Portable agricultural, livestock and aquatic product multi-parameter detector

Abstract

The invention provides a portable agricultural and livestock aquatic product multi-parameter detector, and relates to the technical field of aquatic product detection. The portable agricultural, livestock and aquatic product multi-parameter detector comprises a main body, a detection structure is arranged at the position, close to the front side edge, of the center of the upper end face of the main body, a display screen is arranged on the upper end face of the main body, a loudspeaker is arranged on the upper end face, close to the rear side of the display screen, of the main body, and a direction button is arranged on the rear side of the loudspeaker. Operation buttons are respectively arranged on the upper end face of the main body around the direction button, an auxiliary structure is arranged at the center of the rear side wall of the main body, and a sensor module, a signal processing module and a data transmission module are arranged in the main body. By arranging the detection structure, the sample bottles are taken out from the interiors of the storage holes, collected samples can be backed up and preserved, and the stability of the sample bottles placed in the storage holes can be guaranteed under the cooperation of threaded connection and a suction cup.

Description

Technical Field

[0001] The present invention relates to the technical field of aquatic product detection, and specifically to a portable multi-parameter detector for agricultural, livestock and aquatic products. Background Art

[0002] With the continuous increase in global attention to food safety and quality, the quality detection of agricultural, livestock and aquatic products has become a key link in ensuring consumer health and enhancing industrial competitiveness. Traditional methods for detecting agricultural, livestock and aquatic products rely on laboratory analysis. Although these methods have high precision, they have problems such as long detection cycles, high costs and complex operations, and are difficult to meet the needs of on-site rapid detection and real-time monitoring. In addition, with the large-scale development of modern agriculture, animal husbandry and aquaculture, higher requirements are put forward for the portability, multi-parameter detection ability and real-time data analysis of detection technologies.

[0003] However, there are still some deficiencies and areas for improvement in existing detectors during actual use. Existing detectors cannot achieve portable operation, resulting in inconvenience during use. At the same time, some portable detectors cannot perform better sampling operations on samples during detection, and existing portable detection devices often have a single function and can only detect a few parameters, making it difficult to comprehensively reflect the quality status of samples. Therefore, technicians in this field have provided a portable multi-parameter detector for agricultural, livestock and aquatic products to solve the problems raised in the above background art. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a portable multi-parameter detector for agricultural, livestock and aquatic products, which solves the problems of inconvenient carrying, inability to perform better sampling and single detection function of existing detection devices.

[0006] (2) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A portable multi-parameter detector for agricultural, livestock and aquatic products, including a main body. A detection structure is provided at the front side edge near the center of the upper end surface of the main body. A display screen is provided on the upper end surface of the main body. A speaker is provided on the upper end surface of the main body near the rear side of the display screen. A direction button is provided at the rear side of the speaker. Operation buttons are respectively provided on the upper end surface of the main body around the direction button. An auxiliary structure is provided at the center of the rear side wall of the main body. A sensor module, a signal processing module and a data transmission module are provided inside the main body;

[0008] The detection structure includes a placement groove, which is arranged at the center of the upper end face of the main body, close to the front side edge. At the center of the lower inner wall of the placement groove, there is a detection port. The lower end of the detection port penetrates the lower inner wall of the placement groove and leads to the inside of the main body. A cover plate is arranged at the upper end of the detection port. A push cover is arranged inside the placement groove. At the center of the upper end edge of the rear side wall of the push cover, there is a connecting buckle fixedly connected. At the center of the upper end of the rear inner side wall of the placement groove, there is a connecting hole, and the connecting hole and the connecting buckle are mutually adapted.

[0009] Preferably, the auxiliary structure includes a card slot. At the center of the rear side wall of the card slot, there is a utility knife arranged inside the card slot. At the center of the front side wall of the utility knife and the center of the rear inner side wall of the card slot, there are respectively fixed magnets. At the center of the rear side edge of the upper and lower inner side walls of the card slot at the upper and lower ends of the utility knife, there are respectively arranged notches.

