Novel high-temperature-resistant wireless passive temperature measuring device

Abstract

The invention discloses a novel high-temperature-resistant wireless passive temperature measuring device, and belongs to the technical field of thermal metering testing. According to the device, the temperature measuring device is tightly attached to the surface to be measured through the adsorption auxiliary module made of magnetic attraction or high-temperature glue, the hot end of the passive energy supply module and the temperature measuring sensor make contact with the high-temperature position to be measured at the same time, and electric energy is provided for the ultra-low power consumption temperature measuring and wireless transmitting module after the cold end and the hot end of the passive energy supply module generate the temperature difference. Electrical parameters of the temperature measurement sensor are measured by the electrical measurement module and are transmitted to an external receiving end through the wireless transmitting module, so that a real-time online measurement function is realized. The problems that an active energy supply battery is poor in safety and short in endurance time under the high-temperature condition, and circuits such as a temperature measuring module and a wireless transmitting module are intolerant to high temperature are solved, and a solution thought of a wireless passive principle is provided for a special temperature measuring scene.

Description

Technical Field

[0001] This invention belongs to the field of thermal metrology and testing technology, and in particular relates to a novel high-temperature resistant wireless passive temperature measurement device. Background Technology

[0002] Temperature is a key physical quantity, and there is a significant demand for temperature measurement in various scenarios and devices. Contact temperature measurement, using temperature sensors such as platinum resistance thermometers or thermocouples as sensing elements, directly measures the temperature of the measured location. This is the most traditional, yet also the most reliable, accurate, and easily implemented temperature measurement method. A common contact temperature measurement method involves placing a contact temperature sensor at the measured location. Changes in temperature cause changes in the sensor's electrical parameters (thermoelectric potential, resistance, etc.). The sensor is connected to an electrical measurement module / instrument via leads, and the sensor's electrical parameters are measured. By comparing these measurements with the calibration equations, the temperature of the measured location can be obtained.

[0003] However, the need for leads and electrical measurement modules / instruments limits the application of contact temperature measurement methods in many special scenarios. For example, measuring the surfaces of enclosed equipment (such as large autoclaves), confined spaces in special equipment, or rotating parts (such as various engines and wind turbine rotors) presents challenges due to the lack of external output interfaces, wiring difficulties, and the risk of tangling during rotation, making wired temperature sensors inconvenient. To address this, the rapidly developing wireless temperature measurement technology, through its built-in miniature electrical measurement module and wireless transmission module, transmits the sensor's electrical parameters to an external receiver in real time, avoiding the wiring difficulties associated with traditional leads. However, since the electrical measurement and wireless transmission modules require power (usually batteries), the operating temperature of wireless temperature sensors is generally limited (below 150°C). Limiting the upper limit of the measurement temperature ensures the safety of the battery and circuit module. Therefore, existing methods are insufficient to meet the higher temperature measurement requirements in the aforementioned scenarios. Summary of the Invention

[0004] To address the aforementioned problems, this invention discloses a novel high-temperature resistant wireless passive temperature measurement device, comprising a passive power supply module based on the thermoelectric effect, a heat insulation device based on a high-heat-capacity phase change material, an ultra-low power temperature measurement and wireless transmission module, an adsorption auxiliary module based on magnetic attraction or high-temperature adhesive, and a wireless signal receiving module. This invention solves the problems of poor safety of actively powered batteries, short battery life, and high-temperature intolerance of circuits such as the temperature measurement and wireless transmission modules under high-temperature conditions, providing a wireless passive principle solution for special temperature measurement scenarios.

[0005] This invention discloses a novel high-temperature resistant wireless passive temperature measurement device. The device includes: a passive power supply module, a heat insulation device, an ultra-low power temperature measurement and wireless transmission module, an adsorption auxiliary module, and a wireless signal receiving module. The passive power supply module is connected to the ultra-low power temperature measurement and wireless transmission module. The hot end is disposed on the surface of the heat insulation device, and the cold end is disposed within the phase change material of the heat insulation device. The temperature sensor of the ultra-low power temperature measurement and wireless transmission module is disposed on the surface of the heat insulation device, and the remaining electrical measurement components are placed inside the heat insulation device. The adsorption auxiliary module is disposed on the surface of the heat insulation device. The wireless signal receiving module is located outside the measured area and is used to receive wireless signals.

