An experimental animal feeding environment monitoring system based on RFID technology

Abstract

The application discloses an experimental animal feeding environment monitoring system based on RFID technology and relates to the technical field of life science research, comprising: a humidity monitoring module, which is used for converting bedding humidity into a first capacitance value and transmitting the first capacitance value to an RFID reader-writer device to analyze the humidity value; and / or a drinking water monitoring module, which is used for converting the water volume of a drinking water bottle into a second capacitance value and transmitting the second capacitance value to the RFID reader-writer device to analyze the water volume value; and / or a water leakage monitoring module, which is used for converting the water leakage state of a drinking water device into a third capacitance value and transmitting the third capacitance value to the RFID reader-writer device to analyze the water leakage state judgment value. The application can solve the technical problem of low monitoring efficiency of the experimental animal feeding environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of life science research, and particularly relates to an experimental animal feeding environment monitoring system based on RFID technology. BACKGROUND

[0002] With the development of life science technology and the increasing attention of people on life health, the market demand for experimental animals is increasing. Efficient operation of experimental animal feeding facilities depends on accurate monitoring of the feeding environment. Water is an essential element for animal survival. In experimental animal feeding, water affects the environmental humidity and water supply required for experimental animals to survive, and excessive water can cause discomfort or even danger to experimental animals. For experimental animal feeding environment monitoring related to water, the prior art still has the following deficiencies:

[0003] The replacement of bedding in animal containers is the most laborious task in the daily work of experimental animal facilities. According to conventional experience, the bedding in the containers needs to be replaced every 7 days to ensure the dryness of the bedding and improve animal welfare and quality. However, in many cases, the 7-day-old bedding is still dry, especially when there are not many animals in a cage. However, the prior art lacks effective monitoring means for the humidity of the bedding.

[0004] For feeding methods without automatic water supply systems, a 250-300ml water bottle is often provided for the animal containers, and the staff will replace the water bottle or add drinking water every 3 days on average. However, in actual operation, the water bottle is often replaced before it is empty, or the water is replaced when there are only a small amount of animals. Lack of water can cause animal welfare problems and affect animal growth quality; replacing the water before it is consumed is a waste, especially since the drinking water for experimental animals needs to be sterilized at high temperature and high pressure, and water replacement is the most energy-consuming task in animal facilities. However, the prior art lacks effective monitoring means for the water quantity of the water bottle.

[0005] For large-scale experimental animal production facilities, the animal feeding containers are connected to an automatic animal drinking water supply system, and the water valve introduces sterilized water into the container cavity. However, due to environmental, animal activity, technical limitations and other problems, there is a certain percentage of water leakage from the water valve. If these leaks are not discovered and addressed in a timely manner, it can cause the animals in the containers to be drowned, resulting in economic losses, and if the core population of animals experiences such problems, it can also affect animal production work for a considerable period of time, requiring the re-cultivation of the basic animal population. However, the prior art lacks effective monitoring means for water leakage in animal containers. SUMMARY

[0006] In order to solve one or more technical problems in the prior art, the present application provides an experimental animal feeding environment monitoring system based on RFID technology, comprising:

[0007] a humidity monitoring module for converting the bedding humidity into a first capacitance value and transmitting the first capacitance value to the RFID reader-writer device to resolve the humidity value, wherein the humidity monitoring module comprises a first sensor unit, the first sensor unit comprising a first electrode pair arranged on both sides of the bedding, so that the first capacitance value changes with the bedding humidity;

[0008] and / or a drinking water monitoring module for converting the drinking water bottle water volume into a second capacitance value and transmitting the second capacitance value to the RFID reader-writer device to resolve the water volume value, wherein the drinking water monitoring module comprises a second sensor unit, the second sensor unit comprising a second electrode pair arranged on the outer wall of the drinking water bottle, so that the second capacitance value changes with the drinking water bottle water volume;

[0009] and / or a water leakage monitoring module for converting the drinking water appliance water leakage state into a third capacitance value and transmitting the third capacitance value to the RFID reader-writer device to resolve the water leakage state judgment value, wherein the water leakage monitoring module comprises a third sensor unit, the third sensor unit comprising a third electrode pair arranged below the water outlet of the drinking water appliance, so that the third capacitance value changes with the drinking water appliance water leakage state.

[0010] Preferably:

[0011] The humidity monitoring module further comprises a first analog-digital conversion unit, a first storage unit and a first communication unit, the first sensor unit detects the bedding humidity through the first electrode pair and converts it into a first capacitance value, the first analog-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-digital conversion unit and records, the first communication unit receives the energy signal of the RFID reader-writer device to convert into the electric energy required for driving the first sensor unit, the first analog-digital conversion unit and the first storage unit to work, and obtains the first digital signal value from the first storage unit through the carrier back to the RFID reader-writer device, and the RFID reader-writer device resolves the humidity value according to the first digital signal value;

[0012] And / or, the drinking water monitoring module further comprises a second analog-digital conversion unit, a second storage unit and a second communication unit, the second sensor unit detects the water volume of the drinking water bottle through the second electrode pair and converts it into a second capacitance value, the second analog-digital conversion unit converts the second capacitance value into a second digital signal, the second storage unit receives the second digital signal from the second analog-digital conversion unit and records, the second communication unit receives the energy signal of the RFID reader-writer device to convert into the electric energy required for the operation of the second sensor unit, the second analog-digital conversion unit and the second storage unit, and obtains the second digital signal value from the second storage unit and returns to the RFID reader-writer device through the carrier wave, and the RFID reader-writer device analyzes the water volume value according to the second digital signal value;

[0013] And / or, the water leakage monitoring module further comprises a third analog-digital conversion unit, a third storage unit and a third communication unit, the third sensor unit detects the water leakage state of the drinking water device through the third electrode pair and converts it into a third capacitance value, the third analog-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-digital conversion unit and records, the third communication unit receives the energy signal of the RFID reader-writer device to convert into the electric energy required for the operation of the third sensor unit, the third analog-digital conversion unit and the third storage unit, and obtains the third digital signal value from the third storage unit and returns to the RFID reader-writer device through the carrier wave, and the RFID reader-writer device analyzes the water leakage state judgment value according to the third digital signal value.

