CN212851137U

CN212851137U - Staircase light control circuit

Info

Publication number: CN212851137U
Application number: CN202021927683.2U
Authority: CN
Inventors: 程保平
Original assignee: Hubei Deda Engineering Technology Co ltd
Current assignee: Hubei Deda Engineering Technology Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-03-30
Anticipated expiration: 2030-09-07

Abstract

The utility model provides a staircase light control circuit, include first controller, second controller, relay switch, photosensitive detection module, install in the first human infrared induction module of stair one end and install in the human infrared induction module of second of the stair other end. The utility model discloses the time of lighting time of steerable staircase light is the same with the time that the pedestrian stopped, avoids appearing the pedestrian and has left and the condition that the light still lighted, has improved energy-conserving effect.

Description

Staircase light control circuit

Technical Field

The utility model relates to a light control technical field especially relates to a staircase light control circuit.

Background

Electricity is closely related to the life of people, and people cannot imagine the life of people without electricity. However, the electric energy is wasted due to improper or unreasonable use in the electricity utilization process, and the waste is often slight and huge. For example, the electricity consumption for lighting in a staircase seems to be negligible, but the electricity consumption is often an energy-saving dead corner and is huge when the electricity consumption is related to thousands of households. At present, most corridor lighting also adopts an energy-saving design, and generally adopts modes such as a sound control mode, a touch control mode, an infrared sensor and the like. The voice control can generate noise pollution due to the need of sound production, and particularly can seriously disturb residents in residential corridors. The touch control method is inconvenient because the touch switch must be found first. The infrared sensor has the best energy-saving effect, but most of the infrared sensors adopt a delayed closing mode, so that the light is closed when the pedestrian does not leave due to insufficient delay, or the light is not closed after the pedestrian leaves due to too long delay, and large electric energy waste exists.

SUMMERY OF THE UTILITY MODEL

In view of this the utility model provides a staircase light control circuit to solve traditional staircase light control circuit and adopt infrared sensor time delay control mode's the poor problem of energy-conserving effect.

The technical scheme of the utility model is realized like this: a staircase light control circuit comprises a first controller, a second controller, a relay switch, a photosensitive detection module, a first human body infrared induction module arranged at one end of a staircase and a second human body infrared induction module arranged at the other end of the staircase;

the relay switch is connected in a power supply line of the staircase illuminating lamp, and the control end of the relay switch is connected with the first controller;

the output ends of the first human body infrared sensing module and the photosensitive detection module are respectively connected with the first controller, the output end of the second human body infrared sensing module is connected with the second controller, and the first controller is in communication connection with the second controller.

Optionally, the second controller has the same circuit structure as the first controller, and the second human body infrared sensing module has the same circuit structure as the first human body infrared sensing module.

Optionally, the first controller includes an STC12C2052 chip, the control end of the relay switch is connected to a P1.0 pin of the STC12C2052 chip, the first human body infrared sensing module is connected to a P3.2 pin of the STC12C2052 chip, and the output end of the photosensitive detection module is connected to a P3.3 pin of the STC12C2052 chip.

Optionally, the first human body infrared sensing module includes an HC-SR501 module and a 74LS14 chip, and an OUT pin of the HC-SR501 module is connected to the first controller through the 74LS14 chip.

Optionally, the photosensitive detection module includes resistors R1-R3, a photosensitive resistor R4 and a comparator U1;

the power VCC is ground through resistance R1, photo resistance R4 in proper order, and the homophase input end of comparator U1 is connected with the common terminal of photo resistance R4 to resistance R1, and the power VCC is ground through resistance R2, resistance R3 in proper order, and comparator U1's inverting input end is connected with the common terminal of resistance R2 and resistance R3, and comparator U1's output is connected first controller.

Optionally, the first controller is in communication connection with the second controller through an RS485 interface.

Optionally, the RS485 interface includes an SN75176 chip U2 and an SN75176 chip U3, and the first controller is connected to the second controller through the SN75176 chip U2 and the SN75176 chip U3 in sequence.

Optionally, the relay switch includes a relay K, a transistor Q1, and a diode D1;

the base of triode Q1 is connected first controller, and the power VCC is in proper order through relay K, triode Q1 ground connection, and during relay K's normally open contact K1 inserted the power supply circuit of staircase light, diode D1 reverse parallel connection was in relay K's both ends.

