CN202222007U - Vehicle-loaded terminal of engineering mechanical remote monitoring system - Google Patents
Vehicle-loaded terminal of engineering mechanical remote monitoring system Download PDFInfo
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- CN202222007U CN202222007U CN201120298733XU CN201120298733U CN202222007U CN 202222007 U CN202222007 U CN 202222007U CN 201120298733X U CN201120298733X U CN 201120298733XU CN 201120298733 U CN201120298733 U CN 201120298733U CN 202222007 U CN202222007 U CN 202222007U
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Abstract
The utility model discloses a vehicle-loaded terminal of an engineering mechanical remote monitoring system, relates to the field of engineering machinery, and aims to solve a problem that actual needs can not be met by a conventional vehicle-loaded terminal of an engineering mechanical remote monitoring system. The vehicle-loaded terminal comprises an MCU single-chip microcomputer, a DO output module, an information collection module and a wireless network communication module, wherein the DO output module and the information collection module are respectively connected with the MCU single-chip microcomputer. The DO output module, the information collection module and the wireless network communication module are controlled by the MCU single-chip microcomputer. The DO output module is used for outputting instructions sent by the MCU single-chip microcomputer. The information collection module is used for collection of the engineering mechanical information of the terminal, and the data that are collected are processed by the MCU single-chip microcomputer. The wireless network communication module is used for communication between the MCU single-chip microcomputer and external equipment via a wireless network. The vehicle-loaded terminal of an engineering mechanical remote monitoring system enables actual needs of an engineering mechanical remote monitoring system to be satisfied.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of car-mounted terminal of engineering machinery remote monitering system.
Background technology
Along with the development of microelectric technique, control technology, network communications technology, GPS (global positioning system Global Positioning System) technology and GIS (GIS-Geographic Information System Geographic Information Systems) technology, engineering machinery remote monitering system arises.Different according to the emphasis of using; Engineering machinery remote monitering system mainly is made up of Surveillance center and car-mounted terminal two parts; Can realize status monitoring, failure diagnosis to long-range unit; Realization group of planes construction dispatching, decision-making and most optimum distribution of resources, the after-sale service level of raising sale enterprise is strengthened leasing mechanical management of back monthly payment plan and control etc.
But the car-mounted terminal of the disclosed engineering machinery remote monitering system of prior art can not satisfy actual needs.
The utility model content
The utility model provides a kind of car-mounted terminal of engineering machinery remote monitering system, can not satisfy the problem of actual needs in order to the car-mounted terminal that solves the disclosed engineering machinery remote monitering system of prior art.
The car-mounted terminal of the engineering machinery remote monitering system of the utility model comprises: the MCU single-chip microcomputer; The DO output module, the information acquisition module that link to each other with the MCU single-chip microcomputer respectively, and wireless network communication module; Wherein, MCU Single-chip Controlling DO output module, information acquisition module, and the work of wireless network communication module; The instruction output that the DO output module sends the MCU single-chip microcomputer; Information acquisition module is gathered the information of the affiliated engineering machinery in this terminal, and by the MCU single-chip microcomputer data that collect is handled; The wireless network communication module is accomplished the communication between MCU single-chip microcomputer and the external equipment through wireless network.
Further, information acquisition module comprises one of following modules at least: the CAN bus communication module, and it is connected on the CAN bus of said engineering mechanical device, is used to receive the data of communication on the CAN bus, and carries out exchanges data with the MCU single-chip microcomputer; The GPS locating module, it gathers gps data, and by the MCU single-chip microcomputer data that collect is carried out the gps data protocol analysis; Temperature measurement module, its measures ambient temperature, and by the MCU single-chip microcomputer temperature data of measuring is handled.
Further, the terminal also comprises: the human-computer interaction module that links to each other with the MCU single-chip microcomputer with information acquisition module; Human-computer interaction module is used for the information that the display message acquisition module is gathered, and transmits control command to the MCU single-chip microcomputer.The terminal also comprises: power module of voltage regulation is used to the voltage that provides stable.
Further, the wireless network communication module comprises: GSM network communication module and GPRS network communication module.
Above-mentioned power module of voltage regulation comprises: the first power management monolithic integrated circuit, and this circuit comprises first pin at least, second pin and the 4th pin; Voltage is via first pin input of the first power management monolithic integrated circuit; Export by second pin after the step-down; The 4th pin is gathered the output voltage values of second pin and is fed back to the first power management monolithic integrated circuit; The first management monolithic integrated circuit is adjusted the output voltage of second pin according to the said magnitude of voltage of feedback, makes its stable output.Power module of voltage regulation also comprises: first electric capacity and the tenth electric capacity are used for the voltage waveform of stable input, output as energy-storage travelling wave tube; Wherein, the positive pole of first electric capacity connects first pin of the first power management monolithic integrated circuit; The positive pole of the tenth electric capacity connects second pin of the first power management monolithic integrated circuit and the 4th pin of the first power management monolithic integrated circuit through first filter inductance; The tenth capacitances in series first filter inductance and first Schottky diode; First Schottky diode is used for the electric current afterflow, and cooperatively interacts with first filter inductance, exports with burning voltage.Power module of voltage regulation also comprises: whether first current-limiting resistance and the 6th light-emitting diode with the tenth capacitances in series are used to indicate power supply in proper working order.And power module of voltage regulation also can comprise: second source management monolithic integrated circuit, and this circuit comprises first pin at least, second pin, the 4th pin and the 5th pin; Voltage is from second pin and the input of first pin of second source management monolithic integrated circuit, and from the 4th pin and the output of the 5th pin, and the 4th pin and the 5th pin one side be connected with filter circuit, is used for filtering and disturbs after the transformation; 5V voltage inserts second pin and first pin of second source management monolithic integrated circuit, and the 3rd shunt capacitance links to each other with first pin with second pin, is used to filter the interchange interference of power input; 4V voltage is exported from the 4th pin after second source management monolithic integrated circuit transformation, and the 4th pin links to each other with the 5th pin behind the second resistance resistance, and the 5th pin ground connection behind the 3rd resistance; The second tantalum electric capacity and the 7th electric capacity compose in parallel the filter circuit of 4V power output end, and this filter circuit is connected between the 4th pin and the 5th pin; The 4V voltage of the 4th pin output is exported 3.3V voltage after the 7th diode step-down; The 11 electrochemical capacitor is connected between the 7th diode and the 5th pin, is used to filter the interchange interference of output.
