Wireless passive temperature measurement system

Abstract

The utility model discloses a wireless passive temperature measurement system, which is characterized in that a temperature sensor sends measurement signals to second antennas through a first antenna, the second antennas transmit the signals to a receiver module, the signals are processed through a central processing unit to obtain accurate temperature data and position information, and through the configuration of a plurality of second antennas, the wireless passive temperature measurement system can be used for measuring the temperature. A plurality of temperature sensors can be managed at the same time, and each sensor carries out independent communication through different frequencies, so that the accuracy and high efficiency of multi-point temperature monitoring are ensured. The antenna selection module effectively controls the transmission and reception of signals, coordinates the work of the transmitter module and the receiver module, and ensures the stable transmission of the signals. Through a wireless communication mode, temperature data can be transmitted to the central processing unit in real time, fault risks possibly brought by traditional cable connection are reduced, the temperature monitoring system is more flexible and adapts to various environmental conditions and application scenes, and the hidden danger of system failure caused by battery power supply problems or cable damage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature measurement technical field, concretely relates to a wireless passive temperature measurement system. BACKGROUND

[0002] With the continuous development of modern power system, and the gradual increase of the types and quantities of power equipment, the safety and reliability of power equipment are increasingly important. Equipment failure and abnormality are often manifested by changes in temperature, therefore, temperature monitoring is an important means to ensure the normal operation of power equipment and prevent faults. In particular, in key power facilities such as substations, real-time temperature monitoring can effectively predict potential equipment failures and perform maintenance or repair in advance, thereby avoiding major accidents.

[0003] However, in existing temperature monitoring technology, the commonly used infrared temperature measurement technology can provide certain temperature data, but has significant shortcomings. The infrared temperature measurement technology is greatly affected by environmental factors, especially in the case of shiny or polished metal surfaces, the measurement results will have large errors, in addition, infrared temperature measurement is limited to measuring the surface temperature of an object, and cannot accurately obtain the internal temperature information of the object. When the temperature monitoring object is blocked or in a complex environment, the effectiveness of the infrared temperature measurement technology is further reduced. On the other hand, existing active wireless temperature measurement technology can achieve remote temperature monitoring, but due to its dependence on battery power supply, the battery life is limited and not suitable for long-term work in high temperature environments. Battery failure can cause equipment failure and even cause safety hazards such as electrolyte leakage, corrosion, and even explosion.

[0004] Therefore, in existing temperature monitoring technology, infrared temperature measurement is greatly affected by the environment and difficult to measure the internal temperature of an object, and active wireless temperature measurement is limited by battery life and easily affected by high temperature environments, which is a problem that needs to be solved. SUMMARY

[0005] Therefore, the utility model embodiment provides a wireless passive temperature measurement system to solve the problem of existing temperature monitoring technology, infrared temperature measurement is greatly affected by the environment and difficult to measure the internal temperature of an object, and active wireless temperature measurement is limited by battery life and easily affected by high temperature environments.

[0006] In order to achieve the above purpose, the utility model embodiment provides the following technical scheme:

[0007] A wireless passive temperature measurement system, the system comprises a temperature sensor, a transceiver module and a central processing unit;

[0008] The temperature sensor comprises an acoustic resonator and a first antenna;

[0009] The transceiving module comprises an antenna selection module, a transmitter module and a receiver module, and a plurality of second antennas each in wireless communication with the first antenna; a first end of the antenna selection module is connected with the central processor, a second end of the antenna selection module is connected with a plurality of the second antennas respectively, a third end of the antenna selection module is connected with a first end of the transmitter module, a fourth end of the antenna selection module is connected with a first end of the receiver module, a second end of the transmitter module and a second end of the receiver module are connected with the central processor respectively;

[0010] The temperature sensor sends a measurement signal to the second antenna through the first antenna, the second antenna sends the measurement signal to the central processor through the receiver module, and the central processor obtains temperature data and position information of the measured object according to the measurement signal.

[0011] In the above scheme, optionally, the surface acoustic resonator is a 420-450 MHz frequency band high-Q surface acoustic resonator.

[0012] In the above scheme, optionally, the number of the second antennas is four, and the working frequency band of the second antennas is a 420-450 MHz frequency band.

