Stepless dimming single lamp inspection LED smart lamps and lighting management digital platform

Abstract

The present invention provides a stepless dimming single-lamp inspection LED smart lamp and a smart city lighting management digital platform equipped with the stepless dimming single-lamp inspection LED smart lamp. The lighting management digital platform includes a remote control center, multiple groups of LED smart lamp groups, and multiple ambient light detection circuits. Multiple LED smart street lamps located in the same section or the same area are grouped together and correspond to one ambient light detection circuit. Each LED smart lamp includes a control chip, a DC power supply, a voltage adjustment circuit, an LED constant current control circuit and an LED street lamp; the DC power supply includes a rectifier circuit, a front circuit and a switch control circuit; the platform can ensure actual brightness requirements, thereby ensuring traffic safety, and can also save energy, has strong adaptability, and can adapt to various traffic sections; it can also monitor the working status of each single lamp in real time, and issue early warnings for faulty single lamps, thereby facilitating maintenance and inspection.

Description

Technical Field

[0001] The present invention relates to a smart city platform street lamp, and in particular to a stepless dimming single-lamp inspection LED smart lamp and a smart city lighting management digital platform equipped with the stepless dimming single-lamp inspection LED smart lamp. Background Art

[0002] LED is widely used in traffic lights due to its own characteristics, such as stability and long service life. In existing traffic lights, LED lights are all controlled by cluster control, which has the following defects: although cluster control can work according to the set working requirements, that is, all traffic lights work according to the uniformly set brightness, it is impossible to independently control a single street light or street lights in a local section. Therefore, this method has poor adaptability and flexibility, because in traffic sections, the ambient light in different sections is different. For example, at noon, this difference is small, because the ambient light brightness is strong, which can meet the traffic lighting needs. However, in the evening, due to the weakening of the ambient light intensity and the influence of tall green plants around the roadside, the actual ambient light of LED street lights at different road sections is quite different. If it is still illuminated at the same brightness, the brightness is large at this time, which will cause a waste of resources. If the brightness is small, it cannot meet the lighting needs of certain sections.

[0003] Therefore, in order to solve the above technical problems, it is urgent to propose a new and more flexible lighting control solution. Summary of the invention

[0004] The purpose of the present invention is to provide a stepless dimming single-lamp inspection LED smart lamp and a smart city lighting management digital platform equipped with the stepless dimming single-lamp inspection LED smart lamp, which partially solves or alleviates the above-mentioned deficiencies in the prior art. The LED smart lamp has good flexibility, so that the lighting brightness of each LED smart lamp can be adaptively adjusted according to the actual ambient light brightness, which can ensure the actual brightness requirements, thereby ensuring traffic safety, and can also save energy, have strong adaptability, and can adapt to various traffic sections. Furthermore, it can also monitor the working status of each single lamp in real time, and can warn the faulty single lamp, which is conducive to maintenance and inspection.

[0005] In order to solve the above-mentioned technical problems, the present invention specifically adopts the following technical solutions:

[0006] The first aspect of the present invention is to provide a stepless dimming single-lamp inspection LED smart lamp, which includes: a control chip, a rectifier circuit, a front circuit, a switch control circuit, a voltage adjustment circuit, an LED constant current control circuit, an LED street lamp, and an ambient light detection circuit connected to the main control chip, for detecting the ambient light state; the ambient light state includes that the ambient light brightness meets the actual demand, or the ambient light brightness does not meet the actual demand; wherein, the input end of the rectifier circuit is externally connected to the mains, the output end of the rectifier circuit is connected to the input end of the front circuit, the output end of the front circuit is connected to the input end of the switch control circuit, the output end of the switch control circuit is connected to the input end of the voltage adjustment circuit, the output end of the voltage adjustment circuit is connected to the positive pole of the LED street lamp, the negative pole of the LED street lamp is connected to the input end of the LED constant current control circuit, and the control output end of the control chip is respectively connected to the input ends of the voltage adjustment circuit, the LED constant current control circuit and the switch control circuit;

[0007] The control chip is used to control the switching circuit to be turned on when the ambient light state detected by the ambient light detection circuit is that the ambient light brightness does not meet the actual demand, and determine the actual operating voltage of the LED street lamp and the target operating current required to achieve the preset target brightness according to the output value of the ambient light detection circuit and the preset target brightness of the LED street lamp in the current period, and generate a corresponding control signal to be sent to the voltage adjustment circuit and the LED constant current control circuit, so that the voltage adjustment circuit outputs the actual operating voltage and the LED constant current control circuit outputs the target operating current; or, when the ambient light state detected by the ambient light detection circuit is that the ambient light brightness meets the actual demand, control the switching circuit to be turned off; the control signal includes the PWM duty cycle value corresponding to the actual operating voltage and the resistance value of the digital potentiometer RP in the LED constant current control circuit corresponding to the target operating current.

[0008] In some embodiments of the present invention, the stepless dimming single-lamp inspection LED smart lamp further includes: the LED constant current control circuit includes a digital potentiometer RP, a first resistor R12, a second resistor R14, an operational amplifier U1, a third resistor R15, a fourth resistor R17, a fifth resistor R18, a first capacitor C6 and a first NMOS tube Q2; wherein the positive power supply terminal of the digital potentiometer RP is connected to the power supply VCC, the negative power supply terminal of the digital potentiometer RP is connected to one end of the second resistor R14 through the first resistor R12, and the control input terminal of the digital potentiometer RP is connected to the control input terminal of the control chip The output end of the operational amplifier U1 is connected to the control output end, the other end of the second resistor R14 is grounded, the non-inverting end of the operational amplifier U1 is connected to the common connection point between the first resistor R12 and the second resistor R14, the inverting end of the operational amplifier U1 is connected to the source of the first NMOS tube Q2 through the fourth resistor R17, the source of the first NMOS tube Q2 is grounded through the fifth resistor R18, the inverting end of the operational amplifier U1 is also grounded through the first capacitor C6, the output end of the operational amplifier U1 is connected to the gate of the first NMOS tube Q2 through the third resistor R15, and the drain of the first NMOS tube Q2 is connected to the cathode of the LED street lamp.

[0009] In some embodiments of the present invention, the LED constant current control circuit further includes a temperature compensation circuit, which includes a ninth resistor R9, a thermistor NTC, a tenth resistor R10, a thirteenth resistor R13, a sixteenth resistor R16, a nineteenth resistor R19, a capacitor C7, and a second NMOS tube Q3; one end of the ninth resistor R9 is connected to the power supply VCC, the other end of the ninth resistor R9 is connected to one end of the thermistor NTC through the tenth resistor R10, the other end of the thermistor NTC is grounded, and the ninth resistor R9 and the tenth resistor R10 are connected to each other. The common connection point is connected to the drain of the second NMOS tube Q3, the gate of the second NMOS tube Q3 is connected to the common connection point between the thermistor NTC and the tenth resistor R10 through the resistor R13, the gate of the second NMOS tube Q3 is grounded through the capacitor C7, the source of the second NMOS tube Q3 is connected to one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is grounded through the nineteenth resistor R19, and the common connection point of the sixteenth resistor R16 and the nineteenth resistor R19 is connected to the gate of the first NMOS tube Q2 as the output end of the temperature compensation circuit.

[0010] In some embodiments of the present invention, the switch control circuit includes an optocoupler OC1, a twenty-fourth resistor R24, a diode D5 and a transistor Q4; wherein, the collector of the photosensitive transistor in the optocoupler OC1 serves as the input end of the switch control circuit, the emitter of the photosensitive transistor in the optocoupler OC1 serves as the output end of the switch control circuit, one end of the twenty-fourth resistor R24 ​​is connected to the output end of the preamplifier circuit, the other end of the twenty-fourth resistor R24 ​​is connected to the collector of the transistor Q4, the emitter of the transistor Q4 is connected to the positive electrode of the light-emitting diode in the optocoupler OC1, the negative electrode of the light-emitting diode in the optocoupler OC1 is grounded, the base of the transistor Q4 is connected to the negative electrode of the diode D5, and the positive electrode of the diode D5 serves as the control input end of the switch control circuit and is connected to the control chip.