The reception data pin of above-mentioned wireless network communication module is sent data pin with first of MCU single-chip microcomputer and is linked to each other behind the 18 current-limiting resistance and wire jumper seat; And the transmission data pin of wireless network communication module receives data pin with first of MCU single-chip microcomputer and links to each other the data communication between completion wireless network communication module and the MCU single-chip microcomputer behind the 19 current-limiting resistance and wire jumper seat.The 33 pin of MCU single-chip microcomputer links to each other with the switch pin of wireless network communication module behind the 17 current-limiting resistance, through producing the low level of preset duration, open and close wireless network communication module.The network state pin of wireless network communication module links to each other with the 4th light-emitting diode behind the 16 current-limiting resistance, is used to indicate the on off state of wireless network communication module.When the output test pin output voltage of wireless network communication module is 3V voltage, judge that the wireless network communication module is in normal operating conditions.The anodal pin of microphone and negative pole pin are connected with the relevant microphone pin of said wireless network communication module through behind second inductance and the 3rd inductance respectively; Parallel connection the tenth electric capacity between the anodal pin of microphone and the negative pole pin is used to suppress conduction type and disturbs; Seal in the 11 electric capacity and the 12 electric capacity respectively between the relevant microphone pin of wireless network communication module and the ground, be used to suppress radial pattern and disturb.
Comprise in the above-mentioned MCU single-chip microcomputer: EEPROM is used for being kept at the data that application process is revised and power down is not lost.
The reception data pin of above-mentioned GPS locating module is sent data pin with second of MCU single-chip microcomputer and is linked to each other behind the 20 current-limiting resistance and wire jumper seat; And the transmission data pin of GPS locating module receives data pin with second of MCU single-chip microcomputer and links to each other the data communication between completion GPS locating module and the MCU single-chip microcomputer behind the 21 current-limiting resistance and wire jumper seat.The 32 pin of MCU single-chip microcomputer links to each other with the pin of restarting of GPS locating module behind the 23 current-limiting resistance, restarts through the low level control GPS locating module that produces, and carries out satellite acquisition.Be connected in series the capacitance group that is formed in parallel by the 4th electric capacity and the 5th electric capacity between the voltage output end of GPS locating module and the ground, be used for filtering interfering.
Above-mentioned CAN bus communication module adopts the complete electrical isolation of high speed photo coupling; The power supply of optocoupler two terminal circuits is isolated in the lump.The CAN bus communication module comprises at least: power isolation module, bus transceiver and high speed photo coupling are isolated; Wherein, high speed photo coupling is isolated receipts and the signalling electrical isolation with MCU single-chip microcomputer and bus transceiver, and the power supply of optocoupler two terminal circuits is isolated in the lump; The power supply of CAN bus communication module provides through said power isolation module.
Above-mentioned DO output module comprises the output of four-way switch amount at least; Wherein each way switch amount output all through triode control and amplification Control current, is used to drive outward element.In the described switching value output in arbitrary road; By the 5th pin of MCU single-chip microcomputer behind the 30 pull-up resistor; Connect the base stage of said triode through the 31 current-limiting resistance; The emitter of triode joins with ground, and collector electrode is connected with second pin of two utmost point binding posts, and first pin of two utmost point binding posts links to each other with vehicle power after through the 32 current-limiting resistance; When the 5th pin of MCU single-chip microcomputer is output as positive voltage, open triode, the collector electrode of triode is communicated with emitter, makes the components and parts that are connected between two utmost point binding post two pins get the electrician and does.
The car-mounted terminal of the engineering machinery remote monitering system of the utility model can satisfy the actual needs of engineering machinery remote monitering system.
