A water meter

Abstract

The utility model relates to a kind of moisture determinator, it is related to substance component detection technical field.The moisture determinator, through the synergic detection of flexible electrode array and microwave sensor, in combination with the wideband excitation of multi-frequency signal generator, covers wide range moisture detection range, especially solves the detection problem of non-conductive sample, simultaneously, environmental compensation sensor group and the design of shielding shell, can dynamically correct the influence of temperature and humidity, air pressure and electromagnetic interference, cooperate with pressure sensor to monitor the contact state, the precision of traditional model is improved several times, the color and flicker frequency of prompt light are real-time feedback equipment state, cooperate with display unit and directly present detection result, zero base user can quickly get started, in addition, the comfort of hand-held operation is improved by the design of handle and lightweight structure, adapt to agricultural field, chemical plant, building material warehouse and other multi-scene mobile detection, solve the pain point of traditional laboratory model cumbersome, portable model simple function.

Description

Technical Field

[0001] This utility model relates to the field of material composition detection technology, and in particular to a moisture analyzer. Background Technology

[0002] In agriculture, chemical industry, food, and building materials, moisture content is a core indicator for measuring product quality, storage stability, and processing suitability. For example, excessive moisture in grains can easily lead to mold growth; excessive moisture in plastic granules can cause injection molding defects; and improper moisture control in milk powder can affect its reconstitution properties. Therefore, moisture analyzers have become crucial equipment in the production and quality inspection processes of various industries. Currently, the mainstream moisture determination technologies are mainly divided into the drying weight loss method, Karl Fischer method, near-infrared spectroscopy, and capacitance-resistance method. Among them, the capacitance-resistance method is widely used in rapid on-site testing scenarios due to its advantages of portability, fast detection speed, and low cost, such as field yield measurement at grain purchasing stations, timber sampling inspection in building materials markets, and initial screening of raw materials in chemical workshops. It is particularly suitable for mobile testing needs in non-laboratory environments.

[0003] Existing capacitive resistance moisture analyzers suffer from numerous technical challenges in practical applications, failing to meet the demands for high-precision, multi-scenario testing: They have narrow detection ranges and poor sample adaptability. Traditional capacitive resistance methods rely on a single low-frequency signal to detect the dielectric properties of samples. For low-moisture samples, the capacitance / resistance signal changes are weak, resulting in detection errors of ±1%-3%, or even failure to output valid data. They are completely ineffective with non-conductive samples, as non-conductive materials cannot form a current loop, causing the resistance signal to approach infinity, preventing the instrument from recognizing moisture changes. Furthermore, detection accuracy is easily affected by external interference. Fluctuations in ambient temperature and humidity significantly impact the results: a 10°C change in temperature can lead to a capacitance deviation of up to 0.05 pF. In high-humidity environments, condensation on the sample surface can be misinterpreted as internal moisture, resulting in overestimation by 1%-2%. Additionally, the contact between the probe and the sample is often inadequate. Effective monitoring is crucial. If the electrode is inserted too shallowly or tilted during manual operation, insufficient contact between the electrode and the sample can lead to deviations of ±0.8% or more in repeated testing of the same sample. Operational convenience and status feedback are also insufficient. Traditional portable models often lack intuitive status indicators, requiring users to rely on experience to determine whether testing has started or completed. Novices are prone to data invalidation due to improper operation. Furthermore, most models lack integrated environmental compensation functions, requiring manual recording of environmental parameters and correction of results, which is not only time-consuming but also prone to introducing human error. A balance between performance and portability is difficult to achieve. While laboratory-grade capacitance and resistance meters offer high accuracy, their large size and external power supply make them unsuitable for field use. Handheld portable models, to reduce size and simplify circuitry, often omit signal filtering and temperature compensation modules, reducing accuracy to ±1% or more. These are only suitable for rough screening and cannot meet the compliance testing requirements of the food and chemical industries.