[0010] Preferably, the detection structure further includes two storage holes, which are respectively arranged at the center of the two side walls of the main body, close to the front side. At the center edge of the inner side wall of the two storage holes, there is internal thread. At the center of the inner side wall of one of the two storage holes, there is a suction cup fixedly connected. Sample bottles are respectively arranged inside the two storage holes.

[0011] Preferably, the sensor module includes a temperature sensor, a humidity sensor, a pH sensor, a conductivity sensor, a heavy metal sensor, a pesticide residue sensor, and a microorganism sensor, and specifically includes the following steps:

[0012] S1. Initialization and self-check. After the host module starts and sends a start instruction to the sensor module, the sensor module first performs power-on self-check, checks the connection status of each sensor, ensures the normal connection between the sensor and the signal processing circuit, verifies whether the power supply voltage of the sensor is within the normal range, avoids measurement errors caused by unstable voltage, checks the standard status of each sensor, and ensures that the sensor has not been recalibrated or interfered with after the last use;

[0013] S2. Sample collection and preparation. The sensor module receives an instruction from the host module and is ready to start sample detection. The user places the agricultural, livestock, and aquatic product samples to be detected in the detection area. The sensor module detects the placement of the samples through a physical interface or an optical sensor. According to different detection parameters, the sensor module may need to preprocess the sample environment;

[0014] S3. Sensor working process. The sensor module activates the corresponding sensor according to the detection mode, and the sensor starts to work and collects various parameter data of the sample. The sensor converts the collected physical or chemical signals into electrical signals. The sensor module performs preliminary processing on the collected analog signals, including amplification, filtering, and analog-to-digital conversion;

[0015] S4. Data transmission and processing. The sensor module transmits the pre - processed digital signals to the host module by wired or wireless means. During the transmission process, the sensor module will perform data verification to ensure the integrity and accuracy of the data. During data transmission, the sensor module will temporarily cache the data in the local memory to prevent data loss. The cached data is cleared after successful transmission to release the storage space. The sensor module receives feedback information from the host module to confirm whether the data is successfully received;

[0016] S5. Sensor calibration and maintenance. The sensor module needs to be calibrated regularly to ensure its measurement accuracy. The calibration process usually involves using standard samples for calibration; the sensor module needs to be cleaned after use to prevent sample residues from affecting the next detection.

[0017] Preferably, the signal processing module includes the following steps:

[0018] S1. Receive sensor signals. The signal processing module receives analog signals from each sensor through a dedicated signal input interface. The interface design needs to consider signal impedance matching and anti - interference ability to ensure that the signal is not lost and interfered during transmission. According to the types and functions of different sensors, the signal processing module classifies and identifies the received signals;

[0019] S2. Signal pre - processing. The analog signals output by the sensor are usually relatively weak. The signal processing module first amplifies the signals, using a low - noise amplifier to amplify the signals to increase the signal amplitude and signal - to - noise ratio. The amplification factor is set according to the output characteristics of the sensor and subsequent processing requirements, usually between 10 and 1000 times. To remove noise and interference in the signals, the signal processing module filters the amplified signals. A low - pass filter is used to filter out high - frequency noise, and a band - pass filter is used to retain useful signals within a specific frequency range. The pre - processed signals are calibrated to eliminate the errors and drifts of the sensor itself, and linearization and compensation processing are performed on the signals using standard parameters pre - stored in the memory;

[0020] S3. Analog - to - digital conversion. According to the dynamic range and resolution requirements of the signals, a high - resolution ADC is selected to ensure the accuracy of the signals. The analog signals are sampled and quantized to convert continuous analog signals into discrete digital signals. The quantization process converts the amplitude values of the analog signals into digital signals, and further digital filtering processing is performed on the converted digital signals to remove residual noise and interference;

[0021] S4. Signal analysis: Extract feature parameters that have an important impact on the detection result from the processed digital signal, and perform preliminary data processing on the extracted feature parameters. Temporarily cache the processed data in the local memory.

