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Pyroelectric infrared sensor

A pyroelectric infrared and sensor technology, applied in the field of photosensitive devices, can solve problems such as inability to work normally, and achieve the effects of solving the inability to work normally, reducing background noise, and having a long detection distance

Inactive Publication Date: 2012-07-11
SENBA SENSING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, commonly used pyroelectric infrared sensors cannot work normally in environments with high background noise and sunlight

Method used

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  • Pyroelectric infrared sensor
  • Pyroelectric infrared sensor
  • Pyroelectric infrared sensor

Examples

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Embodiment Construction

[0011] Such as figure 1 with figure 2 As shown, the pyroelectric infrared sensor includes an annular tube cap 1 with an inner diameter of 8.25mm, and the annular tube cap 1 is covered on the annular tube cap 3, and the window of the annular tube cap 1 is inlaid with Infrared filter 2, an infrared filter 4 is inlaid in the window of the annular tube cap 3, the distance between the lower surface of the infrared filter 2 and the upper surface of the infrared filter 4 is 1 mm, and the detection sensitivity The element 5 is on the holder 6, the holder 6 is supported between the ceramic substrate 8 and the detection sensitive element 5, the triode 7 is placed in the through hole provided in the middle of the ceramic substrate 8, and the ceramic substrate 8 is placed in the tube On the seat 9, the circular tube cap 3 is covered on the tube seat 9, and the circular tube cap 1 is covered on the circular tube cap 3.

[0012] The pyroelectric infrared sensor is composed of three parts...

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Abstract

The invention, which belongs to the electrical equipment in the electronic information technology field and a photosensitive device of the electrical engineering category, particularly relates to a pyroelectric infrared sensor. The pyroelectric infrared sensor comprises a circular tube cap (1); an infrared optical fiber (2) is inlaid in a window of the circular tube cap (1); an infrared optical fiber (4) is inlaid in a window of a circular tube cap seat (3); a detection sensing element (5) is arranged in a retainer (6) that is used as a support gasket between a ceramic substrate (8) and the detection sensing element (5); a triode (7) is arranged in a through hole that is arranged in the middle of the ceramic substrate (8) that is arranged on a tube socket (9); the circular tube cap seat (3) is covered on the tube socket (9); and the circular tube cap (1) is covered on the circular tube cap seat (3). The sensor employing the above-mentioned scheme has a function that infrared rays with lengths beyond 8 to 14 um in sunlights can be filtered twice, so that the sensor can work normally in the sun and a detection distance will not be shortened.

Description

technical field [0001] The invention belongs to electrical equipment and electrical engineering photosensitive devices in the technical field of electronic information, in particular to a pyroelectric infrared sensor. Background technique [0002] When people choose a pyroelectric infrared sensor, they often consider whether the sensor can work normally in the sun and the detection distance. The working process of the commonly used pyroelectric infrared sensor is as follows: the infrared light emitted by the human body is projected onto the Fresnel lens, after being focused and enlarged by the lens, it is projected onto the infrared filter, and the infrared filter filters out clutter Then it is projected onto the detection sensitive element, and the detection sensitive element converts the optical signal into an electrical signal and outputs it from the field effect tube. However, commonly used pyroelectric infrared sensors cannot work normally in environments with high bac...

Claims

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Application Information

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IPC IPC(8): G01J5/10G01J5/06
Inventor 李红兵
Owner SENBA SENSING TECH CO LTD
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