Wireless passive temperature measuring device used in large temperature difference environment

Abstract

The invention discloses a wireless passive temperature measuring device used in a large-temperature-difference environment. The wireless passive temperature measuring device comprises a large-temperature-difference thermoelectric energy conversion device, an energy management and storage part, a wireless temperature measuring part and an upper computer. The large-temperature-difference thermoelectric energy conversion device is used for converting heat energy in a large-temperature-difference environment into electric energy, effective collection of energy is achieved, and the hot end of the energy conversion device can work in a high-temperature environment. The energy management and storage circuit is used for adjusting the electric energy generated by the thermoelectricity, ensuring that the output voltage is stable, and storing the electric energy in an energy storage device for a subsequent circuit to use; the temperature measuring circuit is matched with a high-precision temperature sensor and is used for monitoring and collecting temperature data in real time; the wireless communication circuit is used for monitoring and collecting temperature data in real time; and the upper computer is used for processing, displaying and storing the received temperature data in real time. According to the invention, self energy supply can be realized through energy collection in a large temperature difference environment, and high-accuracy temperature measurement and wireless data transmission are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of thermoelectric energy conversion passive sensing, and in particular relates to a wireless passive temperature measuring device used in a large temperature difference environment. Background Art

[0002] In engineering, sensors are needed to obtain environmental parameters. Among them, temperature sensors can sense the temperature of an object and output proportional electrical signals. They are widely used in the development, use and maintenance of a variety of equipment such as aerospace vehicles and gas engines. Although wired active temperature sensing systems meet the use requirements under most engineering conditions, with the continuous improvement of equipment performance and the continuous enrichment of functional requirements, in the links of research and development, design and manufacturing, the existing active wired temperature sensing technology often cannot meet the temperature measurement requirements under complex conditions, which is reflected in the following aspects:

[0003] The space inside the equipment is limited. In the limited space inside the equipment, the number of temperature sensor wiring cannot be increased indefinitely under the conditions of ensuring safety and stability. The limited number of measurement channels will not be able to provide a temperature measurement basis for the high performance of equipment (such as engines, etc.), which will cause a bottleneck for the improvement of future equipment performance.

[0004] Some equipment has a high temperature environment inside. For example, in the cooling channel of a gas turbine, the temperature of the pipe wall reaches 800-950°C. The sensor cables need to be shielded and protected with magnesium oxide and stainless steel, which greatly increases the cost and weight.

[0005] Batteries usually have a short lifespan and need to be replaced or recharged regularly. Wireless sensors can be powered by batteries, but when there are a large number of sensor nodes, it is often expensive to regularly replace or recharge the batteries. For equipment with harsh sensor deployment environments, it is very difficult to manually replace or recharge batteries. For a large number of sensor nodes, it is difficult to rely on manpower to promptly detect all nodes with abnormal power supply and replace or recharge their batteries in a timely manner.

[0006] Therefore, a wireless passive temperature measurement device is needed to get rid of the limitations of power supply and communication cables, overcome the shortcomings of battery power supply, realize the long-term stable operation of wireless temperature sensors, and provide support for the research and development of equipment. Summary of the invention

[0007] The purpose of the present invention is to provide a wireless passive temperature measuring device for use in a large temperature difference environment, which can realize self-power supply through energy collection in a large temperature difference environment, and realize high-accuracy temperature measurement and wireless transmission of data.