[0004] Furthermore, other mainstream detection technologies also have limitations that make them difficult to replace the capacitance-resistance method in certain scenarios: while the drying-and-weight-loss method offers high accuracy, it is time-consuming and requires sample destruction, making it unsuitable for rapid on-site detection; the Karl Fischer method can measure trace moisture, but it requires expensive reagents and is only applicable to soluble samples, resulting in high maintenance costs; while near-infrared spectroscopy is non-destructive and rapid, the instrument is expensive and highly susceptible to sample color / particle size, making it unaffordable for small and medium-sized customers. Therefore, the industry urgently needs a moisture analyzer that can overcome the limitations of the traditional capacitance-resistance method, while also offering a wide detection range, high anti-interference capability, portability, and low cost, to meet the practical needs of high-precision on-site detection in various industries. Summary of the Invention

[0005] This utility model mainly solves the technical problems existing in the prior art and provides a moisture analyzer, including an instrument body, a probe shell fixedly connected to one side of the instrument body, a handle fixedly connected to the bottom of the instrument body, a contact surface fixedly connected to the probe shell, a temperature sensor fixedly connected to the probe shell, a flexible electrode array disposed inside the probe shell, a microwave sensor disposed in the middle of the flexible electrode array, a pressure sensor disposed around the flexible electrode array, and an FPC circuit board disposed inside the probe shell.

[0006] The instrument body is fixedly connected to a PCB board, a multi-frequency signal generator is fixedly connected to the PCB board, a capacitance and resistance detector is fixedly connected to the PCB board, a microwave signal processing module is fixedly connected to the PCB board, a main controller is fixedly connected to the PCB board, a power management module is fixedly connected to the PCB board, and a shielding shell is fixedly connected to the periphery of the PCB board.

[0007] The instrument body is equipped with a battery compartment, an environmental compensation sensor group is fixedly connected to the instrument body, a charging port is provided on the instrument body, a display unit is provided on one side of the charging port, and an indicator light is fixedly connected to the instrument body.

[0008] Preferably, the flexible electrode array is a 5×5 array structure, with each electrode made of gold-plated copper sheet and covered with medical-grade silicone.

[0009] Preferably, the number of pressure sensors is four, which are distributed at the four corners of the flexible electrode array, and they are piezoresistive sensors.

[0010] Preferably, the shielding shell is grounded to the PCB board.

[0011] Preferably, the FPC circuit board is fixed to the flexible electrode array, microwave sensor, and pressure sensor by a combination of conductive adhesive bonding and laser welding.

[0012] Preferably, the output of the multi-frequency signal generator is connected to the flexible electrode array via an FPC circuit board, and is used to apply excitation signals of different frequencies to the sample according to the instructions of the main controller.

[0013] Preferably, the environmental compensation sensor group includes a temperature and humidity sensor and a barometric pressure sensor, the signal output of which is electrically connected to the main controller to provide environmental parameters to the main controller to correct the detection results.

[0014] Preferably, the data input terminal of the display unit is connected to the main controller and is used to receive and display the moisture detection value and operation interface output by the main controller.

[0015] Preferably, the indicator light is electrically connected to the main controller and can provide feedback on the device status through different colors and flashing frequencies under the control of the main controller.

[0016] The beneficial effects of this utility model are:

[0017] 1. This moisture analyzer, through the coordinated detection of a flexible electrode array and a microwave sensor, combined with the wide-band excitation of a multi-frequency signal generator, covers a wide range of moisture detection, especially solving the detection problem of non-conductive samples. At the same time, the design of the environmental compensation sensor group and the shielding shell can dynamically correct the influence of temperature, humidity, air pressure and electromagnetic interference. With the monitoring of the contact state by the pressure sensor, the detection error is controlled within ±0.2%, and the accuracy is more than 5 times higher than that of traditional models.

[0018] 2. This moisture analyzer provides real-time feedback on the device status through the color and flashing frequency of the indicator lights, and directly presents the test results on the display unit. Users with no prior experience can quickly get started. In addition, the handle design and lightweight structure improve the comfort of handheld operation, making it suitable for mobile testing in various scenarios such as agricultural sites, chemical workshops, and building material warehouses. It solves the pain points of traditional laboratory models being bulky and portable models having limited functions, achieving an integrated design of high precision, easy operation, and wide compatibility. Attached Figure Description

[0019] Figure 1 This is an isometric schematic diagram of a moisture analyzer according to the present invention;

[0020] Figure 2 This is a cross-sectional schematic diagram of a moisture analyzer according to the present invention;

[0021] Figure 3 This is a cross-sectional schematic diagram of a moisture analyzer according to the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of a moisture analyzer according to the present invention.