[0006] The passive power supply module is made of a material with a high thermoelectric coefficient. The hot end is located on the outer surface of the temperature measuring device and contacts the high-temperature area being measured, while the cold end contacts the phase change material in the heat insulation device.

[0007] The heat insulation device uses a high heat capacity phase change material inside and includes two parts: a box and a cover. The cover contains the high heat capacity phase change material.

[0008] The ultra-low power temperature measurement and wireless transmission module comprises three parts: an ultra-thin temperature sensor embedded in the center of the hot end of the passive power supply module; an ultra-low power electrical measurement module for measuring the electrical parameters of the temperature sensor; and an ultra-low power wireless transmission module for transmitting the measurement results to the outside world.

[0009] The adsorption auxiliary module is made of magnetic absorbing sheet or high-temperature adhesive, and forms a concentric embedded structure with the temperature sensor of the passive power supply module, the ultra-low power temperature measurement and wireless transmission module.

[0010] When the device performs high-temperature testing: the adsorption auxiliary module, made of magnetic attraction or high-temperature adhesive, tightly attaches the temperature measuring device to the surface being tested; the hot end of the passive power supply module and the temperature sensor simultaneously contact the high-temperature location being tested; the temperature difference generated between the hot and cold ends of the passive power supply module provides power to the ultra-low power temperature measuring and wireless transmission module; the electrical parameters of the temperature sensor are measured by the electrical measurement module and transmitted to the external receiving end via the wireless transmission module, realizing a passive power supply, high-temperature tolerance, and real-time online measurement process.

[0011] In summary, this invention addresses the problem of high-temperature measurement in special scenarios where active wired methods and means cannot be used, and discloses a novel high-temperature resistant wireless passive temperature measurement device that can meet the high-temperature measurement needs in special scenarios. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Fig. 1 This is a schematic diagram of a novel high-temperature resistant wireless passive temperature measurement device according to an embodiment of the present invention.

[0014] Fig. 2 This is a schematic diagram of a concentric embedded structure consisting of a passive power supply module, an ultra-low power temperature measurement and wireless transmission module, a temperature sensor, and an adsorption auxiliary module in a novel high-temperature resistant wireless passive temperature measurement device according to an embodiment of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] This invention discloses a novel high-temperature resistant wireless passive temperature measurement device, suitable for scenarios where the measured temperature is high, active power supply using batteries is not possible, and it is inconvenient to use wired temperature sensors for temperature measurement.

[0017] The aforementioned device includes a passive power supply module, a heat insulation device, an ultra-low power temperature measurement and wireless transmission module, an adsorption auxiliary module, and a wireless signal receiving module. In use, the adsorption auxiliary module, made of magnetic attraction or high-temperature adhesive, tightly adheres the temperature measurement device to the surface being measured. The hot end of the passive power supply module and the temperature sensor simultaneously contact the high-temperature location being measured. The temperature difference between the hot and cold ends of the passive power supply module provides power to the ultra-low power temperature measurement and wireless transmission module. The electrical parameters (resistance, voltage, etc.) of the temperature sensor are measured by the electrical measurement module and transmitted to an external receiver via the wireless transmission module, enabling real-time online measurement.

[0018] This invention solves the problems of poor safety, short battery life, and high temperature intolerance of circuits such as temperature measurement and wireless transmission modules in active power supply under high temperature conditions, and provides a wireless passive principle solution for special temperature measurement scenarios.