[0008] In order to achieve the above-mentioned object, one aspect of the present invention provides a wireless passive temperature measurement device for use in a large temperature difference environment, comprising a large temperature difference thermoelectric energy conversion device, an energy management and storage part, a wireless temperature measurement part and a host computer;

[0009] The large temperature difference thermoelectric energy conversion device comprises a high temperature resistant hot end, a plurality of high temperature resistant thermoelectric energy conversion devices connected in series, a heat dissipation cold end, a high thermal conductivity heat dissipation device and a high temperature resistant insulating protective shell. The high temperature resistant thermoelectric energy conversion device is fixed in the high temperature resistant insulating protective shell and is used to convert thermal energy in a large temperature difference environment into electrical energy and transmit the electrical energy to an energy management and storage part. The high temperature resistant hot end is used to conduct heat in a high temperature environment to one end of the high temperature resistant thermoelectric energy conversion device. The other end of the high temperature resistant thermoelectric energy conversion device is connected to a high thermal conductivity heat dissipation device located at the heat dissipation cold end. The heat dissipation cold end is located in a normal temperature environment, thereby generating a large temperature difference between the high temperature hot end and the heat dissipation cold end of the high temperature resistant thermoelectric energy conversion device.

[0010] The energy management and storage part is connected to the large temperature difference thermoelectric energy conversion device, and is used to manage and store the electric energy obtained from the large temperature difference thermoelectric energy conversion device, and provide a stable power supply for the wireless temperature measurement part;

[0011] The wireless temperature measurement part includes a temperature sensor, a temperature measurement circuit and a wireless communication circuit. The temperature sensor and the high temperature resistant thermoelectric energy conversion device are arranged side by side at the high temperature resistant hot end, and are used to collect and measure the temperature signal at the high temperature resistant hot end in real time. The temperature measurement circuit obtains electric energy from the energy management and storage part, and amplifies and digitizes the signal collected by the temperature sensor to obtain temperature data; the wireless communication circuit is connected to the temperature measurement circuit, and is used to send the temperature data to the host computer by wireless communication;

[0012] The host computer is used to process, display and store the received temperature data in real time.

[0013] Preferably, the multiple high-temperature resistant thermoelectric energy conversion devices connected in series are all made of metal materials with excellent high-temperature resistance and good thermoelectric conversion efficiency, and the multiple high-temperature resistant thermoelectric energy conversion devices are connected in series using high-temperature durable materials.

[0014] Preferably, the high temperature resistant hot end is a composite structure of high temperature resistant ceramic and metal materials, and the high thermal conductivity heat dissipation device adopts high thermal conductivity metal materials and maximizes the surface area, so that a large temperature difference is maintained between the high temperature resistant hot end and the heat dissipation cold end of the large temperature difference thermoelectric energy conversion device, thereby improving the efficiency of energy collection.

[0015] Preferably, a large temperature difference thermoelectric energy conversion device, an energy management and storage part, and a wireless temperature measurement part constitute a wireless passive measurement node. The host computer includes host computer software, a display, an industrial computer and a wireless receiving circuit. Multiple wireless passive temperature measurement nodes send temperature data to the industrial computer and the wireless receiving circuit via wireless communication. The host computer processes, displays and stores the temperature data in real time via the host computer software, and displays it on the display.

[0016] Preferably, the wireless communication circuit adopts low-power wireless communication technology to achieve efficient and stable transmission of temperature data.

[0017] The wireless passive temperature measurement device for use in a large temperature difference environment according to the above aspects of the present invention can realize self-powering through energy collection in a large temperature difference environment, and achieve high-accuracy temperature measurement and wireless transmission of data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0019] Figure 1 This is a system composition block diagram of a wireless passive temperature measurement device for a large temperature difference environment according to an embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a wireless passive temperature measurement device for use in a large temperature difference environment according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the use of a wireless passive temperature measurement device for a large temperature difference environment according to an embodiment of the present invention;

[0022] Figure 4 The figure is a schematic diagram of wireless communication between multiple wireless passive temperature measurement nodes and a host computer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] An embodiment of the present invention provides a wireless passive temperature measurement device for use in a large temperature difference environment, such as Figure 1 As shown, the wireless passive temperature measurement device for a large temperature difference environment according to an embodiment of the present invention includes a large temperature difference thermoelectric energy conversion device, an energy management and storage part, a wireless temperature measurement part and a host computer.

