Human body safety protection laser sensor used for revolution door
A laser sensor and safety protection technology, applied in revolving doors, safety arrangements, optical devices, etc., can solve problems such as complete protection of laser sensors installed on door frames, incomplete protection of infrared optical safety protection sensors, injury and other problems
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Embodiment 1
[0114] A human safety protection laser sensor for revolving doors, such as figure 1 with figure 2 Shown, including the laser scanning distance measurement part and the application analysis part. The laser scanning distance measuring and calculating part includes: a laser emitting device, a laser deflection device, an optical signal receiving device, and an analysis and processing device. The installation position of the sensor is the top of the door leaf 2 of the revolving door, 20cm away from the vertical outer frame of the door leaf 2 of the revolving door. Wherein, the laser emitting device emits pulsed laser signals to the laser deflection device. The laser deflection device deflects the directional pulse laser signal to a preset angle under the control of the analysis and processing device, and forms a laser scanning area 3 . The rotation angle of the laser scanning area 3 is 110°. The laser scanning area 3 is located at the front side of the area of the door leaf ...
Embodiment 2
[0122] Based on the laser sensor for human body safety protection for revolving doors described in Embodiment 1, wherein the trigger point distance analysis module first uses a delay time converter (TDC: time to digital converter) to calculate the time between the laser pulse emission and the return signal received. Time difference. Then, according to the time difference and the speed of light, the calculator further calculates the flight distance of the light pulse (TOF: time of flight), that is, the distance information between the trigger point and the sensor.
Embodiment 3
[0124]Based on the human body safety protection laser sensor for the revolving door described in Embodiment 1, wherein the preset distance information is completed through an initialization operation, the process is as follows: first, under the condition that no user enters or exits the revolving door, the sensor is turned on, so that It scans according to the preset maximum scanning angle, and makes the revolving door leaf rotate according to the preset direction and speed. Then, the sensor uses the trigger point distance information received by each scanning point as the preset distance information.
[0125] Wherein, during the initialization operation, when the same scanning point has two or more trigger point distance information within the same scanning period, the distance information of the trigger point closest to the sensor is used as the preset distance information. When the distance information of two or more trigger points appears at the same scanning point in the ...
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