information, generates a result message according to the spectral information, and generates a display screen according to the result message, and transmits the display screen to the display, and the display screen displays the display screen; wherein the detection A light-transmitting lens and a reflective lens are arranged on opposite sides of the channel respectively; wherein the light source module and the sensor are both arranged on the side of the detection channel where the light-transmitting lens is provided; After the module is ejected, it passes through the light-transmitting lens and the aqueous solution in the detection channel, is reflected by the reflective lens, passes through the aqueous solution in the detection channel and the light-transmitting lens, and is emitted into the sensor.

Since the pesticide residue status of the washed fruits and vegetables will be reflected on the display screen of the display, for example, the display screen can inform the washing person of the pesticide residue status of the washed fruits and vegetables with lights such as red light, yellow light and green light.

1: Pesticide aqueous solution optical detection device

1a: charging terminal

1b: detection end

2: container

2a: Edge of container

3: Aqueous solution

10: Waterproof shell

20: Display

30: detection channel

30a: Fixer

30b: Fixer

30c: fence

40: Fixtures

40a: engagement part

40b: hook part

50: charging port

60: Power switch

61:Measuring switch

70,70': interior space

80: circuit board

100,100': light source module

150: detection beam

200: the first transparent lens

250: waterproof cover

300: the second transparent lens

400,400': sensor

500: Processor

510: Power unit

520: detection unit

530: display unit

540: input unit

200': transparent lens

300': reflective lens

L: detection channel distance

Fig. 1 is an implementation appearance diagram of the optical detection device for pesticide aqueous solution of the present invention.

Fig. 2 is an appearance view of the optical detection device for pesticide aqueous solution of the present invention.

Fig. 3 is an appearance view of a fixing device of the optical detection device for pesticide aqueous solution of the present invention.

Fig. 4 is an exploded view of the structure of the detection end of the first embodiment of the optical detection device for pesticide aqueous solution of the present invention.

5 is a cross-sectional view of a detection channel of the first embodiment of the optical detection device for aqueous pesticide solution of the present invention.

Fig. 6 is a schematic diagram of the detection channel of the first embodiment of the optical detection device for aqueous pesticide solution of the present invention.

Fig. 7 is a system block diagram of the optical detection device for pesticide aqueous solution of the present invention.

Fig. 8 is a cross-sectional view of the detection channel of a second embodiment of the optical detection device for aqueous pesticide solution of the present invention.

9 is a schematic diagram of the detection channel of the second embodiment of the optical detection device for pesticide aqueous solution of the present invention.

Fig. 10 is a schematic diagram of the corresponding absorption spectrum of the present invention.

Figure 11 is the absorption spectrum of the pesticide tiaclyl.

Figure 12 is the absorption spectrum of the pesticide fipronil.

Fig. 13 is an absorption spectrum diagram of the pesticide Palipofen.

As shown in Figure 1, the present invention is a kind of pesticide aqueous solution optical detection device 1, when this pesticide aqueous solution optical detection device 1 is used, must be arranged in a container 2, and this container 2 can be any bucket for washing fruits and vegetables, in order to pass through An aqueous solution 3 rinses the fruits and vegetables in the container 2 to dilute the residual pesticides on the skins of the fruits and vegetables. This aqueous solution 3 is tap water under normal conditions. The aqueous solution 3 will be continuously injected into the container 2 to flush the residual pesticides attached to the skins of multiple fruits and vegetables in the container 2, and the aqueous solution 3 will fill the container 2 and overflow, so that the aqueous solution 3 in the container 2 A pesticide residue concentration is continuously diluted. During the process of diluting the residual pesticides on the skins of fruits and vegetables, the optical detection device 1 for the aqueous solution of pesticides of the present invention will continuously detect the residual concentration of pesticides in the aqueous solution, and inform the washers of the pesticide residues in the washed vegetables and fruits in the most immediate and direct way .

Please also refer to FIG. 2 , the optical detection device 1 of the pesticide aqueous solution of the present invention includes a waterproof casing 10 , a display 20 and a detection channel 30 in appearance. The waterproof case 10 has an inner space 70 and a detection end 1b, wherein the detection end 1b is submerged in the aqueous solution 3 , and the waterproof case 10 protects the inner space 70 from the aqueous solution 3 entering water. The display 30 is disposed on the waterproof case 10 , and the detection channel 30 is disposed at the detection end of the waterproof case 10 .

