Handheld reading instrument used in cooperation with pesticide residue detection
By using a phototransistor in a handheld reader to identify color changes in the test strip, combined with a voltmeter and a WiFi module, the problem of human error in existing test strips has been solved, thus improving the accuracy of pesticide residue detection and data transmission, and expanding the application scenarios.
Patent Information
- Application Number
- CN202520075084.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing pesticide residue test strips rely on visual observation of color changes, which can easily lead to misjudgments and lacks specific prompts, affecting the accuracy of the test.
A handheld reader was designed, which combines a light signal transmitting and receiving mechanism. It identifies the color change of the test strip through a phototransistor and transmits data through a voltmeter and a WiFi module, providing digital prompts and data reading functions.
It improves the accuracy of pesticide residue detection, reduces human error, provides intuitive digital prompts and data transmission methods, and expands application scenarios.
Smart Images
Figure CN223808349U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection auxiliary equipment technical field, especially a hand -held reading instrument of pesticide residue detection matching use. BACKGROUND
[0002] Pesticide residue problems in agricultural products (such as vegetables and fruits) can endanger the health of the people, and the relevant functional management department will equip corresponding pesticide residue rapid detection instrument according to the actual situation of the local, and carry out sampling inspection to the vegetables and fruits and other products sold on the market. The pesticide residue rapid detection instrument of vegetables and fruits and other agricultural products currently applied is generally a desktop detection instrument (detecting in the laboratory), and the operation needs a special laboratory, so the detection cost is high and the detection is inconvenient, and therefore there is certain use limitation. With the development of science and technology, the existing technology has appeared test paper sheet capable of rapidly detecting organophosphorus and carbamate pesticide residues of vegetables and fruits, which is used for rapidly screening organophosphorus and carbamate pesticides with high toxicity and high residue in vegetables and fruits. During specific detection, only a few grams of vegetables and fruits are taken, soaked with extraction reagent, and then the soaking liquid is dropped on the white enzyme sheet of the test paper sheet. Through overlapping reaction with the substrate color sheet for 3 minutes, the user visually observes the color change of the white test paper sheet (light color represents more pesticide residues, and vice versa) to determine whether there is organophosphorus and carbamate pesticide in the vegetables and fruits. This detection method is widely used in agricultural markets, vegetable planting enterprises, purchasing merchants, market supervision units and the like. Due to simple operation and low detection cost, the method has a very wide popularization.
[0003] Although the existing pesticide residue test paper sheet method and the detection method of pesticide residues in vegetables and fruits meet the detection needs, there are still the following technical problems due to the structure. Specifically, there is no specific prompt function, and the user visually observes the color change of the white test paper sheet to determine whether there is organophosphorus and carbamate pesticide in the vegetables and fruits (when the pesticide residue is lower than the normal value, the test paper sheet will also change color). If the user has no experience, it is easy to cause misjudgment, which will adversely affect the pesticide residue detection of vegetables and fruits (vegetables and fruits with excessive pesticide residues will flow into the market, which will threaten the health of citizens). CONTENT OF THE UTILITY MODEL
[0004] In order to overcome the defects of the existing test paper sheet method for detecting pesticide residues due to the limitation of technology, the utility model provides a hand -held reading instrument of pesticide residue detection matching use, which can identify the test paper sheet after detection, and prompt through relatively high or relatively small numbers when the pesticide residue content detected by the test paper sheet is high or low. The user can intuitively master the relevant data, and can also read the data through the USB interface and send the relevant data detected through the WiFi data transmission module, thereby improving the accuracy of the user's judgment of pesticide residues.
[0005] The utility model solves its technical problem adopts the technical scheme of:
[0006] A pesticide residue detection supporting use hand -held reading instrument, including shell, voltage display table, singlechip module, WiFi data transmitting module, singlechip module's signal output and WiFi's signal input electric connection still have optical signal emission mechanism, receiving display mechanism, optical signal emission mechanism includes emitting diode and resistance, cylinder, spotlight bowl, the lower end of cylinder is open mode upper end is closed type structure, spotlight bowl is installed in the lower end in the cylinder, resistance and emitting diode are installed in the cylinder interior, receiving display mechanism includes phototriode and receiving display circuit, cylinder A, convex lens, the lower end of cylinder A is open mode upper end is closed type structure, convex lens is installed in the lower end in cylinder A, and phototriode is installed in the cylinder A interior, voltage display table, singlechip module, WiFi data transmitting module, receiving display circuit are installed in the shell, and one end of shell has the slot, the power output end of receiving display circuit and the signal input of singlechip module and voltage display table electric connection.
