CN210954286U

CN210954286U - Wireless lighting monitoring and electric measuring device

Info

Publication number: CN210954286U
Application number: CN201921881689.8U
Authority: CN
Inventors: 骆欢; 朱松; 庞涛
Original assignee: CHENGDU SYSWARE ELECTRONIC INFORMATION CO LTD
Current assignee: CHENGDU SYSWARE ELECTRONIC INFORMATION CO LTD
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-07-07
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses a wireless lighting monitoring and electricity measuring device, including MCU, power module, communication unit, electricity measuring unit and the control unit, wherein: the electric measurement unit is used for detecting electric energy information of each phase of the three-phase power and sending the electric energy information to the MCU; the communication unit is used for receiving the control information and sending the control information to the MCU; receiving and transmitting the electric energy information transmitted by the MCU; the control unit is provided with three control interface circuits, receives a control signal sent by the MCU and controls the on-off of each phase loop of the three-phase power; the power module provides power for the device. The utility model is suitable for an automatic intelligent control of railway station yard illumination can carry out centralized monitoring to application scenes such as railway station yard lighthouse, lamp bridge illumination. The functions of remote control, remote communication, timing control, fault alarm, electric energy collection, temperature collection and the like are realized. Provides simple, reliable and various energy-saving and control means.

Description

Wireless lighting monitoring and electric measuring device

Technical Field

The utility model relates to an illumination control field especially relates to a wireless illumination control and electricity measuring device.

Background

In areas such as railway station houses, station yards or light bridges, a large number of lighting devices are often arranged for lighting, and due to the fact that the control mode is original, the situations of low management efficiency, resource waste and the like are caused. Meanwhile, areas such as railway station houses, station yards or light bridges are relatively wide, and distances between lighting devices are dispersed, so that great challenges are brought to scene construction and maintenance. In addition, the existing lighting related device can only simply control the lighting equipment, but cannot monitor the running state of the lighting equipment. The utility model discloses.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a wireless lighting control and electricity survey device, including MCU, communication unit, electricity survey unit and the control unit, wherein:

the electric measurement unit is used for detecting electric energy information of each phase of the three-phase power and sending the electric energy information to the MCU;

the communication unit is used for receiving the control information and sending the control information to the MCU; receiving and transmitting the electric energy information transmitted by the MCU;

the control unit is provided with three control interface circuits, receives the control signal sent by the MCU and controls the on-off of each phase loop of the three-phase power.

Preferably, the electric measuring unit comprises an electric energy collecting chip, a voltage collecting circuit and a current collecting circuit, wherein the collecting circuit collects voltage and current information of each phase of the three-phase power and sends the voltage and current information to the electric energy collecting chip to obtain the electric energy information of each phase of the three-phase power.

Preferably, the monitoring and electrical measuring device further comprises a temperature measuring unit, said temperature measuring unit comprising a temperature sensor for collecting temperature information.

Preferably, the monitoring and electric measuring device further comprises a power supply module, wherein the power supply module comprises an LS03-15B05SR2S power supply module, and the power supply module realizes conversion of alternating current and direct current and provides power for the device.

Preferably, the power module further comprises a 24V to 5V power unit, a 5V to 3.3V power unit and a button cell unit, and provides multiple power supplies for the device.

Preferably, the communication unit includes one or more of a LORA communication module, a DI input module, or a 485 communication module.

Preferably, the DI input module includes a DI input port, a transient suppression diode, a photocoupler and a parallel-to-serial register, and DI signals are input from the DI input port, sequentially pass through the transient suppression diode, the photocoupler and the parallel-to-serial register, and then are transmitted to the MCU.

Preferably, the control interface circuit comprises a magnetic latching relay, an opening control loop and a closing control loop, and the opening control loop and the closing control loop receive a control signal of the MCU to control the opening or closing of the magnetic latching relay.

Preferably, the opening control loop and the closing control loop both comprise PNP type triodes, the emitter of each triode is connected with 5V reference voltage, the collector is connected with the control end of the magnetic latching relay, the base is connected with the MCU control signal output end through a resistor, and the base and the emitter are also connected with a resistor.

Preferably, the monitoring and electrical measuring device further comprises a USB download configuration unit, using a CH340G chip, for downloading code or parameter configuration.