As shown in FIG. 3 , the pesticide aqueous solution optical detection device 1 of the present invention further includes a fixing device 40 . The fixing device 40 has an engaging portion 40a and a hook portion 40b, wherein the engaging portion 40a of the fixing device 40 is used for engaging the waterproof casing 10, and the hook portion 40b of the fixing device 40 is used for hanging On an edge 2a of the container 2, no matter how large the volume of the container 2 is, the pesticide aqueous solution optical detection device 1 can be fixed on the edge 2a, which is convenient for the washing person to take and refer to the status of the washed fruits and vegetables.

Please also refer to Figures 4, 5, 6 and 7. After decomposing the detection end 1b structure of the present invention, in the first embodiment, the pesticide aqueous solution optical detection device 1 of the present invention further includes a light source module Group 100 and a sensor 400. The light source module 100 and the sensor 400 are respectively disposed on opposite sides of the detection channel 30 of the detection end 1 b and disposed on at least one circuit board 80 in the inner space 70 . The detection channel 30 is formed in a door shape on the detection end 1b of the waterproof casing 10 , and opposite sides of the detection channel 30 are respectively provided with a first transparent lens 200 and a second transparent lens 300 . A waterproof cover 250 is provided between the aqueous solution 3 and the first transparent lens 200, and the waterproof cover 250 is also provided between the aqueous solution 3 and the second transparent lens 300 to prevent the aqueous solution 3 from flowing into the inner space. 70 in. In addition, the light source module 100 and the sensor 400 are disposed beside the first transparent lens 200 and the second transparent lens 300 respectively. A processor 500 is disposed on the at least one circuit board 80 in the inner space 70 , and the processor 500 is electrically connected to the light source module 100 , the sensor 400 and the display 20 .

As shown in the system block diagram in Figure 7, the processor 500 of the pesticide aqueous solution optical detection device 1 is a computing control unit, for example, the computing control unit is a central processing unit (Central Processing Unit; CPU) or a microprocessor A controller unit (Microcontroller Unit; MCU) is disposed on the at least one circuit board 80 . The processor 500 is connected to a power unit 510 responsible for supplying power, a detection unit 520 responsible for detecting the aqueous solution 3 , a display unit 530 responsible for displaying the status of the optical detection device 1 for the pesticide aqueous solution, and an input unit 540 responsible for receiving input. The processor 500 controls the overall operation of the pesticide aqueous solution optical detection device 1 , and the power unit 510 is responsible for outputting power to the pesticide aqueous solution optical detection device 1 . The detection unit 520 includes the light source module 100 and the sensor 400 , the detection unit 520 measures the aqueous solution 3 and returns a spectral information to the processor 500 for processing. The input unit 540 includes a power switch 60 and a measurement switch 61. When the power switch 60 generates a power-on signal, the power unit 510 outputs power to the processor 500 to start the processor 500. The display unit 530 includes the display 20 , and when the processor 500 detects a detection start signal generated by the measurement switch 61 , the processor 500 controls the operation of the detection unit 520 and the display unit 530 .

When the processor 500 receives the detection activation signal, the processor 500 activates the light source module 100 to generate a detection beam 150 to irradiate the detection channel 30, when the detection beam 150 is emitted from the light source module 100 , is emitted into the sensor 400 after passing through the first transparent lens 200 , the aqueous solution 3 in the detection channel 30 and the second transparent lens 300 . The sensor 400 then generates the spectral information according to the received detection light beam 150, and the processor 500 receives the spectral information, generates a result message according to the spectral information, and generates a display screen according to the result message, and The display frame is transmitted to the display 20 , and the display frame is displayed by the display 20 .

In detail, the detection channel 30 is composed of a holder 30a, a holder 30b and a fence 30c. The fixer 30a and the fixer 30b are combined to form the door-shaped detection channel 30, and the barrier 30c is detachably arranged between a detection channel distance L in the detection channel 30 to initially filter the aqueous solution 3, The branches and leaves of vegetables and fruits will not block or scratch the first transparent lens 200 or the second transparent lens 300 .

