CN212851133U

CN212851133U - Intelligent light adjusting circuit for underground garage

Info

Publication number: CN212851133U
Application number: CN202021928511.7U
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 an underground garage light intelligent regulation circuit, including infrared pyroelectric sensor, first homophase amplifier, band-pass amplifier, first comparator and relay switch. The utility model discloses the band-pass amplifier of second level has been added in infrared pyroelectric sensor's output signal processing circuit, can filter clutter or noise except effective frequency band, improves the accuracy of response human signal, avoids the false switch of light.

Description

Intelligent light adjusting circuit for underground garage

Technical Field

The utility model relates to a light intelligent regulation technical field especially relates to an underground garage light intelligent regulation circuit.

Background

Underground garages generally do not have natural light illumination and need lamplight illumination. The control mode of traditional underground garage light regulating circuit is that all lights are normally opened, and even if there is vehicle and personnel to get into, the light of other everywhere outside vehicle and personnel position also normally opens like this very big waste the electric energy when no vehicle and personnel get into. At present, an adjusting circuit for controlling the switch of the illuminating lamp by sensing a human body signal through a pyroelectric infrared sensor appears, and the voltage output by the pyroelectric infrared sensor is amplified and then compared with a set threshold value to control the on-off of the illuminating lamp, so that the electric energy can be greatly saved. Because the output of the pyroelectric infrared sensor contains a plurality of clutter, the detection accuracy of human body signals is interfered, and the lighting lamp is switched on and off by mistake.

SUMMERY OF THE UTILITY MODEL

In view of this the utility model provides an underground garage light intelligent regulation circuit to solve the problem that traditional underground garage light regulating circuit detects human signal's accuracy is low.

The technical scheme of the utility model is realized like this: an intelligent lamplight adjusting circuit for an underground garage comprises a single chip microcomputer, an infrared pyroelectric sensor, a first in-phase amplifier, a band-pass amplifier, a first comparator and a relay switch;

the output end of the infrared pyroelectric sensor is connected with the non-inverting input end of the first comparator through the first non-inverting amplifier and the band-pass amplifier in sequence, the inverting input end of the first comparator is connected with a set reference voltage Vref1, and the output end of the first comparator is connected with the singlechip;

the relay switch is connected in a power supply line of the underground garage illuminating lamp, and the control end of the relay switch is connected with the single chip microcomputer.

Optionally, the infrared pyroelectric sensor is a KDS9 module, and the single chip microcomputer includes an STC89C52 chip.

Optionally, the band-pass amplifier includes resistors R1-R4, capacitors C1-C2, and an operational amplifier U1;

the output end of the first non-inverting amplifier is sequentially connected with the inverting input end of an operational amplifier U1 through a capacitor C1 and a resistor R1, a power supply VCC is sequentially grounded through a resistor R2 and a resistor R3, the common end of the resistor R2 and the resistor R3 is connected with the non-inverting input end of the operational amplifier U1, the output end of the operational amplifier U1 is further connected with the inverting input end of the operational amplifier U1 through a resistor R4, the capacitor C2 is connected with the resistor R4 in parallel, and the output end of the operational amplifier U1 is further connected with the non-inverting input end of the first comparator.

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

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

Optionally, underground garage light intelligent regulation circuit still includes sound detection module, sound detection module's output is connected the singlechip, the singlechip is receiving control when the high level of sound detection module output relay switch is closed, is receiving first comparator reaches control when the low level of sound detection module output relay switch disconnection.

Optionally, the sound detection module includes an electret microphone, a second in-phase amplifier, and a second comparator;

the output end of the electret microphone is connected with the inverting input end of the second comparator through the second in-phase amplifier, the non-inverting input end of the second comparator is connected with a set reference voltage Vref2, and the output end of the second comparator is connected with the single chip microcomputer.

Optionally, the sound detection module further includes a third non-inverting amplifier, and the third non-inverting amplifier is connected between the output end of the second non-inverting amplifier and the inverting input end of the second comparator.

The utility model discloses an underground garage light intelligent regulation circuit has following beneficial effect for prior art:

(1) the utility model adds the second-stage band-pass amplifier in the output signal processing circuit of the infrared pyroelectric sensor, which can filter out clutter or noise except effective frequency band, improve the accuracy of sensing human body signals and avoid false switching of the illuminating lamp;

(2) the sensitivity of the infrared pyroelectric sensor is reduced due to the shielding effect of the motor vehicle on human body signals, the utility model combines the noise generated by the detection of the motor vehicle by the sound detection module to control the on-off of the illuminating lamp, and makes up the defect of low sensitivity when the infrared pyroelectric sensor detects the entry of the motor vehicle;

(3) the utility model discloses a two-stage in-phase amplifier enlargies the output of electret microphone, can restrain common mode signal, obtains higher input impedance simultaneously.

