Experimental animal feeding environment monitoring system based on RFID technology

Abstract

The invention discloses an experimental animal feeding environment monitoring system based on an RFID technology, and relates to the technical field of life science research, and the system comprises a humidity monitoring module which is used for converting the humidity of padding into a first capacitance value and transmitting the first capacitance value to an RFID reader-writer device to analyze a humidity value; and / or the drinking water monitoring module is used for converting the water volume of the drinking water bottle into a second capacitance value and transmitting the second capacitance value to the RFID reader-writer device so as to analyze the water volume value; and / or the water leakage monitoring module is used for converting the water leakage state of the water dispenser into a third capacitance value and transmitting the third capacitance value to the RFID reader-writer device so as to analyze a water leakage state judgment value. When the system is applied to experimental animal feeding, the technical problem that the experimental animal feeding environment monitoring efficiency is low can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of life science research, and in particular to an experimental animal breeding environment monitoring system based on RFID technology. Background Art

[0002] With the development of life science and technology and people's increasing attention to life and health, the market demand for laboratory animals is increasing. The efficient operation of laboratory animal breeding facilities depends on the accurate monitoring of the breeding environment. Water is an essential element for animal survival. In the breeding of laboratory animals, water affects the environmental humidity and drinking water supply required for the survival of laboratory animals. Excessive water can cause discomfort or even danger to laboratory animals. Regarding the monitoring of the water-related laboratory animal breeding environment, the existing technology still has the following deficiencies: Replacing litter in animal enclosures is one of the most arduous tasks in laboratory animal facilities. Conventional wisdom suggests changing litter every seven days to ensure dryness, improve animal welfare, and safeguard animal quality. However, in many cases, litter is still dry even after seven days, especially when a single cage is small. However, existing technologies lack effective methods for monitoring litter moisture.

[0003] For animal husbandry without automatic drinking systems, the animals are often provided with a 250-300ml water bottle. Staff replace the bottle or refill it with drinking water every three days on average. However, in practice, this often means the water is completely consumed before it's replaced, or when there are fewer animals, only a small amount of water needs to be replaced. Water shortages can lead to animal welfare issues and affect animal growth quality. Replacing water before it's completely consumed is wasteful, especially since drinking water for experimental animals must be sterilized at high temperatures and high pressures. Therefore, changing the water bottle is the most energy-intensive task within the animal facility. However, existing technologies lack effective means to monitor the water level in drinking bottles.

[0004] In large-scale experimental animal production facilities, animal feeding containers are connected to an automatic drinking water supply system, with a drinking valve introducing sterilized water into the container cavity. However, due to environmental factors, animal activity, and technical limitations, the drinking valve is prone to leakage. If these leaks are not detected and addressed promptly, the animals in the container can drown, resulting in economic losses. If such problems occur in core populations, animal production can be significantly impacted, necessitating the re-establishment of the base animal population. However, existing technologies lack effective means to monitor water leaks in animal containers. Summary of the Invention

[0005] In order to solve one or more technical problems in the prior art, the present invention provides an experimental animal breeding environment monitoring system based on RFID technology, comprising: a humidity monitoring module, configured to convert the humidity of the bedding material into a first capacitance value and transmit the first capacitance value to an RFID reader device for analyzing the humidity value, wherein the humidity monitoring module includes a first sensor unit, the first sensor unit includes a first electrode pair, and the first electrode pair is arranged on both sides of the bedding material, so that the first capacitance value changes with the humidity of the bedding material; and / or a water drinking monitoring module, configured to convert the amount of water in the water bottle into a second capacitance value and transmit the second capacitance value to an RFID reader / writer device to parse the water amount value, wherein the water drinking monitoring module includes a second sensor unit, the second sensor unit includes a second electrode pair, and the second electrode pair is disposed on an outer wall of the water bottle, so that the second capacitance value changes with the amount of water in the water bottle; And / or, a water leakage monitoring module, used to convert the water leakage state of the water dispenser into a third capacitance value and transmit the third capacitance value to the RFID reader device to parse the water leakage state judgment value, wherein the water leakage monitoring module includes a third sensor unit, the third sensor unit includes a third electrode pair, and the third electrode pair is arranged below the water outlet of the water dispenser, so that the third capacitance value changes with the water leakage state of the water dispenser.

[0006] Preferably: The humidity monitoring module further includes a first analog-to-digital conversion unit, a first storage unit, and a first communication unit. The first sensor unit detects the humidity of the bedding material through the first electrode pair and converts it into a first capacitance value. The first analog-to-digital conversion unit converts the first capacitance value into a first digital signal value. The first storage unit receives the first digital signal value from the first analog-to-digital conversion unit and records it. The first communication unit receives an energy signal from the RFID reader device and converts it into the electrical energy required to drive the first sensor unit, the first analog-to-digital conversion unit, and the first storage unit. The communication unit obtains the first digital signal value from the first storage unit and transmits it back to the RFID reader device via a carrier wave. The RFID reader device parses the humidity value based on the first digital signal value. And / or, the drinking water monitoring module further includes a second analog-to-digital conversion unit, a second storage unit, and a second communication unit, wherein the second sensor unit detects the amount of water in the drinking bottle through the second electrode pair and converts the detected amount into a second capacitance value, the second analog-to-digital conversion unit converts the second capacitance value into a second digital signal, the second storage unit receives and records the second digital signal from the second analog-to-digital conversion unit, the second communication unit receives an energy signal from the RFID reader / writer device and converts the signal into electrical energy required to drive the second sensor unit, the second analog-to-digital conversion unit, and the second storage unit, obtains a second digital signal value from the second storage unit, and transmits the signal back to the RFID reader / writer device via a carrier wave, and the RFID reader / writer device parses the water amount value according to the second digital signal value; And / or, the water leakage monitoring module also includes a third analog-to-digital conversion unit, a third storage unit and a third communication unit, the third sensor unit detects the water leakage state of the water dispenser through the third electrode pair and converts it into a third capacitance value, the third analog-to-digital conversion unit converts the third capacitance value into a third digital signal, the third storage unit receives the third digital signal from the third analog-to-digital conversion unit and records it, the third communication unit receives the energy signal of the RFID reader device to convert it into the electrical energy required to drive the third sensor unit, the third analog-to-digital conversion unit and the third storage unit, and obtains the third digital signal value from the third storage unit and transmits it back to the RFID reader device through a carrier wave, and the RFID reader device parses the water leakage state judgment value according to the third digital signal value.