In the first embodiment, the fixer 30a is used to fix the light source module 100 and the first transparent lens 200, so that the light source module 100 and the first transparent lens 200 are closely combined, and the fixer 30b It is used to fix the sensor 400 and the second light-transmitting lens 300 , and also make the sensor 400 and the second light-transmitting lens 300 tightly combined. The advantage of compacting these components is that the light can reduce the chance of passing through different media when traveling, so as to simplify the complexity of the optical path. That is to say, try to make the optical path of the detection beam 150 only include the medium of the first transparent lens 200 , the aqueous solution 3 and the second transparent lens 300 , without the medium of air. Furthermore, the advantage of compacting these components is that the detection beam 150 can be vertically incident on the first light-transmitting lens 200 and the second light-transmitting lens 300, so that the detection beam 150 will not be refracted due to non-perpendicular incidence, Lose part of the light intensity.

Theoretically, if the sensor 400 can receive more light intensity of the detection light beam 150 , the accuracy of analyzing the pesticide residue concentration in the aqueous solution 3 will be more accurate. Therefore, directing the detection light beam 150 of the present invention into the sensor 400 will be a more effective method for analyzing the pesticide concentration.

In the first embodiment, the pesticide aqueous solution optical detection device 1 further includes a plurality of charging ports 50, which are arranged on a charging end 1a of the waterproof case, and the detection end 1b of the waterproof case 10 is opposite to the charging end 1a, That is, the detection terminal 1 b and the charging terminal 1 a are opposite ends of the waterproof case 10 . That is to say, the pesticide aqueous solution optical detection device 1 in the first embodiment can be charged while measuring the aqueous solution 3, and because the detection end 1b needs to be submerged in the aqueous solution 3 during detection, but because the charging end 1a is opposite to the detecting end 1b, so the charging end 1b will not be submerged in the aqueous solution 3 and will be higher than the level of the aqueous solution 3 . In detail, because the engaging portion 40a of the fixing device 40 is engaged The position of the waterproof case 10 is lower than the position of the charging end 1a and higher than the position of the detection end 1b. The fixing device 40 is hung on the edge of the container 2 , and when the aqueous solution 3 is full of the container 2 , the horizontal plane of the aqueous solution 3 is the opening periphery of the container 2 . Therefore, the position of the charging end 1 a is higher than the level of the aqueous solution 3 of the container 2 . That is to say, when the aqueous solution 3 fills the container 2, the charging end 1a will not be submerged in the aqueous solution 3, but can be charged while measuring.

The spectral information records the wavelength and light intensity of the detection beam. The sensor 400 can select sensors capable of sensing different wavelength ranges according to requirements.

In the first embodiment of the present invention, the power switch 60 and the measurement switch 61 are additionally arranged on the waterproof casing 10. The power switch 60 and the measurement switch 61 are waterproof switches in the first embodiment, so they can The waterproof casing 10 prevents the aqueous solution 3 from flowing into the inner space 70 . The significance of setting the power switch 60 and the measurement switch 61 is that the washing person can turn on the pesticide aqueous solution optical detection device 1 through the power switch 60, and can start the pesticide aqueous solution optical detection device 1 through the measurement switch 61 to start measuring . For example, when the power switch 60 is pressed by the washing person, the power switch 60 generates the start signal, so that the processor 500 is turned on. And when the measurement switch 61 is pressed by the washing person, the measurement switch 61 will generate the detection activation signal, and when the processor 500 detects the detection activation signal, the light source module 100 and the sensing The device 400 starts to continuously detect the aqueous solution 3, and continuously detects the pesticide residue concentration of the aqueous solution 3 until the power switch 60 or the measurement switch 61 is turned off, or continuously detects the pesticide residue in the aqueous solution 3 The detection will not be stopped until the pesticide residue concentration is lower than a safe value. Since the present invention starts to detect the aqueous solution 3 uninterruptedly after the washing person presses the measuring switch 61, it can save power, and can also reduce the use time of the light source module 100 and the sensor 400, prolonging the The service life of the light source module 100 and the sensor 400 .

8 and 9, different from the detection channel 30 of the first embodiment, in a second embodiment of the present invention, the opposite sides of the detection channel 30 are respectively provided with a transparent lens 200' and a Reflective lens 300', wherein the light source module 100' and the sensor 400' are both arranged in the detection channel 30 On the at least one circuit board 80 on one side of the transparent lens 200'. After the detection beam 150 is emitted from the light source module 100 ′, it passes through the transparent lens 200 ′ and the aqueous solution 3 in the detection channel 30 , is reflected by the reflective lens 300 ′, and then passes through the detection channel 30 After the aqueous solution 3 and the transparent lens 200' are emitted into the sensor 400'. In this way, the travel of the detection light beam 150 passing through the aqueous solution 3 will be extended, further improving detection accuracy.