[0011] In some embodiments of the present invention, the stepless dimming single-lamp inspection LED smart lamp further includes: a current detection module for detecting the real-time working current of the LED street lamp, which is electrically connected to the control chip.

[0012] In some embodiments of the present invention, the control chip is used to determine whether the actual working current monitored by the current detection module is greater than a preset threshold value. If it is less than or equal to the preset threshold value, the LED street lamp is determined to be faulty, and a single-lamp alarm message is sent to a remote control center via a wireless network; the single-lamp alarm message includes the preset number of the LED street lamp and the section information of the road where it is located.

[0013] The second aspect of the present invention is to provide a smart city lighting management digital platform equipped with a stepless dimming single-lamp inspection LED smart lamp, which includes a remote control center, multiple groups of LED smart lamps, and multiple ambient light detection circuits. Multiple LED smart street lamps located in the same section or the same area are grouped together and correspond to one ambient light detection circuit, wherein the LED smart lamp includes: a control chip, a rectifier circuit, a front circuit, a switch control circuit, a voltage adjustment circuit, an LED constant current control circuit, and an LED street lamp; the input end of the rectifier circuit is externally connected to the mains, the output end of the rectifier circuit is connected to the input end of the front circuit, the output end of the front circuit is connected to the input end of the switch control circuit, the output end of the switch control circuit is connected to the input end of the voltage adjustment circuit, the output end of the voltage adjustment circuit is connected to the positive pole of the LED street lamp, the negative pole of the LED street lamp is connected to the input end of the LED constant current control circuit, and the control output end of the control chip is respectively connected to the input ends of the voltage adjustment circuit, the LED constant current control circuit and the switch control circuit;

[0014] The ambient light detection circuit is used to detect the ambient light state of the corresponding road section or the corresponding area, and the output end of the ambient light detection circuit is connected to the control chip of any LED street lamp in the road section or the area; the control chip sends the ambient light state detected by the ambient light detection circuit to the remote control center; wherein the ambient light state includes that the ambient light brightness meets the actual demand, or the ambient light brightness does not meet the actual demand;

[0015] The remote control center generates a corresponding control signal according to the ambient light state sent by the current control chip and sends it to each control chip in the road section or area corresponding to the current control chip, so that the control chip controls the on and off of the switch control circuit, and controls the LED constant current control circuit to output a corresponding current according to the control signal to adjust the brightness of the corresponding LED street lamp;

[0016] Specifically, the remote control center receives the current ambient light status of each road section or each area, and when it is identified that the ambient light status is that the ambient light does not meet the actual demand, the remote control center obtains the brightness requirement level of each sub-section in the corresponding road section, or each sub-area in the corresponding area in the current time period and the target brightness corresponding to each brightness requirement level; then, according to the target brightness of each sub-section or each sub-area in the current time period, and the output value of the ambient light detection circuit, the actual operating voltage and target operating current required to achieve the target brightness are determined, and a corresponding control signal is generated and sent to the control chip of each LED street lamp in the corresponding sub-section or the corresponding sub-area, the control chip controls the switching circuit to be turned on, and controls the voltage regulation circuit to output the actual operating voltage and the LED constant current control circuit to output the target operating current according to the control signal; the control signal includes the PWM duty cycle value corresponding to the actual operating voltage, the RP resistance value of the digital potentiometer RP in the LED constant current control circuit corresponding to the target operating current, and the preset number of the LED street lamp group in the corresponding sub-section or the corresponding sub-area.

[0017] In some embodiments of the present invention, the smart city lighting management digital platform equipped with stepless dimming single-lamp inspection LED smart lamps also includes: a data acquisition module set in each sub-section and communicating data with the remote control center, the remote control center receives the vehicle flow and / or pedestrian flow of each sub-section in different time periods collected by the data acquisition module within a preset collection time period, and when it is judged that the vehicle flow in any time period is greater than the first vehicle flow threshold, and the pedestrian flow is greater than the first pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-section is marked as high, and the corresponding first target brightness is set; or when it is judged that the vehicle flow in any time period is greater than the second vehicle flow threshold, or when it is judged that the pedestrian flow in any time period is greater than the second pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-section is marked as medium, and the corresponding second target brightness is set; or when it is judged that the vehicle flow in any time period is less than or equal to the third vehicle flow threshold, or when it is judged that the pedestrian flow in any time period is less than or equal to the third pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-section is marked as low, and the corresponding third target brightness is set.

[0018] In some embodiments of the present invention, the smart city lighting management digital platform also includes a data acquisition module that is arranged in each sub-area and communicates data with the remote control center. The remote control center receives the flow of people in each sub-area at different time periods collected by the data acquisition module within a preset collection time period, and when it is judged that the flow of people in any time period is greater than the fourth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as high, and the corresponding first target brightness is set; or when it is judged that the flow of people in any time period is greater than the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as medium, and the corresponding second target brightness is set, and the fifth flow threshold is less than the fourth flow threshold; or when it is judged that the flow of people in any time period is less than or equal to the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as low, and the corresponding third target brightness is set.

[0019] In some embodiments of the present invention, the LED smart lamp also includes a current detection module for detecting the real-time working current of the LED street lamp, which is electrically connected to the control chip; the control chip sends the actual working current detected by the current detection module to the remote monitoring center, and the remote monitoring center determines whether the actual working current of each LED street lamp is greater than a preset threshold value. If it is less than or equal to the preset threshold value, the corresponding LED street lamp is determined to be faulty and a single-lamp alarm message is generated; the single-lamp alarm message includes the preset number of the corresponding LED street lamp and the section information of the road section where it is located.

[0020] Beneficial effect: Compared with centralized control, the present application is different from centralized control in that an LED constant current control circuit, a voltage adjustment circuit and a switch control circuit are provided for each LED street lamp, so that the actual working current input to the LED street lamp can be adjusted by controlling the voltage adjustment circuit and the LED constant current control circuit, thereby realizing independent control of the brightness of a single lamp. For example, when the external ambient light detection circuit detects that the ambient light brightness around the LED street lamp does not meet the actual demand, the switch control circuit can be controlled to conduct, so that the voltage adjustment circuit enters the working state and outputs the actual working voltage required to achieve the target brightness. At the same time, the LED constant current control circuit outputs the target working current required to achieve the target brightness, so that the brightness of the LED street lamp reaches the target brightness. Furthermore, the lighting brightness of each or each group of street lamps in different sections can be adaptively adjusted according to the actual ambient light brightness of each or each group of street lamps in different sections, so as to ensure the actual brightness demand of each section, thereby ensuring traffic safety, and saving energy. It has strong adaptability and can adapt to various traffic sections.

[0021] Furthermore, even for the same road section, the brightness of the LED street lights in the corresponding sub-sections (or sub-areas) can be adjusted according to the brightness demand levels of different sub-sections in the same section (or different sub-areas in the same area) at different time periods. This is not only highly flexible, but also closer to actual needs and more resource-saving.

[0022] Furthermore, the working status of each single lamp can be monitored in real time, and a warning can be issued for a faulty single lamp, thereby facilitating maintenance and inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without paying creative labor.

