Soil heavy metal pollution field automatic detection device and method

Abstract

The invention discloses a soil heavy metal pollution site automatic detection device and method, and relates to the field of soil detection. The control device generates a moving instruction according to the positioning coordinates of the target sampling point and controls the moving platform to move to the target sampling point; the soil sampling device performs soil sampling according to the sampling instruction to obtain a soil sample; the soil pretreatment device is used for pretreating a soil sample under the control of the control device to obtain a treated soil sample; the soil detection device is used for detecting the treated soil sample according to the soil detection instruction so as to carry out qualitative and quantitative analysis measurement on heavy metal pollutants, and a detection result is obtained. The invention aims to realize on-site automatic monitoring of soil heavy metal pollution.

Description

Technical Field

[0001] The present application relates to the field of soil detection, and in particular to an on-site automatic detection device and method for soil heavy metal pollution. Background Art

[0002] Soil health is not only directly related to crop yield and quality, but also determines the balance and sustainable development of the ecosystem. The problem of soil heavy metal pollution is becoming increasingly serious, which not only affects the quality of cultivated land and causes food production reduction, but also threatens human health through the food chain. Monitoring of soil heavy metal pollution is of great significance for improving farmland quality, protecting the ecological environment and human health.

[0003] At present, the soil sample collection method for soil heavy metal pollution monitoring is usually carried out in accordance with the industry standard "Technical Specifications for Soil Environmental Monitoring" (HJ / T166-2004), which specifically includes the site distribution method (random, equal amount, quantity), sample collection (preliminary / formal / supplementary sampling, monitoring, site distribution, profile sample / mixed sample collection), sample preparation (air drying, coarse grinding, fine grinding, packaging) and preservation process. The process is cumbersome and relies entirely on manual operations, including field sampling and laboratory pretreatment.

[0004] Existing soil monitoring technology requires that the collected soil samples be transported back after they are collected, and that the soil be pre-processed manually before testing. This technology still cannot solve the problem of rapid on-site detection of heavy metal pollution in soil.

[0005] Therefore, it is necessary to develop an integrated intelligent device that can automatically complete soil collection, pretreatment and automated detection to realize on-site automatic monitoring of soil heavy metal pollution. Summary of the invention

[0006] The purpose of this application is to provide an automatic detection device and method for on-site heavy metal pollution in soil, which can realize automatic on-site monitoring of heavy metal pollution in soil.

[0007] To achieve the above objectives, this application provides the following solutions:

[0008] In a first aspect, the present application provides an on-site automatic detection device for heavy metal pollution in soil, comprising: a mobile platform, a soil sampling device, a soil pretreatment device, a soil detection device, and a control device;

[0009] The soil sampling device, the soil pretreatment device, the soil detection device and the control device are all arranged on the mobile platform; the soil sampling device, the soil pretreatment device, the soil detection device and the mobile platform are all connected to the control device;

[0010] The control device is used to generate a movement instruction according to the positioning coordinates of the target sampling point;

[0011] The mobile platform is used to move to the target sampling point according to the movement instruction;

[0012] The soil sampling device is used for:

[0013] Perform soil sampling according to the sampling instruction to obtain a soil sample; the sampling instruction is a control instruction issued by the control device after the mobile platform moves to the target sampling point;

[0014] The soil sample is moved to the soil pretreatment device, and a feedback signal is sent to the control device; the feedback signal is used to indicate that the soil sampling device has completed sampling;

[0015] The soil pretreatment device is used to pretreat the soil sample under the control of the control device to obtain a treated soil sample;

[0016] The control device is also used to issue soil detection instructions;

[0017] The soil detection device is used to detect the processed soil sample according to the soil detection instruction to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain detection results.

[0018] Optionally, the soil sampling device comprises: a first control module, a mechanical arm, a power module and a soil sampling module;

[0019] The first control module is connected to the mechanical arm, the power module and the soil taking module respectively; the power module is also connected to the mechanical arm and the soil taking module respectively; the first control module is also connected to the control device;

[0020] The first control module is used to control the mechanical arm to drive the power module and the soil sampling module to move to the target sampling point according to the movement instruction;

[0021] The power module is used to drive the soil sampling module to perform soil sampling and obtain soil samples under the control of the first control module.