When the processor 500 receives the spectral information, the processor 500 will generate a light beam absorptivity according to the spectral information, and the processor 500 is provided with a first threshold and a second threshold, and the second threshold is high at the first threshold. The first threshold and the second threshold will be used as standards for subsequent determination of the pesticide aqueous solution. The determination is as follows: when the processor 500 determines that the light beam absorption rate is higher than the second threshold, it means that the pesticide concentration exceeds the standard, and the display screen generated by the processor 500 is a red light; when the processor 500 determines that the light beam absorbs When the rate is between the first threshold and the second threshold, it means that the pesticide concentration has decreased but still exceeds the standard, and the display picture generated by the processor 500 is a yellow light; when the processor 500 determines that the light beam absorption rate When it is lower than the first threshold, it means that the pesticide concentration is within the acceptable range, and the display frame generated by the processor 500 is a green light.

In the first embodiment and the second embodiment, the light source module 100, 100' includes a first light source and a second light source, wherein the first light source generates and emits a light beam of a first wavelength, and the first The light wavelength of the wavelength light beam is 260nm, and the second light source generates and emits a second wavelength light beam, and the light wavelength of the second wavelength light beam is 365nm. Specifically, the detection beam 150 includes the first wavelength beam and the second wavelength beam, and the spectral information includes a first spectral information and a second spectral information. When the sensor 400, 400' receives the detection light beam 150 after passing through the aqueous solution 3 in the detection channel 30, the sensor 400, 400' generates the first spectral information according to the received first wavelength light beam , and generate the second spectral information according to the received light beam of the second wavelength. Then, when the processor 500 receives the first spectral information and the second spectral information, the processor 500 will further A first wavelength beam absorptivity is generated, and a second wavelength beam absorptivity is generated according to the second spectral information.

At this time, the processor 500 sets the first threshold as a basis for determining the absorptivity of the first wavelength light beam. The determination is as follows: when the processor 500 determines that the absorption rate of the first wavelength beam is higher than the first threshold, and the second wavelength beam absorption rate is lower than the first wavelength beam absorption rate, the result message generated by the processor 500 is a pesticide residue message; when the processor 500 determines that the first wavelength beam absorption rate is higher than the first threshold, and the second wavelength beam absorption rate is higher than the first wavelength beam absorption rate, the processor 500 The result message generated is a message of coexistence of pesticide residues and impurities; and when the processor 500 determines that the absorptivity of the first wavelength beam is lower than the first threshold, and the absorptivity of the second wavelength beam is higher than the first wavelength beam Absorption rate, the result message generated by the processor 500 is a message of impurity and no pesticide residue.

In other words, the first wavelength light beam is used to detect the pesticide concentration, and the second wavelength light beam is used to detect the impurity concentration. When the first wavelength beam absorptivity is higher than the first threshold, it means that the pesticide residue concentration in the aqueous solution 3 has exceeded the standard concentration; when the first wavelength beam absorptivity is lower than the first threshold, it means that the The pesticide residue concentration in aqueous solution 3 did not exceed the standard concentration. In addition, when the absorptivity of the second wavelength beam is higher than the absorptivity of the first wavelength beam, it means that there are impurities exceeding the standard concentration in the pesticide aqueous solution, and because the impurities block the second wavelength beam, resulting in the sensitive The light beam of the second wavelength received by the detector 400 is less, so that the absorptivity of the light beam of the second wavelength is higher than the absorptivity of the light beam of the first wavelength. And when the second wavelength light beam absorptivity is lower than the first wavelength light beam absorptivity, it means that there is no impurity exceeding the standard concentration in the aqueous solution 3 . The criteria for judging the concentration of pesticides and non-pesticide impurities can be adjusted between the first embodiment and the second embodiment.

In addition, when the result message generated by the processor 500 is the message of coexistence of pesticide residues and impurities or the message of presence of impurities and no pesticide residues, the display screen generated by the processor 500 is an abnormal screen for explaining that the pesticide The aqueous solution is too cloudy to measure accurately.