[0024] Figure 1 This is a schematic diagram of the functional module structure of an embodiment of a smart city lighting management digital platform equipped with a stepless dimming single-lamp inspection LED smart lamp of the present invention;

[0025] Figure 2A This is a schematic diagram of the functional module structure of an embodiment of an LED smart lamp with stepless dimming and single lamp inspection according to the present invention;

[0026] Figure 2BThis is a schematic diagram of the functional module structure of another embodiment of the stepless dimming single-lamp inspection LED smart lamp of the present invention;

[0027] Figure 3 This is a schematic diagram of the LED constant current control circuit in the stepless dimming single-lamp inspection LED smart lamp of the present invention;

[0028] Figure 4 It is a voltage adjustment circuit and DC power supply principle diagram of the stepless dimming single-lamp inspection LED smart lamp of the present invention;

[0029] Figure 5 This is a schematic diagram of the ambient light detection circuit in the stepless dimming single-lamp inspection LED smart lamp of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Herein, suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings by themselves. Therefore, "module", "component" or "unit" can be used mixedly.

[0032] In this document, the terms "upper", "lower", "inner", "outer", "front", "back", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In this document, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Herein "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] Herein, "plurality" means two or more than two, ie, it includes two, three, four, five, etc.

[0036] In this article, the full name of the smart city management platform is the "Smart City" urban lighting management digital platform. Through intelligent design and refined management and control, it realizes the intelligent remote centralized control, independent control, automatic adjustment and other functions of LED smart lamps.

[0037] In this article, stepless dimming refers to adjusting the current input to the LED street lamp to achieve power changes, thereby achieving brightness adjustment of the LED street lamp.

[0038] Example 1: See Figure 2A The present invention provides a stepless dimming single-lamp inspection LED smart lamp, which specifically includes: a control chip, a DC power supply, a voltage adjustment circuit, an LED constant current control circuit and an LED street lamp.

[0039] In some embodiments, the DC power supply includes a rectifier circuit, a preamplifier circuit and a switch control circuit; wherein the input end of the rectifier circuit is externally connected to the AC power, the output end of the rectifier circuit is connected to the input end of the preamplifier circuit, the output end of the preamplifier circuit is connected to the input end of the switch control circuit, the output end of the switch control circuit is connected to the input end of the voltage adjustment circuit, the output end of the voltage adjustment circuit is connected to the positive pole of the LED street lamp, and the negative pole of the LED street lamp is connected to the input end of the LED constant current control circuit.

[0040] In some embodiments, the rectifier circuit uses a full-bridge rectifier circuit Z1 composed of diodes.

[0041] In some embodiments, the control chip uses the MT32L083 chip. Of course, the chip also has corresponding peripheral circuits, which can be built according to its factory specification, and will not be described in detail here.

[0042] In some embodiments, the voltage adjustment circuit uses the UC3843 chip and its peripheral circuits, as shown in FIG. Figure 4 shown.

[0043] In some embodiments, the LED constant current control circuit includes a digital potentiometer RP, a first resistor R12, a second resistor R14, an operational amplifier U1, a third resistor R15, a fourth resistor R17, a fifth resistor R18, a capacitor C6, and a first NMOS tube Q2; wherein the positive power terminal of the digital potentiometer RP is connected to the power supply VCC, the negative power terminal of the digital potentiometer RP is connected to one end of the second resistor R14 through the first resistor R12, the control input terminal of the digital potentiometer RP is connected to the control output terminal of the control chip, the other end of the second resistor R14 is grounded, and the in-phase terminal of the operational amplifier U1 is connected to the power supply VCC. The operational amplifier U1 is connected to a common connection point between the first resistor R12 and the second resistor R14, the inverting end of the operational amplifier U1 is connected to the source of the first NMOS tube Q2 through the fourth resistor R17, the source of the first NMOS tube Q2 is grounded through the fifth resistor R18, the inverting end of the operational amplifier U1 is grounded through the capacitor C6, the output end of the operational amplifier U1 is connected to the gate of the first NMOS tube Q2 through the third resistor R15, and the drain of the first NMOS tube Q2 is connected to the negative electrode of the LED street lamp (preferably, the LED street lamp is composed of multiple LED lamps connected in series or / and in parallel, which is the prior art and will not be repeated here).

[0044] A constant current circuit is formed by the above structure, the fifth resistor R18 forms a current detection resistor, and current feedback is performed through the fourth resistor R17. Then, the voltage signals at the in-phase terminal and the inverting terminal of the operational amplifier U1 are compared and controlled to keep the first NMOS tube Q2 in a stable on state. Different on states of the first NMOS tube Q2 correspond to different on resistances, thereby adjusting the operating current of the LED street lamp.

[0045] Further, see Figure 2B The stepless dimming single-lamp inspection LED smart lamp also includes an ambient light detection circuit electrically connected to the control chip. Accordingly, the control chip of the LED smart lamp obtains the actual operating voltage of the LED street lamp and the target operating current required to achieve the preset target brightness of the current period according to the ambient light state of the corresponding LED street lamp detected by the ambient light detection circuit. The actual operating voltage is achieved by the control chip generating a corresponding PWM signal (including PWM duty cycle) to control the voltage adjustment circuit, and the target operating current is adjusted by controlling the resistance value of the digital potentiometer RP in the LED constant current control circuit, so that the operational amplifier controls the first NMOS tube Q2 to operate in the corresponding on state to form a constant operating current.

[0046] In some embodiments, the digital potentiometer RP can be an existing digital potentiometer chip, which will not be described in detail here.

[0047] In some other embodiments, the LED constant current control circuit further includes a temperature compensation circuit, which includes a ninth resistor R9, a thermistor NTC, a tenth resistor R10, a thirteenth resistor R13, a sixteenth resistor R16, a nineteenth resistor R19, a capacitor C7, and a second NMOS tube Q3; wherein one end of the ninth resistor R9 is connected to the power supply VCC, the other end of the ninth resistor R9 is connected to one end of the thermistor NTC through the tenth resistor R10, the other end of the thermistor NTC is grounded, and the common connection between the ninth resistor R9 and the tenth resistor R10 is The contact is connected to the drain of the second NMOS transistor Q3, the gate of the second NMOS transistor Q3 is connected to the common connection point between the thermistor NTC and the tenth resistor R10 through the thirteenth resistor R13, the gate of the second NMOS transistor Q3 is grounded through the capacitor C7, the source of the second NMOS transistor Q3 is connected to one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is grounded through the nineteenth resistor R19, and the common connection point of the sixteenth resistor R16 and the nineteenth resistor R19 is connected to the gate of the first NMOS transistor Q2 as the output end of the temperature compensation circuit.

[0048] During the operation of the MOS tube, its turn-on impedance is greatly affected by temperature. The higher the temperature, the greater the turn-on impedance. If temperature compensation is not performed, the control signal output by the operational amplifier U1 cannot make the first NMOS tube Q2 reach the target impedance state. Although feedback can be performed through the fourth resistor R17, in real time, after the operational amplifier U1 adjusts the output, the actual turn-on impedance of the first NMOS tube Q2 is greater than the corresponding output value of the operational amplifier U1 at this time, so that the clock of the entire constant current circuit is in a repeated adjustment process, the current is not stable, and the working brightness of the LED street lamp is also unstable. Therefore, temperature compensation is required. The thermistor NTC is a negative temperature thermistor, which is arranged at a position close to the first NMOS tube Q2 and is used to collect the temperature of the first NMOS tube Q2. When the temperature rises, the resistance value of the NTC increases, so that the opening of the first NMOS tube is larger, and the current flowing through increases, thereby adjusting the static operating point of the first NMOS tube Q2, so that the first NMOS tube Q2 can maintain the target current required by the LED street lamp when the temperature rises.