[0014] Preferably:

[0015] The first communication unit comprises a first RFID chip and a first antenna, the first antenna receives the energy signal of the RFID reader-writer device to convert into electric energy, and uses the electric energy to power the first sensor unit, the first analog-digital conversion unit, the first storage unit and the first RFID chip, the first RFID chip obtains the first digital signal value from the first storage unit, and integrates the first digital signal value with the EPC code of the first RFID chip itself to obtain a first integrated EPC code, the first antenna returns the first integrated EPC code to the RFID reader-writer device through the carrier wave, and the RFID reader-writer device analyzes the humidity value according to the first integrated EPC code;

[0016] And / or, the second communication unit comprises a second RFID chip and a second antenna, the second antenna receives an energy signal of an RFID reader-writer device to be converted into electric energy, and the second antenna powers the second sensor unit, the second analog-digital conversion unit, the second storage unit and the second RFID chip with the electric energy, the second RFID chip obtains a second digital signal value from the second storage unit, and integrates the second digital signal value with an EPC code of the second RFID chip itself to obtain a second integrated EPC code, the second antenna returns the second integrated EPC code to the RFID reader-writer device through a carrier wave, and the RFID reader-writer device analyzes the water quantity value according to the second integrated EPC code;

[0017] And / or, the third communication unit comprises a third RFID chip and a third antenna, the third antenna receives an energy signal of an RFID reader-writer device to be converted into electric energy, and the third antenna powers the third sensor unit, the third analog-digital conversion unit, the third storage unit and the third RFID chip with the electric energy, the third RFID chip obtains a third digital signal value from the third storage unit, and integrates the third digital signal value with an EPC code of the third RFID chip itself to obtain a third integrated EPC code, the third antenna returns the third integrated EPC code to the RFID reader-writer device through a carrier wave, and the RFID reader-writer device analyzes the water leakage state judgment value according to the third integrated EPC code.

[0018] Preferably:

[0019] The pad is laid in the inside of the bottom of the cage box, and the humidity monitoring module is arranged outside the bottom of the cage box, wherein the two plates of the first electrode pair are symmetrically arranged on the left and right sides of the bottom of the cage box.

[0020] Preferably:

[0021] The drinking water monitoring module is arranged outside the drinking water bottle, wherein the two plates of the second electrode pair are connected in parallel outside the side wall of the drinking water bottle.

[0022] Preferably, the water leakage monitoring module is arranged on the cage box support, and when the cage box is inserted into the cage box support, the cage box is attached to the water leakage monitoring module.

[0023] Preferably, the third electrode pair comprises a third electrode pair parallel segment and a third electrode pair interdigital segment, the third electrode pair parallel segment extends from the outside of the front wall of the cage box to the outside of the bottom wall of the cage box, and the third electrode pair interdigital segment is located outside the bottom wall of the cage box.

[0024] Preferably:

[0025] The water leakage monitoring module is arranged outside the cage box, the water leakage monitoring module further comprises a third packaging unit, a ring-shaped card and a ring-shaped buckle, the third sensor unit, the third analog-digital conversion unit, the third storage unit and the third communication unit are packaged in the third packaging unit, the ring-shaped card is connected with the third packaging unit, the ring-shaped buckle is connected with the front wall of the cage box, and the third packaging unit is connected outside the front wall of the cage box through the clamping relationship between the ring-shaped card and the ring-shaped buckle.

[0026] Preferably,

[0027] The first electrode pair is a flexible electrode pair;

[0028] And / or, the second electrode pair is a flexible electrode pair;

[0029] And / or, the third electrode pair is a flexible electrode pair.

[0030] Preferably,

[0031] The first sensor unit is connected with the first analog-digital conversion unit through conductive glue;

[0032] And / or, the second sensor unit is connected with the second analog-digital conversion unit through conductive glue;

[0033] And / or, the third sensor unit is connected with the third analog-digital conversion unit through conductive glue.

[0034] The beneficial effects of the present application are:

[0035] The present application provides a high-efficiency humidity, drinking water and water leakage monitoring environment monitoring system suitable for experimental animal feeding. The electrode pairs of the humidity, drinking water and water leakage monitoring modules are arranged on the outer wall of the cage box or the drinking water appliance, and are completely isolated from the inside of the feeding cavity, meeting the sterile environment requirements of SPF level experimental animals, and can significantly reduce the microbial pollution risk caused by the contact between the traditional sensor and the monitored object. Each monitoring module is powered by receiving the radio frequency energy of the RFID antenna of the reader, without the need for built-in batteries or external power supply, avoiding battery leakage pollution problems, and simplifying wiring, especially suitable for the environment with strict restrictions on power supply and wiring in the experimental animal barrier facility. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not constitute a limitation on the present application.

[0037] Figure 1 is a schematic diagram of the humidity monitoring module connected with the cage box according to the embodiment of the present application Figure 1 ;

[0038] Figure 2 is a schematic diagram of a humidity monitoring module connected to a cage according to an embodiment of the present application Figure 2 ;

[0039] Figure 3 is a schematic diagram of a humidity monitoring module connected to a cage according to an embodiment of the present application Figure 3 ;

[0040] Figure 4 is a schematic diagram of a humidity monitoring module according to an embodiment of the present application

[0041] Figure 5 is a schematic diagram of a drinking water monitoring module connected to a drinking water bottle according to an embodiment of the present application Figure 1 ;

[0042] Figure 6 is a schematic diagram of a drinking water monitoring module connected to a drinking water bottle according to an embodiment of the present application Figure 2 ;

[0043] Figure 7 is a schematic diagram of a drinking water monitoring module according to an embodiment of the present application

[0044] Figure 8 is a schematic diagram of a water leakage monitoring module connected to a cage according to an embodiment of the present application Figure 1 ;

[0045] Figure 9 is a schematic diagram of a water leakage monitoring module connected to a cage according to an embodiment of the present application Figure 2 ;

[0046] Figure 10 is a schematic diagram of a water leakage monitoring module according to an embodiment of the present application

[0047] Figure 11 is a schematic diagram of a water leakage monitoring module connected to a cage according to an embodiment of the present application Figure 3 ;

[0048] Figure 12 Figure 11 partial sectional view in the direction of A-A in Fig. 10;

[0049] Figure 13 Figure 12 enlarged view at B in Fig. 10;

[0050] Figure 14 is a schematic diagram of a humidity monitoring module communicating with an RFID reader / writer device according to an embodiment of the present application

[0051] Figure 15 is a schematic diagram of a drinking water monitoring module communicating with an RFID reader / writer device according to an embodiment of the present application

[0052] Figure 16Fig. 1 is a schematic diagram of a water leakage monitoring module according to an embodiment of the present application in communication with an RFID reader-writer device;

[0053] Fig. 1 is a schematic diagram of a water leakage monitoring module according to an embodiment of the present application in communication with an RFID reader-writer device;

