High-performance temperature sensor

Abstract

The utility model relates to a high-performance temperature sensor. Comprising a signal transmission pipeline, a signal acquisition structure 2, a signal transmission structure, a protective cover plate structure and a combined module, wherein the signal acquisition structure comprises an RTD (Resistance Temperature Detector), a thermistor and a thermocouple; the RTD detects the temperature by measuring the characteristic that the resistor changes along with the temperature, and has high precision and stability. The thermistor is based on the principle that the resistance changes along with the temperature, and is usually used in a lower temperature range. The thermocouple measures the temperature through the voltage difference generated between different metal contacts, and is suitable for a wider temperature range. And the part of the signal transmission pipeline is fixedly connected with the signal acquisition structure and is used for transmitting a signal from the interior of the sensor to an external system. Transmission media such as a cable or a wire are arranged inside and used for converting temperature changes into electric signals to be output.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature sensor technical field, concretely is a kind of high-performance temperature sensor. BACKGROUND

[0002] Temperature sensor is a kind of equipment for measuring temperature, is widely used in industry, medical treatment, car, household appliance, electronic equipment and so on field.It is converted into electric signal (usually voltage or current signal) by detecting temperature change, so that the monitoring and control of temperature are realized.

[0003] Many temperature sensors, in the signal transmission process, due to the resistance of wire, current interference, poor contact or signal attenuation, lead to the temperature signal of acquisition to exist error.Especially in low current or high-precision application scene, error is more obvious.This error will lead to inaccurate temperature measurement, and then influence the control and monitoring precision of system, especially in high-precision application (such as precision instrument, industrial automation etc.), error cannot be ignored to final result. UTILITY MODEL CONTENT

[0004] Utility model aims at providing a kind of high-performance temperature sensor, solves the problem proposed above.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of high-performance temperature sensor, including: the signal acquisition structure that is internally provided with RTD, thermistor and thermocouple, with the signal transmission channel fixed with the signal acquisition structure, located at the one end of the signal transmission structure principle signal acquisition structure, the signal transmission structure that is internally formed with cavity, with the protective cover structure of the signal transmission structure sealing connection, the signal transmission structure is protected, located in the signal transmission structure interior, to carry out signal processing combination module.

[0007] High-performance temperature sensor can be widely used in industrial automation, process control, environmental monitoring, medical equipment and so on field, especially in the occasion needing high precision, stability and diversified measurement range.

[0008] According to an aspect of the embodiment of the application, the connecting place of the signal acquisition structure and the signal transmission channel is provided with reinforcing peg sleeve.

[0009] The main role of the reinforcing sleeve in the temperature sensor is to improve the stability and strength of the connection between the signal acquisition structure and the signal transmission channel. It enhances the mechanical strength of the connection part to prevent loosening, leakage and damage, thereby ensuring the stable and accurate operation of the temperature sensor in complex and harsh working environments. In addition, the reinforcing sleeve can also improve the overall protection performance and installation reliability of the sensor, ensuring the long-term stability and high-precision output of the sensor.

[0010] According to an aspect of an embodiment of the present application, the signal transmission structure includes: a signal amplification module for amplifying the electrical signal after acquisition, a signal filtering module for removing low-frequency noise or power supply noise in the electrical signal, a signal output module for outputting the processed electrical signal, and a sealing gasket arranged at the connection between the protective cover plate structure to ensure the sealing performance.

[0011] According to an aspect of an embodiment of the present application, the protective cover plate structure includes: a cover plate with an arc-shaped outer surface covering the outside of the signal transmission structure, a detection connection port arranged at the middle position of the outer side of the cover plate for detecting signal input, and a sealing ring connected with the signal transmission structure through threads and in contact with the sealing gasket.

[0012] The signal transmission structure provides necessary physical protection and sealing, ensuring the stable operation of the sensor device in various complex environments and avoiding external interference. Its design plays an important role in improving the impact resistance, durability, sealing and maintainability of the device.

[0013] According to an aspect of an embodiment of the present application, the combination module includes: a digital-to-analog converter for receiving the electrical signal processed by the signal amplification module and the signal output module, a calibration connection port providing a connection position with an external temperature source signal, a plurality of wire connection ports, a controller located at the center position inside the signal transmission structure, a wireless signal port for wireless signal transmission, and a plurality of wire ports arranged at equal angles in the axial direction.