[0049] In some embodiments, the ambient light detection circuit includes a twenty-second resistor R22, a twentieth resistor R20, a twenty-first resistor R21, a photoresistor PR and an operational amplifier U2; wherein, one end of the twenty-second resistor R22 is connected to the power supply VCC, the other end of the twenty-second resistor R22 is grounded through the photoresistor PR, the common connection point between the twenty-second resistor R22 and the photoresistor PR is connected to the in-phase terminal of the operational amplifier U2 through the twentieth resistor R20, the inverting terminal of the operational amplifier U2 is connected to the reference voltage Vref (the reference voltage can be set by the voltage of the power supply VCC through a resistor divider circuit, which is the prior art), the in-phase terminal of the operational amplifier U2 is connected to the output terminal of the operational amplifier U2 through the twenty-first resistor R21, and the output terminal of the operational amplifier U2 is connected to the control chip as the output terminal of the ambient light detection circuit.

[0050] Among them, the twentieth resistor R20, the twenty-first resistor R21 and the operational amplifier U2 form a subtraction circuit. When the difference between the in-phase terminal and the inverting terminal of the operational amplifier U2 is less than 0, it indicates that the current ambient light brightness meets the lighting requirements, the control chip controls the voltage adjustment circuit not to work, and the transistor Q4 is cut off; when the difference between the in-phase terminal and the inverting terminal is greater than 0, it indicates that the ambient light intensity does not meet the requirements. At this time, the control chip controls the transistor Q4 to be turned on. At the same time, the control chip sets the PWM control signal (for example, PWM duty cycle) output to the voltage adjustment circuit according to the output of the ambient light detection circuit, that is, the difference output of the operational amplifier U2, thereby setting the output voltage value of the voltage adjustment circuit.

[0051] In some embodiments, the above-mentioned preamplifier circuit includes a twenty-third resistor R23, a capacitor C8, and an op amp U3; wherein one end of the twenty-third resistor R23 is connected to the positive output end of the rectifier circuit, the other end of the twenty-third resistor R23 is grounded through the capacitor C8, the common connection point between the twenty-third resistor R23 and the capacitor C8 is connected to the in-phase end of the op amp U3, the inverting end of the op amp U3 is directly connected to the output end of the op amp U3, and the output end of the op amp U3 serves as the output end of the preamplifier circuit. The twenty-third resistor R23 and the capacitor C8 form an RC filter circuit and play the role of voltage limiting buffer, and the op amp U3 forms a voltage follower, which uses its input high impedance characteristics for isolation, thereby protecting the subsequent circuit.

[0052] In some embodiments, the above-mentioned switch control circuit includes an optocoupler OC1, a twenty-fourth resistor R24, a diode D5 and a transistor Q4; wherein, the collector of the photosensitive transistor of the optocoupler OC1 serves as the input end of the switch control circuit, the emitter of the photosensitive transistor of the optocoupler OC1 serves as the output end of the switch control circuit, one end of the twenty-fourth resistor R24 ​​is connected to the output end of the preamplifier circuit, the other end of the twenty-fourth resistor R24 ​​is connected to the collector of the transistor Q4, the emitter of the transistor Q4 is connected to the positive electrode of the light-emitting diode of the optocoupler OC1, the negative electrode of the light-emitting diode of the optocoupler OC1 is grounded, the base of the transistor Q4 is connected to the negative electrode of the diode D5, and the positive electrode of the diode D5 serves as the control input end of the switch control circuit and is connected to the control chip.

[0053] Through the above structure, when the ambient light brightness meets the lighting requirement, the control chip controls the disconnection of the voltage adjustment circuit and the subsequent circuits, thereby saving energy.

[0054] In some embodiments, a power supply circuit is also included, the power supply circuit includes a first voltage stabilizing circuit and a second voltage stabilizing circuit, the input end of the first voltage stabilizing circuit is connected to the output end of the preamplifier circuit, the input end of the second voltage stabilizing circuit is connected to the output end of the first voltage stabilizing circuit, the first voltage stabilizing circuit also provides power supply VCC, and the second voltage stabilizing circuit supplies power to the control chip. Preferably, the first voltage stabilizing circuit uses a SY8501 chip and its peripheral circuits. Preferably, the second voltage stabilizing circuit uses an MP2451 chip and its peripheral circuits.

[0055] In other embodiments, a current detection circuit for detecting the real-time working brightness of the LED street lamp is also included, which is electrically connected to the control chip; specifically, the control chip determines whether the actual working current of the LED street lamp detected by the current detection circuit is greater than a preset threshold value, and if it is less than or equal to the preset threshold value, the corresponding LED street lamp is determined to be faulty, and a single-lamp alarm message is generated and sent to the administrator's mobile terminal or remote control center for early warning; wherein, the single-lamp alarm message includes the preset number of the corresponding LED street lamp and the section information of the road section where it is located.

[0056] Based on the above-mentioned stepless dimming single lamp inspection LED smart lamp, the present invention also provides a stepless dimming single lamp inspection LED smart lamp group, which includes the above-mentioned stepless dimming single lamp inspection LED smart lamp, the difference is that, see Figure 1, all LED smart lamps in the same group share an ambient light detection circuit, and the ambient light detection circuit is connected to the control chip in any LED smart lamp in the group (preferably, it can be connected to the control chip in the LED smart lamp that is closest to it). Accordingly, once the control chip generates the above control signal according to the current ambient light state, it is synchronously sent to other LED smart lamps in the same group, so that a group of LED smart lamps located in the same section (or the same sub-section) or the same area (or the same sub-area) can adjust the brightness at the same time. Specifically, data communication between control chips can be achieved, and the remote control center can also be used to forward to other lamps in the same group. Among them, the division method of sub-sections or sub-areas can refer to the following embodiments, which will not be repeated here.

[0057] Embodiment 2: Based on the above-mentioned stepless dimming single-lamp inspection LED smart lamp, the present invention also provides a smart city lighting management digital platform equipped with stepless dimming single-lamp inspection LED smart lamp.

[0058] See also Figure 1 The lighting management digital platform specifically includes: a remote control center, multiple groups of LED smart lamp groups, and multiple ambient light detection circuits. Multiple LED smart street lamps located in the same section or the same area are a group of LED smart lamp groups, and a group of LED smart lamp groups corresponds to an ambient light detection circuit, wherein the LED smart lamp is the LED smart lamp group in the above-mentioned embodiment 1, that is, in this embodiment, not the control chip of each LED smart lamp is connected to an ambient light detection circuit, but the same group of LED smart lamps located in the same section or the same area share an ambient light detection circuit, and the ambient light detection circuit is connected to the control chip in any LED smart lamp in the group.

[0059] In some embodiments, the above-mentioned ambient light detection circuit is used to detect the ambient light state of the corresponding road section (or corresponding area), for example, whether the ambient light brightness meets the actual demand. Specifically, the output end of the ambient light detection circuit is connected to the control chip of any LED smart lamp in the corresponding road section (or corresponding area), and the control output end of the control chip is connected to the voltage adjustment circuit, the LED constant current control circuit and the switch opening control circuit. The control chip sends the ambient light state detected by the ambient light detection circuit to the remote control center. The remote control center generates a corresponding control signal according to the ambient light state and sends it to the control chip of each LED smart lamp in the LED smart lamp group in the corresponding road section or corresponding area. The control signal includes the actual operating voltage of all LED street lamps in the corresponding road section (or corresponding area) based on the ambient light state and the target brightness of the corresponding LED street lamp in the current period (pre-set according to the actual demand of the road section or the area), and the target operating current required to achieve the target brightness.

[0060] As mentioned above, when the difference between the in-phase end and the inverting end of U2 in the ambient light detection circuit is less than 0, it indicates that the current ambient light brightness meets the actual requirements. Therefore, when the remote control center receives the output value, it can be identified that the ambient light brightness of the section (or the area) in the current period meets the actual requirements. At this time, there is no operation, and the control chip controls the voltage adjustment circuit not to work; and when the difference between the in-phase end and the inverting end is greater than 0, it indicates that the ambient light intensity does not meet the requirements. At this time, the remote control center will generate a corresponding control signal according to the output value of U2 in the ambient light detection circuit, and send it to the control chips of all smart lamps in the section (or the area). The control chip of each lamp controls the transistor Q4 to turn on according to the control signal, so that the voltage adjustment circuit works, and the control chip sets the PWM control signal output to the voltage adjustment circuit according to the actual working voltage in the control signal, or the output value of U2 in the ambient light detection circuit, thereby setting the output voltage value of the voltage adjustment circuit; at the same time, the control chip determines the resistance value of RP in the ambient light detection circuit according to the above-mentioned target working current, and sends it to the LED constant current control circuit to output the corresponding current.

