CN107422675A - A kind of Internet of Things programmable power supply monitoring system and method - Google Patents

Abstract

A kind of Internet of Things programmable power supply monitoring system and method, system includes host computer, middle-position machine, some programmable power supply monitoring modules, the host computer connects with middle-position machine communication, the middle-position machine connects with programmable power supply monitoring module communication, and the programmable power supply monitoring module includes auxiliary power module, MCU module, ADC, DAC module, power failure data memory module, communication module, energy supply control module；The MCU module is connected with the auxiliary power module, the MCU module, the ADC, the DAC module, the power failure data memory module, the communication module, the energy supply control module respectively；Technical scheme provided by the invention can be monitored in real time to power supply, and access Internet of Things and realize the whole cabinet control of power supply, so as to realize while carry out charge-discharge test to multiple batteries, improve battery production capacity, reduce production cost, the effect of realizing convenient management, and realized by Internet of Things to multiple Digital Controls for testing power supplys and monitoring.

Description

A system and method for monitoring a program-controlled power supply of the Internet of Things

〖Technical field〗

The invention belongs to the field of power monitoring, and in particular relates to a program-controlled power monitoring system and method of the Internet of Things.

〖Background technique〗

With the development of society, batteries are widely used in daily life. Nowadays, regardless of lithium batteries, lead-acid batteries, ternary batteries, etc., charge and discharge tests are required during the production process to ensure battery quality and consistency; the current battery charge and discharge test uses a single power supply, and one by one after the test is completed. Read data; and if a power supply fails and cannot be found in the first place, it will bring huge troubles to production.

Therefore, in order to ensure the safety and yield of batteries leaving the factory, battery charge and discharge testing is very important in the battery production process, and it is also a time-consuming and labor-intensive process. As far as the existing battery charge and discharge test power supply is concerned, it can only be controlled individually, and the test steps must be sent to each power supply for testing. After the test is completed, the test data will be taken out for analysis. The existing technical solution uses single-chip microcomputer technology to operate according to the preset work steps, uses PWM technology to control the power supply to output a specific voltage and current or controls the battery to discharge the resistor, and uses the ADC module to monitor and save the voltage and current data in real time. Analyze the real-time monitored voltage and current data to obtain parameters such as power and capacity, and save relevant parameters to be taken out after the test is completed.

Among them, the disadvantage of the existing technical solutions is that as the demand for batteries increases, the requirements for production capacity are extremely high; however, the battery charge and discharge test is cumbersome and important in the battery production process, such a large number cannot be achieved under the existing single charge and discharge test. Only random inspection can be realized, which will inevitably lead to a decrease in the pass rate, which is undoubtedly a kind of damage to the image of the battery company.

〖Invention content〗

In order to solve the above problems, the present invention provides an Internet of Things program-controlled power supply monitoring system and method, starting from the aspects of improving production capacity, reducing costs, and facilitating management; monitoring the power supply in real time, and connecting to the Internet of Things to realize the control of the entire power supply cabinet, thereby Realize charging and discharging tests on multiple batteries at the same time; the specific technical solutions are as follows:

A program-controlled power supply monitoring system for the Internet of Things, including a host computer, a middle computer, and several program-controlled power supply monitoring modules, the host computer is connected to the middle computer by communication, and the middle computer is connected to the program-controlled power supply monitoring module ; The program-controlled power supply monitoring module includes:

Auxiliary power module, which provides working power for the entire program-controlled power monitoring module;

MCU module to perform signal and data processing;

The ADC module, its input end is connected to the amplitude control signal output end of the MCU module, and the output end is connected to the charge and discharge voltage and current amplitude control end of the monitored power supply;

A power supply control module, the input terminal of which is connected to the output terminal of the working mode control signal of the MCU module, and the output terminal is connected to the working mode control terminal of the monitored power supply;

DAC module, its input end is connected to the current and voltage sampling end of the monitored power supply, and its output end is connected to the sampling signal input end of the MCU module;

A communication module is used to communicate and connect the MCU module with the middle computer;

The power-down data storage module is connected with the MCU data read-write terminal.

As a specific technical solution, the upper computer is wirelessly connected to the middle computer.

As a specific technical solution, the central computer is connected to the program-controlled power supply monitoring module through CAN or RS485.

A power monitoring method based on the above-mentioned Internet of Things program-controlled power monitoring system, comprising the following steps:

The system and peripherals are initialized. The power control module controls the monitored power supply to work in the specified working mode according to the system command. The DAC module controls the monitored power supply to output voltage and current with a specified range according to the system command. The ADC module collects the actual operating voltage of the monitored power supply. and current information;

The MCU module cyclically executes data calculation according to the preset time period, and accumulates the capacity data and energy data during the charging and discharging process of the monitored power supply;

The system judges whether to execute the work mode command parsing and DAC module control according to the data fed back by the MCU module, if yes, execute accordingly, otherwise it does not execute;

During the monitoring process, the power-down data storage module periodically saves real-time data.

As a specific technical solution, the preset time period is specifically 90ms.

