Temperature and pressure integrated sensor

Abstract

The utility model relates to the technical field of sensors, and particularly discloses a temperature and pressure integrated sensor which comprises a metal shell, a plug-in connector, a temperature sensitive element, a pressure sensitive element and a controller, the temperature sensitive element, the pressure sensitive element and the controller are fixed in the metal shell, and the controller is electrically connected with the pressure sensitive element and the temperature sensitive element; a sealing cover is fixed on the peripheral side of the temperature sensitive element, and a first medium channel for medium circulation is arranged between the sealing cover and the metal shell; the plug-in connector is fixedly connected to one end of the metal shell, and the plug-in connector is electrically connected with the controller and used for transmitting electric energy and data; an insulating seat is arranged between the pressure sensitive element and the temperature sensitive element, and the insulating seat is abutted against the inner wall of the metal shell and the inner wall of the sealing cover, so that a closed space is formed in the sealing cover; a second medium channel used for medium circulation is formed in the insulating base, and the first medium channel is communicated with the second medium channel. The pressure and temperature of the medium can be detected at the same time, and good practicability is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of sensors, and in particular to an integrated temperature and pressure sensor. Background Art

[0002] A temperature sensor is a device that senses temperature and converts it into a recognizable electrical signal according to a specific pattern. A commonly used and important component is the NTC thermistor. NTC thermistors are special semiconductor resistors whose resistance decreases as temperature increases. These resistors are typically made from a ceramic material sintered from a mixture of metal oxides such as manganese (Mn), nickel (Ni), and cobalt (Co). NTC thermistors are widely used in temperature measurement, temperature control, power supply surge suppression, and temperature compensation.

[0003] A pressure sensor is a sensor that senses pressure signals and converts them into recognizable electrical signals according to specific patterns. Capacitive pressure sensors are commonly used, using a circular metal film as one electrode of a capacitor. When the film deforms in response to pressure, the capacitance between the film and the fixed electrode changes. A measuring circuit then outputs an electrical signal that is proportional to the voltage. Capacitive pressure sensors offer low input energy and high dynamic response, making them widely used in industrial automation, healthcare, environmental monitoring, and other fields.

[0004] In actual use, it is found that some industries need to measure both pressure and temperature parameters of the medium at the same time. However, when temperature sensors and pressure sensors are installed at the same time, they take up a lot of space and are inconvenient to install. Utility Model Content

[0005] In order to use one sensor to measure temperature and pressure simultaneously, the present application provides a temperature-pressure integrated sensor that can achieve simultaneous sensing of temperature and pressure in a limited space with high sensing sensitivity.

[0006] This application provides a temperature and pressure integrated sensor, which adopts the following technical solution:

[0007] A temperature and pressure integrated sensor comprises a metal shell, a connector, and a temperature-sensitive element, a pressure-sensitive element and a controller fixed in the metal shell, wherein the pressure-sensitive element is located between the temperature-sensitive element and the controller, and the controller is electrically connected to the pressure-sensitive element and the temperature-sensitive element, respectively; a sealing cover is fixed on the peripheral side of the temperature-sensitive element, and a first medium channel for medium circulation is provided between the sealing cover and the metal shell; the connector is fixedly connected to one end of the metal shell away from the temperature-sensitive element, and the connector is electrically connected to the controller for the transmission of electrical energy and data; an insulating seat is provided between the pressure-sensitive element and the temperature-sensitive element, the insulating seat abuts against the inner wall of the metal shell, and a fixed block is protruded from one end of the insulating seat, and the fixed block abuts against the inner wall of the sealing cover to form a closed space inside the sealing cover; a second medium channel for medium circulation is provided in the insulating seat, and the first medium channel is connected to the second medium channel.

[0008] By adopting the above technical solution, the medium flows in the first medium channel and the second medium channel, the temperature sensitive element measures the temperature, and the pressure sensitive element measures the pressure. The controller collects the signals detected by the temperature sensitive element and the pressure sensitive element, processes them, and then outputs them to an external device to realize the detection of the pressure and temperature of the medium.

