CN217116469U

CN217116469U - Dual-mode communication street lamp inclination detection protection circuit based on acceleration sensor

Info

Publication number: CN217116469U
Application number: CN202220936665.3U
Authority: CN
Inventors: 郑道昌
Original assignee: Sichuan Lishida Lighting Equipment Co ltd
Current assignee: Sichuan Lishida Lighting Equipment Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-08-02
Anticipated expiration: 2032-04-22

Abstract

The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor is used for controlling a street lamp driving power supply and comprises an MCU main control unit, a power line carrier and wireless radio frequency communication unit, an acceleration sensor unit and a relay driving unit, wherein the power line carrier and wireless radio frequency communication unit is connected with the MCU main control unit and is connected with a mains supply through a coupling circuit unit, and a relay of the relay driving unit is connected to a street lamp driving power line and is used for controlling the on-off of the street lamp power supply. The real-time monitoring of the inclination angle of the lamp post is realized, and the functions of remote real-time alarming and protection of the inclination angle of the street lamp post are realized by adopting power line carrier and RF wireless radio frequency for communication; the power supply system can directly detect the inclination angle and automatically judge whether the power supply of the street lamp needs to be turned off or not according to the inclination angle.

Description

Dual-mode communication street lamp inclination detection protection circuit based on acceleration sensor

Technical Field

The utility model relates to a power electronic technology field especially relates to a bimodulus communication street lamp slope detects protection circuit based on acceleration sensor.

Background

With the rapid development of urban construction, the installation quantity of the street lamps is increased in multiples, and great pressure is applied to the operation and maintenance of the street lamps while convenience is brought to people; in the use of the existing street lamp, the number of safety accidents caused by the inclination of the lamp post due to the reasons of artificial damage, aging, natural disasters and the like is increasing. At present, the problem of lamp pole inclination is solved by a mode of regular manual inspection or witness telephone alarm, the mode has high management cost and poor timeliness and seriously influences normal life, and meanwhile, a street lamp management department cannot know and process the lamp pole inclination at the first time. Therefore, there is a need to develop a better street lamp inclination detection protection circuit to meet the development requirements of intelligent street lamps.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a dual-mode communication street lamp inclination detection protection circuit based on an acceleration sensor, which realizes real-time monitoring of the inclination angle of a lamp post and realizes the functions of real-time alarming and protection of the inclination angle of the remote street lamp post by adopting power line carrier and RF wireless radio frequency to communicate; the power supply system can directly detect the inclination angle and automatically judge whether the power supply of the street lamp needs to be turned off or not according to the inclination angle.

In order to realize the purpose of the utility model, the following scheme is planned to be adopted:

the dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor is used for controlling a street lamp driving power supply and comprises an MCU main control unit, a power line carrier and wireless radio frequency communication unit, an acceleration sensor unit and a relay driving unit, wherein the power line carrier and wireless radio frequency communication unit is connected with the MCU main control unit and is connected with a mains supply through a coupling circuit unit, and a relay of the relay driving unit is connected to a street lamp driving power line and is used for controlling the on-off of the street lamp power supply.

The acceleration sensor unit is used for monitoring the inclination angle value of the street lamp pole in real time and converting the angle value into a digital signal and sending the digital signal to the MCU unit through the I2C bus interface for data analysis.

The MCU main control unit is used for comparing the inclination angle value with a preset value and sending a control signal to the relay driving unit according to a comparison result; and the wireless radio frequency communication unit is used for transmitting the inclination angle value and the relay control state to the power line carrier and the wireless radio frequency communication unit.

The relay driving unit is used for controlling the relay to be closed or opened after the control signal is subjected to current amplification.

The coupling circuit unit is used as a power line carrier signal output and input channel of the power line carrier and the wireless radio frequency communication unit and plays a role in power frequency isolation.

The power line carrier and wireless radio frequency communication unit is used for modulating the inclination angle value and the relay control state signal into a power line carrier signal and a wireless radio frequency carrier signal, sending the power line carrier signal to the coupling circuit unit and then directly entering a power line, and transmitting the wireless radio frequency carrier signal to the air so as to be reported to an upper computer; and the MCU main control unit is used for sending out a control signal according to the instruction of the upper computer.

