CN200972458Y

CN200972458Y - Pyroelectric infrared probe capable of investigating static human body signal

Info

Publication number: CN200972458Y
Application number: CN 200620031923
Authority: CN
Inventors: 邓斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-10
Filing date: 2006-05-10
Publication date: 2007-11-07
Anticipated expiration: 2016-05-10

Abstract

The utility model provides a pyroelectric infrared detector that detects static human signals, which comprises a pyroelectric infrared sensor, the front end of which is fixed with a Fresnel lens. The Fresnel lens is fixed inside a casing and is joined and fixed with the inner ring of deep groove bearing via the casing, and the outer ring of the deep groove bearing is fixed on the frame; meanwhile the casing is joined and fixed with the big gear, and the micromotor drives the small gear, which in turn rotates the big gear, the casing and Fresnel lens. Finally, through the rotation of the Fresnel lens relative of the pyroelectric infrared detector the device realizes the detection of static human signals. This device changes the status that conventional pyroelectric infrared detectors only detect dynamic human signals, so the device expands the utilization scope of pyroelectric infrared detectors, in particular that the application of the pyroelectric infrared sensing and lighting dual-control energy-saving light circuit can be popularized.

Description

Can detect the pyroelectric infrared detector of static human body signal

Technical field the utility model relates to the rpyroelectric infrared Detection Techniques, particularly based on the illuminating lamp energy-saving control circuit of this technology.

Background technology rpyroelectric infrared Detection Techniques belong to a kind of of passive type infrared detection technique, it is that the small energy variation of utilizing rpyroelectric infrared to survey the micro-infrared that unit gives off biosome converts corresponding electric signal to, and amplify, handle, to realize control to monitored object.Its senser element is mainly surveyed unit by interference filter, rpyroelectric infrared and is formed.The main effect of interference filter is the interference spectrum of filtering " background ", keeps the characteristic spectrum of " target ".Rpyroelectric infrared is surveyed unit and is used for the infrared energy variation of detected activity object.For improving its detection sensitivity, technically install Fresnel Lenses additional at the pyroelectric infrared sensor front end usually, thereby constitute pyroelectric infrared detector.Install the effect of Fresnel Lenses additional, the one, the infrared ray that monitored space radiation is come focuses to sensor, the 2nd, be a series of infrared " highly sensitive induction zone " and " blind areas " that replace with monitored separated by spaces, when motion " target " object enters " blind area " by " highly sensitive induction zone ", rpyroelectric infrared is surveyed unit and just can be detected tangible infrared energy and change.

As can be seen, existing pyroelectric infrared detector requires " target " object to move from above introduction, and it is inoperative for static " target " object.Because this point defect of pyroelectric infrared detector, we use the designed illuminating lamp energy-saving control circuit of rpyroelectric infrared Detection Techniques now, only can be used for the control of aisle illuminating lamp, though some circuit is by adding time delay process, can satisfy the situation that human body stops in short-term in monitored space, but need the place (as classroom, library, office space, family room etc.) of long-time static stop still can't use for human body.

The summary of the invention the purpose of this utility model provides a kind of pyroelectric infrared detector that detects the static human body signal, enlarges the application based on the illuminating lamp energy-saving control circuit of rpyroelectric infrared Detection Techniques.

The purpose of this utility model is achieved in that the Fresnel Lenses in the pyroelectric infrared sensor front of detector is installed in the sleeve pipe, and be connected and fixed by sleeve pipe and deep groove ball bearing inner ring, the deep groove ball bearing outer ring is fixed on the frame, sleeve pipe and gear wheel are connected and fixed simultaneously, the micromachine driving pinion, drive gear wheel, sleeve pipe, Fresnel Lenses rotation successively, finally realize Fresnel Lenses rotating relative to pyroelectric infrared sensor.When Fresnel Lenses rotates, infrared " the highly sensitive induction zone " and " blind area " that are separated into by lens constantly change in the spatial distributions position, no matter it is static that the human body in the monitored space moves, all constantly experience the process of redirect between " highly sensitive induction zone " and " blind area ", thereby pyroelectricity detection unit can detect tangible infrared energy variation.

Innovative approach of the present utility model all concentrates on the Fresnel Lenses place of detector front end, and original sensor spare, circuit structure comprise that the already present integrated process chip at pyroelectric infrared sensor of some existing markets still can use.The utility model rotates by the Fresnel Lenses that makes detector front end, causes the relative motion between detector and tested human body, thereby guarantees the human infrared radiation energy signal that always changes that pyroelectricity detection unit receives, and human body signal can detectedly be discerned.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments for description of drawings.

Fig. 1 is the sectional view of improved end of probe device in the utility model.

This modifying device of embodiment comprises a deep groove ball bearing, bearing outer ring [2] is fixed on the frame [1], bearing inner race [3] is connected and fixed by sleeve pipe [4] and gear wheel [8], pinion wheel [9] is driven by micromachine [7], mesh with gear wheel [8], Fresnel Lenses [6] is installed in the sleeve pipe [4], is pyroelectric infrared sensor [5] behind the lens.

Ratio of gear between the rotating speed of micromachine [7], gear wheel [8] and pinion wheel [9] should be complementary with the amplification frequency band of amplifier in the amplifying circuit of back.But because the rotating speed of micromachine [7] is all bigger usually, be limited to the space simultaneously, gear ratio is also less, and the rotating speed that causes final Fresnel Lenses [6] to obtain is bigger, so for reaching coupling, the easiest method is to improve the amplification frequency of amplifier.

The position of Fresnel Lenses [6] in sleeve pipe [4], promptly and the distance between pyroelectric infrared sensor [5] can adjust as required.

When this utility model was applied to rpyroelectric infrared sensing and illumination dual-control energy-saving circuit for lamp, micromachine [7] should when light more secretly need throw light on, start micromachine [7] by the light-operated link control of circuit.

Claims

1. can detect the pyroelectric infrared detector of static human body signal, this detector comprises a pyroelectric infrared sensor [5], at its front end Fresnel Lenses [6] is installed, it is characterized in that described Fresnel Lenses [6] is installed in the sleeve pipe [4], and be connected and fixed by sleeve pipe [4] and deep groove ball bearing inner ring [3], deep groove ball bearing outer ring [2] is fixed on the frame [1], sleeve pipe [4] is connected and fixed with gear wheel [8] simultaneously, micromachine [7] driving pinion [9], drive gear wheel [8] successively, sleeve pipe [4], Fresnel Lenses [6] rotates, and finally realizes Fresnel Lenses [6] rotating relative to pyroelectric infrared sensor [5].

2. detector according to claim 1, when it was applied to rpyroelectric infrared sensing and illumination dual-control energy-saving circuit for lamp, the startup that it is characterized in that micromachine [7] when light secretly need throw light on, started micromachine [7] by the light-operated link control of circuit.