[0009] Optionally, the temperature sensitive element includes a terminal and an NTC thermistor, and two terminals are provided, one end of the two terminals is electrically connected to two pins of the NTC thermistor, and the other end of the two terminals is electrically connected to the controller.

[0010] By adopting the above technical solution, the NTC thermistor has high sensitivity, can detect small temperature changes, and has a fast response, and can quickly and accurately detect the temperature of the medium.

[0011] Optionally, the terminal is integrally injection-molded inside the insulating seat.

[0012] By adopting the above technical solution, the terminal is integrally injection-molded inside the insulating seat, which can enhance the structural strength of the sensor and achieve the purpose of protecting the electronic components.

[0013] Optionally, it further includes a first sealing ring and a second sealing ring, wherein the first sealing ring is arranged between the insulating seat and the pressure sensitive element, and the second sealing ring is arranged between the insulating seat and the inner wall of the metal shell.

[0014] By adopting the above technical solution, the first sealing ring is located between the insulating seat and the pressure sensitive element to prevent the medium from flowing out of the second medium channel, thereby protecting the electrical components; the second sealing ring is located between the metal shell and the insulating seat to prevent the medium from flowing out through the peripheral side of the insulating seat and causing damage to the electrical components.

[0015] Optionally, the pressure sensitive element is a capacitive pressure sensor core.

[0016] By adopting the above technical solution, the capacitive pressure sensor core has good temperature stability and high sensitivity, can sense tiny deformations and respond quickly, and can quickly and accurately detect the pressure of the medium.

[0017] Optionally, a joint is integrally formed at one end of the metal shell away from the temperature sensitive element, and an outer peripheral side of the joint is provided with an external thread.

[0018] By adopting the above technical solution, the external thread cooperates with the internal thread on the device to be detected, thereby achieving a stable connection between the sensor and the device to be detected.

[0019] Optionally, a sealing groove is formed at one end of the joint close to the metal shell, and a third sealing ring is embedded in the sealing groove.

[0020] By adopting the above technical solution, the third sealing ring can improve the sealing performance of the connection between the sensor and the device to be detected, thereby ensuring the accuracy and stability of the sensor detection data.

[0021] Optionally, the metal housing, connector, joint, sealing cover, insulating seat, pressure sensitive element, temperature sensitive element and controller are all coaxially installed.

[0022] By adopting the above technical solution, the overall structure of the sensor is made more compact, and the structural stability of the sensor is effectively improved.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The medium flows in the first medium channel and the second medium channel, the temperature sensitive element measures the temperature, and the pressure sensitive element measures the pressure. The controller collects the signals detected by the temperature sensitive element and the pressure sensitive element, processes them, and outputs them to the external device to realize the detection of the pressure and temperature of the medium.

[0025] 2. By setting a first sealing ring and a second sealing ring, the first sealing ring is located between the insulating seat and the pressure sensitive element to prevent the medium from flowing out of the second medium channel, thereby protecting the electrical components; the second sealing ring is located between the metal shell and the insulating seat to prevent the medium from flowing out through the peripheral side of the insulating seat and causing damage to the electrical components.

[0026] 3. By setting the third sealing ring, the third sealing ring can improve the sealing of the connection between the sensor and the device to be detected, which is used to ensure the accuracy and stability of the sensor detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0029] Figure numerals: 1. Metal housing; 2. Temperature sensitive element; 21. Terminal; 22. NTC thermistor; 3. Pressure sensitive element; 4. Sealing cover; 5. Controller; 51. Circuit board; 52. Acquisition chip; 6. First medium channel; 7. Connector; 8. Insulating seat; 81. Fixing block; 82. Second medium channel; 83. First sealing ring; 84. Second sealing ring; 9. Connector; 91. Sealing groove; 92. Third sealing ring. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application discloses a temperature and pressure integrated sensor. Figure 1 and Figure 2 , including a metal shell 1 and a temperature sensitive element 2, a pressure sensitive element 3, a sealing cover 4 and a controller 5 fixed in the metal shell 1, the temperature sensitive element 2 is used to detect temperature signals, the pressure sensitive element 3 is used to detect pressure signals, and the pressure sensitive element 3 and the temperature sensitive element 2 are electrically connected to the controller 5 respectively; a sealing cover 4 is fixed on the peripheral side of the temperature sensitive element 2, and a first medium channel 6 for medium circulation is provided between the sealing cover 4 and the metal shell 1.

