CN105843089A - Method of controlling vehicle terminal - Google Patents
Method of controlling vehicle terminal Download PDFInfo
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- CN105843089A CN105843089A CN201610149207.4A CN201610149207A CN105843089A CN 105843089 A CN105843089 A CN 105843089A CN 201610149207 A CN201610149207 A CN 201610149207A CN 105843089 A CN105843089 A CN 105843089A
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- car
- mounted terminal
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The invention discloses a method for controlling a vehicle terminal, and relates to the field of construction machinery, to solve the problem that a vehicle terminal of a construction machinery remote monitoring system disclosed in the prior art fails to meet actual needs. The control method comprises the steps of G1, reading out currently stored data of a vehicle terminal and conducting assignment to initialize the vehicle terminal; G2, initializing interrupts corresponding to various categories of data in the vehicle terminal; and G3, completing the transmission and reception of various categories of data in the vehicle terminal by priority of the interrupts. The method for controlling the vehicle terminal can meet actual needs of a construction machinery remote monitoring system.
Description
Technical field
The present invention relates to engineering machinery field, particularly relate to the control method of a kind of car-mounted terminal.
Background technology
Along with microelectric technique, control technology, network communications technology, GPS (global positioning system Global
Positioning System) technology and GIS (GIS-Geographic Information System Geographic Information Systems)
The development of technology, engineering machinery remote monitering system arises.Emphasis according to application is different, engineering
Mechanical remote monitoring system is mainly made up of Surveillance center and car-mounted terminal two parts, it is possible to achieve to the most single
The status monitoring of machine, fault diagnosis, it is achieved group of planes construction dispatching, decision-making and most optimum distribution of resources, improve pin
Sell the after-sale service level of enterprise, strengthen the management to machinery of paying by instalments after lease and control etc..
But the car-mounted terminal of engineering machinery remote monitering system disclosed in prior art can not meet actual need
Want.
Summary of the invention
The invention provides the control method of a kind of car-mounted terminal, in order to solve engineering machine disclosed in prior art
The car-mounted terminal of tool long distance control system can not meet the problem being actually needed.
The control method of a kind of car-mounted terminal of the present invention, comprises the following steps: that G1, reading car-mounted terminal are worked as
The data of front storage assignment, make car-mounted terminal initialize；Each classification number in G2, initialization car-mounted terminal
According to corresponding interruption；G3, priority orders according to each interruption, complete each categorical data in car-mounted terminal
Transmitting-receiving.
Further, each function interrupted includes: serial ports interrupts 1 and is used for receiving radio network information and processing；
Serial ports interrupts 2 and is used for receiving GPS information and parsing location data；External interrupt 1 is used for receiving CAN
Data；Timer interruption 0 is used for changing heart beating LED status；Heartbeat message is sent to CAN；
And send this car-mounted terminal current state by wireless network to external equipment.
Wherein the execution step of timer interruption 0 includes: timer interruption 0 is according in long circulating time default
Disconnected, and often enter and once circulate, then numeration variable adds one；The numeration time corresponding to variable reaches display lamp
When state changes the time, then change LED status；When reaching the time sending CAN heart beating, then
Heartbeat message is sent to CAN；When reaching the netting twine network information transfer time, then pass through wireless network
This car-mounted terminal current state is sent to external equipment.
The control method of the car-mounted terminal of the present invention can meet being actually needed of engineering machinery remote monitering system.
Accompanying drawing explanation
Fig. 1 is the car-mounted terminal structural representation of the engineering machinery remote monitering system in the embodiment of the present invention；
Fig. 2 is the car-mounted terminal structural representation of preferred engineering machinery remote monitering system in the embodiment of the present invention
Figure；
Fig. 3-1 is MCU single-chip microcomputer 11 circuit diagram in the embodiment of the present invention；
Fig. 3-2 is the circuit diagram of the serial port level conversion chip MAX3232 in the embodiment of the present invention；
Fig. 4-1 is that the power module of voltage regulation 16 in the embodiment of the present invention is to the electricity of MCU single-chip microcomputer 11 power supply
Lu Tu；
Fig. 4-2 is that the power module of voltage regulation 16 in the embodiment of the present invention is to GSM/GPRS network communication module
The circuit diagram of 141 and GPS locating module 132 power supplies；
Fig. 5 is temperature measurement module 133 circuit diagram in the embodiment of the present invention；
Fig. 6 is the thermometric flow chart in the embodiment of the present invention；
Fig. 7 is the circuit diagram of the human-computer interaction module 15 in the embodiment of the present invention；
Fig. 8 is the man-machine interaction logic chart in the embodiment of the present invention；
Fig. 9-1 is the circuit diagram of the GSM/GPRS network communication module 141 in the embodiment of the present invention；
Fig. 9-2 is the circuit diagram of the SIM in the embodiment of the present invention；
Figure 10 is the flow chart that the GSM/GPRS information in the embodiment of the present invention receives and processes；
Figure 11 is to store data flowchart by EEPROM in the embodiment of the present invention；
Figure 12 is the circuit diagram of the DO output module 12 in the embodiment of the present invention；
Figure 13 is the circuit diagram of the GPS locating module 132 in the embodiment of the present invention；
Figure 14 is that in the embodiment of the present invention, MCU single-chip microcomputer receives GPS information and parses location data
Flow chart；
Figure 15-1 is the circuit diagram of the bus control unit MCP2515 chip in the embodiment of the present invention；
Figure 15-2 is the circuit diagram of the bus transceiver TJA1050 chip in the embodiment of the present invention；
Figure 15-3 is a kind of circuit diagram of the high speed photo coupling isolating chip 6N137 in the embodiment of the present invention；
Figure 15-4 is the another kind of circuit diagram of the high speed photo coupling isolating chip 6N137 in the embodiment of the present invention；
Figure 15-5 is the power isolation module of the CAN communication module 131 in the embodiment of the present invention
The circuit diagram of B0505S；
Figure 16 is the flow chart that the CAN data in the embodiment of the present invention update and preserve；
Figure 17 is the car-mounted terminal overall control flow figure in the embodiment of the present invention；
Figure 18 is the execution flow chart of the timer interruption 0 in the embodiment of the present invention；
Figure 19 is the control method flow chart of the car-mounted terminal in the embodiment of the present invention；
Figure 20 is the control method flow chart of preferred car-mounted terminal in the embodiment of the present invention.