[0014] According to an aspect of an embodiment of the present application, the digital-to-analog converter converts the signal into a digital signal, and the digital-to-analog converter and the wire are connected by Kelvin connection method.

[0015] The Kelvin connection method is used for the connection between the digital-to-analog converter and the wire, which can minimize the error caused by the wire resistance and ensure the high-precision conversion of the digital signal. This connection method is especially suitable for applications that require precise measurement and signal conversion, such as high-precision measuring instruments and sensor devices, which can improve the reliability and accuracy of the system.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] The number of digital converters is connected with the wire through the Kelvin connection method, the influence of the wire resistance on the signal is eliminated by separating the current lead and the voltage measurement lead, and the accuracy of signal transmission is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a perspective view of the high-performance temperature sensor.

[0019] Fig. 2 It is a structural schematic view of the high-performance temperature sensor.

[0020] Fig. 3 It is a structural schematic view of the combined module.

[0021] In the figure: signal conveying pipeline 1, signal acquisition structure 2, signal transmission structure 3, protective cover plate structure 4, combined module 5, signal amplification module 31, signal output module 32, signal filtering module 33, sealing washer 34, cover plate 41, detection connection port 42, sealing ring 43, digital-to-analog converter 51, calibration connection port 52, wire connection port 53, controller 54, wireless signal port 55. DETAILED DESCRIPTION

[0022] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features known in the art are not described in order not to obscure the present application.

[0023] The high-performance temperature sensor disclosed by the present application has the advantages that Figs. 1 to 3As shown, it includes: signal transmission pipeline 1, signal acquisition structure 2, signal transmission structure 3, protective cover plate 41 structure 4 and combination module 5, signal acquisition structure 2 includes RTD (resistance temperature detector), thermistor, thermocouple. RTD detects temperature by measuring the resistance change with temperature, with high precision and stability. Thermistor is based on the principle of resistance change with temperature, commonly used in lower temperature range. Thermocouple measures temperature by the voltage difference generated between different metal contacts, suitable for a wider temperature range. Signal transmission pipeline 1 is fixedly connected with signal acquisition structure 2, used to transmit signals from the inside of the sensor to the outside system. Internal cable or wire transmission medium is used to convert temperature change into electrical signal output. Signal transmission structure 3 is internally provided with a cavity, which is to protect the internal sensing elements and also helps to enhance the anti-interference ability of the sensor, ensuring stable transmission of signals. Protective cover plate 41 structure 4 is to physically protect signal transmission structure 3 from external environmental interference or damage. Dustproof, waterproof, corrosion-resistant, etc. High-strength, temperature-resistant, corrosion-resistant materials such as stainless steel, aluminum alloy, etc. are used. Combination module 5 processes signals.

[0024] In actual use, the sensing elements (RTD, thermistor, thermocouple) perceive the change of the ambient temperature and convert it into an electrical signal. The signal is transmitted through the signal transmission channel to the signal processing module. The signal processing module processes the collected signal. The processed signal can be output in digital or analog form for use by other devices or control systems.

[0025] In the above embodiment, further, a reinforcing sleeve is provided at the connection between the signal acquisition structure 2 and the signal transmission channel. The connection often bears a large tensile force, compression force or torsional force, especially under vibration or external force. The reinforcing sleeve can ensure the stable connection of the signal acquisition structure 2 and the signal transmission channel, avoiding poor contact or damage due to external force or mechanical pressure. The connection between the signal acquisition structure 2 and the signal transmission channel needs to maintain long-term stability. Using a reinforcing sleeve can effectively prevent the connection from loosening due to long-term use, thermal expansion or cold contraction, thereby reducing the risk of signal loss or transmission errors. For temperature sensors, the working environment is often harsh. The reinforcing sleeve not only enhances the mechanical strength, but also increases the protection performance, avoiding the influence of external pollution (such as water, dust, corrosive substances, etc.) on the signal transmission part, improving the durability of the sensor. During installation, the reinforcing sleeve can provide stronger fixation, reducing the connection problems caused by human installation errors or improper installation.