[0022] Preferably, the data transmission module includes the following steps:

[0023] S1. Initialization and self-check: When the device is powered on, the data transmission module first performs a power-on self-check to verify the supply voltage of each communication interface and ensure that it is within the normal operating range.

[0024] S2. Data preparation and encapsulation: The data transmission module receives the data to be transmitted from the signal processing module. The data is usually transmitted in the form of digital signals, which can be raw sensor data, processed analysis results, or user-set parameters. According to the requirements of the target terminal, perform format conversion on the data and encapsulate the converted data into a data packet suitable for transmission. The data packet usually includes a data header, data payload, and checksum. The data header contains the source address, target address, and data length.

[0025] S3. Wireless communication: The data transmission module attempts to connect to a pre-configured wireless network. After establishing a connection, the data transmission module sends the data to a preset server or cloud platform through the TCP / IP protocol. During the data transmission process, the module will perform real-time monitoring to ensure the integrity and security of the data.

[0026] S4. Wired communication: The user connects the device to the computer through a USB cable. After the data transmission module detects the USB connection, it initializes the USB interface and prepares for data transmission. The data transmission module sends the data to the connected terminal through the USB protocol. During the data transmission process, the data transmission module will perform data encryption to prevent the data from being stolen or tampered with.

[0027] S5. Data transmission monitoring and feedback: The data transmission module monitors the status of data transmission in real time, including the connection status, transmission rate, and packet loss rate. If a transmission error is detected, the module will retransmit or prompt the user.

[0028] S6. The data transmission module monitors its own power status in real time to ensure that it operates within the normal operating voltage range. In the standby state, the data transmission module will turn off unnecessary communication interfaces and functions to reduce power consumption.

[0029] S7. Fault handling: The data transmission module monitors the status during the data transmission process in real time, detects potential faults and errors. When a fault is detected, the data transmission module will send a fault message to the attention module and attempt to automatically recover from the fault.

[0030] (III) Beneficial effects

[0031] The present invention provides a portable multi-parameter detector for agricultural, livestock and aquatic products, having the following beneficial effects:

[0032] 1. In the present invention, by setting a detection structure, when in use, the push cover is opened, and the collected sample is placed inside the detection port. At the same time, by taking out the sample bottle from the storage hole, the collected sample can be backed up and retained. The cooperation of threaded connection and suction cup can ensure the stability of the sample bottle when placed inside the storage hole.

[0033] 2. In the present invention, by setting an auxiliary structure, when in use, by taking out the utility knife from the card slot, it can be used for slicing and sampling agricultural and livestock products, which is portable and more convenient for overall use.

[0034] 3. In the present invention, the detector can simultaneously detect multiple parameters, including temperature, humidity, pH value, conductivity, heavy metal content, pesticide residue, microbial quantity, etc.; this multi-parameter detection ability enables users to obtain comprehensive sample information in one detection, avoiding the trouble and errors of multiple detections. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Is an axonometric view of the overall structure of the present invention;

[0036] Figure 2 Is an axonometric view of another perspective of the present invention;

[0037] Figure 3 Is a side sectional view of the present invention;

[0038] Figure 4 Is a partial front sectional view of the main body in the present invention;

[0039] Figure 5 Is a schematic flow chart of the operating system in the present invention;

[0040] Wherein, 1. Main body; 2. Detection structure; 201. Push cover; 202. Connection buckle; 203. Cover plate; 204. Detection port; 205. Sample bottle; 206. Connection hole; 207. Placement groove; 208. Storage hole; 209. Internal thread; 210. Suction cup; 3. Speaker; 4. Direction button; 5. Auxiliary structure; 501. Notch; 502. Card slot; 503. Utility knife; 504. Magnet; 6. Operation button; 7. Display screen. DETAILED DESCRIPTION OF THE INVENTION

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment 1:

