A device for detecting heavy metal content of chili

Abstract

The utility model provides a kind of pepper heavy metal content detection device, it is related to agricultural product detection device field, including handle, press bar, extrusion kit, detection test paper, test paper groove, darkroom, optical detection module and display screen, the press bar is movably installed on handle upper part, handle lower part is provided darkroom, optical detection module is installed in darkroom, and the top of darkroom is provided with test paper groove installation detection test paper, and detection hole that passes through test paper groove is opened in the top wall of darkroom, the detection hole and press bar are located on same axis, the upper portion of extrusion kit and the lower end of press bar are detachably installed, and extrusion kit lower part is placed on detection hole and is provided with liquid outlet hole that falls into the range of detection hole, the display screen is arranged on handle, and optical detection module is connected with display screen by microcontroller being arranged in darkroom, the utility model provides portable, for the device of heavy metal content in on-site rapid screening pepper and other agricultural products.

Description

Technical Field

[0001] This utility model relates to the field of agricultural product testing devices, specifically to a device for detecting heavy metal content in chili peppers. Background Technology

[0002] Chili peppers exhibit a strong ability to accumulate cadmium in the soil, meaning that even if the cadmium content in the soil is not high, chili pepper plants may absorb and accumulate a considerable amount of cadmium from the environment, which will eventually migrate to the fruit (chili peppers). Different varieties of chili peppers have different abilities to accumulate cadmium, but in general, solanaceous vegetables (chili peppers, eggplants, etc.) are more likely to accumulate cadmium than other types of vegetables.

[0003] Given the aforementioned risks, chili farmers need to conduct self-inspections to avoid economic losses due to products exceeding standards. Agricultural product purchasing stations, when making large-scale purchases, need to rapidly screen different batches of chilies to control raw material quality. However, existing testing methods rely on laboratories or laboratory equipment, and the complex procedures require specialized laboratory personnel, which cannot meet the rapid screening needs of on-site environments such as production areas, markets, and purchasing stations. Utility Model Content

[0004] To overcome the problems in the prior art, this utility model provides a portable device for rapid on-site screening of heavy metal content in agricultural products such as chili peppers.

[0005] A device for detecting heavy metal content in chili peppers includes a handle, a pressure rod, a squeezing kit, test strips, a test strip slot, a dark chamber, an optical detection module, and a display screen. The pressure rod is movably mounted on the upper part of the handle, and the dark chamber is located at the lower part of the handle. The optical detection module is installed inside the dark chamber, and the test strip slot is located at the top of the dark chamber to hold the test strips. A detection hole penetrating the test strip slot is opened on the top wall of the dark chamber. The detection hole and the pressure rod are located on the same axis. The upper part of the squeezing kit is detachably mounted to the lower end of the pressure rod. The lower part of the squeezing kit is placed on the detection hole and has an outlet hole that allows liquid to fall into the detection hole. The display screen is mounted on the handle, and the optical detection module is connected to the display screen through a microcontroller located in the dark chamber.

[0006] Furthermore, the optical detection module includes a light source and an optical sensor. The light source is arranged symmetrically in the dark chamber with at least one set emitting light towards the test strip slot. The optical sensor is located at the bottom of the dark chamber and on the same axis as the detection hole. The detection path of the optical sensor passes through the gap between the light sources to reach the test strip. The optical sensor is connected to a microcontroller.

[0007] Furthermore, the light source is selected from LED beads or light-emitting diodes, and the optical sensor is selected from RGB color sensors or photodiodes.

[0008] Furthermore, the extrusion kit is a disposable extrusion kit, which includes a top cover connected to the lower end of the pressure rod and an extrusion groove placed on the detection hole. The liquid outlet is opened at the bottom of the extrusion groove. The top cover and the extrusion groove are connected by a flexible component, and the outer diameter of the top cover matches the inner diameter of the extrusion groove.

[0009] Furthermore, the test strip has a reaction area, on which a chemical reagent that has a specific colorimetric or fluorescent response to cadmium ions is immobilized.