[0054] 1, humidity monitoring module; 11, first sensor unit; 111, first electrode pair; 12, first analog-digital conversion unit; 13, first storage unit; 14, first communication unit; 141, first RFID chip; 142, first antenna; 15, first packaging unit;

[0055] 2, drinking water monitoring module; 21, second sensor unit; 211, second electrode pair; 22, second analog-digital conversion unit; 23, second storage unit; 24, second communication unit; 241, second RFID chip; 242, second antenna; 25, second packaging unit;

[0056] 3, water leakage monitoring module; 31, third sensor unit; 311, third electrode pair; 3111, third electrode pair parallel section; 3112, third electrode pair interdigital section; 32, third analog-digital conversion unit; 33, third storage unit; 34, third communication unit; 341, third RFID chip; 342, third antenna; 35, third packaging unit; 36, ring-shaped card; 37, ring-shaped buckle;

[0057] 4, cage box;

[0058] 5, drinking bottle. DETAILED DESCRIPTION

[0059] The present application can be used for experimental animal breeding and feeding, and provides sensors (humidity sensor, liquid level sensor, water leakage sensor) based on RFID technology to realize automatic monitoring of experimental animal feeding environment. Most of the sensors in the prior art cannot provide passive and wireless working mode, and are difficult to adapt to the special feeding environment of experimental animals (experimental animal barrier facilities). The sensors in the present application can be passive, wireless, contactless, and resistant to disinfection and sterilization, and are more suitable for the special feeding environment of experimental animals.

[0060] The present application will be described in detail below with reference to the embodiments. Each example is provided by way of explanation of the present application and is not intended to limit the present application. In fact, those skilled in the art will appreciate that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, features 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 application encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.

[0061] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and are not required to be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "connected", "connected", "provided" used in the present application should be understood broadly, for example, it can be fixed connection or detachable connection; it can be directly connected or indirectly connected through intermediate components; the specific meaning of the above terms can be understood by the person skilled in the art according to the specific circumstances.

[0062] As shown in Figures 1 to 16 The present application provides an experimental animal feeding environment monitoring system based on RFID technology, comprising:

[0063] A humidity monitoring module 1 is used to convert the bedding humidity into a first capacitance value and transmit the first capacitance value to the RFID reader-writer device to analyze the humidity value, wherein the humidity monitoring module 1 comprises a first sensor unit 11, and the first sensor unit 11 comprises a first electrode pair 111, which is arranged on both sides of the bedding, so that the first capacitance value changes with the change of the bedding humidity;

[0064] And / or, a drinking water monitoring module 2 is used to convert the water quantity of the drinking water bottle into a second capacitance value and transmit the second capacitance value to the RFID reader-writer device to analyze the water quantity value, wherein the drinking water monitoring module 2 comprises a second sensor unit 21, and the second sensor unit 21 comprises a second electrode pair 211, which is arranged on the outer wall of the drinking water bottle, so that the second capacitance value changes with the change of the water quantity of the drinking water bottle;

[0065] And / or, a water leakage monitoring module 3 is used to convert the water leakage state of the drinking water device into a third capacitance value and transmit the third capacitance value to the RFID reader-writer device to analyze the water leakage state judgment value, wherein the water leakage monitoring module 3 comprises a third sensor unit 31, and the third sensor unit 31 comprises a third electrode pair 311, which is arranged below the water outlet of the drinking water device, so that the third capacitance value changes with the change of the water leakage state of the drinking water device.

[0066] In specific implementation, the first capacitance sensor unit, the second capacitance sensor unit and the third capacitance sensor unit in the present application are all based on the same working principle: according to the calculation formula of capacitance (In the formula, C represents capacitance, ε represents dielectric constant, ε0 represents vacuum dielectric constant, A represents the opposite area of the two electrodes, The distance between the two electrodes is fixed during the use of the present application The facing area of the two electrodes The dielectric constant will change instantaneously when the humidity of the bedding, the water level of the drinking bottle or the state of the water leakage of the drinking device changes, thus changing the capacitance value. The change in the capacitance value can be finally converted into the reading of the sensor through calibration and the design of the electrode plate, and used to monitor the state of the experimental animal breeding environment.

[0067] Based on the humidity monitoring module provided by the present application, the dry and wet degree of the bedding at the bottom of the cage can be monitored, and real-time monitoring data can be transmitted to the production management system through the passive, wireless and non-contact RFID tag chip, so that the traditional schedule-based replacement of the bedding can be changed to condition-based replacement.

[0068] Based on the drinking water monitoring module provided by the present application, real-time data can be transmitted to the production management system to monitor the consumption of drinking water and provide early warning information, which can greatly help improve the efficiency of facility operation and management.

[0069] Based on the water leakage monitoring module provided by the present application, the water leakage in the cavity of the container for breeding experimental animals can be monitored and warned in real time, which can greatly help the daily production and operation of animal facilities

[0070] The humidity monitoring module, the drinking water detection module and the water leakage monitoring module in the present application can be applied to experimental animal production and breeding independently.

[0071] For example, when the water leakage monitoring module is combined with the drinking water monitoring module, the system can continue to track the change of the water leakage amount (which can be monitored by the drinking water detection module arranged on the drinking device) with time after receiving the water leakage alarm signal (which can be obtained according to the signal of the water leakage monitoring module), and provide strong data support for subsequent response and processing work.

[0072] For example, when the water leakage monitoring module is combined with the humidity monitoring module, the changes in the bedding humidity and the occurrence of water leakage can be monitored simultaneously. By comparing and analyzing the humidity changes and the water leakage state, it can be more accurately determined whether the increase in the bedding humidity is caused by normal environmental humidity changes or water leakage, which helps to quickly locate the problem source.

[0073] The experimental animal container is a cavity with a certain airtightness, and the microorganism level inside needs to be strictly controlled. Therefore, traditional humidity and liquid level sensors (complex mechanical structures or complex electrical components, etc.) are difficult to function in this scenario. Traditional liquid level sensors cannot withstand high-temperature and high-pressure disinfection, need power supply and signal cable connection, and will directly contact the monitored object, which will increase the risk of microbial contamination of the animal growth environment.

[0074] The humidity monitoring module, the drinking water detection module, and the water leakage monitoring module in the present application do not need to directly contact the monitored object because their working principle is based on the monitoring of capacitance value changes. For example, the liquid level sensor can be attached to the outer wall of the water bottle (without contaminating the drinking water), and the water leakage monitoring module / humidity monitoring module can be attached to the outer wall or bottom of the cage. The greatest advantage of this is that it does not affect the monitored object and does not contaminate the internal state environment of the monitored cavity.