[0043] As Figures 1-5 shown, the embodiment of the present invention provides a portable multi-parameter detector for agricultural, livestock, and aquatic products, including a main body 1. At the front side edge near the center of the upper end surface of the main body 1, a detection structure 2 is provided. A display screen 7 is provided on the upper end surface of the main body 1. A speaker 3 is provided on the upper end surface of the main body 1 near the rear side of the display screen 7. A direction button 4 is provided at the rear side of the speaker 3. Operation buttons 6 are respectively provided on the upper end surface of the main body 1 around the direction button 4. An auxiliary structure 5 is provided at the center of the rear side wall of the main body 1. A sensor module, a signal processing module, and a data transmission module are provided inside the main body 1;

[0044] The detection structure 2 includes a placement groove 207. The placement groove 207 is provided at the front side edge near the center of the upper end surface of the main body 1. At the center of the lower inner wall of the placement groove 207, a detection port 204 is provided. The lower end of the detection port 204 penetrates the lower inner wall of the placement groove 207 and leads to the inside of the main body 1. A cover plate 203 is provided at the upper end of the detection port 204. A push cover 201 is provided inside the placement groove 207. At the upper end edge near the center of the rear side wall of the push cover 201, a connection buckle 202 is fixedly connected. At the upper end near the center of the rear inner side wall of the placement groove 207, a connection hole 206 is provided. The connection hole 206 and the connection buckle 202 are mutually adapted.

[0045] The auxiliary structure 5 includes a card slot 502. At the center of the rear side wall of the card slot 502, a utility knife 503 is provided inside the card slot 502. Magnets 504 are respectively fixedly connected to the center of the front side wall of the utility knife 503 and the center of the rear inner side wall of the card slot 502. Notches 501 are respectively provided at the upper and lower inner side walls near the rear side edges at the upper and lower ends of the utility knife 503. When in use, by taking out the utility knife 503 from the inside of the card slot 502, it can be used for slicing and sampling operations on agricultural and livestock products, which is portable and more convenient for overall use. The cooperation of the two magnets 504 can facilitate the placement of the utility knife 503.

[0046] The detection structure 2 further includes two storage holes 208 which are respectively arranged at the positions close to the front sides of the centers of the two side walls of the main body 1. Inner threads 209 are arranged at the central edges of the inner side walls of the two storage holes 208. Suction cups 210 are fixedly connected to the centers of one inner side wall of the two storage holes 208. Sample bottles 205 are respectively arranged inside the two storage holes 208. When in use, by opening the push cover 201 and placing the collected sample inside the detection port 204, and at the same time taking out the sample bottle 205 from inside the storage hole 208, the collected sample can be backed up and retained. The cooperation of threaded connection and the suction cup 210 can ensure the stability of the sample bottle 205 when placed inside the storage hole 208.

[0047] The sensor module includes a temperature sensor, a humidity sensor, a pH sensor, a conductivity sensor, a heavy metal sensor, a pesticide residue sensor and a microorganism sensor. The specific steps are as follows:

[0048] S1. Initialization and self-check. After the host module starts and sends a start instruction to the sensor module, the sensor module first performs a power-on self-check, checks the connection status of each sensor to ensure the normal connection between the sensor and the signal processing circuit, verifies whether the power supply voltage of the sensor is within the normal range to avoid measurement errors caused by unstable voltage, and checks the standard status of each sensor to ensure that the sensor has not been recalibrated or interfered with after the last use;

[0049] S2. Sample collection and preparation. The sensor module receives an instruction from the host module and is ready to start sample detection. The user places the agricultural, livestock and aquatic product sample to be detected in the detection area. The sensor module detects the placement of the sample through a physical interface or an optical sensor. According to different detection parameters, the sensor module may need to preprocess the sample environment;

[0050] S3. Sensor working process. The sensor module activates the corresponding sensor according to the detection mode, and the sensor starts to work and collects various parameter data of the sample. The sensor converts the collected physical or chemical signal into an electrical signal. The sensor module performs preliminary processing on the collected analog signal, including amplification, filtering and analog-to-digital conversion;

[0051] S4. Data transmission and processing. The sensor module transmits the preprocessed digital signal to the host module by wired or wireless means. During the transmission process, the sensor module will perform data verification to ensure the integrity and accuracy of the data. During the data transmission process, the sensor module will temporarily cache the data in the local memory to prevent data loss. The cached data is cleared after successful transmission to release the storage space. The sensor module receives the feedback information from the host module to confirm whether the data is successfully received;

[0052] S5. Sensor Calibration and Maintenance. The sensor module needs to be calibrated regularly to ensure its measurement accuracy. The calibration process usually involves calibrating with standard samples. After use, the sensor module needs to be cleaned to prevent sample residues from affecting the next detection.