Furthermore, when the second wavelength beam absorptivity is lower than the first wavelength beam absorptivity, it means that there are fewer impurities in the aqueous solution 3, so the processor 500 further determines whether the first wavelength beam absorptivity is lower than The first threshold is to determine whether the absorptivity of the first wavelength beam is between the first threshold and the second threshold, or to determine whether the absorptivity of the first wavelength beam is higher than the second threshold. The determination is as follows: when the processor 500 determines that the absorption rate of the first wavelength light beam is higher than the second threshold, it means that the pesticide concentration exceeds the standard, and the display screen generated by the processor 500 is a red light; when the processor 500 determines that When the absorptivity of the first wavelength light beam is between the first threshold and the second threshold, it means that the pesticide concentration is reduced but still exceeds the standard, and the display picture generated by the processor 500 is a yellow light; when the processor 500 When the 500 determines that the absorptivity of the first wavelength light beam is lower than the first threshold, it means that the pesticide concentration is within an acceptable range, and the display frame generated by the processor 500 is a green light.

For example, when the measurement switch 61 is pressed by the washing person, the measurement switch 61 generates the detection start signal, so that the processor 500 controls the light source module 100 and the sensor 400 to start continuously detecting the aqueous solution 3. When the washer starts to wash the fruits and vegetables, the pesticide residue concentration in the aqueous solution 3 is the highest, which will make the first wavelength beam absorption rate higher than the second threshold value, so the display screen is a red light. And when the washer sees that the red light is displayed on the display, it means that the fruits and vegetables are still being washed continuously. And as the washers continue to clean the fruits and vegetables, the pesticide residue concentration in the aqueous solution 3 will continue to decrease. When between the first thresholds, the display screen is a yellow light, which means that the pesticide concentration in the aqueous solution 3 has decreased but still exceeds the standard, and the washers still need to continue washing fruits and vegetables. And when the pesticide residue concentration in this aqueous solution 3 continues to decline, cause this When the absorptivity of the first wavelength light beam is lower than the first threshold, the display screen is a green light, indicating that the pesticide concentration in the aqueous solution 3 is within a safe range, and the washer can finish washing the fruits and vegetables.

In this preferred embodiment of the present invention, the pesticide aqueous solution optical detection device 1 uses the detection method of absorption spectrum. The detection method of the so-called absorption spectrum means that when the first light source and the second light source emit the first wavelength light beam and the second wavelength light beam, the sensor can be compared according to the first spectral information and the second spectral information The light absorption rate measured at 400 is used to deduce the physical phenomenon that occurs during the traveling process of the first wavelength light beam and the second wavelength light beam. Assuming that the sensor 400 measures 60% of the light intensity of the first light source, it means that the first wavelength beam is absorbed by 40% of the light intensity during its travel, that is, the first wavelength beam is at 260nm 40% light absorption rate at the wavelength. With the increase of pesticide concentration and the change of non-pesticide impurities in the water, the standard of pesticide concentration in addition to the light absorption rate can be defined for the measurement of pesticide aqueous solution.

As shown in the schematic diagram of the absorption spectrum in Figure 10, the light source module 100 emits the detection beam 150, and the detection beam 150 undergoes a medium conversion, and part of the light intensity is absorbed by the object to be measured in the new medium, and in The medium in the present invention is the aqueous solution 3 . After passing through the aqueous solution 3, the light beam of the first wavelength passes through the sensor to know how much light is absorbed by the pesticide aqueous solution. The distance L of the detection channel of the present invention must be maintained at a consistent distance before and after the measurement, so that the measured light absorptivity has the same control variable as before the measurement, reducing uncontrollable factors in the measurement process, and improving the quantity. Measured accuracy.

Different substances have different absorption spectra, that is, different substances have been identified by scientists to absorb light wave bands and absorptivity of each substance. The application of the absorption spectrum of the present invention is to classify the absorption spectrum data of a plurality of different pesticides into a total pesticide absorption spectrum data, that is, to find out the common points of the absorption spectrum data of these different pesticides, and to find out the characteristics of the absorption rate of several bands. After finding out the wavelength band of the absorptivity feature, the first light source and the second light source have the wavelength of the band, so as to facilitate the analysis of the pesticide concentration in the aqueous solution 3 .

As shown in Figure 11, Figure 12 and Figure 13, for example, three different kinds of pesticides have different absorption spectra in the aqueous solution ratio of 1 pesticide amount: 5000 water amount, but there are also similar absorption spectrum data in common point.