[0010] Furthermore, the chemical reagent immobilized on the reaction zone is a cadmium reagent or a dithizone.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The process of pressing and extracting juice from the sample, reacting with the test strip, and automatically reading the instrument are all integrated into one unit. Users can complete the test simply by pressing the button. The operation is simple and convenient for farmers or purchasing stations. 2. The sample is completely contained in the disposable squeezing kit and does not come into contact with the main body of the device. The test strip is also a disposable consumable, which fundamentally avoids cross-contamination and ensures the accuracy of continuous testing. 3. The design of the detection hole cleverly enables precise dripping of sample juice while ensuring the airtightness of the optical detection environment below. In the closed dark room, the color change is automatically read by the optical module, eliminating ambient light interference and subjective errors of human interpretation, making the detection results stable and reliable. Attached Figure Description

[0012] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the extrusion kit structure of this utility model; Figure 3 This is a schematic diagram of the optical detection module structure of this utility model; Figure 4 This is a schematic diagram of the optical detection hole structure of this utility model.

[0014] 1-Handle, 2-Pressure bar, 3-Squeeze kit, 31-Liquid outlet, 32-Top cover, 33-Squeeze groove, 4-Test strip, 5-Test strip slot, 6-Dark chamber, 61-Detection hole, 7-Optical detection module, 71-Light source, 72-Optical sensor, 8-Display screen. Detailed Implementation

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0016] See Figure 1 This utility model proposes a device for detecting heavy metal content in chili peppers, which consists of a handheld main body and replaceable disposable consumables; The handle 1 has an ergonomic overall structure, making it convenient for users to hold and operate with one hand. The upper part of the handle 1 is provided with a pressure bar 2 that can slide vertically. Users can apply squeezing force by pressing down on the pressure bar 2. The handle 1 is provided with a display screen 8 for displaying the test results. See Figure 1 and Figure 4 The lower part of the handle 1 is a base, and the base is equipped with a dark chamber 6 to provide a stable environment for optical detection that is not affected by external light. At the top of the dark chamber 6, there is a test strip slot 5, which allows the user to easily insert the test strip 4 from the side. The test strip 4 is a consumable, and its reaction area is immobilized with a chemical reagent that is sensitive to specific heavy metals (such as cadmium), such as cadmium reagent test strip or dithizone test strip. In order to allow the sample juice to drip onto the test strip, there is a detection hole 61 on the top wall of the dark chamber 6. This hole penetrates the test strip slot 5, so that the reaction area of ​​the inserted test strip 4 is exposed directly below the hole.

[0017] See Figure 2 The extrusion kit 3 consists of a top cover 32 and an extrusion groove 33, which are connected by a flexible component (such as an integrally molded plastic sheet) for easy opening and closing. In use, the user puts the chili sample into the extrusion groove 33 and then puts the top cover 32 on. Its outer diameter fits tightly with the inner diameter of the extrusion groove 33. The upper part of the extrusion kit 3, that is, the outer side of the top cover 32, is detachably installed with the lower end of the pressure rod 2 through a buckle or other means. The lower part of the extrusion kit 3, that is, the bottom of the extrusion groove 33, is stably placed on the detection hole 61 at the top of the darkroom 6. The bottom center of the extrusion groove 33 has a liquid outlet hole 31. See Figure 3 Inside the dark chamber 6, an optical detection module 7 is installed, including a light source 71 and an optical sensor 72. The light source 71 is preferably an LED or a light-emitting diode, and at least one set is symmetrically arranged on the inner wall of the dark chamber 6, emitting light towards the test paper 4 to provide uniform illumination. The optical sensor 72 is preferably an RGB color sensor or a photodiode, installed at the bottom of the dark chamber 6 with its photosensitive surface facing upwards and located on the same axis as the detection hole 61. Its detection path can pass through the gap between the symmetrically arranged light sources 71, allowing for unobstructed "observation" of the color change of the test paper 4.