Description of drawings
Fig. 1 is the car-mounted terminal structural representation of the engineering machinery remote monitering system among the utility model embodiment;
Fig. 2 is the car-mounted terminal structural representation of preferred engineering machinery remote monitering system among the utility model embodiment;
Fig. 3-1 is MCU single-chip microcomputer 11 circuit diagrams among the utility model embodiment;
Fig. 3-2 is the circuit diagram of the serial ports level transferring chip MAX3232 among the utility model embodiment;
Fig. 4-1 is that the power module of voltage regulation 16 among the utility model embodiment is given the circuit diagram of MCU single-chip microcomputer 11 power supplies;
Fig. 4-2 is that the power module of voltage regulation 16 among the utility model embodiment is given the circuit diagram of GSM/GPRS network communication module 141 with 132 power supplies of GPS locating module;
Fig. 5 is temperature measurement module 133 circuit diagrams among the utility model embodiment;
Fig. 6 is the thermometric flow chart among the utility model embodiment;
Fig. 7 is the circuit diagram of the human-computer interaction module 15 among the utility model embodiment;
Fig. 8 is the man-machine interaction logic diagram among the utility model embodiment;
Fig. 9-1 is the circuit diagram of the GSM/GPRS network communication module 141 among the utility model embodiment;
Fig. 9-2 is the circuit diagram of the SIM among the utility model embodiment;
Figure 10 is the flow chart that the GSM/GPRS message pick-up among the utility model embodiment is also handled;
Figure 11 passes through EEPROM memorying data flow journey figure among the utility model embodiment;
Figure 12 is the circuit diagram of the DO output module 12 among the utility model embodiment;
Figure 13 is the circuit diagram of the GPS locating module 132 among the utility model embodiment;
Figure 14 receives GPS information for MCU single-chip microcomputer among the utility model embodiment and parses the flow chart of locator data;
Figure 15-1 is the circuit diagram of the bus control unit MCP2515 chip among the utility model embodiment;
Figure 15-2 is the circuit diagram of the bus transceiver TJA1050 chip among the utility model embodiment;
Figure 15-3 is a kind of circuit diagram of the high speed photo coupling isolating chip 6N137 among the utility model embodiment;
Figure 15-4 is the another kind of circuit diagram of the high speed photo coupling isolating chip 6N137 among the utility model embodiment;
Figure 15-5 is the circuit diagram of the power isolation module B0505S of the CAN bus communication module 131 among the utility model embodiment;
Figure 16 is the flow chart that the CAN bus data among the utility model embodiment upgrades and preserves;
Figure 17 is the overall control flow chart of the car-mounted terminal among the utility model embodiment;
Figure 18 is that the timer among the utility model embodiment interrupts 0 flowchart.
Embodiment
Discover through the inventor, on the prior art hardware or do not have CAN (the Controller Area NetWork of controller local 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 the software or because teleinstruction can not multi-task parallel appears confiscating or human-computer interaction interface is friendly inadequately, or at every turn changed information can not preserve etc.All can not satisfy the needs of engineering machinery remote monitering.
Therefore; The purpose of the utility model is to provide a kind of structural principle and workflow of car-mounted terminal of engineering machinery remote monitering system; Can be installed on each engineering machinery construction equipment; Gather information such as target device current GPS location, CAN bus communication, ambient temperature of living in real time, be shown on the liquid crystal display screen, the field personnel can be switched the different pages through membrane keyboard and checked.Simultaneously; Car-mounted terminal is through Internet service and SMS (Short Messaging Service) and Surveillance center's communication among wireless public network GSM (global system for mobile communications Global System of Mobile communication)/GPRS (general packet radio service technology General Packet Radio Service); The information uploading that collection is aggregated into is to Surveillance center; And reception Surveillance center instruction; According to the output of commands for controlling DO circuit, or the change configuration, the Long-distance Control and the maintenance function of realization equipment.And then technical problems such as the existing car-mounted terminal information gathering of solution, data processing, man-machine interaction, telecommunication and versatility.
Referring to shown in Figure 1, the car-mounted terminal of the engineering machinery remote monitering system among the utility model embodiment comprises: MCU (Micro Control Unit micro-control unit) single-chip microcomputer 11; The DO output module 12 that links to each other with MCU single-chip microcomputer 11 respectively, information acquisition module 13, and wireless network communication module 14.Wherein, MCU single-chip microcomputer 11 is controlled DO output module 12, information acquisition module 13, and the work of wireless network communication module 14; The instruction output that DO output module 14 sends MCU single-chip microcomputer 11; Information acquisition module 13 is gathered the information of the affiliated engineering machinery in this terminal, and is handled by 11 pairs of data that collect of MCU single-chip microcomputer; Wireless network communication module 14 is accomplished the communication between MCU single-chip microcomputer 11 and the external equipment (as: Surveillance center) through wireless network.
Module among further refinement Fig. 1, referring to shown in Figure 2, the car-mounted terminal of the engineering machinery remote monitering system among the utility model embodiment comprises: MCU single-chip microcomputer 11, DO output module 12;
Human-computer interaction module 15 is used for the information that display message acquisition module 13 is gathered, and transmits control command to MCU single-chip microcomputer 11.
Power module of voltage regulation 16 is used to the voltage that provides stable.
Wireless network communication module 14 can be a GSM/GPRS network communication module 141.
Below above-mentioned each module is further detailed.
