Street lamp control system
The street light control system, composed of a light detection module and a transistor relay, solves the problem that existing automatic street light control circuits require a processor, thus simplifying the manufacturing process and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- POWER CHINA KUNMING ENG CORP LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-19
AI Technical Summary
Existing automatic control circuits for streetlights require processors for processing and control, which are complex to design, have long manufacturing cycles, and are costly, making them unsuitable for mass production and widespread adoption.
The control system, composed of a light detection module, transistors, and relays, detects light intensity through the light detection module and controls the opening and closing of the relays to achieve automatic switching of streetlights without the need for processors or software programming.
It simplifies the production process, reduces software programming steps, shortens the production cycle, and lowers production costs.
Smart Images
Figure CN224265159U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lighting technology, and in particular to a street light control system. Background Technology
[0002] Street lighting can improve traffic conditions, reduce driver fatigue, and enhance road capacity and traffic safety. It also beautifies the cityscape. With urban development, urban lighting construction is increasingly focused on the city's image, leading to a continuous increase in the demand for and quantity of road and landscape lighting.
[0003] Existing automatic control circuits for streetlights require numerous electronic components, most of which require processors for processing and control. The design process involves programming, resulting in a long production cycle, which increases manufacturing costs and hinders mass production and widespread adoption. Utility Model Content
[0004] The purpose of this invention is to provide a street light control system that does not require a processor for processing and control, thereby reducing software programming steps, shortening the manufacturing cycle, and saving manufacturing costs.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] One aspect of this utility model provides a street light control system, the control system comprising: a light detection module, a first transistor and a first resistor, the light detection module being used to detect the ambient light intensity, the output terminal of the light detection module being connected to the base of the first transistor, the collector of the first transistor being connected to one end of the first resistor, the other end of the first resistor being connected to a first power supply, and the emitter of the first transistor being connected to a first location; a second transistor, a relay, a second resistor and a lighting lamp, the base of the second transistor being connected to the collector of the first transistor, the collector of the second transistor being connected to a first coil terminal of the relay, a second coil terminal of the relay being connected to the first power supply through the second resistor, the emitter of the second transistor being connected to the first location, a first contactor terminal of the relay being connected to a second power supply, a second contactor terminal of the relay being connected to the input terminal of the lighting lamp, and the output terminal of the lighting lamp being connected to a second location.
[0007] In some embodiments, the light detection module includes a photodiode, a comparator, a third resistor, a fourth resistor, a fifth resistor, and a first capacitor. The cathode of the photodiode is connected to a first power supply, the anode of the photodiode is connected to one end of the third resistor and one end of the fourth resistor, the other end of the fourth resistor is connected to a first ground point, the other end of the third resistor is connected to the non-inverting input of the comparator, the inverting input of the comparator is connected to a reference voltage, the output of the comparator is connected to one end of the first capacitor and the base of the first transistor through the fifth resistor, and the other end of the first capacitor is connected to the first ground point.
[0008] In some embodiments, the light detection module further includes a sixth resistor and a seventh resistor. One end of the sixth resistor is connected to a first power supply, and the other end of the sixth resistor is connected to one end of the seventh resistor. The other end of the seventh resistor is connected to a first ground point. The other end of the sixth resistor and one end of the seventh resistor are used to output a reference voltage to the inverting input of the comparator.
[0009] In some embodiments, the control system further includes an eighth resistor, one end of which is connected to the base of the second transistor, and the other end of which is connected to a first location.
[0010] In some embodiments, the control system further includes a Zener diode, a ninth resistor, a tenth resistor, and a second capacitor. One end of the ninth resistor is connected to the second terminal of the relay contactor. The Zener diode, the second capacitor, and the tenth resistor are connected in parallel. The cathode of the Zener diode and the input terminal of the lighting lamp are connected to the other end of the ninth resistor. The anode of the Zener diode and the output terminal of the lighting lamp are connected to a second location.