[0018] The control core of the device is a microcontroller or a similar single-chip microcomputer (MCU), mounted on the internal circuit board of the dark chamber 6 or the handle 1. This controller connects to and controls the operation of the optical detection module 7 and the display content of the display screen 8. Operating process: The user takes a new test strip 4 and inserts it into the test strip slot 5. The user takes a new disposable squeezing kit 3, puts the chili sample into it, closes the top cover 32, and installs it onto the lower end of the pressure rod 2. The user moves the pressure rod 2 and the squeezing kit 3 downward together. The bottom of the squeezing kit 3 sits on the detection hole 61. The user presses down on the pressure rod 2. The pressure is transmitted through the top cover 32 to the sample in the squeezing slot 33, squeezing out the juice. The sample juice is precisely dripped from the outlet hole 31 at the bottom of the squeezing groove 33 onto the reaction area of ​​the test paper 4 below, and a color reaction occurs; then the detection is started. After the preset reaction time (60 seconds), the microcontroller starts the optical detection module 7, the light source 71 illuminates the test paper, and the optical sensor 72 captures the color information of the reaction area and converts it into an electrical signal. The microcontroller calculates the heavy metal content based on the built-in algorithm and calibration data, and finally sends the results such as "qualified", "exceeding the standard" or specific concentration value to the display screen 8. After the test is completed, the user lifts the pressure bar 2 upwards, removes and discards the used disposable squeezing kit 3, and at the same time pulls the used test strip 4 out of the test strip tank 5 and discards it. The main body of the device does not require any cleaning and can be used for the next test immediately.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for detecting heavy metal content in chili peppers, characterized in that, The device includes a handle (1), a pressure rod (2), a squeezing kit (3), a test strip (4), a test strip slot (5), a dark chamber (6), an optical detection module (7), and a display screen (8). The pressure rod (2) is movably mounted on the upper part of the handle (1), and the dark chamber (6) is set at the lower part of the handle (1). The optical detection module (7) is installed in the dark chamber (6). The test strip slot (5) is set at the top of the dark chamber (6) to install the test strip (4). A detection hole (61) penetrating the test strip slot (5) is opened on the top wall of the dark chamber (6). The detection hole (61) and the pressure rod (2) are located on the same axis. The upper part of the squeezing kit (3) is detachably mounted to the lower end of the pressure rod (2). The lower part of the squeezing kit (3) is placed on the detection hole (61) and has an outlet hole (31) that falls into the range of the detection hole (61). The display screen (8) is set on the handle (1). The optical detection module (7) is connected to the display screen (8) through a microcontroller set in the dark chamber (6).

2. The chili pepper heavy metal content detection device according to claim 1, characterized in that, The optical detection module (7) includes a light source (71) and an optical sensor (72). The light source (71) is symmetrically arranged in the dark chamber (6) and emits light towards the test strip slot (5). The optical sensor (72) is located at the bottom of the dark chamber (6) and is on the same axis as the detection hole (61). The detection path of the optical sensor (72) passes through the gap between the light sources (71) to reach the test strip (4). The optical sensor (72) is connected to the microcontroller.

3. The chili pepper heavy metal content detection device according to claim 2, characterized in that, The light source (71) is selected from LED beads or light-emitting diodes, and the optical sensor (72) is selected from RGB color sensors or photodiodes.

4. The chili pepper heavy metal content detection device according to claim 1, characterized in that, The extrusion kit (3) is a disposable extrusion kit (3). The extrusion kit (3) includes a top cover (32) connected to the lower end of the pressure rod (2) and an extrusion groove (33) placed on the detection hole (61). The liquid outlet (31) is opened at the bottom of the extrusion groove (33). The top cover (32) and the extrusion groove (33) are connected by a flexible component. The outer diameter of the top cover (32) matches the inner diameter of the extrusion groove (33).

5. The chili pepper heavy metal content detection device according to claim 1, characterized in that, The test strip (4) has a reaction area, on which a chemical reagent that has a specific colorimetric or fluorescent response to cadmium ions is immobilized.

6. The chili pepper heavy metal content detection device according to claim 5, characterized in that, The chemical reagent immobilized on the reaction zone is either cadmium reagent or dithizone.

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