[0019] Example 1: like Figs. 1-2As shown (1 is the insulation device housing filled with high heat capacity phase change material, 2 is the wire, 3 is the electrical measurement part and wireless transmission module of the ultra-low power temperature measurement module, 4 is the hot end of the passive power supply module, 5 is the temperature sensor wire of the ultra-low power temperature measurement module, 6 is the temperature sensor of the ultra-low power temperature measurement module, 7 is the cold end of the passive power supply module, 8 is the insulation device cover filled with high heat capacity phase change material, 9 is the adsorption auxiliary module, and 10 is the wireless signal receiving module), a novel high-temperature resistant wireless passive temperature measurement device includes: a passive power supply module, an insulation device, and an ultra-low power phase change material housing. The system comprises a low-power temperature measurement and wireless transmission module, an adsorption auxiliary module, and a wireless signal receiving module; wherein: the passive power supply module is connected to the ultra-low power temperature measurement and wireless transmission module; the hot end is disposed on the surface of the heat insulation device, and the cold end is disposed within the phase change material of the heat insulation device; the temperature sensor of the ultra-low power temperature measurement and wireless transmission module is disposed on the surface of the heat insulation device, and the remaining electrical measurement components are placed inside the heat insulation device; the adsorption auxiliary module is disposed on the surface of the heat insulation device; and the wireless signal receiving module is located outside the measured area and is used to receive wireless signals.

[0020] The passive power supply module is made of a material with a high thermoelectric coefficient. The hot end is located on the outer surface of the temperature measuring device and contacts the high-temperature area being measured, while the cold end contacts the phase change material in the heat insulation device.

[0021] The heat insulation device uses a high heat capacity phase change material inside and includes two parts: a box and a cover. The cover contains the high heat capacity phase change material.

[0022] The ultra-low power temperature measurement and wireless transmission module comprises three parts: an ultra-thin temperature sensor embedded in the center of the hot end of the passive power supply module; an ultra-low power electrical measurement module for measuring the electrical parameters of the temperature sensor; and an ultra-low power wireless transmission module for transmitting the measurement results to the outside world.

[0023] The adsorption auxiliary module is made of magnetic absorbing sheet or high-temperature adhesive, and forms a concentric embedded structure with the temperature sensor of the passive power supply module, the ultra-low power temperature measurement and wireless transmission module.

[0024] When the device performs high-temperature testing: the adsorption auxiliary module, made of magnetic attraction or high-temperature adhesive, tightly attaches the temperature measuring device to the surface being tested; the hot end of the passive power supply module and the temperature sensor simultaneously contact the high-temperature location being tested; the temperature difference generated between the hot and cold ends of the passive power supply module provides power to the ultra-low power temperature measuring and wireless transmission module; the electrical parameters of the temperature sensor are measured by the electrical measurement module and transmitted to the external receiving end via the wireless transmission module, realizing a passive power supply, high-temperature tolerance, and real-time online measurement process.

[0025] Example 2: A novel high-temperature resistant wireless passive temperature measurement device comprises a passive power supply module, a heat insulation device, an ultra-low power temperature measurement and wireless transmission module, an adsorption auxiliary module, and a wireless signal receiving module. The passive power supply module is connected to the ultra-low power temperature measurement and wireless transmission module; its hot end is located on the surface of the heat insulation device, and its cold end is located within the phase change material of the heat insulation device, providing power to the relevant circuitry. The temperature sensor of the ultra-low power temperature measurement and wireless transmission module is located on the surface of the heat insulation device to sense the measured temperature; the remaining electrical components are placed inside the heat insulation device to prevent excessively high temperatures from adversely affecting the circuitry. The adsorption auxiliary module, made of magnetic elements or high-temperature adhesive, is located on the surface of the heat insulation device to ensure tight adhesion between the temperature measurement device and the measured surface. The wireless signal receiving module is located outside the measured area and is used to receive wireless signals.

[0026] The working process is as follows: During high-temperature testing, the temperature measuring device is tightly attached to the surface being tested using an adsorption auxiliary module made of magnetic or high-temperature adhesive. The hot end of the passive power supply module and the temperature sensor simultaneously contact the high-temperature location being tested. The temperature difference generated between the hot and cold ends of the passive power supply module provides power to the ultra-low power temperature measuring and wireless transmission module. The electrical parameters (resistance, voltage, etc.) of the temperature sensor are measured by the electrical measurement module and transmitted to the external receiving end via the wireless transmission module, realizing the device's functions of passive power supply, high-temperature tolerance, and real-time online measurement.