[0061] In some embodiments, the brightness requirement level requirements for different time periods can be marked in advance for each road section or each area and stored in the control chip. When the control chip sends the current ambient light status, it also sends the brightness requirement level for the current time period. The remote control center can match the corresponding target brightness (pre-set for each brightness requirement level) in the database according to the corresponding brightness requirement level, and then calculate the actual operating voltage and target operating current of all LED street lamps in the corresponding road section or corresponding area based on the target brightness and the above-mentioned difference (the specific calculation method is the existing technology and will not be repeated here), and the control chip of the LED street lamp can obtain the corresponding PWM duty cycle value according to the actual operating voltage, and obtain the resistance value of RP in the LED constant current control circuit according to the target operating current, and adjust the voltage control circuit and the LED constant current control circuit based on these two.

[0062] Of course, in other embodiments, in order to reduce the energy consumption and performance requirements of the control chip, the remote control center may directly calculate the above-mentioned PWM duty cycle value and RP resistance value and send them to the corresponding control chip.

[0063] Specifically, the same road section can be divided into sub-sections in advance through a large number of tests and survey results. Preferably, multiple LED street lights with the same brightness requirement level within a specified distance range (for example, within a preset radius of a specified center point) in the road section are divided into a sub-section. Similarly, multiple LED street lights with the same brightness requirement level within a specified distance range and within the same time period in the same area are divided into a sub-area. In this embodiment, the road section includes an urban traffic section with LED street lights, which has not only vehicle traffic but also pedestrian traffic. The area includes places with LED street lights, no vehicle traffic, but pedestrian traffic, such as a community or a park. Of course, it can be further divided, that is, when the number of LED street lights with different brightness requirement levels within a specified distance range and within the same time period reaches a preset threshold, it means that the specified distance needs to be further optimized, for example, the distance is reduced so that the brightness levels of multiple LED street lights within the same distance in the same time period are the same.

[0064] In some embodiments, after the main control chip receives the above-mentioned control signal, the control circuit is turned on and off (under normal conditions, that is, when the ambient light brightness meets the actual needs, the switch control circuit is disconnected, so that the voltage adjustment circuit does not work, and only when the ambient light brightness does not meet the actual needs, that is, when the brightness of the LED street lamp needs to be adjusted, the switch control circuit is turned on, so that the voltage adjustment circuit works), and the corresponding PWM duty cycle value is obtained according to the actual working voltage to control the voltage adjustment circuit. At the same time, the corresponding RP value is obtained according to the target working current, and the RP value in the LED constant current control circuit is adjusted to adjust the current input to the LED street lamp to adjust the brightness of the corresponding LED smart lamp.

[0065] In some embodiments, the control chip uses the MT32L083 chip. Of course, the chip also has corresponding peripheral circuits, which can be built according to its factory specification, and will not be described in detail here.

[0066] In some embodiments, the voltage adjustment circuit uses the UC3843 chip and its peripheral circuits, as shown in FIG. Figure 4 shown.

[0067] In some embodiments, see Figure 3The LED constant current control circuit includes a digital potentiometer RP, a first resistor R12, a second resistor R14, an operational amplifier U1, a third resistor R15, a fourth resistor R17, a fifth resistor R18, a capacitor C6 and a first NMOS tube Q2; wherein the positive power terminal of the digital potentiometer RP is connected to the power supply VCC, the negative power terminal of the digital potentiometer RP is connected to one end of the second resistor R14 through the first resistor R12, the control input terminal of the digital potentiometer RP is connected to the control output terminal of the control chip, and the second resistor R The other end of 14 is grounded, the non-inverting end of the operational amplifier U1 is connected to the common connection point between the first resistor R12 and the second resistor R14, the inverting end of the operational amplifier U1 is connected to the source of the first NMOS tube Q2 through the fourth resistor R17, the source of the first NMOS tube Q2 is grounded through the fifth resistor R18, the inverting end of the operational amplifier U1 is grounded through the capacitor C6, the output end of the operational amplifier U1 is connected to the gate of the first NMOS tube Q2 through the third resistor R15, and the drain of the first NMOS tube Q2 is connected to the cathode of the LED street lamp.

[0068] A constant current circuit is formed by the above structure, the fifth resistor R18 forms a current detection resistor, and current feedback is performed through the fourth resistor R17. Then, the voltage signals at the in-phase terminal and the inverting terminal of the operational amplifier U1 are compared and controlled to keep the first NMOS tube Q2 in a stable on-state. Different on-states of the first NMOS tube Q2 correspond to different on-resistances, so that the working current of the LED street lamp can be adjusted. The remote control center obtains an actual working voltage of the current LED street lamp and a working current required to achieve a preset target brightness according to the current ambient light state. The actual working voltage is achieved by the control chip controlling the voltage adjustment circuit according to the PWM signal, and the working current is adjusted by controlling the resistance value of RP, so that the operational amplifier controls the first NMOS tube Q2 to work in the corresponding on-state to form a constant working current.

[0069] In some embodiments, the LED constant current control circuit further includes a temperature compensation circuit, which includes a ninth resistor R9, a thermistor NTC, a tenth resistor R10, a thirteenth resistor R13, a sixteenth resistor R16, a nineteenth resistor R19, a capacitor C7, and a second NMOS tube Q3; wherein one end of the ninth resistor R9 is connected to a power supply VCC, the other end of the ninth resistor R9 is connected to one end of the thermistor NTC through the tenth resistor R10, the other end of the thermistor NTC is grounded, and the common connection between the ninth resistor R9 and the tenth resistor R10 is The gate of the second NMOS tube Q3 is connected to the common connection point between the thermistor NTC and the tenth resistor R10 through a thirteenth resistor R13, the gate of the second NMOS tube Q3 is grounded through a capacitor C7, the source of the second NMOS tube Q3 is connected to one end of a sixteenth resistor R16, the other end of the sixteenth resistor R16 is grounded through a nineteenth resistor R19, and the common connection point of the sixteenth resistor R16 and the nineteenth resistor R19 is connected to the gate of the first NMOS tube Q2 as an output end of the temperature compensation circuit.

[0070] During the operation of the MOS tube, its turn-on impedance is greatly affected by temperature. The higher the temperature, the greater the turn-on impedance. If temperature compensation is not performed, the control signal output by the operational amplifier U1 cannot make the first NMOS tube Q2 reach the target impedance state. Although feedback can be performed through the fourth resistor R17, in real time, after U1 adjusts the output, the actual turn-on impedance of the first NMOS tube Q2 is greater than the corresponding output value of the operational amplifier U1 at this time, so that the clock of the entire constant current circuit is in a repeated adjustment process, the current is not stable, and the working brightness of the LED street lamp is also unstable. Therefore, temperature compensation is required. The thermistor NTC is a negative temperature thermistor, which is set at a position close to the NMOS tube and is used to collect the temperature of the first NMOS tube Q2. When the temperature rises, the resistance of the NTC increases, so that the opening of the NMOS tube is larger, and the current flowing through increases, thereby adjusting the static operating point of the first NMOS tube Q2, so that the first NMOS tube Q2 can maintain the target current required by the LED street lamp when the temperature rises.