[0007] Preferably: The first communication unit includes a first RFID chip and a first antenna, the first antenna receives the energy signal of the RFID reader and writer device to convert it into electrical energy, and uses this power to power the first sensor unit, the first analog-to-digital conversion unit, the first storage unit and the first RFID chip. The first RFID chip obtains a first digital signal value from the first storage unit, and integrates the first digital signal value with the EPC encoding of the first RFID chip itself to obtain a first integrated EPC encoding. The first antenna returns the first integrated EPC encoding to the RFID reader and writer device through a carrier, and the RFID reader and writer device analyzes the humidity value according to the first integrated EPC encoding; And / or, the second communication unit includes a second RFID chip and a second antenna, the second antenna receives an energy signal from the RFID reader device and converts it into electrical energy, and uses this electrical energy to power the second sensor unit, the second analog-to-digital conversion unit, the second storage unit, and the second RFID chip, the second RFID chip obtains a second digital signal value from the second storage unit, and integrates the second digital signal value with the EPC code of the second RFID chip itself to obtain a second integrated EPC code, the second antenna transmits the second integrated EPC code back to the RFID reader device via a carrier wave, and the RFID reader device parses the water output value according to the second integrated EPC code; And / or, the third communication unit includes a third RFID chip and a third antenna, the third antenna receives the energy signal of the RFID reader device and converts it into electrical energy, and uses this electrical energy to power the third sensor unit, the third analog-to-digital conversion unit, the third storage unit and the third RFID chip, the third RFID chip obtains a third digital signal value from the third storage unit, and integrates the third digital signal value with the EPC code of the third RFID chip itself to obtain a third integrated EPC code, the third antenna transmits the third integrated EPC code back to the RFID reader device via a carrier, and the RFID reader device parses the water leakage status judgment value according to the third integrated EPC code.

[0008] Preferably: The padding is laid on the inner side of the cage bottom, and the humidity monitoring module is arranged on the outer side of the cage bottom. The two electrode plates of the first electrode pair are symmetrically arranged on the left and right sides of the cage bottom.

[0009] Preferably: The drinking water monitoring module is arranged on the outside of the drinking water bottle, wherein the two electrode plates of the second electrode pair are connected in parallel to the outside of the side wall of the drinking water bottle.

[0010] Preferably, the water leakage monitoring module is arranged on the cage box bracket, and when the cage box is inserted into the cage box bracket, the cage box is attached to the water leakage monitoring module.

[0011] Preferably, the third electrode pair includes a third electrode pair parallel section and a third electrode pair interdigital section, the third electrode pair parallel section extends from the outside of the cage box front wall to the outside of the cage box bottom wall, and the third electrode pair interdigital section is located outside the cage box bottom wall.

[0012] Preferably: The water leakage monitoring module is arranged on the outside of the cage box, and the water leakage monitoring module also includes a third packaging unit, a ring card and a ring buckle. The third sensor unit, the third analog-to-digital conversion unit, the third storage unit and the third communication unit are encapsulated in the third packaging unit, the ring card is connected to the third packaging unit, and the ring buckle is connected to the front wall of the cage box. The third packaging unit is connected to the outside of the front wall of the cage box through the buckle relationship between the ring card and the ring buckle.

[0013] Preferably: The first electrode pair is a flexible electrode pair; And / or, the second electrode pair is a flexible electrode pair; And / or, the third electrode pair is a flexible electrode pair.

[0014] Preferably: The first sensor unit is connected to the first analog-to-digital conversion unit via a conductive adhesive; And / or, the second sensor unit is connected to the second analog-to-digital conversion unit via a conductive adhesive; And / or, the third sensor unit is connected to the third analog-to-digital conversion unit via conductive glue.

[0015] Beneficial effects of the present invention: The present invention provides an efficient humidity, drinking water and water leakage monitoring environment monitoring system suitable for experimental animal breeding. The electrode pairs of the humidity, drinking water and water leakage monitoring modules are all arranged on the outer wall of the cage or drinking utensil, and are completely isolated from the interior of the breeding cavity, meeting the sterile environment requirements of SPF-level experimental animals and significantly reducing the risk of microbial contamination caused by contact with the monitored objects by traditional sensors. Each monitoring module receives radio frequency energy from the reader through the RFID antenna to achieve power supply, without the need for built-in batteries or external power supplies, avoiding battery leakage pollution problems, and simplifying wiring. It is particularly suitable for environments with strict restrictions on power supply and wiring in experimental animal barrier facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 This is a schematic diagram of the connection between the humidity monitoring module and the cage according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the connection between the humidity monitoring module and the cage according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the connection between the humidity monitoring module and the cage according to an embodiment of the present invention. Figure 3 ; Figure 4 is a schematic diagram of a humidity monitoring module according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection between the drinking water monitoring module and the drinking water bottle according to an embodiment of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the connection between the drinking water monitoring module and the drinking water bottle according to an embodiment of the present invention. Figure 2 ; Figure 7 is a schematic diagram of a drinking water monitoring module according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the connection between the water leakage monitoring module and the cage box according to an embodiment of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the connection between the water leakage monitoring module and the cage box according to an embodiment of the present invention. Figure 2 ; Figure 10 is a schematic diagram of a water leakage monitoring module according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the connection between the water leakage monitoring module and the cage box according to an embodiment of the present invention. Figure 3 ; Figure 12 Figure 11 Partial cross-sectional view along the AA direction; Figure 13 Figure 12 Enlarged view of point B in the middle; Figure 14 is a schematic diagram of communication between a humidity monitoring module and an RFID reader device according to an embodiment of the present invention; Figure 15 is a schematic diagram of communication between a drinking water monitoring module and an RFID reader / writer device according to an embodiment of the present invention; Figure 16 is a schematic diagram of communication between a water leakage monitoring module and an RFID reader device according to an embodiment of the present invention; In the picture: 1. Humidity monitoring module; 11. First sensor unit; 111. First electrode pair; 12. First analog-to-digital conversion unit; 13. First storage unit; 14. First communication unit; 141. First RFID chip; 142. First antenna; 15. First packaging unit; 2. Drinking water monitoring module; 21. Second sensor unit; 211. Second electrode pair; 22. Second analog-to-digital conversion unit; 23. Second storage unit; 24. Second communication unit; 241. Second RFID chip; 242. Second antenna; 25. Second packaging unit; 3. Water leakage monitoring module; 31. Third sensor unit; 311. Third electrode pair; 3111. Parallel segment of third electrode pair; 3112. Interdigital segment of third electrode pair; 32. Third analog-to-digital conversion unit; 33. Third storage unit; 34. Third communication unit; 341. Third RFID chip; 342. Third antenna; 35. Third packaging unit; 36. Ring card; 37. Ring buckle; 4. Cage box; 5. Water bottle. DETAILED DESCRIPTION

[0018] The present invention can be used for the breeding and rearing of experimental animals. By providing sensors (humidity sensors, liquid level sensors, and water leakage sensors) based on RFID technology, it enables automated monitoring of the experimental animal rearing environment. Most existing sensors lack passive or wireless operation, making them difficult to adapt to the specialized rearing environments of experimental animals (such as experimental animal barrier facilities). However, the sensors of the present invention are passive, wireless, contactless, and resistant to disinfection and sterilization, making them more suitable for the specialized rearing environments of experimental animals.