Detailed description of the invention
Discovery is studied, on prior art hardware or do not have CAN (controller local area network through inventor
Controller Area NetWork) bus communication function or do not have DO (numeral output Digital
Output) output function or do not have human-computer interaction function or power supply unreliable etc.；On software or
Due to can not multi-task parallel and occurring confiscate teleinstruction or human-computer interaction interface is friendly not or
Person changes information every time and can not preserve.All can not meet the needs of engineering machinery remote monitering.
Therefore, it is an object of the invention to provide the knot of the car-mounted terminal of a kind of engineering machinery remote monitering system
Structure principle and workflow, be mountable on each engineering machinery construction equipment, and Real-time Collection target device is worked as
Before GPS location, CAN communication, the information such as local environment temperature, be shown on liquid crystal display screen, show
Field staff can switch the different pages by membrane keyboard and check.Meanwhile, car-mounted terminal is by wireless public affairs
Net GSM (global system for mobile communications Global System of Mobile communication)/GPRS
In (general packet radio service technology General Packet Radio Service) Internet service and
SMS (Short Messaging Service) and Surveillance center's communication, information collection being aggregated into uploads to
Surveillance center, and receive Surveillance center's instruction, the output of DO circuit, or change configuration is controlled according to instruction,
Realize remotely controlling and maintenance function of equipment.And then solve existing car-mounted terminal information gathering, data process,
The technical problems such as man-machine interaction, telecommunication and versatility.
Shown in Figure 1, the car-mounted terminal of the engineering machinery remote monitering system in the embodiment of the present invention includes:
MCU (Micro Control Unit micro-control unit) single-chip microcomputer 11；Respectively with MCU single-chip microcomputer 11 phase
DO output module 12 even, information acquisition module 13, and wireless network communication module 14.Wherein,
MCU single-chip microcomputer 11 controls DO output module 12, information acquisition module 13, and wireless network communication
The work of module 14；The instruction output that MCU single-chip microcomputer 11 is sent by DO output module 14；Information is adopted
Collection module 13 gathers the information of engineering machinery belonging to this terminal, and by MCU single-chip microcomputer 11 to collecting
Data process；Wireless network communication module 14 completes MCU single-chip microcomputer 11 with outer by wireless network
Communication between portion's equipment (such as: Surveillance center).
Module in refinement Fig. 1 further, shown in Figure 2, the engineering machinery in the embodiment of the present invention is remote
The car-mounted terminal of range monitoring system includes: MCU single-chip microcomputer 11, DO output module 12；
Information acquisition module 13 at least includes one of following modules: CAN communication module 131, it is even
It is connected in the CAN of engineering mechanical device, for receiving the data of communication in CAN, and with
MCU single-chip microcomputer 11 carries out data exchange；GPS locating module 132, it gathers gps data, and by
The MCU single-chip microcomputer 11 data to collecting carry out gps data protocol analysis；Temperature measurement module 133, it is surveyed
Amount ambient temperature, and by MCU single-chip microcomputer, the temperature data measured is processed.
Human-computer interaction module 15, for showing the information that information acquisition module 13 gathers, and to MCU
Single-chip microcomputer 11 forwards control instruction.
Power module of voltage regulation 16, is used for providing stable voltage.
Wireless network communication module 14 can be GSM/GPRS network communication module 141.
Hereinafter above-mentioned each module is described in further detail.
MCU single-chip microcomputer 11 is the core of whole car-mounted terminal, is responsible for coordinating the work between modules, adopts
It is core structure with high speed, low-power consumption, superpower jamproof 8051 single-chip microcomputer STC12C5A60S2 of new generation
Become.MCU single-chip microcomputer 11 circuit connection is as shown in figure 3-1.Single-chip microcomputer working station indicator D5 passes through
11 first pins of current-limiting resistance R25 and MCU single-chip microcomputer are connected, by programme-control MCU single-chip microcomputer
The 11 periodic output low levels of this pin, thus control D5 and constantly flash, report to extraneous single-chip microcomputer and run
Normally, endless loop is not entered into.11 second pins of MCU single-chip microcomputer pass through current-limiting resistance R26 and three poles
The base stage of pipe T1 is connected, ground connection after the colelctor electrode series connection alarm buzzer BEEP1 of T1, the emitter stage of T1
It is connected with power supply VCC.When system makes a mistake, single-chip microcomputer the second pin will export high level,
Open the collector and emitter conducting of audion T1, audion T1, make alarm buzzer BEEP1 send out
Acoustic alarm, reminds field personnel to note.The RST pin of MCU single-chip microcomputer 11 meets electrochemical capacitor E3
Negative pole be followed by ground connection after power supply VCC, and current-limiting resistance R27, be used for monitoring single-chip microcomputer and power electricity
Pressure VCC, when VCC is less than the detection threshold voltage of electrification reset circuit, all logic circuits all can be answered
Position；When VCC recovers normal voltage again, after postponing some clocks, electrification reset terminates.Serial port power
The circuit diagram of flat conversion chip MAX3232 as shown in figure 3-2, utilizes serial port level conversion chip
The two of single-chip microcomputer rs 232 serial interface signals are mated by MAX3232 with serial ports of computers TTL signal, facilitate system
Computer is debugged.Microcontroller serial port one 10,11 pin and serial ports 23,4 pin respectively with MAX3232
The 12 of chip, 11 pins and 9,10 pins are connected, and MAX3232 chip is little in the outside of four 0.1 μ F
Size charge pump capacitor E6, E7, E8, E9 cooperation under, it is ensured that 14,13 pins and 7,8 pins exist
The level communication of RS-232 is maintained under 120kbps data rate.
