Intelligent gas pressure and differential pressure sensor
By using a modular design for intelligent gas pressure and differential pressure sensors, the error problem of traditional sensors in measuring minute pressures is solved, achieving high-precision and high-stability gas pressure and differential pressure measurement, thus enhancing the reliability and intelligence level of the equipment.
Patent Information
- Application Number
- CN202520630553.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-07
AI Technical Summary
Traditional pressure sensors have significant errors when measuring minute pressures and differential pressures, failing to meet the requirements for high-precision measurement, especially in process control in industries such as petroleum, chemical, and metallurgy.
It employs an intelligent gas pressure and differential pressure sensor, which includes a micro pressure-sensitive chip, a temperature compensation module, a linear compensation module, a signal amplification module, a voltage-to-current conversion module, a reverse polarity protection module, a pressure overload current limiting module, a communication module, and a self-calibration module. Through the combination of these modules, it achieves high-sensitivity and low-power pressure signal detection, eliminates ambient temperature changes and nonlinear errors, amplifies the signal and improves anti-interference capabilities, and supports remote monitoring and automatic calibration.
It achieves high-precision and high-stability gas pressure and differential pressure measurement, eliminates the influence of ambient temperature changes and nonlinear errors, improves the signal-to-noise ratio, enhances the reliability and intelligence of the equipment, and supports long-distance transmission and remote monitoring.
Smart Images
Figure CN223925907U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sensor technology, specifically an intelligent gas pressure and differential pressure sensor. Background Technology
[0002] A sensor is a detection device that can sense the measured information and transform it into an electrical signal or other required form of information output according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, recording and control. The existence and development of sensors have given objects senses such as touch, taste and smell, making them come alive. Sensors are an extension of human senses. Sensors are characterized by miniaturization, digitization, intelligence, multifunctionality, systematization and networking. They are the primary link in realizing automatic detection and automatic control. A sensor generally consists of four parts: a sensitive element, a conversion element, a conversion circuit and an auxiliary power supply. The sensitive element directly senses the measured quantity and outputs a physical quantity signal that has a definite relationship with the measured quantity. The conversion element converts the physical quantity signal output by the sensitive element into an electrical signal. The conversion circuit is responsible for amplifying and modulating the electrical signal output by the conversion element. The conversion element and the conversion circuit generally require an auxiliary power supply.
[0003] In industrial production processes, accurate measurement of gas pressure and differential pressure is crucial for ensuring production safety, improving product quality, and optimizing process flows. With the continuous improvement of industrial automation and intelligence, the performance requirements for pressure sensors are also increasing. Traditional pressure sensors often have large errors when measuring minute pressures and differential pressures, failing to meet the needs of high-precision measurement. This is especially true in industries such as petroleum, chemical, and metallurgy, where accurate measurement of minute pressures is critical for process control. Therefore, we provide an intelligent gas pressure and differential pressure sensor to solve these problems. Utility Model Content
[0004] The purpose of this invention is to provide an intelligent gas pressure and differential pressure sensor to solve the problems mentioned in the background section and overcome its technical defects.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an intelligent gas pressure and differential pressure sensor, including a fixed plate and a micro pressure-sensitive chip. A connecting cylinder is fixedly connected to the left side of the fixed plate, and a first hexagonal sleeve is fixedly connected to the right side of the fixed plate. A housing is threadedly connected to the inner ring of the first hexagonal sleeve, and a second hexagonal sleeve is threadedly connected to the outer surface of the right end of the housing. A probe is threadedly connected to the inner ring of the second hexagonal sleeve. Multiple sets of annularly arranged sensing heads are fixedly installed on the inner sidewall of the probe. A sealing cap is fixedly connected to the right side of the probe. The connecting cylinder... Internally, there are two data lines. The micro pressure-sensitive chip is electrically connected to a temperature compensation module via a wire. The temperature compensation module is electrically connected to a linear compensation module via a wire. The linear compensation module is electrically connected to a signal amplification module via a wire. The signal amplification module is electrically connected to a voltage-to-current conversion module via a wire. The voltage-to-current conversion module is electrically connected to a reverse polarity protection module via a wire. The reverse polarity protection module is electrically connected to a pressure overload current limiting module via a wire. The pressure overload current limiting module is electrically connected to a communication module via a wire. The communication module is electrically connected to a self-calibration module via a wire.