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 structural block diagram of the intelligent light adjusting circuit for an underground garage of the present invention;

fig. 2 is the utility model discloses an underground garage light intelligent regulation circuit's circuit diagram.

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 intelligent adjusting circuit for the underground garage light of the embodiment includes an infrared pyroelectric sensor, a first in-phase amplifier, a band-pass amplifier, a first comparator and a relay switch. The output end of the infrared pyroelectric sensor is connected with the non-inverting input end of a first comparator through a first non-inverting amplifier and a band-pass amplifier in sequence, the inverting input end of the first comparator is connected with a set reference voltage Vref1, and the output end of the first comparator is connected with the single chip microcomputer. The power supply circuit of the underground garage illuminating lamp is connected with a relay switch, the control end of the relay switch is connected with the single chip microcomputer, the single chip microcomputer controls the relay switch to be closed when receiving the high level output by the first comparator, and controls the relay switch to be disconnected when receiving the low level output by the first comparator.

As shown in fig. 1, the pyroelectric infrared sensor, the first in-phase amplifier, the band-pass amplifier and the first comparator of the present embodiment constitute a human body infrared sensing module. The infrared pyroelectric sensor is a KDS9 module, the single chip microcomputer comprises an STC89C52 chip, and the output end of the first comparator is connected with a P3 port of the STC89C52 chip. As shown in FIG. 2, the band-pass amplifier includes resistors R1-R4, capacitors C1-C2, and an operational amplifier U1. The output end of the first non-inverting amplifier is sequentially connected with the inverting input end of the operational amplifier U1 through a capacitor C1 and a resistor R1, a power supply VCC is sequentially grounded through a resistor R2 and a resistor R3, the common end of the resistor R2 and the resistor R3 is connected with the non-inverting input end of the operational amplifier U1, the output end of the operational amplifier U1 is further connected with the inverting input end of the operational amplifier U1 through a resistor R4, a capacitor C2 is connected with the resistor R4 in parallel, and the output end of the operational amplifier U1 is further connected with the non-inverting input end of the first comparator. The KDS9 module is used for sensing human body infrared signals, when a person exists in the sensing range of the KDS9 module, the KDS9 module outputs a high level, the high level is amplified by the first homophase amplifier and the band-pass amplifier and then input to the non-inverting input end of the first comparator, the reference voltage Vref1 can be set to be smaller than the output voltage of the band-pass amplifier, therefore, the first comparator outputs a high level to the P3 port of the STC89C52 chip, and the STC89C52 chip controls the lighting of the illuminating lamp. When no person exists in the sensing range of the KDS9 module, the KDS9 module outputs a low level, and the first comparator outputs a low level to the P3 port of the STC89C52 chip. Because the output of the KDS9 module is a low-frequency alternating signal (the effective frequency band is about 1 Hz), and contains a lot of clutter, the embodiment adds a second-stage band-pass amplifier, which can filter clutter or noise except the effective frequency band, improve the accuracy of sensing human body signals, and avoid false switching of the illuminating lamp. The band-pass amplifier is designed for inverting amplification, and VCC/2 bias is added to the non-inverting input end of the band-pass amplifier to ensure that the amplified output voltage is positive.

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 the P1 port of the STC89C52 chip, the power VCC is sequentially grounded through the relay K and the triode Q1, the normally open contact K1 of the relay K is connected into the power supply circuit of the illuminating lamp of the underground garage, and the diode D1 is reversely connected in parallel at two ends of the relay K. When the STC89C52 chip receives the high level output by the first comparator or the sound detection module, the high level is output through a pin at the P1 end, the triode Q1 is controlled to be conducted, the coil of the relay K is electrified, the normally open contact K1 is closed, and the power supply circuit of the illuminating lamp is conducted; when the STC89C52 chip receives the low level of first comparator and sound detection module output, through P1 end pin output low level, control triode Q1 shuts off, and relay K's coil cuts off the power supply, and normally open contact K1 disconnection, the power supply line of light cuts 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.