[0053] The signal processing module includes the following steps:

[0054] S1. Receive sensor signals. The signal processing module receives analog signals from each sensor through a dedicated signal input interface. The interface design needs to consider signal impedance matching and anti-interference ability to ensure that the signal is not lost and interfered during transmission. According to the types and functions of different sensors, the signal processing module classifies and identifies the received signals.

[0055] S2. Signal preprocessing. The analog signals output by the sensors are usually relatively weak. The signal processing module first amplifies the signals using a low-noise amplifier to increase the signal amplitude and signal-to-noise ratio. The amplification factor is set according to the output characteristics of the sensors and subsequent processing requirements, usually between 10 and 1000 times. To remove noise and interference in the signals, the signal processing module filters the amplified signals. A low-pass filter is used to filter out high-frequency noise, and a band-pass filter is used to retain useful signals within a specific frequency range. The preprocessed signals are calibrated to eliminate the errors and drifts of the sensors themselves. Using standard parameters pre-stored in the memory, the signals are linearized and compensated.

[0056] S3. Analog-to-digital conversion. According to the dynamic range and resolution requirements of the signals, a high-resolution ADC is selected to ensure the signal accuracy. The analog signals are sampled and quantized to convert continuous analog signals into discrete digital signals. The quantization process converts the amplitude values of the analog signals into digital signals. The converted digital signals are further digitally filtered to remove residual noise and interference.

[0057] S4. Signal analysis. Feature extraction is performed on the processed digital signals to extract characteristic parameters that have an important impact on the detection results. Preliminary data processing is performed on the extracted characteristic parameters, and the processed data is temporarily cached in the local memory.

[0058] The data transmission module includes the following steps:

[0059] S1. Initialization and self-check. When the device is powered on, the data transmission module first performs a power-on self-check to verify the supply voltage of each communication interface and ensure that it is within the normal operating range.

[0060] S2. Data Preparation and Encapsulation. The data transmission module receives the data to be transmitted from the signal processing module. The data is usually transmitted in the form of digital signals, which can be raw sensor data, processed analysis results, or user-set parameters. According to the requirements of the target terminal, the data is subjected to format conversion, and the converted data is encapsulated into data packets suitable for transmission. The data packet includes a data header, a data payload, and a checksum. The data header contains the source address, the target address, and the data length;

[0061] S3. Wireless Communication. The data transmission module attempts to connect to a pre-configured wireless network. After establishing the connection, the data transmission module sends the data to a preset server or cloud platform through the TCP / IP protocol. During the data transmission process, the module will conduct real-time monitoring to ensure the integrity and security of the data;

[0062] S4. Wired Communication. The user connects the device to a computer through a USB cable. After the data transmission module detects the USB connection, it initializes the USB interface and prepares for data transmission. The data transmission module sends the data to the connected terminal through the USB protocol. During the data transmission process, the data transmission module will perform data encryption to prevent the data from being stolen or tampered with;

[0063] S5. Data Transmission Monitoring and Feedback. The data transmission module monitors the status of data transmission in real time, including the connection status, the transmission rate, and the packet loss rate. If a transmission error is detected, the module will retransmit or prompt the user;

[0064] S6. The data transmission module monitors its own power status in real time to ensure that it operates within the normal working voltage range. In the standby state, the data transmission module will turn off unnecessary communication interfaces and functions to reduce power consumption;

[0065] S7. Fault Handling. The data transmission module monitors the status during the data transmission process in real time to detect potential faults and errors. When a fault is detected, the data transmission module will send a fault message to the attention module and attempt to automatically recover from the fault.