The beneficial effects of the utility model reside in that: the utility model discloses a corresponding application scene decision maker provides diversified lighting control mode and data monitoring means. The wireless illumination monitoring and electric measuring device uses a wireless communication mode, and can reduce the workload of construction and maintenance. Meanwhile, the lighting equipment needed in the scene is brought into a unified system platform for centralized management, and the on-off state of the lighting equipment can be remotely monitored and manually controlled. The lamp control can be automatically switched on and off according to different requirements, and the lighting requirements of various conditions are met. Meanwhile, the working state of the lighting equipment can be monitored in real time through feedback analysis of electric energy information such as voltage, current and the like of a power supply loop of the lighting equipment. All control and management work can be finished on intelligent terminals such as mobile phones, computers and panels, and scene illumination management efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of a wireless lighting monitoring and electrical measuring device;

FIG. 2 is a voltage acquisition circuit diagram;

FIG. 3 is a current acquisition circuit diagram;

FIG. 4 is a DI input module circuit diagram;

FIG. 5 is a 485 communication module circuit;

FIG. 6 is a control interface circuit diagram;

FIG. 7 is a circuit diagram of a LS03-15B05SR2S power supply module;

fig. 8 is a circuit diagram of a USB download configuration unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

As shown in fig. 1, a wireless lighting monitoring and electrical measuring device comprises an MCU, a communication unit, an electrical measuring unit and a control unit, wherein: the electric measurement unit is used for detecting electric energy information of each phase of the three-phase power and sending the electric energy information to the MCU; the communication unit is used for receiving the control information and sending the control information to the MCU; receiving and transmitting the electric energy information transmitted by the MCU; the control unit is provided with three control interface circuits, receives the control signal sent by the MCU and controls the on-off of each phase loop of the three-phase power.

The electric measurement unit comprises an electric energy acquisition chip, a voltage acquisition circuit and a current acquisition circuit, wherein the acquisition circuit acquires voltage and current information of each phase of the three-phase power and sends the voltage and current information to the electric energy acquisition chip to obtain the electric energy information of each phase of the three-phase power. The electric energy acquisition chip adopts an RN8302B chip to realize the electric measurement function. Fig. 2 and 3 show an embodiment of a voltage acquisition circuit and a current acquisition circuit.

As shown in fig. 2, the wireless lighting monitoring and electrical measuring device includes a voltage acquisition circuit. The DL-PT202D voltage transformer is selected to be mainly used for input isolation (isolation voltage 4 KV). On the basis of ensuring the measuring range and the precision, the voltage of the input end can be isolated, and possible influence on equipment due to external change is prevented. Because the rated current parameter that voltage transformer passed through is 2mA, needs external resistance current-limiting, simultaneously because of input voltage is great, the resistance volume is less then creepage clearance is very little, and the big voltage drop at resistance both ends leads to the air to puncture easily, so need carry out the partial pressure with a plurality of resistances, use 8 resistances of 120K when the design.

As shown in fig. 3, the wireless lighting monitoring and electrical measuring device includes a current collection circuit. The device adopts a DL-CT1005A Current Transformer (CT) to complete the current acquisition work. The coil transformation ratio selected by the current transformer is 2000:1, and the isolation voltage is 3 KV. On the basis of ensuring the measuring range and the precision, the current of the input end can be isolated, and possible influence on equipment due to external change is prevented.

The monitoring and electrical measuring device further comprises a temperature measuring unit, wherein the temperature measuring unit comprises a temperature sensor for acquiring temperature information. The DS18B20 is used as a temperature sensor, the measured temperature is directly read, and the digital transmission mode of a one-line bus is adopted, so that the anti-interference performance of the system is greatly improved.

The communication unit includes one or more of a LORA communication module, a DI input module, or a 485 communication module. Preferably, the signal input units can all adopt the 3 types, DI input can be carried out, LORA wireless communication is supported, and 485 bus communication is used for expanding the sub-devices and the sensor devices.

The LORA communication module adopts an E32-TTL-500 wireless transparent transmission module, and input signals are transmitted to the MCU through the wireless transparent transmission module. The E32-TTL-500 is a wireless serial port module (UART) based on an SX1278 radio frequency chip of SEMTECH company, is in a transparent transmission mode, and is compatible with 3.3V and 5V IO port voltage. By adopting the LoRa direct sequence spread spectrum technology, the method has the advantages of longer communication distance, concentrated power density and strong anti-interference capability. The module is provided with a software FEC forward error correction algorithm, the coding efficiency is high, the error correction capability is strong, under the condition of sudden interference , the interfered data packet can be actively corrected, and the reliability and the transmission distance are greatly improved. The module has data encryption and compression functions. The data transmitted by the module in the air has randomness, and the data interception loses significance through a strict encryption and decryption algorithm. The data compression function has the advantages of reducing the transmission time and the interfered probability and improving the reliability and the transmission efficiency.

