CN105208732A - Comprehensive LED street lamp management system - Google Patents
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Abstract
The invention provides a comprehensive LED street lamp management system which comprises a master control center, a wireless access point, a first wireless communication unit, a front end convergence unit, a plurality of on-site sub-control units and a voltage stabilization and power supply unit. Wireless management on a street lamp system is achieved. Due to the fact that an intelligent driving unit, a driving protection unit, a monitoring unit and an on-site communication unit are arranged, the function of an LED street lamp system is expanded, and the monitoring efficiency on the LED street lamp system is improved.
Description
Technical Field
The invention relates to a street lamp management system, in particular to a comprehensive LED street lamp management system.
Background
The LED street lamp has the advantages of environmental protection, no pollution, low power consumption, high lighting effect, good controllability and the like, but the LED street lamp on the street in China is mainly a wired LED street lamp system at present, has the defects of complex hardware wiring, high upgrading cost, inconvenient maintenance and the like, and although some street lamps try to carry out wireless management and monitoring, the street lamps still have the problems of single function, high energy consumption, low monitoring efficiency and the like.
Disclosure of Invention
The purpose of the invention is realized by the following technical scheme.
According to an embodiment of the present invention, there is provided an integrated LED street lamp management system, the system including: the system comprises a main control center, a wireless access point, a first wireless communication unit, a front end aggregation unit, a plurality of field sub-control units and a voltage-stabilizing power supply unit, wherein the main control center is in wireless communication connection with the first wireless communication unit through the wireless access point; wherein,
the main control center is used for carrying out data analysis according to the monitoring data transmitted by the field sub-control unit and sending a control instruction to the field sub-control unit according to a data analysis result;
the wireless access point is used for providing remote connection between the main control unit and the first wireless communication unit;
the first wireless communication unit is used for providing wireless connection from the front-end convergence unit to the wireless access point;
the front end convergence unit is used for receiving convergence and scheduling data transmission and wireless connection between the field sub-control unit and the first wireless communication unit;
the field sub-control unit is used for providing field management, driving and monitoring on the LED street lamp; and
and the voltage-stabilizing power supply unit is used for supplying power to the front-end convergence unit and the field sub-control unit and controlling the output current.
According to the embodiment of the invention, each field sub-control unit comprises a field processing unit, a second wireless communication unit, an intelligent driving unit, a driving protection unit, an LED street lamp, a monitoring unit and a field communication unit, wherein the field processing unit is respectively connected with the second wireless communication unit, the intelligent driving unit and the field communication unit; wherein,
the field processing unit is used for providing control and signal conversion for each part of the field sub-control unit;
the second wireless communication unit is used for providing wireless connection between the field sub-control unit and the front end convergence unit;
the intelligent driving unit is used for providing constant current driving and temperature control protection for the LED street lamp;
the drive protection unit provides safety protection for the intelligent drive unit;
the monitoring unit is used for acquiring the state parameter information and the real-time road condition information of the LED street lamp in real time; and
the field communication unit is used for carrying out real-time field communication with a road running vehicle.
According to an embodiment of the present invention, the main control center includes a data storage unit, a data analysis unit, an intelligent instruction generation unit, and an instruction distribution unit, wherein,
the data storage unit is used for storing monitoring data received from the field sub-control unit and a preset instruction mapping table, and the instruction mapping table is used for recording optimal operation instructions corresponding to different monitoring data analysis results;
the data analysis unit is used for analyzing the received monitoring data;
the intelligent instruction generating unit is used for generating an operating instruction for the field sub-control unit according to an analysis result of the monitoring data and a storage instruction of the instruction mapping table;
the instruction distribution unit is used for issuing the operation instruction to the field sub-control unit.
According to the embodiment of the invention, the data analysis unit comprises an LED street lamp operation state detection and analysis subunit, an LED street lamp lumen attenuation detection and analysis subunit, a road traffic condition detection and analysis subunit and a constant illumination dimming analysis subunit; wherein,
the LED street lamp running state detection and analysis subunit is used for comparing the current and voltage signals of the LED street lamp obtained in real time by the monitoring unit with a set current and voltage standard value to generate a detection and analysis result about the running state;
the detection and analysis of the lumen attenuation of the LED street lamp are realized by comparing the lumen intensity value of the LED street lamp transmitted by the monitoring unit with the set lumen intensity value, analyzing to obtain whether the lumen attenuation of the LED street lamp exceeds the set threshold value, and generating a detection and analysis result about the lumen attenuation;
the road traffic condition detection and analysis is to count vehicles at the positions of the LED street lamps in the past through the data transmitted by the monitoring unit, analyze the basic conditions of the road traffic of the whole area provided with the LED street lamps, and generate a detection and analysis result about the road traffic condition.
The constant illumination dimming analysis subunit compares the real-time ambient illumination intensity data transmitted by the monitoring unit with the set ambient illumination intensity to generate a detection analysis result about the ambient related illumination.
According to an embodiment of the present invention, the intelligent driving unit of the field sub-control unit includes: the device comprises a driving circuit, a voltage drop conversion unit, a timing balance unit, a timing control unit, an average current acquisition unit, a PWM (pulse-width modulation) signal generation unit, a temperature response triode and a temperature regulation signal generation circuit; the timing balance unit is respectively connected with the drive circuit, the timing control unit and the average current acquisition unit; the voltage drop conversion unit is respectively connected with the drive circuit and the average current acquisition unit; and the drain electrode of the temperature response triode is connected with the cathode of the LED, the source electrode of the temperature response triode is connected with the PWM signal generating unit, and the grid electrode of the temperature response triode is connected with the temperature adjusting signal generating circuit.