[0011] In some embodiments, the control system further includes a third transistor and an eleventh resistor disposed between the other end of the ninth resistor and the input terminal of the lighting lamp, wherein the collector of the third transistor and one end of the eleventh resistor are connected to the other end of the ninth resistor, the other end of the eleventh resistor is connected to the base of the third transistor, and the emitter of the third transistor is connected to the input terminal of the lighting lamp.
[0012] In some embodiments, the control system further includes a diode, the anode of which is connected to a first terminal of the relay coil and the collector of the second transistor, and the cathode of which is connected to a second terminal of the relay coil.
[0013] A street light control system according to an embodiment of the present invention has at least the following beneficial effects: when the light intensity is higher than a preset threshold, the comparator outputs a high-level signal, the first transistor is turned on, the second transistor is turned off, the relay contactor is disconnected, and the light is off; when the light intensity is lower than the preset threshold, the comparator outputs a low-level signal, the first transistor is turned off, the second transistor is turned on, the relay contactor is closed, and the light is on. This application does not require a processor for processing and control, reducing software programming steps, shortening the manufacturing cycle, and saving manufacturing costs.
[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this disclosure. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a circuit diagram of a street light control system according to an embodiment. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.
[0021] The technical solutions of the embodiments of this application are briefly described below:
[0022] According to some embodiments, such as Figure 1 As shown, this application provides a street light control system, the control system comprising:
[0023] The light detection module, the first transistor Q1, and the first resistor R1 are used to detect the intensity of external light. The output terminal of the light detection module is connected to the base of the first transistor Q1. The collector of the first transistor Q1 is connected to one end of the first resistor R1. The other end of the first resistor R1 is connected to the first power supply V1. The emitter of the first transistor Q1 is connected to the first ground point GND1.
[0024] The system consists of a second transistor Q2, a relay K, a second resistor R2, and an LED light. The base of the second transistor Q2 is connected to the collector of the first transistor Q1. The collector of the second transistor Q2 is connected to the first terminal of the coil of the relay K. The second terminal of the coil of the relay K is connected to the first power supply V1 through the second resistor R2. The emitter of the second transistor Q2 is connected to the first ground point GND1. The first terminal of the contactor of the relay K is connected to the second power supply V2. The second terminal of the contactor of the relay K is connected to the input terminal of the LED light. The output terminal of the LED light is connected to the second ground point GND2.
[0025] The working principle of the above embodiment is as follows: When the light intensity is higher than a preset threshold, the light detection module outputs a high-level signal. The base of the first transistor Q1 receives the high-level signal, and the first transistor Q1 conducts. The base signal of the second transistor Q2 is pulled low by the first transistor Q1, and the second transistor Q2 is cut off. The coil of the relay K is not energized, the contactor of the relay K is open, and the LED light is not energized and does not light up. When the light intensity is lower than the preset threshold, the light detection module outputs a low-level signal. The base of the first transistor Q1 receives the low-level signal, and the first transistor Q1 is cut off. The base signal of the second transistor Q2 is pulled up by the first resistor R1, and the second transistor Q2 conducts. The coil of the relay K is energized, the contactor of the relay K is closed, and the LED light is energized and lit. This application does not require a processor for processing and control, reducing the software programming steps, shortening the street light manufacturing cycle, and saving manufacturing costs.
[0026] The following is in conjunction with the appendix to this instruction manual. Figure 1 The preferred embodiments of this disclosure will be further described in detail below.
[0027] According to some embodiments, such as Figure 1 As shown, the light detection module includes a photodiode DP, a comparator U, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first capacitor C1. Its specific connection method is as follows:
[0028] The cathode of the photodiode DP is connected to the first power supply V1, and the anode of the photodiode DP is connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the first ground point GND1. The other end of the third resistor R3 is connected to the non-inverting input of the comparator U. The inverting input of the comparator U is connected to the reference voltage. The output of the comparator U is connected to one end of the first capacitor C1 and the base of the first transistor Q1 through the fifth resistor R5. The other end of the first capacitor C1 is connected to the first ground point GND1.