[0007] Further, the internal dimension of the slot is greater than the external dimension of the test paper sheet.
[0008] Further, the lower end of the cylinder of the optical signal emission mechanism and the lower end of the cylinder A of the receiving display mechanism are located at the upper end of the slot, respectively.
[0009] Further, the light receiving surface of the phototriode is located at the rear side of the focusing point of the convex lens, and the light emitting surface of the emitting diode is located in the light collecting port of the spotlight bowl.
[0010] Further, in the optical signal emission mechanism, the negative electrode of the emitting diode is electrically connected with the resistance.
[0011] Further, the receiving display circuit includes three resistances electrically connected and connected with the phototriode, one end of the first resistance is connected with the collector of the phototriode, the emitter of the phototriode is connected with one end of the second resistance, the other end of the second resistance is connected with one end of the third resistance.
[0012] Compared with the prior art, the utility model has the beneficial effects that: the novel cooperative pesticide residue detection test paper is used, the test paper after detection can be identified in application, under the action of light signal emission mechanism, receiving display mechanism and the like, the pesticide residue content of test paper detection is big or small, can be respectively prompted through relatively high or relatively low numbers through the voltmeter, the user can intuitively master the relevant data (reduces the error brought by single judgment of pesticide residue amount through the color of test paper by human), and still can read data through the USB interface, send the relevant data of detection through the WiFi data emission module, the application scene is more, the novel improves the pesticide residue accuracy of user judgment, has good application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model will be further explained below in combination with the drawings and examples.
[0014] Figure 1 It is the whole side view plane structure schematic diagram of the utility model.
[0015] Figure 2 , 3 It is the local structure schematic diagram of the utility model.
[0016] Figure 4 It is the circuit diagram of the utility model. DETAILED DESCRIPTION
[0017] Figure 1 , 2, 3, 4, a pesticide residue detection matching use hand-held reading instrument, including battery G1, charging socket CZ1, power switch, shell 1, liquid crystal voltage display table V, single-chip microcomputer module A1 with USB interface, WiFi data transmission module A2, signal output end of single-chip microcomputer module A1 and signal input end of WiFi data transmission module A2 are connected through wires, also have optical signal transmission mechanism, receiving display mechanism;The optical signal transmission mechanism has two identical paths, and each path of the optical signal transmission mechanism includes light-emitting diode VL and resistor R1, barrel 21, small spotlight bowl 22 (and the structure and working principle of the flashlight spotlight bowl are consistent, the focusing light acts), the lower end of the barrel 21 is open, and the upper end is a closed structure, the spotlight bowl 22 is fixedly installed in the lower end of the barrel 21, the resistor R1 and the light-emitting diode VL are installed on the circuit board, and the circuit board is fixedly installed in the middle part of the barrel 21;The receiving display mechanism includes phototriode Q1 and receiving display circuit 31, barrel A32, small double convex lens 33 (focusing light effect), the lower end of the barrel A32 is open, and the upper end is a closed structure, the convex lens 33 is fixedly installed in the lower end of the barrel A32, and the phototriode Q1 is installed on the circuit board A, and the circuit board A is fixedly installed in the middle part of the barrel A32;The battery G1, the charging socket CZ1, the power switch, the liquid crystal voltage display table V, the single-chip microcomputer module A1, the WiFi data transmission module A2, the receiving display circuit 31 are installed on the circuit board in the shell 1, the keys of the four power switches and the display surface of the display table V are located outside the upper end opening and a plurality of holes of the shell 1 respectively, the USB socket and the jack of the charging socket CZ1 are located outside the two openings at the left end of the shell 1 respectively, and the front end of the shell has a rectangular slot 101.