[0022] Optionally, the soil pretreatment device comprises: a second control module, a drying module and a screening module;

[0023] The second control module is connected to the control device; the second control module is also connected to the drying module and the screening module respectively;

[0024] The second control module is used to control the drying module to dry the soil sample under the control of the control device to obtain a dried soil sample;

[0025] The screening module is used to screen the dried soil sample to obtain a processed soil sample.

[0026] Optionally, the drying module includes: a first soil container, a heating module and a conveying module;

[0027] The heating module and the transmission module are both connected to the second control module; the heating module and the transmission module are also both connected to the first soil container;

[0028] The first soil container is used to collect the soil sample;

[0029] The heating module is used to heat the soil sample and evaporate water to obtain a dried soil sample;

[0030] The conveying module is used to convey the dried soil sample to the screening module.

[0031] Optionally, the screening module comprises: a second soil container, a vibrating screen and a grinding module;

[0032] The second soil container is connected to the transmission module; the vibrating screen and the grinding module are both connected to the second control module; the vibrating screen and the grinding module are also both connected to the second soil container; the second soil container is connected to the transmission module;

[0033] The second soil container is used to collect the dried soil sample;

[0034] The vibrating screen is used to filter the dried soil sample, and the grinding module is used to grind the dried soil sample to obtain a processed soil sample.

[0035] Optionally, the on-site automatic detection device for heavy metal pollution in soil further comprises: a cloud platform;

[0036] The cloud platform is connected to the control device;

[0037] The cloud platform is used to send the positioning coordinates of the target sampling point to the control device;

[0038] The cloud platform is also used to receive the detection results and display them.

[0039] Optionally, the control device includes: a wireless communication module, a positioning module and a controller;

[0040] The controller is connected to the cloud platform via the wireless communication module; the positioning module is arranged on the mobile platform and connected to the controller.

[0041] Optionally, the automatic on-site detection device for heavy metal pollution in soil further comprises: a power supply device;

[0042] The power supply device is arranged on the mobile platform;

[0043] The power supply device is used to provide electric energy; the power supply device comprises: a lithium battery and a voltage conversion module.

[0044] Optionally, the soil detection device comprises: an extract generation module, a deionized water tank, an electrochemical sensor module and a third control module;

[0045] The leachate generation module, the deionized water tank and the electrochemical sensor module are all connected to the third control module; the leachate generation module is connected to the deionized water tank and the electrochemical sensor module respectively;

[0046] The deionized water tank is used to store deionized water;

[0047] The third control module is used to control the deionized water tank to flow the deionized water into the leachate generating module;

[0048] The extract generating module is used for performing ultrasonic vibration treatment on the deionized water and the treated soil sample according to the control instruction of the third control module to obtain soil extract, and transmitting the soil extract to the electrochemical sensor module;

[0049] The electrochemical sensor module is used to perform output analysis processing on the stripping voltammetric signal of the soil extract to obtain the detection result.

[0050] In a second aspect, the present application provides a method for automatic detection of soil heavy metal pollution on site, which is implemented by the automatic detection device for soil heavy metal pollution on site described above; the method comprises:

[0051] Get the positioning coordinates of the target sampling point;

[0052] Generate movement instructions according to the positioning coordinates of the target sampling point;

[0053] Control the mobile platform to move to the target sampling point according to the movement instruction;

[0054] Controlling the soil sampling device to perform soil sampling to obtain soil samples;

[0055] controlling a soil pretreatment device to pretreat the soil sample to obtain a treated soil sample;

[0056] The soil detection device is controlled to detect the treated soil sample to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain detection results.

