CN218335988U

CN218335988U - Street lamp time delay drive circuit

Info

Publication number: CN218335988U
Application number: CN202221701422.8U
Authority: CN
Inventors: 李长建; 孙异兴
Original assignee: Chongqing Resonance Electronics Co ltd
Current assignee: Chongqing Resonance Electronics Co ltd
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2023-01-17
Anticipated expiration: 2032-07-04

Abstract

The utility model relates to an electronic circuit technical field specifically discloses a street lamp time delay drive circuit, including control circuit, control circuit 'S output and mos field effect transistor' S G utmost point are connected, charging element 'S positive pole and mos field effect transistor' S G utmost point are connected, charging element 'S negative pole and mos field effect transistor' S S utmost point are all ground connection, connect sixth resistance between charging element 'S positive pole and power, illuminance sensing element is used for the response illuminance and whether surpasses the threshold value, if illuminance does not surpass the threshold value, then control circuit output low level, mos field effect transistor' S G is low level, mos field effect transistor 'S D utmost point is high level, the DIM signal maintains high level, the street lamp lasts to light, if illuminance surpasss the threshold value, control circuit disconnection, the power supplies power for charging element through sixth resistance, it lasts to reach mos field effect transistor' S the threshold value of switching on to reach until charging element voltage, mos field effect transistor switches on, the DIM signal draws low, the street lamp extinguishes. The street lamp time delay driving circuit has the function of preventing misoperation.

Description

Street lamp time delay drive circuit

Technical Field

The utility model relates to an electronic circuit technical field, concretely relates to street lamp time delay drive circuit.

Background

With the development of intelligent technology, various aspects of people's daily life are developing towards intellectualization, and especially, in order to facilitate people's life, energy is saved, and some public facilities gradually tend to be intellectualized. At present, outdoor lighting lamps such as street lamps are more and more intelligent, and switches of the lamps are mostly controlled intelligently, namely, the lamps can be intelligently switched along with the change of external illumination brightness. However, at present, the intelligent switch of the street lamp has the following disadvantages: most schemes adopt an MCU control mode, the control of the schemes is complex, and the cost of devices is high; the lamp is easy to malfunction due to external light interference, for example, the external light briefly irradiates the street lamp to lighten the illumination around the lamp cap of the street lamp, the driving circuit can misjudge, and the street lamp is immediately controlled to be turned off.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is anticipated that a street lamp time delay drive circuit is provided, this street lamp time delay drive circuit has the function that prevents the malfunction.

A street lamp time-delay driving circuit comprises a power supply, a illuminance sensing element, a control circuit, a charging element, a sixth resistor and a mos field effect tube, wherein the output end of the control circuit is connected with the G pole of the mos field effect tube, the anode of the charging element is connected with the G pole of the mos field effect tube, the cathode of the charging element and the S pole of the mos field effect tube are both grounded, the sixth resistor is connected between the anode of the charging element and the power supply, the illuminance sensing element is used for sensing whether illuminance exceeds a threshold value or not, if the illuminance does not exceed the threshold value, the output end of the control circuit outputs a low level, the G pole of the mos field effect tube is a low level, the D pole of the mos field effect tube is a high level, a DIM signal maintains the high level, a street lamp is continuously turned on, if the illuminance exceeds the threshold value, the control circuit is turned off, the power supply is supplied to the charging element through the sixth resistor until the voltage of the charging element is continuously charged to the conduction threshold value of the mos field effect tube, the mos field effect tube is turned on, the street lamp, and the DIM signal is turned off.

Description of the drawings: the DIM signal is a dimming signal.

The utility model discloses street lamp time delay drive circuit's theory of operation as follows: the illuminance sensing element is used for sensing whether illuminance exceeds a threshold value or not, if the illuminance sensing element senses that the illuminance does not exceed the threshold value, the output end of the control circuit outputs a low level, the G pole of the mos field effect transistor is a low level, the D pole of the mos field effect transistor is a high level, a DIM signal maintains the high level, and the street lamp is normally output and continuously lightened. If the illuminance exceeds the threshold value, the control circuit is disconnected, the power supply supplies power to the charging element through the sixth resistor until the voltage of the charging element is continuously charged to the conduction threshold value of the mos field effect tube, the mos field effect tube is conducted, the DIM signal is pulled low, and the street lamp is extinguished.

The utility model discloses street lamp time delay drive circuit, when sensing illuminance and surpassing the threshold value, not the street lamp is extinguish in immediate control, but has a process of charging for the charging element, the voltage of charging element continuously charges to mos field effect transistor's the threshold value that switches on, mos field effect transistor switches on, the DIM signal is drawn low, the street lamp just extinguishes to this intelligent control who not only realizes the street lamp can avoid because the short-lived light in the external world disturbs the problem of malfunction moreover.