[0018] Figure 1 、 2 , 3, 4, the internal size of the slot 101 is slightly larger than the external size of the test paper sheet 4. The upper ends of the two barrel 21s of the optical signal transmission mechanism are spaced apart at a distance of 1 cm on both sides of the middle part of the slot 101 (the barrel is located on the lower side), and the barrel 32A of the receiving display mechanism is located between the middle parts of the two barrels 21. The light receiving surface of the phototriode Q1 is located at a position 1 mm behind the focusing point of the upper end of the convex lens 33, and the light emitting surface of the light-emitting diode VL is located in the light collecting port of the upper end of the spotlight bowl 22. In each path of the optical signal transmission mechanism, the negative electrode of the light-emitting diode VL and the resistor R1 are connected through wires. The receiving display circuit includes three resistors R2, R3 and R4 connected through the circuit board, and is connected with the phototriode Q1 through wires (leading out through the upper end opening of the barrel A).
[0019] Figure 1 ,2 , 3, 4, the battery G1 two poles and charging socket CZ1 two poles are connected by wires (when the battery G1 no electricity, you can plug the external 5V power charger into the charging socket CZ1, for charging), the positive pole of the battery G1 is connected by wires through the first power switch S1, the power input end of the second power switch S4, the other end of the positive power input end resistance R2 of the receiving display circuit, the positive power input end 1 pin of the single-chip microcomputer module A1, the power input end of the third power switch S2, the power output end of the second power switch S4, the positive power input end light emitting diode VL of the two-way optical signal transmitting mechanism, the other end of the power output end resistance R3 of the receiving display circuit, the signal input end 3 pin of the single-chip microcomputer module A1 and the positive power input end (through the fourth power switch S3 in series) of the liquid crystal voltage display table V, the power output end of the third power switch S2 and the positive power input end 1 pin of the WiFi data transmitting module A2 are connected by wires, the negative power input end 2 pin of the WiFi data transmitting module A2, the negative power input end 2 pin of the single-chip microcomputer module A1, the negative power input end of the voltage display table V, the other end of the negative power input end resistance R4 of the receiving display circuit, the other end of the negative power input end resistance R1 of the two-way optical signal transmitting mechanism are connected by wires. Figure 4 , the light emitting diode VL is a yellow light emitting diode; the phototriode Q1 model is 3DU5C; the voltage table V is a small four-bit liquid crystal direct current voltage display table (range 6V); the battery G1 is a lithium battery of type 5V / 2Ah; the resistance R1 (voltage reduction current limiting effect), R2 (voltage reduction current limiting effect), R3 (voltage division effect), R4 (voltage division effect) resistance values are 400Ω, 100Ω, 10K, 25K respectively; the single-chip microcomputer module A1 main control chip is STM8S103F3P6 (the single-chip microcomputer module receives analog signals, converts analog signals into digital signals or outputs through the USB socket, which is a very mature technology, and this application does not make superfluous repetition and does not protect the technical scheme); the WiFi data transmitting module A2 is a type HLK-B30 WiFi data transmitting module finished product (the WiFi data transmitting module A2 transmits data signals, which is a very mature technology, and this application does not make superfluous repetition and does not protect the technical scheme).
[0020] Figure 1 , 2, 3, 4, the new type of synergistic pesticide residue test paper piece uses, and the test paper piece can be identified after detection; the power switch S1 is turned on before detection, and the subsequent two-way light signal emitting mechanism, receiving and displaying mechanism, single-chip microcomputer module and the like are powered on and work, the staff inserts the test paper piece 4 after checking the pesticide residue into the slot 101, the light-emitting diode of the two-way light signal emitting mechanism is powered on and emits light, and the light-emitting diode respectively irradiates the upper end face of the test paper piece with seamless light, and the light reflected by the test paper piece 4 is focused on the light-receiving surface of the phototriode Q1 through the convex lens 33. Specifically, when the pesticide residue amount of vegetables and fruits and the like detected by the test paper piece is relatively large, the color of the test paper piece is relatively light, the absorption degree of light is relatively small, the light-receiving surface of the phototriode Q1 receives relatively high light, and the voltage signal output by the emitter of the phototriode Q1 is relatively high. When the pesticide residue amount of vegetables and fruits and the like detected by the test paper piece is relatively small, the color of the test paper piece is relatively deep, the absorption degree of light is relatively large, and thus the light-receiving surface of the phototriode Q1 receives relatively low light, and the voltage signal output by the emitter of the phototriode Q1 is relatively low. When the emitter of the phototriode Q1 outputs different voltage signals, the voltage signals are divided by the resistors R3 and R4 and input into the positive power input end of the voltmeter V and the signal input end of the single-chip microcomputer module A1. Thus, the voltmeter V displays the corresponding voltage number within the time when the staff turns on the power switch S3 (the higher the voltage, the larger the pesticide residue amount of fruits and vegetables and the like detected by the test paper piece, and vice versa). After the analog voltage signal is input into the signal input end of the single-chip microcomputer module A1, the single-chip microcomputer module A1 converts the voltage signal input with different pesticide residue amounts into a digital signal and then outputs the digital signal to the signal input end of the WiFi data transmitting module A2. The WiFi data transmitting module A2 (on the basis of turning on the power switch S2) transmits the input digital signal through a wireless way, and through the existing mature Internet of Things data receiving and transmitting technology, relevant personnel can intuitively understand the pesticide residue data of the vegetables and fruits and the like through the built-in WiFi data receiving module of the PC or mobile phone. Specifically, the user can also insert the USB plug into the USB interface of the single-chip microcomputer module A1 and the USB socket of the PC, and read the corresponding data through the PC.