[0071] In some embodiments, see Figure 5The ambient light detection circuit includes a twenty-second resistor R22, a twentieth resistor R20, a twenty-first resistor R21, a photoresistor PR and an operational amplifier U2; wherein, one end of the twenty-second resistor R22 is connected to the power supply VCC, the other end of the twenty-second resistor R22 is grounded through the photoresistor PR, the common connection point between the twenty-second resistor R22 and the photoresistor PR is connected to the in-phase end of the operational amplifier U2 through the twentieth resistor R20, the inverting end of the operational amplifier U2 is connected to the reference voltage Vref (the reference voltage can be set by the voltage of the power supply VCC through a resistor divider circuit, which is the prior art), the in-phase end of the operational amplifier U2 is connected to the output end of the operational amplifier U2 through the twenty-first resistor R21, and the output end of the operational amplifier U2 is connected to the control chip as the output end of the ambient light detection circuit.

[0072] Among them, the twentieth R20, the twenty-first R21 and the operational amplifier U2 constitute a subtraction circuit. When the difference between the in-phase terminal and the inverting terminal of the operational amplifier U2 is less than 0, it indicates that the current ambient light brightness meets the lighting requirements, the control chip controls the voltage adjustment circuit not to work, and the transistor Q4 is cut off. When the difference between the in-phase terminal and the inverting terminal is greater than 0, it indicates that the ambient light intensity does not meet the requirements. At this time, the control chip will receive the control signal sent by the remote control center, and control the transistor Q4 to turn on according to the control signal. At the same time, the control chip sets the PWM control signal output to the voltage adjustment circuit according to the difference (or actual working voltage) output by the ambient light detection circuit, thereby setting the output voltage value of the voltage adjustment circuit.

[0073] Of course, in other embodiments, in order to further reduce the power consumption and performance requirements of the main control chip, thereby reducing costs, the above-mentioned operational amplifier U2 may not be set, but the common connection point between the 22nd resistor R22 and the photoresistor PR may be directly connected to the control chip through the 20th resistor R20, that is, the other end of the 20th resistor R20 is used as the output end of the ambient light detection circuit, and then the remote control center directly compares the output of the ambient light detection circuit with the preset reference voltage Vref to determine whether the ambient light brightness meets the requirements. Of course, the difference between the in-phase terminal and the inverting terminal of the operational amplifier U2 can also be directly fed back to the remote control center, and then the remote control center will make a judgment directly based on the difference. That is, when the difference is less than 0, it is determined that the current ambient light brightness meets the lighting requirements and no operation is performed (at this time, the voltage adjustment circuit does not work and the transistor Q4 is cut off). When the difference between the in-phase terminal and the inverting terminal is greater than 0, it is determined that the ambient light intensity does not meet the requirements, and the PWM duty cycle is set based on the difference, and a corresponding control signal is generated and sent to the main control chip of the LED street lamp in the corresponding section or area to control the conduction of the transistor Q4, and the adjustment is achieved by controlling the resistance value of RP in the constant current circuit, so that the operational amplifier controls the first NMOS tube Q2 to work in the corresponding on state to form a constant working current.

[0074] In this embodiment, the ambient light status of the current road section or the current area is detected by an ambient light detection circuit, and reported to the remote control center through the control chip of the street lamp or any LED street lamp in the area. The remote control center then adaptively adjusts the actual brightness of each LED street lamp in the current road section or the current area during the current period according to the ambient light status.

[0075] Specifically, the difference between the in-phase input terminal (corresponding to the voltage of the ambient light) and the inverting input terminal (corresponding to the reference voltage Vref of the target brightness preset in the current time period) of the op amp in the ambient light detection circuit represents the ambient light state. If the input voltage of the in-phase input terminal is greater than the reference voltage, it means that the current ambient light brightness meets the actual demand, otherwise it does not meet the demand. When it does not meet the demand, the remote control center automatically calculates the PWM duty cycle value required to achieve the target brightness based on the difference, and generates a PWM control signal to send to the corresponding control chip to adjust the output voltage value of the voltage adjustment circuit and the resistance value of RP in the LED constant current control circuit, thereby realizing the brightness adjustment of the corresponding LED lamp.

[0076] Of course, in other embodiments, a brightness sensor can be directly used as an ambient light detection circuit to detect the ambient brightness value, and then the remote control center can make a real-time judgment (of course, it can also be judged periodically, or in a specified time period, or when the ambient light brightness drops to a specified threshold, start real-time judgment or periodic judgment) whether the ambient light brightness is greater than or equal to a preset brightness threshold. If it is less than the brightness threshold, and it is judged that the ambient light is insufficient, a corresponding PWM control signal is generated and sent to the control chip of all LED street lights in the corresponding section or the corresponding area, so that the control switch control circuit is turned on, and the current output by the LED constant current control circuit is adjusted according to the PWM duty cycle value in the PWM control signal, thereby realizing customized street light control for each section or each area.

[0077] In some embodiments, a power supply circuit is also included, and the power supply circuit includes a first voltage stabilizing circuit and a second voltage stabilizing circuit. The input end of the first voltage stabilizing circuit is connected to the output end of the preamplifier circuit, and the input end of the second voltage stabilizing circuit is connected to the output end of the first voltage stabilizing circuit. The first voltage stabilizing circuit also provides a power supply VCC, and the second voltage stabilizing circuit supplies power to the control chip.

[0078] In other embodiments, it also includes a current detection module for detecting the real-time working brightness of each LED street lamp, which is electrically connected to the control chip; the remote monitoring center is also used to determine whether the actual working current is greater than a preset threshold value based on the actual working current of each LED street lamp sent by the control chip. If it is less than or equal to the preset threshold value, it is determined that the corresponding LED street lamp is faulty, and a single-lamp alarm message is generated and sent to the administrator's mobile terminal, or an early warning is issued through a display screen; wherein the single-lamp alarm message includes a preset number of the corresponding LED street lamp and the section information of the section where it is located.

[0079] In some embodiments, the remote monitoring unit includes a monitoring host for data communication with the control chip, a touch display and a timing circuit; wherein the touch display and the timing circuit are both connected to the monitoring host.

[0080] In some embodiments, the timing circuit uses a Beidou or GPS timing circuit.

[0081] In some embodiments, the touch display is used to display the distribution status of each LED street lamp determined by the monitoring host (each LED street lamp has a corresponding number).

[0082] In other embodiments, if the control chip of a LED street lamp does not feedback monitoring information within a set time (if the ambient light is sufficient, the control chip will also feedback the current ambient light status), it indicates that the current street lamp has a fault and is displayed on the touch display.

[0083] Even in the same road section or the same area, different controls are required due to different surrounding environments. For example, in the same road section, due to the different degrees of obstruction by plants around each street lamp, even if the ambient light brightness is the same or not much different, the required brightness is different for different street lamp illumination ranges. Therefore, centralized control of all LED street lamps in the area still has the problem of not being able to control them individually, resulting in energy waste. In addition, different areas, even with the same ambient brightness, have different brightness requirements due to different application scenarios. For example, for the same road section, the same ambient brightness (or ambient brightness that is not much different), the flow of people and vehicles at different times are different, and the demand for brightness is different.

[0084] For another example, parks have high requirements for safety, so they have high requirements for brightness; compared with parks, communities have lower requirements for safety, so even if the ambient light brightness is the same, their requirements for street light brightness are lower.

