Temperature and pressure integrated strain flat membrane sensor

Abstract

The utility model provides a temperature and pressure integrated strain flat film sensor, which belongs to the technical field of temperature and pressure integrated sensors and is provided with a sensor base, a temperature sensor is attached to the lower portion of the sensor base, a strain gauge is fixed at the bottom of the sensor base and fixed at the bottom of an inner cavity of an elastic body, and the elastic body is tightly connected with the base. The high-temperature conductive silver wire is connected with the strain gauge and the double-output board card, the double-output board card is arranged in the outer cover and is connected to the base through the board card fixing seat, the outer cover is tightly connected with the sensor base, the cable lead is locked above the outer cover through the waterproof wire locking cap, and four wires, one path of temperature and one path of pressure are output in the cable lead. According to the temperature and pressure integrated sensor, the dual-output board card is embedded in the temperature and pressure integrated sensor, so that the problems that a conventional sensor cannot measure viscous liquid and cannot measure pressure and temperature at the same time are solved, the price of the temperature and pressure integrated sensor is relatively lower than that of a sensor with a single function, and more media are measured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and particularly relates to a temperature and pressure integrated strain flat film sensor. Background Art

[0002] Existing sensor systems usually require separate installation of a pressure sensor and a temperature sensor, which not only increases the complexity of the system, but also may lead to limited installation space and signal synchronization problems. Even for sensors with two sensors integrated together, due to the superposition and combination of the two, the sensor materials used and the occupied space are still relatively large, and it is easy to have insensitive measurement and the stability is difficult to meet the requirements of high-precision measurement.

[0003] To solve the above existing problems, this solution adopts a temperature and pressure integrated strain flat film sensor, which combines the double characteristics of a temperature sensor and a pressure sensor. It can measure both temperature and pressure, and adopts a strain flat film structure, which can quickly sense external signals and can measure viscous liquids and cement mortar. Summary of the Utility Model

[0004] The technical problem solved by the utility model: Provide a temperature and pressure integrated strain flat film sensor, aiming to solve the problems that in the prior art, the sensor materials used for temperature and pressure measurement and the occupied space are still relatively large, and it is easy to have insensitive measurement.

[0005] The technical solution adopted by the utility model: A temperature and pressure integrated strain flat film sensor, a temperature sensor is attached to the lower part of the inner cavity of the sensor base, an elastic body is tightly connected to the lower end of the sensor base, a strain gauge is attached to the bottom of the inner cavity of the elastic body, a circle of ED ring is arranged around the connection part of the sensor base for sealing, a board card fixing seat is installed on the upper plate of the sensor base, a double-output board card is fixed above the board card fixing seat, an outer cover is tightly sleeved on the upper plate of the sensor base, a space for accommodating the double-output board card is formed between the inside of the outer cover and the upper plate of the sensor base, the strain gauge is electrically connected to the double-output board card through a high-temperature conductive silver wire, and the temperature sensor is electrically connected to the double-output board card through a Teflon wire.

[0006] As a preferred scheme of the utility model, the elastic body is made of 17-4H stainless steel, and the high-temperature conductive silver wire passes through the center of the sensor base and is connected to the double-output board card.

[0007] As a preferred scheme of the utility model, the low-power board card is connected to the sensor sintering seat through two-component silica gel.

[0008] As a preferred scheme of the utility model, the strain gauge adopts a φ6 strain gauge to detect the deformation of the elastic body caused by pressure.

[0009] As a preferred solution of the present utility model, the ED ring is made of fluorosilicone rubber ring.

[0010] As a preferred solution of the present utility model, the base is made of 316L stainless steel, and the Teflon wire passes through the center of the sensor base and is connected to the dual-output board.

[0011] As a preferred solution of the present utility model, the dual-output board is made of FR4 board. The output cable wires of the dual-output board are locked with waterproof wire caps. The dual-output board outputs one-way pressure signal and one-way temperature signal.

[0012] As a preferred solution of the present utility model, the waterproof wire cap adopts a PG7 waterproof wire cap to ensure the sealing of the cable wire connection.

[0013] Advantages of the present utility model compared with the prior art:

[0014] In this solution, the double-layer characteristics of a temperature sensor and a pressure sensor are integrated in one sensor. It can measure both temperature and pressure, and adopts a strain flat film structure, which can quickly sense external signals and can measure viscous liquids and cement mortar. Its structural design is to add a temperature sensor inside the pressure sensor. This makes the price of this sensor relatively cheaper than that of a single temperature sensor and a single pressure sensor, the measurement is more sensitive, and it can measure cement mortar and viscous liquids at the same time, greatly facilitating the use of customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0016] Figure 1 is a structural schematic diagram of the present utility model.