[0023] Reference numerals: 1. Instrument body; 2. Probe housing; 3. Handle; 4. Contact surface; 5. Temperature sensor; 6. Flexible electrode array; 7. Microwave sensor; 8. Pressure sensor; 9. FPC circuit board; 10. PCB board; 11. Multi-frequency signal generator; 12. Capacitor-resistance detector; 13. Microwave signal processing module; 14. Main controller; 15. Power management module; 16. Shielding shell; 17. Battery compartment; 18. Environmental compensation sensor group; 19. Charging port; 20. Display unit; 21. Indicator light. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0025] Example: A moisture analyzer, such as Figures 1-4 As shown:

[0026] A moisture analyzer includes an instrument body 1, a probe housing 2 fixedly connected to one side of the instrument body 1, a handle 3 fixedly connected to the bottom of the instrument body 1, a contact surface 4 fixedly connected to the probe housing 2, a temperature sensor 5 fixedly connected to the probe housing 2, a flexible electrode array 6 disposed inside the probe housing 2, a microwave sensor 7 disposed in the middle of the flexible electrode array 6, a pressure sensor 8 disposed around the flexible electrode array 6, and an FPC circuit board 9 disposed inside the probe housing 2.

[0027] A PCB board 10 is fixedly connected inside the instrument body 1. A multi-frequency signal generator 11 is fixedly connected to the PCB board 10. A capacitance-resistance detector 12 is fixedly connected to the PCB board 10. A microwave signal processing module 13 is fixedly connected to the PCB board 10. A main controller 14 is fixedly connected to the PCB board 10. A power management module 15 is fixedly connected to the PCB board 10. A shielding shell 16 is fixedly connected to the periphery of the PCB board 10.

[0028] The microwave sensor 7 in the middle of the flexible electrode array 6 emits a microwave signal, which is reflected and received after penetrating the sample. The microwave signal processing module 13 calculates the microwave attenuation.

[0029] The shielding shell 16 blocks external electromagnetic interference, ensuring signal stability;

[0030] The instrument body 1 is equipped with a battery compartment 17, an environmental compensation sensor group 18 is fixedly connected to the instrument body 1, a charging port 19 is provided on the instrument body 1, a display unit 20 is provided on one side of the charging port 19 of the instrument body 1, and an indicator light 21 is fixedly connected to the instrument body 1.

[0031] The pressure sensor 8 on the periphery of the flexible electrode array 6 inside the probe housing 2 monitors the contact pressure in real time. If the pressure is within the standard range, the pressure sensor 8 transmits the signal to the main controller 14 via the FPC circuit board 9, and the indicator light 21 turns blue and stays on, indicating that the test can start. If the pressure is insufficient, the indicator light 21 turns red and flashes.

[0032] Working principle: Before testing, the user turns on the instrument power. The indicator light 21 on the instrument body 1 lights up solid green, indicating that the device initialization is complete. The power management module 15 supplies power to the system, and the lithium battery in the battery compartment 17 has a normal charge. The user holds the handle 3 and places the contact surface 4 of the probe shell 2 against the sample to be tested, such as grains, plastics, or wood. At this time, the pressure sensor 8 around the flexible electrode array 6 inside the probe shell 2 monitors the contact pressure in real time. If the pressure is up to standard, the pressure sensor 8 transmits the signal to the main controller 14 through the FPC circuit board 9, and the indicator light 21 turns solid blue, indicating that the test can begin. If the pressure is insufficient, the indicator light 21 turns red and flashes, accompanied by a short flashing frequency of once per second. The main controller 14 locks the test function synchronously until the user adjusts the contact state to meet the pressure standard, avoiding signal errors caused by poor contact.

[0033] After the detection is started, the multi-frequency signal generator 11 on the PCB board 10 inside the instrument body 1 starts, generating a wideband alternating signal, which is transmitted to the flexible electrode array 6 via the FPC circuit board 9. The low-frequency signal acts on the sample, and the capacitance-resistance detector 12 simultaneously collects the capacitance and resistance values ​​between the electrodes. High-moisture samples have strong conductivity, low resistance, and significant capacitance changes; low-moisture samples exhibit high resistance characteristics. The high-frequency signal penetrates the surface of non-conductive samples, such as plastics and ceramics, and captures the internal moisture polarization response, making up for the detection blind spot of the traditional capacitance method. At the same time, the microwave sensor 7 in the middle of the flexible electrode array 6 emits a microwave signal, which is reflected and received after penetrating the sample. The microwave signal processing module 13 calculates the microwave attenuation. The higher the moisture content, the more significant the attenuation. This signal complements the capacitance-resistance signal: for high-salt / high-sugar samples, the microwave signal avoids interference from ionic conductivity; for dry granular samples, the capacitance-resistance signal dominates the detection, and the microwave signal assists in correcting the particle gap error.