According to an embodiment of the present invention, the drive protection unit includes an interpolation comparison circuit and an interpolation signal generation circuit; the output end of the interpolation comparison circuit is connected with the driving circuit of the intelligent driving unit, and the negative input end of the interpolation comparison circuit is grounded; the first input end of the interpolation signal generating circuit is connected with the voltage drop conversion unit of the intelligent driving unit, the second input end of the interpolation signal generating circuit is connected with the first external reference voltage, and the output end of the interpolation signal generating circuit is connected with the first input end of the interpolation comparison circuit; the second input end of the interpolation comparison circuit is connected with the second external reference voltage, and the negative input end of the interpolation comparison circuit is grounded.
According to the embodiment of the invention, the monitoring unit comprises a current and voltage monitoring unit, a brightness monitoring unit, a microwave monitoring unit and an environment temperature monitoring unit;
the current and voltage monitoring unit is used for acquiring current and voltage parameters of the LED street lamp in real time and comprises a current sampling unit, a smoothing unit and a buffer unit which are connected in sequence; the current sampling unit is used for sampling the current in the LED street lamp, the smoothing unit is used for smoothing the sampled current signal, and the buffer unit is used for buffering the smoothed signal and inputting the buffered signal to the field processing unit;
the real-time brightness monitoring unit is used for detecting the actual illuminance of the LED street lamp and crossly comparing the actual illuminance with a set value to obtain the lumen attenuation degree of the LED street lamp, detecting the illuminance of the external environment and inputting the detection result into the field processing unit;
the environment temperature monitoring unit is used for acquiring the environment temperature of the position where the LED street lamp is located in real time and inputting a detection result to the field processing unit;
and the microwave monitoring unit is used for detecting the moving direction, speed and distance information of the vehicle under the corresponding LED street lamp and inputting the detection result into the field processing unit.
According to an embodiment of the present invention, the field communication unit includes: a light emitting unit for emitting LED visible light having illumination and communication functions; a light receiving unit for receiving a visible light signal emitted from a vehicle; and the network signal conversion unit is used for converting the received visible light signal into a frame data format which can be used for data exchange of the existing network.
According to an embodiment of the present invention, the regulated power supply unit includes a regression control circuit, an output ac-dc conversion circuit, and a power response control unit, the regression control circuit is connected to the output ac-dc conversion circuit, and the output ac-dc conversion circuit is connected to the power response control unit.
The comprehensive LED street lamp management system comprises a master control center, a wireless access point, a first wireless communication unit, a front end convergence unit, a plurality of field sub-control units and a voltage-stabilizing power supply unit; the intelligent street lamp system has the advantages that wireless management of the street lamp system is achieved, functions of the LED street lamp system are expanded through the arrangement of the intelligent driving unit, the driving protection unit, the monitoring unit and the field communication unit, and monitoring efficiency of the LED street lamp system is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an integrated LED street lamp management system according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a field sub-control unit according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a key center architecture according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a front end convergence unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an intelligent drive unit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a temperature adjustment signal generating circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a structure of a driving protection unit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a monitoring unit according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a field communication unit according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a voltage-stabilized power supply unit according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an embodiment of the present invention, an integrated LED street lamp management system is provided, as shown in fig. 1, the system includes: the system comprises a main control center, a wireless access point, a first wireless communication unit, a front end aggregation unit, a plurality of field sub-control units and a voltage-stabilizing power supply unit, wherein the main control center is in wireless communication connection with the first wireless communication unit through the wireless access point; wherein,
the main control center is used for carrying out data analysis according to the monitoring data transmitted by the field sub-control unit and sending a control instruction to the field sub-control unit according to a data analysis result;
the wireless access point is used for providing remote connection between the main control unit and the first wireless communication unit;
the first wireless communication unit is used for providing wireless connection from the front-end convergence unit to the wireless access point;
the front end convergence unit is used for receiving convergence and scheduling data transmission and wireless connection between the field sub-control unit and the first wireless communication unit;
the field sub-control unit is used for providing field management, driving and monitoring on the LED street lamp; and
and the voltage-stabilizing power supply unit is used for supplying power to the front-end convergence unit and the field sub-control unit and controlling the output current.
According to an embodiment of the present invention, as shown in fig. 2, each field sub-control unit at least includes a field processing unit, a second wireless communication unit, an intelligent driving unit, a driving protection unit, an LED street lamp, a monitoring unit and a field communication unit, wherein the field processing unit is respectively connected to the second wireless communication unit, the intelligent driving unit and the field communication unit, the second wireless communication unit is connected to the front end convergence unit, the driving protection unit is connected to the intelligent driving unit, an output end of the intelligent driving unit is electrically connected to the LED street lamp, the LED street lamp is connected to an input end of the monitoring unit, and an output end of the monitoring unit is electrically connected to an input end of the second wireless communication unit; wherein,
the field processing unit is used for providing control and signal conversion for each part of the field sub-control unit;
the second wireless communication unit is used for providing wireless connection between the field sub-control unit and the front end convergence unit; the second wireless communication unit may be based on a different communication protocol than the first wireless communication unit, for example, but not limited to, the first wireless communication unit may be based on a 4G cellular communication protocol, a WLAN protocol, or a satellite communication protocol, and the second wireless communication unit may be based on a WLAN protocol, a ZIGBEE protocol, or a bluetooth protocol.