The beneficial effects of the utility model reside in that: the 3D acceleration sensor is adopted to detect the inclination angle of the lamp pole in real time, the MCU main control unit receives the preset values of the inclination angle values to compare the preset values, the closed state of the relay is controlled according to the comparison result, communication is carried out through a power line carrier and wireless radio frequency communication dual-mode technology, and the lamp pole can be immediately powered off and can give an alarm to an upper position when the lamp pole inclines. The high-frequency signal carrying information is loaded on the power line and the wireless radio frequency signal, data are transmitted to the terminal equipment in a wired and wireless mode, data communication is carried out by using the high-frequency signal carrying information, various information is transmitted, dual-mode communication is realized, a special communication line does not need to be laid, labor and money are saved, maintenance is easy, interference is avoided, and therefore the street lamp pole is accurately inclined at the real-time inclination angle of power failure and uploading, and operation and maintenance of the street lamp are more intelligent.

Drawings

Fig. 1 is a block diagram of an overall circuit structure according to an embodiment of the present application.

Fig. 2 is a circuit diagram of an MCU control unit according to an embodiment of the present application.

Fig. 3 is a circuit diagram of an acceleration sensor unit according to an embodiment of the present application.

Fig. 4 is a circuit diagram of a coupling circuit unit according to an embodiment of the present application.

Fig. 5 is a circuit diagram of a plc and a wireless rf communication unit according to an embodiment of the present disclosure.

Fig. 6 is a circuit diagram of a relay driving unit according to an embodiment of the present application.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, however, the described embodiments of the present invention are some, not all embodiments of the present invention.

The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor is used for controlling a street lamp driving power supply, and the structure of the dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor is shown in fig. 1, and comprises: the system comprises an MCU main control unit, a power line carrier and wireless radio frequency communication unit, a coupling circuit unit, an acceleration sensor unit and a relay driving unit. The MCU main control unit is respectively connected with the acceleration sensor unit, the power line carrier and wireless radio frequency communication unit and the relay driving unit, wherein one side of the coupling circuit unit is connected with the power line carrier and wireless radio frequency communication unit, and the other side of the coupling circuit unit is connected with commercial power.

The MCU main control unit uses an internal timer to perform sampling analysis and judgment on data transmitted back by each external unit circuit when the street lamp is powered on. The acceleration sensor unit monitors the inclination angle of the street lamp pole in real time and converts the angle value into a digital signal and sends the digital signal to the MCU main control unit through the I2C bus interface for angle data analysis. The MCU main control unit compares the inclination angle value with a preset value and sends a control signal to the relay driving unit according to the comparison result; and transmits the inclination angle value and the relay control state signal to the power line carrier and the wireless radio frequency communication unit. And the relay driving unit controls the relay to be closed or opened according to the control signal.

The coupling circuit unit is used as a power line carrier and a power line carrier signal output and input channel of the wireless radio frequency communication unit and plays a role in power frequency isolation. The power line carrier and wireless radio frequency communication unit is used for receiving and transmitting power line carrier signals and wireless radio frequency signals and demodulating the signals, wherein the PLC carrier part is responsible for receiving the power line signals and demodulating the signals, modulating a transmission inclination angle value and a relay control state signal transmitted by the MCU main control unit onto the power line carrier signals according to standard modulation signals of a power line carrier communication physical layer, transmitting the modulated power line carrier signals to the coupling circuit unit, then directly entering a power line, and reporting to an upper computer; meanwhile, the RF wireless radio frequency part modulates the transmission inclination angle value subjected to digital coding and a relay control state signal on a radio frequency carrier, transmits the signal to the air through an antenna and reports the signal to an upper computer; and all the instructions sent by the upper computer are received and demodulated and then sent to the MCU through the serial port for data processing.

The method comprises the following steps that an MCU main control unit carries out angle real-time reading on X \ Y \ Z axis data sampled by an acceleration sensor unit end through I2C bus interface communication, when the change of the inclination angle of a light pole is monitored, the real-time inclination value is compared with an electrified initial angle value, meanwhile, the MCU main control unit compares the compared result with a preset alarm action threshold value again, and sends a control signal to a relay driving unit according to the compared result; the relay driving unit amplifies the current of the control signal and then controls the relay to act so as to complete the disconnection of the relay when the inclination angle exceeds a threshold value; meanwhile, related data and the control state of the relay are transmitted through the serial port, the power line carrier and the wireless radio frequency communication unit upload the data to the upper computer in real time through the power line carrier and the wireless radio frequency communication carrier, the MCU main control unit can also obtain a control command issued by the upper computer from the power line carrier and the wireless radio frequency communication unit, and the relay driving circuit is actively controlled and the alarm threshold value is modified, so that remote monitoring is realized.