[0057] According to the specific embodiments provided in this application, this application has the following technical effects:

[0058] The present application provides an automatic detection device and method for on-site heavy metal pollution in soil. The control device generates a moving instruction according to the positioning coordinates of the target sampling point, and controls the mobile platform to move to the target sampling point; the soil sampling device performs soil sampling according to the sampling instruction to obtain a soil sample; the soil pretreatment device pretreats the soil sample under the control of the control device to obtain a treated soil sample; the soil detection device detects the treated soil sample according to the soil detection instruction to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain the detection result. Since the present application performs detection and control through the control device, the degree of automation is high, and the soil sample collection, pretreatment and detection are completed automatically throughout the process, which reduces the labor cost and does not require manual collection of soil samples for processing and detection. Therefore, the present application can realize automatic monitoring of on-site heavy metal pollution in soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0060] Figure 1 This is a working diagram of the automatic on-site detection device for heavy metal pollution in soil;

[0061] Figure 2 This is a structural diagram of the composition of the on-site automatic detection device for heavy metal pollution in soil;

[0062] Figure 3 It is a block diagram of the composition of the soil sampling device;

[0063] Figure 4 It is a block diagram of the composition of the soil pretreatment device;

[0064] Figure 5 It is a block diagram of the components of the control device;

[0065] Figure 6 This is a block diagram of some components of the soil detection device. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0068] Soil monitoring technology realizes the automated design of soil sampling devices, such as placing sampling components and storage components on a mobile platform with GPS positioning function, remotely controlling the mobile platform to reach the designated collection location, accurately collecting soil at a designated depth, and testing after sampling. The present invention aims to provide an automatic on-site detection device for soil heavy metal pollution, such as a robot, which is controlled by remote control to reach the target collection location, and then the robot automatically collects and monitors contaminated soil samples.

[0069] The embodiment of the present application provides an on-site automatic detection device for heavy metal pollution in soil, including: a mobile platform, a soil sampling device, a soil pretreatment device, a soil detection device and a control device.

[0070] The soil sampling device, the soil pretreatment device, the soil detection device and the control device are all arranged on the mobile platform; the soil sampling device, the soil pretreatment device, the soil detection device and the mobile platform are all connected with the control device.

[0071] The control device is used to generate a movement instruction according to the positioning coordinates of the target sampling point; and the mobile platform is used to move to the target sampling point according to the movement instruction.

[0072] The soil sampling device is used to perform soil sampling according to the sampling instruction to obtain soil samples; the sampling instruction is a control instruction issued by the control device after the mobile platform moves to the target sampling point.

[0073] The soil sampling device moves the soil sample to the soil pretreatment device and sends a feedback signal to the control device; the feedback signal is used to indicate that the sampling of the soil sampling device is completed.

[0074] The soil pretreatment device is used to pretreat the soil sample under the control of the control device to obtain a treated soil sample.

[0075] The control device is also used to issue soil detection instructions; the soil detection device is used to detect the processed soil samples according to the soil detection instructions to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain detection results.

[0076] The soil sampling device includes: a first control module, a mechanical arm, a power module and a soil sampling module.

[0077] The first control module is connected to the mechanical arm, the power module and the soil taking module respectively; the power module is also connected to the mechanical arm and the soil taking module respectively; the first control module is also connected to the control device.

[0078] The first control module is used to control the mechanical arm to drive the power module and the soil sampling module to move to the target sampling point according to the movement instruction.

[0079] The power module is used to drive the soil sampling module to perform soil sampling and obtain soil samples under the control of the first control module.

[0080] The soil pretreatment device comprises: a second control module, a drying module and a screening module.

[0081] The second control module is connected to the control device; the second control module is also connected to the drying module and the screening module respectively; the second control module is used to control the drying module to dry the soil sample under the control of the control device to obtain a dried soil sample.

[0082] The sieving module is used to sieving the dried soil sample to obtain a processed soil sample.

[0083] The drying module includes: a first soil container, a heating module and a conveying module.

[0084] The heating module and the transmission module are both connected to the second control module; the heating module and the transmission module are also both connected to the first soil container.

[0085] The first soil container is used to collect soil samples; the heating module is used to heat the soil samples and evaporate water to obtain dried soil samples.

[0086] The conveying module is used to convey the dried soil sample to the screening module.