[0019] The present invention will be described in detail below with reference to the embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0020] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected", "connected", and "set" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] like Figures 1 to 16 As shown, the present invention provides an experimental animal breeding environment monitoring system based on RFID technology, comprising: A humidity monitoring module 1 is configured to convert the bedding material humidity into a first capacitance value and transmit the first capacitance value to an RFID reader device for analyzing the humidity value. The humidity monitoring module 1 includes a first sensor unit 11, which includes a first electrode pair 111. The first electrode pair 111 is disposed on both sides of the bedding material, so that the first capacitance value changes with the bedding material humidity. and / or, a water drinking monitoring module 2, configured to convert the water level in the water bottle into a second capacitance value and transmit the second capacitance value to an RFID reader / writer device to parse the water level value, wherein the water drinking monitoring module 2 includes a second sensor unit 21, the second sensor unit 21 includes a second electrode pair 211, and the second electrode pair 211 is disposed on an outer wall of the water bottle, so that the second capacitance value changes with the water level in the water bottle; And / or, a water leakage monitoring module 3 is used to convert the water leakage state of the water dispenser into a third capacitance value and transmit the third capacitance value to the RFID reader device to parse the water leakage state judgment value, wherein the water leakage monitoring module 3 includes a third sensor unit 31, the third sensor unit 31 includes a third electrode pair 311, and the third electrode pair 311 is arranged below the water outlet of the water dispenser, so that the third capacitance value changes with the water leakage state of the water dispenser.

[0022] In specific implementation, the first capacitance sensor unit, the second capacitance sensor unit and the third capacitance sensor unit in the present invention are all based on the same working principle: according to the capacitance calculation formula (Where, represents capacitance, represents the dielectric constant, represents the dielectric constant of vacuum, represents the area facing each other of the two electrodes, Indicates the distance between the two electrodes). During the use of the present invention, the distance between the two electrodes and the area facing the two electrodes are fixed. When the humidity of the litter, the amount of water in the water bottle, or the leakage of the water dispenser changes, the dielectric constant The capacitance value changes instantly, which in turn changes the capacitance value. Through calibration and plate design, the change in capacitance value can be converted into sensor readings, which can be used to monitor the state of the experimental animal breeding environment.

[0023] The humidity monitoring module provided by this invention monitors the wetness of the litter at the bottom of the cage and transmits the real-time monitoring data to the production management system passively, wirelessly, and contactlessly via an RFID tag chip. This allows the traditional schedule-based litter replacement method to be replaced based on actual litter usage (condition-based), saving significant manpower and material resources and reducing facility operating costs.

[0024] The drinking water monitoring module provided by the present invention can monitor drinking water consumption and provide early warning information by transmitting data to the production management system in real time, which will greatly help improve the efficiency of facility operation and management.

[0025] The water leakage monitoring module provided by the present invention can monitor and warn of water leakage in the cavity of the container used to raise experimental animals in real time, which can provide great help to the daily production and operation of animal facilities. The humidity monitoring module, drinking water detection module and water leakage monitoring module of the present invention can be used individually for experimental animal production and breeding. Combining them together can produce a technical effect of 1+1>2.

[0026] For example, when the leak monitoring module is combined with the drinking water monitoring module, the system can, after receiving a leak alarm signal (derived from the leak monitoring module's signal), continue to track the amount of water leakage (derived from the drinking water detection module installed on the drinking fountain) over time, providing strong data support for subsequent response and processing. Furthermore, combining the leak monitoring module with the drinking water monitoring module can also help determine whether a leak is a false alarm, for example, whether the leak alarm is caused by animal urine rather than a leaking drinking fountain.

[0027] For example, when the water leakage monitoring module is combined with the humidity monitoring module, the changes in the humidity of the bedding and the occurrence of water leakage can be monitored simultaneously. By comparing and analyzing the humidity changes and the water leakage status, it can be more accurately determined whether the increase in the humidity of the bedding is due to normal environmental humidity changes or water leakage, which helps to quickly locate the root cause of the problem.

[0028] Laboratory animal containment vessels are airtight chambers that require strict control of microbial levels. Therefore, traditional humidity and liquid level sensors (which require complex mechanical structures or electrical components) are ineffective in this scenario. Traditional liquid level sensors cannot withstand high-temperature and high-pressure sterilization, require power and signal cables, and come into direct contact with the monitored objects, increasing the risk of microbial contamination in the animal's environment.

[0029] The humidity monitoring module, drinking water detection module, and water leakage monitoring module in the present invention operate based on capacitance changes, thus eliminating the need for direct contact with the monitored object. For example, a liquid level sensor can be attached to the outer wall of a water bottle (without contaminating the drinking water), while the water leakage monitoring module / humidity monitoring module can be attached to the outer wall or bottom of a cage. The key advantage of this approach is that it does not affect the monitored object or contaminate the internal state of the monitored cavity.

[0030] The RFID reader / writer device can communicate with each monitoring module via ultra-high frequency (UHF) or high frequency (HF) communication protocols. The RFID reader / writer device has a built-in MCU module. After receiving the integrated coded data returned by each module, it can parse the humidity value, water volume value, or leak status judgment value (the leak status judgment value is when the third capacitance value exceeds the preset threshold, a signal is sent, logically judging it as a leak, such as a binary signal "1" indicating a leak, and "0" indicating normal). It can also be connected to the laboratory animal production management system via Ethernet or wireless transmission (such as Wi-Fi). The production management system can display real-time environmental data for each cage, set threshold alarms (such as humidity > 70%, water volume < 50ml, or leak status trigger), and generate historical data reports for optimizing the breeding process (such as automatically adjusting the bedding replacement schedule and the frequency of water bottle changes).

[0031] When deployed independently, a single cage can be equipped with only a humidity monitoring module, which is suitable for experimental animals that are sensitive to bedding moisture (such as rodents); or only a water leakage monitoring module can be installed for cage groups connected to automatic water supply systems.

[0032] When deployed in combination, the humidity and water leakage monitoring modules can be installed in the same cage at the same time. The system jointly analyzes the two types of data through a time synchronization window (such as 1 minute): if the water leakage status is "1" and the humidity mutation rate is greater than 5% / min, it can be determined that the drinking valve is leaking, causing the bedding to become wet, triggering an alarm and locating the cage; if the water leakage status is "0" but the humidity increases, it can be determined that it is caused by animal excretion, and only the humidity data is recorded without triggering an alarm.

[0033] When sharing a reader, the three monitoring modules of multiple cages can share the same RFID reader (e.g., a fixed reader mounted on the side of the cage frame). Data from different modules can be uniquely identified using EPC codes, reducing hardware costs. For example, the reader periodically polls each module (e.g., once per second), and the parsed data is stored in the production management system by cage number.

[0034] When high-temperature sterilization is required, the packaging unit of each module (such as the first packaging unit 15) can be made of materials such as epoxy resin, polyimide or nylon, which can withstand 121°C high-pressure steam sterilization to meet the disinfection requirements of experimental animal barrier facilities.

[0035] Traditional sensors (such as level floats and humidity probes) require intrusion into the enclosure, introducing the risk of microbial contamination. The electrode pairs of this invention are located on the outer wall of the cage or drinking vessel, completely isolated from the enclosure, meeting the sterile requirements of SPF (Specific Pathogen Free) laboratory animals.