The utility model discloses preferred embodiment lies in: the control circuit comprises a first triode, a second triode and a third triode, wherein the base of the first triode is connected with one end of the illuminance sensing element, the collector of the first triode is connected with the base of the second triode, the emitting electrodes of the first triode and the second triode are grounded through a seventh resistor, the collector of the second triode is connected with one end of a fifth resistor, the other end of the fifth resistor is connected with the base of the third triode, the emitting electrode of the third triode is grounded, the collector of the third triode is connected with the G pole of a mos field effect tube, and the power supply is used for supplying power to the first triode, the second triode and the third triode respectively.

The principle of the technical scheme is as follows: when the illuminance sensing element detects that outside illuminance is less than the threshold value, the first triode is conducted, the collector of the first triode is at a low level, the base of the second triode is at a low level, the second triode is stopped, the collector of the second triode is at a high level, the collector of the second triode injects base current into the third triode through the fifth resistor, the third triode is conducted, the collector of the third triode is at a low level, the G of the mos field effect tube is at a low level, the D of the mos field effect tube is at a high level, the DIM signal is unchanged, the high level is maintained, and the street lamp is continuously lighted through normal output.

When the illuminance sensing element detects that outside illuminance is greater than the threshold value, first triode is stopped, first triode collector is the high level, second triode base is the high level, the second triode switches on, the second triode collector is the low level, the third triode is stopped, the positive pole of power charges for the charging element through the sixth resistance, outside illuminance is greater than the threshold value and lasts shining, first triode lasts to stop, the third triode lasts to stop, the voltage of charging element continuously charges to the conduction threshold value of mos field effect transistor, mos field effect transistor switches on, the DIM signal draws low, the street lamp extinguishes, reach the purpose that intelligence was extinguished.

Compared with the MCU control mode, the control circuit has the advantages of simple structure, low device cost, convenience and practicability.

The utility model discloses preferred embodiment lies in: the illuminance sensing element is a photoresistor, one end of the photoresistor is connected with the base electrode of the first triode, and the other end of the photoresistor is grounded.

Has the advantages that: and the photosensitive resistor is adopted, so that the element has a simple structure and low cost.

The utility model discloses preferred embodiment lies in: the charging element is an electrolytic capacitor.

Has the advantages that: by adopting the electrolytic capacitor, the element has simple structure and low cost, and provides breakover voltage for conduction of the mos field effect transistor.

The utility model discloses preferred embodiment lies in: and a second resistor is connected between the base electrode of the first triode and the power supply, a third resistor is connected between the base electrode of the second triode and the power supply, and a fourth resistor is connected between the fifth resistor and the power supply.

Has the advantages that: through setting up second resistance, third resistance and fourth resistance, realize the power supply of power respectively to first triode, second triode and third triode.

Drawings

Fig. 1 is a schematic circuit diagram of an embodiment of the delay driver circuit of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described below are only for illustrating the present invention and do not limit the scope of the present invention.

The terms "first," "second," and the like in the description, claims, and embodiments of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The invention is explained in more detail below by means of preferred embodiments:

reference numerals in the drawings of the specification include: the power supply V +, the photoresistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the first triode Q1, the second triode Q2, the third triode Q3, the electrolytic capacitor CE1 and the mos field effect transistor Q4.

As shown in figure 1: in the street lamp delay driving circuit disclosed in this embodiment, the illuminance sensing element is a photoresistor, and the charging element is an electrolytic capacitor. The device specifically comprises a power supply V +, a photoresistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first triode Q1, a second triode Q2, a third triode Q3, an electrolytic capacitor CE1 and a mos field effect transistor Q4. The control circuit comprises a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a seventh resistor R7, a first triode Q1, a second triode Q2 and a third triode Q3.

The specific connection relationship of the above components is as follows: the base of the first triode Q1 is connected with one end of the photoresistor R1, which is connected with the base of the first triode Q1, is connected with the power supply V + through the second resistor R2, and the other end of the photoresistor R1 is grounded. A second resistor R2 is connected between the base of the first triode Q1 and the power supply V +, the collector of the first triode Q1 is connected with the base of the second triode Q2, and the emitting electrodes of the first triode Q1 and the second triode Q2 are grounded through a seventh resistor R7. A third resistor R3 is connected between the base of the second triode Q2 and the power supply V +, the collector of the second triode Q2 is connected with one end of a fifth resistor R5, the other end of the fifth resistor R5 is connected with the base of the third triode Q3, a fourth resistor R4 is connected between the fifth resistor R5 and the power supply V +, the emitter of the third triode Q3 is grounded, and the collector of the third triode Q3 is connected with the G pole of a mos field effect tube Q4.

The anode of the electrolytic capacitor CE1 is connected with the G pole of the mos field effect transistor Q4, the cathode of the electrolytic capacitor CE1 and the S pole of the mos field effect transistor Q4 are both grounded, and a sixth resistor R6 is connected between the anode of the electrolytic capacitor CE1 and a power supply V +. And D of the mos field effect transistor Q4 is a DIM signal terminal.