The DI input module comprises a DI input port, a transient suppression diode, a photoelectric coupler and a parallel-serial register, and DI signals are input from the DI input port, sequentially pass through the transient suppression diode, the photoelectric coupler and the parallel-serial register and then are transmitted into the MCU. Fig. 4 shows an embodiment of the DI input circuit, in which JD _ STATE11, JD _ STATE22, and JD _ STATE33 are 3-way DI signal inputs, and the input signal is connected to a transient suppression diode to prevent high voltage pulse from being input, specifically, the transient suppression diode is a PSM712-LF _ T7 TVS tube; setting a DI signal threshold through a ZMM15V voltage stabilizing diode, specifically, adopting a ZMM15V voltage stabilizing diode as the voltage stabilizing diode; and then the input signal is transmitted into the parallel-serial chip through the optical coupling isolator, and specifically, the optical coupling isolator adopts PC847 optical coupling isolation.

The 485 communication module is specifically provided with 2-channel 485 bus extension, and can extend the sub-equipment and the sensor equipment according to the actual needs of projects. As shown in fig. 5, in an embodiment of the 485 input circuit, the 485 communication module is separately powered by a 5V isolation power supply by adopting an isolation measure, so as to prevent external interference from being introduced through the 485 interface. The 485 communication unit adopts an ADUM1201 high-speed isolation chip to achieve the communication speed of more than 115200. The SP485 chip receiving and sending mode is automatically realized by a hardware circuit. PSM712_ LF-T7 is a transient suppressor that prevents high voltage damage to the device. Meanwhile, a triode switching circuit is used as an enabling circuit of the SP485 chip.

The control unit is configured with three-way control interface circuits, which are the same, as shown in fig. 6, which is an embodiment of the interface control circuit. The control interface circuit comprises a magnetic latching relay, an opening control loop and a closing control loop, and the opening control loop and the closing control loop receive the control signal of the MCU to control the opening or closing of the magnetic latching relay. The starting control loop and the closing control loop both comprise PNP type triodes, the emitting electrode of each triode is connected with 5V reference voltage, the collecting electrode of each triode is connected with the control end of the magnetic latching relay, the base electrode of each triode is connected with the control signal output end of the MCU through a resistor, and the base electrode and the emitting electrode of each triode are also connected with a resistor. IN the figure, IN1A and IN1B are three-phase electric circuit interfaces, a voltage dependent resistor is arranged between two ports, and the protective relay contact does not generate high voltage at two ends of the contact when a load circuit is disconnected.

The monitoring and electric measuring device further comprises a power supply module, wherein the power supply module comprises an LS03-15B05SR2S power supply module, conversion of alternating current and direct current is achieved, and a 24V power supply is provided for the device. Referring to fig. 7, which is an embodiment of the power module LS03-15B05SR2S, F1 is a slow blow fuse to prevent excessive circuit current, and since there are a large number of capacitive devices in the power circuit and a large current flows through the power switch, the slow blow fuse is selected. RU _1 is a voltage dependent resistor, and can clamp voltage when the input voltage is too large, so that the device is prevented from being burnt out due to the excessive input voltage. R1-1, RU _ 2-3 are piezoresistor discharge tubes to form a lightning protection circuit, and are used for protection measures under the condition of high voltage. L2 is a common mode choke coil to remove common mode interference on the live and neutral wires. C8 is the X electric capacity of ann rule electric capacity, at power supply overline circuit, EMI filters and reduces the differential mode and disturbs. And C4 and C10 are Y capacitors and are connected between the power line and the ground line in a bridging mode to reduce common mode interference. L1 is a power inductor for filtering out high frequency interference. RT1 is a thermistor to prevent the circuit from overloading for a long time. C7 and C13 are LS05-15B024SS peripheral circuits. DI is two-way transient suppression pipe, prevents that the voltage is too big, protects the back stage circuit. P1 and P2 are DC selective jumper caps, and are short-circuited when the external power supply is DC. P11 is an AC selective jumper cap, and is short-circuited when the external power supply is AC power supply.

The power module can also comprise a 24V-to-5V power unit, a 5V-to-3.3V power unit and a button battery unit, and provides various power supplies for the device. For example, the 24V to 5V power supply unit adopts an LM2596S-5.0 switching power supply chip, takes 24V as power input, outputs a current of 5.0V voltage/1A or more, and the current can be used for isolating the LORA wireless module and the 485 communication module to supply power and simultaneously supply power to other functional modules. The 5V-to-3.3V power supply unit adopts an ASM117-3.3 power supply voltage stabilization chip, takes 5V as power supply input, outputs 3.3V voltage and is mainly used for supplying power for the MCU module and the electric measurement module and supplying power for other functional modules.