[0032] When in use, the sensor is fixedly connected to the device to be detected, the medium flows into the metal shell 1 through the first medium channel 6, the temperature sensitive element 2 detects the temperature signal, and the pressure sensitive element 3 detects the pressure signal. The controller 5 collects the signals detected by the temperature sensitive element 2 and the pressure sensitive element 3, processes them, and outputs them to the external device to realize the detection of the pressure and temperature of the medium.

[0033] One end of the metal shell 1 is fixedly connected to a connector 7, which is electrically connected to the controller 5 for transmitting power and data. In this embodiment, the metal shell 1 and the connector 7 are connected by riveting or threading.

[0034] The temperature sensitive element 2 is disposed at an end of the metal housing 1 away from the connector 7. The temperature sensitive element 2 includes a terminal 21 and an NTC thermistor 22. There are two terminals 21, one end of each terminal 21 is electrically connected to two pins of the NTC thermistor 22, and the other end of each terminal 21 is electrically connected to the controller 5.

[0035] The pressure sensitive element 3 is disposed at one end of the temperature sensitive element 2 close to the connector 7 . In this embodiment, the pressure sensitive element 3 is a capacitive pressure sensor core.

[0036] The controller 5 includes a circuit board 51 and a collection chip 52 electrically connected to the circuit board 51. The controller 5 is arranged between the connector 7 and the pressure sensitive element 3, and is used to collect the signals collected by the temperature sensitive element 2 and the pressure sensitive element 3 and convert them.

[0037] An insulating base 8 is positioned between the temperature-sensitive element 2 and the pressure-sensitive element 3. This base abuts the inner wall of the metal housing 1 to prevent damage to the electrical components. A fixing block 81 protrudes from the end of the insulating base 8 facing the temperature-sensitive element 2. This fixing block 81 abuts the inner wall of the sealing cover 4, creating a closed space within the sealing cover 4. Furthermore, the terminals 21 are integrally injection-molded within the insulating base 8 to protect the electrical components.

[0038] A second medium channel 82 is provided in the insulating seat 8 and is connected to the first medium channel 6 . The medium flows in the first medium channel 6 and the second medium channel 82 , so that the medium is in direct contact with the pressure sensitive element 3 to measure the pressure.

[0039] Furthermore, a first sealing ring 83 is fixed to the circumference of the second medium channel 82 . The first sealing ring 83 abuts against the insulating seat 8 and the pressure sensitive element 3 respectively to prevent the medium from flowing out, thereby protecting the electrical components.

[0040] Furthermore, a second sealing ring 84 is provided between one end of the insulating seat 8 close to the fixing block 81 and the inner wall of the metal housing 1 to prevent the medium from flowing out through the peripheral side of the insulating seat 8 and causing damage to the electrical components.

[0041] The end of the metal shell 1 away from the connector 7 is integrally connected to a connector 9, and the diameter of the connector 9 is smaller than the diameter of the metal shell 1; the outer peripheral side of the connector 9 is provided with an external thread, which cooperates with the internal thread on the device to be detected to achieve a stable connection between the sensor and the device to be detected.

[0042] Furthermore, an annular sealing groove 91 is provided on the outer peripheral side of the connector 9, and the sealing groove 91 is located at one end of the connector 9 close to the metal shell 1; a third sealing ring 92 is embedded in the sealing groove 91, and the third sealing ring 92 can improve the sealing of the connection between the sensor and the equipment to be detected, and is used to ensure the accuracy and stability of the sensor detection data.

