Pressure sensor

Abstract

The utility model provides a pressure sensor, which is characterized in that a pressure sensing unit is composed of a high-precision strain type or piezoresistive sensor, a temperature sensing unit is composed of a high-temperature-resistant thermocouple or an RTD sensor, and a high-temperature early warning module is composed of a threshold comparator and an alarm mechanism and is arranged in a sensor control unit. A high-precision strain type or piezoresistive sensor is adopted as a pressure sensing unit, the measurement precision is improved, a high-temperature-resistant thermocouple or an RTD sensor is arranged inside to serve as a temperature sensing unit, temperature data are collected and provided, and the temperature is accurately measured through a temperature compensation algorithm of the data processing and control unit. The high-temperature early warning module is composed of a threshold comparator and an alarm mechanism, and temperature data is monitored in real time and compared with a preset safe temperature threshold.

Description

Technical Field

[0001] The utility model provides a sensor, belonging to the technical field of sensors, and particularly relates to a pressure sensor. Background Art

[0002] A pressure sensor is a sensor or instrument that converts input mechanical pressure in a gas or liquid into an electrical output signal. It typically consists of two main components: a pressure-sensitive element capable of measuring, detecting, or monitoring applied pressure, and electronics that convert this information into an electrical output signal.

[0003] Existing pressure sensors typically use low-precision sensing technology, resulting in large measurement errors, and lack effective temperature sensing units and compensation algorithms, making it impossible to maintain measurement accuracy when the temperature changes. At the same time, existing sensors lack dedicated high-temperature warning modules and cannot provide timely warnings and protection in high-temperature environments, which can easily lead to equipment damage or safety accidents. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the embodiments of the present application provide a pressure sensor to solve the problem that the measurement accuracy of the existing pressure sensor is greatly affected by changes in the ambient temperature environment.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a pressure sensor, including a pressure sensing unit, a temperature sensing unit, a data processing and control unit, a high temperature warning module and a power management unit, wherein the pressure sensing unit is composed of a high-precision strain gauge or piezoresistive sensor, the temperature sensing unit is composed of a high-temperature resistant thermocouple or RTD sensor, and the high temperature warning module is composed of a threshold comparator and an alarm mechanism, and is arranged inside the sensor control unit.

[0006] Preferably, the pressure sensing unit is made of corrosion-resistant materials and packaging, including but not limited to ceramic and stainless steel housings.

[0007] Preferably, the temperature sensing unit is provided with a signal processing circuit, including an amplifier, a filter and an analog-to-digital converter, and the signal processing circuit converts the analog signal of the temperature sensor into a digital signal.

[0008] Preferably, the data processing and control unit includes a microcontroller, which has a built-in data analysis and decision-making algorithm. The microcontroller is correspondingly connected to the high temperature warning module.

[0009] Preferably, the high temperature warning module includes a threshold comparator, and the threshold comparator has an internal alarm mechanism.

[0010] Preferably, the power management unit provides a stable power supply, including overvoltage and overcurrent protection circuits.

[0011] Preferably, the signals of the pressure sensing unit and the temperature sensing unit are both connected to a data processing and control unit, and the data processing includes filtering, calibration and error compensation algorithms.

[0012] Preferably, a user interface and a display unit are provided on the housing of the pressure sensing unit, and the user interface and the display unit are connected to a central server via a network or wirelessly.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] This utility model improves the measurement accuracy by adopting high-precision strain gauge or piezoresistive sensor as pressure sensing unit. At the same time, a high-temperature resistant thermocouple or RTD sensor is provided inside as temperature sensing unit to collect and provide temperature data. The temperature compensation algorithm of the data processing and control unit is used to ensure that the measurement results remain highly accurate when the temperature changes. In addition, the high-temperature early warning module is composed of a threshold comparator and an alarm mechanism, and monitors the temperature data in real time and compares it with the preset safety temperature threshold. When it is detected that the temperature exceeds the safety range, the alarm mechanism will be triggered and a warning signal will be issued in time to remind the operator to take corresponding measures, thereby avoiding equipment damage or safety accidents caused by high temperature.