[0034] During signal acquisition, the temperature sensor 5 on the probe housing 2 detects the sample surface temperature, and the environmental compensation sensor group 18 on the instrument body 1 simultaneously collects ambient temperature, humidity and air pressure data. The data are transmitted to the main controller 14 via the FPC circuit board 9 and PCB board 10. The main controller 14 calls the temperature and capacitance correction model, humidity and resistance compensation coefficient to dynamically calibrate the signal, and blocks external electromagnetic interference through the shielding shell 16 to ensure signal stability.

[0035] The main controller 14 performs multi-step processing on the calibrated data, matches the built-in industry standard sample database, automatically calls the corresponding calibration curve, dynamically weights and fuses capacitance, resistance and microwave signals, combines the contact stability data of pressure sensor 8, filters outliers, and finally calculates the moisture value.

[0036] After the test is completed, the indicator light 21 changes from solid blue to flashing green, indicating that the test is over. The results can be viewed through the instrument display unit 20. If an abnormality occurs during the test, the indicator light 21 turns orange and flashes slowly. The power management module 15 simultaneously triggers a low battery reminder, and the user can connect to a power source to charge the device through the charging port 19.

[0037] Structural Description:

[0038] The instrument body 1 serves as the core support frame of the entire moisture analyzer, integrating all functional components such as the fixed probe shell 2, handle 3, and PCB board 10 into an integrated structure. This design avoids space waste and loose connections caused by the dispersion of components, making the instrument compact and suitable for handheld use, while also withstanding the pressure and impact during testing, ensuring the stable operation of internal modules, and adapting to mobile testing in multiple scenarios.

[0039] The probe housing 2 is fixed to one side of the instrument body 1. It encapsulates components such as the flexible electrode array 6 and microwave sensor 7 inside, and fixes the contact surface 4 and temperature sensor 5 on the outside. It physically protects the internal precision components and prevents sample debris and dust from entering. At the same time, the housing shape ensures the flatness of the contact surface 4 and the sample, avoids detection errors caused by component displacement, and extends the probe life.

[0040] The handle 3 is fixed below the instrument body 1, providing a grip for handheld operation. The surface can be provided with anti-slip texture. It conforms to ergonomic design, which can help users stably control the contact angle and pressure between the probe and the sample, avoid the deviation caused by hand slippage, balance the center of gravity of the instrument, reduce hand fatigue during long-term operation, and improve comfort.

[0041] The contact surface 4 is fixed to the front end of the probe housing 2 and is made of wear-resistant and waterproof medical-grade silicone material, which directly contacts the sample. The flexibility of silicone can conform to the surface of samples of different shapes, ensuring that the flexible electrode array 6 and pressure sensor 8 are in full contact with the sample. Its waterproof and wear-resistant properties are suitable for wet and rough sample scenarios, avoiding damage to the contact surface 4.

[0042] Temperature sensor 5 is fixed next to the contact surface 4 of probe housing 2, with the probe end close to the sample surface; it can collect the sample surface temperature in real time, providing basic parameters for the signal calibration of main controller 14, such as correcting the capacitance value deviation caused by temperature rise, and avoiding a moisture detection error of 0.3%-0.5% caused by temperature fluctuation.

[0043] The flexible electrode array 6 is set inside the probe housing 2 in a 5×5 array structure, with a microwave sensor 7 in the middle and a pressure sensor 8 surrounding it. It is connected to the PCB board 10 through the FPC circuit board 9. The flexible material can deform with the contact surface 4 to ensure that each electrode is in contact with the sample, avoiding poor local contact of traditional rigid electrodes. The array layout covers a larger area, reducing the error of uneven local moisture in the sample. The high-frequency signal can also penetrate the surface of non-conductive samples, breaking through the detection blind zone.

[0044] The microwave sensor 7 is located in the middle of the flexible electrode array 6 and is connected to the microwave signal processing module 13 of the PCB board 10 via the FPC circuit board 9. It can transmit and receive 2.45GHz microwave signals. Microwaves can penetrate the interior of the sample, and the attenuation reflects the moisture content. It complements the capacitance and resistance signals, avoids ion interference for high-salt / high-sugar samples, corrects gap deviations for dry particle samples, and improves the detection accuracy to ±0.2%.

[0045] There are four pressure sensors 8, distributed at the four corners of the flexible electrode array 6, and connected to the main controller 14 through the FPC circuit board 9. The sensors can monitor the contact pressure in real time. When the pressure meets the standard, the main controller 14 is fed back to turn the indicator light 21 blue to indicate that it can be detected. When the pressure is insufficient, the red light flashes and the detection is locked to avoid repeated detection deviations caused by shallow contact or tilting, thus reducing the operating threshold.