[0013] In the above scheme, optionally, each of the second antennas is in wireless communication with at least six temperature sensors, and different temperature sensors communicate with the second antennas through different frequency points.

[0014] In the above scheme, optionally, the transmitter module transmits a query signal to the plurality of second antennas through the antenna selection module, and the receiver module receives a response signal from the plurality of second antennas through the antenna selection module.

[0015] In the above scheme, optionally, the antenna selection module adopts a time division multiple access plus time division multiplexing mode for signal transmission and reception control.

[0016] In the above scheme, optionally, the system further comprises a communication module, and the central processor communicates with a base station through the communication module.

[0017] In the above scheme, optionally, the communication module is an RS485 communication module.

[0018] In the above scheme, optionally, the system further comprises a power supply, and output ends of the power supply are connected with the antenna selection module, the transmitter module, the receiver module and the central processor respectively.

[0019] The utility model at least has following beneficial effects:

[0020] The utility model provides a wireless passive temperature measurement system, through adopting wireless communication between temperature sensor and a plurality of second antennas, solve the problem of unable to effectively cope with multiple temperature measurement point monitoring simultaneously in background technology. Temperature sensor sends measurement signal to second antenna through first antenna, and second antenna transmits signal to receiver module, and through central processing unit to signal processing, obtains accurate temperature data and position information. The system can manage multiple temperature sensors simultaneously through the configuration of multiple second antennas, and each sensor communicates independently through different frequencies, ensuring the accuracy and efficiency of multi-point temperature monitoring. In addition, the antenna selection module effectively controls the transmission and reception of signals, coordinates the work of the transmitter module and the receiver module, and ensures stable transmission of signals. This design overcomes the limitations of single sensor or limited number of sensors in the prior art, and can support large-scale and wide-range temperature monitoring. Through wireless communication, temperature data can be transmitted to the central processing unit in real time, reducing the risk of failure that may be caused by traditional cable connection, and making the temperature monitoring system more flexible, adapting to various environmental conditions and application scenarios, and avoiding the risk of system failure caused by battery power supply problems or cable damage. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the prior art and the utility model more clearly, the drawings needed in the description of the prior art and the utility model embodiment will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can obtain other drawings from the provided drawings without creative labor.

[0022] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the utility model. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes of the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0023] Figure 1 A structure diagram of a wireless passive temperature measurement system provided by the utility model embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0025] In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two. The terms "first", "second", "third", "fourth" and the like (if exist) in the specification and claims of the utility model and the above-mentioned drawings are intended to distinguish the objects referred to. For the scheme with time sequence flow, this kind of term expression mode is not necessarily understood as describing a specific order or sequence, for the scheme of device structure, this kind of term expression mode does not exist the distinction such as important degree, position relation.

[0026] In addition, the terms "include", "have" and any variations thereof are intended to cover inclusive rather than exclusive inclusion, for example, a process, method, system, product or device that includes a list of steps or units is not necessarily limited to those explicitly listed steps or units, but can also include other steps or units that are not explicitly listed but are inherent to such processes, methods, products or devices, or steps or units added based on further optimization schemes of the utility model concept.

[0027] As shown in Figure 1 The system comprises a temperature sensor, a transceiver module and a central processor;

[0028] The temperature sensor comprises a surface acoustic resonator and a first antenna;

[0029] The transceiver module comprises an antenna selection module, a transmitter module and a receiver module, and a plurality of second antennas, each of the second antennas is in wireless communication with the first antenna; the first end of the antenna selection module is connected with the central processor, the second end of the antenna selection module is connected with a plurality of the second antennas respectively, the third end of the antenna selection module is connected with the first end of the transmitter module, the fourth end of the antenna selection module is connected with the first end of the receiver module, the second end of the transmitter module and the second end of the receiver module are connected with the central processor respectively;

[0030] Wherein, the temperature sensor sends a measurement signal to the second antenna through the first antenna, the second antenna sends the measurement signal to the central processor through the receiver module, and the central processor obtains temperature data and position information corresponding to the measured object according to the measurement signal.