Power module of voltage regulation 16 is used for vehicle-mounted 24V Power convert being that 5V powers to MCU single-chip microcomputer 11,
5V single-chip microcomputer power supply is converted to 4V power to GSM/GPRS network communication module 141, by 4V
GSM/GPRS network communication module 141 power supply is converted to 3.3V and powers to GPS locating module 132.
Power module of voltage regulation 16 gives the partial circuit of MCU single-chip microcomputer 11 power supply, as shown in Fig. 4-1.
LM2596 regulator is that step down supplies manages monolithic integrated optical circuit (the i.e. first power management list
Sheet integrated circuit), it is possible to the driving electric current of output 3A, there is the most linear and load regulation characteristic simultaneously.
It is that 5V power supply is powered to MCU Single Chip Microcomputer (SCM) system with it by vehicle-mounted 24V Power convert.Embedded Control system
System needs a stable running voltage ability reliably working, and conventional power source custom uses linear voltage-stabilizing device
Doing voltage conversion, but this linear regulative mode has the biggest heat loss at work, work efficiency is only
It is 30%～50%, work under bad environment in addition, it is more easy to make the stability of embedded control system to be deteriorated.
Regulator part then works, during work or be big electric current stream in the way of fully on or shutoff
Crossing, or be completely switched off, therefore, the power consumption of switching power supply is extremely low, average operation efficiency up to
70%～90%.Wide input voltage range is to 5V～45V, and voltage is defeated via the pin 1 of LM2596 (U1)
Enter, according to the output voltage of the voltage-regulation pin 2 of feedback pin 4 so that it is stable in 5V ± 4% output.
Bulky capacitor the first electric capacity E1, the tenth electric capacity E10 are as energy-storage travelling wave tube, for the electricity stably inputting, exporting
Corrugating, the first filter inductance L1 that connects suppresses power supply High-frequency Interference, the first Schottky diode D1 to make
For fly-wheel diode, cooperate with L1, it is ensured that 5V stable DC voltage VCC exports.First current limliting
Resistance R1 connects the 6th light emitting diode D6, is used for indicating power supply the most working properly.
Power module of voltage regulation 16 gives GSM/GPRS network communication module 141 and GPS locating module 132
The partial circuit of power supply, as shown in the Fig. 4-2.GSM/GPRS network communication module 141 input voltage range
3.4～4.5V, and very sensitive to power supply stability, once produce slightly larger disturbance or interference on power supply, all may be used
Module can be caused to crash, and the current drain that module is when sending data is relatively big, particularly at some signals not
Good place, in order to search for network signal, the transmitting power of meeting automatic lifting oneself, this can be because of line impedance
Produce pressure drop make voltage instability, so at least to have the 4V power supply that more than 2A stabling current can be provided to
GSM/GPRS network communication module 141 is powered.Use series regulator mode, use big electric current special
With power supply chip MIC29302 (i.e. second source management monolithic integrated optical circuit), ensure GSM/GPRS
The stable power-supplying of network communication module 141 power supply.5V voltage VCC accesses MIC29302 (U2) chip
2,1 pin, the 3rd shunt capacitance C3 for filtering the AC influence of power input, MIC29302
Pin 3 ground connection of chip, pin 4 is 4V voltage VBAT outfan, it after the second resistance R2 with
Pin 5 is connected, pin 5 ground connection after the 3rd resistance R3 simultaneously.Second tantalum electric capacity E2 and the 7th electric capacity
C7 composes in parallel the filter circuit of 4V power output end, and bulky capacitor E2 specifically can be used to filter low frequency wave,
Small capacitances C7 filters high frequency waves.4V voltage VBAT exports 3.3V after the 7th diode D7 blood pressure lowering 0.7V
Voltage VCC3V3, for powering to GPS locating module 132.11st electrochemical capacitor E11 plays filter
Effect except out-put supply AC influence.
Temperature is the most basic ambient parameter of engineering mechanical device work, and temperature measurement module 133 is i.e. for measuring
This parameter.High accuracy, the one-line temperature sensor DS18B20 of high reliability can be used, have
The features such as circuit is simple, volume is little, easy for installation.Temperature measurement module 133 circuit is as it is shown in figure 5, pin 1
Connect power supply VCC and ground respectively with 3, the P32 accessing single-chip microcomputer after pin 2 pull-up resistor R29 in parallel draws
Foot.Temperature sensor DS18B20 is the highest to the requirement of sequential and electrical parameter, and single-chip microcomputer is through monobus
The workflow of interface accessing DS18B20 must comply with strict operation order: first, to DS18B20
Initialize, secondly, send ROM order, moreover, sending function order.Concrete, thermometric electricity
The thermometric flow process on road 133 as shown in Figure 6, comprises the following steps: S101, enters temperature display interface；S102
Initialize DS18B20；S103, a control command skip necessary ROM operation；S104, sending function
Order start-up temperature is changed；S105, time delay certain time, wait converts；S106, reinitialize
DS18B20；S107, a control command skip necessary ROM operation；S108, sending function order are read
Take the result of temperature transition；S109, further according to display precision require temperature transition result is converted into BCD
Show code form；S110 finally shows on liquid crystal display screen.
