CN201830228U - Human-body counting-type electrical-appliance switch - Google Patents

Abstract

A human body counting electrical switch, comprising two parts, a plastic shell and a circuit board, is characterized in that: human body infrared pyroelectric sensors (PIR1, PIR2) are respectively installed on two planes at an angle of 45 degrees to each other in the plastic shell, A convex lens is installed on the surface of the human body infrared pyroelectric sensor, and the output terminals of two infrared pyroelectric sensors (PIR1, PIR2) are connected to the input pins 7 and 8 of the single-chip microcomputer (AT89C2051) on the circuit board, and the single-chip microcomputer (AT89C2051) The output pin 13 controls the relay through the triode. The utility model better solves the problem that the human body infrared pyroelectric induction switch commonly used at present cannot be used as a long-term control switch. It can not only use the signal of infrared radiation generated by the human body as the switch signal, but also detect the number of the human body. , and automatically turn on and off electrical appliances according to the change of the number of people. It has the characteristics of simple structure, convenient installation and high reliability. It can be used in school classrooms, offices or rooms where people often come and go, and has certain market prospects.

Description

Human body counting electrical switch

technical field

The utility model relates to an electrical switch, in particular to a human counting type electrical switch, which belongs to the field of electrical switches. the

Background technique

At present, most of the well-known human body induction switches are human body infrared pyroelectric induction switches, which use the detection of the presence or absence of infrared radiation generated by the human body as a switch signal, such as corridor lights that control people to turn on when they come, and people to turn off when they leave, automatic doors, electromagnetic switches, etc. valve etc. The human infrared pyroelectric sensor switch has a limited detection distance, generally not more than 10 meters, and it only works within its detection range, and the opening time of lamps, doors and windows, and solenoid valves can only be controlled through a delay circuit. Therefore, the human body infrared pyroelectric sensor switch is a short-term control switch that the human body must be on-site. For places where the human body is no longer on-site and requires long-term control, such as classroom lamps, office air conditioners, etc., this switch Obviously not suitable. the

Contents of the invention

The purpose of this utility model is to solve the problem that the human body infrared pyroelectric sensor switch commonly used at present cannot be used as a long-term control switch. As a switch signal, it can also detect the number of human bodies, and automatically turn on and off electrical appliances according to the change of the number of human bodies. It has the characteristics of simple structure, convenient installation and high reliability. the

The purpose of this utility model is achieved through such a technical scheme: it includes two parts of the plastic shell and the circuit board in structure, and it is characterized in that human body infrared heaters are respectively installed on the two planes of the plastic shell at an angle of 45 degrees to each other. Discharge sensors (PIR1, PIR2), a convex lens is installed on the surface of the infrared pyroelectric sensor of the human body, and the output terminals of the two infrared pyroelectric sensors (PIR1, PIR2) are connected to the input of the single-chip microcomputer (AT89C2051) on the circuit board 7 Pin, 8 pin, the output 13 pin of the single chip microcomputer (AT89C2051) controls the relay through the triode. The working principle of the utility model is: (1) the body counting type electrical switch is installed on the door frame crossbeam of rooms such as classrooms, offices, and the lamp switch and the air conditioner switch of the control cable are connected in series, and then the power is turned on. (2) When someone enters the room from outside the door, the infrared pyroelectric sensor PIR1 on the beam of the door frame detects the human body first, and then PIR2 detects the human body. Processing, the counter advances from "0" to "1" (indicating that there is a person in the room), at this time, pin 13 outputs a high level, the relay pulls in, the power is turned on and reaches the light switch SK1 and the air conditioner switch SK2, as long as the light switch is turned on SK1 or air conditioner switch SK2, lamps and air conditioners can work. (3) When someone enters the room from outside the door, the infrared pyroelectric sensor PIR1 on the door frame beam detects the human body first, and then PIR2 detects the human body. Program processing, the counter advances from "1" to "2" (indicating that there are two people in the room), at this time, pin 13 still maintains a high level, the relay pulls in, and the power is turned on as usual. (4) When someone walks out of the room, the infrared pyroelectric sensor PIR2 on the beam of the door frame detects the human body first, and then PIR1 detects the human body. At this time, the order in which the MCU reads the signals is PIR2 first, then PIR1, and then through the internal program Processing, the counter is reduced from "2" to "1" (indicating that there is another person in the room), at this time, pin 13 still maintains a high level, the relay is closed, and the power is turned on as usual. (5) When someone walks out of the room, the infrared pyroelectric sensor PIR2 on the beam of the door frame detects the human body first, and then PIR1 detects the human body. At this time, the order in which the MCU reads the signals is PIR2 first, then PIR1, and then through the internal program Processing, the counter is reduced from "1" to "0" (indicating that there is no one in the room), at this time, pin 13 outputs a low level, the relay is released, and the power is cut off, even if the person does not turn off the lights or turn off the air conditioner. will automatically turn off. The power is not turned on until the next time a person enters the room. It can be seen that the utility model controls the electrical appliances by counting the number of people entering or leaving the room. When one person enters the room, the counter automatically enters "1", and the counter automatically decreases "1" when one person leaves the room. When the counter is not "0", , the single-chip microcomputer outputs a high level, and the power is turned on through the relay. When the counter is "0", the single-chip microcomputer outputs a low level, and the power is cut off through the relay. In this way, the power supply can be supplied when there are people in the room for a long time, and the power can be cut off when there is no one in the room, so that the lamps and air conditioners work when people come, and the lamps and air conditioners do not work when people leave, so as to achieve the purpose of saving electric energy. the

