Vehicle-mounted power supply inspection system and method based on LoRa technology

Abstract

The invention discloses a vehicle-mounted power supply inspection system and method based on a LoRa technology. The system comprises a handheld terminal inspection instrument and a plurality of vehicle-mounted power supply information acquisition devices arranged in different vehicles. The handheld terminal inspection instrument communicates with the vehicle-mounted power supply information acquisition equipment in a wireless mode, manages data received from the vehicle-mounted power supply information acquisition equipment in a centralized mode, and communicates with a far-end vehicle-mounted power supply storage battery management platform in a wireless, wired or USB mobile storage medium mode. And the collected data is sent to a far-end vehicle-mounted power supply storage battery management platform, so that equipment maintenance and management personnel can accurately master the equipment state. According to the invention, the power supply information acquisition equipment is installed in a vehicle, and the handheld terminal inspection instrument collects data and is designed to be in a carrying mode, so that LoRa communication is more flexible and convenient, and the requirement of wireless transmission of vehicle-mounted power supply information in field places can be completely met; the number of the power supply information acquisition devices can be expanded, the hand-held terminal inspection instrument is flexibly deployed, the data transmission has high real-time performance and reliability, the fault positioning is scientific and accurate, and the working efficiency of management personnel is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle power management, and in particular relates to a vehicle power inspection system and method based on LoRa technology. Background Art

[0002] Currently, special equipment vehicles, such as communication vehicles and command vehicles, have three power supply modes: mains electricity, diesel engine, and battery. There are often some problems in daily use, such as: large voltage fluctuations in the field, which cannot be monitored and cannot work normally; battery degradation, which is not accurately detected, etc.; especially in the vehicle battery power supply mode, the battery status is unclear, performance detection and maintenance are difficult, resulting in increased maintenance costs, and safety problems are prone to occur, affecting normal work. In terms of daily management and maintenance of vehicle power supplies, there are no solutions in this field on the market. Summary of the invention

[0003] In view of the above problems, the present invention provides a patrol inspection system and method for an on-board integrated power supply based on LoRa technology. Without entering the interior of the vehicle, the on-board power supply can be detected simply by patrolling the site. This is accurate and efficient, and convenient for daily equipment inspection and management.

[0004] The technical solution to achieve the purpose of the present invention is a vehicle-mounted power inspection system based on LoRa technology, comprising: a plurality of power information collection devices and handheld terminal inspection instruments installed inside different vehicles; the power information collection devices and the handheld terminal inspection instruments are connected via a LoRa wireless spread spectrum signal; The power information acquisition device includes a microcontroller unit MCU, a mains voltage detection module, a mains current detection module, an oil engine voltage detection module, an oil engine current detection module, a battery voltage detection module, a battery current detection module, a battery temperature detection module, a LoRa communication module, a button module, a liquid crystal display module, and a system indicator light; the power information acquisition device can set a sleep time, keep waking up regularly to collect data, detect LoRa communication module signals, and respond to instructions sent by a handheld terminal inspection instrument; The handheld terminal inspection instrument is composed of hardware and software. The hardware includes: mainboard, microcontroller unit MCU, storage module, LoRa gateway module, key module, LCD display module, communication module, etc. The software is the built-in power management system of the handheld terminal inspection instrument, which mainly includes power data analysis module, information display module, system setting module, and database; Furthermore, in the vehicle-mounted power inspection system based on LoRa technology, in the power information collection device, the microcontroller unit MCU is set to a periodic sleep and wake-up working mode, and the data collection time interval can be set to regularly collect the power data status; when in sleep mode, the MCU of the power information collection device is in sleep mode, and the whole machine saves power.

[0005] Furthermore, the setting module in the power management system software of the handheld terminal inspection instrument includes a time setting module, an alarm setting module, a network setting module, and an SMS setting module, which realizes the time setting function, power abnormality alarm function, network setting function, and SMS reminder function of the power information collection equipment.

[0006] Furthermore, the handheld terminal inspection instrument adopts two modes of power supply: built-in battery power supply and AC power supply.

