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Obscuration detector

A technology of detectors and beams, applied in the field of dimming detectors, can solve the problems of not being able to test the operation function of full-intensity beams

Inactive Publication Date: 2006-03-29
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the form of electronic testing described above is all electronic and does not require a walkthrough, it does not test the operational function of a full intensity, partially dimmed beam

Method used

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Examples

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Embodiment Construction

[0027] Detailed Description of Preferred Embodiments

[0028] While the invention is susceptible to embodiments in many different forms, it is with the understanding that this disclosure is considered an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiments described. Illustrated in the drawings and will be described in detail herein.

[0029] Figure 1 illustrates a system 10 in accordance with the present invention. System 10 includes: a transmitter of radiant energy R or a beam source 12 . The light beam R can have any desired wavelength and can be generated by any suitable source, such as a laser or a laser diode, a light emitting diode, a gas discharge tube or all similar sources without limitation.

[0030] Light beam R is projected along path P to receiver or sensor 14 . The filter elements 16 located in the path P present a pattern selected for blocking the light beam R at least partially.

[0031] ...

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PUM

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Abstract

An automatic testable obscuration detector (10) incorporates one of an electrically controllable filter (16) or a mechanically selected filter (16). Filtered outputs can be compared to expected outputs by control circuitry (18) to automatically assess detector (10) operation.

Description

field of invention [0001] The present invention relates to dimming detectors which can be used to monitor a selected area for a predetermined condition such as smoke or intrusion. More specifically, the present invention relates to such probes including automatic test or alignment verification circuitry. Background of the invention [0002] Projected beam detectors are known for monitoring smoke levels in an area. Alternatively, they can monitor an area for trespassers. The detector typically includes a source of beams of radiant energy, such as lasers or laser diodes. A beam of light is projected across the monitored area to a reflector or sensor. The reflected beam returns to the sensor. [0003] The outputs from the respective sensors can be processed either locally or from a remote location. The intensity or brightness of the beam incident on the sensor can be compared to the intensity or brightness of the projected beam. [0004] If smoke or trespassers are presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J5/16G01B11/27G01J1/00G01J1/08G01N21/17G08B17/103G08B29/20
CPCG01J1/08G01J1/0418G01B11/272G01J1/0437G08B17/103
Inventor 斯各特·朗格里高利·维什施泰特
Owner HONEYWELL INT INC