[0026] The signal transmission structure 3 includes a signal amplification module 31, a signal output module 32, a signal filtering module 33, and a sealing gasket 34. The signal amplification module 31 amplifies the weak electrical signal collected from the sensor (such as RTD, thermistor, or thermocouple) for subsequent processing and analysis. Because the electrical signal output by the sensor is usually weak and may be disturbed by external interference, the amplification module can enhance the signal strength and improve the clarity of the signal. According to the output characteristics of different types of sensors, the amplification factor of the signal amplification module 31 needs to be accurately designed to avoid signal distortion caused by excessive amplification. The amplification module should have high precision and good linearity to ensure that the amplified signal maintains an accurate correspondence with the actual temperature. The signal filtering module 33 is used to remove low-frequency noise or power supply noise from the electrical signal. The sensor signal may be disturbed by external environmental interference, especially power supply noise (such as electromagnetic interference EMI, power supply fluctuations, etc.) and low-frequency noise (such as thermal noise, mechanical vibration noise, etc.). The filtering module can selectively remove these noises by designing a filter to retain the useful signal part. The signal output module 32 outputs the amplified and filtered electrical signal to external devices or control systems. The output signal is an analog signal (such as voltage or current signal), or a digital signal (such as data output through I2C, SPI, RS-485, etc.), and the sealing gasket 34 is located at the connection between the signal transmission structure 3 and the protective cover plate 41 structure 4, mainly used to ensure the sealing of the sensor to prevent water, dust, corrosive gases or liquids from entering the signal transmission structure. This function is very critical, especially in industrial environments where sensors need to face harsh external conditions.

[0027] In actual use, the filtering module needs to remove only the noise that is not useful for signal processing, and retain the effective signal. Usually, the filtering module needs to be designed with appropriate cut-off frequency. The filtering method includes low-pass filtering, high-pass filtering, or band-pass filtering, and the specific filtering method depends on the characteristics of the signal and the nature of the noise source. Common filters include analog filters and digital filters, and the selection needs to consider the response speed, power consumption, and accuracy requirements of the system

[0028] The protective cover plate 41 structure 4 includes: cover plate 41, detection connection port 42 and sealing ring 43, the main function of cover plate 41 is to provide physical protection, prevent dust, moisture, chemicals, mechanical impact and other external environment from damaging signal transmission structure 3. The external cover plate 41 can prevent physical interference and ensure the stability and long-term reliability of the signal transmission structure in harsh environments. The outer surface of the cover plate 41 is designed as a curved surface, which has the advantages of effectively dispersing external pressure and reducing local stress concentration. Especially when the device is subjected to external force impact, the curved surface can disperse the force, thereby enhancing its impact and pressure resistance. The arc design can also provide better visual and structural design, especially suitable for the external structural requirements of modern and precise equipment. The detection connection port 42 is opened in the middle of the outer side of the cover plate 41, which is used for signal input or output, ensuring that external devices can be connected to the signal transmission structure for signal reading or monitoring. The port provides an interface between the sensor and the external control system or monitoring device, ensuring that the signal can be transmitted from the sensor to the external device for further processing, display or recording. The interface type of the port (such as M12, RJ45, BNC, DB9, etc.) needs to be compatible with the interface of the external device to facilitate data transmission. The cover plate 41 is connected to the signal transmission pipe 1 through the sealing ring 43, and the threaded connection is a very common and reliable mechanical connection method. It can ensure that the cover plate 41 and the transmission module are firmly and stably fixed, preventing loosening or falling during work. Threaded connection provides strong mechanical support, which can ensure the sealing and stability of the cover plate 41 during long-term use.

[0029] The combination module 5 includes: digital-to-analog converter 51, calibration connection port 52, wire connection port 53, controller 54 and wireless signal port 55, digital-to-analog converter 51 is responsible for converting the electrical signal processed by the amplification module and signal output module 32 into an analog signal. Digital-to-analog converter 51 is usually used for conversion between digital and analog signals, which can ensure that the signal can be further processed or utilized by other systems. The calibration connection port 52 provides a port for connecting to an external temperature source signal for calibration of the device. This is usually to ensure that the system can accurately read or respond to external environmental changes, such as temperature signals. The wire connection port 53 is arranged at equal angles in the axial direction and can be used to connect multiple wires of external devices or sensors. The controller 54 is located in the center of the signal transmission structure 3 and is responsible for coordinating the work of each module and may process input signals, perform calculations, or send output commands. The wireless signal port 55 is used for wireless signal transmission and may be an interface that the module supports wireless communication, such as Wi-Fi, Bluetooth or other wireless communication protocols. This can be used to remotely transmit signals or data to other devices or systems.