[0015] Other advantages, objectives and features of the present invention will be described in part in the following description and will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional schematic diagram of a pressure sensor of the present utility model;

[0017] Figure 2 This is a structural connection diagram of a pressure sensor of the utility model;

[0018] Figure 3 This is a working diagram of a pressure sensor of the utility model;

[0019] Figure 4 This is a principle diagram of a compensation algorithm for a pressure sensor of the utility model.

[0020] As shown in the figure:

[0021] 1. Pressure sensing unit; 2. Temperature sensing unit; 3. Data processing and control unit; 4. High temperature warning module; 5. Power management unit; 6. User interface and display unit. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are for illustrative purposes only and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] like Figure 1 and Figure 2 As shown, a pressure sensor includes a pressure sensing unit 1, a temperature sensing unit 2, a data processing and control unit 3, a high temperature warning module 4 and a power management unit 5. The pressure sensing unit 1 is made of corrosion-resistant materials and packaging, including but not limited to ceramic and stainless steel shells. The pressure sensing unit 1 is composed of a high-precision strain gauge or piezoresistive sensor, the temperature sensing unit 2 is composed of a high-temperature resistant thermocouple or RTD sensor, and the high temperature warning module 4 is composed of a threshold comparator and an alarm mechanism, and is arranged inside the sensor control unit.

[0026] In this embodiment, by adopting a high-precision strain gauge or piezoresistive sensor as the pressure sensing unit 1, the measurement accuracy is significantly improved, and the problem of large measurement errors caused by the use of low-precision sensing technology in existing sensors is solved; at the same time, a high-temperature resistant thermocouple or RTD sensor is integrated as the temperature sensing unit 2, which can provide accurate temperature data, and implement a temperature compensation algorithm through the data processing and control unit 3 to ensure that the measurement results remain highly accurate when the temperature changes, solving the problem that the existing sensors lack effective temperature sensing units and compensation algorithms and cannot maintain measurement accuracy when the temperature changes; in addition, the utility model specially integrates a high-temperature warning module 4, which is composed of a threshold comparator and an alarm mechanism and is built into the sensor control unit. It monitors temperature data in real time and compares it with a preset safety temperature threshold. When it is detected that the temperature exceeds the safety range, the alarm mechanism will be triggered, and a warning signal will be issued in time to remind the operator to take corresponding measures, thereby avoiding equipment damage or safety accidents caused by high temperature, and making up for the lack of a dedicated high-temperature warning module in existing sensors and the inability to provide timely warning and protection in high temperature environments.

[0027] It should be noted that the housing of the pressure sensor of the present invention can be of any shape in the prior art, and the present invention does not limit the installation position and overall shape of each structure.

[0028] like Figure 3 and Figure 4 As shown, the temperature sensing unit 2 incorporates a signal processing circuit comprising an amplifier, a filter, and an analog-to-digital converter. These components work together to convert the analog signal captured by the temperature sensor into a digital signal for further processing and analysis. The data processing and control unit 3 is the core of the sensor and typically includes a microcontroller with built-in data analysis and decision-making algorithms. The microcontroller is interconnected with the high-temperature warning module 4 to ensure a rapid response when abnormal temperatures are detected.

[0029] The high-temperature warning module 4 includes a threshold comparator with a built-in alarm mechanism that monitors temperature data in real time and compares it with a preset safety temperature threshold. If the temperature exceeds the safety range, the alarm mechanism is triggered, issuing a warning signal to prompt the operator to take appropriate measures to avoid equipment damage or safety accidents caused by high temperatures.

[0030] The power management unit 5 provides a stable power supply, including overvoltage and overcurrent protection circuits, ensuring stable operation of the entire sensor system under various operating conditions. The signals from the pressure sensing unit 1 and the temperature sensing unit 2 are connected to the data processing and control unit 3 through signal processing circuits. This unit performs filtering, calibration, and error compensation algorithms to improve measurement accuracy and reliability.

