CN204906791U - Light automatic control - Google Patents

Abstract

The utility model relates to an automatic light controller, which belongs to the technical field of energy saving and environmental protection. The utility model includes a PLC, a human body pyroelectric sensor, an illumination sensor, an intermediate relay, an AC contactor, a fluorescent lamp, and a manual control switch; wherein the output signal detected by the human body pyroelectric sensor is connected with the corresponding I/O interface of the PLC, and the illumination sensor detects The output signal of the PLC is connected to the corresponding I/O interface of the PLC, and the PLC is connected to the intermediate relay to drive the intermediate relay. Connect the fluorescent lamp circuit in parallel. According to the number of people reading and studying in the classroom or self-study room and the brightness of light, the utility model automatically controls the number of lights in the room to be turned on, so as to achieve the utilization of lights and save resources; it adopts PLC sequence control to reduce the workload of management personnel and make resources available. Make full use of it to achieve the purpose of energy saving and environmental protection.

Description

A light automatic controller

technical field

The utility model relates to an automatic light controller, which belongs to the technical field of energy saving and environmental protection.

Background technique

For the management and use of lighting in university classrooms and library self-study rooms at this stage. For example, irregular light switches lead to serious waste of electrical energy. And in all kinds of colleges and universities in China, due to the weak awareness of energy conservation among students, the lights are turned on when the light is strong enough. Sometimes there are only a few people in the study room, but all the lights are turned on. After the students leave the classroom or study room, The phenomenon that indoor lights are still on is common; moreover, the energy-saving planning is extremely lacking, and the lighting control of classrooms is manually replaced by management personnel. loss.

In response to our party's "Proposals of the Central Committee of the Communist Party of China on Formulating the Tenth Five-Year Plan for National Economic and Social Development" adopted as early as October 11, 2000, it was clearly pointed out that it emphasized that energy construction should take advantage of resources and optimize the energy structure. , improve utilization efficiency.

Contents of the invention

The utility model provides an automatic light controller, which is used to solve the problem that a large number of personnel are required for the management of indoor light equipment in existing libraries and self-study rooms, and the indoor light cannot be turned off in time, resulting in serious waste of electric energy resources.

The technical scheme of the utility model is: an automatic light controller, including PLC1, human body pyroelectric sensor 2, illuminance sensor 3, intermediate relay 4, AC contactor 5, fluorescent lamp 6, manual control switch 8; The output signal detected by the electrical sensor 2 is connected to the corresponding I/O interface of PLC1, the output signal detected by the illuminance sensor 3 is connected to the corresponding I/O interface of PLC1, and the PLC1 is connected to the intermediate relay 4 to drive the intermediate relay 4 and the contact of the intermediate relay 4 To control the AC contactor 5 coil on and off, the AC contactor 5 is connected to the fluorescent lamp 6, and the manual control switch 8 is connected to the fluorescent lamp 5 circuit in parallel.

Also includes a touch screen 7, the touch screen 7 is connected to the programming port position of PLC1.

The PLC1 is a FX2N-64MR small PLC, the human body pyroelectric sensor 2 is a switch type human body pyroelectric sensor, and the illumination sensor 3 is a switch type illumination sensor.

The touch screen 7 is a GT1575-VTBA Mitsubishi touch screen.

The working principle of the utility model is:

First of all, when the circuits are all connected, the working time of the controller is 24h continuous work, and the system's control time for the lights is set as the opening time of the library and self-study room: the initial setting time period of this controller It is: 7:30—21:30, ①The controller will first determine whether it is the opening time, if it is not the opening time period, PLC1 drives the intermediate relay 4, and then uses the contact of the intermediate relay 4 to control the power-off of the coil of the AC contactor 5 , so that KM0 is disconnected, and all the indoor fluorescent lamps 6 are extinguished.

②Because most of the time period is daytime and there is sunlight, the illuminance sensor 3 will judge the brightness of the four areas (four locations in the room). In rainy or cloudy days or when there is insufficient light at night, and the illuminance sensor in a certain area detects that the illuminance value is at least 300Lx, the illuminance sensor 3 outputs a signal to allow the light to be turned on to PLC1.

③According to the human body pyroelectric sensor 2 to determine whether there are people in each area, when someone is sitting in a certain area, the human body will emit heat radiation, the human body pyroelectric sensor 2 will sense the heat radiation signal, and the human body pyroelectric sensor 2 will output Allow to turn on the light signal to PLC1.

