CN217359624U

CN217359624U - Inside detecting system of pesticide residue detector

Info

Publication number: CN217359624U
Application number: CN202221153185.6U
Authority: CN
Inventors: 郭文川; 杨甲鸿; 罗家宁; 朱新华
Original assignee: Northwest A&F University
Current assignee: Northwest A&F University
Priority date: 2022-05-14
Filing date: 2022-05-14
Publication date: 2022-09-02
Anticipated expiration: 2032-05-14

Abstract

The utility model relates to an inside detecting system of pesticide residue detector belongs to pesticide residue detection area. The technical problem solved is to provide a pesticide residue detector internal detection system which has simple and compact structure, good detection stability and can be adapted to various detector shells. The composition structure comprises a control processing module and at least two independent pesticide residue detector internal detection units, the composition and the structure of the pesticide residue detector internal detection units are completely the same, and each detection unit comprises a cuvette seat, a light source module and a photoelectric sensing module; a cuvette groove is arranged in the cuvette seat; a light source module opening and a photoelectric sensing module opening are respectively formed in two sides of the cell seat; the bottom of the cuvette seat is provided with a clamping groove for fixing. The utility model discloses a but light source module and photoelectric sensing module direct mount are on the cell seat, and the integrated level is high, provides inside detecting system reference for designing the pesticide residue detector.

Description

Inside detecting system of pesticide residue detector

Technical Field

The utility model belongs to pesticide residue detection area, concretely relates to inside detecting system of pesticide residue detector.

Background

In recent years, the phenomenon that pesticide residues in agricultural products such as vegetables and fruits exceed standards is serious, and in order to ensure the edible safety of the agricultural products, it is important to adopt a timely, effective and rapid detection method to supervise the quality safety of the agricultural products.

By utilizing the principle that organophosphorus and carbamate pesticides have inhibition effect on acetylcholinesterase in animal bodies, an agricultural product sample extracting solution (containing water in a sample) is added into a coexisting system of acetylcholinesterase and a substrate (acetylcholine), if the sample does not contain the organophosphorus or carbamate pesticides, the activity of enzyme is not inhibited, the acetylcholine is hydrolyzed by enzyme, and a hydrolysate reacts with an added color developing agent to generate color; on the other hand, if the sample extract contains a certain amount of organic phosphorus or a carbamate pesticide, the enzyme activity is inhibited, and the substrate added to the sample cannot be hydrolyzed by the enzyme, so that no color is developed. And measuring the absorbance value by using a spectrophotometer, and calculating the inhibition rate to judge the pesticide residue in the sample.

The invention discloses a pesticide residue detector named as 'a pesticide residue detector' in China patent publication No. CN108458991A, published 2018, 08 and 28.A detection system part of the detector uses a lampshade as a light source module, six LED lamps are uniformly arranged on the inner wall of the lampshade, convex lenses are arranged at the bottoms of the LED lamps, and a photoelectric detector is arranged at the bottom of each convex lens. In the method, six LED lamps on the lamp shade are matched with the convex lens for detection, and the convex lens can generate deviation or damage after vibration to influence a detection result, so that the problems of complex structure and poor detection stability of a detection system exist.

The invention discloses a pesticide residue detector named as 'a pesticide residue detector' according to China patent publication No. CN206862901U, published 2018, 01 and 19, and the application discloses a pesticide residue detector which comprises a shell, a sample chamber and internal components, wherein the sample chamber is provided with a cuvette, a sliding cover, a temperature controller and a stepping motor, the detection system part of the detector fixedly connects the precession end of the stepping motor with the sample chamber, the temperature controller is positioned above the sample chamber, the sliding cover is positioned above the sample chamber, and the sliding cover is in sliding connection with the shell. The internal detection system adopted in the method is closely connected with the detector shell, and cannot be separated from the shell for detection, so that the method is not convenient to adapt to other shells.