In order to improve availability and the friendly of system, the human-computer interaction module 15 of car-mounted terminal includes liquid
Crystal display screen, can be Nokia5110 (J3) and membrane keyboard (J4), for carrying out man-machine with operator
Alternately.Human-computer interaction module 15 has two-stage password display function, and domestic consumer can check that on-the-spot GPS is fixed
The status informations such as position, CAN, output state, temperature, the Administrator Level user of input password
Be also with GSM/GPRS network communication module 141 realize take phone, field modification DO output,
Check the functions such as control command, configuration vehicle module parameters that remote control center sends.Man-machine interaction
The circuit of module 15 is as shown in Figure 7.The pin 1 of LCDs Nokia5110 is through diode D8 blood pressure lowering
Be connected with VBAT afterwards, pin 2 ground connection, pin 38 respectively with single-chip microcomputer pin P00 P05
It is connected.The pin 18 of membrane keyboard is connected P20 P27 with single-chip microcomputer respectively.
The logic of man-machine interaction part is for persistently to detect whether to exist input information, when detecting input information
Time, enter the corresponding man-machine interaction display page according to the classification of input information.Concrete flow process such as Fig. 8 institute
Showing, program continually scans for whether keyboard has input, when keyboard has input, enters according to the difference of input information
Enter the different display pages, thus carry out different operations.When inputting 1, the CAN that display collects
Bus message；When inputting 2, the GPS that display collects positions information；When inputting 3, display is worked as
The state of front DO output；When inputting 4, display collects ambient temperature value；When input 5,6,7,8
Time, all will initially enter input cipher leaf, if input password is correct, then respectively enter call transceiver change
DO output state page, remotely send GSM/GPSM instruction check that page and car-mounted terminal arrange page.Vehicle-mounted
Terminal arrange page can respectively to block cipher, CAN heart beating send the cycle, by GPRS network to
The cycle of remote monitoring center transmission status information modifies, it is also possible to remove history short message.
GSM/GPRS network communication module 141 can be selected for three frequency band GSMs/GPRS chip SIM300, real
Existing car-mounted terminal and remote monitoring center are by the Internet service in wireless public network GSM/GPRS and short disappear
The communication of breath (SMS) business.It can EGSM 900MHz in the world, DCS 1800MHz,
Tri-kinds of operation at frequencies of PCS 1900MHz, using the teaching of the invention it is possible to provide GPRS multichannel type up to 10, and
Support tetra-kinds of GPRS encoding schemes of CS-1, CS-2, CS-3 and CS-4.GSM/GPRS network communication
Module 141 circuit is as shown in fig. 9-1.Reception data pin RXD of SIM300 chip, transmission data are drawn
Foot TXD is respectively through the 18th current-limiting resistance R18, the 18th current-limiting resistance R19 and wire jumper seat Jtx1, Jrx1
After receive data pin with the first of MCU single-chip microcomputer 11 the transmission data pin and first the most respectively and be connected (i.e.
MCU single-chip microcomputer 11 first serial pin 1TXD, 1RXD), be used for realizing MCU single-chip microcomputer 11 with
The data communication of SIM300 chip chamber.33rd pin (i.e. P06 pin) of MCU single-chip microcomputer 11
With switch pin (the i.e. PWRKEY pin) phase of SIM300 chip after the 17th current-limiting resistance R17
Even, software produce the low level of a period of time, SIM300 chip can be turned on and off.Network state is drawn
Foot (i.e. pin Network LED) after the 16th current-limiting resistance R16 with the 4th light emitting diode D4 phase
Even, the unlatching/closed mode of instruction SIM300 chip.Output test pin (i.e. pin VDD_EXT_3V)
Export test lead for SIM300 chip, when this pin output 3V voltage, illustrate that SIM300 chip is in
Normal operating conditions.Pin SIM_VDD, SIM_I/O, SIM_CLK, SIM_RST of SIM300 chip
For the pin with SIM communication, SIM supply voltage is by the controlled low pressure difference linearity of SIM300 chip internal
Manostat (LDO) provides, and can support the SIM of 1.8V and 3V, the circuit diagram of SIM such as Fig. 9-2
Shown in, SIM300 chip with the annexation of SIM card holder is: 1 foot of SIM card holder meets SIM_VCC,
2 feet are followed by SIM_RST through resistance R15, and 3 feet are followed by SIM_CLK through resistance R14,4 foot ground connection, and 5
Foot meets SIM_VCC, and 6 feet are followed by SIM_I/O through resistance R13, is the most also followed by through pull-up resistor R12
SIM_VCC.The positive pole pin MIC+ and negative pin MIC-of mike MIC are respectively through the second inductance
It is connected with MIC1P, MIC1N pin of SIM300 chip after L2, the 3rd inductance L3, MIC+ and MIC-
Tenth electric capacity C10 in parallel between pin, between MIC1P, MIC1N pin and the ground of SIM300 chip
Seal in the 11st electric capacity C11, the 12nd electric capacity C12 the most respectively.The audio signal circuit of mike belongs to little
Signal circuit system, is easily disturbed, so audio frequency anti-jamming circuit has very important effect.Audio frequency is done
Disturb and mainly have conduction type interference and radial pattern to disturb two classes.Electric capacity C10, inductance L2, L3 are used for suppressing to pass
Conductivity type is disturbed, and such as power supply Conduction Interference etc., electric capacity C11, C12 are to use shunt capacitance the method for bypass to suppress
Radial pattern disturbs.The 1 of microphone SPK, 2 pins respectively with the microphone outfan SPK1P of SIM300 chip,
SPK1N pin is connected.The antenna of SIM300 chip is through dedicated antenna seated connection head JGSM and GSM/GPRS
Miniature antenna connects.
The short message that GSM/GPRS network communication module 141 receives not is directly to send from sender
To recipient, and carry out forwarding by sms center all the time, say, that GSM short message is in fact
A kind of storage and forwarding service.The process that GSM/GPRS network communication module 141 information receives and processes can
Shown in Figure 10, comprise the following steps:
S201, GSM/GPRS network communication module 141 receives information；
S202 judges that the information that receives as GSM network note, then proceeds to S203, it is determined that the information received is
GPRS network information, then proceed to S210；
Short breath content is also read in S203, acquisition note position；
S204, judging whether the short breath content of described reading meets instruction format, if meeting, then proceeding to S205,
Otherwise, S206 is proceeded to；
S205, the instruction of execution correspondence also proceed to S207；
S206, the note of reply format error, and terminate flow process；
S207, judge that described instruction performs whether success, the most then proceed to S208, otherwise proceed to S209；
S208, reply successful note, and terminate flow process.