[0017] In the figure: 1, elastomer; 2, strain gauge; 3, high-temperature conductive silver wire; 4, temperature sensor; 5, Teflon wire; 6, base; 7, ED ring; 8, board fixing seat; 9, dual-output board; 10, outer cover; 11, waterproof wire cap; 12, cable wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0019] Example 1

[0020] Please refer to Figure 1 , the present utility model provides the following technical solutions:

[0021] A temperature and pressure integrated strain flat film sensor, including a sensor base 6. The sensor base 6 serves as the main body part of the sensor, providing a space for installing and fixing other components. A temperature sensor 4 is attached to the lower part of the inner cavity of the sensor base 6. The temperature sensor 4 uses PT100. The lower end of the sensor base 6 is tightly connected to an elastomer 1. A strain gauge 2 for measuring pressure is attached to the bottom of the inner cavity of the elastomer 1. A circle of ED ring 7 is provided around the connection part of the sensor base 6 for sealing, preventing external media or moisture from entering the sensor interior and affecting the measurement accuracy and equipment safety. A board card fixing seat 8 is installed on the upper plate of the sensor base 6. A dual-output board card 9 is fixed above the board card fixing seat 8, responsible for processing the signals from the strain gauge 2 and the temperature sensor 4 and converting them into available output signals. The upper plate of the sensor base 6 is tightly sleeved with an outer cover 10. A space for accommodating the dual-output board card 9 is formed between the interior of the outer cover 10 and the upper plate of the sensor base 6. The strain gauge 2 is electrically connected to the dual-output board card 9 through a high-temperature conductive silver wire 3. The temperature sensor 4 is electrically connected to the dual-output board card 9 through a Teflon wire 5 to achieve the transmission of the temperature measurement value.

[0022] Specifically, the elastomer 1 is made of 17-4H stainless steel. The high-temperature conductive silver wire 3 passes through the center of the sensor base 6 and is connected to the dual-output board card 9, which is suitable for high-temperature environments and ensures the stability of signal transmission. The strain gauge 2 uses a φ6 strain gauge to detect the deformation of the elastomer 1 caused by pressure and convert this deformation into an electrical signal. The ED ring 7 uses a fluorosilicone rubber ring, and the base 6 uses 316L stainless steel, which has excellent corrosion resistance and high-temperature resistance. The Teflon wire 5 passes through the center of the sensor base 6 and is connected to the dual-output board card 9. The dual-output board card 9 uses an FR4 board card, which has good electrical insulation performance and mechanical strength. The dual-output board card 9 outputs a cable wire 12 and locks it with a waterproof cable gland 11. The waterproof cable gland 11 is convenient for installation and disassembly, and at the same time ensures the firmness of the connection. The dual-output board card 9 outputs a pressure signal and a temperature signal. These two signals can be analog signals or digital signals, which are used for further monitoring, recording or control. The waterproof cable gland 11 uses a PG7 waterproof cable gland to ensure the sealing and long-term stability of the connection of the cable wire 12.

[0023] In specific applications, after the measurement surface of the temperature and pressure integrated strain flat film sensor is in full contact with the medium, when the elastic body 4 senses the medium pressure, it will produce a micro-deformation. This deformation is converted into an electrical signal through the strain gauge 2, and the electrical signal is transmitted to the dual-output board 9 through the high-temperature conductive silver wire 3. The base 6 conducts the heat in the medium to the temperature sensor 4, so that the temperature measured by the temperature sensor 4 is the temperature in the medium. Since the temperature sensor 4 senses the temperature change in the medium, the resistance value of the temperature sensor 4 will change. The change in the resistance value will be converted into a change in the voltage on the temperature sensor 4. Through the processing of the dual-output board 9, the change in this voltage will be recorded as the change in the medium temperature.

[0024] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A temperature and pressure integrated strain flat film sensor, having a sensor base (6), characterized in that: A temperature sensor (4) is attached to the lower part of the inner cavity of the sensor base (6). The lower end of the sensor base (6) is tightly connected to an elastomer (1). A strain gauge (2) is attached to the bottom of the inner cavity of the elastomer (1). A ring of ED rings (7) is provided around the connecting part of the sensor base (6) for sealing. A board card fixing seat (8) is installed on the upper plate of the sensor base (6). A dual-output board card (9) is fixed above the board card fixing seat (8). An outer cover (10) is tightly sleeved on the upper plate of the sensor base (6). A space for accommodating the dual-output board card (9) is formed between the inside of the outer cover (10) and the upper plate of the sensor base (6). The strain gauge (2) is electrically connected to the dual-output board card (9) through a high-temperature conductive silver wire (3). The temperature sensor (4) is electrically connected to the dual-output board card (9) through a Teflon wire (5).

2. The temperature and pressure integrated strain flat film sensor according to claim 1, characterized in that: The elastomer (1) is made of 17-4H stainless steel. The high-temperature conductive silver wire (3) passes through the center of the sensor base (6) and is connected to the dual-output board card (9).

3. The integrated temperature and pressure strain flat film sensor according to claim 1, wherein: The strain gauge (2) is a φ6 strain gauge used to detect the deformation of the elastomer (1) caused by pressure.

4. The integrated temperature and pressure strain flat film sensor according to claim 1, characterized in that: The ED ring (7) is made of fluorosilicone rubber. The temperature sensor (4) is a PT100.

5. The integrated temperature and pressure strain flat film sensor according to claim 1, characterized in that: The base (6) is made of 316L stainless steel. The Teflon wire (5) passes through the center of the sensor base (6) and is connected to the dual-output board card (9).

6. The temperature-pressure integrated strain flat film sensor according to claim 1, wherein: The dual-output board card (9) is a FR4 board card. The output cable wire (12) of the dual-output board card (9) is locked with a waterproof cable lock cap (11). The dual-output board card (9) outputs a pressure signal and a temperature signal.

7. The integrated temperature and pressure strain flat membrane sensor according to claim 6, wherein: The waterproof cable lock cap (11) is a PG7 waterproof cable lock cap to ensure the sealing of the connection of the cable wire (12).

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