[0046] The FPC circuit board 9 is located inside the probe housing 2, with one end connected to components such as the temperature sensor 5 and the flexible electrode array 6, and the other end extending into the instrument body 1 to connect to the PCB board 10. Its 0.1mm thickness and flexible bendable characteristics are adapted to the compact space and curved structure of the probe, avoiding the wiring difficulties and easy breakage problems of traditional rigid circuit boards. The dual fixation of conductive adhesive bonding and laser welding ensures stable signal transmission, reduces signal attenuation, and ensures data accuracy.

[0047] The PCB board 10 is fixed inside the instrument body 1 and serves as the mounting carrier for core circuit modules such as the multi-frequency signal generator 11 and the main controller 14. This enables integrated module layout, reduces scattered wiring, saves 30% of internal space, and facilitates later maintenance, thus reducing repair costs.

[0048] The multi-frequency signal generator 11 is fixed on the PCB board 10, and the output end is connected to the flexible electrode array 6 through the FPC circuit board 9, which can generate a wideband signal of 1kHz-100MHz. The low frequency band is suitable for the detection of high moisture samples, and the moisture is distinguished by the difference in conductivity. The high frequency band penetrates the surface of non-conductive samples and captures the internal moisture polarization response, extending the detection range from the traditional ≥5% moisture to 0.1%-90% moisture, covering more industry needs.

[0049] The capacitance-resistance detector 12 is fixed on the PCB board 10. The input end is connected to the flexible electrode array 6 through the FPC circuit board 9, which can convert the analog signal into digital capacitance and resistance values. The capacitance and resistance data under multi-frequency signals are collected in real time to provide basic detection data for the main controller 14. The moisture range can be initially determined by the difference in conductivity between high and low moisture samples, thereby improving the efficiency of subsequent calculations.

[0050] The microwave signal processing module 13 is fixed on the PCB board 10 and its input is connected to the microwave sensor 7. It can amplify, filter, demodulate the microwave reflected signal and calculate the attenuation. It can quickly analyze moisture information and complement and correct it with capacitance and resistance data. For example, when detecting cured meat, it avoids the interference of salt ions on the resistance signal and solves the pain points of traditional capacitance method and large error in high-salt samples.

[0051] The main controller 14 is fixed on the PCB board 10 and serves as the core computing and control unit. It is connected to modules such as the capacitance and resistance detector 12 and the indicator light 21. It can receive data from various sensors, call dynamic calibration signals such as temperature and capacitance correction models, and calculate the moisture value through a weighted fusion algorithm. At the same time, it controls the indicator light 21 to provide feedback status and the display unit 20 to output results, realizing full automation of the detection, calibration and feedback process without manual intervention. The detection efficiency is ≤3 seconds per sample.

[0052] The power management module 15 is fixed on the PCB board 10. Its input end is connected to the battery compartment 17 and the charging port 19, and its output end supplies power to each module. It has a built-in lithium battery protection chip and a DC-DC converter. It can convert the 3.7V lithium battery voltage to a stable 3.3V / 5V voltage to avoid signal interference caused by voltage fluctuations. It has overcharge and over-discharge protection to extend the lithium battery life. When the battery is low, the indicator light 21 flashes orange slowly to remind you to charge, ensuring that the device can continue to be used.

[0053] The shielding shell 16 is fixed around the PCB board 10. It is made of aluminum alloy and connected to the grounding terminal of the PCB board 10, covering all circuit modules. It can effectively block external electromagnetic interference, reduce electromagnetic noise to below -60dB, and prevent interference signals from affecting the acquisition and transmission of capacitor, resistor and microwave signals. For example, it can prevent capacitance value jumps during testing in chemical workshops, ensure error ≤ ±0.2%, and ensure data reliability.

[0054] The battery compartment 17 is located inside the instrument body 1 and is connected to the power management module 15. It holds a 3.7V rechargeable lithium battery, providing mobile power supply for the device without the need for an external power source. It is suitable for power-free scenarios such as fields and warehouses. The lithium battery has a battery life of up to 8 hours and is replaceable, avoiding detection interruptions caused by running out of power and improving on-site work efficiency.

[0055] The environmental compensation sensor group 18 is fixed on the instrument body 1, including a temperature and humidity sensor and a barometric pressure sensor, and its output is connected to the main controller 14. It collects environmental temperature, humidity and barometric pressure data in real time, and provides the main controller 14 with correction basis. For example, it automatically corrects the capacitance value by -0.02pF for every 1°C increase in temperature. In high humidity environment, it eliminates condensation interference by comparing surface temperature and dew point, so that the equipment can maintain high accuracy in special environment and improve adaptability.