[0006] As a further improvement of this utility model: two sets of positioning blocks are fixedly connected to the right side of the fixing plate, and the ends of the two sets of positioning blocks that are close to each other are in contact with the outer surface of the shell, and the shell is made of stainless steel.
[0007] As a further improvement of this utility model: a limiting ring is fixedly connected to the outer surface of the shell, and the limiting ring is in contact with the positioning block.
[0008] As a further improvement of this invention: the outer surface of the probe is fixedly connected with a blocking ring, and the number of blocking rings is at least four.
[0009] As a further improvement of this utility model: a reinforcing ring is fixedly connected to the left side of the fixing plate, and the inner ring of the reinforcing ring is fixedly connected to the outer surface of the connecting cylinder.
[0010] As a further improvement of this utility model, a protective pad is fixedly connected to the left side of the fixing plate, and the protective pad is made of rubber.
[0011] As a further embodiment of this utility model: a fastener is fixedly connected to the outer surface of the data cable, and a connecting block is fixedly connected to the right end of the fastener. The outer surface of the connecting block is fixedly connected to the inner wall of the connecting cylinder, and the connecting block is fixedly connected to the data cable.
[0012] As a further improvement of this utility model: two sets of mounting holes are provided on the right side of the fixing plate, and the inner ring of each mounting hole is threaded.
[0013] Compared with existing technologies, the beneficial effects of this utility model include: The micro pressure-sensitive chip enables high-sensitivity and low-power pressure signal detection, accurately measuring minute gas pressures and differential pressures. The combination of temperature compensation and linear compensation modules effectively eliminates the influence of environmental temperature changes and nonlinear errors on measurement results, ensuring high-precision measurement in various environments. The signal amplification module amplifies weak electrical signals to the industrial standard output range, improving the signal-to-noise ratio. The voltage-to-current conversion module converts voltage signals into highly interference-resistant current signals, facilitating long-distance transmission. The reverse polarity protection module and pressure overload current limiting module prevent equipment damage caused by reverse power connection and pressure overload, improving system reliability. The communication module and self-calibration module support remote monitoring and automatic calibration functions, further enhancing the sensor's intelligence and measurement accuracy. Attached Figure Description
[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:
[0015] Figure 1 The schematic diagram shows a three-dimensional structure of a fixing plate according to one embodiment of the present invention;
[0016] Figure 2 The schematic diagram shows a side view of the fixing plate according to one embodiment of the present invention.
[0017] Figure 3 The schematic diagram shows a cross-sectional view of the connecting cylinder according to one embodiment of the present invention;
[0018] Figure 4 The schematic diagram shows a side view of the first hexagonal sleeve according to one embodiment of the present invention;
[0019] Figure 5 The schematic diagram shows a system structure diagram of the sensor according to one embodiment of the present invention;
[0020] The following components are labeled in the diagram: 1. Fixing plate; 2. Connecting cylinder; 3. First hexagonal sleeve; 4. Outer shell; 5. Positioning block; 6. Limiting ring; 7. Second hexagonal sleeve; 8. Probe; 9. Blocking ring; 10. Sensing head; 11. Sealing cap; 12. Reinforcing ring; 13. Protective pad; 14. Data cable; 15. Fastener; 16. Mounting hole; 17. Connecting block; 18. Micro pressure-sensitive chip; 19. Temperature compensation module; 20. Linear compensation module; 21. Signal amplification module; 22. Voltage-current conversion module; 23. Reverse polarity protection module; 24. Pressure overload current limiting module; 25. Communication module; 26. Self-calibration module. Detailed Implementation
[0021] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.
[0022] According to one embodiment of the present invention, in conjunction with the accompanying drawings, Figures 1-5 .
