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Pressure sensor

A pressure sensor, pressure technology, applied in the measurement of fluid pressure, instruments, vehicle safety arrangements, etc., can solve problems such as difficulty in pressure detection

Inactive Publication Date: 2009-02-11
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it becomes difficult to detect pressure with high accuracy

Method used

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Examples

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Embodiment approach

[0063] According to this example embodiment, the pressure detection space (ie, the target space for pressure detection) is the inner space of the vehicle door. The pressure sensor 1 senses a change in pressure of a door interior space caused by, for example, a collision between an object and the door. Limiting false detections is critical for sensors used to detect collisions. When the sensor is installed in the interior space of the door, if water freezes at the surface of the sensing element 40, the ice will be accelerated when the door is opened and closed. In this case, the sensor senses a false pressure change. When the sensor according to the present example embodiment is mounted on a door of a vehicle, it is possible to limit erroneous detections caused by the above-mentioned difficulties.

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Abstract

A pressure sensor is provided. The pressure sensor includes a body (10, 60), a sensing element (40), and a projection part (63). The body (10, 60) has an internal space and an introduction passage (110). The internal space is in communication with an outside of the body through the introduction passage (110). The sensing element (40) is disposed in the internal space of the body (10, 60) and capable of detecting pressure of air in the internal space. The projection part (63) is disposed in the internal space of the body (10, 60) or the introduction passage (110) of the body (10, 60), and inhibits liquid from entering the internal space.

Description

technical field [0001] The invention relates to a pressure sensor. Background technique [0002] Patent Document 1 describes a pressure sensor. According to Patent Document 1, a pressure sensor is installed in an inner space of a door of a vehicle to sense a collision occurring on one side of the vehicle. When an object collides with the door, the pressure sensor senses the pressure change in the interior space of the door. To detect such pressure changes, pressure sensors include lead-in channels. The introduction passage introduces the air of the interior space of the vehicle door to the pressure detection surface of the pressure sensor. The introduction channel is formed to extend in a direction perpendicular to the pressure detection surface of the pressure sensor, that is, a horizontal direction. [0003] Patent Document 2 describes another pressure sensor. According to Patent Document 2, the pressure sensor has an introduction channel leading to the pressure detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L19/00
CPCG01L19/142B60R21/0136B60R2021/0006G01L19/0654G01L19/0084G01L19/0038G01L19/141
Inventor 渡边达也
Owner DENSO CORP
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