MCU single-chip microcomputer 11 is cores of whole car-mounted terminal, is responsible for coordinating the work of each intermodule, and adopting high speed, low-power consumption, superpower jamproof 8051 single-chip microcomputer STC12C5A60S2 of new generation is that core constitutes.11 circuit connections of MCU single-chip microcomputer are shown in Fig. 3-1.Single-chip microcomputer working station indicator D5 links to each other with MCU single-chip microcomputer 11 first pins through current-limiting resistance R25; By the periodic output low level of program control MCU single-chip microcomputer 11 these pins; Thereby control D5 constantly glimmers, and single-chip microcomputer operation in boundary's does not normally get into endless loop outside the announcement.11 second pins of MCU single-chip microcomputer link to each other with the base stage of triode T1 through current-limiting resistance R26, ground connection behind the collector electrode series connection alarm buzzer BEEP1 of T1, and the emitter of T1 links to each other with power supply VCC.When system makes a mistake, single-chip microcomputer second pin will be exported high level, open triode T1, and the collector and emitter conducting of triode T1 makes alarm buzzer BEEP1 sounding alarm, remind the field personnel to note.The RST pin of MCU single-chip microcomputer 11 meets power supply VCC after connecing the negative pole of electrochemical capacitor E3; And ground connection behind the current-limiting resistance R27; Be used to monitor single-chip microcomputer supply power voltage VCC, when VCC was lower than the detection threshold voltage of electrify restoration circuit, all logical circuits all can reset; When VCC recovers normal voltage again, postpone some clocks after, electrification reset finishes.The circuit diagram of serial ports level transferring chip MAX3232 utilizes two rs 232 serial interface signal and the serial ports of computers TTL Signal Matching of serial ports level transferring chip MAX3232 with single-chip microcomputer shown in Fig. 3-2, make things convenient for the computer debugging of system.Microcontroller serial port one 10,11 pins link to each other with 9,10 pins with 12,11 pins of MAX3232 chip respectively with serial ports 23,4 pins; The MAX3232 chip guarantees that 14,13 pins and 7,8 pins keep the level communication of RS-232 under the 120kbps data rate under the cooperation of the outside small size charge pump electric capacity E6 of four 0.1 μ F, E7, E8, E9.
It is that 5V gives the MCU single-chip microcomputer 11 power supplies that power module of voltage regulation 16 is used for vehicle-mounted 24V power source conversion; Convert 5V single-chip microcomputer power supply into 4V and give GSM/GPRS network communication module 141 power supplies, convert 141 power supplies of 4VGSM/GPRS network communication module into 3.3V and give the GPS locating module 132 power supplies.
Power module of voltage regulation 16 is given the partial circuit of MCU single-chip microcomputer 11 power supplies, shown in Fig. 4-1.The LM2596 regulator is voltage-dropping type power management monolithic integrated circuit (i.e. the first power management monolithic integrated circuit), can export the drive current of 3A, has good linearity and load regulation characteristic simultaneously.Use it to give the power supply of MCU SCM system as the 5V power supply with vehicle-mounted 24V power source conversion.Embedded control system needs a stable operating voltage ability reliably working; The conventional power source custom adopts linear voltage-stabilizing device to do voltage transitions; But this linear regulative mode has very big thermal loss at work; Operating efficiency is merely 30%～50%, and work under bad environment in addition more is prone to make the stability variation of embedded control system.The regulator part is then worked with the mode of complete conducting or shutoff, during work or be that big electric current flows through, or is to end fully, and therefore, the power consumption of switching power supply is extremely low, and average operating efficiency can reach 70%～90%.Wide input voltage range is to 5V～45V, and voltage is via pin 1 input of LM2596 (U1), and the output voltage according to the voltage-regulation pin 2 of feedback pin 4 makes it be stabilized in 5V ± 4% output.The big electric capacity first electric capacity E1, the tenth electric capacity E10 are as energy-storage travelling wave tube; Be used for the voltage waveform of stable input, output, the first filter inductance L1 that connects suppresses the power supply High-frequency Interference, and the first Schottky diode D1 is as fly-wheel diode; Cooperatively interact with L1, guarantee 5V stable DC voltage VCC output.Whether the first current-limiting resistance R1 the 6th light-emitting diode D6 that connects is used to indicate power supply in proper working order.
Power module of voltage regulation 16 is given the partial circuit of GSM/GPRS network communication module 141 with 132 power supplies of GPS locating module, shown in Fig. 4-2.GSM/GPRS network communication module 141 input voltage ranges 3.4～4.5V; And very responsive to power supply stability, in case produce big slightly disturbance or interference on the power supply, all possibly cause module to crash; And the current drain of module when sending data is bigger; Particularly,, can promote the transmitting power of oneself automatically for the search network signal in the place of some poor signals; This can make voltage instability because of line impedance produces pressure drop, can provide the 4V of the above stabling current of 2A power supply to 141 power supplies of GSM/GPRS network communication module so will have at least.Adopt the series regulator mode, use big electric current power source special chip MIC29302 (being second source management monolithic integrated circuit), guarantee the stable power-supplying of GSM/GPRS network communication module 141 power supplys.5V voltage VCC inserts 2,1 pin of MIC29302 (U2) chip; The 3rd shunt capacitance C3 is used for the interchange of filter out power input to be disturbed; MIC29302 pin of chip 3 ground connection; Pin 4 is a 4V voltage VBAT output, and it links to each other with pin 5 after second resistance R 2, simultaneously pin 5 ground connection after the 3rd resistance R 3.The second tantalum electric capacity E2 and the 7th capacitor C 7 compose in parallel the filter circuit of 4V power output end, specifically can adopt big electric capacity E2 filters low ripple, little capacitor C 7 filtering high frequency waves.4V voltage VBAT exports 3.3V voltage VCC3V3 behind the 7th diode D7 step-down 0.7V, be used for to 132 power supplies of GPS locating module.The 11 electrochemical capacitor E11 plays the filtering out-put supply and exchanges the effect of disturbing.