[0027] Example 3: Taking the measurement of the internal temperature of a high-temperature autoclave (with an observation window allowing wireless signals to penetrate) at 300℃ as an example, the passive power supply module is made of Bi-Te material, the temperature sensor uses an ultra-thin PT100, and the heat insulation module shell is made of aluminum, filled with a potassium nitrate-sodium nitrate mixed salt (a high heat capacity phase change material). The size of this heat insulation box structure can be adjusted according to actual usage requirements; a larger box contains more phase change material and can withstand high temperatures for a longer time. Assuming it can withstand 300℃ for 2 hours, the ultra-low power temperature measurement module and the wireless transmission module are placed inside the heat insulation device. During testing, the aforementioned wireless passive temperature measurement device is deployed inside the autoclave. Multiple devices can be deployed as needed to measure the temperature at different locations. After deployment, the autoclave is closed, the temperature is raised to the required level and maintained. Upon sensing the high temperature, the passive power supply module generates electricity by creating a temperature difference between the hot and cold ends, driving the ultra-low power temperature measurement module and the wireless transmission module to transmit the real-time resistance value of the PT100. After receiving the signal, the external wireless signal receiving module compares the resistance value of the PT100 temperature sensor with the temperature calibration data to calculate the real-time temperature value. The measurement time is strictly controlled within 2 hours (including heating and cooling time). After measurement, the temperature measuring device should be quickly removed to a normal temperature environment. Simultaneously, the cover should be opened, and the internal ultra-low power temperature measuring module and wireless transmitting module should be removed and placed away. The heat insulation device can only be reused after standing in a normal temperature environment for 24 hours.

[0028] Please note that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A novel high-temperature resistant wireless passive temperature measurement device, characterized in that, The device includes: a passive power supply module, a heat insulation device, an ultra-low power temperature measurement and wireless transmission module, an adsorption auxiliary module, and a wireless signal receiving module; wherein: The passive power supply module is connected to the ultra-low power temperature measurement and wireless transmission module. The hot end is located on the surface of the insulation device, and the cold end is located within the phase change material of the insulation device. The temperature sensor of the ultra-low power temperature measurement and wireless transmission module is arranged on the surface of the heat insulation device, and the remaining electrical measurement components are placed inside the heat insulation device. The adsorption auxiliary module is arranged on the surface of the heat insulation device; The wireless signal receiving module is located outside the area being tested and is used to receive wireless signals.

2. The novel high-temperature resistant wireless passive temperature measuring device according to claim 1, characterized in that, The passive power supply module is made of a material with a high thermoelectric coefficient. The hot end is located on the outer surface of the temperature measuring device and contacts the high-temperature area being measured, while the cold end contacts the phase change material in the heat insulation device.

3. The novel high-temperature resistant wireless passive temperature measuring device according to claim 2, characterized in that, The heat insulation device uses a high heat capacity phase change material inside and includes two parts: a box and a cover. The cover contains the high heat capacity phase change material.

4. A novel high-temperature resistant wireless passive temperature measuring device according to claim 3, characterized in that, The ultra-low power temperature measurement and wireless transmission module comprises three parts: An ultra-thin temperature sensor is embedded in the center of the hot end of the passive power supply module; Ultra-low power electrical measurement module for measuring the electrical parameters of temperature sensors; An ultra-low power wireless transmission module is used to transmit measurement results to external systems.

5. A novel high-temperature resistant wireless passive temperature measuring device according to claim 4, characterized in that, The adsorption auxiliary module is made of magnetic absorbing sheet or high-temperature adhesive, and forms a concentric embedded structure with the temperature sensor of the passive power supply module, the ultra-low power temperature measurement and wireless transmission module.

6. A novel high-temperature resistant wireless passive temperature measuring device according to claim 5, characterized in that, When the device is subjected to high-temperature testing: The adsorption auxiliary module, made of magnetic attraction or high-temperature adhesive, tightly attaches the temperature measuring device to the surface being measured. When the hot end of the passive power supply module and the temperature sensor are in contact with the high-temperature location being measured, the temperature difference generated between the hot and cold ends of the passive power supply module provides power to the ultra-low power temperature measurement and wireless transmission module. The electrical parameters of the temperature sensor are measured by the electrical measurement module and transmitted to the external receiver via the wireless transmission module, realizing a passive power supply, high temperature resistance, and real-time online measurement process.

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