[0075] The RFID reader / writer device can communicate with each monitoring module through ultra-high frequency (UHF) or high frequency (HF) communication protocols. The RFID reader / writer device has a built-in MCU module that can analyze the humidity value, water volume value, or water leakage state judgment value (water leakage state judgment value: when the third capacitance value exceeds the preset threshold, a signal is sent, and the logic is determined to be water leakage, such as binary signal "1" indicating water leakage and "0" indicating normal) after receiving the integrated coded data returned by each module, and can access the experimental animal production management system through Ethernet or wireless transmission (such as Wi-Fi). The production management system can display real-time cage environment data, set threshold alarms (such as humidity > 70%, water volume < 50 ml, or water leakage state triggering), and generate historical data reports for optimizing feeding processes (such as automatically adjusting bedding replacement plans and drinking bottle replacement frequency).

[0076] When deployed independently, a single cage can only install a humidity monitoring module, which is suitable for experimental animals (such as rodents) that are sensitive to bedding humidity; or only install a water leakage monitoring module, which is used for cage groups connected to an automatic water supply system.

[0077] When the combination is deployed, the same cage box can be installed with humidity and water leakage monitoring modules at the same time, and the system performs joint analysis on the two types of data through a time synchronization window (such as 1 minute): if the water leakage state is "1" and the humidity mutation rate is > 5% / min, it can be determined that the drinking water valve leakage causes the bedding to be wet, and the alarm is triggered and the cage box is located; if the water leakage state 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 the alarm.

[0078] When the shared reader is shared, the three types of monitoring modules of multiple cage boxes can share the same RFID reader device (such as a fixed reader installed on the side of the cage), and the uniqueness of the EPC code is used to distinguish different module data, thereby reducing the hardware cost. For example, the reader periodically polls each module (such as once per second), and the analyzed data is stored in the production management system according to the cage number.

[0079] When high-temperature disinfection is required, the packaging unit (such as the first packaging unit 15) of each module can be made of materials such as epoxy resin, polyimide, or nylon, which can withstand 121°C high-pressure steam sterilization, meeting the disinfection needs of experimental animal barrier facilities.

[0080] Traditional sensors need to invade the feeding environment (such as liquid level float ball, humidity probe), which may introduce microbial contamination risk. The electrodes of the present application are arranged on the outer wall of the cage or the drinking water device, completely isolated from the inside of the feeding cavity, meeting the sterile environment requirements of SPF (specific pathogen free) experimental animals.

[0081] The present application combines the energy collection function of the RFID tag (powered by receiving the radio frequency energy of the reader through the antenna) with the capacitive sensing, so that the monitoring module does not need to be built-in battery or external power supply, avoiding battery leakage pollution and wiring complexity. At the same time, the present application can integrate sensor data using EPC code, realizing the integration function of "one code identification + data transmission", compared with the traditional multiple device independent communication scheme, significantly simplifying the system architecture and improving the anti-interference ability.

[0082] When the humidity, water quantity, and water leakage modules are used in combination, the system can exclude interference through a joint algorithm (such as distinguishing between water leakage and animal excretion), and realize accurate alarm. For example, a single humidity increase may be caused by excretion or water leakage, but combined with the water leakage state signal, the real cause can be quickly located, and this multi-dimensional data fusion capability exceeds the limitations of traditional single parameter monitoring.

[0083] In one specific embodiment of the present application:

[0084] The humidity monitoring module 1 further comprises a first analog-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 litter through the first electrode pair 111 and converts it into a first capacitance value. The first analog-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-digital conversion unit 12 and records it. The first communication unit 14 receives an energy signal of an RFID reader-writer device to convert into electric energy required for driving the first sensor unit 11, the first analog-digital conversion unit 12 and the first storage unit 13 to work, and obtains the first digital signal value from the first storage unit 13 and returns it to the RFID reader-writer device through a carrier wave. The RFID reader-writer device analyzes a humidity value from the first digital signal value.

[0085] And / or, the drinking water monitoring module 2 further comprises a second analog-digital conversion unit 22, a second storage unit 23 and a second communication unit 24. The second sensor unit 21 detects the water volume of the drinking water bottle through the second electrode pair 211 and converts it into a second capacitance value. The second analog-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-digital conversion unit 22 and records it. The second communication unit 24 receives an energy signal of an RFID reader-writer device to convert into electric energy required for driving the second sensor unit 21, the second analog-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 returns it to the RFID reader-writer device through a carrier wave. The RFID reader-writer device analyzes a water volume value from the second digital signal value.

[0086] And / or, the water leakage monitoring module 3 further comprises a third analog-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 drinking water device through the third electrode pair 311 and converts it into a third capacitance value. The third analog-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-digital conversion unit 32 and records it. The third communication unit 34 receives an energy signal of an RFID reader-writer device to convert into electric energy required for driving the third sensor unit 31, the third analog-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 returns it to the RFID reader-writer device through a carrier wave. The RFID reader-writer device analyzes a water leakage state judgment value from the third digital signal value.

[0087] In implementation, the first / second / third sensor unit is configured to feed back the changes of litter humidity, water volume in the drinking bottle, and water leakage state in the cage to the changes of capacitance value; the first / second / third analog-to-digital conversion unit (ADC) is configured to convert the change of capacitance value to the change of digital signal value; the first / second / third storage unit is configured to acquire the digital signal value from the first / second / third analog-to-digital conversion unit and store the record; the first / second / third communication unit (RFID transponder unit) is configured to receive the energy signal from the RFID reader / writer device, convert the energy required for driving the capacitance sensor unit, the analog-to-digital conversion unit, and the storage unit, and acquire the capacitance change digital signal from the storage unit, and transmit the signal back to the RFID reader / writer device in the form of carrier wave; the RFID reader / writer device provides energy for the first / second / third communication unit, demodulates the received carrier wave signal, analyzes the capacitance change data, and converts the data to humidity value / water volume value / leakage state judgment value.

[0088] The first / second / third sensor unit can include two symmetrical flexible electrodes (or two interlaced interdigital electrodes), which are connected to the positive and negative poles of the first / second / third analog-to-digital conversion unit, respectively; the first / second / third sensor unit can sense the capacitance change of the skin level.