[0023] A smart gas pressure and differential pressure sensor includes a fixed plate 1 and a micro pressure-sensitive chip 18. A connecting cylinder 2 is fixedly connected to the left side of the fixed plate 1, and a first hexagonal sleeve 3 is fixedly connected to the right side of the fixed plate 1. A housing 4 is threadedly connected to the inner ring of the first hexagonal sleeve 3. A second hexagonal sleeve 7 is threadedly connected to the outer surface of the right end of the housing 4. A probe 8 is threadedly connected to the inner ring of the second hexagonal sleeve 7. Multiple sets of annularly arranged sensing heads 10 are fixedly installed on the inner sidewall of the probe 8. A sealing cap 11 is fixedly connected to the right side of the probe 8. Inside the cylinder 2, there are two data lines 14. A micro pressure-sensitive chip 18 is electrically connected to a temperature compensation module 19 via wires. The temperature compensation module 19 is electrically connected to a linear compensation module 20 via wires. The linear compensation module 20 is electrically connected to a signal amplification module 21 via wires. The signal amplification module 21 is electrically connected to a voltage-to-current conversion module 22 via wires. The voltage-to-current conversion module 22 is electrically connected to a reverse polarity protection module 23 via wires. The reverse polarity protection module 23 is electrically connected to a pressure overload current limiting module 24 via wires. The current limiting module 24 is electrically connected to the communication module 25 via wires. The communication module 25 is electrically connected to the self-calibration module 26 via wires. Through the micro pressure-sensitive chip 18, high-sensitivity and low-power pressure signal detection is achieved, enabling accurate measurement of minute gas pressures and differential pressures. With the cooperation of the temperature compensation module 19 and the linear compensation module 20, the influence of ambient temperature changes and nonlinear errors on the measurement results is effectively eliminated, ensuring high-precision measurement of the sensor in different environments. The signal amplification module 21 can amplify weak electrical signals to the industrial standard output range, improving the signal-to-noise ratio. The voltage-to-current conversion module 22 can convert voltage signals into current signals with strong anti-interference capabilities, facilitating long-distance transmission. The reverse polarity protection module 23 and the pressure overload current limiting module 24 prevent equipment damage caused by reverse power connection and pressure overload, respectively, improving the reliability of the system. Through the communication module 25 and the self-calibration module 26, remote monitoring and automatic calibration functions are supported, further enhancing the intelligence level and measurement accuracy of the sensor.
[0024] In this embodiment, two sets of positioning blocks 5 are fixedly connected to the right side of the fixing plate 1. The ends of the two sets of positioning blocks 5 that are close to each other are in contact with the outer surface of the outer shell 4. The outer shell 4 is made of stainless steel. The positioning blocks 5 facilitate the positioning of the outer shell 4. A limiting ring 6 is fixedly connected to the outer surface of the outer shell 4, and the limiting ring 6 is in contact with the positioning blocks 5. The limiting ring 6 facilitates the positioning of the outer shell 4. A blocking ring 9 is fixedly connected to the outer surface of the probe 8, and the number of blocking rings 9 is at least four. The blocking rings 9 can protect the sensing head 10.
[0025] In this embodiment, a reinforcing ring 12 is fixedly connected to the left side of the fixing plate 1. The inner ring of the reinforcing ring 12 is fixedly connected to the outer surface of the connecting cylinder 2. The reinforcing ring 12 facilitates the reinforcement of the connecting cylinder 2. A protective pad 13 is fixedly connected to the left side of the fixing plate 1. The protective pad 13 is made of rubber. The protective pad 13 facilitates the blocking of the fixing plate 1. A fastener 15 is fixedly connected to the outer surface of the data cable 14. A connecting block 17 is fixedly connected to the right end of the fastener 15. The outer surface of the connecting block 17 is fixedly connected to the inner side wall of the connecting cylinder 2. The connecting block 17 is fixedly connected to the data cable 14. The fastener 15 facilitates the binding of the data cable 14. Two sets of mounting holes 16 are provided on the right side of the fixing plate 1. The inner ring of each mounting hole 16 is threaded. The mounting holes 16 facilitate the installation of the fixing plate 1.