The monitoring and electrical testing device also includes a USB download configuration unit, using a CH340G chip, for downloading code or parameter configuration. As shown in fig. 8, in an embodiment of the USB download configuration unit, the combination of Q4 and Q5 in the figure constitutes a one-touch download circuit, and only simple settings are required: the low level of DTR is reset, RTS high level enters BootLoader to download codes by one key, and B0 does not need to be set manually and reset is not needed. Where RESET is the RESET signal and BOOT0 is the B0 signal for the start mode. The specific implementation process of the one-key downloading circuit comprises the following steps: firstly, mcusisp controls DTR to be low, and then DTR _ N outputs high; then RTS is set high, RTS _ N output is low, Q5 is turned on, BOOT0 is pulled high, that is, BOOT0 is set to 1, Q4 is also turned on, and the reset pin of MCU is pulled low, thereby realizing reset. Then, after a period of time delay, mcusisp controls the DTR to be at a high level, the DTR _ N outputs a low level, the RTS maintains a high level, the RTS _ N continues to be at a low level, at this time, a reset pin of the MCU is turned to be at a high level because Q4 is not turned on any more, the MCU finishes resetting, but the BOOT0 is still maintained at 1, so as to enter an ISP mode, and then mcusisp can start to connect the MCU to download codes, thereby implementing one-key downloading. Meanwhile, the USB can also be used as a USB serial port for parameter configuration.

The monitoring and electric measuring device is also provided with an indicator light unit which indicates the running state of the device and comprises a 3.3V power indicator light, a 485 communication indicator light, an LORA module working indicator light, an LORA module communication indicator light and a loop control indicator light.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, etc.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The utility model provides a wireless illumination control and electricity measuring device which characterized in that, includes MCU, power module, communication unit, electricity measuring unit and the control unit, wherein:

the control unit is provided with three control interface circuits, receives a control signal sent by the MCU and controls the on-off of each phase loop of the three-phase power;

the power module provides power for the device.

2. The wireless lighting monitoring and electrical measuring device as claimed in claim 1, wherein the electrical measuring unit comprises an electrical energy collecting chip, a voltage collecting circuit and a current collecting circuit, wherein the collecting circuit collects voltage and current information of each phase of the three-phase power and transmits the voltage and current information to the electrical energy collecting chip to obtain the electrical energy information of each phase of the three-phase power.

3. A wireless lighting monitoring and electrical measuring device according to claim 1, further comprising a temperature measuring unit, said temperature measurement comprising a temperature sensor for collecting temperature information.

4. The wireless lighting monitoring and electrical testing device of claim 1, wherein the power module comprises a LS03-15B05SR2S power module, which converts ac and dc power to supply power to the device.

5. The wireless lighting monitoring and electrical testing device of claim 4, wherein the power module further comprises a 24V to 5V power unit, a 5V to 3.3V power unit and a button cell unit to provide multiple power sources for the device.

6. A wireless lighting monitoring and electrical testing device according to claim 1, wherein said communication unit comprises one or more of a LORA communication module, a DI input module, or a 485 communication module.

7. The wireless lighting monitoring and electrical logging device of claim 6, wherein the DI input module comprises a DI input port, a transient suppression diode, a photo coupler and a parallel-serial register, and a DI signal is input from the DI input port, passes through the transient suppression diode, the photo coupler and the parallel-serial register in sequence, and then is transmitted to the MCU.

8. The wireless lighting monitoring and electrical measuring device as claimed in claim 1, wherein the control interface circuit comprises a magnetic latching relay, an on control loop and an off control loop, and the on control loop and the off control loop receive the control signal of the MCU to control the magnetic latching relay to be turned on or off.

9. The wireless illumination monitoring and electrical measuring device as claimed in claim 8, wherein the turn-on control loop and the turn-off control loop each comprise a PNP type triode, the emitter of the triode is connected with a 5V reference voltage, the collector of the triode is connected with the control terminal of the magnetic latching relay, the base of the triode is connected with the MCU control signal output terminal through a resistor, and the base and the emitter of the triode are further connected with a resistor.

10. A wireless lighting monitoring and electrical testing device as claimed in claim 1, further comprising a USB download configuration unit, using a CH340G chip, for downloading code or parameter configuration.