The utility model discloses a staircase light control circuit has following beneficial effect for prior art:

(1) the photosensitive detection module is used for detecting the illumination intensity of the staircase, if the illumination intensity of the staircase is too high, the photosensitive detection module outputs an illumination detection signal to the first controller, the first controller controls the relay switch to be normally off, and the illuminating lamp is kept in an off state; if the illumination intensity of the staircase is low, the first human body infrared sensing module and the second human body infrared sensing module are respectively used for detecting that a pedestrian enters the corridor and leaves the corridor, when the pedestrian is detected to enter the corridor, the first human body infrared sensing module or the second human body infrared sensing module outputs a detection signal to the first controller or the second controller, the first controller controls the relay switch to be closed, and the illuminating lamp is lightened; when detecting that the pedestrian leaves the corridor, the human infrared induction module of first human infrared induction module or second exports detected signal to first controller or second controller, and the disconnection of first controller control relay switch, and the light is extinguish, and the lighting time of steerable staircase light is the same with the time that the pedestrian stayed like this, avoids appearing the pedestrian and has left and the condition that the light still lighted has improved energy-conserving effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a block diagram of the light control circuit of the staircase according to the present invention;

fig. 2 is a circuit diagram of the staircase light control circuit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1, the staircase light control circuit of this embodiment includes a first controller, a second controller, a relay switch, a photosensitive detection module, a first human infrared sensing module installed at one end of the staircase, and a second human infrared sensing module installed at the other end of the staircase. The power supply circuit of the staircase illuminating lamp is connected with a relay switch, and the control end of the relay switch is connected with a first controller. The output ends of the first human body infrared sensing module and the photosensitive detection module are respectively connected with a first controller, the output end of the second human body infrared sensing module is connected with a second controller, and the first controller is in communication connection with the second controller.

In this embodiment, photosensitive detection module is used for detecting the illumination intensity of stairwell, if the illumination intensity of stairwell is too big, then photosensitive detection module output illumination detected signal to first controller, and relay switch is normally closed in the control of first controller, and the light keeps the state of extinguishing. If the illumination intensity of the staircase is low, the first human body infrared sensing module and the second human body infrared sensing module are respectively used for detecting that a pedestrian enters the corridor and leaves the corridor, when the pedestrian is detected to enter the corridor, the first human body infrared sensing module or the second human body infrared sensing module outputs a detection signal to the first controller or the second controller, the first controller controls the relay switch to be closed, and the illuminating lamp is lightened; when detecting that the pedestrian leaves the corridor, the human infrared induction module of first human infrared induction module or second exports detected signal to first controller or second controller, and the disconnection of first controller control relay switch, and the light is extinguish, and the lighting time of steerable staircase light is the same with the time that the pedestrian stayed like this, avoids appearing the pedestrian and has left and the condition that the light still lighted has improved energy-conserving effect.

Further, in this embodiment, it is preferable that the second controller has the same circuit structure as the first controller, and the second human body infrared sensing module has the same circuit structure as the first human body infrared sensing module. Specifically, as shown in fig. 2, the first controller includes an STC12C2052 chip, the first human body infrared sensing module includes an HC-SR501 module and a 74LS14 chip, and the photosensitive detection module includes resistors R1-R3, a photosensitive resistor R4, and a comparator U1. And the control end of the relay switch is connected with a P1.0 pin of the STC12C2052 chip. And the OUT pin of the HC-SR501 module is connected with the P3.2 pin of the STC12C2052 chip through a 74LS14 chip. The power supply VCC is grounded through a resistor R1 and a photoresistor R4 in sequence, the common end of the resistor R1 and the photoresistor R4 is connected with the non-inverting input end of a comparator U1, the power supply VCC is grounded through a resistor R2 and a resistor R3 in sequence, the common end of the resistor R2 and the resistor R3 is connected with the inverting input end of a comparator U1, and the output end of the comparator U1 is connected with the P3.3 pin of an STC12C2052 chip.

For the first human body infrared sensing module, the HC-SR501 module is an automatic control module based on an infrared technology, and adopts a probe design with high sensitivity, strong reliability and a low-voltage working mode, so that full-automatic sensing can be realized, when a person enters a sensing range, a high level is output, and when the person leaves the sensing range, the high level is automatically delayed and closed, and the low level is output. The triggering mode of the HC-SR501 module is divided into a repeatable triggering mode and a non-repeatable triggering mode, and in the non-repeatable triggering mode, after the high level is output in a sensing mode, the time delay period is finished, and the output is automatically changed from the high level to the low level. When the triggering mode can be repeated, after the high level is output by sensing, in a delay time period, if a human body moves in the sensing range, the output of the human body keeps the high level all the time, and the high level is changed into the low level in a delayed manner until the human body leaves. The module also has induction blocking time, when the induction module outputs induction each time, a blocking time period can be set next, and the inductor does not receive any induction signal in the blocking time period, so that the function can effectively inhibit various interferences generated in the process of load switching. When the HC-SR501 module senses the activity of a human body, the output high level is reversed by the 74LS14 chip to trigger the STC12C2052 chip, a pin at the P3.2 end of the STC12C2052 chip generates level jump, and the STC12C2052 chip responds by using external interruption to complete the detection and recording of signals. The second human body infrared induction module has the same working process as the first human body infrared induction module.