④ When the human body pyroelectric sensor 2 and the illuminance sensor 3 simultaneously output the signal to PLC1 to allow the light to be turned on during the open time, the fluorescent lamp 6 in the corresponding area will be turned on. The entire controller makes full use of natural resources, sunlight and electricity, while ensuring students' study and work, so as to achieve the purpose of energy saving and environmental protection.

⑤ In special cases, it can be switched to the touch screen mode, and the touch screen 7-human-computer interaction mode controls the indoor lighting, or when there are special needs (when the PLC fails), the indoor fluorescent lamp 6 is controlled through the manual control switch 8, that is SB1, SB2, SB3, and SB4 in the wiring schematic diagram correspond to the control of the four area lights respectively. SB0 is the main control switch. Since it is connected in parallel, when PLC1 cannot work normally, it does not affect the use of the manual control switch.

In the actual operation process, the PLC controls the number and position of lights on according to the position of the people studying in the classroom or study room measured by the switch-type human body pyroelectric sensor and the brightness of the four indoor positions measured by the brightness sensor.

Reference [1] mentions that "the PLC collects the output signal of the liquid level sensor in real time, obtains and records the liquid level value in the Marlson jar and the runoff bottle through analog/digital conversion; and controls the opening and closing of the solenoid valve according to the liquid level of the Martens jar Realize the automatic water replenishment of the Martens bottle." The same principle as "PLC collects the output signals of the human body pyroelectric sensor and the illuminance sensor in real time to realize the automatic control of the indoor light" in this patent shows that it is a common method.

Literature [1]: Lu Huafang, Yang Hanbo, Cong Zhentao, Lei Huimin. Indoor rainfall infiltration automatic measurement system based on PLC control [J]. Journal of Agricultural Machinery, 2014, 45 (9): 145-160.

As shown in Figure 4, part of the I/O port distribution diagram in the PLC main wiring diagram, illuminance sensor 3: X007 corresponds to I/O interface X34 area 1 switch type illuminance sensor; X007 corresponds to I/O interface X35 area 2 switch type illuminance sensor ; X008 corresponds to I/O interface X36 area 3 switch type illuminance sensor; X009 corresponds to I/O interface X36 area 3 switch type illuminance sensor; X010 corresponds to I/O interface X37 area 4 switch type illuminance sensor. Human body pyroelectric sensor 2: X011 corresponds to I/O interface X30 area 1 human body pyroelectric sensor; X012 corresponds to I/O interface X31 area 2 human body pyroelectric sensor; X013 corresponds to I/O interface X32 area 3 human body pyroelectric sensor Sensor; X014 corresponds to the human body pyroelectric sensor in area 4 of I/O interface X33.

As shown in Figure 7, the lighting control ladder diagram of the automatic lighting controller, the lighting control is mainly through the counters C10 and C210 and the internal clock pulse relay M8014 to complete the judgment of the opening time period of the university classrooms and library self-study rooms, and at the same time realize 24 hours One cycle, when it is first turned on at 7:30 in the morning, the opening time is from 7:30 to 21:30, and the specific opening time can be set directly by adjusting K840 and K1440 in the program. And through the illuminance sensor 3 and the human body pyroelectric sensor 2 to determine the brightness of each area and whether there are people to determine whether to turn on the electric lights in this area, so as to make full use of natural resources (sunshine) and electric energy. In addition, there is manual all-off control, which will not be repeated here.

Among them, the selected new switch type illumination sensor 3 model is ON9668, a total of four. The sensor integrates dual photosensitive element + amplification + logic + switch + power drive function, basically without peripheral circuits, can directly output high and low levels, and the output current is up to 30mA, which can directly drive LEDs, incandescent lamps, and relays. The internal logic of ON9668 is set to 20% illuminance hysteresis, which can prevent the output of points near the light threshold from jumping, corresponding to the Adj pin voltage of 1.2-1.6V. Its working logic is: when the incident light intensity does not reach the set threshold, the Adj pin voltage changes proportionally with the light intensity, and the Out terminal maintains the original low level. When the Adj pin voltage reaches 1.2V, the Out terminal continues to maintain the original low level. ; The light continues to increase, and when the voltage of the Adj pin rises to 1.6V, the Out terminal changes from low level to high level (the relay coil is powered off); when the incident light continues to increase, Adj will be locked by 1.6V, and only the light is controlled by Strong to weak, when the Adj terminal voltage is less than or equal to 1.2V, the Out terminal will change from high level to low level (the relay coil is energized). The design of this hysteresis circuit can prevent the output from jittering when the light is on the threshold point, effectively solving the flicker problem.

