Gas differential pressure sensor
A sensor and differential pressure technology, which is applied in the field of sensors, can solve problems such as poor contact, poor sealing effect, and limited use environment, and achieve the effects of simple and compact structure, saving labor costs, and improving production efficiency
Active Publication Date: 2015-11-18
KAILONG HIGH TECH
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Problems solved by technology
[0003] However, due to the poor sealing effect between the two cavities of the existing differential pressure sensors, or most of them choose potting glue, epoxy resin or one-component solid glue to encapsulate the sensing elements in the electronic components, this causes pressure In the case of high and low temperature changes of the differential sensor, the sensing element in the package is easily affected by thermal expansion and contraction of the packaging glue, resulting in desoldering or poor contact of the soldered pins. The accuracy of the measurement cannot be guaranteed, and the use environment is limited. Reduced sensor reliability
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[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0018] see figure 1 and figure 2 As shown, in this embodiment, a gas differential pressure sensor includes a housing 1, an upper cover 201, an inlay 202, a PCB circuit board 301 and a sensing element 302, and the housing 1 is made of plastic suitable for automotive applications material, and the periphery of the housing 1 is provided with several installation holes, the installation holes are embedded with stainless steel inserts 107, which can adapt to the harsh external environment, and are used to avoid The casing 1 is impacted by an external force, resulting in damage and fracture of the installation hole. The housing 1 is connected with a high-pressure port and a low-pressure port, and the high-pressure port and the low-pressure port are respectively connected to a high-pressure inlet pipe 1...
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The invention discloses a gas differential pressure sensor. The sensor comprises a housing body, an upper cover, an embedded piece, a PCB and a sensing element. A high voltage opening and a low voltage opening are connected to the housing body. A peripheral groove, an inner groove and an annular groove are arranged in the housing body. The peripheral groove is connected to the periphery of the upper cover via adhesive. The embedded piece is connected to the inner groove via adhesive. The annular groove is connected to the PCB via adhesive. The sensing element is arranged on the PCB. A silica gel pad is arranged between the embedded piece and the sensing element. The upper cover is connected to the embedded piece via adhesive. The sensor is simple and compact in structure and highly cost effective and can be automatically produced. Labor cost is reduced, production efficiency is increased, reliability of the sensor is greatly improved and use environment is extended.
Description
technical field [0001] The invention belongs to the sensor technology, in particular to a gas pressure difference sensor used for measuring the change of gas pressure at both ends of an internal combustion engine pipeline. Background technique [0002] A differential pressure sensor is a sensor used to measure the difference between two pressures, usually used to measure the pressure difference between the front and rear ends of an internal combustion engine pipe or component. The differential pressure sensor includes a chamber housing assembly and electronic components in the chamber assembly. The chamber housing assembly has two cavities connected by air intake pipes. The two cavities are isolated by the electronic components in the chamber assembly. A sensing element is arranged on the electronic assembly for sensing the air pressure difference between the two cavities. When in use, it is mounted on the body of the internal combustion engine or on other equipment through...
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IPC IPC(8): G01L13/00
Inventor 臧志成
Owner KAILONG HIGH TECH