[0036] This invention combines the RFID tag's energy harvesting function (powered by the reader's RF energy received by the antenna) with capacitive sensing, eliminating the need for an internal battery or external power supply for the monitoring module, thus avoiding battery leakage and wiring complexity. Furthermore, this invention integrates sensor data using EPC coding, achieving the integrated functionality of "single-code identification + data transmission." Compared to traditional multi-device independent communication solutions, this significantly simplifies the system architecture and improves anti-interference capabilities.

[0037] When humidity, water volume, and leak modules are used together, the system uses a joint algorithm to eliminate interference (for example, distinguishing between leaks and animal excretion) and achieve precise alarms. For example, a single increase in humidity could be caused by excretion or leaks, but combined with leak status signals, the true cause can be quickly identified. This multi-dimensional data fusion capability exceeds the limitations of traditional single-parameter monitoring.

[0038] In a specific embodiment of the present invention: The humidity monitoring module 1 also includes a first analog-to-digital conversion unit 12, a first storage unit 13, and a first communication unit 14. The first sensor unit 11 detects the humidity of the bedding through the first electrode pair 111 and converts it into a first capacitance value. The first analog-to-digital conversion unit 12 converts the first capacitance value into a first digital signal value. The first storage unit 13 receives the first digital signal value from the first analog-to-digital conversion unit 12 and records it. The first communication unit 14 receives the energy signal of the RFID reader device and converts it into the electrical energy required to drive the first sensor unit 11, the first analog-to-digital conversion unit 12, and the first storage unit 13. The first digital signal value is obtained from the first storage unit 13 and transmitted back to the RFID reader device via a carrier wave. The RFID reader device parses the humidity value according to the first digital signal value. And / or, the drinking water monitoring module 2 further includes a second analog-to-digital conversion unit 22, a second storage unit 23 and a second communication unit 24, the second sensor unit 21 detects the amount of water in the drinking bottle through the second electrode pair 211 and converts it into a second capacitance value, the second analog-to-digital conversion unit 22 converts the second capacitance value into a second digital signal, the second storage unit 23 receives the second digital signal from the second analog-to-digital conversion unit 22 and records it, the second communication unit 24 receives the energy signal of the RFID reader-writer device and converts it into the electrical energy required to drive the second sensor unit 21, the second analog-to-digital conversion unit 22 and the second storage unit 23 to work, and obtains the second digital signal value from the second storage unit 23 and transmits it back to the RFID reader-writer device via a carrier wave, and the RFID reader-writer device parses the water amount value according to the second digital signal value; And / or, the water leakage monitoring module 3 also includes a third analog-to-digital conversion unit 32, a third storage unit 33 and a third communication unit 34. The third sensor unit 31 detects the water leakage state of the water dispenser through the third electrode pair 311 and converts it into a third capacitance value. The third analog-to-digital conversion unit 32 converts the third capacitance value into a third digital signal. The third storage unit 33 receives the third digital signal from the third analog-to-digital conversion unit 32 and records it. The third communication unit 34 receives the energy signal of the RFID reader device to convert it into the electrical energy required to drive the third sensor unit 31, the third analog-to-digital conversion unit 32 and the third storage unit 33 to work, and obtains the third digital signal value from the third storage unit 33 and transmits it back to the RFID reader device through a carrier. The RFID reader device parses the water leakage state judgment value according to the third digital signal value.

[0039] In specific implementations, the first / second / third sensor units are used to feed back changes in bedding moisture, water level in the water bottle, and water leakage status in the cage into changes in capacitance values; the first / second / third analog-to-digital conversion units (ADCs) are used to convert changes in capacitance values into changes in digital signal values; the first / second / third storage units are used to obtain digital signal values from the first / second / third analog-to-digital conversion units and store and record them; the first / second / third communication units (RFID transponder units) are used to receive energy signals emitted by the RFID reader / writer device, convert them into electrical energy required to drive the capacitance sensor unit, analog-to-digital conversion unit, and storage unit, and obtain digital signals of capacitance changes from the storage unit and transmit them back to the RFID reader / writer device in the form of a carrier wave; the RFID reader / writer device provides energy to the first / second / third communication units, demodulates the received carrier wave signal, analyzes the capacitance change data, and converts them into humidity values / water level values / water leakage status judgment values.

[0040] The first / second / third sensor unit may include two symmetrical flexible electrodes (or two interlaced interdigital electrodes), which are respectively connected to the positive and negative poles of the first / second / third analog-to-digital conversion unit; the first / second / third sensor unit can sense the capacitance change in the picofarad level.

[0041] The first / second / third sensor unit does not need to be in direct contact with the monitored object. When it is within a certain distance from the monitored object (such as liquid level, water leakage, bedding with moisture changes, etc.), it can complete the status collection work. For example, when the humidity of the bedding in the cage box gradually increases, the dielectric constant between the two plates of the first sensor unit will also increase, and the capacitance value will also gradually increase within a time range. For another example, as the liquid level in the drinking bottle rises or falls, the dielectric constant between the two plates of the second electrode pair will increase or decrease, thereby changing its capacitance value. For another example, when the third sensor unit is attached to the outer surface of the cage box, there is a water leak inside the cage box, and the dielectric constant near the interdigitated capacitor plate will instantly rise from less than 10 to dozens. According to the formula , when other conditions remain unchanged, the dielectric constant The increase of will increase the capacitance value accordingly , which results in an instantaneous jump in the capacitance value of the capacitive sensor.

[0042] The first / second / third sensor unit is connected to the first / second / third analog-to-digital conversion unit; when the humidity / water level / leakage state between the first / second / third electrode pairs changes, the dielectric constant between the first / second / third electrode pairs will change, and further the instantaneous capacitance sensed by the first / second / third capacitance sensor unit will change; the first / second / third analog-to-digital converter converts the capacitance change (analog quantity) into a digital signal and stores it in the first / second / third storage unit; the first / second / third communication unit transmits the capacitance information in the first / second / third storage unit to the RFID reader device via a carrier wave.

[0043] The first / second / third storage unit may include an EEPROM, which obtains and records the digital signal value from the first / second / third analog-to-digital conversion unit via the I2C communication protocol. Signal transmission may be subject to various interferences, such as electromagnetic interference and signal attenuation. If the signal converted by the analog-to-digital conversion unit is directly output to the communication unit, if interference occurs during transmission, the data may be lost or erroneous, resulting in inaccurate weight data acquisition. The presence of the storage unit allows the digital signal value after analog-to-digital conversion to be recorded first. The communication unit can then read the data from the storage unit multiple times for transmission. Even if a transmission problem occurs, the data can be re-read and re-transmitted, ensuring data integrity and accuracy and improving system reliability.