S209, the note that reply is failed, and terminate flow process.
S210, reading information content；
S211, judging whether the information content of described reading meets instruction format, if meeting, then proceeding to S212,
Otherwise, S213 is proceeded to；
S212, the instruction of execution correspondence also proceed to S214；
S213, the network information of reply format error, and terminate flow process；
S214, judge that described instruction performs whether success, the most then proceed to S215, otherwise proceed to S216；
S215, reply the successful network information, and terminate flow process.
S216, the network information that reply is failed, and terminate flow process.
In implementing, after GSM/GPRS network communication module 141 receives short message, can pass through
Serial ports one sends instruction "+CMTI: " SM ", 1 " to MCU single-chip microcomputer 11, and " 1 " therein represents note
There is first position of SIM, now MCU single-chip microcomputer 11 is to GSM/GPRS network communication module
141 send instruction " AT+CMGR=1 ", can read the content in note:
+CMGR:"REC UNREAD","+861393356545",,"11/06/23,13:08:21+32"
123
Wherein, REC UNREAD represents that note was not read, and+861393356545 is the other side number
Code, 11/06/23,13:08:21+32 is the transmission time, and 123 is short message content.
Parse the content of short message by this kind of method after, if content meets Surveillance center's instruction of agreement
During form, i.e. perform by instruction.
When MCU one-chip computer module receive that GSM/GPRS network communication module 141 sends with "+IPD "
During for the information of beginning, the Internet information arrival transmitted by GPRS network be described, now analyzes
The content of "+IPD " information afterwards, when Surveillance center's instruction format of satisfied agreement, then can be performed by instruction.
By input through keyboard and the instruction of GSM/GPRS network communication module 141 of human-computer interaction module 15
All can be modified DO output circuit state, the password of change car-mounted terminal, change CAN heart beating
Transmission cycle, change send cycle and the deletion institute of status information by GPRS network to remote monitoring center
There is the operation of note.The save location of change information is that the electric erazable programmable in MCU single-chip microcomputer 11 is read-only
Memorizer (EEPROM), 11 integrated EEPROM of MCU single-chip microcomputer are separate with the program space,
Can be used for preserving some and need the data that amendment and power down are not lost in application process.Pass through EEPROM
Storage data flow as shown in figure 11, comprises the following steps:
The data stored in S301, reading EEPROM are assigned to each parameter；
S302, judge whether each parameter value is changed.Concrete, it is judged that whether password is changed, and DO is the most more
Changing, whether CAN-T changes, and whether GPRS-changes, the most then proceed to S303, otherwise terminate flow process.
S303, again it is assigned to each parameter；
Data have been stored in S304, erasing EEPROM；
S305, again by present parameter read-in EEPROM.
DO output module 12 extends the output of four-way switch amount for car-mounted terminal.Utilize high-frequency small power NPN
Audion 9011 controls the output of switching value, and amplifies control electric current, is used for driving external display lamp or continuing
Electrical equipment.The circuit of DO output module 12 is as shown in figure 12.Wherein the work process of a road DO output is:
5th pin (i.e. P14 pin) of MCU single-chip microcomputer 11 is after the 30th pull-up resistor R30, through the 3rd
11 current-limiting resistance R31 connect the base stage of audion T2, and the emitter stage of audion T2 connects with ground, current collection
Pole is connected with 2 feet of 2 pole binding post K4, and 1 foot of K4 is after the 32nd current-limiting resistance R32
It is connected with vehicle-mounted+24V power supply.When P14 is output as positive voltage, open audion T2, the collection of audion
Electrode connects with emitter stage, makes the element being connected between terminal K4 bipod obtain electric work.
GPS locating module 132 can be selected for Korea S's GSTAR GS-89 chip, and it is a high-effect, low
The intelligent satellite reception module of power consumption, can use the GSC4f satellite designed by SiRF SiRF company of the U.S.
Position receiver chip, is a complete satellite-positioning receiver.The circuit diagram of GPS locating module 132 is such as
Shown in Figure 13.Second reception data pin of MCU single-chip microcomputer 11, second send data pin (i.e. the
Two serial ports, pin 2RXD, 2TXD) and pin transmission data pin TXA of GSTAR chip (U6),
Receive data pin RXA through the 21st current-limiting resistance R21, the 21st current-limiting resistance R20 and jumping
Connect after line seat Jrx2, Jtx2, to realize the communication between single-chip microcomputer and GSTAR GS-89 chip.MCU
32nd pin (i.e. P07 pin) of single-chip microcomputer 11 after the 23rd current-limiting resistance R23 with GSTAR
The pin (i.e. Reset pin) of restarting of chip is connected, and by MCU single-chip microcomputer 11 output low level, controls
GSTAR chip restarts, and then enters the satellite acquisition stage.Pin GPIO0 is through current-limiting resistance R22
It is connected with light emitting diode D2 afterwards, the unlatching/closed mode of instruction GSTAR chip.Pin V_RTC_3V3
Being followed by 3V button cell BATTERY through current-limiting resistance, button cell is for providing heat for GSTAR chip
Start the back-up source of function.The signal receiving antenna of GSTAR chip is connected to RN_IN pin.