[0021] Figure 1 、 2 , 3, 4, through the above, the new type can identify the test paper piece after detection, and the test paper piece can be identified after detection. When the pesticide residue content detected by the test paper piece is large or small, the voltmeter can prompt through relatively high or relatively low numbers, the user can intuitively master the relevant data (reducing the error caused by the single judgment of the pesticide residue amount by the color of the test paper piece), and the user can also read the data through the USB interface and transmit the relevant data detected through the WiFi data transmitting module. The application scenario is more, and the accuracy of the user in judging the pesticide residue is improved (the digital way intuitively prompts, and the color judgment has better accuracy).
[0022] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and for those skilled in the art, it is obvious that the present application is limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.
[0023] In addition, it should be understood that, although the present application is described in the form of an embodiment, the embodiment does not only contain one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that those skilled in the art can understand.
Claims
1. A pesticide residue detection matching hand-held reader, comprising a shell, a voltage display meter, a single-chip microcomputer module, a WiFi data transmission module, a signal output end of the single-chip microcomputer module and a signal input end of the WiFi are electrically connected, characterized in that, The application also has a light signal emitting mechanism and a receiving and displaying mechanism; the light signal emitting mechanism comprises a light emitting diode, a resistor, a cylinder and a light collecting bowl; the lower end of the cylinder is open and the upper end is closed; the light collecting bowl is installed at the lower end of the cylinder; the resistor and the light emitting diode are installed inside the cylinder; the receiving and displaying mechanism comprises a phototriode, a receiving and displaying circuit, a cylinder A and a convex lens; the lower end of the cylinder A is open and the upper end is closed; the convex lens is installed at the lower end of the cylinder A; the phototriode is installed inside the cylinder A; the voltage display table, the single-chip microcomputer module, the WiFi data transmitting module and the receiving and displaying circuit are installed in the shell; one end of the shell has a slot; the power output end of the receiving and displaying circuit is electrically connected with the signal input end of the single-chip microcomputer module and the voltage display table.
2. The kit for detecting pesticide residues according to claim 1, wherein, The internal size of the slot is larger than the external size of the test paper sheet.
3. The kit for detecting pesticide residues according to claim 1, wherein, The lower ends of the cylinder of the light signal emitting mechanism and the cylinder A of the receiving and displaying mechanism are respectively located at the upper end of the slot.
4. The kit for detecting pesticide residues according to claim 1, wherein, The light receiving surface of the phototriode is located at the rear side of the focusing point of the convex lens and the light emitting surface of the light emitting diode is located inside the light collecting port of the light collecting bowl.
5. The kit for detecting pesticide residues according to claim 1, wherein, In the light signal emitting mechanism, the negative electrode of the light emitting diode is electrically connected with the resistor.
6. The kit for detecting pesticide residues according to claim 1, wherein, The receiving and displaying circuit comprises three electrically connected resistors and is connected with the phototriode; one end of the first resistor is connected with the collector of the phototriode; the emitter of the phototriode is connected with one end of the second resistor; the other end of the second resistor is connected with one end of the third resistor.