[0044] In a specific embodiment of the present invention: The first communication unit 14 includes a first RFID chip 141 and a first antenna 142. The first antenna 142 receives the energy signal from the RFID reader device and converts it into electrical energy. The electrical energy is used to power the first sensor unit 11, the first analog-to-digital conversion unit 12, the first storage unit 13, and the first RFID chip 141. The first RFID chip 141 obtains a first digital signal value from the first storage unit 13 and integrates the first digital signal value with the EPC code of the first RFID chip 141 itself to obtain a first integrated EPC code. The first antenna 142 transmits the first integrated EPC code back to the RFID reader device via a carrier wave. The RFID reader device parses the first integrated EPC code to obtain a humidity value. And / or, the second communication unit 24 includes a second RFID chip 241 and a second antenna 242. The second antenna 242 receives the energy signal of the RFID reader-writer device and converts it into electrical energy, and uses this electrical energy to power the second sensor unit 21, the second analog-to-digital conversion unit 22, the second storage unit 23, and the second RFID chip 241. The second RFID chip 241 obtains a second digital signal value from the second storage unit 23, and integrates the second digital signal value with the EPC code of the second RFID chip 241 itself to obtain a second integrated EPC code. The second antenna 242 transmits the second integrated EPC code back to the RFID reader-writer device via a carrier wave, and the RFID reader-writer device parses the water output value according to the second integrated EPC code. And / or, the third communication unit 34 includes a third RFID chip 341 and a third antenna 342, the third antenna 342 receives the energy signal of the RFID reader device to convert it into electrical energy, and uses this electrical energy to power the third sensor unit 31, the third analog-to-digital conversion unit 32, the third storage unit 33 and the third RFID chip 341, the third RFID chip 341 obtains the third digital signal value from the third storage unit 33, and integrates the third digital signal value with the EPC code of the third RFID chip 341 itself to obtain a third integrated EPC code, the third antenna 342 transmits the third integrated EPC code back to the RFID reader device via a carrier, and the RFID reader device parses the water leakage status judgment value according to the third integrated EPC code.

[0045] In specific implementations, the analog-to-digital conversion unit, storage unit, RFID chip, and antenna in this invention can be separate, independent functional units or integrated into the same core. The entire humidity / drinking water / leakage monitoring module operates with a 3.3V supply from the communication unit (RFID tag), eliminating the need for batteries or power cords. Signal transmission can also be achieved through communication with an RFID reader / writer via the communication unit. If an ultra-high frequency RFID chip is used, wireless data collection and transmission can be achieved over distances of several meters or even tens of meters.

[0046] The storage unit is electrically connected to the RFID chip. After acquiring the digital signal value from the storage unit, the RFID chip integrates the corresponding weight value with its own EPC code. After algorithmic integration, the antenna transmits the integrated EPC code back to the RFID reader via a carrier wave, enabling wireless data transmission and identification, facilitating reader recognition and processing. More specifically, the present invention can integrate only a portion of the EPC (Electronic Product Code) code. This ensures data accuracy, efficiency, and security while also ensuring the compliance and compatibility of the EPC code, ensuring stable and reliable operation of the entire system.

[0047] In a specific embodiment of the present invention: The padding is laid on the inner side of the bottom of the cage box 4 , and the humidity monitoring module 1 is arranged on the outer side of the bottom of the cage box 4 , wherein the two electrode plates of the first electrode pair 111 are symmetrically arranged on the left and right sides of the bottom of the cage box 4 .

[0048] During specific implementation, the bedding is laid on the inner side of the bottom of the cage to absorb the excrement of experimental animals and maintain a dry environment. The humidity monitoring module is arranged on the outer side of the bottom of the cage to avoid contamination caused by direct contact with the bedding. The two plates of the first electrode pair can be flexible electrodes (such as FPC printed copper foil plates), symmetrically pasted on the left and right outer walls of the bottom of the cage, and the shape of the plate can be a long strip (for example, the length is consistent with the width of the bottom of the cage, and the width is 10mm). When the humidity of the bedding changes, the dielectric constant of the medium between the plates changes due to the penetration of moisture into the bottom of the cage, resulting in a change in the first capacitance value. The first sensor unit can be connected to the first analog-to-digital conversion unit through conductive glue, and the capacitance signal is converted into a digital value and stored in the first storage unit, and is transmitted back to the RFID reader device by the first communication unit through the antenna.

[0049] Traditional humidity probes need to be inserted into the bedding, which may carry microorganisms to contaminate the internal environment of the cage and do not meet the SPF-level animal breeding requirements. The present invention uses symmetrical electrode pairs on the outer wall of the cage to monitor the humidity of the bedding in a non-contact manner, completely isolating it from the breeding cavity to avoid cross-contamination. This is a core problem that has not been solved by the existing technology. The existing cage design does not take into account sensor integration, and the monitoring equipment needs to be installed later, which makes installation inconvenient and affects the stacking and storage of the cages. In further design, the electrode pair of the present invention can be embedded in the special installation groove on the outside of the bottom of the cage to form an integrated structure with the cage, which does not affect the standardized production of the cage and ensures the reliability of monitoring.

[0050] Existing solutions often rely on single-point monitoring (such as at the center of the cage), which fails to reflect the overall moisture distribution of the bedding. This new approach uses symmetrically arranged elongated electrode pairs and the spatial integration effect of the capacitive field to obtain the average lateral moisture value of the bedding, significantly reducing errors compared to single-point monitoring.

[0051] In a specific embodiment of the present invention: The drinking water monitoring module 2 is arranged outside the drinking water bottle 5 , wherein the two electrode plates of the second electrode pair 211 are connected in parallel to the outside of the side wall of the drinking water bottle 5 .

[0052] During specific implementation, a groove for fixing the water drinking monitoring module can be provided on the outside of the water bottle body. The second electrode pair can be arranged in parallel on the equal-diameter portion of the bottle body, avoiding the bottleneck area, to ensure that the water volume monitoring covers the effective volume (such as the 50-250ml range of a 250ml bottle). When the water volume is lower than 50ml, the system triggers an alarm, prompting the replacement of the water bottle. Non-automatic drinking water systems rely on manual observation of the water level in the water bottle, which can easily lead to dehydration of animals due to negligence. The present invention uses parallel electrode pairs to monitor the water volume in real time, combined with RFID wireless transmission, to achieve remote monitoring of the drinking status (such as pushing warning information through a mobile phone APP), reducing the frequency of manual inspections and greatly improving management efficiency.

[0053] In a specific embodiment of the present invention: The water leakage monitoring module 3 is arranged on the cage box bracket. When the cage box 4 is inserted into the cage box bracket, the cage box 4 is attached to the water leakage monitoring module.

[0054] In practice, the water leakage monitoring module operates based on changes in capacitance. When a leak occurs, water flows along the front wall of the cage to the bottom wall, changing the dielectric environment around the electrode pair and causing a dramatic change in capacitance. The third sensor unit detects this capacitance change and converts it into an electrical signal, which is then converted into a digital signal by the analog-to-digital conversion unit. This digital signal is recorded by the storage unit and transmitted to the RFID reader via the communication unit. The RFID reader interprets the received digital signal to determine the leak status, enabling real-time monitoring and alarming of leaks.