[0007] The vehicle power inspection method based on LoRa technology specifically includes the following steps: Step 1: Install a power information collection device in each communication vehicle, and the management personnel assign and set the license plate number and the power information collection device to determine the one-to-one correspondence between the two; Step 2: The administrator carries the handheld terminal inspection instrument to inspect the parking lot. After pressing the collection button on the inspection instrument, the microcontroller unit MCU of the inspection instrument responds to the button command, encodes the command into a LoRa protocol data packet, and sends it to the LoRa communication module of the power information collection device installed on each vehicle through the LoRa gateway module on the inspection instrument; Step 3: When the LoRa communication module of the power information acquisition device receives the acquisition instruction of the LoRa gateway module of the handheld terminal inspection instrument, the microcontroller unit MCU of the power information acquisition device will control the AC voltage detection module, the AC current detection module, the oil engine voltage detection module, and the oil engine current detection module to respectively collect the voltage signal and current signal of the AC power supply port and the oil engine power supply port of the distribution box; and collect the voltage signal of each cell, the temperature signal of each cell, and the voltage signal of the entire battery group from the battery in the battery box through the battery voltage detection module, the battery current detection module, and the battery temperature detection module. signal, the whole group of battery current signal; then the microcontroller unit MCU of the power information acquisition device will rectify, filter, analog-to-digital conversion and calculate all the collected local power signals to obtain the local vehicle number, acquisition time, AC voltage and current, oil engine voltage and current, battery whole group voltage and current, each monomer voltage, temperature, internal resistance data and other local power data information, and display them on the display screen of the power information acquisition device at the same time; finally, the microcontroller unit MCU will encapsulate the collected local power data information into data messages, and send them to the LoRa gateway module of the handheld terminal inspection instrument in real time through the LoRa communication module of the power information acquisition device; Step 4: When the LoRa gateway module of the handheld terminal inspection instrument receives the message containing the local power data information sent by the LoRa communication module of the power information acquisition device, the power data parsing module of the power management system software in the handheld terminal inspection instrument processes the message and parses out the vehicle number, acquisition time, AC voltage and current, engine voltage and current, battery pack voltage and current, and each single battery voltage, internal resistance, and temperature; then this information is stored in the database, and the local power data is managed, queried, counted and analyzed. The information display module displays it in a visual form or generates a report, providing managers with a scientific and accurate basis for power status management.

[0008] Furthermore, the power supply abnormality alarm function is specifically implemented in the following ways: In the system setting module of the power management system software in the handheld terminal inspection instrument, set the voltage alarm threshold value of the AC power supply, the voltage alarm threshold value of the battery, and the internal resistance alarm threshold value according to the technical requirements of the equipment power supply; When the power management system software in the handheld terminal inspection instrument parses the received data message, if the detected voltage value and internal resistance value are higher than the alarm threshold value set by the system, an alarm pop-up window will be displayed on the desktop immediately, an alarm prompt will be sounded, or the communication module will send an alarm text message to the set mobile phone number to prompt the maintenance personnel to handle it.

[0009] The present invention has the following beneficial effects: 1. The vehicle power inspection system built based on LoRa technology solves the practical problem that mobile vehicles cannot lay wired lines for data collection and transmission. In the field of vehicle power management, it has good innovation and can meet the application needs of power quality management of similar special vehicles.

[0010] 2. The system design builds a low-power working plan and execution process. Low-power components are selected, and circuit switch control and sleep wake-up methods are adopted to achieve low-power operation of the system, ensuring the power consumption requirements and power supply safety of the vehicle system.

[0011] 3. The spread spectrum signal wireless communication based on LoRa technology transmits power parameter information, and the data transmission has high real-time and reliability.

[0012] 4. The handheld terminal inspection instrument is designed to be portable, making LoRa communication more flexible and convenient, and can fully meet the needs of wireless transmission of vehicle power information in garages, parking lots, ordinary office areas and outdoor places. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the vehicle power inspection system based on LoRa technology; Figure 2 It is a schematic diagram of the hardware structure of the power information acquisition device; Figure 3 It is a schematic diagram of the software architecture of the power management system of the handheld terminal inspection instrument. DETAILED DESCRIPTION

[0014] The vehicle power inspection system based on the LoRa protocol of the present invention measures the AC interface of the vehicle communication power supply, the oil engine interface, the battery pack 24V, 48V, and the lead-acid battery with a single voltage of 2V, 6V, and 12V.