[0043] Furthermore, the closed end of the sealing cover 4 and the NTC thermistor 22 protrude from the end of the connector 9. When detecting the medium, the medium is in full contact with the sealing cover 4, so that the temperature of the medium is more evenly transferred to the inside of the sealing cover 4, making the data detected by the NTC thermistor 22 more accurate.

[0044] Preferably, the metal housing 1 , the connector 7 , the joint 9 , the sealing cover 4 , the insulating seat 8 , the pressure sensitive element 3 , the temperature sensitive element 2 , the circuit board 51 and the acquisition chip 52 are all coaxially mounted.

[0045] The implementation principle of an integrated temperature and pressure sensor disclosed in an embodiment of the present application is as follows: the sensor is fixedly connected to the device to be detected, the medium flows in the first medium channel 6 and the second medium channel 82, the temperature sensitive element 2 detects the temperature signal, and the pressure sensitive element 3 detects the pressure signal. The controller 5 collects the signals detected by the temperature sensitive element 2 and the pressure sensitive element 3 and processes them and then outputs them to an external device to realize the detection of the pressure and temperature of the medium.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A temperature and pressure integrated sensor, characterized in that: The invention comprises a metal shell (1), a connector (7), and a temperature sensitive element (2), a pressure sensitive element (3), and a controller (5) fixed in the metal shell (1), wherein the pressure sensitive element (3) is located between the temperature sensitive element (2) and the controller (5), and the controller (5) is electrically connected to the pressure sensitive element (3) and the temperature sensitive element (2) respectively; a sealing cover (4) is fixed on the peripheral side of the temperature sensitive element (2), and a first medium channel (6) for medium circulation is provided between the sealing cover (4) and the metal shell (1); the connector (7) is fixedly connected to the metal shell (1) away from the temperature sensitive element (2) and the pressure sensitive element (3). At one end of the element (2), the connector (7) is electrically connected to the controller (5) for transmission of electric energy and data; an insulating seat (8) is provided between the pressure sensitive element (3) and the temperature sensitive element (2), the insulating seat (8) abuts against the inner wall of the metal shell (1), and a fixed block (81) is protruded from one end of the insulating seat (8), the fixed block (81) abuts against the inner wall of the sealing cover (4) to form a closed space inside the sealing cover (4); a second medium channel (82) for medium circulation is opened in the insulating seat (8), and the first medium channel (6) is connected to the second medium channel (82).

2. The integrated temperature and pressure sensor according to claim 1, characterized in that: The temperature sensitive element (2) comprises a terminal (21) and an NTC thermistor (22), wherein two terminals (21) are provided, one end of the two terminals (21) is electrically connected to two pins of the NTC thermistor (22), and the other end of the two terminals (21) is electrically connected to the controller (5).

3. The integrated temperature and pressure sensor according to claim 2, characterized in that: The terminal (21) is integrally injection-molded inside the insulating seat (8).

4. The integrated temperature and pressure sensor according to claim 1, characterized in that: It also includes a first sealing ring (83) and a second sealing ring (84), wherein the first sealing ring (83) is arranged between the insulating seat (8) and the pressure sensitive element (3), and the second sealing ring (84) is arranged between the insulating seat (8) and the inner wall of the metal shell (1).

5. The integrated temperature and pressure sensor according to claim 1, characterized in that: The pressure sensitive element (3) is a capacitive pressure sensor core.

6. The integrated temperature and pressure sensor according to claim 1, characterized in that: A joint (9) is integrally formed at one end of the metal shell (1) away from the temperature sensitive element (2), and an external thread is provided on the outer peripheral side of the joint (9).

7. The integrated temperature and pressure sensor according to claim 6, characterized in that: A sealing groove (91) is provided at one end of the joint (9) close to the metal shell (1), and a third sealing ring (92) is embedded in the sealing groove (91).

8. The integrated temperature and pressure sensor according to claim 1, characterized in that: The metal housing (1), the connector (7), the sealing cover (4), the insulating seat (8), the pressure sensitive element (3), the temperature sensitive element (2) and the controller (5) are all coaxially mounted.

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