[0066] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable multi-parameter detector for agricultural, livestock and aquatic products, comprising a main body (1), characterized in that: A detection structure (2) is arranged at the center of the upper end surface of the main body (1) near the front edge, a display screen (7) is arranged on the upper end surface of the main body (1), a speaker (3) is arranged on the upper end surface of the main body (1) near the rear side of the display screen (7), a direction button (4) is arranged on the rear side of the speaker (3), and operation buttons (6) are arranged on the upper end surface of the main body (1) around the direction button (4), an auxiliary structure (5) is arranged at the center of the rear side wall of the main body (1), and a sensor module, a signal processing module and a data transmission module are arranged inside the main body (1); The detection structure (2) comprises a placement groove (207), the placement groove (207) being arranged at the center of the upper end surface of the main body (1) near the front side edge, a detection port (204) being arranged at the center of the lower inner wall of the placement groove (207), the lower end of the detection port (204) passing through the lower inner wall of the placement groove (207) and leading to the interior of the main body (1), a cover plate (203) being arranged at the upper end of the detection port (204), a push cover (201) being arranged inside the placement groove (207), a connection buckle (202) being fixedly connected at the center of the rear side wall of the push cover (201) near the upper end edge, a connection hole (206) being arranged at the center of the rear inner side wall of the placement groove (207) near the upper end, the connection hole (206) and the connection buckle (202) being adapted to each other.

2. The portable agricultural, livestock and aquatic product multi-parameter detector according to claim 1 is characterized by: The auxiliary structure (5) comprises a slot (502), a utility knife (503) is arranged at the center of the rear side wall of the slot (502), a magnet (504) is fixedly connected at the center of the front side wall of the utility knife (503) and the center of the rear inner side wall of the slot (502), and notches (501) are arranged at the center of the upper and lower inner side walls of the slot (502) at the upper and lower ends of the utility knife (503) and close to the rear edge.

3. The portable agricultural, livestock and aquatic product multi-parameter detector according to claim 1 is characterized by: The detection structure (2) also includes two storage holes (208), and the two storage holes (208) are respectively arranged at the front side of the center of the two side walls of the main body (1), and the center edges of the inner walls of the two storage holes (208) are provided with internal threads (209), and the center of one inner wall of the two storage holes (208) is fixedly connected with a suction cup (210), and the inside of the two storage holes (208) is respectively provided with a sample bottle (205).

4. The portable agricultural, livestock and aquatic product multi-parameter detector according to claim 1 is characterized in that: The sensor module includes a temperature sensor, a humidity sensor, a pH sensor, a conductivity sensor, a heavy metal sensor, a pesticide residue sensor and a microbial sensor, and specifically includes the following steps: S1. Initialization and self-test. When the host module starts and sends a startup command to the sensor module, the sensor module first performs a power-on self-test to check the connection status of each sensor, ensure that the connection between the sensor and the signal processing circuit is normal, verify whether the supply voltage of the sensor is within the normal range, avoid measurement errors caused by voltage instability, check the standard status of each sensor, and ensure that the sensor has not been recalibrated or disturbed since the last use; S2. Sample collection and preparation. The sensor module receives instructions from the host module and prepares to start sample detection. The user places the agricultural, livestock and aquatic product samples to be detected in the detection area. The sensor module detects the placement of the sample through a physical interface or an optical sensor. Depending on different detection parameters, the sensor module may need to pre-process the sample environment. S3. Sensor workflow: the sensor module activates the corresponding sensor according to the detection mode, the sensor starts working, collects various parameter data of the sample, the sensor converts the collected physical or chemical signals into electrical signals, and the sensor module performs preliminary processing on the collected analog signals, including amplification, filtering and analog-to-digital conversion; S4. Data transmission and processing: the sensor module transmits the pre-processed digital signal to the host module via wired or wireless means. During the transmission process, the sensor module will perform data verification to ensure the integrity and accuracy of the data. During the data transmission process, the sensor module will temporarily cache the data in the local memory to prevent data loss. The cached data will be cleared after the transmission is successful to release the storage space. The sensor module receives feedback information from the host module to confirm whether the data is successfully received; S5. Sensor calibration and maintenance. The sensor module needs to be calibrated regularly to ensure its measurement accuracy. The calibration process usually involves the use of standard samples for calibration. The sensor module needs to be cleaned after use to prevent sample residues from affecting the next detection.