[0085] Therefore, the corresponding target brightness can also be set according to the actual brightness requirement level of each sub-section in each section, or each sub-area in each area at different time periods, so that the LED street lights in each sub-section or each sub-area (such as Figure 3 In other words, the LED smart lamp groups corresponding to each road section or each area are further grouped: each road section or each sub-area corresponds to a group. Specifically, when different road sections are divided into sub-sections (or different areas are divided into sub-areas), different brightness requirement levels are marked for different time periods of each sub-section (or sub-area) (specifically, the brightness requirement level can be marked by pre-collecting a certain time period, such as a month, or half a year of vehicle flow / passenger flow to perform brightness requirement level marking), so that the LED street lights in each group can be controlled separately according to the brightness requirement levels of different sub-sections at different time periods. That is, the remote control center receives the current ambient light status of each road section or each area, and when it is identified that the ambient light status is that the ambient light does not meet the actual demand, the brightness requirement level of each sub-section in the corresponding road section, or each sub-area in the corresponding area in the current period and the target brightness corresponding to each brightness requirement level are obtained; then the actual working voltage and target working current required to achieve the target brightness are determined according to the target brightness of each sub-section or each sub-area in the current period, and the output value of the ambient light detection circuit, and the corresponding control signal is generated and sent to the control chip of each LED street lamp in each sub-section in the corresponding road section or each sub-area in the corresponding area, and then the control chip controls the corresponding switch circuit to conduct, and controls the voltage regulation circuit to output the actual working voltage and the LED constant current control circuit to output the target working current according to the control signal. Preferably, the control signal includes the PWM duty cycle value corresponding to the actual working voltage, the RP resistance value of the digital potentiometer RP in the LED constant current control circuit corresponding to the target working current, and the preset number of the LED street lamp group in the corresponding sub-section or the corresponding sub-area.

[0086] In some embodiments, the monitoring host specifically includes:

[0087] A data transceiver module is used to receive the current ambient light status of each road section or each area;

[0088] A first judgment module is used to identify the category of the current ambient light state (including: the current ambient light brightness meets the actual demand; or the current ambient light brightness does not meet the actual demand);

[0089] A first data acquisition module is used to obtain the brightness requirement level and the corresponding target brightness of each sub-section in the corresponding section or each sub-area in the corresponding area in the current time period from the database when the first judgment module identifies that the current ambient light state of any section or any area is: the current ambient light brightness does not meet the actual demand; wherein the brightness requirement levels include: low, medium, and high;

[0090] The second data acquisition module is used to obtain the corresponding actual working voltage and target working current from the database according to the brightness requirement level of each sub-segment or each sub-area in the current period, and generate a corresponding control signal, which is sent to the control chip corresponding to each LED street lamp in each sub-segment in the corresponding section or each sub-area in the corresponding area through the above-mentioned data transceiver module. Among them, the control signal includes the actual working voltage and target working current of the corresponding LED street lamp, and the preset number of the LED street lamp group in the corresponding sub-segment or the corresponding sub-area. Furthermore, the control signal also includes the PWM duty cycle value corresponding to the above-mentioned actual working voltage and the RP value corresponding to the target working current.

[0091] In other embodiments, the data transceiver module is used to receive the current ambient light brightness of each road section or each area; the first judgment module is used to judge whether the current ambient light brightness of each road section or each area is less than or equal to a preset ambient light brightness threshold;

[0092] The first data acquisition module is used to obtain the brightness requirement level of each sub-section in the corresponding section, or each sub-area in the corresponding area in the current time period from the database when the first judgment module determines that the current ambient light brightness of any street lamp or any area is less than or equal to a preset ambient light brightness threshold; wherein the brightness requirement levels include: low, medium, and high.

[0093] In one embodiment, the data transceiver module is further used to obtain the vehicle flow and / or pedestrian flow of each sub-segment at different time periods collected by a data acquisition module (for example, an image acquisition module in a traffic system, which can also directly acquire the vehicle flow or pedestrian flow in the traffic system) disposed in each sub-segment and communicating with the remote control center within a preset acquisition time period; accordingly,

[0094] The monitoring host also includes: a second judgment module, which is used to compare the vehicle flow and / or pedestrian flow of each sub-section in the current time period with a preset flow threshold, and when it is judged that the vehicle flow in any time period is greater than the first vehicle flow threshold, and the pedestrian flow is greater than the first pedestrian flow threshold, the brightness requirement level of the corresponding sub-section in the current time period is marked as high; or when it is judged that the vehicle flow in any time period is greater than the second vehicle flow threshold, or when it is judged that the pedestrian flow in any time period is greater than the second pedestrian flow threshold, the brightness requirement level of the corresponding sub-section in the current time period is marked as medium; or when it is judged that the vehicle flow in any time period is less than or equal to the third vehicle flow threshold, or when it is judged that the pedestrian flow in any time period is less than or equal to the third pedestrian flow threshold, the brightness requirement level of the corresponding sub-section in the current time period is marked as low.

[0095] In other embodiments, for some areas without vehicle traffic, the data transceiver module is further used to obtain the flow of people in each sub-area at different time periods collected by the data acquisition module arranged in each sub-area and communicating with the remote control center within a preset collection time period; accordingly,

[0096] The monitoring host also includes: a third judgment module, which is used to compare the flow of people in each sub-area in the current time period with a preset flow threshold, and when it is judged that the flow of people in any time period is greater than the fourth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as high; or when it is judged that the flow of people in any time period is greater than the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as medium, and the fifth flow threshold is less than the fourth flow threshold; or when it is judged that the flow of people in any time period is less than or equal to the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as low.

[0097] Embodiment 3: Based on the above-mentioned smart city lighting management digital platform equipped with stepless dimming single lamp inspection LED smart lamp, the present invention also provides a control method of LED smart lamp, specifically, it includes the steps of:

[0098] S101, multiple ambient light detection circuits detect the ambient light status of the corresponding road section or the corresponding area in real time, and report it to the remote control center through the main control chip of any LED street lamp in the corresponding road section or the corresponding area.

[0099] In some embodiments, the ambient light detection circuit can report through the main control chip of any LED street lamp within its wireless communication range, or through the main control chip of any street lamp electrically connected to it. Preferably, the main control chip of the LED street lamp closest to it is reported to the remote control center.

[0100] S102, the remote control center generates a corresponding control signal according to the ambient light status, and sends it to the control chips of all LED street lights in the corresponding road section or the corresponding area.

[0101] In some embodiments, the control signal includes the actual operating voltage and target operating current of all LED street lamps in the road section or the area. Furthermore, the control signal may also include: a PWM duty cycle value corresponding to the actual operating voltage, and an RP value corresponding to the target operating current. Specifically, the actual operating voltage and the target operating current, as well as the PWM duty cycle value and the RP value are obtained by referring to the above embodiment and will not be repeated here.

[0102] S203, the main control chip controls the on and off of the corresponding switch control circuit according to the control signal, controls the voltage adjustment circuit to provide the corresponding actual working voltage to the LED street lamp, and controls the LED constant current control circuit to provide the corresponding target working current to the LED street lamp, so as to adjust the brightness of the corresponding LED smart lamp in the road section or area.

[0103] Even in the same road section or the same area, different controls are required due to different surrounding environments. For example, in the same road section, due to the different degrees of obstruction by plants around each street lamp, even if the ambient light brightness is the same or not much different, the required brightness is different for different street lamp illumination ranges. Therefore, centralized control of all street lamps in the area still has the problem of not being able to control them individually, resulting in energy waste. In addition, different areas, even with the same ambient brightness, have different brightness requirements due to different application scenarios. For example, for the same road section, the same ambient brightness (or ambient brightness that is not much different), the flow of people and vehicles at different times are different, and the demand for brightness is different.

[0104] For another example, parks have high requirements for safety, so they have high requirements for brightness; compared with parks, communities have lower requirements for safety, so even if the ambient light brightness is the same, their requirements for street light brightness are lower.

[0105] Therefore, different road sections are divided into sub-sections, and different brightness requirement levels are marked for different time periods of each sub-section (specifically, the brightness requirement level can be marked by pre-collecting the traffic / passenger flow within a certain time period, such as one month, or half a year), so that different sub-sections can be controlled separately according to their brightness requirement levels in different time periods.