[0015] The vehicle power inspection system based on LoRa technology of the present invention comprises: a plurality of power information collection devices and handheld terminal inspection instruments placed inside different vehicles. The power information collection devices and handheld terminal inspection instruments are connected via LoRa wireless spread spectrum signals. Figure 1 shown.

[0016] The power information acquisition device includes a microcontroller unit MCU, a mains voltage detection module, a mains current detection module, an oil engine voltage detection module, an oil engine current detection module, a battery voltage detection module, a battery current detection module, a battery temperature detection module, a LoRa communication module, a button module, a liquid crystal display module, and a system indicator light; the hardware structure diagram of the power information acquisition device is as follows Figure 2 The power information acquisition device can set the sleep time, maintain the regular data collection, detect the LoRa communication module signal, and respond to the instructions sent by the handheld terminal inspection instrument.

[0017] In the present invention, in the power information collection device, the micro control unit MCU is set to a periodic sleep and wake-up working mode, and the data collection time interval can be set to regularly collect power data status; when in sleep mode, the MCU of the power information collection device sleeps, and the whole machine saves power.

[0018] The handheld terminal inspection instrument is composed of hardware and software. The hardware includes: mainboard, microcontroller unit MCU, storage module, LoRa gateway module, key module, LCD display module, communication module, etc. The software is the built-in power management system of the handheld terminal inspection instrument, which mainly includes power data analysis module, information display module, system setting module, and database; Furthermore, in the vehicle-mounted power inspection system based on LoRa technology, in the power information collection device, the microcontroller unit MCU is set to a periodic sleep and wake-up working mode, and the data collection time interval can be set to regularly collect the power data status; when in sleep mode, the MCU of the power information collection device is in sleep mode, and the whole machine saves power.

[0019] The setting modules in the power management system software of the handheld terminal inspection instrument include time setting module, alarm setting module, network setting module and SMS setting module, which realize the time setting function, power abnormality alarm function, network setting function and SMS prompt function of the power information collection equipment.

[0020] The handheld terminal inspection instrument consists of hardware and software. The hardware is a portable device developed based on the embedded industrial computer motherboard, mainly including: motherboard, microcontroller unit MCU, storage module, LoRa gateway module, key module, LCD display module, communication module, etc. The software is the built-in power management system of the handheld terminal inspection instrument, mainly including power data analysis module, information display module, system setting module, and database. The architecture of the power management system is as follows: Figure 3 shown.

[0021] The handheld terminal inspection instrument communicates with the power information collection equipment wirelessly, centrally manages the data received from the power information collection equipment, and collects and processes various types of data submitted by the power information collection equipment of all vehicles under its jurisdiction (one handheld terminal inspection instrument can manage the power information collection equipment installed on multiple vehicles), and displays them locally in a visual form, so that equipment maintenance managers can accurately grasp the equipment status.

[0022] The LoRa module uses the ZM470SX module from Guangzhou Zhiyuan Electronics, with an SPI interface, a transmission power of 20dbm, and a receiving sensitivity of -148dbm. It has low packet loss rate and stability.