To sum up, the inside detecting system of current pesticide residue detector has the problem that the structure is complicated, detect poor stability, be not convenient for the other casings of adaptation.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a but inside detecting system of pesticide residue detector of the multiple detector casing of simple structure compactness, detection stability are good, adaptation.

The utility model discloses a realize through following structure:

the pesticide residue detector internal detection system comprises a control processing module and at least two independent pesticide residue detector internal detection units, wherein the pesticide residue detector internal detection units are completely identical in composition and structure, and each detection unit comprises a cuvette seat, a light source module and a photoelectric sensing module; a cuvette groove is arranged in the cuvette seat; a light source module opening and a photoelectric sensing module opening are respectively formed in two sides of the cell seat; the bottom of the cuvette seat is provided with a clamping groove for fixing.

The overall appearance structure of the cuvette seat is a cuboid, a cuvette groove is formed in the middle for placing a cuvette, and a shell of the cuvette seat is made of a light-tight material; the light source module is embedded into the opening of the light source module, a light source on the light source module adopts a light emitting diode, the wavelength range is 390 and 430 nm, and the light emitting surface is rectangular; the photoelectric sensing module is embedded into the opening of the photoelectric sensing module, a sensor on the photoelectric sensing module is a photoelectric sensor, and the light sensing surface is rectangular; the opening of the light source module and the opening of the photoelectric sensing module are respectively arranged at two opposite sides of the cuvette seat, and the opening of the light source module and the opening of the photoelectric sensing module are connected by an unshielded light path; the clamping groove is a groove with a rectangular cross section.

The light source module sends light and shines on the photoelectric sensing module through the detection solution in the cell, and the photoelectric sensing module can be with light signal conversion for the signal of telecommunication, and control processing module obtains the testing result after handling.

And the internal detection unit of one pesticide residue detector is used for acquiring the optical information of the control sample, and the internal detection units of the other pesticide residue detectors are used for acquiring the optical information of the experimental sample.

The light source module and the photoelectric sensing module can be tightly and fixedly arranged on the cuvette seat to form a relatively independent and compact detection structure.

The control processing module integrates a lithium battery charging and discharging booster circuit and a light source driving circuit.

Compared with the prior art, the utility model has the advantages of:

(1) the internal detection system of the pesticide residue detector is relatively independent and can be adapted to various detector shells;

(2) the light source module and the photoelectric sensing module can be fixedly installed on the cuvette seat, and are high in integration level, good in detection stability and simple and compact in overall structure.

Drawings

FIG. 1 is a schematic view of the overall structure of the internal detection system of the pesticide residue detector of the present invention;

FIG. 2 is a schematic view of the internal detection unit of the pesticide residue detector of the present invention;

FIG. 3 is a schematic view of the back structure of the cuvette holder according to the present invention;

fig. 4 is a structural diagram of a light source module of the present invention;

fig. 5 is a structural diagram of the photoelectric sensing module of the present invention;

FIG. 6 is a block diagram of the detection flow structure of the internal detection system of the pesticide residue detector of the present invention;

description of reference numerals:

1. a cuvette holder; 2. a light source module; 3. a photoelectric sensing module; 4. a control processing module; 5. a cuvette trough; 6. opening a hole in the photoelectric sensing module; 7. opening a hole in the light source module; 8. a card slot; 9. a light emitting diode; 10. 2 pin holes; 11. a photosensor; 12. 5 pin arranging holes; 13. a chip capacitor; 14. a voltage regulator; 15. and (4) a chip resistor.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, firstly, a light source module (2) is embedded into a light source module opening (7), a photoelectric sensing module (3) is embedded into a photoelectric sensing module opening (6), a cuvette seat (1) is fixed by a fixing clamping groove (8), after a contrast sample solution to be measured is extracted, the contrast sample solution to be measured is poured into an empty cuvette, and then the cuvette is placed into a detection unit in one pesticide residue detector; and after the solution to be detected of the experimental sample is extracted, pouring the solution to be detected of the experimental sample into another empty cuvette, and then putting the cuvette into the detection units in the rest pesticide residue detectors. After the detection is started, light emitted by the light emitting diode (9) penetrates through the detection solution to irradiate the photoelectric sensing module (3), the photoelectric sensing module (3) converts received optical signals into electric signals, and the control processing module (4) processes the electric signals to obtain a detection result.