[0087] The screening module comprises: a second soil container, a vibrating screen and a grinding module.

[0088] The second soil container is connected to the transmission module; the vibration screen and the grinding module are both connected to the second control module; the vibration screen and the grinding module are also connected to the second soil container; the second soil container is connected to the transmission module.

[0089] The second soil container is used to collect the dried soil sample; the vibrating screen is used to filter the dried soil sample; the grinding module is used to grind the dried soil sample to obtain a processed soil sample. The grinding and sieving work synchronously, that is, grinding and sieving at the same time; in other words, the vibrating screen works synchronously with the grinding module.

[0090] The on-site automatic detection device for soil heavy metal pollution also includes: a cloud platform; the cloud platform is connected to the control device; the cloud platform is used to send the positioning coordinates of the target sampling point to the control device; the cloud platform is also used to receive the detection results and display them.

[0091] The control device includes: a wireless communication module, a positioning module and a controller; the controller is connected to the cloud platform via the wireless communication module; the positioning module is arranged on the mobile platform and connected to the controller.

[0092] The automatic detection device for heavy metal pollution on site in soil also includes: a power supply device; the power supply device is arranged on a mobile platform. The power supply device is used to provide electric energy. The power supply device includes: a lithium battery and a voltage conversion module.

[0093] In practical applications, the devices mentioned in this application, such as Figure 2 As shown, it includes a mobile platform, a soil sampling device, a soil pretreatment device, a soil detection device, a power supply device, and a control device. The soil sampling device, the soil pretreatment device, the soil detection device, the power supply device, and the control device are placed on the mobile platform. The mobile platform moves to the target location to complete the on-site automatic monitoring of soil heavy metal pollution.

[0094] Soil sampling devices, such as Figure 3 As shown, it includes a control module 1 (first control module), a mechanical arm, a power module and a soil taking module. The mechanical arm is connected to the power module, and the power module is connected to the soil taking module. The mechanical arm is responsible for driving the power module and the soil taking module to the designated sampling location, and then the power module drives the soil taking module to descend to obtain soil samples, and then the mechanical arm drives the power module and the soil taking module to the pretreatment device, and the power module drives the soil taking module to send the soil sample into the pretreatment device. The control module 1 (first control module) is responsible for receiving the control instructions of the control device, and then controlling the mechanical arm, the power module and the soil taking module to complete various actions of collecting soil samples and sending soil into the pretreatment device.

[0095] Soil pretreatment devices, such as Figure 4As shown, it includes: a control module 2 (second control module), a drying module and a screening module, wherein the drying module includes a soil container 1 (first soil container), a heating module and a transmission module, the soil container 1 (first soil container) is used to collect soil samples transmitted by the soil sampling device, the heating module is responsible for heating the soil sample and evaporating the water in the soil sample, and the transmission module sends the soil sample to the screening module after heating, and the screening module includes a soil container 2 (second soil container), a vibrating screen and a grinding module, the soil container 2 (second soil container) is responsible for collecting the dried soil sample transmitted by the drying module, the vibrating screen is used to filter the soil sample, and the grinding module grinds the soil sample for easy screening, and the control module 2 (second control module) is used to receive the control instruction of the control device, and then control the drying module and the screening module to complete the drying and screening of the soil. The soil pretreatment device is connected to the soil detection device, wherein the filtering module in the soil pretreatment device is directly opposite to the entrance of the soil detection device, and the soil sample is automatically sent to the soil detection device after screening.

[0096] The soil testing device is responsible for testing the pre-treated soil samples transmitted from the soil pre-treatment device and completing the qualitative and quantitative analysis and measurement of heavy metal pollutants.

[0097] Specifically, the soil detection device includes: an extract generation module, a deionized water tank, an electrochemical sensor module and a third control module.

[0098] The leachate generation module, the deionized water tank and the electrochemical sensor module are all connected to the third control module; the leachate generation module is connected to the deionized water tank and the electrochemical sensor module respectively.

[0099] The deionized water tank is used to store deionized water; the third control module is used to control the deionized water tank to flow the deionized water into the leaching solution generating module.