The intelligent driving unit is used for providing constant current driving and temperature control protection for the LED street lamp;
the drive protection unit provides safety protection for the intelligent drive unit;
the monitoring unit is used for acquiring the state parameter information and the real-time road condition information of the LED street lamp in real time; and
the field communication unit is used for carrying out real-time field communication with the road running vehicles, and comprises but is not limited to receiving a running route street lamp starting request and a road condition information request sent by the vehicles, sending road condition information and traffic indication information to the running vehicles and the like.
According to an embodiment of the present invention, as shown in fig. 3, the main control center includes a data storage unit, a data parsing unit, an intelligent instruction generating unit, and an instruction distributing unit, wherein,
the data storage unit is used for storing monitoring data received from the field sub-control unit and a preset instruction mapping table, and the instruction mapping table is used for recording optimal operation instructions corresponding to different monitoring data analysis results;
the data analysis unit is used for analyzing the received monitoring data;
the intelligent instruction generating unit is used for generating an operating instruction for the field sub-control unit according to an analysis result of the monitoring data and a storage instruction of the instruction mapping table;
the instruction distribution unit is used for issuing the operation instruction to the field sub-control unit.
According to the embodiment of the invention, the data analysis unit comprises an LED street lamp operation state detection and analysis subunit, an LED street lamp lumen attenuation detection and analysis subunit, a road traffic condition detection and analysis subunit and a constant illumination dimming analysis subunit; wherein,
the LED street lamp running state detection and analysis subunit is used for comparing the current and voltage signals of the LED street lamp obtained in real time by the monitoring unit with a set current and voltage standard value to generate a detection and analysis result about the running state;
the detection and analysis of the lumen attenuation of the LED street lamp are realized by comparing the lumen intensity value of the LED street lamp transmitted by the monitoring unit with the set lumen intensity value, analyzing to obtain whether the lumen attenuation of the LED street lamp exceeds the set threshold value, and generating a detection and analysis result about the lumen attenuation;
the road traffic condition detection and analysis is to count vehicles at the positions of the LED street lamps in the past through the data transmitted by the monitoring unit, analyze the basic conditions of the road traffic of the whole area provided with the LED street lamps, and generate a detection and analysis result about the road traffic condition.
The constant illumination dimming analysis subunit compares the real-time ambient illumination intensity data transmitted by the monitoring unit with the set ambient illumination intensity to generate a detection analysis result about the ambient related illumination.
After the on-site sub-control unit receives the operation instruction sent by the instruction distribution unit, for example, when receiving an instruction related to the road traffic condition, the on-off control is immediately carried out on the LED street lamp; wherein, on-off control is used for controlling LED street lamp: when the road is idle, turning on partial LED street lamps at intervals; when a vehicle is detected to enter, the LED street lamps and the like are sequentially turned on, and when an instruction related to ambient illumination is received, the illumination intensity is increased or decreased, and the like.
According to an embodiment of the present invention, as shown in fig. 4, the front end convergence unit includes a power supply circuit, an RS485 communication circuit, a wireless transceiver circuit, and a communication chip unit; the power supply circuit comprises a 48V direct current to 5V direct current circuit and a 5V to 3.3V direct current circuit, wherein the 48V direct current to 5V direct current circuit is a power supply circuit of the RS485 communication circuit, and the 5V to 3.3V direct current circuit is a power supply circuit of the communication chip unit; the RS485 communication circuit is used for interacting with the first wireless communication unit, the wireless transceiver circuit is a communication circuit between the front-end convergence unit and the second wireless communication unit, and the communication chip unit adopts the same communication protocol as the second wireless communication unit.
According to an embodiment of the present invention, as shown in fig. 5, the intelligent driving unit of the field sub-control unit includes: the device comprises a driving circuit, a voltage drop conversion unit, a timing balance unit, a timing control unit, an average current acquisition unit, a PWM (pulse-width modulation) signal generation unit, a temperature response triode and a temperature regulation signal generation circuit; the timing balance unit is respectively connected with the drive circuit, the timing control unit and the average current acquisition unit; the voltage drop conversion unit is respectively connected with the drive circuit and the average current acquisition unit; and the drain electrode of the temperature response triode is connected with the cathode of the LED, the source electrode of the temperature response triode is connected with the PWM signal generating unit, and the grid electrode of the temperature response triode is connected with the temperature adjusting signal generating circuit.
The timing balance unit is used for outputting a conducting signal through the driving circuit and controlling the time from the minimum value to the current average value in the voltage drop conversion unit to be equal to the time from the current average value to the peak current; the timing control unit is used for outputting a switching signal through the driving circuit; the PWM signal generating unit generates PWM signals with duty ratios reversely related to the load current according to the average current generated by the average current acquiring unit and is used for controlling a switching device in the voltage drop converting unit; the temperature adjusting signal generating circuit is used for generating a voltage pulse signal with the duty ratio inversely related to the ambient temperature according to the ambient temperature acquired by the monitoring unit and controlling the temperature response triode.