Temperature is the most basic environmental parameter of engineering mechanical device work, and temperature measurement module 133 promptly is used to measure this parameter.Can use the one-line temperature sensor DS18B20 of high accuracy, high reliability, have characteristics such as circuit is simple, volume is little, easy for installation.Temperature measurement module 133 circuit are as shown in Figure 5, and pin 1 and 3 connects power supply VCC and ground respectively, insert the P32 pin of single-chip microcomputer behind the pin 2 parallelly connected pull-up resistor R29.Temperature sensor DS18B20 is very high to the requirement of sequential and electrical parameter, and single-chip microcomputer must be observed strict operating sequence through the workflow of single bus interface visit DS18B20: at first, DS18B20 is carried out initialization; Secondly; Send the ROM order, moreover, the sending function order.Concrete, the thermometric flow process of temperature measurement circuit 133 is as shown in Figure 6, comprises the following steps: S101, gets into the temperature display interface; S102 initialization DS18B20; S103, a control command are skipped necessary ROM operation; S104, the conversion of sending function order start-up temperature; S105, time-delay certain hour, wait converts; S106, DS18B20 reinitializes; S107, a control command are skipped necessary ROM operation; The result of temperature transition is read in S108, sending function order; S109, require that according to display precision the temperature transition result is converted into BCD again and show a sign indicating number form; S110 shows on liquid crystal display screen at last.
For availability and the friendly that improves system, the human-computer interaction module 15 of car-mounted terminal has comprised LCDs, can be Nokia5110 (J3) and membrane keyboard (J4), is used for carrying out man-machine interaction with the operator.Human-computer interaction module 15 has two-stage password Presentation Function; State informations such as on-the-spot GPS location, CAN bus, output variable state, temperature can be checked by domestic consumer, and Administrator Level user's GSM/GPRS network communication also capable of using module 141 of input password realizes connecing and makes a phone call, field modification DO output, check control command that remote control center sends, dispose function such as vehicle-mounted module parameters.The circuit of human-computer interaction module 15 is as shown in Figure 7.The pin 1 of LCDs Nokia5110 links to each other with VBAT after diode D8 step-down, pin 2 ground connection, and P05's pin 3---8 respectively with single-chip microcomputer pin P00---links to each other.P27's pin 1 of membrane keyboard---8 respectively with single-chip microcomputer P20---links to each other.
Whether the logic of man-machine interaction part exists input information for continuing detection, when detecting input information, gets into the man-machine interaction display page of correspondence according to the classification of input information.Concrete flow process is as shown in Figure 8, and whether the continuous keyboard scan of program has input, when keyboard has input, according to the different display page of difference entering of input information, thereby carries out different operation.When importing 1, show the CAN bus message that collects; When importing 2, show the GPS locating information that collects; When importing 3, show the state of current DO output; When importing 4, show to collect ambient temperature value; When input 5,6,7,8 time, all will at first get into the input cipher leaf, if the input password is correct, then get into call transceiver change DO output state page or leaf respectively, the long-range GSM/GPSM of sending instruction checks that page or leaf and car-mounted terminal are provided with page or leaf.Car-mounted terminal is provided with page or leaf and can sends the cycle, make amendment to the cycle of remote monitoring center send state information through GPRS network module password, the heartbeat of CAN bus respectively, can also remove historical short message.
GSM/GPRS network communication module 141 can be selected three frequency band GSMs/GPRS chip SIM300 for use, realizes that car-mounted terminal and remote monitoring center are through service of the Internet among the wireless public network GSM/GPRS and the professional communication of short message (SMS).It can be worked under three kinds of frequencies of EGSM 900MHz, DCS 1800MHz, PCS 1900MHz in the world, nearly 10 of GPRS multichannel types can be provided, and support CS-1, CS-2, CS-3 and four kinds of GPRS encoding schemes of CS-4.GSM/GPRS network communication module 141 circuit are shown in Fig. 9-1.The reception data pin RXD of SIM300 chip, transmission data pin TXD behind the 18 current-limiting resistance R18, the 18 current-limiting resistance R19 and wire jumper seat Jtx1, Jrx1, send data pin with first of MCU single-chip microcomputer 11 respectively more respectively and the first reception data pin links to each other (being MCU single-chip microcomputer 11 first serial pin 1TXD, 1RXD), is used to realize the data communication of MCU single-chip microcomputer 11 and SIM300 chip chamber.The 33 pin of MCU single-chip microcomputer 11 (being the P06 pin) links to each other with the switch pin (being the PWRKEY pin) of SIM300 chip behind the 17 current-limiting resistance R17, produces the low level of a period of time by software, can open or close the SIM300 chip.Network state pin (being pin Network LED) links to each other with the 4th light-emitting diode D4 behind the 16 current-limiting resistance R16, the On/Off state of indication SIM300 chip.Output test pin (being pin VDD_EXT_3V) is SIM300 chip output test lead, when this pin output 3V voltage, explains that the SIM300 chip is in normal operating conditions.SIM300 pin of chip SIM_VDD, SIM_I/O, SIM_CLK, SIM_RST are and the pin of SIM communication that the SIM supply voltage is provided by the controlled low pressure difference linear voltage regulator of SIM300 chip internal (LDO), can support the SIM of 1.8V and 3V; The circuit diagram of SIM is shown in Fig. 9-2; The annexation of SIM300 chip and SIM seat is: 1 pin of SIM seat meets SIM_VCC, and 2 pin meet SIM_RST after resistance R 15, and 3 pin meet SIM_CLK after resistance R 14; 4 pin ground connection; 5 pin meet SIM_VCC, and 6 pin meet SIM_I/O after resistance R 13, also behind pull-up resistor R12, meet SIM_VCC simultaneously.The anodal pin MIC+ of microphone MIC and negative pole pin MIC-are connected with MIC1P, the MIC1N pin of SIM300 chip through second inductance L 2, the 3rd inductance L 3 backs respectively; Parallelly connected the tenth capacitor C 10 also seals in the 11 capacitor C the 11, the 12 capacitor C 12 respectively between MIC+ and the MIC-pin between the MIC1P of SIM300 chip, MIC1N pin and the ground.The audio signal circuit of microphone belongs to the small signal circuit system, is subject to disturb, so the audio frequency anti-jamming circuit has important effect.Audio disturbances mainly contains the conduction type interference and radial pattern disturbs two types.Capacitor C 10, inductance L 2, L3 are used to suppress conduction type to be disturbed, and like the power supply conducted interference etc., capacitor C 11, C12 adopt shunt capacitance the method for bypass to suppress radial pattern to disturb.1,2 pins of microphone SPK link to each other with microphone output SPK1P, the SPK1N pin of SIM300 chip respectively.The antenna of SIM300 chip is connected with the GSM/GPRS miniature antenna through dedicated antenna seated connection head JGSM.