[0056] The charging port 19 is located on the instrument body 1 and is connected to the power management module 15. It adopts a Type-C interface and supports fast charging of lithium batteries. The universal interface design makes it convenient for users to charge in emergency situations on site without the need for a dedicated charger. The IP65-level waterproof and dustproof design prevents moisture and dust from the sample from damaging the circuit and extends the life of the equipment.

[0057] The display unit 20 is located on one side of the charging port 19 of the instrument body 1. It adopts a 2.4-inch capacitive touch screen and is connected to the main controller 14. It can intuitively display test results, environmental parameters and operation interface. The backlight adjustment ensures clear visibility in both strong and low light environments. The capacitive touch operation is convenient, and users can quickly switch modes without complicated buttons, reducing the threshold for use.

[0058] Indicator light 21 is fixed on the instrument body 1 and connected to the main controller 14. It provides feedback on the device status through different colors and flashing frequencies. Visual prompts simplify operation: a green solid light indicates initialization is complete, a blue solid light indicates contact is up to standard, a red flashing light indicates insufficient pressure, a green flashing light indicates the end of detection, and an orange slow flashing light indicates low battery. This allows users to determine the status without a manual, avoiding invalid detection. Even beginners can get started in 5 minutes.

[0059] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A moisture analyzer, comprising an instrument body (1), characterized in that: A probe housing (2) is fixedly connected to one side of the instrument body (1), a handle (3) is fixedly connected to the bottom of the instrument body (1), a contact surface (4) is fixedly connected to the probe housing (2), a temperature sensor (5) is fixedly connected to the probe housing (2), a flexible electrode array (6) is provided inside the probe housing (2), a microwave sensor (7) is provided in the middle of the flexible electrode array (6), a pressure sensor (8) is provided around the flexible electrode array (6), and an FPC circuit board is provided inside the probe housing (2). A PCB board (10) is fixedly connected inside the instrument body (1). A multi-frequency signal generator (11) is fixedly connected on the PCB board (10). A capacitance-resistance detector (12) is fixedly connected on the PCB board (10). A microwave signal processing module (13) is fixedly connected on the PCB board (10). A main controller (14) is fixedly connected on the PCB board (10). A power management module (15) is fixedly connected on the PCB board (10). A shielding shell (16) is fixedly connected around the PCB board (10). The instrument body (1) is provided with a battery compartment (17), an environmental compensation sensor group (18) is fixedly connected to the instrument body (1), a charging port (19) is provided on the instrument body (1), a display unit (20) is provided on one side of the charging port (19) of the instrument body (1), and an indicator light (21) is fixedly connected to the instrument body (1).

2. A moisture analyzer according to claim 1, characterized in that: The flexible electrode array (6) is a 5×5 array structure, with each electrode made of gold-plated copper sheet and covered with medical-grade silicone.

3. A moisture analyzer according to claim 2, characterized in that: The pressure sensors (8) are four in number, distributed at the four corners of the flexible electrode array (6), and are piezoresistive sensors.

4. A moisture analyzer according to claim 3, characterized in that: The shielding shell (16) is grounded to the PCB board (10).

5. A moisture analyzer according to claim 4, characterized in that: The FPC circuit board is fixed to the flexible electrode array (6), microwave sensor (7), and pressure sensor (8) by both conductive adhesive bonding and laser welding.

6. A moisture analyzer according to claim 5, characterized in that: The output of the multi-frequency signal generator (11) is connected to the flexible electrode array (6) via an FPC circuit board, and is used to apply excitation signals of different frequencies to the sample according to the instructions of the main controller (14).

7. A moisture analyzer according to claim 6, characterized in that: The environmental compensation sensor group (18) includes a temperature and humidity sensor and a barometric pressure sensor. Its signal output terminal is electrically connected to the main controller (14) to provide environmental parameters to the main controller (14) to correct the detection results.

8. A moisture analyzer according to claim 7, characterized in that: The data input terminal of the display unit (20) is connected to the main controller (14) and is used to receive and display the moisture detection value and operation interface output by the main controller (14).

9. A moisture analyzer according to claim 8, characterized in that: The indicator light (21) is electrically connected to the main controller (14) and can provide feedback on the device status through different colors and flashing frequencies under the control of the main controller (14).

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