5. The portable agricultural, livestock and aquatic product multi-parameter detector according to claim 1 is characterized by: The signal processing module comprises the following steps: S1. Receive sensor signals. The signal processing module receives analog signals from various sensors through a dedicated signal input interface. The interface design needs to consider the impedance matching and anti-interference ability of the signal to ensure that the signal is not lost or interfered during the transmission process. According to the type and function of different sensors, the signal processing module classifies and identifies the received signals; S2. Signal preprocessing: The analog signal output by the sensor is usually weak. The signal processing module first amplifies the signal using a low-noise amplifier to increase the amplitude and signal-to-noise ratio of the signal. The amplification factor is set according to the output characteristics of the sensor and the subsequent processing requirements, usually between 10 and 1000 times. In order to remove noise and interference in the signal, the signal processing module filters the amplified signal, uses a low-pass filter to filter out high-frequency noise, and uses a band-pass filter to retain useful signals within a specific frequency range. The preprocessed signal is calibrated to eliminate the error and drift of the sensor itself, and the signal is linearized and compensated using standard parameters pre-stored in the memory; S3. Analog-to-digital conversion: according to the dynamic range and resolution requirements of the signal, a high-resolution ADC is selected to ensure the accuracy of the signal, and the analog signal is sampled and quantized to convert the continuous analog signal into a discrete digital signal. The quantization process converts the amplitude value of the analog signal into a digital signal, and the converted digital signal is further digitally filtered to remove residual noise and interference; S4. Signal analysis: extract features from the processed digital signal, extract feature parameters that have an important impact on the detection results, perform preliminary data processing on the extracted feature parameters, and temporarily cache the processed data in the local memory.

6. The portable agricultural, livestock and aquatic product multi-parameter detector according to claim 1 is characterized by: The data transmission module comprises the following steps: S1. Initialization and self-test: When the device is powered on, the data transmission module first performs a power-on self-test to verify the power supply voltage of each communication interface to ensure that it is within the normal working range; S2. Data preparation and packaging. The data transmission module receives the data to be transmitted from the signal processing module. The data is usually transmitted in the form of digital signals, which can be raw sensor data, processed analysis results or user-set parameters. According to the requirements of the target terminal, the data format is converted and the converted data is packaged into a data packet suitable for transmission. The data header includes a data header, a data payload and a checksum. The data header contains the source address, the destination address and the data length. S3. Wireless communication, the data transmission module attempts to connect to the pre-configured wireless network. After the connection is established, the data transmission module sends the data to the preset server or cloud platform through the TCP / IP protocol. During the data transmission process, the module will conduct real-time monitoring to ensure the integrity and security of the data; S4. Wired communication, the user connects the device to the computer via a USB cable. After the data transmission module detects the USB connection, it initializes the USB interface and prepares for data transmission. The data transmission module sends the data to the connected terminal via the USB protocol. During the data transmission process, the data transmission module encrypts the data to prevent the data from being stolen or tampered with; S5. Data transmission monitoring and feedback. The data transmission module monitors the status of data transmission in real time, including connection status, transmission rate and packet loss rate. If a transmission error is detected, the module will restart or prompt the user; S6. The data transmission module monitors its own power status in real time to ensure that it operates within the normal operating voltage range. In the standby state, the data transmission module will shut down unnecessary communication interfaces and functions to reduce energy consumption; S7. Fault handling,The data transmission module monitors the status of the data transmission process in real time,detects potential faults and errors, and when a fault is detected, the data transmission module sends fault information to the attention module,and the data transmission module tries to automatically recover from the fault.

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