[0055] The humidity monitoring module, the drinking water monitoring module and the water leakage monitoring module do not need to come into direct contact with the monitored object to cause contamination. The humidity monitoring module and the water leakage monitoring module can be attached to the outer wall of the cage, and the drinking water monitoring module can be attached to the outer wall of the water bottle.

[0056] During specific implementation, the first electrode pair, the second electrode pair, and the third electrode pair can be manufactured in different styles to achieve different functions and be applied to different scenarios or specific devices.

[0057] For example, the first electrode pair is made into two symmetrical long bipolar plates and arranged oppositely on two sides of the bottom of the cage box, which can be used as a humidity sensor to monitor the moisture condition of the cage box bedding.

[0058] The second electrode pair is made into a long strip bipolar plate and installed on the side wall of the water bottle. It can be used as a liquid level sensor to monitor changes in water volume.

[0059] The third plate is made into an interdigital capacitor, which can be used as a water leakage sensor to monitor whether there is water leakage in the cage. The interdigital capacitor is extremely sensitive to the instantaneous change in dielectric constant caused by water leakage.

[0060] In a specific embodiment of the present invention: The third electrode pair 311 includes a third electrode pair parallel section 3111 and a third electrode pair interdigital section 3112. The third electrode pair parallel section 3111 extends from the outer side of the front wall of the cage box 4 to the outer side of the bottom wall of the cage box 4. The third electrode pair interdigital section 3112 is located outside the bottom wall of the cage box 4.

[0061] In a specific implementation, the parallel segment of the third electrode pair can be a long strip of electrode plate, extending vertically from the outside of the front wall of the cage to the outside of the bottom wall, used to monitor the flow of water along the front wall; the interdigitated segment of the third electrode pair can be an interdigitated electrode plate, located outside the bottom wall, used to monitor the convergence of water at the bottom wall. When the water dispenser leaks, the water first contacts the parallel segment electrode along the front wall, causing the capacitance of the parallel segment to increase as the water flow rises. Because the capacitance of the interdigitated segment is more sensitive, when the water flows along to the bottom wall and covers the interdigitated segment of the third electrode pair, the capacitance value measured by the third sensor unit drops in a step-like jump. By analyzing the timing and amplitude of the capacitance changes of the parallel and interdigitated segments, different stages of the leak can be distinguished: only the parallel segment triggers a slight drip, while both the parallel and interdigitated segments trigger a severe leak.

[0062] In specific implementation, the humidity monitoring module, drinking water monitoring module and water leakage monitoring module can be encapsulated and pasted on the outer surface of the monitored device in the form of adhesive tape, or they can be mechanically connected and embedded on the surface of the device close to the monitored area. They can also be integrated with the device and encapsulated in the corresponding position of the device shell during injection molding.

[0063] In a specific embodiment of the present invention: The water leakage monitoring module is arranged on the outside of the cage box. The water leakage monitoring module 3 also includes a third packaging unit 35, a ring card 36 and a ring buckle 37. The third sensor unit 31, the third analog-to-digital conversion unit 32, the third storage unit 33 and the third communication unit 34 are encapsulated in the third packaging unit 35. The ring card 36 is connected to the third packaging unit 35, and the ring buckle 37 is connected to the front wall of the cage box 4. The third packaging unit 35 is connected to the outside of the front wall of the cage box 4 through the buckle relationship between the ring card 36 and the ring buckle 37.

[0064] In specific implementation, there are many ways to connect the ring buckle to the front wall of the cage box. For example, the ring buckle is injection-molded in the front wall of the cage box as an insert and pre-embedded in the outside of the front wall. Another example is that the ring buckle is bonded to the front wall of the cage box. Another example is that a circular through hole is opened in the front wall of the cage box. The ring buckle is designed as a "T-shaped" through structure, including an inner fixing plate and an outer connecting buckle. The ring buckle passes through the through hole from the inside of the cage box, and the inner fixing plate fits with the inner side of the front wall. The edge of the through hole can be sealed with sealant to prevent steam from penetrating into the interior of the cage box during sterilization. The ring card is connected to the outer connecting buckle.

[0065] The first, second, and third packaging units can be manufactured from high-temperature, corrosion-resistant materials such as PSU, PPSU, epoxy resin, polyimide, or nylon. PSU (polysulfone) and PPSU (polyphenylene sulfone resin) do not contain components such as phenolic resin and do not release harmful substances during high-temperature sterilization. Epoxy resin forms a three-dimensional network structure after curing, providing excellent mechanical strength, electrical insulation, and chemical stability. This structure firmly protects internal components and prevents external factors from interfering with the sensor's normal operation. Polyimide is heat-resistant and has excellent mechanical properties, allowing it to withstand the harsh conditions of high-temperature environments, ensuring unimpaired sensor performance. Nylon's high mechanical strength, excellent wear resistance, and strong chemical stability enhance sensor durability. These material properties are closely integrated with sensor performance optimization to improve overall sensor performance.

[0066] In a specific embodiment of the present invention: The first electrode pair 111 is a flexible electrode pair; And / or, the second electrode pair 211 is a flexible electrode pair; And / or, the third electrode pair 311 is a flexible electrode pair.

[0067] In specific implementation, the first electrode pair can be in the form of FPC printed parallel electrode plates to monitor the dryness of the padding; the second electrode pair can be in the form of FPC printed parallel electrodes to monitor the water consumption of the water bottle; the third electrode pair can be in the form of FPC printed interdigital capacitors to solve the problem of water leakage monitoring in the container cavity.

[0068] Flexible electrode pairs can be made from a variety of materials, including flexible polymers such as polyimide (PI) or polyethylene terephthalate (PET) as the base material, while the conductive portion can be made of materials such as silver nanowires, copper foil, or conductive ink. These materials not only ensure the flexibility of the electrode pair, but also provide good conductivity and corrosion resistance, enabling long-term stable operation in high-temperature and high-pressure sterilization environments.

[0069] The humidity monitoring module's first electrode pair features a flexible design, allowing it to conform tightly to the curved surface of the cage's bottom, ensuring uniform sensing of changes in bedding moisture. The water monitoring module's second electrode pair also features a flexible design, adapting to the outer shape of the water bottle, ensuring stable capacitance detection. The leak monitoring module's third electrode pair utilizes a flexible material that conforms to the outside of the cage's front and bottom walls, effectively capturing changes in the dielectric constant along the leak path.

[0070] Taking the humidity monitoring module as an example, a flexible electrode pair is mounted on the outside of the cage bottom, with its two electrodes symmetrically arranged on either side. The electrodes are connected to the analog-to-digital conversion unit via conductive adhesive. This adhesive not only provides a good electrical connection but also possesses a degree of flexibility to adapt to the possible bending and deformation of the cage bottom, ensuring a reliable connection. During installation, the flexible electrodes can bend slightly to conform to the shape of the cage bottom, ensuring a tight fit. This conformability increases the electrode pair's sensitivity to changes in bedding moisture. Because the distance between the electrodes and the bedding is more uniform, changes in the dielectric constant more accurately reflect the actual moisture level of the bedding.