[0025] The large temperature difference thermoelectric energy conversion device includes a high temperature resistant hot end, a plurality of high temperature resistant thermoelectric energy conversion devices connected in series, a heat dissipation cold end, a high thermal conductivity heat dissipation device and a high temperature resistant insulating protective shell; the high temperature resistant thermoelectric energy conversion device is fixed in the high temperature resistant insulating protective shell, and is used to convert thermal energy in a large temperature difference environment into electrical energy, and transmit the electrical energy to the energy management and storage part.

[0026] like Figure 2 As shown, the high temperature resistant hot end 1 is a composite structure of high temperature resistant ceramic and metal materials, which can fully conduct heat in a high temperature environment to one end of a high temperature resistant thermoelectric energy conversion device 4. The other end of the high temperature resistant thermoelectric energy conversion device 4 is connected to a high thermal conductivity heat dissipation device located at the heat dissipation cold end 2, and the heat dissipation cold end 2 and the circuit part 3 of the device are located in a normal temperature environment. This structure causes a large temperature difference to be generated at both ends of the high temperature resistant thermoelectric energy conversion device 4 in series, thereby generating electrical energy required to meet the needs of subsequent circuits. The high-precision temperature sensor 5 and the high temperature resistant thermoelectric energy conversion device 4 are arranged side by side, and the temperature at the high temperature resistant hot end 1 can be measured in real time. The high temperature resistant hot end 1 can operate in a high temperature environment of 1000°C. As Figure 3 As shown, the high temperature resistant hot end 1 is placed in a high temperature cavity 7 where the temperature needs to be measured, and the heat dissipating cold end 2 is placed in a room temperature environment, so that wireless passive high-accuracy temperature measurement can be achieved.

[0027] The multiple high temperature resistant thermoelectric energy conversion devices 4 connected in series are all made of metal materials with excellent high temperature resistance and good thermoelectric conversion efficiency. The output voltage and output power of the device can be significantly improved by connecting in series while maintaining a low internal resistance. The connection of the multiple high temperature resistant thermoelectric energy conversion devices uses high temperature durable materials to avoid melting or breaking at high temperatures, thereby ensuring the reliability of the entire device.

[0028] The high thermal conductivity heat sink is made of a high thermal conductivity metal material and is made of a plurality of high thermal conductivity metal columns. The structure is designed to maximize its surface area and enhance the heat dissipation capacity. This design allows a large temperature difference to be maintained between the hot end and the cold end of the large temperature difference thermoelectric energy conversion device, significantly improving the efficiency of energy collection. The heat dissipation cold end 2 dissipates heat by natural convection, ensuring that the large temperature difference thermoelectric energy conversion device can operate long-term and effectively in a high temperature environment, and ensuring that the device can stably output electrical energy in a large temperature difference environment.

[0029] The energy management and storage part is connected to the large temperature difference thermoelectric energy conversion device, and is used to manage and store the electric energy obtained from the large temperature difference thermoelectric energy conversion device, adjust the obtained electric energy, and ensure the stability of the output voltage, thereby converting the unstable energy supply of the large temperature difference thermoelectric energy conversion device into a stable energy supply, and providing a stable power supply for the subsequent temperature measurement circuit and wireless communication circuit of the wireless temperature measurement part. The energy management and storage part includes an energy management circuit and an energy storage device, and the energy storage device is used to store the electric energy obtained from the large temperature difference thermoelectric energy conversion device, and provide a stable power supply for the subsequent circuit through the energy management circuit.

[0030] The wireless temperature measurement part includes a high-precision temperature sensor, a temperature measurement circuit, a wireless communication circuit and a host computer; the temperature sensor is used to collect temperature data in real time; the temperature measurement circuit obtains electrical energy from the energy management and storage part, amplifies and digitally processes the signal collected by the temperature sensor, and realizes high-accuracy measurement of temperature data. The wireless communication circuit is connected to the temperature measurement circuit, and the processed temperature data is sent to the host computer by wireless communication. The wireless communication circuit includes a microprocessor circuit with wireless transceiver function and an antenna.