The short message that GSM/GPRS network communication module 141 receives not is directly to send to the recipient from the sender, and transmits through sms center all the time, that is to say that the GSM short message is a kind of storage in fact and transmits service.GSM/GPRS network communication module 141 message pick-ups and the process of handling can comprise the following steps: referring to shown in Figure 10
S201, GSM/GPRS network communication module 141 are received information;
S202 judges that the information of receiving is the GSM network and short message, then changes S203 over to, judges that the information of receiving is GPRS network information, then changes S210 over to;
S203, obtain the note position and read short breath content;
S204, judge whether the said short breath content that reads meets command format, if meet, then changes S205 over to, otherwise, change S206 over to;
The instruction of S205, execution correspondence also changes S207 over to;
The note of S206, answer format error, and process ends;
S207, judge that said instruction carries out whether success, if then change S208 over to, otherwise change S209 over to;
S208, the note that answer is successful, and process ends.
The note of S209, answer failure, and process ends.
S210, read the information content;
S211, judge whether the said information content that reads meets command format,, then change S212 over to if meet, otherwise, change S213 over to;
The instruction of S212, execution correspondence also changes S214 over to;
The network information of S213, answer format error, and process ends;
S214, judge that said instruction carries out whether success, if then change S215 over to, otherwise change S216 over to;
S215, the network information that answer is successful, and process ends.
The network information of S216, answer failure, and process ends.
In concrete the realization; After GSM/GPRS network communication module 141 is received short message; Can send instruction "+CMTI: " SM ", 1 " to MCU single-chip microcomputer 11 through serial ports one, there is first position of SIM in " 1 " expression note wherein; This moment, MCU single-chip microcomputer 11 sent instruction " AT+CMGR=1 " to GSM/GPRS network communication module 141, can read the content in the note:
+CMGR:″REC?UNREAD″，″+861393356545″，，″11/06/23，13:08:21+32″
123
Wherein, REC UNREAD representes that note was not read, the+861393356545th, and the other side's number, 11/06/23,13:08:21+32 is a transmitting time, the 123rd, short message content.
Parse the content of short message by this kind method after,, promptly carry out by instruction if when content satisfies the Surveillance center command format of agreement.
When the MCU one-chip computer module receive that GSM/GPRS network communication module 141 sends be the information of beginning with "+IPD " time; Explain that the Internet information that transmits through GPRS network arrives; Analyze the content of "+IPD " back information this moment; When satisfying the Surveillance center command format of agreement, then can carry out by instruction.
The keyboard input through human-computer interaction module 15 and the instruction of GSM/GPRS network communication module 141 all can be changed password, the heartbeat of change CAN bus of DO output circuit state, change car-mounted terminal and send the cycle, change through GPRS network to cycle of remote monitoring center send state information with delete the operation of all notes.The preservation position of changed information is the EEPROM (EEPROM) in the MCU single-chip microcomputer 11; 11 integrated EEPROM of MCU single-chip microcomputer separate with the program space, can be used for preserving the data that some need be revised in application process and power down is not lost.Shown in figure 11 through EEPROM memorying data flow journey, comprise the following steps:
S301, read the data assignment of having stored in the EEPROM and give each parameter;
S302, judge whether each parameter value is changed.Concrete, judge whether password is changed, and whether DO changes, and whether CAN-T changes, and whether GPRS-changes, if, then change S303 over to, otherwise process ends.
S303, assignment is given each parameter again;
S304, wipe and stored data in the EEPROM;
S305, again present parameter is write among the EEPROM.