[0071] In a specific embodiment of the present invention: The first sensor unit 11 is connected to the first analog-to-digital conversion unit 12 via conductive glue; and / or, the second sensor unit 21 is connected to the second analog-to-digital conversion unit 22 via a conductive adhesive; And / or, the third sensor unit 31 is connected to the third analog-to-digital conversion unit 32 via conductive adhesive.

[0072] In specific implementations, the conductive adhesive ensures both electrical connection and mechanical fixation between the electrode pair and the analog-to-digital conversion unit. It also possesses a degree of flexibility, adapting to even minor movements between the electrode pair and the analog-to-digital conversion unit, ensuring a reliable connection. The sensor unit can be positioned opposite the antenna, with the sensor on one side of the chip (which may include an RFID chip, storage unit, and analog-to-digital conversion unit) and the antenna on the other. This layout optimizes space utilization, reduces interference between the antenna and sensor, and improves signal transmission stability and accuracy.

[0073] Since the RFID reader device includes an MCU module, it can execute corresponding algorithm calculations. Specifically, in the real-time implementation of the present invention, a specific algorithm can be combined to correct the collected values to obtain more accurate monitoring results.

[0074] In a specific embodiment of the present invention: The RFID reader device parses the humidity value based on the following steps: S11. Get the initial dry pad capacitance value sequence , to calculate the baseline mean initial dry pad capacitance value and standard deviation , define the normal humidity fluctuation threshold as ,in is the adaptive coefficient; S12. Real-time acquisition of pad capacitance value sequence Perform a sliding window (window length ) mean filtering, we get ; S13. Calculation of dynamic volatility coefficient ,like ( is the sudden fluctuation threshold, ), it is determined to be animal activity interference, triggering the following correction to obtain the corrected bedding capacitance value:

[0075] in is the smoothing factor ( ), determined by training with historical interference data; S14. The corrected pad capacitance value Substitute into the humidity conversion function , output real-time humidity value, where 、 、 are the fitting parameters obtained through the litter humidity-capacitance calibration experiment.

[0076] When implementing it specifically, It can be adjusted according to the actual operating environment, such as , If the value is too large, it may include abnormal humidity fluctuations caused by animal excretion, and it may be impossible to effectively distinguish normal noise from actual humidity changes; If it is too small, normal fluctuations may be easily misjudged as interference, resulting in decreased monitoring sensitivity.

[0077] In traditional humidity monitoring, it is difficult to effectively suppress the impact of interference factors such as animal activities on humidity monitoring. However, the present invention can accurately identify and correct the interference of animal activities by introducing methods such as dynamic fluctuation coefficient, sudden fluctuation threshold and correction formula, thereby greatly improving the accuracy of humidity monitoring and providing a new solution for humidity monitoring in experimental animal breeding environments.

[0078] In a specific embodiment of the present invention: The experimental animal breeding environment monitoring system includes two or three modules of a humidity monitoring module, a drinking water monitoring module, and a water leakage monitoring module. The two or three modules use the same RFID reader / writer device, and the same RFID reader / writer device analyzes the humidity value, water value, or water leakage status judgment value based on the following steps: S21. Establish time synchronization window for humidity, water volume, and water leakage signals , for data in the same window Perform spatiotemporal alignment, where The humidity value output by the humidity monitoring module; The water volume value output by the drinking water monitoring module (corresponding to the remaining water volume in the drinking bottle, unit: ml); The leakage status output by the leakage monitoring module (such as Indicates water leakage. Indicates a non-leakage state, which can be determined based on a sudden change in the dielectric constant of the capacitor); S22. Perform a combined water leakage and humidity assessment. If and ( Indicates the humidity mutation rate threshold, unit: % / min), it is judged as "water source leakage" (such as water leakage from the drinking valve seeping into the bedding), otherwise it is marked as "animal excretion interference", and the humidity value is corrected: ,in 、 is the experimental calibration factor (e.g. , ); And / or, conduct a joint judgment of water leakage and water volume. If and ( The upper limit of the normal drinking rate of experimental animals, unit: ml / min; Indicates an abnormal increase in water consumption rate), it is judged as "water bottle rupture leakage", and the leakage status correction can be triggered:

[0079] It can be used to eliminate the misjudgment of water leakage caused by the excretion of experimental animals.

[0080] Although there have been attempts to monitor parameters such as humidity, water volume, and leakage in the prior art, the lack of effective data fusion and joint judgment methods often makes it difficult to accurately distinguish parameter changes caused by different reasons, resulting in frequent false alarms and missed alarms. The present invention successfully solves this technical problem by establishing a time synchronization window and a joint judgment mechanism, enabling accurate judgment of the state of the experimental animal breeding environment and eliminating false alarms. This innovative algorithm design and data processing method enables the monitoring system to more accurately reflect the actual environmental conditions, providing a more reliable decision-making basis for breeding management.

[0081] In summary, the present invention can be applied to experimental animal breeding to solve the technical problem of low efficiency in monitoring the experimental animal breeding environment.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An experimental animal breeding environment monitoring system based on RFID technology, characterized in that: include: A humidity monitoring module (1) is used for converting the humidity of a padding material into a first capacitance value and transmitting the first capacitance value to an RFID reader / writer device to parse out the humidity value, wherein the humidity monitoring module (1) comprises a first sensor unit (11), the first sensor unit (11) comprises a first electrode pair (111), and the first electrode pair (111) is arranged on both sides of the padding material, so that the first capacitance value changes with the humidity of the padding material; And / or, a drinking water monitoring module (2), configured to convert the amount of water in the drinking water bottle into a second capacitance value and transmit the second capacitance value to an RFID reader / writer device to parse the water amount value, wherein the drinking water monitoring module (2) comprises a second sensor unit (21), the second sensor unit (21) comprises a second electrode pair (211), and the second electrode pair (211) is arranged on the outer wall of the drinking water bottle, so that the second capacitance value changes with the amount of water in the drinking water bottle; And / or, a water leakage monitoring module (3) for converting the water leakage state of the water dispenser into a third capacitance value and transmitting the third capacitance value to an RFID reader / writer device to parse out a water leakage state judgment value, wherein the water leakage monitoring module (3) includes a third sensor unit (31), the third sensor unit (31) includes a third electrode pair (311), and the third electrode pair (311) is arranged below the water outlet of the water dispenser, so that the third capacitance value changes with the water leakage state of the water dispenser.