[0031] The temperature sensor wirelessly communicates with the plurality of second antennas through the first antenna, each temperature sensor operates in a 420-450MHz frequency band, and energy is collected through electromagnetic wave induction by a surface acoustic wave resonator. In the transceiver module, the antenna selection module controls the signal transmission and reception of the plurality of second antennas, the transmitter module and the receiver module are respectively connected to the central processor, and signals are transmitted through the second antenna. The system does not need to be powered by a battery, and signals are transmitted from the temperature sensor to the receiver module by wireless means, and then temperature data and location information are obtained after being processed by the central processor.

[0032] Through the scheme, the problem of limited life of the battery-powered system in the prior art is solved, and the failure of the battery in a high-temperature environment and the trouble of replacing the battery are avoided. The wireless passive system enables the temperature sensor to work efficiently and stably when monitoring multiple points, and is not affected by the battery problem. In addition, through the configuration of the antenna selection module and the plurality of second antennas, the management of multiple temperature sensors and the synchronous collection of temperature data are realized, effectively solving the demand for multi-point monitoring and real-time data transmission, and improving the reliability and application range of the system.

[0033] In the embodiment, the surface acoustic wave resonator is a 420-450MHz frequency band high-Q surface acoustic wave resonator.

[0034] In the embodiment, the number of the second antennas is four, and the operating frequency band of the second antennas is 420-450MHz.

[0035] In the embodiment, each of the second antennas wirelessly communicates with at least six temperature sensors, and different temperature sensors communicate with the second antennas through different frequency points.

[0036] In the embodiment, the transmitter module transmits a query signal to the plurality of second antennas through the antenna selection module, and the receiver module receives a response signal from the plurality of second antennas through the antenna selection module.

[0037] In the embodiment, the antenna selection module adopts a time division multiple access plus time division multiplexing mode to control the transmission and reception of signals.

[0038] In the embodiment, the system further comprises a communication module, and the central processor communicates with a base station through the communication module.

[0039] In the embodiment, the communication module is an RS485 communication module.

[0040] In the embodiment, the system further comprises a power supply, and the output ends of the power supply are respectively connected to the antenna selection module, the transmitter module, the receiver module and the central processor.

[0041] The embodiment solves the problem of simultaneous monitoring of multiple temperature measurement points in the background art by using wireless communication between the temperature sensor and the multiple second antennas. The temperature sensor sends a measurement signal to the second antenna through the first antenna, the second antenna transmits the signal to the receiver module, and the signal is processed by the central processor to obtain accurate temperature data and position information. The system can manage multiple temperature sensors simultaneously through the configuration of multiple second antennas, and each sensor communicates independently through different frequencies to ensure the accuracy and efficiency of multi-point temperature monitoring. In addition, the antenna selection module effectively controls the transmission and reception of signals, coordinates the work of the transmitter module and the receiver module, and ensures stable transmission of signals. The design overcomes the limitations of single sensor or limited number of sensors in the prior art, and can support large-scale and wide-range temperature monitoring. Through wireless communication, temperature data can be transmitted to the central processor in real time, reducing the risk of failure that may be caused by traditional cable connection, and making the temperature monitoring system more flexible to adapt to various environmental conditions and application scenarios, avoiding the hidden danger of system failure due to battery power supply problems or cable damage.

[0042] In one embodiment, a wireless passive temperature measurement device system is provided. The wireless passive temperature measurement system structure of the embodiment uses electromagnetic wave coupling to collect energy. Compared with other passive sensors such as optical fiber sensors and infrared sensors, the sensor uses electromagnetic wave induction, does not require a battery for driving, and does not require a wire connection, and can realize temperature collection of the measured object, automatically analyzes and collects state information such as the temperature of the power transformation equipment with identification information, realizes early warning, and realizes the judgment of normal, abnormal, and serious states of the equipment according to relevant maintenance procedures.

[0043] The wireless passive temperature measurement system of the embodiment is composed of a temperature sensor, an antenna, a transceiver switching and antenna switch selection module, a transmitter module, a receiver module, a DSP central processor and a software algorithm processing module, an RS485 communication module, and a power supply module. The temperature sensor for temperature measurement of the measured object does not require a battery and does not require a wire connection, is used for real-time temperature monitoring of a smart power grid, and ensures safe operation of a substation.