[0100] The extract generating module is used for performing ultrasonic vibration treatment on the deionized water and the processed soil sample according to the control instruction of the third control module to obtain the soil extract, and transmit the soil extract to the electrochemical sensor module.

[0101] The electrochemical sensor module is used to perform output analysis and processing of the stripping voltammetric signal of the soil extract to obtain the detection result.

[0102] In practical applications, the composition structure of the soil detection device is as follows Figure 6As shown. Among them, the extract generation module consists of a 50ml stainless steel container, an ultrasonic vibration sensor and an inlet and outlet pipe. When the soil pretreatment device completes the standard soil collection, that is, after the soil sample is pretreated, the treated soil sample is sent to the stainless steel container, the water inlet pipe is connected to the deionized water tank through a micro flow meter 1 and obtains 10ml-20ml deionized water into the stainless steel container, the ultrasonic vibration sensor works, and the soil extract is obtained after 3 minutes to 5 minutes of ultrasound. The outlet pipe sends 1ml-2ml soil extract into the electrochemical sensor module through the micro flow meter 3, and the remaining soil extract is discharged through the outlet pipe. Then the water inlet pipe obtains 20ml of deionized water to rinse the stainless steel container.

[0103] Among them, the deionized water tank stores deionized water, which is connected to the water inlet pipe in the leaching solution generating module through the micro flow meter 1, to provide deionized water for the leaching solution generating module, and at the same time completes the cleaning function of the stainless steel utensils and the inlet and outlet pipes in the leaching solution generating module, and the cleaning function of the electrochemical sensor module.

[0104] Among them, the electrochemical sensor module is composed of 3-5 electrochemical sensors, stripping voltammetric signal triggering acquisition circuit and display screen. Different electrochemical sensor combinations (copper ion electrochemical sensor, mercury ion electrochemical sensor, arsenic ion electrochemical sensor, chromium ion electrochemical sensor, etc.) can be configured according to the needs of the detection object. The stripping voltammetric signal triggering acquisition circuit provides the electrochemical sensor with working voltage and electrochemical signal output analysis. After the electrochemical sensor module senses the output, the display screen displays the type and concentration information of heavy metal ions in the soil. At the same time, the deionized water tank delivers 2ml-3ml of deionized water to the electrochemical sensor module through the micro flowmeter 2 to complete the cleaning of the electrochemical sensor module.

[0105] The third control module is connected to the leaching solution generating module, the deionized water tank and the electrochemical sensor module in the soil detection device to complete the control of the micro flow meter of the entire device and the ultrasonic vibration function of the leaching solution generating module.

[0106] The power supply device includes a lithium battery and a voltage conversion module, which is used to provide power to the mobile platform, soil sampling device, soil pretreatment device, soil detection device, and control device and meet the requirements of different interface voltages.

[0107] Control devices, such as Figure 5 As shown, it includes a wireless communication module, a positioning module and a controller. The controller obtains instructions from the operator of the Internet of Things cloud platform through the wireless communication module, and controls the mobile platform to move to the specified position with the support of the positioning data of the positioning module, and then controls the soil sampling device, the soil pretreatment device, and the soil detection device to complete the soil detection, and then uploads the monitoring results to the Internet of Things cloud platform through the wireless communication module.

[0108] Regarding the execution process Figure 1 First, the operator sends the positioning coordinates of the target monitoring site sampling point to the automatic soil heavy metal pollution site monitoring device, such as a robot, through the Internet of Things cloud platform, and then the controller in the control device receives the coordinate information through the wireless communication module, and controls the mobile platform to reach the target position with the support of the positioning data of the positioning module.

[0109] After reaching the target position, the control device sends an automatic sampling command to the soil sampling device, and then the control module 1 (the first control module) starts to control the mechanical arm to drive the power module and the soil taking module to move above the soil at the target sampling point. The power module drives the soil taking module to descend and collect soil samples, and then rises. The control module 1 (the first control module) controls the mechanical arm to drive the power module and the soil taking module to move above the soil pretreatment device. The power module drives the soil taking module to send the soil sample into the soil container 1 (the first soil container) in the soil pretreatment device, and then feeds back to the control device that the soil sampling is completed.