In this example, the MCU control unit adopts the scheme shown in fig. 2, and includes an MCU chip U1, the MCU chip U1 may adopt an STM32 type chip, bus ports PB14 and PB13 of the MCU chip U1 are connected to the acceleration sensor unit, and the MCU chip U1 is connected to the power line carrier and the wireless radio frequency communication unit through ports PB6 and PB7 to realize communication with the upper computer; the drive port PD1 is connected to the relay drive unit.

In this example, the acceleration sensor unit adopts a circuit as shown in fig. 3, and specifically includes a resistor R7, a resistor R8, a resistor R12, a 3D acceleration sensor U3, a capacitor C9, a capacitor C10, and a capacitor C11.

One end of the resistor R7 is connected with a pin 1 of the 3D acceleration detection chip U3 and then connected with a port PB13 of the MCU chip U1, and the other end of the resistor R7 is connected with one end of the resistor R8 and then connected with a pin 2 and a pin 3 of the 3D acceleration detection chip U3 and a power supply + 3.3V; the other end of the resistor R8 is connected with a pin 4 of the 3D acceleration detection chip U3 and then connected with a port PB14 of the MCU chip U1; the 5 feet, the 6 feet, the 7 feet and the 8 feet of the 3D acceleration sensor U3 are connected with a power ground; the

pins

9 and 10 of the 3D acceleration sensor U3 are connected and then connected with one end of a capacitor C9, a capacitor C10 and a capacitor C11, and then connected with a power supply + 3.3V; the other ends of the capacitor C9, the capacitor C10 and the capacitor C11 are connected with the power ground

The resistor R7 and the resistor R8 are pull-up resistors of a bus port of the U3 of the 3D acceleration detection chip, and the capacitor C C9, the capacitor C10 and the capacitor C11 are filter capacitors for supplying power to the chip.

In this example, the coupling circuit unit adopts a circuit as shown in fig. 4, and includes an isolation coupling transformer T1 and a capacitor C17, which mainly serve as an output and input path of a carrier signal and serve to isolate the 220V/50Hz power frequency. The power line carrier and wireless radio frequency communication unit adopts a circuit shown in fig. 5, and comprises a PLC + RF dual-mode chip PLC & RF, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C19 and an antenna ANT.

One end of the capacitor C17 is connected with the L-phase input end of the street lamp driving power supply, the other end of the capacitor C17 is connected with the 4 pin of the coupling transformer T1, and the 1 pin of the coupling transformer T1 is connected with the N-phase input end of the street lamp driving power supply;

pins

6 and 6 of the coupling transformer T1 are connected together and then connected with the negative electrode ground of the power supply, pin 5 of the coupling transformer T1 is connected with pin 13 PLC-IN of the PLC + RF dual-mode chip PLC & RF, and pin 8 of the coupling transformer T1 is connected with pin 15 PLC-OUT of the PLC + RF dual-mode chip PLC & RF.

One ends of a capacitor C13 and a capacitor C14 are connected in parallel and then are connected with a pin 1 of a PLC and RF dual-mode chip PLC & RF, and then are connected with the positive electrode of a direct-current power supply DC 12V; one end of a capacitor C15, one end of a capacitor C16 and one end of a capacitor C19 are connected in parallel, then connected with a pin 2 of the PLC and RF dual-mode chip and then connected with a positive electrode of a direct-current power supply + 3.3V; the other ends of the capacitor C13, the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C19 are connected in parallel and then connected with a power ground;

pins

5 and 14 of the PLC and RF dual-mode chip are connected with the cathode of a power supply; and a pin 3 and a pin 4 of the PLC + RF dual-mode chip PLC & RF are communication serial ports which are respectively connected with a port PB6 and a port PB7 of the MCU chip U1. And an antenna ANT is connected to the 8-pin of the PLC + RF dual-mode chip PLC & RF.