[0044] The wireless passive temperature measurement system of the embodiment is composed of a temperature sensor, an antenna, a transceiver switching and antenna switch selection module, a transmitter module, a receiver module, a DSP central processor and a software algorithm processing module, an RS485 communication module, and a power supply module. The specific description is as follows:

[0045] The temperature sensor is composed of a 420-450MHz frequency band high-Q surface acoustic resonator and a small-size antenna 1, and the temperature sensor is in wireless communication with four 420-450MHz frequency band flat antennas 2, each antenna manages six temperature sensors, four antennas can manage 24 temperature sensors, and the 24 temperature sensors are composed of 24 temperature sensors of different frequencies, and each frequency point can define the position of a different measured object. The working process is as follows: the flat antenna 2 sends a specific frequency signal in the 420-450MHz frequency band, which is received by the temperature sensor antenna 1 to excite the surface acoustic resonator in the sensor to generate a reflected frequency signal, which is then transmitted by the antenna 1 and received by the antenna 2. The frequency of the electric wave signal output by the resonator changes with the change of the ambient temperature, so the radio frequency signal received by the antenna 2 carries temperature information and position information of the measured object.

[0046] The 420-450MHz frequency band specific frequency signal is sent to the antenna 2 by a DSP central processor and software algorithm processing module, and the radio frequency signal carrying temperature information and position information of the measured object received by the antenna 2 is transmitted back to the DSP central processor and software algorithm processing module for operation and processing to obtain temperature and position information of the measured object, which is transmitted to a base station control command center through an RS485 communication module.

[0047] The communication uplink, communication downlink and frequency selection are controlled by a transceiver switching and antenna switch selection module, and the communication mode is time division multiple access plus time division multiplexing.

[0048] The transmitter module is controlled by the DSP central processor and software algorithm processing module to transmit a radio frequency pulse query signal to the antenna 2, and then the receiver module receives a response pulse signal, and the DSP central processor and software algorithm processing module demodulate the signal.

[0049] The power module generates DC 24V, 12V and 5V power sources respectively to power the above-mentioned transceiver switching and antenna switch selection module, transmitter module, receiver module, DSP central processor and software algorithm processing module, and RS485 communication module.

[0050] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A wireless passive temperature measurement system, characterized by The system comprises a temperature sensor, a transceiver module and a central processor; The temperature sensor comprises a surface acoustic resonator and a first antenna; The transceiver module comprises an antenna selection module, a transmitter module and a receiver module, and a plurality of second antennas, each of which is in wireless communication with the first antenna; a first end of the antenna selection module is connected with the central processor, a second end of the antenna selection module is connected with a plurality of the second antennas respectively, a third end of the antenna selection module is connected with a first end of the transmitter module, a fourth end of the antenna selection module is connected with a first end of the receiver module, a second end of the transmitter module and a second end of the receiver module are connected with the central processor respectively; The temperature sensor sends a measurement signal to the second antenna through the first antenna, the second antenna sends the measurement signal to the central processor through the receiver module, and the central processor obtains temperature data and position information corresponding to the measured object according to the measurement signal; Each of the second antennas is in wireless communication with at least six temperature sensors, and different temperature sensors communicate with the second antennas through different frequency points. The antenna selection module adopts time division multiple access and time division multiplexing to control the transmission and reception of signals.

2. The wireless passive temperature measurement system according to claim 1, characterized in that The surface acoustic resonator is a 420-450MHz frequency band high-Q surface acoustic resonator.

3. The wireless passive temperature measurement system of claim 1, wherein, The number of the second antennas is four, and the working frequency band of the second antennas is 420-450MHz.

4. The wireless passive temperature measurement system of claim 1, wherein, The transmitter module transmits a query signal to the plurality of second antennas through the antenna selection module, and the receiver module receives a response signal from the plurality of second antennas through the antenna selection module.

5. The wireless passive temperature measurement system of claim 1, wherein, The system further comprises a communication module, and the central processor communicates with a base station through the communication module.

6. The wireless passive temperature measurement system of claim 5, wherein, The communication module is an RS485 communication module.

7. The wireless passive temperature measurement system of claim 1, wherein, The system further comprises a power supply, and the output ends of the power supply are connected with the antenna selection module, the transmitter module, the receiver module and the central processor respectively.

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