FIG. 11 is the absorption spectrum of the pesticide Difenoconazole, which has a peak at a wavelength of 194.683 nanometers (nm). From a wavelength of about 175nm to a wavelength of about 250nm, the absorptivity of the pesticide diacryl is higher than 10%, and from a wavelength of about 250nm to a wavelength of about 275nm, the absorptivity of the pesticide diacryl is maintained at about 10%.

Fig. 12 is an absorption spectrum diagram of the pesticide Fipronil, and there is a highest peak at a wavelength of 197.975nm. From the wavelength of about 180nm to the wavelength of about 277.648nm, the absorption rate of the pesticide fipronil is higher than 30%.

Fig. 13 is the absorption spectrum of the pesticide Pyriproxifen, and there is a highest peak at a wavelength of 194.346nm. From a wavelength of about 190nm to a wavelength of about 217.749nm, the absorption rate of the pesticide Palipofen is higher than 80%, while from a wavelength of about 250nm to a wavelength of about 269.614nm, the absorption rate of the pesticide Both remained above about 20%.

With comprehensive reference to the absorption spectrum diagrams of the pesticide diacryl, the pesticide fipronil and the pesticide palipifen in Fig. 11, Fig. 12 and Fig. 13, the first light source of 260nm selected by the present invention can see the absorption of 10% of the pesticide diacryl rate, the absorption rate of the pesticide fipronil was higher than 30%, and the absorption rate of the pesticide paliprefen was higher than about 20%. That is to say, no matter which kind of pesticide is in the aqueous solution, the light source 100 with a wavelength of 260 nm can see at least 10% pesticide absorption rate.

In this embodiment, the aqueous solution absorption spectrum data of the pesticides tiaclyl, the pesticide fipronil and the pesticide palipifene are only part of the reference data of the present invention, and are only used as examples for reference.

The physical changes utilized in the present invention are not limited to absorption spectra, and the optical detection device for the pesticide aqueous solution of the present invention can also use fluorescence spectroscopy or Raman spectroscopy (Raman Spectroscopy) and other light measurement methods to measure the Pesticide concentration in aqueous solution 3. That is to say, the light source module 100 can be an LED light source module with a specific wavelength, a fluorescent light source module, an ultraviolet light source module or an infrared light source module.

1: Pesticide aqueous solution optical detection device 2: container 2a: Edge of container 3: Aqueous solution 10: Waterproof shell 20: Display 30: detection channel 40: Fixtures 50: charging port 60: Power switch 61:Measuring switch

Claims (8)