GPS locating module 132 can be selected Korea S GSTAR GS-89 chip for use; It is the intelligent satellite receiver module of a high-effect, low power consumption; The GSC4f satellite fix receiving chip that can adopt U.S. SiRF SiRF company to be designed is a complete satellite fix receiver.The circuit diagram of GPS locating module 132 is shown in figure 13.Second of MCU single-chip microcomputer 11 receives data pin, the second transmission data pin (is a second serial; Pin 2RXD, 2TXD) send data pin TXA with the pin of GSTAR chip (U6), receive data pin RXA and be connected after through the 21 current-limiting resistance R21, the 21 current-limiting resistance R20 and wire jumper seat Jrx2, Jtx2, to realize the communication between single-chip microcomputer and the GSTAR GS-89 chip.The 32 pin of MCU single-chip microcomputer 11 (being the P07 pin) links to each other with the pin (being the Reset pin) of restarting of GSTAR chip behind the 23 current-limiting resistance R23; By MCU single-chip microcomputer 11 output low levels; Control GSTAR chip restarts, and then gets into the satellite acquisition stage.Pin GPIO0 links to each other with light-emitting diode D2 behind current-limiting resistance R22, the On/Off state of indication GSTAR chip.Pin V_RTC_3V3 meets 3V button cell BATTERY behind current-limiting resistance, button cell is used to the back-up source that the GSTAR chip provides the warm start function.The signal receiving antenna of GSTAR chip is connected to the RN_IN pin.The V_ANT_IN pin is the power supply input pin that activates antenna; Need connect the voltage of 2.85V; And the VCC_RF_OUT pin can be the power supply that the activation antenna function provides 2.85V, 30mA; So V_ANT_IN pin and VCC_RF_OUT pin are linked together, to realize activating the function that antenna receives data.Be connected two shunt capacitance E4 (the 4th electric capacity), C4 (the 5th electric capacity) after V_ANT_IN pin and VCC_RF_OUT pin link to each other with between the ground, be used for filtering interfering.
The data format that GPS locating module 132 is issued the MCU one-chip computer module is:
$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, the A=data can be used, and the V=data are unavailable.
3) latitude, form: the degree degree divides. divides (ddmm.mmmm).
4) latitude is distinguished, the Northern Hemisphere (N) or the Southern Hemisphere (S).
5) longitude, form: the degree degree divides. divides.
6) longitude is distinguished, east (E) hemisphere or west (W) hemisphere.
7) relative displacement speed, 0.0 to 1851.8knots
8) relative displacement direction, 000.0 to 359.9 degree, actual value.
9) date, form: everyday (ddmmyy) month in and month out every year.
10) magnetic pole variable, 000.0 to 180.0.
11) number of degrees.
12) Checksum (inspection position).
MCU single-chip microcomputer 11 receives the information that GPS locating module 132 is sent through second serial, and the flow process that parses locator data comprises the following steps: shown in 14 figure
S401, empty the data in the GPS buffer memory;
S402, judge whether to receive GPS information, if then change S403 over to, otherwise continue to wait for and receive gps data;
S403, judge whether information is complete, if then change S404 over to; Otherwise, return S402;
S404, with this information stores;
S405, canned data is resolved the GPS global positioning information that parses;
S406, then sends through GSM or GPRS network if send to remote monitoring center if demonstration then is shown on the liquid crystal display screen.
CAN bus communication module 131 links to each other car-mounted terminal with the main CAN bus of engineering mechanical device, be used to obtain data relevant with equipment running status on the CAN bus.CAN bus communication module 131 comprises that bus control unit, bus transceiver and high speed photo coupling isolate three parts.Bus control unit can be main with the MCP2515 chip, and circuit diagram is shown in Figure 15-1, and the cooperation external circuit constitutes.The CAN_C pin of MCU single-chip microcomputer 11 is as the chip selection signal of bus control unit MCP2515 (U7).Pin CAN_INT receives the input port that bus data interrupts as single-chip microcomputer.Pin CAN_SI, CAN_SO and CAN_SCK are arranged under the SPI pattern through scm software and work, as the address/data and the SPI clock cable of single-chip microcomputer and MCP2515 communication.Bus transceiver can be main with the TJA1050 chip, and circuit diagram is shown in Figure 15-2, and the cooperation external circuit constitutes.Two the 30pF electric capacity (C5, C6) that are connected between the CANH of TJA1050 (U8) and CANL pin and the ground; Be used to filter the High-frequency Interference on the CAN bus; Two diodes (D9, D10) that are connected between CANH and CANL pin and the ground shield when bus voltage generation transition is disturbed.The high speed photo coupling isolated part can use high speed photo coupling chip 6N137, and circuit diagram is shown in Figure 15-3 or shown in the 15-4, and the cooperation external circuit constitutes.Two 6N137 (U9, U10) are with the receipts and the complete electrical isolation of signaling of single-chip microcomputer and bus transceiver; The power supply of optocoupler two terminal circuits is also kept apart in the lump; The power supply of MCU one-chip computer module provides through power module of voltage regulation; The power supply of CAN bus communication module 131 provides through the power isolation module B0505S (U11) of self band, and the circuit diagram of B0505S (U11) is shown in Figure 15-5, and this can strengthen the anti-thunderbolt ability of vehicle-mounted CAN bus communication circuit.
