The hot -infrared human sensor seems to be a cats eyes. It monitors the emotion at night. As long as the person at ≤8 meters, the perspective angle is 120 °, you can turn on the monitoring lighting light, and connect the anti -theft alarm to the high -rise and multi -storey building corridors.The switching light is very safe.
Human sensor circuit
Working principle string 6 This device circuit principle is shown in the figure.It is composed of infrared sensors, signal amplifier circuits, voltage comparators, delay circuits and audio alarm circuits.When the infrared detection sensor IC1 detects the infrared signal radiated by the human body in front, it is output with a weak electrical signal of the ② foot of IC1.Low noise magnification, at this time the signal output by the IC2① foot is strong enough.IC3 is used as a voltage comparator. Its ⑤ foot is provided by R10 and VD1 to provide a reference voltage. When the signal voltage output by the IC2① foot reaches the ⑥ foot of IC3, the voltage of the two input terminals is compared. At this timeHigh level becomes low.IC4 is a alarm delay circuit, and the R14 and C6 form a delayed circuit, which is about 1 minute.When the foot of IC3 becomes low -power, C6 is discharged through VD2. At this time, the ② foot of IC4 becomes a low level. It compares with the ③ foot -based voltage of IC4. When it is lower than its reference voltage, IC4’s of IC4① The foot becomes a high level, the VT2 is turned on, and the responser BL is powered on the alarm.After the human bodys infrared signal disappears, the ⑦ foot of IC3 restores high level output, and the VD2 cuts at this time.Since the voltage at both ends of the C6 cannot be changed, it is slowly charged to C6 through the R14. When the voltage at both ends of the C6 is higher than its reference voltage, the ① foot of IC4 becomes low, which is about 1 minute, that is, 1 minute to call the police for 1 minute,Essence
Human sensor production
1 Basic design requires that the following functions should be realized: (1) When there are people indoors, and intermittently in the selected spatial range (such as office and living room), the device can ensure normal power supply. The use of electric equipment is normal, continuously, continuously, and continuously.,Stable job.(2) When a person leaves some electric space, the device can automatically turn off the power within a certain period of time.(Such as 5 minutes, 8 minutes, 10 minutes, etc., you can choose. According to the test, statistics and analysisAffiliated devices of electric equipment.It can also be made into a general -purpose power equipment connector, which can be connected to the single -phase AC power or the connection of the three -phase AC power supply.(4) It must have the function of power -off self -locking.(5) According to the basic principles of this design, it can be designed and applied to the general switch box or controller of the classrooms of the college and the laboratory room.
Human sensor price
The price is generally not expensive. The hot -infrared human sensor seems to be a cats eyes. It monitors the emotion at night. As long as people are at ≥8 meters, the viewing angle can turn on the surveillance lighting, and the anti -theft alarm can be connected to high -level high -level police.And the switch light of the multi -layer building corridor.
Principle of human sensors
The infrared intelligent power -saving switch is an automatic control product based on infrared technology. When someone enters the range of induction, the dedicated sensor detects the changes in the infrared spectrum of the human body. The automatic connection is connected., Delay automatic shutdown load.People reach the lights, people leave the lights, be kind and convenient, safe and energy -saving, and it shows humanized care.This is through the principle of infrared reflection. When the human body or the body of the body is in the infrared area of ??the infrared human sensor, the infrared rays emitted by the infrared launch tube are reflected in the infrared receiving tube due to the human body or the body.The micro -computer processing signal is sent to the pulse solenoid valve. After the solenoid valve accepts the signal, open the valve core to control the water by the specified instruction; when the human body or body leaves the infrared induction range, the solenoid valve does not accept the signal, the solenoid valve core core, the solenoid valve coreTurn off the water through the reset of the internal spring.

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