[0089] The first / second / third sensor unit does not need to be in direct contact with the monitored object, and when it is close to the monitored object (such as liquid level, water leakage, and litter humidity change) within a certain distance range, it can complete the state acquisition work. For example, when the litter humidity in the cage gradually increases, the dielectric constant between the two plates of the first sensor unit also increases, and the capacitance value also gradually increases within a certain time range. For another example, as the liquid level of the drinking bottle rises or falls, the dielectric constant between the two plates of the second electrode pair will also increase or decrease, thereby changing the capacitance value. For another example, when the third sensor unit is attached to the outer surface of the cage, if water leakage occurs inside the cage, the dielectric constant near the interdigital capacitor plate will instantaneously rise from 10 to dozens, according to the formula When other conditions remain unchanged, the increase of dielectric constant will correspondingly increase the capacitance value , thereby causing the instantaneous jump of the capacitance value of the capacitance sensor.

[0090] The first / second / third sensor unit accesses the first / second / third analog-to-digital conversion unit; when the humidity / water amount / leakage state between the first / second / third electrode pairs changes, the dielectric constant between the first / second / third electrode pairs changes, and further the instantaneous capacitance sensed by the first / second / third capacitive sensor unit changes; 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 sends the capacitance information in the first / second / third storage unit to the RFID reader / writer device through a carrier wave.

[0091] The first / second / third storage unit can include an EEPROM that obtains a digital signal value from the first / second / third analog-to-digital conversion unit and records it through an I2C communication protocol. Signal transmission can be subject to various interferences, such as electromagnetic interference, signal attenuation, etc. If the signal converted by the analog-to-digital conversion unit is directly output to the communication unit, once interference occurs during transmission, data can be lost or incorrect, resulting in inaccurate weight data. The presence of the storage unit can record the digital signal value after analog-to-digital conversion, and the communication unit can read data from the storage unit multiple times for transmission. Even if a problem occurs during transmission, data can be re-read and transmitted again to ensure data integrity and accuracy and improve system reliability.

[0092] In one embodiment of the present application:

[0093] The first communication unit 14 includes a first RFID chip 141 and a first antenna 142, the first antenna 142 receives an energy signal of the RFID reader / writer device to convert 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 the 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 through a carrier wave, and the RFID reader / writer device parses the humidity value from the first integrated EPC code;

[0094] And / or, the second communication unit 24 comprises a second RFID chip 241 and a second antenna 242, the second antenna 242 receives the energy signal of the RFID reader device to convert into electric energy, and the second antenna 242 supplies the second sensor unit 21, the second analog-digital conversion unit 22, the second storage unit 23 and the second RFID chip 241 with the electric energy, the second RFID chip 241 obtains the 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 to obtain a second integrated EPC code, the second antenna 242 returns the second integrated EPC code to the RFID reader device through a carrier wave, and the RFID reader device analyzes the water quantity value according to the second integrated EPC code;

[0095] And / or, the third communication unit 34 comprises 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 into electric energy, and the third antenna 342 supplies the third sensor unit 31, the third analog-digital conversion unit 32, the third storage unit 33 and the third RFID chip 341 with the electric energy, 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 to obtain a third integrated EPC code, the third antenna 342 returns the third integrated EPC code to the RFID reader device through a carrier wave, and the RFID reader device analyzes the water leakage state judgment value according to the third integrated EPC code.

[0096] In particular implementation, the analog-digital conversion unit, the storage unit, the RFID chip and the antenna in the application can be separate functional units or can be integrated in different units in the same chip. The whole humidity / drinking water / leakage monitoring module can be supplied with 3.3-volt voltage by the communication unit (RFID tag), so that no battery or power line is needed. The signal transmission can also be communicated with the RFID reader device through the communication unit, and if a super high frequency RFID chip is used, wireless data acquisition and transmission of several meters or even tens of meters can be provided.

[0097] The storage unit is electrically connected with the RFID chip, the RFID chip integrates the corresponding weight value with the EPC code of the RFID chip after obtaining the digital signal value from the storage unit. After the integration by the algorithm, the antenna returns the integrated EPC code to the RFID reader device through a carrier wave, realizes wireless transmission and identification of data, and facilitates identification and processing of the reader. More specifically, the application can only integrate part of the EPC code (Electronic Product Code). This is mainly to ensure the standardization and compatibility of the EPC code without affecting the accuracy, efficiency and safety of the data, so that the whole system can operate stably and reliably.

[0098] In one embodiment of the present application:

[0099] The litter is laid on the inside of the bottom of the cage 4, and the humidity monitoring module 1 is arranged on the outside of the bottom of the cage 4, wherein the two plates of the first electrode pair 111 are symmetrically arranged on the left and right sides of the bottom of the cage 4.

[0100] In specific implementation, the litter is laid on the inside of the bottom of the cage for absorbing excrement of experimental animals and maintaining a dry environment. The humidity monitoring module is arranged on the outside of the bottom of the cage to avoid direct contact with the litter and pollution. The two plates of the first electrode pair can be flexible electrodes (such as FPC printed copper foil plates) symmetrically pasted on the outer walls of the left and right sides of the bottom of the cage. The plate shape can be a long strip (for example, the length is consistent with the width of the bottom of the cage, and the width is 10 mm). When the humidity of the litter changes, the dielectric constant of the medium between the plates changes due to water infiltration 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, convert the capacitance signal into a digital quantity, store it in the first storage unit, and return it to the RFID reader device through the antenna by the first communication unit.

[0101] The traditional humidity probe needs to be inserted into the litter, which may carry microorganisms to pollute the internal environment of the cage, and does not meet the requirements of SPF level animal feeding. The present application non-contact monitors the humidity of the litter through the symmetric electrode pair on the outer wall of the cage, is completely isolated from the feeding cavity, and avoids cross contamination, which is a core problem that has not been solved by the prior art. The existing cage design does not consider sensor integration, and the monitoring device needs to be installed later, which leads to inconvenient installation and affects the stacking and storage of the cage. Further design can embed the electrode pair of the present application into 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 monitoring reliability.

[0102] The existing scheme mostly uses single-point monitoring (such as the center position of the cage), which cannot reflect the overall humidity distribution of the litter. The present application uses the symmetrically arranged long strip-shaped electrode pair to obtain the lateral average humidity value of the litter by using the spatial integration effect of the capacitance field, which significantly reduces the error compared with single-point monitoring.

[0103] In one embodiment of the present application:

[0104] The drinking water monitoring module 2 is arranged on the outside of the drinking water bottle 5, wherein the two plates of the second electrode pair 211 are connected in parallel on the outside of the side wall of the drinking water bottle 5.