The voltage drop conversion unit is used for carrying out DC-DC voltage drop conversion on direct-current input voltage and consists of a triode Q1, an inductor L1, a capacitor C1 and a diode D1; the drain electrode of the triode Q1 is connected with the power supply after passing through the inductor L1 and the capacitor C1 in sequence, and the drain electrode of the triode Q1 is connected with the anode of the diode D1; the cathode of the diode D1 is connected with the power supply.
The timing balance unit is composed of a first inverter, an up-down counter and an OR gate; wherein, the output end of the up-down counter is connected with the input end of the OR gate; the output end of the OR gate is connected with the input ends of the driving circuit and the first inverter; the output end of the first inverter is connected with the input end of the up-down counter.
The timing control unit consists of a second inverter, a third inverter, an addition counter and an AND gate; the input end of the second inverter is connected with the output end of the OR gate, and the output end of the second inverter is connected with the addition signal end of the addition counter; the input end of the third inverter is connected with the output end of the OR gate, and the output end of the third inverter is connected with the input end of the addition counter; the output end of the addition counter is connected with the input end of the AND gate; the output end of the AND gate is connected with the input end of the OR gate.
The PWM signal generating unit comprises an interpolation resistor, an error amplifier and an RS trigger; wherein: the inverting input end of the error amplifier is connected with one end of the interpolation resistor and the source electrode of the temperature response triode, the other end of the interpolation resistor is grounded, the non-inverting input end of the error amplifier is connected with the reference voltage, the output end of the error amplifier is connected with the R end of the RS trigger, the RS trigger is connected with the clock signal, and the Q end of the RS trigger is connected with the voltage drop conversion unit and outputs the PWM signal.
The temperature adjustment signal generation circuit includes: the device comprises an operation unit, a temperature current signal generation unit, a direct current reduction unit and a signal conversion unit; wherein:
the operation unit is used for normally operating the temperature current signal generation unit under the condition that the potential of an internal node of the temperature current signal generation unit is abnormal when the operation unit is electrified;
the temperature current signal generating unit is used for generating a current signal which is in phase correlation with the ambient temperature according to the ambient temperature acquired by the monitoring unit;
the direct current reduction unit is used for reducing a direct current component of the current signal;
the signal conversion unit is used for converting the current signal output after being processed by the direct current reduction unit, and generating a voltage pulse signal with a duty ratio inversely related to the ambient temperature to control the temperature response triode.
According to the preferred embodiment of the present invention, as shown in fig. 6, the operation unit includes five MOS transistors M9-M12, M27; wherein: the drain of the MOS transistor M27 is connected to the source of the MOS transistor M27 and the source of the MOS transistor M10 and connected to a power supply voltage, the gate of the MOS transistor M27 is connected to the gate of the MOS transistor M9, the drain of the MOS transistor M10, the gate of the MOS transistor M12 and the drain of the MOS transistor M11, the drain of the MOS transistor M9 is connected to the source of the MOS transistor M9, the gate of the MOS transistor M10, the source of the MOS transistor M12 and the source of the MOS transistor M11 and connected to ground, the gate of the MOS transistor M11 serves as a first output end of the operation unit, and the drain of the MOS transistor M12 serves as a second output end of the operation unit.
According to the preferred embodiment of the present invention, the temperature current signal generating unit includes a resistor R1, eight MOS transistors M1-M8, and two triodes Q1-Q2; wherein: the source of the MOS transistor M1 is connected to the source of the MOS transistor M2 and connected in parallel to a power supply voltage, the drain of the MOS transistor M1 is connected to the source of the MOS transistor M3, the gate of the MOS transistor M1 and the gate of the MOS transistor M2 and serves as a first output terminal of the temperature current signal generating unit, the drain of the MOS transistor M2 is connected to the source of the MOS transistor M4, the drain of the MOS transistor M3 is connected to the drain of the MOS transistor M5, the gate of the MOS transistor M3, the gate of the MOS transistor M4 and the second output terminal of the operating unit and connected to a second output terminal of the temperature current signal generating unit, the drain of the MOS transistor M4 is connected to the drain of the MOS transistor M6, the gate of the MOS transistor M6 and the gate of the MOS transistor M5, the source of the MOS transistor M5 is connected to the drain of the MOS transistor M7, the source of the MOS transistor M6 is connected to the drain of the MOS transistor M8, the gate of the MOS transistor M8, the gate of the transistor M7 and the first output terminal of the transistor M7, and the emitter 7 is connected to the triode 36, the source of the MOS transistor M8 is connected to the emitter of the transistor Q2, and the base of the transistor Q1 is connected to the base of the transistor Q2, the collector of the transistor Q1, and the collector of the transistor Q2, and to ground.
According to a preferred embodiment of the present invention, the dc reduction unit includes eight MOS transistors M13-M14, M21-M26; wherein: the source of the MOS transistor M13 is connected with power supply voltage, the gate of the MOS transistor M13 is connected with the first output end of the temperature current signal generating unit, the drain of the MOS transistor M13 is connected with the source of the MOS transistor M14, the gate of the MOS transistor M14 is connected with the second output end of the temperature current signal generating unit, the drain of the MOS transistor M14 is connected with the drain of the MOS transistor M23, the drain of the MOS transistor M25 and the gate of the MOS transistor M25 and serves as the first output end of the direct current reduction unit, the gate of the MOS transistor M23 is connected with the gate of the MOS transistor M21 and the drain of the MOS transistor M21 and receives bias current, the source of the MOS transistor M21 is connected with the drain of the MOS transistor M22, the grid of MOS pipe M22 and the grid of MOS pipe M24 link to each other, and the source of MOS pipe M23 links to each other with the drain-source resistance of MOS pipe M24, and the source of MOS pipe M22 and the source of MOS pipe M24 and the source of MOS pipe M26 link to each other and ground connection, and the source of MOS pipe M25 and the drain-source resistance of MOS pipe M26 and the grid of MOS pipe M26 link to each other and are regarded as the second output of direct current reduction unit.