[0030] In the above embodiments, further, the digital-to-analog converter 51 (DAC) converts the analog signal to a digital signal while being connected to the wires using the Kelvin connection method. The Kelvin connection method is an electrical connection method used to reduce errors caused by resistance, especially in high-precision measurements. It improves the accuracy of measurements by connecting the current and voltage leads separately to the measurement point, eliminating the voltage drop caused by the resistance of the wires. In the Kelvin connection, the current lead and the voltage measurement lead are separate. The current lead is responsible for transmitting the current through the load, while the voltage measurement lead directly measures the voltage across the load. This method is particularly suitable for low-voltage, low-current, and high-precision applications, such as high-precision voltage or current measurements. The Kelvin connection method effectively reduces the impact of contact resistance and wire resistance on signal conversion, ensuring that the signal does not have errors due to voltage drops caused by resistance during conversion. The digital-to-analog converter 51 usually requires very high signal accuracy, especially in systems with high-frequency or high-precision transmission requirements. Using the Kelvin connection method can avoid additional errors in signal transmission caused by resistance, improving the overall measurement accuracy of the system. If the digital-to-analog converter 51 involves very low signal current or high-precision analog signal conversion, the Kelvin connection method can ensure more accurate transmission of the signal in the wires, avoiding errors caused by current transmission loss or voltage drop.

[0031] In actual use, the workflow is as follows: the sensor receives the signal of the external temperature source and performs preliminary calibration through the calibration port. The external signal is amplified by the amplification module and then transmitted to the digital-to-analog converter 51 through the signal output module 32. The digital-to-analog converter 51 converts the analog signal to a digital signal, using the Kelvin connection method to ensure the accuracy of the signal. The controller 54 receives the digital signal and further processes it. The processed signal is transmitted to external devices for display, analysis, or monitoring through the wireless signal port 55. The signal is electrically connected to other modules or devices through the wire connection port 53. Regular calibration and system self-checking ensure the long-term stability and accuracy of the temperature sensor.

[0032] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims, not by the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A high performance temperature sensor characterized by, The utility model relates to a signal acquisition structure, inside be provided with RTD, thermistor and thermocouple, signal transmission structure, be located signal transmission structure far from signal acquisition structure one end, inside form cavity, protective cover plate structure, with signal transmission structure seal connection, signal transmission structure carry out protection, combination module, be located signal transmission structure inside, to carry out signal processing. The connecting place of the signal acquisition structure and the signal transmission channel is provided with a reinforcing bolt sleeve. The signal transmission structure comprises: Signal amplification module, to gather electric signal and carry out amplification after, Signal filtering module, to remove low-frequency noise or power supply noise in electric signal, Signal output module, to output electric signal after processing, 2. A high performance temperature sensor according to claim 1, wherein Sealing washer, set up with protective cover plate structure junction, to guarantee sealing performance.

3. The high performance temperature sensor of claim 1, wherein, The protective cover plate structure comprises: Cover, cover in signal transmission structure outside, outer surface set as cambered surface, Detection connection port, open in the middle position of cover outer side, to carry out detection signal input, Sealing ring, with signal transmission structure through thread connection, with sealing washer contact. The combination module comprises:

4. The high performance temperature sensor of claim 1, wherein, Digital-analog converter, to receive electric signal after signal amplification module and signal output module processing, Calibration connection port, provide with external temperature source signal connection position, Wire connection port, set up multiple, Controller, located signal transmission structure inside center position, 5. The high performance temperature sensor of claim 1, wherein, Wireless signal port, to carry out wireless signal transmission, Multiple wire port is set up equiangularly in axial direction. The digital-analog converter converts the signal into a digital signal, and the digital-analog converter and the wire are connected by Kelvin connection method. ​ ​ ​ ​ 6. A high performance temperature sensor according to claim 5, wherein ​

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