[0105] In a specific embodiment, a recess for fixing the drinking water monitoring module can be arranged on the outer side of the drinking water bottle body. The second electrode pair can be arranged in parallel on the equal diameter part of the bottle body, avoiding the bottle neck area, to ensure that the water level monitoring covers the effective volume (such as the 50-250ml range of a 250ml bottle). When the water level is lower than 50ml, the system triggers a warning to replace the drinking water bottle. The non-automatic drinking water system relies on manual observation of the water level of the drinking water bottle, which is easy to cause the animal to lack water due to negligence. The present application can realize remote monitoring of the drinking water state (such as sending warning information through a mobile phone APP) by real-time monitoring of the water level through the parallel electrode pair and combining RFID wireless transmission, thereby reducing the frequency of manual inspection and greatly improving management efficiency.

[0106] In a specific embodiment of the present application:

[0107] The water leakage monitoring module 3 is arranged on the cage box support, and when the cage box 4 is inserted into the cage box support, the cage box 4 is attached to the water leakage monitoring module.

[0108] In a specific embodiment, the working principle of the water leakage monitoring module is based on the change of the capacitance value. When water leakage occurs, water flows along the front wall of the cage box to the bottom wall, changing the dielectric environment around the electrode pair and causing a sharp change in the capacitance value. After the third sensor unit detects this change in capacitance value, it converts it into an electrical signal and converts it into a digital signal value through an analog-to-digital conversion unit. The digital signal value is recorded by the storage unit and transmitted to the RFID reader device through the communication unit. The RFID reader device analyzes the water leakage state according to the received digital signal value, thereby realizing real-time monitoring and alarm of the water leakage phenomenon.

[0109] The humidity monitoring module, the drinking water monitoring module, and the water leakage monitoring module do not need to be in direct contact with the monitored object to cause contamination (contamination). The humidity monitoring module and the water leakage monitoring module can be attached to the outer wall of the cage box, and the drinking water monitoring module can be attached to the outer wall of the water bottle.

[0110] In a specific embodiment, the first electrode pair, the second electrode pair, and the third electrode pair can be made into different styles to realize different functions and be applied to different scenes or specific devices.

[0111] For example, the first electrode pair is made into two symmetrical long strip-shaped bipolar plates and is arranged in opposition on both 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.

[0112] The second electrode pair is made into a long strip-shaped bipolar plate and is installed on the side wall of the drinking water bottle, which can be used as a liquid level sensor to monitor the change of water level.

[0113] The third electrode plate is made into the form of an interdigital capacitor, which can be used as a water leakage sensor to monitor whether there is water leakage in the cage box. The interdigital capacitor is extremely sensitive to the instantaneous change of dielectric constant caused by water leakage.

[0114] In one embodiment of the present application:

[0115] The third electrode pair 311 includes a third electrode pair parallel segment 3111 and a third electrode pair interdigital segment 3112, the third electrode pair parallel segment 3111 extends from the outer side of the front wall of the cage 4 to the outer side of the bottom wall of the cage 4, and the third electrode pair interdigital segment 3112 is located on the outer side of the bottom wall of the cage 4.

[0116] In specific implementation, the third electrode pair parallel segment can be a long strip-shaped electrode plate vertically extending from the outer side of the front wall to the outer side of the bottom wall, used for monitoring the flow of water along the front wall; the third electrode pair interdigital segment can be a interdigital electrode plate located on the outer side of the bottom wall, used for monitoring the gathering state of water flow on the bottom wall. When the water dispenser leaks, the water flow first contacts the parallel segment electrode along the front wall, causing the capacitance value of the parallel segment to increase with the height of the water flow; because the interdigital segment capacitor is more sensitive, when the water flow flows to the bottom wall and covers the third electrode pair interdigital segment, the capacitance value measured by the third sensor unit jumps in a step. By analyzing the time sequence and amplitude of the capacitance change of the parallel segment and the interdigital segment, different stages of water leakage can be distinguished: only the parallel segment triggers a slight dripping, and both the parallel segment and the interdigital segment trigger a serious flow leakage.

[0117] In specific implementation, after being packaged, the humidity monitoring module, the drinking water monitoring module, and the water leakage monitoring module can be pasted on the outer surface of the monitored appliance in the form of adhesive, or can be embedded on the outer surface of the appliance by mechanical connection and close to the monitored area, or can be integrated with the appliance and packaged in the corresponding position of the shell of the appliance during injection molding.

[0118] In one embodiment of the present application:

[0119] The water leakage monitoring module is arranged on the outer side of the cage, and the water leakage monitoring module 3 further includes a third packaging unit 35, a ring-shaped clasp 36, and a ring-shaped 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-shaped clasp 36 is connected with the third packaging unit 35, the ring-shaped buckle 37 is connected with the front wall of the cage 4, and the third packaging unit 35 is connected on the outer side of the front wall of the cage 4 through the clasp connection between the ring-shaped clasp 36 and the ring-shaped buckle 37.

[0120] In specific implementation, the ring-shaped buckle can be connected with the front wall of the cage in various ways, for example, the ring-shaped buckle is injection molded as an embedded part on the outer side of the front wall of the cage, or the ring-shaped buckle is adhered to the front wall of the cage, or a circular through hole is formed in the front wall of the cage, and the ring-shaped buckle is designed as a "T-shaped" through structure including an inner fixed disc and an outer connecting buckle, the ring-shaped buckle passes through the through hole from the inner side of the cage, the inner fixed disc is attached to the inner side of the front wall, the through hole edge can be sealed by sealant to prevent steam from penetrating into the inner side of the cage during sterilization, and the ring-shaped clasp is connected with the outer connecting buckle.

[0121] The first / second / third packaging units can be made of PSU, PPSU, epoxy resin, polyimide, or nylon, etc. high-temperature-resistant and corrosion-resistant materials. PSU (polysulfone) and PPSU (polyphenylene sulfone resin) do not contain components such as phenolic aldehyde, and will not release harmful substances during high-temperature sterilization. After curing, the epoxy resin forms a three-dimensional network structure, has good mechanical strength, electrical insulation and chemical stability, can firmly protect the internal components, and prevent external factors from interfering with the normal work of the sensor. Polyimide is resistant to high temperatures and has excellent mechanical properties, can withstand harsh conditions in high-temperature environments, and ensures that the performance of the sensor is not affected. Nylon has high mechanical strength, good wear resistance, and strong chemical stability, which can enhance the durability of the sensor. These material properties are closely combined with the optimization of sensor performance, which can improve the overall performance of the sensor.

[0122] In one specific embodiment of the present application:

[0123] The first electrode pair 111 is a flexible electrode pair;

[0124] And / or, the second electrode pair 211 is a flexible electrode pair;

[0125] And / or, the third electrode pair 311 is a flexible electrode pair.