[0023] The vehicle-mounted power supply inspection method based on LoRa technology of the present invention comprises the following steps: Step 1: Install a power information collection device in each communication vehicle, and the management personnel assign and set the license plate number and the power information collection device to determine the one-to-one correspondence between the two; Step 2: The administrator carries the handheld terminal inspection instrument to inspect the parking lot. After pressing the collection button on the inspection instrument, the microcontroller unit MCU of the inspection instrument responds to the button command, encodes the command into a LoRa protocol data message, and sends it to the LoRa communication module of the power information collection device installed on each vehicle through the LoRa gateway module on the inspection instrument; Step 3: When the LoRa communication module of the power information acquisition device receives the acquisition instruction of the LoRa gateway module of the handheld terminal inspection instrument, the microcontroller unit MCU of the power information acquisition device will control the AC voltage detection module, the AC current detection module, the oil engine voltage detection module, and the oil engine current detection module to respectively collect the voltage signal and current signal of the AC power supply port and the oil engine power supply port of the distribution box; and collect the voltage signal of each cell, the temperature signal of each cell, and the voltage signal of the entire battery group from the battery in the battery box through the battery voltage detection module, the battery current detection module, and the battery temperature detection module. signal, the whole group of battery current signal; then the microcontroller unit MCU of the power information acquisition device will rectify, filter, analog-to-digital conversion and calculate all the collected local power signals to obtain the local vehicle number, acquisition time, AC voltage and current, oil engine voltage and current, battery whole group voltage and current, each monomer voltage, temperature, internal resistance data and other local power data information, and display them on the display screen of the power information acquisition device at the same time; finally, the microcontroller unit MCU will encapsulate the collected local power data information into data messages, and send them to the LoRa gateway module of the handheld terminal inspection instrument in real time through the LoRa communication module of the power information acquisition device; Step 4: When the LoRa gateway module of the handheld terminal inspection instrument receives the message containing the local power data information sent by the LoRa communication module of the power information acquisition device, the power data parsing module of the power management system software in the handheld terminal inspection instrument processes the message and parses out the vehicle number, acquisition time, AC voltage and current, engine voltage and current, battery pack voltage and current, and each single battery voltage, internal resistance, and temperature; then this information is stored in the database, and the local power data is managed, queried, counted and analyzed. The information display module displays it in a visual form or generates a report, providing managers with a scientific and accurate basis for power status management.

[0024] The system setting module of the power management system software of the handheld terminal inspection instrument includes a time setting module, an alarm setting module, a network setting module, and a text message setting module, which realizes the time setting function, power abnormality alarm function, network setting function, and text message prompt function of the power information collection equipment.

[0025] The purpose of equipment inspection is to promptly and accurately discover and deal with problems and hidden dangers to ensure the normal working state of the equipment. The power abnormality alarm function of the handheld terminal inspection instrument is implemented in the following ways: 1. In the system setting module of the power management system of the handheld terminal inspection instrument, the voltage alarm threshold value of the AC power supply, the voltage alarm threshold value of the battery and the internal resistance alarm threshold value are set according to the technical requirements of the equipment power supply.

[0026] 2. The alarm method can be set to system desktop pop-up window, alarm prompt sound, bar chart color change, send alarm text messages to the administrator's mobile phone, etc.

[0027] 3. When the power management system of the handheld terminal inspection instrument is parsing the received data message, if the detected voltage value and internal resistance value are higher than the alarm threshold value set by the system, the system will immediately pop up an alarm window with the content of X car X AC voltage value is XX volts, fault. Or X car X battery voltage value is X volts, internal resistance is X ohms, fault, please deal with it in time. A prompt tone alarm is issued. The data table is red, and the bar graph will be displayed in red and orange according to the difference. A text message is also sent to the mobile phone number of the manager to prompt the manager to deal with it.

Claims

1. The vehicle power inspection system based on LoRa technology is characterized by: include: Several power information collection devices and handheld terminal inspection instruments installed inside different vehicles; The power information collection device and the handheld terminal inspection instrument are connected via a LoRa wireless spread spectrum signal; The power information acquisition device includes a microcontroller unit MCU, a mains voltage detection module, a mains current detection module, an oil engine voltage detection module, an oil engine current detection module, a battery voltage detection module, a battery current detection module, a battery temperature detection module, a LoRa communication module, a button module, a liquid crystal display module, and a system indicator light; the power information acquisition device can set a sleep time, keep waking up regularly to collect data, detect LoRa communication module signals, and respond to instructions sent by a handheld terminal inspection instrument; The handheld terminal inspection instrument is composed of hardware and software; The hardware includes: mainboard, microcontroller unit MCU, storage module, LoRa gateway module, button module, LCD display module, communication module; The software is a power management system built into the handheld terminal inspection instrument, including a power data analysis module, an information display module, a system setting module, and a database.