Illuminance is a physical quantity that indicates the degree to which an object is illuminated. Illuminance is related to the light source, the surface of the illuminated object, and the spatial position of the light source. It can be directly measured with an illuminance meter. The illuminance meter is based on the photoelectric effect, which converts light signals into electrical signals. According to national and international illuminance standards, the minimum average illuminance value of a school classroom is 300Lx. Therefore, adjust the resistance value of RP of ON9668, and set the light threshold value to 300Lx.

The human body pyroelectric sensor 2 can be selected, the human body induction module of Shenzhen Xinboxing Technology Co., Ltd., model: SP-003; the intermediate relay 4 can be selected from the Takamizawa relay of TAKAMISAWA company, the model is: NY24W-K, 4 pins 5A It is dedicated to Mitsubishi PLC; the optional AC contactor 5 model is CJX2-0910; most of the other models have been given together with the name, and some of them are common products on the market, so there is no need to fix the specific model.

The beneficial effect of the utility model is: according to the number of people reading and studying in the classroom or self-study room and the brightness of the light, the number of lights in the room is automatically controlled, so as to achieve the utilization of lights and save resources. And the touch screen is used as the human-computer interaction interface, which is convenient for operation and maintenance, beautiful and elegant, and avoids the danger of electric shock caused by direct contact between people and equipment. PLC sequence control is adopted to realize automatic and intelligent control of classroom lighting, reduce the workload of management personnel, make full use of resources, and achieve the purpose of energy saving and environmental protection.

Description of drawings

Fig. 1 is a connection block diagram of the components of the utility model;

Fig. 2 is the schematic diagram of the lighting control main wiring of the utility model;

Fig. 3 is the schematic diagram of the lighting control main wiring of the utility model;

Fig. 4 is the part I/O port allocation diagram in the general wiring diagram of PLC of the present utility model;

Fig. 5 is a schematic diagram of the utility model according to the sensor;

Fig. 6 is the schematic diagram of wiring of the human body pyroelectric sensor of the present invention;

Fig. 7 is the ladder diagram of lighting control of the utility model;

Each label in the figure: 1-PLC; 2-human pyroelectric sensor; 3-illuminance sensor; 4-intermediate relay; 5-AC contactor; 6-fluorescent lamp; 7-touch screen, 8-manual control switch.

Detailed ways

Embodiment 1: As shown in Figures 1-7, an automatic lighting controller includes PLC1, human body pyroelectric sensor 2, illuminance sensor 3, intermediate relay 4, AC contactor 5, fluorescent lamp 6, and manual control switch 8; Among them, the output signal detected by the human pyroelectric sensor 2 is connected to the corresponding I/O interface of PLC1, the output signal detected by the illuminance sensor 3 is connected to the corresponding I/O interface of PLC1, and the PLC1 is connected to the intermediate relay 4 to drive the intermediate relay 4, the intermediate relay 4 contacts to control the AC contactor 5 coil on and off, the AC contactor 5 is connected to the fluorescent lamp 6, and the manual control switch 8 is connected to the fluorescent lamp 5 circuit in parallel.

Also includes a touch screen 7, the touch screen 7 is connected to the programming port position of PLC1.

The PLC1 is a FX2N-64MR small PLC, the human body pyroelectric sensor 2 is a switch type human body pyroelectric sensor, and the illumination sensor 3 is a switch type illumination sensor.

The touch screen 7 is a GT1575-VTBA Mitsubishi touch screen.

Embodiment 2: As shown in Figures 1-7, an automatic lighting controller includes a PLC1, a human body pyroelectric sensor 2, an illumination sensor 3, an intermediate relay 4, an AC contactor 5, a fluorescent lamp 6, and a manual control switch 8; Among them, the output signal detected by the human pyroelectric sensor 2 is connected to the corresponding I/O interface of PLC1, the output signal detected by the illuminance sensor 3 is connected to the corresponding I/O interface of PLC1, and the PLC1 is connected to the intermediate relay 4 to drive the intermediate relay 4, the intermediate relay 4 contacts to control the AC contactor 5 coil on and off, the AC contactor 5 is connected to the fluorescent lamp 6, and the manual control switch 8 is connected to the fluorescent lamp 5 circuit in parallel.