[0110] After receiving the soil sampling completion information, the control device immediately sends a soil sample pretreatment instruction to the soil pretreatment device. The control module 2 (the second control module) immediately controls the heating module in the drying module to heat the soil sample in the soil container 1 (the first soil container). After heating, the transmission module is controlled to transmit the soil sample to the soil container 2 (the second soil container) in the screening module, and then the vibration screen and the grinding module are controlled to complete the grinding and screening. The sieved soil sample automatically enters the entrance of the soil detection device. After the soil is ground and screened, the control module 2 (the second control module) feeds back to the control device that the soil pretreatment is completed.

[0111] After receiving the information that the soil pretreatment is completed, the control device immediately sends a soil detection start instruction to the soil detection device. The soil detection device begins to detect the pretreated soil samples transmitted by the soil pretreatment device, completes the qualitative and quantitative analysis and measurement of heavy metal pollutants, and feeds back the detection results to the control device.

[0112] After the control device receives the soil heavy metal pollutant information fed back by the soil detection device, it controls the wireless communication module through the controller to upload it to the Internet of Things cloud platform.

[0113] Operators can view the heavy metal pollution status of the soil at the target location on the IoT cloud platform.

[0114] In one embodiment, the present application provides a method for automatic detection of soil heavy metal pollution on site, which is implemented by a device for automatic detection of soil heavy metal pollution on site. The method includes:

[0115] Obtain the positioning coordinates of the target sampling point; generate a movement instruction according to the positioning coordinates of the target sampling point; control the mobile platform to move to the target sampling point according to the movement instruction; control the soil sampling device to perform soil sampling to obtain a soil sample; control the soil pretreatment device to perform pretreatment on the soil sample to obtain a treated soil sample; control the soil detection device to detect the treated soil sample to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain a detection result.

[0116] Benefits of this application:

[0117] 1. High degree of automation, soil sample collection, pretreatment and testing are all completed automatically.

[0118] 2. Labor costs are reduced. Operators can remotely control the robot to complete soil heavy metal pollutant detection, without the need for manual soil sample collection, processing and testing.

[0119] 3. The detection speed is fast. The soil sample collection, pretreatment and detection devices are integrated into one. Soil samples are collected, processed and tested on-site without entering the laboratory.

[0120] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. An automatic on-site detection device for soil heavy metal pollution, characterized in that: The on-site automatic detection device for heavy metal pollution in soil comprises: a mobile platform, a soil sampling device, a soil pretreatment device, a soil detection device and a control device; The soil sampling device, the soil pretreatment device, the soil detection device and the control device are all arranged on the mobile platform; the soil sampling device, the soil pretreatment device, the soil detection device and the mobile platform are all connected to the control device; The control device is used to generate a movement instruction according to the positioning coordinates of the target sampling point; The mobile platform is used to move to the target sampling point according to the movement instruction; The soil sampling device is used for: Perform soil sampling according to the sampling instruction to obtain a soil sample; the sampling instruction is a control instruction issued by the control device after the mobile platform moves to the target sampling point; The soil sample is moved to the soil pretreatment device, and a feedback signal is sent to the control device; the feedback signal is used to indicate that the soil sampling device has completed sampling; The soil pretreatment device is used to pretreat the soil sample under the control of the control device to obtain a treated soil sample; The control device is also used to issue soil detection instructions; The soil detection device is used to detect the processed soil sample according to the soil detection instruction to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain detection results.

2. The automatic on-site detection device for heavy metal pollution in soil according to claim 1, characterized in that: The soil sampling device comprises: a first control module, a mechanical arm, a power module and a soil sampling module; The first control module is connected to the mechanical arm, the power module and the soil taking module respectively; the power module is also connected to the mechanical arm and the soil taking module respectively; the first control module is also connected to the control device; The first control module is used to control the mechanical arm to drive the power module and the soil sampling module to move to the target sampling point according to the movement instruction; The power module is used to drive the soil sampling module to perform soil sampling and obtain soil samples under the control of the first control module.