V_ANT_IN pin is the power supply input pin activating antenna, needs to connect the voltage of 2.85V, and
VCC_RF_OUT pin can be to activate antenna function to provide the power supply of 2.85V, 30mA, so will
V_ANT_IN pin and VCC_RF_OUT pin link together, to realize activating antenna reception data
Function.V_ANT_IN pin and VCC_RF_OUT pin be connected after with to be connected two between ground in parallel electric
Hold E4 (the 4th electric capacity), C4 (the 5th electric capacity), for filtering interfering.
GPS locating module 132 issues the data form of MCU one-chip computer module:
$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11><CR><LF>
1) standard setting time (UTC time) form: every minute constantly. second second second (hhmmss.sss).
2) positioning states, A=data can use, and V=data are unavailable.
3) latitude, form: degree degree point. point point point point (ddmm.mmmm).
4) latitude is distinguished, the Northern Hemisphere (N) or the Southern Hemisphere (S).
5) longitude, form: degree degree point. point.
6) longitude is distinguished, east (E) hemisphere or west (W) hemisphere.
7) relative displacement, 0.0 to 1851.8knots
8) relative displacement direction, 000.0 to 359.9 degree, actual value.
9) date, form: the most every year (ddmmyy).
10) magnetic pole variable, 000.0 to 180.0.
11) number of degrees.
12) Checksum (inspection position).
MCU single-chip microcomputer 11 receives, by second serial, the information that GPS locating module 132 is sent, and
Parse location data flow process as shown in 14 figures, comprise the following steps:
S401, the data emptied in GPS caching；
S402, judge whether to receive GPS information, the most then proceed to S403, otherwise continue waiting for receiving
Gps data；
S403, judge that information is whether complete, the most then proceed to S404；Otherwise, S402 is returned；
S404, by this information store；
S405, to storage information resolve, the GPS global positioning information parsed；
If S406 to show, then it is shown on liquid crystal display screen, if to send to remote monitoring center, then
Sent by GSM or GPRS network.
CAN communication module 131 is by the main CAN phase of car-mounted terminal with engineering mechanical device
Even, for obtaining data relevant with equipment running status in CAN.CAN communication module 131
Three parts are isolated including bus control unit, bus transceiver and high speed photo coupling.Bus control unit can be with
MCP2515 chip is main, and circuit diagram is as shown in Figure 15-1, and coordinates external circuit to constitute.MCU single-chip microcomputer
The CAN_C pin of 11 is as the chip selection signal of bus control unit MCP2515 (U7).Pin CAN_INT
The input port that bus data interrupts is received as single-chip microcomputer.Pin CAN_SI, CAN_SO and CAN_SCK
Arranged by scm software and work in the spi mode, as single-chip microcomputer and MCP2515 communication address/
Data and SPI clock cable.Bus transceiver can be based on TJA1050 chip, circuit diagram such as figure
Shown in 15-2, and external circuit is coordinated to constitute.CANH and the CANL pin of TJA1050 (U8) and ground
Between two 30pF electric capacity (C5, C6) connecting, for filtering the High-frequency Interference in CAN,
Two diodes (D9, D10) being connected between CANH and CANL pin and ground, send out at bus voltage
Shield during raw transition interference.High speed photo coupling isolated part can employ high speed photo coupling chip 6N137,
Circuit diagram is as shown in Figure 15-3 or shown in 15-4, and coordinates external circuit to constitute.Two 6N137 (U9, U10)
The receipts of single-chip microcomputer with bus transceiver are electrically isolated completely to signalling, the power supply of optocoupler two terminal circuit also
And keep apart, the power supply of MCU one-chip computer module is provided by power module of voltage regulation, CAN communication mould
The power supply of block 131 is provided by power isolation module B0505S (U11) of self band, B0505S (U11)
Circuit diagram as shown in Figure 15-5, this can strengthen the anti-lightning ability of vehicle-mounted CAN bus communication circuit.
The form of CAN transmitting data can be divided into ID and DATA two parts.ID part is divided into again:
Standard frame and extension frame, it differs primarily in that ID length is different, and standard frame is 11 ID, extends frame
It is 29 ID.DATA partial-length is variable, the shortest 1 byte, the longest 8 bytes.For preventing data from overflowing
Going out, ID part need to use 4 bytes (32) variable save, DATA part need to use 8 bytes (64
Position) variable save, so the variable save of each frame CAN market demand 4+8=12 byte length.At list
In sheet machine program, use a line is variable, be classified as 12 byte lengths two-dimensional array preserve all of CAN total
Line data.The renewal of CAN data and the process of preservation as shown in figure 16, comprise the following steps:
S501, judge whether to receive CAN message, the most then proceed to S502, otherwise continue waiting for receiving
CAN message.
S502, first the frame CAN data received are stored in CAN data preserve array a line,
Judge the ID part of the next CAN data received, if the ID preserved, this frame number is described
According to preserving, then proceed to S503, otherwise proceed to S504.
S503, the DATA part of the data preserved with this ID in the past is updated to the DATA that receives
Part, and jump to S507.
S504, judgement are ID standard frame, then proceed to S505, are that ID extends frame, then proceed to S506.
S505, needs newly-built a line after CAN data preserve array, and these frame data are stored in
This row.Varying in size according to single-chip microcomputer RAM, the array line length that can build is different, and this car-mounted terminal is most
100 frame CAN data can be preserved.Newly-built 11 ID and DATA of 12 byte variable save, and jump to
S507。
S506, needs newly-built a line after CAN data preserve array, and these frame data are stored in
This row.Varying in size according to single-chip microcomputer RAM, the array line length that can build is different, and this car-mounted terminal is most
100 frame CAN data can be preserved.Newly-built 29 ID and DATA of 12 byte variable save.
S507, judgement are to be shown by liquid crystal display screen, or are sent by GSM/GPRS, and perform accordingly.
The car-mounted terminal of the embodiment of the present invention has used modularity, integrated design to think when software design
Think, utilize the various interrupt resources of MCU single-chip microcomputer 11 to solve man-machine interaction, GSM/GPRS radio remote
Journey communication, the problem gathering the multi-task parallels such as GPS location information, CAN communication, heart beating instruction.