2. The experimental animal breeding environment monitoring system based on RFID technology according to claim 1, characterized in that: The humidity monitoring module (1) further comprises a first analog-to-digital conversion unit (12), a first storage unit (13) and a first communication unit (14); the first sensor unit (11) detects the humidity of the padding material through the first electrode pair (111) and converts the detected humidity into a first capacitance value; the first analog-to-digital conversion unit (12) converts the first capacitance value into a first digital signal value; the first storage unit (13) receives the first digital signal value from the first analog-to-digital conversion unit (12) and records the received signal; the first communication unit (14) receives an energy signal from an RFID reader / writer device and converts the received signal into the electrical energy required to drive the first sensor unit (11), the first analog-to-digital conversion unit (12) and the first storage unit (13); and obtains the first digital signal value from the first storage unit (13) and transmits the received signal back to the RFID reader / writer device via a carrier wave; the RFID reader / writer device parses the humidity value according to the first digital signal value; And / or, the drinking water monitoring module (2) further includes a second analog-to-digital conversion unit (22), a second storage unit (23) and a second communication unit (24); the second sensor unit (21) detects the amount of water in the drinking bottle through the second electrode pair (211) and converts it into a second capacitance value; the second analog-to-digital conversion unit (22) converts the second capacitance value into a second digital signal; the second storage unit (23) receives the second digital signal from the second analog-to-digital conversion unit (22) and records it; the second communication unit (24) receives the energy signal of the RFID reader / writer device and converts it into the electric energy required to drive the second sensor unit (21), the second analog-to-digital conversion unit (22) and the second storage unit (23) to work; and obtains the second digital signal value from the second storage unit (23) and transmits it back to the RFID reader / writer device via a carrier wave; the RFID reader / writer device parses the water amount value according to the second digital signal value; And / or, the water leakage monitoring module (3) further includes a third analog-to-digital conversion unit (32), a third storage unit (33) and a third communication unit (34); the third sensor unit (31) detects the water leakage state of the water dispenser through the third electrode pair (311) and converts it into a third capacitance value; the third analog-to-digital conversion unit (32) converts the third capacitance value into a third digital signal; the third storage unit (33) receives the third digital signal from the third analog-to-digital conversion unit (32) and records it; the third communication unit (34) receives the energy signal of the RFID reader / writer device and converts it into the electric energy required to drive the third sensor unit (31), the third analog-to-digital conversion unit (32) and the third storage unit (33) to work; and obtains the third digital signal value from the third storage unit (33) and transmits it back to the RFID reader / writer device through a carrier wave; the RFID reader / writer device parses the water leakage state judgment value according to the third digital signal value.

3. The experimental animal breeding environment monitoring system based on RFID technology according to claim 2, characterized in that: The first communication unit (14) includes a first RFID chip (141) and a first antenna (142). The first antenna (142) receives an energy signal from the RFID reader / writer device and converts it into electrical energy, and uses the electrical energy to power the first sensor unit (11), the first analog-to-digital conversion unit (12), the first storage unit (13), and the first RFID chip (141). The first RFID chip (141) obtains a first digital signal value from the first storage unit (13), and integrates the first digital signal value with the EPC code of the first RFID chip (141) itself to obtain a first integrated EPC code. The first antenna (142) transmits the first integrated EPC code back to the RFID reader / writer device via a carrier wave, and the RFID reader / writer device parses the humidity value according to the first integrated EPC code. And / or, the second communication unit (24) includes a second RFID chip (241) and a second antenna (242), the second antenna (242) receives an energy signal from the RFID reader / writer device to convert it into electrical energy, and uses the electrical energy to power the second sensor unit (21), the second analog-to-digital conversion unit (22), the second storage unit (23), and the second RFID chip (241), the second RFID chip (241) obtains a second digital signal value from the second storage unit (23), and integrates the second digital signal value with the EPC code of the second RFID chip (241) itself to obtain a second integrated EPC code, the second antenna (242) transmits the second integrated EPC code back to the RFID reader / writer device via a carrier wave, and the RFID reader / writer device parses the water output value according to the second integrated EPC code; And / or, the third communication unit (34) includes a third RFID chip (341) and a third antenna (342), the third antenna (342) receives the energy signal of the RFID reader device to convert it into electrical energy, and uses the electrical energy to power the third sensor unit (31), the third analog-to-digital conversion unit (32), the third storage unit (33) and the third RFID chip (341), the third RFID chip (341) obtains a third digital signal value from the third storage unit (33), and integrates the third digital signal value with the EPC code of the third RFID chip (341) itself to obtain a third integrated EPC code, the third antenna (342) transmits the third integrated EPC code back to the RFID reader device via a carrier, and the RFID reader device parses the third integrated EPC code to obtain a water leakage status judgment value.

4. The experimental animal breeding environment monitoring system based on RFID technology according to claim 3, characterized in that: The padding is laid on the inner side of the bottom of the cage box (4), and the humidity monitoring module (1) is arranged on the outer side of the bottom of the cage box (4), wherein the two electrode plates of the first electrode pair (111) are symmetrically arranged on the left and right sides of the bottom of the cage box (4).

5. The experimental animal breeding environment monitoring system based on RFID technology according to claim 3, characterized in that: The drinking water monitoring module (2) is arranged outside the drinking water bottle (5), wherein the two electrode plates of the second electrode pair (211) are connected in parallel to the outside of the side wall of the drinking water bottle (5).

6. The experimental animal breeding environment monitoring system based on RFID technology according to claim 3, characterized in that: The water leakage monitoring module (3) is arranged on the cage box bracket, and when the cage box (4) is inserted into the cage box bracket, the cage box (4) fits on the water leakage monitoring module (3).

7. The experimental animal breeding environment monitoring system based on RFID technology according to claim 3, characterized in that: The third electrode pair (311) comprises a third electrode pair parallel section (3111) and a third electrode pair interdigital section (3112), wherein the third electrode pair parallel section (3111) extends from the outside of the front wall of the cage box (4) to the outside of the bottom wall of the cage box (4), and the third electrode pair interdigital section (3112) is located outside the bottom wall of the cage box (4).

8. The experimental animal breeding environment monitoring system based on RFID technology according to claim 3, characterized in that: The water leakage monitoring module (3) is arranged outside the cage box (4), and the water leakage monitoring module (3) further comprises a third packaging unit (35), a ring card (36) and a ring buckle (37); the third sensor unit (31), the third analog-to-digital conversion unit (32), the third storage unit (33) and the third communication unit (34) are packaged in the third packaging unit (35); the ring card (36) is connected to the third packaging unit (35); the ring buckle (37) is connected to the front wall of the cage box (4); and the third packaging unit (35) is connected to the outside of the front wall of the cage box (4) through the buckling relationship between the ring card (36) and the ring buckle (37).

9. The experimental animal breeding environment monitoring system based on RFID technology according to any one of claims 1 to 8, characterized in that: The first electrode pair (111) is a flexible electrode pair; And / or, the second electrode pair (211) is a flexible electrode pair; And / or, the third electrode pair (311) is a flexible electrode pair.

10. The experimental animal breeding environment monitoring system based on RFID technology according to any one of claims 2 to 8, characterized in that: The first sensor unit (11) is connected to the first analog-to-digital conversion unit (12) via conductive glue; And / or, the second sensor unit (21) is connected to the second analog-to-digital conversion unit (22) via conductive glue; And / or, the third sensor unit (31) is connected to the third analog-to-digital conversion unit (32) via conductive glue.

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