[0031] The pressure sensing unit 1 is equipped with a user interface and display unit 6, which allows users to directly interact with the sensor and view measurement data and system status. This unit can be connected to a central server via a network or wirelessly, enabling remote monitoring and analysis of data. This is particularly important for industrial applications requiring remote monitoring.

[0032] In this embodiment, the pressure sensor is installed at the location that needs to be monitored, connected to the power supply and initialized through the user interface. The pressure sensing unit 1 and the temperature sensing unit 2 collect pressure and temperature data in real time. The data processing and control unit 3 performs filtering, calibration and error compensation. The high temperature warning module 4 monitors the temperature data in real time and compares it with the preset threshold. Once it exceeds the safety range, the alarm mechanism is triggered. The user views the real-time data and warning information through the display unit 6 and connects to the central server through the network to realize remote monitoring and data recording.

[0033] It should be noted that the temperature compensation algorithm specifically includes:

[0034] Read temperature sensor data: Read the current temperature data from the temperature sensor unit.

[0035] Read pressure sensor data: Read the current pressure data from the pressure sensing unit.

[0036] Apply temperature compensation algorithm: Input the read pressure data and temperature data into the temperature compensation algorithm.

[0037] Search for temperature compensation coefficient: Based on the read temperature value, search for the corresponding compensation coefficient in the preset temperature compensation coefficient table.

[0038] Calculate the compensated pressure value: Use the compensation coefficient found to correct the pressure value and calculate the compensated pressure value.

[0039] Output the compensated pressure value: Output the calculated compensated pressure value for subsequent processing and display. This involves multiple steps, including finding the temperature compensation coefficient. The temperature compensation coefficient table stores the corresponding compensation coefficients for different temperature ranges. Based on the read temperature value, the corresponding compensation coefficient is found. Calculate the compensated pressure value: Use the found compensation coefficient to correct the original pressure value. The formula can be:

[0040] P Compensation = P Original * K Compensation, where P Compensation is the compensated pressure value, P Original is the original pressure value, and K Compensation is the compensation coefficient found in the coefficient table.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A pressure sensor, characterized in that: The pressure sensor comprises a pressure sensing unit (1), a temperature sensing unit (2), a data processing and control unit (3), a high temperature warning module (4) and a power management unit (5); the pressure sensing unit (1) is composed of a high-precision strain gauge or piezoresistive sensor; the temperature sensing unit (2) is composed of a high-temperature resistant thermocouple or RTD sensor; and the high temperature warning module (4) is composed of a threshold comparator and an alarm mechanism, and is arranged inside the sensor control unit.

2. A pressure sensor according to claim 1, characterized in that: The pressure sensing unit (1) is made of corrosion-resistant materials and packaging, including but not limited to ceramic and stainless steel housings.

3. The pressure sensor according to claim 1, wherein: The temperature sensing unit (2) is internally provided with a signal processing circuit comprising an amplifier, a filter and an analog-to-digital converter, and the signal processing circuit converts the analog signal of the temperature sensor into a digital signal.

4. The pressure sensor according to claim 1, wherein: The data processing and control unit (3) comprises a microcontroller having a built-in data analysis and decision-making algorithm. The microcontroller is correspondingly connected to the high temperature warning module (4).

5. The pressure sensor according to claim 1, wherein: The high temperature warning module (4) comprises a threshold comparator, and the threshold comparator is provided with an alarm mechanism.

6. The pressure sensor according to claim 1, wherein: The power management unit (5) provides a stable power supply and includes overvoltage and overcurrent protection circuits.

7. The pressure sensor according to claim 1, characterized in that: The signals of the pressure sensing unit (1) and the temperature sensing unit (2) are both connected to a data processing and control unit (3), and the data processing includes filtering, calibration and error compensation algorithms.

8. The pressure sensor according to claim 2, wherein: A user interface and a display unit (6) are provided on the housing of the pressure sensing unit (1), and the user interface and the display unit (6) are connected to a central server via a network or wirelessly.

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