Car-mounted terminal overall control flow as shown in figure 17, comprises the following steps:
S601, read the currently stored data of car-mounted terminal and to the various parameter assignment of each module.
S602, system initialization, specifically initialize liquid crystal display screen, GPS, GSM/GPRS, CAN,
Temperature.
S603, initialize the interruption that each module is corresponding, concrete initialize that serial ports interrupts 1, serial ports interrupts 2,
External interrupt 1, timer interruption 0.
S604, mastery routine continually scan for keyboard action, update the display of liquid crystal display screen according to input through keyboard.This reality
Execute configuration serial ports interruption 1 in example to be responsible for when there being GSM/GPRS information to arrive receiving and processing being monitored
The control instruction at center；Serial ports interrupts 2 to be responsible for when there being GPS information to arrive receiving and parsing through out location number
According to；Trigger external interrupt 1 to read when CAN communication module 131 receives data and preserve；Open
Open intervalometer 0 and change heart beating LED status on time, and send heart beating letter in the stipulated time to CAN
Breath, sends equipment current state to Surveillance center by GPRS network.The importance interrupted according to each,
Each interruption is set to level Four preferred form, and a low priority interrupt being carrying out can be by high priority
Disconnected interrupted, but can not be interrupted by another low priority interrupt, go to terminate always, return main journey
New interruption application could be responded after sequence.In the present embodiment interrupt class from high to low put in order for: outside
Interrupting 1, serial ports interrupts 1, and serial ports interrupts 2, timer interruption 0.According to priority joined by this kind of multiple interrupt
Close the mode run, efficiently solve the problem that multitask is the most parallel.
The break period of MCU single-chip microcomputer 11 timer interruption 0 can be set by the value of depositor TH0, TL0
Putting, in the present embodiment, car-mounted terminal is set to 0.02 second interrupt once, counts in interrupt routine, note
Several numbers are multiplied by interruption duration and are elapsed time.MCU single-chip microcomputer 1 controls program and uses the side of numeration
Method changes the state of status indicator lamp, transmission CAN heartbeat message, transmission GPRS device in the stipulated time
Status information.This stipulated time can be arranged and be saved in EEPROM.Timer interruption 0 is held
The program of row as shown in figure 18, is often entered and is once circulated, and count variable+1, and the elapsed time is when reaching display lamp
When state changes the time, change LED status；When reaching the time sending CAN heart beating, to
CAN sends heartbeat message；When reaching the GPRS transmission time, send to remote monitoring center and set
Standby running state information.
The control method of a kind of car-mounted terminal that the embodiment of the present invention provides, shown in Figure 19, including under
Row step:
S701, read the currently stored data of car-mounted terminal assignment, make car-mounted terminal initialize.
The interruption that in S702, initialization car-mounted terminal, each categorical data is corresponding.Each function interrupted includes:
Serial ports interrupts 1 and is used for receiving radio network information and processing；Serial ports interrupts 2 and is used for receiving GPS information also
Parse location data；External interrupt 1 is used for receiving CAN data；Timer interruption 0 is used for changing the heart
Jump LED status；Heartbeat message is sent to CAN；And sent out to external equipment by wireless network
Give this car-mounted terminal current state.Wherein the execution step of timer interruption 0 specifically includes: timer interruption
0 according to default duration cycle interruption, and often enters and once circulate, then numeration variable adds one；Numeration variable
When the corresponding time reaches the LED status change time, then change LED status；Reach to send CAN
During time of bus heart beating, then send heartbeat message to CAN；When reaching netting twine network information transfer
Between time, then send this car-mounted terminal current state by wireless network to external equipment.
S703, priority orders according to each interruption, complete the transmitting-receiving of each categorical data in car-mounted terminal.
More specifically the control method example of car-mounted terminal, shown in Figure 20, comprises the following steps:
S801, read the currently stored data of car-mounted terminal and to the various parameter assignment of each module.
S802, system initialization, specifically initialize liquid crystal display screen, GPS, GSM/GPRS, CAN,
Temperature.
S803, initialize the interruption that each module is corresponding, concrete initialize that serial ports interrupts 1, serial ports interrupts 2,
External interrupt 1, timer interruption 0.
S804, mastery routine continually scan for keyboard action, update the display of liquid crystal display screen according to input through keyboard.This reality
Execute configuration serial ports interruption 1 in example to be responsible for when there being GSM/GPRS information to arrive receiving and processing being monitored
The control instruction at center；Serial ports interrupts 2 to be responsible for when there being GPS information to arrive receiving and parsing through out location number
According to；Trigger external interrupt 1 when data is received to read and preserve；Opening timing device 0 changes heart beating on time
LED status, and send heartbeat message in the stipulated time to CAN, pass through GPRS to Surveillance center
Network sends equipment current state.The importance interrupted according to each, is set to the preferential shape of level Four by each interruption
Formula, a low priority interrupt being carrying out can be interrupted by high-priority interrupt, but can not be by another
Low priority interrupt is interrupted, and goes to terminate always, could respond new interruption application after returning mastery routine.
In the present embodiment interrupt class from high to low put in order as external interrupt 1, serial ports interrupts 1, in serial ports
Disconnected 2, timer interruption 0.By the way of this kind of multiple interrupt according to priority coordinates operation, efficiently solve
The problem that multitask is the most parallel.
The break period of timer interruption 0 can be arranged by the value of depositor TH0, TL0, in the present embodiment
Car-mounted terminal is set to 0.02 second interrupt once, counts in interrupt routine, and numeration number is multiplied by interruption
Duration is elapsed time.Use the method state at stipulated time change status indicator lamp of numeration, send out
Send CAN heartbeat message, send GPRS device status information.This stipulated time is can to arrange and be saved in
In EEPROM.Timer interruption 0 often enters and once circulates, and count variable+1, and the elapsed time is when reach
When LED status changes the time, change LED status；When reaching to send the time of CAN heart beating
Time, send heartbeat message to CAN；When reaching the GPRS transmission time, to remote monitoring center
Send equipment running status information.