The specific working principle of the street lamp time-delay driving circuit of the embodiment is as follows:

when the photosensitive resistor R1 detects that the outside illuminance is less than the threshold value, the first triode Q1 is conducted, the collector of the first triode Q1 is at a low level, the base of the second triode Q2 is at a low level, the second triode Q2 is cut off, the collector of the second triode Q2 is at a high level, the collector of the second triode Q2 injects base current into the third triode Q3 through the fifth resistor R5, the third triode Q3 is conducted, the collector of the third triode Q3 is at a low level, the G of the mos field effect tube Q4 is at a low level, the D of the mos field effect tube Q4 is at a high level, the DIM signal is unchanged, the high level is maintained, and the street lamp is normally output and continuously turned on.

When the photoresistor R1 detects that the external illuminance is greater than the threshold value, the first triode Q1 is cut off, the collector of the first triode Q1 is at a high level, the base of the second triode Q2 is at a high level, the second triode Q2 is conducted, the collector of the second triode Q2 is at a low level, the third triode Q3 is cut off, the anode of the power supply V + charges the electrolytic capacitor CE1 through the sixth resistor R6, the external illuminance is greater than the threshold value for continuous irradiation, the first triode Q1 is continuously cut off, the third triode Q3 is continuously cut off, the voltage of the electrolytic capacitor CE1 is continuously charged to the conduction threshold value of the mos field effect transistor Q4, the mos field effect transistor Q4 is conducted, the DIM signal is pulled down, the street lamp is extinguished after the time delay, and the time is the time when the charging voltage of the electrolytic capacitor CE1 reaches the conduction threshold value voltage of the mos field effect transistor Q4, so that false operation caused by external light interference is prevented.

The preferred embodiments of the present application have been described in detail in the foregoing with reference to the accompanying drawings, and typical known structures and common general knowledge in the technical fields of the preferred embodiments have not been described in detail herein, so that a person skilled in the art can complete and implement the technical solutions of the present application in combination with their own abilities in the light of the present embodiments, and some typical known structures, known methods or common general knowledge in the technical fields should not be considered as obstacles for the person skilled in the art to implement the present application.

The scope of protection claimed in the present application shall be subject to the content of the claims, and the content of the utility model, the detailed description, and the description accompanying drawings shall be used to explain the claims.

Several modifications may be made to the embodiments of the present application within the scope of the technical idea of the present application, and the embodiments after such modifications should also be considered within the scope of the present application.

Claims

1. The utility model provides a street lamp time delay drive circuit which characterized in that: the street lamp comprises a power supply, a illuminance sensing element, a control circuit, a charging element, a sixth resistor and a mos field effect tube, wherein the output end of the control circuit is connected with the G pole of the mos field effect tube, the positive pole of the charging element is connected with the G pole of the mos field effect tube, the negative pole of the charging element and the S pole of the mos field effect tube are both grounded, the sixth resistor is connected between the positive pole of the charging element and the power supply, the illuminance sensing element is used for sensing whether illuminance exceeds a threshold value or not, if the illuminance does not exceed the threshold value, the output end of the control circuit outputs a low level, the G pole of the mos field effect tube is a low level, the D pole of the mos field effect tube is a high level, a DIM signal maintains the high level, the street lamp is continuously turned on, if the illuminance exceeds the threshold value, the control circuit is turned off, the power supply is supplied to the charging element through the sixth resistor until the voltage of the charging element is continuously charged to the conduction threshold value of the mos field effect tube, the mos field effect tube is turned on, the DIM signal is pulled down, and the street lamp is turned off.

2. The delay driving circuit of street lamp according to claim 1, wherein: the control circuit comprises a first triode, a second triode and a third triode, wherein the base of the first triode is connected with one end of the illuminance sensing element, the collector of the first triode is connected with the base of the second triode, the emitting electrodes of the first triode and the second triode are grounded through a seventh resistor, the collector of the second triode is connected with one end of a fifth resistor, the other end of the fifth resistor is connected with the base of the third triode, the emitting electrode of the third triode is grounded, the collector of the third triode is connected with the G pole of a mos field effect tube, and the power supply is used for supplying power to the first triode, the second triode and the third triode respectively.

3. The street lamp delay driving circuit according to claim 2, wherein: the illuminance sensing element is a photoresistor, one end of the photoresistor is connected with the base electrode of the first triode, and the other end of the photoresistor is grounded.

4. The street lamp delay driving circuit according to claim 2, wherein: the charging element is an electrolytic capacitor.

5. The street lamp delay driving circuit according to claim 2, wherein: and a second resistor is connected between the base electrode of the first triode and the power supply, a third resistor is connected between the base electrode of the second triode and the power supply, and a fourth resistor is connected between the fifth resistor and the power supply.