As shown in fig. 1, the preferable underground garage light intelligent regulation circuit of this embodiment also includes sound detection module, and the singlechip is connected to sound detection module's output, and the singlechip controls relay switch closed when receiving the high level of sound detection module output, controls relay switch disconnection when receiving the low level of first comparator and sound detection module output. Due to the shielding effect of the motor vehicle on human body signals, the sensitivity of the infrared pyroelectric sensor is reduced when the motor vehicle enters an underground garage. In this embodiment, when the motor vehicle got into underground garage, the motor vehicle can produce the noise, can set up the noise that the motor vehicle can produce and be greater than the settlement threshold value, then sound detection module output a high level, and the singlechip receives this high level after control relay switch closure, switches on the power supply line of light, and the light is lighted. When no pedestrian exists in the sensing range of the infrared pyroelectric sensor, the infrared pyroelectric sensor outputs a low level, the first comparator outputs a low level, when no motor vehicle enters a local garage, a sound signal in the environment is smaller than a set threshold value, the sound detection module also outputs a low level, the single chip microcomputer receives the low level output by the first comparator and the sound detection module and then controls the relay switch to be switched off, a power supply circuit of a bright lamp is cut off, and the illuminating lamp is turned off. The on-off of light is controlled to accessible sound detection module detection motor vehicle's noise like this, has compensatied the defect that sensitivity is low when infrared pyroelectric sensor detects the motor vehicle and gets into.

Specifically, as shown in fig. 2, the sound detection module includes an electret microphone, a second non-inverting amplifier, and a second comparator. The output end of the electret microphone is connected with the inverting input end of a second comparator through a second non-inverting amplifier, the non-inverting input end of the second comparator is connected with a set reference voltage Vref2, and the output end of the second comparator is connected with the P2 port of an STC89C52 chip. The signal picked up by the electret microphone is negative, so that the noise is higher, the output of the electret microphone is smaller, therefore, when the motor vehicle enters an underground garage, the electret microphone outputs a low level, the low level is output after being amplified by the second in-phase amplifier, the reference voltage Vref2 can be set to be larger than the output voltage of the second in-phase amplifier, so that the second comparator outputs a high level to a P2 port of an STC89C52 chip, and the STC89C52 chip controls the lighting of the illuminating lamp. When no motor vehicle enters, the electret microphone outputs a high level, and the second comparator outputs a low level to the P2 port of the STC89C52 chip.

As shown in fig. 1, the sound detection module of this embodiment preferably further includes a third non-inverting amplifier, and the third non-inverting amplifier is connected between the output terminal of the second non-inverting amplifier and the inverting input terminal of the second comparator. In the embodiment, the output of the electret microphone is amplified through the two-stage amplifying circuit, common-mode signals can be restrained, the amplification factor of the second in-phase amplifier cannot be set to be too large, interference signals are reduced to enter an amplifying channel, and meanwhile, two-stage in-phase proportion amplification is adopted for obtaining higher input impedance.

It should be noted that the first, second, and third non-inverting amplifiers of the present embodiment are all common circuit structures, and are not described in detail here.

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. The intelligent lamplight adjusting circuit for the underground garage is characterized by comprising a single chip microcomputer, an infrared pyroelectric sensor, a first in-phase amplifier, a band-pass amplifier, a first comparator and a relay switch;

2. The intelligent underground garage light adjusting circuit of claim 1, wherein the infrared pyroelectric sensor is a KDS9 module, and the single chip microcomputer comprises an STC89C52 chip.

3. The intelligent light regulating circuit for the underground garage according to claim 1, wherein the band-pass amplifier comprises resistors R1-R4, capacitors C1-C2 and an operational amplifier U1;

4. The intelligent underground garage light regulating circuit as claimed in claim 1, wherein the relay switch comprises a relay K, a transistor Q1 and a diode D1;

5. The intelligent underground garage light regulating circuit according to claim 1, further comprising a sound detection module, wherein an output end of the sound detection module is connected to the single chip microcomputer, the single chip microcomputer controls the relay switch to be closed when receiving a high level output by the sound detection module, and controls the relay switch to be opened when receiving a low level output by the first comparator and the sound detection module.

6. The intelligent underground garage light adjustment circuit of claim 5, wherein the sound detection module comprises an electret microphone, a second non-inverting amplifier, and a second comparator;

7. The intelligent underground garage light adjustment circuit of claim 6, wherein the sound detection module further comprises a third non-inverting amplifier connected between the output of the second non-inverting amplifier and the inverting input of the second comparator.