To sum up, the present invention can not meet being actually needed of product based on prior art and design, and has function complete
Face, reliability is high, capacity of resisting disturbance strong, the feature of friendly interface.Use high speed, low-power consumption, superpower resist
A new generation 8051 single-chip microcomputer STC12C5A60S2 of interference, as master controller, has two-way AccessPort
And communication function, hardware possesses the transmitting-receiving communication of high speed photo coupling isolated can bus, stable maximum output
The electric current power module up to 3A, measure environment thermal module, be made up of 4 × 4 membrane keyboards and liquid crystal display screen
Human-computer interaction module, by microcontroller serial port one communication connect GSM/GPRS network communication module,
The 4 road DO output modules controlling function, the GPS location connected by microcontroller serial port two communication can be realized
Module and the CAN communication module with anti-lightning ability,；Modularity, integrated has been used on software
Design philosophy, utilize the various interrupt resources of single-chip microcomputer, efficiently solve man-machine interaction, GSM/GPRS
The multi-task parallels such as wireless telecommunication, collection GPS location information, CAN communication, heart beating instruction
Problem.The vehicle module human-computer interaction function friendly interface of the present invention, can carry out two-stage cipher inquiry, general
The status informations such as on-the-spot GPS location, CAN, output switch parameter, temperature can be checked in general family, defeated
The Administrator Level user entering password also can realize taking phone, field modification output switch parameter, checking remotely
The functions such as control command that control centre sends, configuration vehicle module parameters.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (3)
1. the control method of a car-mounted terminal, it is characterised in that comprise the following steps:
G1, read the currently stored data of car-mounted terminal assignment, make car-mounted terminal initialize；
The interruption that in G2, initialization car-mounted terminal, each categorical data is corresponding；
G3, priority orders according to each interruption, complete the transmitting-receiving of each categorical data in car-mounted terminal.
2. the control method of car-mounted terminal as claimed in claim 1, it is characterised in that described each interruption
Function includes:
Serial ports interrupts 1 and is used for receiving radio network information and processing；
Serial ports interrupts 2 and is used for receiving GPS information and parsing location data；
External interrupt 1 is used for receiving CAN data；
Timer interruption 0 is used for changing heart beating LED status；Heartbeat message is sent to CAN；With
And send this car-mounted terminal current state by wireless network to external equipment.
3. the control method of car-mounted terminal as claimed in claim 2, it is characterised in that in described intervalometer
The execution step of disconnected 0 includes:
Timer interruption 0 is according to default duration cycle interruption, and often enters and once circulate, then count variable
Add one；
When the numeration time corresponding to variable reaches the LED status change time, then change LED status；
When reaching the time sending CAN heart beating, then send heartbeat message to CAN；Reach netting twine net
During the network information transmission time, then send this car-mounted terminal current state by wireless network to external equipment.
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| CN201610149207.4A CN105843089A (en) | 2011-08-17 | 2011-08-17 | Method of controlling vehicle terminal |
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| CN201610149207.4A CN105843089A (en) | 2011-08-17 | 2011-08-17 | Method of controlling vehicle terminal |
| CN201110235580.9A CN102955438B (en) | 2011-08-17 | 2011-08-17 | Vehicular terminal of engineering machinery remote monitoring system |
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| CN111145539A (en) * | 2019-12-12 | 2020-05-12 | 南京理工大学 | Traffic information data acquisition system and method based on ARM processor |
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| CN103345172A (en) * | 2013-06-24 | 2013-10-09 | 上海华兴数字科技有限公司 | Controlling system of wireless controller and pump truck |
| WO2015194652A1 (en) * | 2014-06-19 | 2015-12-23 | 日立オートモティブシステムズ株式会社 | Vehicle-mounted program writing device |
| CN104219281B (en) * | 2014-07-30 | 2019-03-19 | 浙江吉利控股集团有限公司 | CAN bus based vehicle personalization function configuration method and configuration system |
| CN104730999A (en) * | 2015-03-27 | 2015-06-24 | 广西田园生化股份有限公司 | Agricultural equipment operating controlling method and system |
| CN106888141A (en) * | 2017-02-28 | 2017-06-23 | 北京艾利特科技有限公司 | A kind of efficient CAN communication means |
| CN107656520B (en) * | 2017-10-24 | 2021-04-02 | 厦门市福工动力技术有限公司 | CAN bus data analysis method and computer readable storage medium |
| CN108426604A (en) * | 2018-02-07 | 2018-08-21 | 深圳市恒晨电器有限公司 | A kind of automatization test system and method for car-mounted terminal |
| CN108803420A (en) * | 2018-06-02 | 2018-11-13 | 新乡市光明电器有限公司 | Military mobile unit collection control circuit |
| CN109612519A (en) * | 2018-07-30 | 2019-04-12 | 中铁七局集团西安铁路工程有限公司 | One kind being based on 4G network cloud server machinery monitoring device |
| CN111858186B (en) * | 2020-09-22 | 2020-12-08 | 蘑菇车联信息科技有限公司 | Vehicle-mounted terminal system monitoring method and system, electronic equipment and readable storage medium |
| CN112162944B (en) * | 2020-10-15 | 2022-07-15 | 珠海格力电器股份有限公司 | Serial communication control method, processor, serial communication system and storage medium |
| CN112600940A (en) * | 2020-12-31 | 2021-04-02 | 上海宏英智能科技股份有限公司 | Remote control system and method based on OTA |
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| CN102955438B (en) | 2017-04-26 |
| CN102955438A (en) | 2013-03-06 |
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Application publication date: 20160810 |