As a specific technical solution, if the command analysis receives a stop command, the test power supply will stop working when the test power supply is in the running mode, and the corresponding data will be returned after processing.

As a specific technical solution, if the system finds deviations in voltage or current during the monitoring process, the DAC module controls the voltage and current to reach a stable value.

As a specific technical solution, if the monitored power supply fails or loses power during the monitoring process, the system reads the corresponding data in the power-down data storage module after troubleshooting or power-on again and continues to perform the current test. The battery is charged and discharged.

The Internet of Things program-controlled power supply monitoring system and method provided by the present invention can monitor the power supply in real time, and connect to the Internet of Things to realize the control of the whole power supply cabinet, so it can realize charging and discharging tests on multiple batteries at the same time, indirectly improving the battery production capacity , reduce production costs, realize the effect of convenient management, and realize digital control and monitoring of multiple test power supplies through the Internet of Things.

〖Description〗

Fig. 1 is the main block diagram of the Internet of Things program-controlled power supply monitoring system provided by the present invention.

FIG. 2 is a block diagram of a program-controlled power monitoring module in the Internet of Things program-controlled power monitoring system provided by the present invention.

Fig. 3 is a main flow chart of the method for monitoring the programmable power supply of the Internet of Things provided by the present invention.

Fig. 4 is a flow chart of a specific embodiment of the method for monitoring the programmable power supply of the Internet of Things provided by the present invention.

〖detailed description〗

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the Internet of Things program-controlled power supply monitoring system provided by this embodiment consists of three major blocks, namely, the upper computer, the middle computer and several program-controlled power supply monitoring modules. The host computer performs data analysis and processing, generates and issues control commands, and provides a human-computer interaction interface. The operating status of the program-controlled power supply monitoring module is controlled by the host computer. During the operation, the program-controlled power supply monitoring module collects real-time data through the The host computer is uploaded to the host computer, which is processed by the host computer and displayed, and the central computer plays the role of transfer and expansion. In this embodiment, the upper computer is connected with the middle computer through wireless communication, and the middle computer is connected with the program-controlled power supply monitoring module through CAN or RS485.

As shown in Figure 2, the program-controlled power supply monitoring module includes: auxiliary power supply module, MCU module (main control chip), ADC module (analog-to-digital conversion module), DAC module (digital-to-analog conversion module), power-down data storage module, communication module , Power control module; Among them, the auxiliary power module provides working power for the entire program-controlled power monitoring module; the MCU module communicates with the middle computer through the communication module, and operates according to the work step command sent by the upper computer; the MCU module is controlled by the DAC module and the power supply The module controls the charge and discharge output of the power supply. Specifically, the output amplitude of the power supply is controlled by the DAC module, and the working mode of the power supply is controlled by the power control module according to the high and low levels output by the IO port of the MCU module; the MCU module monitors the voltage of the power supply in real time through the ADC module. , current to collect, analyze the collected data and calculate the data including power supply and power capacity, and upload it to the host computer; the power-off data storage module saves real-time data once per second during the test power supply running test Data, to ensure that the data will not be lost after the test power supply fails or power-off, so that the current test battery can continue to be charged and discharged after troubleshooting or re-powering; the program-controlled power monitoring system communicates with the central computer through the communication module. Real-time communication, the upper computer obtains the data of program-controlled power monitoring from the middle computer for analysis and display, so as to realize the charge and discharge test of the whole cabinet battery.

As shown in Figure 3, the power monitoring method based on the above-mentioned Internet of Things program-controlled power monitoring system includes:

The system and peripherals are initialized. The power control module controls the monitored power supply to work in the specified working mode according to the system command. The DAC module controls the monitored power supply to output voltage and current with a specified range according to the system command. The ADC module collects the actual operating voltage of the monitored power supply. and current information;

The MCU module cyclically executes data calculation according to the preset time period, and accumulates the capacity data and energy data during the charging and discharging process of the monitored power supply;

The system judges whether to execute the work mode command parsing and DAC module control according to the data fed back by the MCU module, if yes, execute accordingly, otherwise it does not execute;

During the monitoring process, the power-down data storage module periodically saves real-time data.

The specific implementation of the above power monitoring method needs to involve several aspects such as coding protocol, program design, specific process and data structure design, etc., which are described in detail below:

1. Coding protocol:

The test protocol of the above program-controlled power supply monitoring system is programmed in C language, and the protocol is customized on the basis of the RS-485 link layer. The protocol format is shown in the following table:

sync word Serial number Device No Data length control type data area check terminator 0xAB 1～8 1～10/0x33 no command code no CRC check 0x11

Synchronization word: 0xAB, the beginning of the command, as the start of the command.

Serial port number: 1~8, indicating the RS-485 bus number managed by the central computer, up to 8.

Device number: 1~10, indicating the address of the RS-485 slave, here indicating the address of the program-controlled power supply monitoring; 0x33: indicating broadcast commands, and the program-controlled power supply monitoring does not respond.

Control type: the control command code issued by the host computer.

Checksum: checksum data calculated from the start of the sync word to the last bit in the data area.