[0026] The working principle of this invention is as follows: During use, the micro pressure-sensitive chip 18 receives the gas pressure signal and converts it into a weak electrical signal. Subsequently, the signal is processed sequentially by the temperature compensation module 19, the linear compensation module 20, and the signal amplification module 21, which respectively eliminate the influence of temperature changes on the measurement results, correct nonlinear errors, and amplify the signal to the industrial standard output range. The amplified signal is then converted into a current signal with strong anti-interference capability by the voltage-to-current conversion module 22, facilitating long-distance transmission. At the same time, the reverse polarity protection module 23 and the pressure overload current limiting module 24 can respectively prevent equipment damage caused by reverse power connection and pressure overload. The communication module 25 and the self-calibration module 26 support remote monitoring and automatic calibration functions, ensuring measurement accuracy and the intelligence level of the system. This sensor can reliably measure gas pressure and differential pressure in various industrial environments, meeting the requirements of high precision and high stability.
[0027] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.
Claims
1. A smart gas pressure and differential pressure sensor, characterized in that, The device includes a fixed plate (1) and a micro pressure-sensitive chip (18). A connecting cylinder (2) is fixedly connected to the left side of the fixed plate (1), and a first hexagonal sleeve (3) is fixedly connected to the right side of the fixed plate (1). A shell (4) is threadedly connected to the inner ring of the first hexagonal sleeve (3). A second hexagonal sleeve (7) is threadedly connected to the outer surface of the right end of the shell (4). A probe (8) is threadedly connected to the inner ring of the second hexagonal sleeve (7). Multiple sets of annularly arranged sensing heads (10) are fixedly installed on the inner wall of the probe (8). A sealing cap (11) is fixedly connected to the right side of the probe (8). Two data lines (14) are provided inside the connecting cylinder (2). The micro pressure-sensitive chip (18) is connected to... A temperature compensation module (19) is electrically connected via a wire. The temperature compensation module (19) is electrically connected via a wire to a linear compensation module (20). The linear compensation module (20) is electrically connected via a wire to a signal amplification module (21). The signal amplification module (21) is electrically connected via a wire to a voltage-to-current conversion module (22). The voltage-to-current conversion module (22) is electrically connected via a wire to a reverse polarity protection module (23). The reverse polarity protection module (23) is electrically connected via a wire to a pressure overload current limiting module (24). The pressure overload current limiting module (24) is electrically connected via a wire to a communication module (25). The communication module (25) is electrically connected via a wire to a self-calibration module (26).
2. The intelligent gas pressure and differential pressure sensor according to claim 1, characterized in that, Two sets of positioning blocks (5) are fixedly connected to the right side of the fixing plate (1). The two sets of positioning blocks (5) are in contact with the outer surface of the outer shell (4) at their closest points. The outer shell (4) is made of stainless steel.
3. The intelligent gas pressure and differential pressure sensor according to claim 2, characterized in that, A limiting ring (6) is fixedly connected to the outer surface of the outer shell (4), and the limiting ring (6) is in contact with the positioning block (5).
4. The intelligent gas pressure and differential pressure sensor according to claim 1, characterized in that, The outer surface of the probe (8) is fixedly connected with a blocking ring (9), and the number of blocking rings (9) is at least four.
5. The intelligent gas pressure and differential pressure sensor according to claim 1, characterized in that, A reinforcing ring (12) is fixedly connected to the left side of the fixing plate (1), and the inner ring of the reinforcing ring (12) is fixedly connected to the outer surface of the connecting cylinder (2).
6. The intelligent gas pressure and differential pressure sensor according to claim 1, characterized in that, A protective pad (13) is fixedly connected to the left side of the fixing plate (1), and the protective pad (13) is made of rubber.
7. The intelligent gas pressure and differential pressure sensor according to claim 1, characterized in that, The outer surface of the data cable (14) is fixedly connected to a fastener (15), and the right end of the fastener (15) is fixedly connected to a connecting block (17). The outer surface of the connecting block (17) is fixedly connected to the inner wall of the connecting cylinder (2), and the connecting block (17) is fixedly connected to the data cable (14).
8. The intelligent gas pressure and differential pressure sensor according to claim 1, characterized in that, The right side of the fixing plate (1) is provided with two sets of mounting holes (16), and the inner ring of each mounting hole (16) is provided with threads.