Due to the adoption of the above technical scheme, the utility model better solves the problem that the human body infrared pyroelectric induction switch commonly used at present cannot be used as a long-term control switch, not only can use the signal of infrared radiation generated by the human body as the switch signal, but It can also detect the number of human bodies, and automatically turn on and off electrical appliances according to changes in the number of human bodies. It has the characteristics of simple structure, convenient installation, and high reliability. It can be used in school classrooms, offices or rooms where people often come and go. Certain market prospects. the

Description of drawings

The accompanying drawings of the utility model are as follows:

Fig. 1 is the installation schematic diagram of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the circuit schematic diagram of the present utility model;

Fig. 4 is a connection diagram of the relay contact K, the lamp switch SK1, and the air conditioner switch SK2. the

Detailed ways

Embodiments of the utility model are further described below in conjunction with the accompanying drawings:

As shown in Fig. 1 and Fig. 2, the utility model is installed on the door frame beams of classrooms, offices and other rooms, and the control cable is connected in series with the lamp switch SKI and the air conditioner switch SK2 of the room, and then the power is turned on. the

As shown in Fig. 3 and Fig. 4, the utility model includes two parts in structure, a plastic shell and a circuit board. Sensor (PIR1, PIR2), convex lens is installed on the surface of described human body infrared pyroelectric sensor, the input 7 pins, 8 pins, the output 13 pins of the microcontroller (AT89C2051) controls the relay through the triode. The working principle of the utility model is: (1) when someone enters the room from outside the door, the infrared pyroelectric sensor PIR1 on the door frame crossbeam first detects the human body, and then PIR2 detects the human body. After PIR1 and PIR2, after the internal program processing, the counter advances from "0" to "1" (indicating that there is a person in the room). At this time, pin 13 outputs high level, the relay pulls in, and the power is turned on to reach the lamp switch SK1 and The air conditioner switch SK2, as long as the lamp switch SK1 or the air conditioner switch SK2 is turned on, the lamp and the air conditioner can work. (2) When someone enters the room from outside the door, the infrared pyroelectric sensor PIR1 on the door frame beam detects the human body first, and then PIR2 detects the human body. Program processing, the counter advances from "1" to "2" (indicating that there are two people in the room), at this time, pin 13 still maintains a high level, the relay pulls in, and the power is turned on as usual. (3) When someone walks out of the room, the infrared pyroelectric sensor PIR2 on the beam of the door frame detects the human body first, and then PIR1 detects the human body. At this time, the order in which the MCU reads the signals is PIR2 first, then PIR1, and then through the internal program Processing, the counter is reduced from "2" to "1" (indicating that there is another person in the room), at this time, pin 13 still maintains a high level, the relay is closed, and the power is turned on as usual. (4) When someone walks out of the room, the infrared pyroelectric sensor PIR2 on the beam of the door frame detects the human body first, and then PIR1 detects the human body. At this time, the order in which the MCU reads the signals is PIR2 first, then PIR1, and then through the internal program Processing, the counter is reduced from "1" to "0" (indicating that there is no one in the room), at this time, pin 13 outputs a low level, the relay is released, and the power is cut off, even if the person does not turn off the lights or turn off the air conditioner. will automatically turn off. The power is not turned on until the next time a person enters the room. It can be seen that the utility model controls the electrical appliances by counting the number of people entering or leaving the room. When one person enters the room, the counter automatically enters "1", and the counter automatically decreases "1" when one person leaves the room. When the counter is not "0", , the single-chip microcomputer outputs a high level, and the power is turned on through the relay. When the counter is "0", the single-chip microcomputer outputs a low level, and the power is cut off through the relay. In this way, the power supply can be supplied when there are people in the room for a long time, and the power can be cut off when there is no one in the room, so that the lamps and air conditioners work when people come, and the lamps and air conditioners do not work when people leave, so as to achieve the purpose of saving electric energy. the

Claims (1)

1. human body counter appliance switch, comprise plastic casing and circuit board two parts, it is characterized in that: on two planes of the mutual miter angle of plastic casing, be separately installed with human body pyroelectric infrared sensor (PIR1, PIR2), in described human body pyroelectric infrared sensor mounted on surface convex lens are arranged, input 7 pin, 8 pin of single-chip microcomputer (AT89C2051) on the output connecting circuit plate of two pyroelectric infrared sensors (PIR1, PIR2), output 13 pin of single-chip microcomputer (AT89C2051) are by the triode control relay.

Images