2. The vehicle-mounted power inspection system based on LoRa technology as claimed in claim 1, characterized in that: In the power information collection device, the microcontroller unit MCU is set to a periodic sleep-wake-up working mode, and the data collection time interval can be set to regularly collect power data status; when in sleep mode, the MCU of the power information collection device is in sleep mode, and the whole machine saves power.

3. The vehicle-mounted power inspection system based on LoRa technology as claimed in claim 2, characterized in that: The system setting module of the power management system of the handheld terminal inspection instrument includes a time setting module, an alarm setting module, a network setting module, and a text message setting module, which realizes the time setting function, power abnormality alarm function, network setting function, and text message prompt function of the power information collection equipment.

4. The vehicle-mounted power inspection system based on LoRa technology as claimed in claim 3, characterized in that: The handheld terminal inspection instrument adopts two power supply modes: built-in battery power supply and AC power supply.

5. The vehicle power inspection method based on LoRa technology is characterized by: The vehicle-mounted power supply inspection system according to claim 4 specifically comprises the following steps: Step 1: Install a power information collection device in each communication vehicle, and the management personnel assign and set the license plate number and the power information collection device to determine the one-to-one correspondence between the two; Step 2: The administrator carries the handheld terminal inspection instrument to inspect the parking lot. After pressing the collection button on the inspection instrument, the microcontroller unit MCU of the inspection instrument responds to the button command, encodes the command into a LoRa protocol data packet, and sends it to the LoRa communication module of the power information collection device installed on each vehicle through the LoRa gateway module on the inspection instrument; Step 3: When the LoRa communication module of the power information acquisition device receives the acquisition instruction of the LoRa gateway module of the handheld terminal inspection instrument, the microcontroller unit MCU of the power information acquisition device will control the AC voltage detection module, the AC current detection module, the oil engine voltage detection module, and the oil engine current detection module to respectively collect the voltage signal and current signal of the AC power supply port and the oil engine power supply port of the distribution box; and collect the voltage signal of each cell, the temperature signal of each cell, and the voltage signal of the entire battery group from the battery in the battery box through the battery voltage detection module, the battery current detection module, and the battery temperature detection module. signal, the whole group of battery current signal; then the microcontroller unit MCU of the power information acquisition device will rectify, filter, analog-to-digital conversion and calculate all the collected local power signals to obtain the local vehicle number, acquisition time, AC voltage and current, oil engine voltage and current, battery whole group voltage and current, each monomer voltage, temperature, internal resistance data and other local power data information, and display them on the display screen of the power information acquisition device at the same time; finally, the microcontroller unit MCU will encapsulate the collected local power data information into data messages, and send them to the LoRa gateway module of the handheld terminal inspection instrument in real time through the LoRa communication module of the power information acquisition device; Step 4: When the LoRa gateway module of the handheld terminal inspection instrument receives the message containing the local power data information sent by the LoRa communication module of the power information acquisition device, the power data parsing module of the power management system software in the handheld terminal inspection instrument processes the message and parses out the vehicle number, acquisition time, AC voltage and current, engine voltage and current, battery pack voltage and current, and each single battery voltage, internal resistance, and temperature; then this information is stored in the database, and the local power data is managed, queried, counted and analyzed. The information display module displays it in a visual form or generates a report, providing managers with a scientific and accurate basis for power status management.

6. The vehicle-mounted power inspection method based on LoRa technology as claimed in claim 5, characterized in that: The power supply abnormality alarm function is implemented in the following ways: In the system setting module of the power management system software in the handheld terminal inspection instrument, set the voltage alarm threshold value of the AC power supply, the voltage alarm threshold value of the battery, and the internal resistance alarm threshold value according to the technical requirements of the equipment power supply; When the power management system software in the handheld terminal inspection instrument parses the received data message, if the detected voltage value and internal resistance value are higher than the alarm threshold value set by the system, an alarm pop-up window will be displayed on the desktop immediately, an alarm prompt will be sounded, or the communication module will send an alarm text message to the set mobile phone number to prompt the maintenance personnel to handle it.

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