An optical detection device for a pesticide aqueous solution, comprising: a waterproof casing with an inner space and a detection end; a display set on the waterproof casing; a detection channel formed at the detection end of the waterproof casing; a light source module , arranged in the inner space of the waterproof casing, and located at the detection end; a sensor, arranged in the inner space of the waterproof casing, and located at the detection end; a processor, arranged in the inner space , and electrically connect the light source module, the sensor, and the display; wherein when the processor receives a detection activation signal, the processor activates the light source module to generate a detection light beam directed toward the detection channel, Make the detection light pass through an aqueous solution in the detection channel; wherein the sensor receives the detection light beam passing through the aqueous solution in the detection channel, and generates a spectral information according to the received detection light beam; wherein the processor receives The spectral information, and generate a result message according to the spectral information, and generate a display screen according to the result message, and transmit the display screen to the display, and the display screen displays the display screen; a fixing device has a locking part and a hook portion; wherein the engaging portion of the fixing device is used to engage the waterproof casing, and the hook portion of the fixing device is used to hang on an edge of a container; wherein the opposite sides of the detection channel are respectively A first light-transmitting lens and a second light-transmitting lens are provided; wherein the light source module and the sensor are respectively arranged on opposite sides of the detection channel; wherein when the detection beam is emitted from the light source module, it is After passing through the first transparent lens, the aqueous solution in the detection channel and the second transparent lens, it is emitted into the sensor. The pesticide aqueous solution optical detection device as described in claim 1 further includes: a plurality of charging ports arranged on a charging end of the waterproof case, and the detection end of the waterproof case is opposite to the charging end. An optical detection device for a pesticide aqueous solution, comprising: a waterproof casing with an inner space and a detection end; a display set on the waterproof casing; a detection channel formed at the detection end of the waterproof casing; a light source module , arranged in the inner space of the waterproof casing, and located at the detection end; a sensor, arranged in the inner space of the waterproof casing, and located at the detection end; a processor, arranged in the inner space , and electrically connect the light source module, the sensor, and the display; wherein when the processor receives a detection activation signal, the processor activates the light source module to generate a detection light beam directed toward the detection channel, Make the detection light pass through an aqueous solution in the detection channel; wherein the sensor receives the detection light beam passing through the aqueous solution in the detection channel, and generates a spectral information according to the received detection light beam; wherein the processor receives The spectral information, and generate a result message according to the spectral information, and generate a display screen according to the result message, and transmit the display screen to the display, and the display screen displays the display screen; a fixing device has a locking part and a hook portion; wherein the engaging portion of the fixing device is used to engage the waterproof casing, and the hook portion of the fixing device is used to hang on an edge of a container; wherein the opposite sides of the detection channel are respectively A light-transmitting lens and a reflective lens are provided; wherein the light source module and the sensor are both arranged on the side of the detection channel where the light-transmitting lens is provided; wherein when the detection beam is emitted from the light source module, it is After passing through the transparent lens and the aqueous solution in the detection channel, it is reflected by the reflective lens, and then is emitted into the sensor after passing through the aqueous solution in the detection channel and the transparent lens. The pesticide aqueous solution optical detection device as described in claim 3, wherein the light source module includes: a first light source that generates and emits a light beam of a first wavelength; a second light source that generates and emits a light beam of a second wavelength; Wherein the detection beam includes the first wavelength beam and the second wavelength beam; wherein the spectral information includes a first spectral information and a second spectral information; wherein when the sensor receives the aqueous solution passing through the detection channel When the detection light beam is detected, the sensor generates the first spectral information according to the received light beam of the first wavelength, and generates the second spectral information according to the received light beam of the second wavelength; wherein when the processor receives When the first spectral information and the second spectral information are used, the processor generates a first wavelength light beam absorptivity according to the first spectral information, and generates a second wavelength light beam absorptivity according to the second spectral information; wherein when the When the processor determines that the absorptivity of the first wavelength beam is higher than a first threshold, and the absorptivity of the second wavelength beam is lower than the absorptivity of the first wavelength beam, the result message generated by the processor is a pesticide residue message; Wherein when the processor determines that the absorptivity of the first wavelength beam is higher than the first threshold, and the absorptivity of the second wavelength beam is higher than the absorptivity of the first wavelength beam, the result message generated by the processor is that there is a pesticide Residual and impurity coexistence information; wherein when the processor determines that the first wavelength beam absorption rate is lower than the first threshold, and the second wavelength beam absorption rate is higher than the first wavelength beam absorption rate, the processor generates The result message is a message that there are impurities and no pesticide residues. The pesticide aqueous solution optical detection device according to claim 4, wherein when the processor determines that the light beam absorption rate of the first wavelength is higher than the first threshold, and the light beam absorption rate of the second wavelength is lower than the light beam absorption rate of the first wavelength rate, the processor further determines whether the first wavelength beam absorption rate is between the first threshold and a second threshold, or determines whether the first wavelength beam absorption rate is higher than the second threshold; wherein the first The second threshold is higher than the first threshold; when the processor determines that the absorption rate of the first wavelength light beam is higher than the second threshold, the display screen generated by the processor is a red light; When the processor determines that the light beam absorption rate of the first wavelength is between the first threshold and the second threshold, the display screen generated by the processor is a yellow light; wherein when the processor determines that the first wavelength When the beam absorptivity is lower than the first threshold, the display frame generated by the processor is a green light. The pesticide aqueous solution optical detection device as described in claim 4, wherein when the result message generated by the processor is the message of coexistence of pesticide residues and impurities or the message of presence of impurities and no pesticide residues, the display generated by the processor The screen is an abnormal screen. The pesticide aqueous solution optical detection device as described in claim 3, wherein when the processor receives the spectral information, the processor generates a light beam absorptivity according to the spectral information; wherein the processor is provided with a first threshold and a a second threshold, and the second threshold is higher than the first threshold; when the processor determines that the light beam absorption rate is higher than a second threshold, the display screen generated by the processor is a red light; when the processor When it is determined that the light beam absorptivity is between the first threshold and the second threshold, the display screen generated by the processor is a yellow light; when the processor determines that the light beam absorptivity is lower than the first threshold, The display frame generated by the processor is a green light. The pesticide aqueous optical detection device as described in claim 3, wherein the waterproof casing is further provided with a measurement switch; wherein, when the measurement switch is activated, the measurement switch generates the detection activation signal and transmits the detection activation signal to the processor.

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