[0126] In specific implementation, the first electrode pair can adopt the form of FPC printed parallel electrode plates to monitor the drying condition of the litter; the second electrode pair can adopt the form of FPC printed parallel electrodes to monitor the water consumption condition of the drinking water bottle; and the third electrode pair can adopt the form of FPC printed interdigital capacitor to solve the problem of monitoring water leakage in the cavity of the container.

[0127] The flexible electrode pair can be made of various materials, such as flexible polymers such as polyimide (PI) or polyethylene terephthalate (PET) as the base material, and silver nanowires, copper foil or conductive ink materials can be used for the conductive part. The selection of these materials not only ensures the flexibility of the electrode pair, but also provides good electrical conductivity and corrosion resistance, so that it can operate stably for a long time in a high-temperature and high-pressure disinfection environment.

[0128] The first electrode pair of the humidity monitoring module adopts a flexible design, which can closely fit the curved surface of the cage box bottom, ensuring uniform sensing of litter humidity changes. The second electrode pair of the drinking water monitoring module also adopts a flexible design, which can adapt to the shape of the outer wall of the drinking water bottle, ensuring stable capacitance value detection. The third electrode pair of the water leakage monitoring module uses flexible material to fit the outside of the front wall and bottom wall of the cage box, which can effectively capture the dielectric constant changes on the water leakage path.

[0129] For example, the humidity monitoring module, the flexible electrode pair is installed on the outside of the cage bottom, and the two electrode plates are symmetrically arranged on the left and right sides of the cage bottom. The electrode pair is connected to the analog-digital conversion unit through conductive glue. The conductive glue not only provides good electrical connection, but also has certain flexibility, which can adapt to the possible bending and deformation of the cage bottom, and ensure the reliability of the connection. During installation, the flexible electrode pair can be slightly bent according to the shape of the cage bottom to ensure close contact with the cage surface. This close contact can improve the sensitivity of the electrode pair to the humidity change of the bedding, because the distance between the electrode pair and the bedding is more uniform, and the change of the dielectric constant can more accurately reflect the actual humidity state of the bedding.

[0130] In one specific embodiment of the present application:

[0131] The first sensor unit 11 is connected to the first analog-digital conversion unit 12 through conductive glue;

[0132] And / or, the second sensor unit 21 is connected to the second analog-digital conversion unit 22 through conductive glue;

[0133] And / or, the third sensor unit 31 is connected to the third analog-digital conversion unit 32 through conductive glue.

[0134] In specific implementation, the conductive glue can realize the electrical connection and mechanical fixation between the electrode pair and the analog-digital conversion unit, and also has certain flexibility, which can adapt to the slight movement between the electrode pair and the analog-digital conversion unit, and ensure the reliability of the connection. The sensor unit can be arranged opposite to the antenna pair. The sensor is arranged on one side of the chip (which can include an RFID chip, a storage unit and an analog-digital conversion unit), and the antenna is arranged on the other side of the chip. This layout can optimize the use of space, and also can reduce the mutual interference between the antenna and the sensor, and improve the stability and accuracy of signal transmission.

[0135] Since the RFID reader-writer device includes an MCU module, corresponding algorithm calculation can be performed. In specific implementation of the present application, specific algorithms can be combined to correct the collected values to obtain more accurate monitoring results.

[0136] In one specific embodiment of the present application:

[0137] The RFID reader-writer device analyzes the humidity value based on the following steps:

[0138] S11. Obtain the initial dry bedding capacitance value sequence , and calculate the reference mean value of the initial dry bedding capacitance value And the standard deviation , the normal humidity fluctuation threshold is defined as , wherein is an adaptive coefficient;

[0139] S12. Perform sliding window (window length ) mean filtering on the real-time collected litter capacitance value sequence to obtain

[0140] S13. Calculate the dynamic fluctuation coefficient , if ( is the burst fluctuation threshold, ), it is determined that the animal activity disturbance, trigger the following correction, get the corrected litter capacitance value:

[0141]

[0142] where is the smoothing factor ( ), determined by historical interference data training;

[0143] S14. Substitute the corrected litter capacitance value into the humidity conversion function , output the real-time humidity value, where , , are the fitting parameters obtained through litter humidity-capacitance calibration experiment.

[0144] In specific implementation, adjustments can be made according to the actual operating environment, such as , excessive humidity fluctuations caused by animal excretion and other abnormal conditions, which cannot effectively distinguish between normal noise and real humidity changes; too small is prone to misjudgment of normal fluctuations as interference, resulting in decreased monitoring sensitivity.

[0145] In traditional humidity monitoring, it is difficult to effectively suppress the influence of animal activity and other interference factors on humidity monitoring, while the present application can realize accurate identification and correction of animal activity interference by introducing dynamic fluctuation coefficient, burst fluctuation threshold and correction formula, etc., so as to greatly improve the humidity monitoring precision, and provide a new solution for experimental animal breeding environment humidity monitoring.

[0146] In one embodiment of the present application:

[0147] The experimental animal breeding environment monitoring system includes two or three of the humidity monitoring module, the drinking water monitoring module and the water leakage monitoring module, and the same RFID reader device is used for the two or three modules. The same RFID reader device is used for humidity value, water value or water leakage state value analysis based on the following steps:

[0148] ​​S21. Establish a time synchronization window for humidity, water quantity, and water leakage signal , the data in the same window is spatiotemporally aligned, wherein, the humidity value output by the humidity monitoring module; the water quantity value output by the drinking water monitoring module (corresponding to the remaining water quantity of the drinking water bottle, unit: ml); the water leakage state output by the water leakage monitoring module (such as, indicating the water leakage state, indicating the non-water leakage state, which can be determined based on the sudden change of the dielectric constant of the capacitor);

[0149] S22. Perform a water leakage-humidity joint determination, if and ( indicating the humidity mutation rate threshold, unit: % / min), it is determined as "water source leakage" (such as drinking water valve leakage penetrating into the bedding), otherwise it is marked as "animal excretion disturbance", and the humidity value is corrected: wherein , is the experimental calibration coefficient (for example , );

[0150] and / or, perform a water leakage-water quantity joint determination, if and ( is the upper limit of the normal drinking water rate of the experimental animal, unit: ml / min; indicating abnormal increase in water consumption rate), it is determined as "drinking water bottle rupture leakage", at which time the water leakage state correction can be triggered:

[0151]

[0152] which can be used to exclude the false judgment of water leakage state caused by the excretion of the experimental animal.