[0031] The host computer is connected to the temperature measurement circuit through wireless communication, which is used for real-time processing, real-time display and storage of received temperature data. Figure 4 As shown, the host computer includes host computer software, display 10, industrial computer and wireless receiving circuit 11. Large temperature difference thermoelectric energy conversion device, energy management and storage part, wireless temperature measurement part constitute wireless passive measurement node 12. Multiple wireless passive temperature measurement nodes 12 send temperature data to industrial computer and wireless receiving circuit 11 by wireless communication, and the data is processed, displayed and stored in real time by the host computer software, and displayed on the display 10. The wireless communication circuit adopts low-power wireless communication technology to realize efficient and stable transmission of temperature data. In the case of multiple wireless passive temperature measurement nodes, a reasonable network topology structure is used to ensure that each node can communicate well with the host computer, which greatly improves the automation degree and practical value of the device.

[0032] The working process of the wireless passive temperature measurement device for a large temperature difference environment of the embodiment of the present invention is as follows: in a large temperature difference environment, the high temperature resistant thermoelectric energy conversion device first converts the heat energy in the environment into electrical energy through the thermoelectric effect. The high thermal conductivity heat dissipation device maintains a large temperature difference between the hot end and the cold end of the thermoelectric energy conversion device through effective heat conduction, thereby realizing efficient energy collection. The converted electrical energy will be transmitted to the energy management and storage part, and by boosting and storing the electrical energy, a stable and suitable power supply can be provided for the subsequent circuit. The electrical energy storage device in the energy management circuit is responsible for storing the electrical energy obtained from the large temperature difference thermoelectric energy conversion device and supplying power to the subsequent temperature measurement circuit and wireless communication circuit. The temperature measurement circuit obtains stable electrical energy from the energy management and storage part to ensure operation in a low power consumption state. The temperature measurement circuit amplifies and digitizes the signal of the high-precision temperature sensor, obtains highly accurate temperature data, and transmits the data to the wireless communication circuit. The wireless communication circuit is responsible for transmitting the processed temperature data to the host computer wirelessly. The host computer is connected to the temperature measurement circuit through wireless communication to realize the real-time processing, real-time display and storage of the received temperature data. The software equipped with the host computer can display the temperature curve in real time and analyze and process the data. The whole working process forms a highly integrated and efficient wireless passive temperature measurement system that can work stably in a large temperature difference environment.

[0033] The wireless passive temperature measurement device for use in a large temperature difference environment according to the embodiment of the present invention has the following beneficial effects:

[0034] 1. Self-powered design: This device effectively collects environmental heat energy through large temperature difference thermoelectric energy conversion devices to achieve self-powered. This design reduces dependence on external power sources, can operate stably for a long time in a large temperature difference environment, and avoids the maintenance cost and trouble caused by traditional battery replacement.

[0035] 2. High-precision measurement: The temperature measurement circuit can ensure high-accuracy temperature measurement through high-precision temperature sensors. This high-accuracy temperature data is crucial for equipment research and development, industrial monitoring and other applications.

[0036] 3. Real-time data transmission: The wireless communication circuit can transmit the processed temperature data to the host computer in real time, ensuring that the monitoring system can obtain the latest temperature information at any time.

[0037] 4. Multi-node monitoring: The wireless passive temperature measurement device supports the arrangement of multiple nodes and can monitor the temperature of multiple locations at the same time. This multi-point monitoring capability enables a more comprehensive monitoring of the temperature distribution within the system.

[0038] 5. Large temperature difference resistance: The high temperature resistance design of the hot end of the device ensures that it can operate stably in a large temperature difference environment above 1000℃, meeting the needs of industries, aerospace, geological exploration and other fields. This high temperature resistance improves the reliability of the system under large temperature difference conditions.

[0039] 6. Simplified maintenance: The device uses wireless communication and passive power supply, so users do not need to frequently maintain batteries or power cords, reducing the complexity and cost of daily maintenance. This advantage is particularly obvious for long-term monitoring applications.

