Infrared human body sensing device with all-around human body sensing capability

Abstract

The invention discloses an infrared human body sensing device with an all-around human body sensing capability. The device comprises an installing base plate, a shell, a power indicator, a Fresnel lens, a pyroelectric infrared sensor and a controller and further comprises a rotating motor, an installing supporting frame, a reduction gearbox and a rotating gear, wherein the pyroelectric infrared sensor is arranged on the controller; the controller is arranged on a rotating disk; the rotating disk is arranged on a rotating shaft of the installing base plate through a shaft hole in the center; a circular gear rack is arranged on the circumference of the rotating disk and the circular gear rack is meshed with the rotating gear; the rotating motor can drive the rotating disk to rotate; the controller comprises a power supply circuit, a signal processing circuit, a motor control circuit and a microprocessor; and the controller is connected with a copper ring on the installing base plate through an elastic copper brush on the rotating disk and then is used for signal output. By the sensing device, both a moving human body and a static human body can be detected, and the application range is wide.

Description

technical field [0001] The invention relates to an infrared human body sensing device with full-state human body sensing capability, belonging to the technical field of sensors. Background technique [0002] In order to save energy and protect the environment, most of the public lighting areas are equipped with infrared induction lighting devices, and the infrared human body detection device is the core component. However, such infrared human body detection devices can only detect moving human bodies, and have no detection ability for stationary human bodies. The reason lies in the induction principle of pyroelectric infrared sensors. [0003] Domestic patent Z200810067283.6 discloses a pyroelectric infrared human body detection device, which includes a pyroelectric infrared sensor, a Fresnel lens, an electronic circuit and a moving mechanism. The pyroelectric infrared sensor is fixed on the moving mechanism. The moving mechanism includes a driving device and a supporting f...

AI Technical Summary

Problems solved by technology

However, the moving mechanism in this scheme adopts the way of swinging from side to side, which firstly increases the complexity of the structure, requires additional components for position detection, and the motor needs to be controlled in forward and reverse directions; secondly, due to the structural characteristics of the Fresnel lens, it determines The movement of the human body in the radial direction relative to the human body detection device has lower sensitivity than the movement in the circumferential direction, and the movement mechanism in this patent makes the movement of the human body relative to the human body detection device mostly belong to radial movement, so the detection sensitivity not optimal

Images