3. The automatic on-site detection device for heavy metal pollution in soil according to claim 1, characterized in that: The soil pretreatment device comprises: a second control module, a drying module and a screening module; The second control module is connected to the control device; the second control module is also connected to the drying module and the screening module respectively; The second control module is used to control the drying module to dry the soil sample under the control of the control device to obtain a dried soil sample; The screening module is used to screen the dried soil sample to obtain a processed soil sample.

4. The automatic on-site detection device for soil heavy metal pollution according to claim 3 is characterized in that: The drying module includes: a first soil container, a heating module and a conveying module; The heating module and the transmission module are both connected to the second control module; the heating module and the transmission module are also both connected to the first soil container; The first soil container is used to collect the soil sample; The heating module is used to heat the soil sample and evaporate water to obtain a dried soil sample; The conveying module is used to convey the dried soil sample to the screening module.

5. The automatic on-site detection device for soil heavy metal pollution according to claim 4 is characterized in that: The screening module comprises: a second soil container, a vibrating screen and a grinding module; The second soil container is connected to the transmission module; the vibrating screen and the grinding module are both connected to the second control module; the vibrating screen and the grinding module are also both connected to the second soil container; the second soil container is connected to the transmission module; The second soil container is used to collect the dried soil sample; The vibrating screen is used to filter the dried soil sample, and the grinding module is used to grind the dried soil sample to obtain a processed soil sample.

6. The automatic on-site detection device for heavy metal pollution in soil according to claim 1, characterized in that: The on-site automatic detection device for heavy metal pollution in soil also includes: a cloud platform; The cloud platform is connected to the control device; The cloud platform is used to send the positioning coordinates of the target sampling point to the control device; The cloud platform is also used to receive the detection results and display them.

7. The automatic on-site detection device for soil heavy metal pollution according to claim 6 is characterized in that: The control device comprises: a wireless communication module, a positioning module and a controller; The controller is connected to the cloud platform via the wireless communication module; the positioning module is arranged on the mobile platform and connected to the controller.

8. The automatic on-site detection device for soil heavy metal pollution according to claim 1, characterized in that: The on-site automatic detection device for heavy metal pollution in soil also includes: a power supply device; The power supply device is arranged on the mobile platform; The power supply device is used to provide electrical energy; The power supply device comprises: a lithium battery and a voltage conversion module.

9. The automatic on-site detection device for soil heavy metal pollution according to claim 1, characterized in that: The soil detection device comprises: an extract generation module, a deionized water tank, an electrochemical sensor module and a third control module; The leachate generation module, the deionized water tank and the electrochemical sensor module are all connected to the third control module; the leachate generation module is connected to the deionized water tank and the electrochemical sensor module respectively; The deionized water tank is used to store deionized water; The third control module is used to control the deionized water tank to flow the deionized water into the leachate generating module; The extract generating module is used for performing ultrasonic vibration treatment on the deionized water and the treated soil sample according to the control instruction of the third control module to obtain soil extract, and transmitting the soil extract to the electrochemical sensor module; The electrochemical sensor module is used to perform output analysis processing on the stripping voltammetric signal of the soil extract to obtain the detection result.

10. A method for automatic on-site detection of soil heavy metal pollution, characterized in that: The method for automatic detection of soil heavy metal pollution on site is implemented by the automatic detection device for soil heavy metal pollution on site according to any one of claims 1 to 9; the method comprises: Get the positioning coordinates of the target sampling point; Generate movement instructions according to the positioning coordinates of the target sampling point; Control the mobile platform to move to the target sampling point according to the movement instruction; Controlling the soil sampling device to perform soil sampling to obtain soil samples; controlling a soil pretreatment device to pretreat the soil sample to obtain a treated soil sample; The soil detection device is controlled to detect the treated soil sample to perform qualitative and quantitative analysis and measurement of heavy metal pollutants to obtain detection results.

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