Specifically, as shown in fig. 5, the power line carrier and the wireless rf communication unit function as:

receiving a power line signal from a coupling transformer T1, demodulating the signal, modulating an inclination angle value and a relay control state signal onto the power line carrier signal according to a standard modulation signal of a power carrier communication physical layer, and transmitting the modulated power line carrier signal to a coupling transformer T1 and then directly entering a power line so as to upload the power line signal to an upper computer; similarly, the command sent by the upper computer can be received in the reverse direction and transmitted to the MCU chip U1.

Meanwhile, the wireless radio frequency part receives and demodulates wireless signals through an antenna ANT, modulates the tilt angle value and the relay control state signal onto a wireless carrier according to a standard modulation signal of a communication physical layer of the Internet of things, and transmits the modulated wireless signals into the air through the antenna ANT so as to upload the signals to an upper computer; similarly, the command sent by the upper computer can be received in the reverse direction and transmitted to the MCU chip U1.

In this example, the relay driving unit adopts a circuit as shown in fig. 6, and the specific circuit includes a resistor R20, a resistor R21, a diode D5, a relay K1, and an NPN-type transistor Q1.

One end of a resistor R20 is connected with a driving port PD1 of the MCU chip U1, the other end of the resistor R20 is connected with one end of a resistor R21 and the base electrode of a triode Q1, the other end of the resistor R21 is connected with the emitter electrode of the triode Q1 and then is commonly connected with the negative pole ground of a power supply, and the cathode of a diode D5 and the coil 4 pin of the relay K1 are connected with the power supply VCC 1; the anode of the diode D5 is connected with the collector of the triode Q1 and the 5 feet of the coil of the relay K1; the 2 feet and the 7 feet of the relay K1 are connected with the AC-L of the external single-phase alternating current, and the 3 feet and the 6 feet of the relay K1 are connected with the L-phase input end of the street lamp driving power supply.

When the driving port PD1 of the MCU chip U1 transmits a high-level control signal from Relay to the resistor R20 as shown in fig. 6, the base of the transistor Q1 is driven to turn on the transistor, and current-amplifies the control signal to drive the Relay K1 to close. When a driving port PD1 of the MCU chip U1 transmits a low-level control signal to the resistor R20 from a Relay, the base electrode of the triode Q1 is at a low level, the triode Q1 is cut off, and the Relay K1 is disconnected in a power-off mode, wherein the resistor R20 and the resistor R21 are current-limiting and pull-down resistors of the base electrode of the triode Q1, and the base electrode of the triode Q1 is protected from being damaged by a large current and conducting by external interference. The diode D5 is a freewheeling diode for eliminating the effect of the back electromotive force generated at the moment of opening the relay on the circuit.

Specifically, the MCU chip U1 sends a high-level control signal through the driving port PD1 when judging that the real-time tilt angle value of the light pole is within the range; the MCU chip U1 sends out low level control signal through drive port PD1 when judging that the real-time light pole's inclination angle value exceeds the preset scope.

The foregoing is only a preferred embodiment of the invention and is not intended to be the only or limiting embodiment of the invention. It should be understood by those skilled in the art that various changes and equivalent substitutions made herein may be made without departing from the scope of the invention as defined by the appended claims.

Claims

1. The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor is characterized by comprising an MCU main control unit, a power line carrier and wireless radio frequency communication unit, an acceleration sensor unit and a relay driving unit, wherein the power line carrier and wireless radio frequency communication unit is connected with the MCU main control unit and is connected with a mains supply through a coupling circuit unit;

the acceleration sensor unit is used for monitoring the inclination angle value of the street lamp pole and transmitting the inclination angle value to the MCU main control unit;

the MCU main control unit is used for comparing the inclination angle value with a preset value and sending a control signal to the relay driving unit according to a comparison result; and is used for transmitting the inclination angle value and the relay control state to the power line carrier and the wireless radio frequency communication unit;

the relay driving unit is used for controlling the relay to be switched on or switched off according to the control signal;

the coupling circuit unit is used as a power line carrier signal output and input channel of the power line carrier and the wireless radio frequency communication unit and plays a role in power frequency isolation;

2. The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor as claimed in claim 1, wherein the MCU main control unit comprises an MCU chip U1, the I2C bus ports PB13 and PB14 of the MCU main control unit are connected with the acceleration sensor unit, and the serial ports PB6 and PB7 are connected with the power line carrier and the serial port of the wireless radio frequency communication unit to realize communication with an upper computer; the drive port PD1 is connected to the relay drive unit.