For the photosensitive detection module, when the illumination is strong, the resistance of the photosensitive resistor R4 is small, and when the illumination is weak, the resistance of the photosensitive resistor R4 is large. When the illumination of the staircase is strong, the resistance values of the resistors R1-R3 can be set, so that the divided voltage of the photosensitive resistor R4 is smaller than the divided voltage of the resistor R3, the comparator U1 outputs a low level to trigger the STC12C2052 chip, and the STC12C2052 chip can control the relay switch to keep an off state; . When the illumination of the staircase is weak, the partial voltage of the photoresistor R4 is larger than that of the resistor R3, the comparator U1 outputs a high level to the first controller STC12C2052 chip, and the first controller STC12C2052 chip starts to process the human body detection signal.

Further, in this embodiment, preferably, the first controller is in communication connection with the second controller through an RS485 interface. Specifically, as shown in fig. 2, the RS485 interface includes SN75176 chip U2 and SN75176 chip U3, pins P3.0 and P3.1 of the STC12C2052 chip of the first controller are respectively connected to pin R, D of SN75176 chip U3, pin P3.7 of the STC12C2052 chip of the first controller is simultaneously connected to pin RE and pin DE of SN75176 chip U3, pin B, A of SN75176 chip U3 is respectively connected to pin B, A of SN75176 chip U2, pins P3.0 and P3.1 of the STC12C2052 chip of the second controller are respectively connected to pin R, D of SN75176 chip U2, and pin P3.7 of the STC12C2052 chip of the second controller is simultaneously connected to pin RE and pin DE of SN75176 chip U2.

As shown in fig. 2, the relay switch of the present embodiment includes a relay K, a transistor Q1, and a diode D1. The base electrode of the triode Q1 is connected with a P1.0 pin of an STC12C2052 chip of the first controller, a power supply VCC is sequentially grounded through a relay K and the triode Q1, a normally open contact K1 of the relay K is connected into a power supply circuit of the staircase lighting lamp, and a diode D1 is reversely connected with two ends of the relay K in parallel. When an STC12C2052 chip of the first controller receives a low level output by a 74LS14 chip, a high level is output through a P1.0 pin, a triode Q1 is controlled to be conducted, a coil of a relay K is electrified, a normally open contact K1 is closed, and a power supply circuit of an illuminating lamp is conducted; when the STC12C2052 chip of the second controller receives the high level output by the 74LS14 chip, the STC12C2052 chip of the second controller communicates with the STC12C2052 chip of the first controller, so that the P1.0 pin of the STC12C2052 chip of the first controller outputs a low level, the triode Q1 is controlled to be turned off, the coil of the relay K is powered off, the normally open contact K1 is disconnected, and the power supply circuit of the illuminating lamp is cut off. Diode D1 can be used as the discharge circuit when the coil of relay K is changed from on to off, preventing high voltage from damaging the circuit.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A staircase light control circuit is characterized by comprising a first controller, a second controller, a relay switch, a photosensitive detection module, a first human body infrared induction module arranged at one end of a staircase and a second human body infrared induction module arranged at the other end of the staircase;

2. A staircase light control circuit as defined in claim 1, wherein the second controller has the same circuit configuration as the first controller, and the second human body infrared sensing module has the same circuit configuration as the first human body infrared sensing module.

3. The staircase light control circuit of claim 1, wherein the first controller comprises an STC12C2052 chip, the control terminal of the relay switch is connected to a P1.0 pin of the STC12C2052 chip, the first human body infrared sensing module is connected to a P3.2 pin of the STC12C2052 chip, and the output terminal of the photosensitive detection module is connected to a P3.3 pin of the STC12C2052 chip.

4. The staircase light control circuit of claim 1 wherein the first human infrared sensing module comprises a HC-SR501 module and a 74LS14 chip, the OUT pin of the HC-SR501 module being connected to the first controller via a 74LS14 chip.

5. The staircase light control circuit of claim 1 wherein the light sensitive detection module includes resistors R1-R3, a light sensitive resistor R4 and a comparator U1;

6. A staircase light control circuit as defined in claim 1, wherein the first controller is communicatively connected to the second controller via an RS485 interface.

7. The staircase light control circuit of claim 6 wherein the RS485 interface includes SN75176 chip U2 and SN75176 chip U3, the first controller in turn being connected to the second controller via SN75176 chip U2 and SN75176 chip U3.

8. The staircase light control circuit of claim 1 wherein the relay switch comprises relay K, transistor Q1 and diode D1;