According to the preferred embodiment of the present invention, the signal conversion unit comprises a resistor R2, an operational amplifier and six MOS transistors M15-M18, M19-M20; wherein: the source of the MOS transistor M15 is connected to the source of the MOS transistor M17 and connected in parallel to a power supply voltage, the drain of the MOS transistor M15 is connected to the source of the MOS transistor M16, the gate of the MOS transistor M17 and the gate of the MOS transistor M15, the drain of the MOS transistor M17 is connected to the source of the MOS transistor M18, the drain of the MOS transistor M16 is connected to the drain of the MOS transistor M19, the gate of the MOS transistor M18 and the gate of the MOS transistor M16, the gate of the MOS transistor M19 is connected to the first output terminal of the dc reduction unit, the source of the MOS transistor M19 is connected to the drain of the MOS transistor M20, the gate of the MOS transistor M20 is connected to the second output terminal of the dc reduction unit, the source of the MOS transistor M20 is connected in parallel to one end of the resistor R2, the other end of the resistor R2 is connected to the drain of the MOS transistor M18 and to the non-phase input terminal of the operational amplifier, the inverting input terminal receives a triangular wave voltage, the, for controlling the temperature responsive transistor.
According to an embodiment of the present invention, as shown in fig. 7, the drive protection unit includes an interpolation comparison circuit and an interpolation signal generation circuit; the output end of the interpolation comparison circuit is connected with the driving circuit of the intelligent driving unit, and the negative input end of the interpolation comparison circuit is grounded; the first input end of the interpolation signal generating circuit is connected with the voltage drop conversion unit of the intelligent driving unit, the second input end of the interpolation signal generating circuit is connected with the first external reference voltage Vref1, and the output end of the interpolation signal generating circuit is connected with the first input end of the interpolation comparison circuit; the second input of the interpolation comparison circuit is connected with the second external reference voltage Vref2, and the negative input is grounded.
According to the preferred embodiment of the invention, the interpolation comparison circuit is composed of an interpolation resistor R1, a second comparator U2 and a tristate output gate Z; the input end of the tristate output gate Z is grounded through R1, the output end of the tristate output gate Z is connected with the non-inverting input end of the comparator, and the output end of the tristate output gate Z is connected with the grid electrode of the triode Q1;
according to a preferred embodiment of the present invention, the interpolation signal generation circuit is composed of an interpolation timing control circuit and a signal generation circuit; the interpolation timing control circuit consists of a current source I, an inverter N1, MOS tubes M1 and M2, a second capacitor C2 and a first comparator U1; the drain of M1 is connected with power supply Vcc through current source I, its source is connected with drain of M2, its gate is connected with enable end of tristate output gate Z, its gate is also connected with gate of M2 through inverter N1; the source of M2 is grounded; the connection point of the source of the M1 and the drain of the M2 is grounded through a second capacitor C2, and the connection point is also connected with the non-inverting input end of a first comparator U1; the inverting input of the first comparator U1 is connected to a first reference voltage Vref 1;
the signal generating circuit consists of an exclusive-or gate XOR, a first counter B1 and a second counter B2; the first counter B1 and the second counter B2 are both composed of D flip-flops; the input end of the first counter B1 is connected with the output end of the first comparator U1, the Q non-output end thereof is connected with the D input end, and the Q output end thereof is connected with one input end of the exclusive-OR gate XOR; the input end of the second counter B2 is connected with the output end VG of the driving circuit, the Q non-output end thereof is connected with the D input end, and the Q output end thereof is connected with the other input end of the exclusive-OR gate XOR; the output end of the exclusive or gate XOR is connected with the enabling end of the tri-state output gate Z.
According to an embodiment of the present invention, as shown in fig. 8, the monitoring unit at least includes a current and voltage monitoring unit, a brightness monitoring unit, a microwave monitoring unit and an ambient temperature monitoring unit;
the current and voltage monitoring unit is used for acquiring current and voltage parameters of the LED street lamp in real time and comprises a current sampling unit, a smoothing unit and a buffer unit which are connected in sequence; the current sampling unit is used for sampling the current in the LED street lamp, the smoothing unit is used for smoothing the sampled current signal, and the buffer unit is used for buffering the smoothed signal and inputting the buffered signal to the field processing unit;
the real-time brightness monitoring unit is used for detecting the actual illuminance of the LED street lamp and crossly comparing the actual illuminance with a set value to obtain the lumen attenuation degree of the LED street lamp, detecting the illuminance of the external environment and inputting the detection result into the field processing unit;
the environment temperature monitoring unit is used for acquiring the environment temperature of the position where the LED street lamp is located in real time and inputting a detection result to the field processing unit;
and the microwave monitoring unit is used for detecting the moving direction, speed and distance information of the vehicle under the corresponding LED street lamp and inputting the detection result into the field processing unit.