[0029] The working principle of the above embodiment is as follows: when the light intensity is higher than the preset threshold, the resistance of the photodiode DP decreases, the voltage at the non-inverting input terminal of the comparator U is higher than the reference voltage at the inverting input terminal of the comparator U, and the comparator U outputs a high-level signal; after the base of the first transistor Q1 receives the high-level signal output by the comparator U, the first transistor Q1 is turned on, the base electrical signal of the second transistor Q2 is pulled low by the first transistor Q1, the second transistor Q2 is turned off, the coil terminal of the relay K is not energized, the contactor of the relay K is disconnected, and the LED lighting lamp is not energized and does not light up.
[0030] When the light intensity is lower than the preset threshold, the resistance of the photodiode DP increases, the voltage at the non-inverting input of comparator U is lower than the reference voltage at the inverting input of comparator U, and comparator U outputs a low-level signal; after the base of the first transistor Q1 receives the low-level signal output by comparator U, the first transistor Q1 is turned off, the base electrical signal of the second transistor Q2 is pulled up by the first resistor R1, the second transistor Q2 is turned on, the coil terminal of relay K is energized, the contactor of relay K is closed, and the LED lighting lamp is energized and lit.
[0031] This application does not require a processor for processing and control, reducing the steps of software programming, shortening the production cycle of streetlights, and saving production costs.
[0032] According to some embodiments, such as Figure 1 As shown, the light detection module also includes a sixth resistor R6 and a seventh resistor R7, and their specific connection method is as follows.
[0033] One end of the sixth resistor R6 is connected to the first power supply V1, and the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7. The other end of the seventh resistor R7 is connected to the first ground point GND1. The other end of the sixth resistor R6 and one end of the seventh resistor R7 are used to output the reference voltage to the inverting input of the comparator U.
[0034] Among them, the sixth resistor R6 and the seventh resistor R7 are used to obtain the reference voltage after voltage division. The value of the reference voltage can be set according to actual needs, and the value of the reference voltage is determined by the resistance values of the sixth resistor R6 and the seventh resistor R7.
[0035] According to some embodiments, such as Figure 1 As shown, the control system also includes an eighth resistor R8, one end of which is connected to the base of the second transistor Q2, and the other end of which is connected to the first ground point GND1.
[0036] Among them, the first resistor R1 and the eighth resistor R8 form a voltage divider to obtain a suitable turn-on voltage range for the base of the second transistor Q2.
[0037] According to some embodiments, such as Figure 1 As shown, the control system also includes a Zener diode DZ, a ninth resistor R9, a tenth resistor R10, and a second capacitor C2, with the specific connection method as follows.
[0038] One end of the ninth resistor R9 is connected to the second terminal of the contactor of relay K. The Zener diode DZ, the second capacitor C2, and the tenth resistor R10 are connected in parallel. The cathode of the Zener diode DZ and the input terminal of the LED light are connected to the other end of the ninth resistor R9. The anode of the Zener diode DZ and the output terminal of the LED light are connected to the second ground GND2.
[0039] Among them, the Zener diode DZ, the second capacitor C2 and the tenth resistor R10 are used for voltage regulation and filtering, the ninth resistor R9 is used for current limiting, and the ninth resistor R9 and the tenth resistor R10 also form a voltage divider to obtain a suitable operating voltage for LED lighting.
[0040] According to some embodiments, such as Figure 1 As shown, the control system also includes a third transistor Q3 and an eleventh resistor R11, which are located between the other end of the ninth resistor R9 and the input terminal of the LED light. The specific connection method is as follows:
[0041] The collector of the third transistor Q3 and one end of the eleventh resistor R11 are connected to the other end of the ninth resistor R9. The other end of the eleventh resistor R11 is connected to the base of the third transistor Q3. The emitter of the third transistor Q3 is connected to the input terminal of the LED light.