Also includes a touch screen 7, the touch screen 7 is connected to the programming port position of PLC1.

The PLC1 is a FX2N-64MR small PLC, the human body pyroelectric sensor 2 is a switch type human body pyroelectric sensor, and the illumination sensor 3 is a switch type illumination sensor.

Embodiment 3: As shown in Figures 1-7, an automatic lighting controller includes PLC1, human body pyroelectric sensor 2, illuminance sensor 3, intermediate relay 4, AC contactor 5, fluorescent lamp 6, and manual control switch 8; Among them, the output signal detected by the human pyroelectric sensor 2 is connected to the corresponding I/O interface of PLC1, the output signal detected by the illuminance sensor 3 is connected to the corresponding I/O interface of PLC1, and the PLC1 is connected to the intermediate relay 4 to drive the intermediate relay 4, the intermediate relay 4 contacts to control the AC contactor 5 coil on and off, the AC contactor 5 is connected to the fluorescent lamp 6, and the manual control switch 8 is connected to the fluorescent lamp 5 circuit in parallel.

The PLC1 is a FX2N-64MR small PLC, the human body pyroelectric sensor 2 is a switch type human body pyroelectric sensor, and the illumination sensor 3 is a switch type illumination sensor.

Embodiment 4: As shown in Figure 1-7, an automatic lighting controller includes PLC1, human body pyroelectric sensor 2, illuminance sensor 3, intermediate relay 4, AC contactor 5, fluorescent lamp 6, and manual control switch 8; Among them, the output signal detected by the human pyroelectric sensor 2 is connected to the corresponding I/O interface of PLC1, the output signal detected by the illuminance sensor 3 is connected to the corresponding I/O interface of PLC1, and the PLC1 is connected to the intermediate relay 4 to drive the intermediate relay 4, the intermediate relay 4 contacts to control the AC contactor 5 coil on and off, the AC contactor 5 is connected to the fluorescent lamp 6, and the manual control switch 8 is connected to the fluorescent lamp 5 circuit in parallel.

Also includes a touch screen 7, the touch screen 7 is connected to the programming port position of PLC1.

Embodiment 5: As shown in Figures 1-7, an automatic lighting controller includes PLC1, human body pyroelectric sensor 2, illuminance sensor 3, intermediate relay 4, AC contactor 5, fluorescent lamp 6, and manual control switch 8; Among them, the output signal detected by the human pyroelectric sensor 2 is connected to the corresponding I/O interface of PLC1, the output signal detected by the illuminance sensor 3 is connected to the corresponding I/O interface of PLC1, and the PLC1 is connected to the intermediate relay 4 to drive the intermediate relay 4, the intermediate relay 4 contacts to control the AC contactor 5 coil on and off, the AC contactor 5 is connected to the fluorescent lamp 6, and the manual control switch 8 is connected to the fluorescent lamp 5 circuit in parallel.

The specific implementation of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned implementation. Various changes are made.

Claims (4)

1. An automatic lighting controller, characterized in that it includes PLC (1), human body pyroelectric sensor (2), illuminance sensor (3), intermediate relay (4), AC contactor (5), fluorescent lamp (6 ), the manual control switch (8); wherein the output signal detected by the human pyroelectric sensor (2) is connected to the corresponding I/O interface of the PLC (1), and the output signal detected by the illumination sensor (3) is connected to the corresponding I/O interface of the PLC (1) /O interface is connected, PLC (1) is connected with the intermediate relay (4), drives the intermediate relay (4), the contacts of the intermediate relay (4) control the AC contactor (5) coil on and off, and the AC contactor (5) ) is connected with the fluorescent lamp (6), and the manual control switch (8) is connected with the fluorescent lamp (5) circuit in parallel. 2. The automatic lighting controller according to claim 1, characterized in that it further comprises a touch screen (7), and the touch screen (7) is connected to the programming port of the PLC (1). 3. The automatic lighting controller according to claim 1 or 2, characterized in that: the PLC (1) is a small PLC FX2N-64MR, and the human body pyroelectric sensor (2) is a switch type human body pyroelectric sensor , The illuminance sensor (3) is a switch-type illuminance sensor. 4. The automatic lighting controller according to claim 2, characterized in that: the touch screen (7) is a GT1575-VTBA Mitsubishi touch screen.