After receiving the detection results, the field processing unit sends the current detection results and the environment temperature detection results to the intelligent driving unit, meanwhile, the current detection results, the environment temperature detection results, the real-time brightness detection results and the vehicle detection results are sent to the front end convergence unit through the second wireless communication unit, then sent to the main control center through the front end convergence unit, analyzed by the main control center to give on-off control information, then sent to the front end convergence unit, and then transmitted to the second wireless communication unit and the intelligent driving unit through the front end convergence unit.
According to the embodiment of the invention, the microwave monitoring unit specifically comprises a microwave signal transmitting unit, a return signal receiving unit, a return signal extracting unit, a speed calculating unit and a target distance calculating unit which are connected in sequence.
According to the preferred embodiment of the present invention, the microwave signal transmitting unit specifically includes a phase-locked loop, a power amplifier, and a gain buffer follower, and the transmitting unit is configured to generate a linear continuous radar wave modulation signal, which is amplified by the gain buffer follower and the power amplifier in sequence, and then transmitted by the transceiver antenna array; and the input end of the power amplifier is connected with the output end of the gain buffer follower and used for amplifying the power of the generated linear continuous radar wave modulation signal and transmitting the linear continuous radar wave modulation signal through a transmitting antenna.
The feedback signal receiving unit is configured to receive a returned microwave signal, where the returned microwave signal is subjected to interference suppression by the self-interference suppression unit and then input to the feedback signal receiving unit.
The return signal extraction unit is used for extracting effective target signals, because the return signals contain a large amount of clutter noise frequencies, screening is needed, and the return signal extraction unit identifies the target return signals through Doppler spectral line scanning.
The speed calculation unit calculates the real-time speed of the front target according to the following formula:
the target distance calculating unit calculates the distance of the front target according to the following formula, and judges the moving direction of the vehicle according to the positive and negative changes of the real-time distance:
where C is the speed of light, f0 is the carrier center frequency of the transmitted signal, and B is the bandwidth of the transmitted modulated triangular wave signal. T is the period of the transmitted modulation triangular wave signal, f + is the frequency spectrum peak value frequency of the sweep frequency section on the modulation triangular wave with the period of T, and f-is the frequency spectrum peak value frequency of the sweep frequency section under the modulation triangular wave with the period of T.
The microwave monitoring unit responds the obtained information of the moving direction, the speed and the distance of the vehicle to the front end convergence unit through the second wireless communication unit.
According to an embodiment of the present invention, as shown in fig. 9, the field communication unit includes: a light emitting unit for emitting LED visible light having illumination and communication functions; a light receiving unit for receiving a visible light signal emitted from a vehicle; and the network signal conversion unit is used for converting the received visible light signal into a frame data format which can be used for data exchange of the existing network.
According to an embodiment of the present invention, the light emitting unit includes a channel encoder, a digital modulator, and an LED street lamp; the light receiving unit comprises a photosensitive element, a conditioning circuit, a digital demodulator and a channel decoder; the network signal conversion unit comprises a photoelectric conversion medium unit which is used for converting unipolar non-return-to-zero codes from an LED receiving end into bipolar codes, has a level and polarity conversion function and inputs working clock signals from the outside.
According to the embodiment of the invention, as shown in fig. 10, the regulated power supply unit includes a regression control circuit, an output ac-dc conversion circuit and a power supply response control unit, the regression control circuit is connected with the output ac-dc conversion circuit, and the output ac-dc conversion circuit is connected with the power supply response control unit.
According to a preferred embodiment of the present invention, the power supply response control unit includes a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a first NMOS transistor and a second NMOS transistor, the first capacitor is an electrolytic capacitor, one end of the first resistor is connected to the output terminal of the output ac-dc converting circuit, the other end of the first resistor is connected to the drain of the second NMOS transistor, the gate of the second NMOS transistor, one end of the second resistor and one end of the first capacitor are connected, the other end of the first capacitor is connected to one end of the third resistor, the connection ends of the first resistor and the third resistor are used for receiving an external control signal, the other end of the third resistor, one end of the second capacitor and the gate of the first NMOS transistor are connected, the source of the first NMOS transistor, the source of the second NMOS transistor, the other end of the second resistor and the other end of the second capacitor are all grounded, the LED street lamp is arranged between the drain electrode of the first NMOS tube and one end of the first resistor, when the power supply response control unit receives a control signal for lighting the LED street lamp, the control signal is at a high level of jump-up, the output AC-DC conversion circuit discharges, the return control circuit enters an overload protection state, the first capacitor is switched on, the second capacitor charges, the second NMOS tube is switched on, the first NMOS tube is switched off, the circuit is disconnected between the LED street lamp and the LED street lamp constant-current voltage-stabilizing power supply unit, the LED street lamp is not lighted, the first resistor consumes the charge of the output AC-DC conversion circuit as a load, when the output AC-DC conversion circuit finishes discharging, the first capacitor enters a DC blocking state, the second NMOS tube is switched off, the second capacitor finishes charging, the first NMOS tube is switched on, and a passage is formed between the LED street lamp and the LED street lamp voltage-stabilizing power supply unit, the LED street lamp is lit.