3. The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor as claimed in claim 1, wherein the acceleration sensor unit comprises a resistor R7, a resistor R8, a 3D acceleration sensor U3, a capacitor C9, a capacitor C10, and a capacitor C11; one end of the resistor R7 is connected with the pin 1 of the 3D acceleration detection chip U3 and then connected with the MCU main control unit, and the other end of the resistor R8 is connected with the pin 2 and pin 3 of the 3D acceleration detection chip U3 and the power supply + 3.3V; the other end of the resistor R8 is connected with a pin 4 of a 3D acceleration detection chip U3 and then connected with the MCU main control unit; the 5 feet, the 6 feet, the 7 feet and the 8 feet of the 3D acceleration sensor U3 are connected with a power ground; the pins 9 and 10 of the 3D acceleration sensor U3 are connected and then connected with one end of a capacitor C9, a capacitor C10 and a capacitor C11, and then connected with a power supply + 3.3V; the other ends of the capacitor C9, the capacitor C10 and the capacitor C11 are connected to the power ground.

4. The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor as claimed in claim 1, wherein the coupling circuit unit comprises an isolation coupling transformer T1 and a capacitor C17, one end of the capacitor C17 is connected with the L-phase input end of the street lamp driving power supply, the other end of the capacitor C17 is connected with the 4-pin of the coupling transformer T1, and the 1-pin of the coupling transformer T1 is connected with the N-phase input end of the street lamp driving power supply; pins 6 and 6 of the coupling transformer T1 are connected together and then connected with the negative ground of the power supply, and pins 5 and 8 of the coupling transformer T1 are connected with the P power line carrier and wireless radio frequency communication unit.

5. The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor as claimed in claim 1, wherein the power line carrier and wireless radio frequency communication unit comprises a PLC + RF dual-mode chip PLC & RF, a capacitor C13, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C19, and an antenna ANT; one ends of a capacitor C13 and a capacitor C14 are connected in parallel and then are connected with a pin 1 of a PLC and RF dual-mode chip PLC & RF, and then are connected with the positive electrode of a direct-current power supply DC 12V; one end of a capacitor C15, one end of a capacitor C16 and one end of a capacitor C19 are connected in parallel, then connected with a pin 2 of the PLC and RF dual-mode chip and then connected with a positive electrode of a direct-current power supply + 3.3V; the other ends of the capacitor C13, the capacitor C14, the capacitor C15, the capacitor C16 and the capacitor C19 are connected in parallel and then connected with a power ground; pins 5 and 14 of the PLC and RF dual-mode chip are connected with the cathode of a power supply; the 3 feet and the 4 feet of the PLC + RF dual-mode chip PLC & RF are communication serial ports and are connected with the MCU main control unit, the 13 feet and the 15 feet of the PLC + RF dual-mode chip PLC & RF are connected with the coupling circuit unit, and the 8 feet of the PLC + RF dual-mode chip PLC & RF are connected with the antenna ANT.

6. The dual-mode communication street lamp inclination detection protection circuit based on the acceleration sensor as claimed in claim 1, wherein the relay driving unit comprises a resistor R20, a resistor R21, a diode D5, a relay K1, and an NPN type triode Q1, wherein one end of the resistor R20 is connected to the MCU main control unit, the other end is connected to one end of the resistor R21 and the base of the triode Q1, the other end of the resistor R21 is connected to the emitter of the triode Q1 and then commonly connected to the negative pole of the power supply, and the cathode of the diode D5 is connected to the coil 4 pin of the relay K1 and the power supply VCC 1; the anode of the diode D5 is connected with the collector of the triode Q1 and the 5 feet of the coil of the relay K1; the 2 feet and the 7 feet of the relay K1 are connected with the AC-L of the external single-phase alternating current, and the 3 feet and the 6 feet of the relay K1 are connected with the L-phase input end of the street lamp driving power supply.