Further, the light source module opening (7) and the photoelectric sensing module opening (6) are respectively arranged on two opposite sides of the cuvette seat (1), and the light source module opening (7) is connected with the photoelectric sensing module opening (6) through an unshielded light path; the clamping groove (8) is a groove with a rectangular cross section.

Further, the light source module (2) is embedded into the opening (7) of the light source module, the light source on the light source module (2) is a light emitting diode (9), the wavelength range is 390-430 nm, and the light emitting surface is rectangular; photoelectric sensing module (3) are embedded into photoelectric sensing module trompil (6), and photoelectric sensor (11) are chooseed for use to the sensor on photoelectric sensing module (3), and the photosurface is the rectangle.

Furthermore, the chip capacitor (13) and the chip resistor (15) are packaged by 0805.

Furthermore, the light source module (2), the photoelectric sensing module (3) and the control processing module (4) are electrically connected.

Furthermore, a lithium battery charging and discharging booster circuit and a light source driving circuit are integrated on the control processing module (4).

Furthermore, a 3.7V lithium battery is selected as the power supply, and a stable 5V voltage can be output through a lithium battery charging and discharging booster circuit in the control processing module (4).

Furthermore, the light emitting diode (9) selects a constant current driving mode, and can be controlled to be on or off by controlling a light source driving circuit in the processing module (4).

Furthermore, the control processing module (4) is reserved with pin arranging holes for external keys and a display, and the external keys can control the detection process and display results of the external display.

The above examples are only illustrations of the present invention, and do not constitute a limitation to the protection scope of the present invention, and all designs the same as or similar to the present invention belong to the protection scope of the present invention.

Claims

1. The internal detection system of the pesticide residue detector is characterized by comprising a control processing module (4) and at least two independent internal detection units of the pesticide residue detector, wherein the internal detection units of the pesticide residue detector are completely identical in composition and structure, and each detection unit comprises a cuvette seat (1), a light source module (2) and a photoelectric sensing module (3); a cuvette groove (5) is arranged in the cuvette seat (1); a light source module opening (7) and a photoelectric sensing module opening (6) are respectively arranged on two sides of the cuvette seat (1); the bottom of the cuvette seat (1) is provided with a clamping groove (8) for fixing.

2. The internal detection system of the pesticide residue detector as claimed in claim 1, wherein the overall appearance structure of the cell holder (1) is a cuboid, the cell slot (5) is arranged in the middle for placing the cell, and the housing of the cell holder (1) is made of a light-tight material.

3. The internal detection system of the pesticide residue detector as claimed in claim 1, wherein the light source module (2) is embedded into the opening (7) of the light source module, the light source on the light source module (2) is a light emitting diode (9), the wavelength range is 390-430 nm, and the light emitting surface is rectangular; the photoelectric sensing module (3) is embedded into the opening (6) of the photoelectric sensing module, a sensor on the photoelectric sensing module (3) adopts a photoelectric sensor (11), and the light sensing surface is rectangular; the light source module opening (7) and the photoelectric sensing module opening (6) are respectively arranged on two opposite sides of the cuvette seat (1), and the light source module opening (7) is connected with the photoelectric sensing module opening (6) through an unshielded light path; the clamping groove (8) is a groove with a rectangular cross section.

4. The internal detection system of the pesticide residue detector as claimed in claim 1, wherein the light emitted by the light source module (2) is transmitted through the detection solution in the cuvette and irradiates the photoelectric sensing module (3), and the photoelectric sensing module (3) converts the received light signal into an electrical signal.

5. The system according to claim 1, wherein one of the detection units is used to collect optical information of a control sample and the other detection units are used to collect optical information of a test sample.