Terminator: 0x11, the end of the command, indicating the end of the command.

2. The program design based on the above protocol format is as follows:

The program design is based on the sequence structure, the power control is processed sequentially in a large cycle, and the interrupt service program is embedded. The program adopts layered modular design, including driver layer and application layer.

The driver layer mainly refers to the main clock, interrupt, IO, timer and peripheral chip drivers of the main control chip, and the application layer mainly refers to ADC sampling filtering, DAC given output, RS-485 command sending and analysis, etc.

The program-controlled power monitoring program loops between ADC sampling, DAC setting, and working mode processing. When an interrupt is generated, the interrupt service program is executed immediately. If the serial port interrupt is received, the interrupt service program is executed immediately to receive the data, and when the data reception is completed, it returns to the large loop to execute command parsing, execute the command and return a response.

3. The specific program flow chart is shown in Figure 4, in which:

System initialization and peripheral initialization first initialize the operating environment of the main control chip, and then initialize the peripheral chips for use when the program-controlled power monitoring program is executed.

The ADC module collects the actual operating voltage and current values of the power supply and converts them into digital signals. And convert it in the actual value calculation module, and convert it into actual voltage and current.

The calculation of capacity, energy and other data is performed every 90ms, and the capacity and energy during the charging and discharging process are accumulated.

Command analysis is the control command received by the host computer, and the corresponding operation is performed according to the protocol. If a stop command is received, the power supply will stop working when the power supply is in the running mode, and the corresponding data will be returned after the processing is completed.

The DAC module controls the power supply to output the specified voltage and current according to the commands issued by the host computer. If the voltage or current deviates during the operation of the power supply, the DAC module controls the voltage and current to reach a stable value.

The power-down data storage module saves real-time data once per second during the test power supply running test to ensure that the data will not be lost after the test power supply fails or power-off, so that the current test battery can be continued after troubleshooting or power-on again Proceed to charge and discharge test.

4. Data structure design:

According to the program design, the shared data structure defined between each module is as follows:

RS-485 communication structure:

State data structure:

The above embodiments are only sufficient disclosures and do not limit the present invention. Any replacement of equivalent technical features based on the creative spirit of the present invention and without creative work should be regarded as the disclosure scope of this application.

Claims (8)

1. a kind of Internet of Things programmable power supply monitoring system, it is characterised in that including host computer, middle-position machine, some programmable power supplys prison Module is controlled, the host computer connects with middle-position machine communication, and the middle-position machine connects with programmable power supply monitoring module communication Connect；The programmable power supply monitoring module includes：

Auxiliary power module, working power is provided for whole programmable power supply monitoring module；

MCU module, perform signal and data processing；

ADC, its input connect the amplitude control signal output end of MCU module, and the output end monitored power supply of connection fills Discharge voltage and current amplitude control terminal；

Energy supply control module, its input connect the operating mode control signals output end of MCU module, and output end connection is monitored The mode of operation control terminal of power supply；

DAC module, the electric current of the monitored power supply of its input connection, voltage sampling port, the sampling letter of output end connection MCU module Number input；

Communication module, MCU module and middle-position machine communication are connected；

Power failure data memory module, it is connected with MCU reading and writing datas end.

2. Internet of Things programmable power supply monitoring system according to claim 1, it is characterised in that the host computer with it is described in Position machine wireless telecommunications connection.

3. Internet of Things programmable power supply monitoring system according to claim 1, it is characterised in that the middle-position machine and the journey Control Power Monitoring Unit passes through CAN or RS485 connections.

A kind of 4. method for monitoring power supply based on Internet of Things programmable power supply monitoring system described in claim 1, it is characterised in that bag Include following steps：

System and peripheral hardware initialization, energy supply control module is by the monitored power work of system command control in specified Working mould Formula, DAC module is by voltage, the electric current of the monitored power supply output designated magnitude of system command control, the monitored electricity of ADC collection The voltage and current information of source actual motion；

Section circulation execution data calculate MCU module at preset timed intervals, and the capacity data to being monitored in power supply charge and discharge process, Energy datum is added up；

The data that the system is fed back according to the MCU module carry out judging whether to perform mode of operation command analysis, DAC moulds Block controls, and is accordingly to perform, does not otherwise perform；

During monitoring, the power failure data memory module periodically preserves real time data.

5. method for monitoring power supply according to claim 4, it is characterised in that the preset time period is specially 90ms.

6. method for monitoring power supply according to claim 4, it is characterised in that if the command analysis receives stopping life Order, then test power supply is stopped when testing power supply and being operational mode, corresponding data are returned again to after Chu Liwan.

7. method for monitoring power supply according to claim 4, it is characterised in that if the system finds electricity in monitoring process There is deviation in pressure or electric current, then the DAC module control voltage, electric current reach stationary value.

8. method for monitoring power supply according to claim 4, it is characterised in that if power supply is monitored in monitoring process event occurs Barrier or power down, then the system read respective counts in the power failure data memory module after fixing a breakdown or re-powering According to and continue to carry out charge-discharge test to current test battery.