[0106] Specifically, the remote control center receives the current ambient light status of each road section or each area, and when it is identified that the current ambient light brightness does not meet the actual brightness requirement, it obtains the brightness requirement level and the corresponding target brightness of each sub-section in the corresponding road section, or each sub-area in the corresponding area in the current time period from the database, and generates corresponding control signals and sends them to the control chips of each LED street lamp in each sub-section in the corresponding road section or each sub-area in the corresponding area.

[0107] Preferably, the target brightness corresponding to any sub-section with the highest brightness requirement level in the current period among all sub-sections of the entire section is taken as the actual brightness requirement of the section. Similarly, the target brightness corresponding to any sub-section with the highest brightness requirement level in the current period among all sub-sections of the entire area is taken as the actual brightness requirement of the area.

[0108] In one embodiment, the vehicle flow and / or pedestrian flow of each sub-segment at different time periods are collected within a preset collection time period by a data collection module (for example, an image collection module in a traffic system, and of course the vehicle flow or pedestrian flow can also be directly obtained from the traffic system) which is set in each sub-segment and communicates data with the remote control center; the remote control center compares the vehicle flow and / or pedestrian flow of each sub-segment in the current time period with the preset flow threshold, and when it is determined that the vehicle flow in any time period is greater than the first vehicle flow threshold, and the pedestrian flow is greater than the first pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-segment is marked as high; or when it is determined that the vehicle flow in any time period is greater than the second vehicle flow threshold, or when it is determined that the pedestrian flow in any time period is greater than the second pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-segment is marked as medium; or when it is determined that the vehicle flow in any time period is less than or equal to the third vehicle flow threshold, or when it is determined that the pedestrian flow in any time period is less than or equal to the third pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-segment is marked as low.

[0109] In other embodiments, for some areas without traffic, the remote control center can collect the flow of people in each sub-area at different time periods within a preset collection time period through a data collection module set in each sub-area and communicating data with the remote control center. The remote control center will compare the flow of people in each sub-area in the current time period with the preset flow threshold, and when it is judged that the flow of people in any time period is greater than the fourth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as high; or when it is judged that the flow of people in any time period is greater than the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as medium, and the fifth flow threshold is less than the fourth flow threshold; or when it is judged that the flow of people in any time period is less than or equal to the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as low.

[0110] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0111] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a computer terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0112] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A digital platform for smart city lighting management equipped with stepless dimming single-lamp inspection LED smart lamps, characterized by: It includes a remote control center, multiple groups of LED smart lamps, and multiple ambient light detection circuits. Multiple LED smart street lamps located in the same section or the same area are grouped together and correspond to one ambient light detection circuit. The LED smart lamp includes: a control chip, a rectifier circuit, a front circuit, a switch control circuit, a voltage adjustment circuit, an LED constant current control circuit, and an LED street lamp; the input end of the rectifier circuit is externally connected to the mains, the output end of the rectifier circuit is connected to the input end of the front circuit, the output end of the front circuit is connected to the input end of the switch control circuit, the output end of the switch control circuit is connected to the input end of the voltage adjustment circuit, the output end of the voltage adjustment circuit is connected to the positive pole of the LED street lamp, the negative pole of the LED street lamp is connected to the input end of the LED constant current control circuit, and the control output end of the control chip is respectively connected to the input ends of the voltage adjustment circuit, the LED constant current control circuit, and the switch control circuit; The ambient light detection circuit is used to detect the ambient light state of the corresponding road section or the corresponding area, and the output end of the ambient light detection circuit is connected to the control chip of any LED street lamp in the road section or the area; the control chip sends the ambient light state detected by the ambient light detection circuit to the remote control center; wherein the ambient light state includes that the ambient light brightness meets the actual demand, or the ambient light brightness does not meet the actual demand; The remote control center generates a corresponding control signal according to the ambient light state sent by the current control chip and sends it to each control chip in the road section or the corresponding area corresponding to the current control chip, so that the control chip controls the on and off of the switch control circuit, and controls the LED constant current control circuit to output a corresponding current according to the control signal to adjust the brightness of the corresponding LED street lamp; the control signal includes: based on the ambient light state and the target brightness of the corresponding LED street lamp in the current period, the actual operating voltage of all LED street lamps in the corresponding road section or the corresponding area, and the target operating current required to achieve the target brightness; Specifically, the remote control center receives the current ambient light status of each road section or each area, and when it is identified that the ambient light status is that the ambient light does not meet the actual demand, the remote control center obtains the brightness requirement level of each sub-section in the corresponding road section, or each sub-area in the corresponding area in the current time period and the target brightness corresponding to each brightness requirement level; then, according to the target brightness of each sub-section or each sub-area in the current time period, and the output value of the ambient light detection circuit, the actual operating voltage and target operating current required to achieve the target brightness are determined, and a corresponding control signal is generated and sent to the control chip of each LED street lamp in the corresponding sub-section or the corresponding sub-area. The control chip controls the conduction of the switch control circuit, and controls the voltage adjustment circuit to output the actual working voltage and the LED constant current control circuit to output the target working current according to the control signal; the control signal includes the PWM duty cycle value corresponding to the actual working voltage, the RP resistance value of the digital potentiometer RP in the LED constant current control circuit corresponding to the target working current, and the preset number of the LED street lamp group in the corresponding sub-section or the corresponding sub-area; wherein the sub-section or the sub-area is a sub-section or a sub-area in which multiple LED street lamps with the same brightness requirement level within a specified distance range and in the same time period are divided into a plurality of LED street lamps.

2. According to claim 1, the smart city lighting management digital platform equipped with stepless dimming single lamp inspection LED smart lamps is characterized in that It also includes: a data acquisition module which is arranged in each sub-section and communicates data with the remote control center, the remote control center receives the vehicle flow and / or pedestrian flow of each sub-section in different time periods collected by the data acquisition module within a preset collection time period, and when it is judged that the vehicle flow in any time period is greater than the first vehicle flow threshold, and the pedestrian flow is greater than the first pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-section is marked as high, and the corresponding first target brightness is set; or when it is judged that the vehicle flow in any time period is greater than the second vehicle flow threshold, or when it is judged that the pedestrian flow in any time period is greater than the second pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-section is marked as medium, and the corresponding second target brightness is set; or when it is judged that the vehicle flow in any time period is less than or equal to the third vehicle flow threshold, or when it is judged that the pedestrian flow in any time period is less than or equal to the third pedestrian flow threshold, the brightness requirement level of the current time period of the corresponding sub-section is marked as low, and the corresponding third target brightness is set.

3. According to claim 1, the smart city lighting management digital platform equipped with stepless dimming single lamp inspection LED smart lamps is characterized in that Also includes: The smart city lighting management digital platform also includes a data acquisition module that is arranged in each sub-area and communicates data with the remote control center. The remote control center receives the flow of people in each sub-area at different time periods collected by the data acquisition module within a preset collection time period, and when it is determined that the flow of people in any time period is greater than the fourth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as high, and the corresponding first target brightness is set; or when it is determined that the flow of people in any time period is greater than the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as medium, and the corresponding second target brightness is set, and the fifth flow threshold is less than the fourth flow threshold; Alternatively, when it is determined that the flow of people in any time period is less than or equal to the fifth flow threshold, the brightness requirement level of the current time period of the corresponding sub-area is marked as low, and the corresponding third target brightness is set.

4. The smart city lighting management digital platform equipped with stepless dimming single lamp inspection LED smart lamps according to claim 2 or 3, characterized in that: The LED smart lamp also includes a current detection module for detecting the real-time working current of the LED street lamp, which is electrically connected to the control chip; the control chip sends the actual working current detected by the current detection module to the remote control center, and the remote control center determines whether the actual working current of each LED street lamp is greater than a preset threshold value. If it is less than or equal to the preset threshold value, the corresponding LED street lamp is determined to be faulty and a single-lamp alarm message is generated; the single-lamp alarm message includes the preset number of the corresponding LED street lamp and the section information of the road section where it is located.

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