According to a preferred embodiment of the present invention, the return control circuit includes a constant current control unit, a power supply circuit unit, an absorption circuit unit, a switch and overcurrent detection circuit unit, an overvoltage detection circuit unit, and a transformer;
the power supply circuit unit comprises a fourth resistor, a fifth resistor, a sixth resistor, a first diode and a third capacitor; the absorption circuit unit comprises a seventh resistor, an eighth resistor, a ninth resistor, a second diode and a fourth capacitor; the switch and overcurrent detection circuit unit comprises a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifth capacitor, a sixth capacitor, a third NMOS (N-channel metal oxide semiconductor) tube and a third diode; the overvoltage detection circuit unit comprises a fifteenth resistor, a sixteenth resistor and a seventh capacitor; the transformer consists of two primary windings and a secondary winding, wherein the two primary windings are respectively a first primary winding and a second primary winding;
one end of the fourth resistor, one end of the seventh resistor, one end of the eighth resistor, one end of the fourth capacitor and one end of the first primary winding are connected to be connected to an external power supply; the other end of the fourth resistor is connected with one end of the fifth resistor, the other end of the fifth resistor, one end of the third capacitor, the cathode of the first diode are connected with the 1 st pin of the constant current control unit, the other end of the third capacitor is grounded, the anode of the first diode is connected with one end of the sixth resistor, the other end of the sixth resistor, one end of the fifteenth resistor and one end of the second primary winding are connected, the other end of the seventh resistor, the other end of the eighth resistor, the other end of the fourth capacitor are connected with one end of the ninth resistor, the other end of the ninth resistor is connected with the cathode of the second diode, the anode of the second diode, one end of the sixth capacitor, the drain of the third NMOS tube and the other end of the first primary winding are connected, the other end of the sixth capacitor, the source of the third NMOS transistor, one end of the tenth resistor, one end of the twelfth resistor, one end of the thirteenth resistor, and one end of the thirteenth resistor are connected to one end of the fourteenth resistor, the other end of the tenth resistor, one end of the fifth capacitor, and the 4 th pin of the constant current control unit are connected to ground, the 2 nd pin of the constant current control unit, the other end of the fifth capacitor, the other end of the twelfth resistor, the other end of the thirteenth resistor, and the other end of the fourteenth resistor are all connected to ground, the gate of the third NMOS transistor, one end of the eleventh resistor, and the anode of the third diode are connected to the gate of the third NMOS transistor, the cathode of the third diode is connected to the 3 rd pin of the constant current control unit, the other end of the fifteenth resistor, one end of the sixteenth resistor, and the anode of the constant current control unit are connected to the gate of the third, One end of the seventh capacitor is connected with the 5 th pin of the constant current control unit, and the other ends of the sixteenth resistor, the seventh capacitor and the second primary coil are grounded.
According to a preferred embodiment of the present invention, the output ac-dc converting circuit includes a seventeenth resistor, an eighteenth resistor, a fourth diode, a twelfth capacitor, an eighth capacitor and a ninth capacitor, wherein one end of the seventeenth resistor, an anode of the fourth diode and one end of the secondary coil are connected, the other end of the seventeenth resistor and one end of the twelfth capacitor are connected, the other end of the twelfth capacitor, one end of the eighteenth resistor, a cathode of the fourth diode, one end of the eighth capacitor and one end of the ninth capacitor are connected, a connection end of the twelfth capacitor and one end of the eighteenth resistor is an output end of the output ac-dc converting circuit, the other end of the eighteenth capacitor and the other end of the ninth capacitor and the other end of the secondary coil are connected, a connection end of the eighteenth resistor and the eighth capacitor is a ground end of, and the grounding end of the output AC-DC conversion circuit is grounded.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An integrated LED street light management system, the system comprising: the system comprises a main control center, a wireless access point, a first wireless communication unit, a front end aggregation unit, a plurality of field sub-control units and a voltage-stabilizing power supply unit, wherein the main control center is in wireless communication connection with the first wireless communication unit through the wireless access point; wherein,
the main control center is used for carrying out data analysis according to the monitoring data transmitted by the field sub-control unit and sending a control instruction to the field sub-control unit according to a data analysis result;
the wireless access point is used for providing remote connection between the main control unit and the first wireless communication unit;
the first wireless communication unit is used for providing wireless connection from the front-end convergence unit to the wireless access point;
the front end convergence unit is used for receiving convergence and scheduling data transmission and wireless connection between the field sub-control unit and the first wireless communication unit;
the field sub-control unit is used for providing field management, driving and monitoring on the LED street lamp; and
and the voltage-stabilizing power supply unit is used for supplying power to the front-end convergence unit and the field sub-control unit and controlling the output current.
2. The system as claimed in claim 1, wherein each field sub-control unit comprises a field processing unit, a second wireless communication unit, an intelligent driving unit, a driving protection unit, an LED street lamp, a monitoring unit and a field communication unit, the field processing unit is respectively connected with the second wireless communication unit, the intelligent driving unit and the field communication unit, the second wireless communication unit is connected with a front end convergence unit, the driving protection unit is connected with the intelligent driving unit, the output end of the intelligent driving unit is electrically connected with the LED street lamp, the LED street lamp is connected with the input end of the monitoring unit, and the output end of the monitoring unit is electrically connected with the input end of the second wireless communication unit; wherein,
the field processing unit is used for providing control and signal conversion for each part of the field sub-control unit;
the second wireless communication unit is used for providing wireless connection between the field sub-control unit and the front end convergence unit;
the intelligent driving unit is used for providing constant current driving and temperature control protection for the LED street lamp;
the drive protection unit provides safety protection for the intelligent drive unit;
the monitoring unit is used for acquiring the state parameter information and the real-time road condition information of the LED street lamp in real time; and
the field communication unit is used for carrying out real-time field communication with a road running vehicle.
