High-range hydraulic sensor and manufacturing method thereof
A hydraulic sensor, high-range technology, applied in the direction of measuring fluid pressure, instruments, measuring devices, etc., can solve the problems of poor high and low temperature performance, high sensor cost, etc.
Inactive Publication Date: 2012-05-02
WUHU TONHE AUTOMOBILE FLUID SYST
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Problems solved by technology
[0003] At present, domestic pressure sensor companies use ceramic cores. The general working pressure range is within 5MPa, and it is difficult to achieve a larger range. Sensors with a range above 10MPa generally use diffused silicon, sputtering molds, etc., but this structure High sensor cost, poor high and low temperature performance
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[0025] Such as Figure 1 to Figure 2 As shown, the high-range hydraulic pressure sensor provided by the present invention includes a base 1, an O-ring 2 placed in the base 1, a ceramic core 4, a plastic part 9 and rear-end processing components, and is characterized in that : A retaining ring 3 is also provided on the base 1, and a locking ring 7 is provided between the plastic part 9 and the ceramic core 4.
[0026] The locking ring 7 is threadedly connected with the internal thread 5 provided on the base 1 and the external thread 11 provided on the locking ring 7 .
[0027] Adopting the above-mentioned technical solution, this high-range hydraulic pressure sensor adopts the sealing method of O-ring 2 and retaining ring 3 under high and low temperature conditions, and the deformation of O-ring 2 is controlled by retaining ring 3, and the plastic part 9 and A locking ring 7 is provided between the ceramic cores 4, and the locking ring 7 is screwed through the internal thread ...
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Abstract
The invention discloses a high-range hydraulic sensor, which comprises a base (1), an O-shaped ring (2) and a ceramic core body (4) which are placed in the base (1), a plastic piece (9) and a terminal processing element, wherein a shield ring (3) is also arranged on the base (1); and a locking ring (7) is arranged between the plastic piece (9) and the ceramic core body (4). The invention also discloses a manufacturing method of the sensor. By adopting the technical scheme, the high-range hydraulic sensor disclosed by the invention has simple structure and low cost; at the same time, by using a scheme of combining the O-shaped ring and the shield ring, partial stretching amount can be eliminated by the shield ring in a high / low temperature thermal-expansion and cold-shrinkage environment, the service life of the O-shaped ring is prolonged, and the product sealing property is improved; and the locking ring is arranged between the plastic piece and the ceramic core body, the locking ring is connected with the external thread on the locking ring through the internal thread on the base, thus the ceramic core body is locked and a bearing and sealing effect is achieved.
Description
technical field [0001] The invention belongs to the field of hydraulic pressure sensors, and more specifically, the invention relates to a high-range hydraulic pressure sensor, and the invention also relates to a manufacturing method of the above-mentioned high-range hydraulic pressure sensor. Background technique [0002] The working principle of the hydraulic sensor is to measure the pressure directly on the diaphragm of the ceramic core, causing the diaphragm to deform slightly. The thick film resistor is printed on the ceramic diaphragm and connected to form a Wheatstone bridge (closed bridge). Due to the pressure sensitive The piezoresistive effect of the resistance makes the bridge generate a highly linear voltage signal proportional to the pressure and proportional to the excitation voltage, causing the diaphragm to produce a micro-displacement proportional to the medium pressure, which changes the resistance of the sensor. The circuit detects this change and converts...
Claims
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IPC IPC(8): G01L9/06G01L1/18G01L19/00
Inventor 孙广朱宗恒徐鑫
Owner WUHU TONHE AUTOMOBILE FLUID SYST