[0153] In the prior art, although there have been attempts to monitor parameters such as humidity, water quantity, and water leakage state, due to the lack of effective data fusion and joint determination methods, it is often difficult to accurately distinguish parameter changes caused by different reasons, resulting in frequent false positives and false negatives. The present application successfully solves this technical problem by establishing a time synchronization window and a joint determination mechanism, which can accurately determine the state of the experimental animal's feeding environment and exclude false positives. This innovative algorithm design and data processing method enables the monitoring system to more accurately reflect the actual environmental conditions, providing a more reliable basis for decision-making in feeding management.

[0154] In summary, the application applied to experimental animal feeding can solve the technical problem of low monitoring efficiency of experimental animal feeding environment.

[0155] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laboratory animal husbandry environment monitoring system based on RFID technology, characterized in that, include: Humidity monitoring module (1) is used to convert the humidity of the padding material into a first capacitance value and transmit the first capacitance value to the RFID reader / writer device to resolve the humidity value. The humidity monitoring module (1) includes a first sensor unit (11), the first sensor unit (11) includes a first electrode pair (111), the first electrode pair (111) is disposed on both sides of the padding material, so that the first capacitance value changes with the humidity of the padding material. The drinking water monitoring module (2) is used to convert the water volume of the drinking bottle into a second capacitance value and transmit the second capacitance value to the RFID reader device to resolve the water volume value. The drinking water monitoring module (2) includes a second sensor unit (21), which includes a second electrode pair (211). The second electrode pair (211) is disposed on the outer wall of the drinking bottle, so that the second capacitance value changes with the water volume of the drinking bottle. The water leakage monitoring module (3) is used to convert the water leakage status 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 status judgment value. The water leakage monitoring module (3) includes a third sensor unit (31), which includes a third electrode pair (311). The third electrode pair (311) is located below the water outlet of the water dispenser, so that the third capacitance value changes with the water leakage status of the water dispenser. The humidity monitoring module (1), the drinking water monitoring module (2), and the leakage monitoring module (3) all use the same RFID reader / writer device. The same RFID reader / writer device analyzes the humidity value, water volume value, or leakage status judgment value based on the following steps: S21. Establish a time synchronization window for humidity, water volume, and leakage signals. For data within the same window Spatiotemporal alignment is performed, where, The humidity value output by the humidity monitoring module; The water volume value output by the drinking water monitoring module; This refers to the leakage status output by the leakage monitoring module. Indicates a leaking condition. Indicates a non-leaking condition; S22. Perform a combined leak-humidity assessment; if... and If the humidity value is positive, it is determined as "water source leakage"; otherwise, it is marked as "animal excrement disturbance," and the humidity value is adjusted accordingly. ,in , These are the experimental calibration coefficients; Perform a combined leak and water volume assessment; if and If the condition is found to be "water bottle breakage and leakage", then the leakage status correction will be triggered. in, This represents the upper limit of the normal drinking rate for laboratory animals.

2. The experimental animal husbandry environment monitoring system based on RFID technology according to claim 1, characterized in that: The humidity monitoring module (1) further includes a first analog-to-digital converter (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 it into a first capacitance value. The first analog-to-digital converter (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 converter (12) and records it. The first communication unit (14) receives the energy signal from the RFID reader device and converts it into electrical energy required to drive the first sensor unit (11), the first analog-to-digital converter (12), and the first storage unit (13). It also obtains the first digital signal value from the first storage unit (13) 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 (2) further includes a second analog-to-digital converter (22), a second storage unit (23), and a second communication unit (24). The second sensor unit (21) detects the water volume of the drinking bottle through the second electrode pair (211) and converts it into a second capacitance value. The second analog-to-digital converter (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 converter (22) and records it. The second communication unit (24) receives the energy signal from the RFID reader device to convert it into electrical energy required to drive the second sensor unit (21), the second analog-to-digital converter (22), and the second storage unit (23). The second digital signal value is obtained from the second storage unit (23) and transmitted back to the RFID reader device via a carrier wave. The RFID reader device parses the water volume value according to the second digital signal value. And / or, the leakage monitoring module (3) further includes a third analog-to-digital converter (32), a third storage unit (33), and a third communication unit (34). The third sensor unit (31) detects the water dispenser leakage status through the third electrode pair (311) and converts it into a third capacitance value. The third analog-to-digital converter (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 converter (32) and records it. The third communication unit (34) receives the energy signal from the RFID reader device and converts it into electrical energy required to drive the third sensor unit (31), the third analog-to-digital converter (32), and the third storage unit (33). It also obtains the third digital signal value from the third storage unit (33) and transmits it back to the RFID reader device via a carrier wave. The RFID reader device parses the leakage status judgment value according to the third digital signal value.

3. The experimental animal husbandry 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 the energy signal of the RFID reader device and converts it into electrical energy, and uses this electrical energy to power the first sensor unit (11), the first analog-to-digital converter 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 its own EPC code 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 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 the energy signal of the RFID reader 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 its own EPC code to obtain a second integrated EPC code. The second antenna (242) transmits the second integrated EPC code back to the RFID reader device via a carrier wave. The RFID reader device parses the water volume 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 and converts 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 a third digital signal value from the third storage unit (33) and integrates the third digital signal value with its own EPC code 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 wave. The RFID reader device parses the leakage status judgment value according to the third integrated EPC code.

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

5. The experimental animal husbandry environment monitoring system based on RFID technology according to claim 3, characterized in that: The drinking water monitoring module (2) is located on the outside of the drinking water bottle (5), wherein the two 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 husbandry environment monitoring system based on RFID technology according to claim 3, characterized in that: The leakage monitoring module (3) is installed 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 leakage monitoring module (3).

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

8. The experimental animal husbandry environment monitoring system based on RFID technology according to claim 3, characterized in that: The leakage monitoring module (3) is located on the outside of the cage (4). The leakage monitoring module (3) also includes a third encapsulation 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 encapsulation unit (35). The ring card (36) is connected to the third encapsulation unit (35). The ring buckle (37) is connected to the front wall of the cage (4). The third encapsulation unit (35) is connected to the outside of the front wall of the cage (4) through the snap-fit ​​relationship between the ring card (36) and the ring buckle (37).

9. The experimental animal husbandry 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 husbandry 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 converter unit (12) via conductive adhesive; And / or, the second sensor unit (21) is connected to the second analog-to-digital converter unit (22) via conductive adhesive; And / or, the third sensor unit (31) is connected to the third analog-to-digital converter unit (32) via conductive adhesive.

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