3. The system of claim 2, wherein the main control center comprises a data storage unit, a data analysis unit, an intelligent instruction generation unit, and an instruction distribution unit,
the data storage unit is used for storing monitoring data received from the field sub-control unit and a preset instruction mapping table, and the instruction mapping table is used for recording optimal operation instructions corresponding to different monitoring data analysis results;
the data analysis unit is used for analyzing the received monitoring data;
the intelligent instruction generating unit is used for generating an operating instruction for the field sub-control unit according to an analysis result of the monitoring data and a storage instruction of the instruction mapping table;
the instruction distribution unit is used for issuing the operation instruction to the field sub-control unit.
4. A system as claimed in claim 3, wherein the data analysis unit comprises an LED street lamp operation state detection analysis subunit, an LED street lamp lumen attenuation detection analysis subunit, a road traffic condition detection analysis subunit, and a constant illumination dimming analysis subunit; wherein,
the LED street lamp running state detection and analysis subunit is used for comparing the current and voltage signals of the LED street lamp obtained in real time by the monitoring unit with a set current and voltage standard value to generate a detection and analysis result about the running state;
the detection and analysis of the lumen attenuation of the LED street lamp are realized by comparing the lumen intensity value of the LED street lamp transmitted by the monitoring unit with the set lumen intensity value, analyzing to obtain whether the lumen attenuation of the LED street lamp exceeds the set threshold value, and generating a detection and analysis result about the lumen attenuation;
the road traffic condition detection and analysis is to count vehicles at the positions of the LED street lamps in the past through the data transmitted by the monitoring unit, analyze the basic conditions of the road traffic of the whole area provided with the LED street lamps, and generate a detection and analysis result about the road traffic condition.
The constant illumination dimming analysis subunit compares the real-time ambient illumination intensity data transmitted by the monitoring unit with the set ambient illumination intensity to generate a detection analysis result about the ambient related illumination.
5. A system as claimed in claim 4, the intelligent drive unit of the field sub-control unit comprising: the device comprises a driving circuit, a voltage drop conversion unit, a timing balance unit, a timing control unit, an average current acquisition unit, a PWM (pulse-width modulation) signal generation unit, a temperature response triode and a temperature regulation signal generation circuit; the timing balance unit is respectively connected with the drive circuit, the timing control unit and the average current acquisition unit; the voltage drop conversion unit is respectively connected with the drive circuit and the average current acquisition unit; and the drain electrode of the temperature response triode is connected with the cathode of the LED, the source electrode of the temperature response triode is connected with the PWM signal generating unit, and the grid electrode of the temperature response triode is connected with the temperature adjusting signal generating circuit.
6. A system as claimed in claim 5, said drive protection unit comprising an interpolated comparison circuit and an interpolated signal generation circuit; the output end of the interpolation comparison circuit is connected with the driving circuit of the intelligent driving unit, and the negative input end of the interpolation comparison circuit is grounded; the first input end of the interpolation signal generating circuit is connected with the voltage drop conversion unit of the intelligent driving unit, the second input end of the interpolation signal generating circuit is connected with the first external reference voltage, and the output end of the interpolation signal generating circuit is connected with the first input end of the interpolation comparison circuit; the second input end of the interpolation comparison circuit is connected with the second external reference voltage, and the negative input end of the interpolation comparison circuit is grounded.
7. The system of claim 6, wherein the monitoring unit comprises a current and voltage monitoring unit, a brightness monitoring unit, a microwave monitoring unit and an ambient temperature monitoring unit;
the current and voltage monitoring unit is used for acquiring current and voltage parameters of the LED street lamp in real time and comprises a current sampling unit, a smoothing unit and a buffer unit which are connected in sequence; the current sampling unit is used for sampling the current in the LED street lamp, the smoothing unit is used for smoothing the sampled current signal, and the buffer unit is used for buffering the smoothed signal and inputting the buffered signal to the field processing unit;
the real-time brightness monitoring unit is used for detecting the actual illuminance of the LED street lamp and crossly comparing the actual illuminance with a set value to obtain the lumen attenuation degree of the LED street lamp, detecting the illuminance of the external environment and inputting the detection result into the field processing unit;
the environment temperature monitoring unit is used for acquiring the environment temperature of the position where the LED street lamp is located in real time and inputting a detection result to the field processing unit;
and the microwave monitoring unit is used for detecting the moving direction, speed and distance information of the vehicle under the corresponding LED street lamp and inputting the detection result into the field processing unit.
8. A system according to claim 7, the field communication unit comprising: a light emitting unit for emitting LED visible light having illumination and communication functions; a light receiving unit for receiving a visible light signal emitted from a vehicle; and the network signal conversion unit is used for converting the received visible light signal into a frame data format which can be used for data exchange of the existing network.
9. The system according to claim 8, wherein the regulated power supply unit comprises a regression control circuit, an output ac-dc conversion circuit and a power response control unit, the regression control circuit is connected with the output ac-dc conversion circuit, and the output ac-dc conversion circuit is connected with the power response control unit.
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| CN108521702A (en) * | 2018-04-14 | 2018-09-11 | 芜湖泰庆电子科技有限公司 | A kind of control method of the intelligent road-lamp control circuit based on STM chips |
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Application publication date: 20151230 |