[0042] If the second voltage is too high, the third transistor Q3 will further divide the voltage, and the magnitude of the voltage division is determined by the resistance value of the eleventh resistor R11.
[0043] According to some embodiments, such as Figure 1 As shown, the control system also includes a diode D. The positive terminal of the diode D is connected to the first terminal of the coil of the relay K and the collector of the second transistor Q3, and the negative terminal of the diode D is connected to the second terminal of the coil of the relay K.
[0044] Specifically, when the coil terminal of relay K is de-energized, the coil terminal of relay K continues to flow through diode D.
[0045] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0046] Although this disclosure has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Because this disclosure can be embodied in many forms without departing from the spirit or substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A street light control system, characterized in that, The control system includes: The light detection module comprises a light detection module, a first transistor, and a first resistor. The light detection module is used to detect the intensity of external light. The output terminal of the light detection module is connected to the base of the first transistor. The collector of the first transistor is connected to one end of the first resistor. The other end of the first resistor is connected to a first power supply. The emitter of the first transistor is connected to a first ground point. The system comprises a second transistor, a relay, a second resistor, and a lighting lamp. The base of the second transistor is connected to the collector of the first transistor. The collector of the second transistor is connected to the first coil terminal of the relay. The second coil terminal of the relay is connected to a first power supply through the second resistor. The emitter of the second transistor is connected to a first ground location. The first contactor terminal of the relay is connected to a second power supply. The second contactor terminal of the relay is connected to the input terminal of the lighting lamp. The output terminal of the lighting lamp is connected to a second ground location.
2. The control system according to claim 1, characterized in that, The light detection module includes a photodiode, a comparator, a third resistor, a fourth resistor, a fifth resistor, and a first capacitor. The cathode of the photodiode is connected to a first power supply, the anode of the photodiode is connected to one end of the third resistor and one end of the fourth resistor, the other end of the fourth resistor is connected to a first ground point, the other end of the third resistor is connected to the non-inverting input of the comparator, the inverting input of the comparator is connected to a reference voltage, the output of the comparator is connected to one end of the first capacitor and the base of the first transistor through the fifth resistor, and the other end of the first capacitor is connected to the first ground point.
3. The control system according to claim 2, characterized in that, The light detection module further includes a sixth resistor and a seventh resistor. One end of the sixth resistor is connected to a first power supply, and the other end of the sixth resistor is connected to one end of the seventh resistor. The other end of the seventh resistor is connected to a first ground point. The other end of the sixth resistor and one end of the seventh resistor are used to output a reference voltage to the inverting input of the comparator.
4. The control system according to claim 1, characterized in that, The control system further includes an eighth resistor, one end of which is connected to the base of the second transistor, and the other end of which is connected to a first location.
5. The control system according to claim 1, characterized in that, The control system further includes a Zener diode, a ninth resistor, a tenth resistor, and a second capacitor. One end of the ninth resistor is connected to the second terminal of the relay contactor. The Zener diode, the second capacitor, and the tenth resistor are connected in parallel. The cathode of the Zener diode and the input terminal of the lighting lamp are connected to the other end of the ninth resistor. The anode of the Zener diode and the output terminal of the lighting lamp are connected to a second location.
6. The control system according to claim 5, characterized in that, The control system further includes a third transistor and an eleventh resistor disposed between the other end of the ninth resistor and the input terminal of the lighting lamp. The collector of the third transistor and one end of the eleventh resistor are connected to the other end of the ninth resistor, the other end of the eleventh resistor is connected to the base of the third transistor, and the emitter of the third transistor is connected to the input terminal of the lighting lamp.
7. The control system according to claim 1, characterized in that, The control system further includes a diode, the positive terminal of which is connected to the first terminal of the relay coil and the collector of the second transistor, and the negative terminal of which is connected to the second terminal of the relay coil.