[0040] 7. Integration and automation: The system's integrated design and high degree of automation make it easier for users to operate during use. The host computer software can easily monitor, analyze and set alarms for temperature data, improving the user experience.

[0041] 8. The present invention also has the advantages of high temperature resistance, good integrity and high degree of automation.

[0042] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wireless passive temperature measurement device for use in a large temperature difference environment, characterized in that: It includes large temperature difference thermoelectric energy conversion device, energy management and storage part, wireless temperature measurement part and host computer; The large temperature difference thermoelectric energy conversion device comprises a high temperature resistant hot end, a plurality of high temperature resistant thermoelectric energy conversion devices connected in series, a heat dissipation cold end, a high thermal conductivity heat dissipation device and a high temperature resistant insulating protective shell. The high temperature resistant thermoelectric energy conversion device is fixed in the high temperature resistant insulating protective shell and is used to convert thermal energy in a large temperature difference environment into electrical energy and transmit the electrical energy to an energy management and storage part. The high temperature resistant hot end is used to conduct heat in a high temperature environment to one end of the high temperature resistant thermoelectric energy conversion device. The other end of the high temperature resistant thermoelectric energy conversion device is connected to a high thermal conductivity heat dissipation device located at the heat dissipation cold end. The heat dissipation cold end is located in a normal temperature environment, thereby generating a large temperature difference between the high temperature hot end and the heat dissipation cold end of the high temperature resistant thermoelectric energy conversion device. The energy management and storage part is connected to the large temperature difference thermoelectric energy conversion device, and is used to manage and store the electric energy obtained from the large temperature difference thermoelectric energy conversion device, and provide a stable power supply for the wireless temperature measurement part; The wireless temperature measurement part includes a temperature sensor, a temperature measurement circuit and a wireless communication circuit. The temperature sensor and the high temperature resistant thermoelectric energy conversion device are arranged side by side at the high temperature resistant hot end, and are used to collect and measure the temperature signal at the high temperature resistant hot end in real time. The temperature measurement circuit obtains electric energy from the energy management and storage part, and amplifies and digitizes the signal collected by the temperature sensor to obtain temperature data; the wireless communication circuit is connected to the temperature measurement circuit, and is used to send the temperature data to the host computer by wireless communication; The host computer is used to process, display and store the received temperature data in real time.

2. The wireless passive measurement device for use in a large temperature difference environment according to claim 1, characterized in that: The multiple high-temperature resistant thermoelectric energy conversion devices connected in series are all made of metal materials with excellent high-temperature resistance and good thermoelectric conversion efficiency, and the multiple high-temperature resistant thermoelectric energy conversion devices are connected in series using high-temperature durable materials.

3. The wireless passive measurement device for use in a large temperature difference environment according to claim 1 or 2, characterized in that: The high-temperature resistant hot end is a composite structure of high-temperature resistant ceramic and metal materials. The high-thermal conductivity heat dissipation device adopts high-thermal conductivity metal materials and maximizes the surface area, so that a large temperature difference is maintained between the high-temperature resistant hot end and the heat dissipation cold end of the large temperature difference thermoelectric energy conversion device, thereby improving the efficiency of energy collection.

4. The wireless passive measurement device for use in a large temperature difference environment according to claim 1 or 2, characterized in that: The large temperature difference thermoelectric energy conversion device, energy management and storage part, and wireless temperature measurement part constitute a wireless passive measurement node. The host computer includes host computer software, display, industrial computer and wireless receiving circuit. Multiple wireless passive temperature measurement nodes send temperature data to the industrial computer and wireless receiving circuit through wireless communication. The host computer processes, displays and stores the temperature data in real time through the host computer software, and displays it on the display.

5. The wireless passive measurement device for use in a large temperature difference environment according to claim 1 or 2, characterized in that: The wireless communication circuit adopts low-power wireless communication technology to achieve efficient and stable transmission of temperature data.

Images