The form of CAN bus transmitting data can be divided into ID and DATA two parts.The ID part is divided into again: standard frame and expansion frame, its main distinction are that ID length is different, and standard frame is 11 ID, and the expansion frame is 29 ID.The DATA partial-length is variable, the shortest 1 byte, the longest 8 bytes.For preventing that data from overflowing, ID partly need use 4 bytes (32) variable to preserve, and DATA partly need use 8 bytes (64) variable to preserve, and preserves so each frame CAN data is used the variable of 4+8=12 byte length.In SCM program, adopt delegation's two-dimensional array variable, that classify 12 byte lengths as to preserve all CAN bus datas.Renewal of CAN bus data and preservation process are shown in figure 16, comprise the following steps:
S501, judge whether to receive CAN information, if then change S502 over to, otherwise continue to wait for the CAN information that receives.
S502, frame CAN data that will receive earlier are stored in the delegation that the CAN bus data is preserved array, judge the ID part of the next CAN data that receive, if the ID that preserved, explain that these frame data preserved, and then change S503 over to, otherwise change S504 over to.
The DATA partial update of S503, the data of will be in the past preserving with this ID is the DATA part that receives, and jumps to S507.
S504, judgement are the ID standard frame, then change S505 over to, are ID expansion frames, then change S506 over to.
S505, need be after the CAN bus data be preserved array newly-built delegation, and these frame data are stored in this row.RAM varies in size according to single-chip microcomputer, and the array line length that can build is different, and this car-mounted terminal can be preserved 100 frame CAN data at most.Newly-built 12 byte variablees are preserved 11 ID and DATA, and jump to S507.
S506, need be after the CAN bus data be preserved array newly-built delegation, and these frame data are stored in this row.RAM varies in size according to single-chip microcomputer, and the array line length that can build is different, and this car-mounted terminal can be preserved 100 frame CAN data at most.Newly-built 12 byte variablees are preserved 29 ID and DATA.
S507, judgement are to show through liquid crystal display screen, still send through GSM/GPRS, and corresponding execution.
The car-mounted terminal of the utility model embodiment has used modularization, integrated design philosophy when software design, the problem of utilizing the various interrupt resources of MCU single-chip microcomputer 11 to solve man-machine interactions, GSM/GPRS wireless remote communication, gather multi-task parallels such as GPS locating information, CAN bus communication, heartbeat indication.The overall control flow of car-mounted terminal is shown in figure 17, comprises the following steps:
S601, read the data of the current storage of car-mounted terminal and give the various parameter assignment of each module.
S602, system initialization, concrete initialization liquid crystal display screen, GPS, GSM/GPRS, CAN bus, temperature.
S603, the corresponding interruption of each module of initialization, specifically initialization serial ports interruption 1, serial ports interruption 2, external interrupt 1, timer interrupt 0.
S604, the continuous keyboard scan action of main program, the demonstration of liquid crystal display screen is upgraded in input according to keyboard.Configuration serial ports interruption 1 is responsible for when having GSM/GPRS information to arrive, receiving and handling the control command that obtains Surveillance center in the present embodiment; Serial ports interrupts 2 is responsible for when having GPS information to arrive, receiving and parsing locator data; When CAN bus communication module 131 receives data, triggering external interrupt 1 reads and preserves; Opening timing device 0 changes the heartbeat led status on time, and sends heartbeat message to the CAN bus at the appointed time, passes through GPRS network transmitting apparatus current state to Surveillance center.Importance according to each interruption; Each interruption is set to the level Four preferred form, and a low priority interrupt of carrying out can be interrupted by high-priority interrupt, but can not be interrupted by another low priority interrupt; Implement end always, could respond new interruption application after returning main program.Interrupt class putting in order from high to low is external interrupt 1 in the present embodiment, and serial ports interrupts 1, and serial ports interrupts 2, and timer interrupts 0.According to priority cooperate the mode of operation through this kind multiple interrupt, solved the parallel simultaneously problem of multitask effectively.
MCU single-chip microcomputer 11 timers interrupt 0 the value setting that can pass through register TH0, TL0 break period, and car-mounted terminal is set to interruption in 0.02 second once in the present embodiment, in interrupt routine, count, and the numeration number multiply by the interruption duration and is elapsed time.MCU single-chip microcomputer 1 control program uses the method for numeration to change state, transmission CAN heartbeat message, the transmission GPRS status information of equipment of status indicator lamp at the appointed time.This stipulated time can be provided with and be kept among the EEPROM.The program of carrying out in the timer interruption 0 is shown in figure 18, whenever advances once circulation, numeration variable+ 1, and the elapsed time is when reaching the led status change during time, the change led status; When reaching the time of sending the heartbeat of CAN bus, send heartbeat message to the CAN bus; When reaching GPRS during the transmission time, to remote monitoring center transmitting apparatus running state information.
To sum up, the utility model can not satisfy the actual needs of product based on prior art and design, and has that complete function, reliability are high, antijamming capability is strong, the characteristics of friendly interface.Adopt high speed, low-power consumption, superpower jamproof 8051 single-chip microcomputer STC12C5A60S2 of new generation as master controller; Have two-way AccessPort and communication function; Possesses high speed photo coupling isolated can bus transmitting-receiving communication on the hardware; The human-computer interaction module that stable maximum output current can reach the power module, measures ambient temperature module of 3A, be made up of 4 * 4 membrane keyboards and liquid crystal display screen, the GSM/GPRS network communication module that is connected through microcontroller serial port one communication, 4 road DO output modules that can realize controlled function, the GPS locating module that connects through microcontroller serial port two communications and CAN bus communication module with anti-thunderbolt ability; Modularization, integrated design philosophy have been used on the software; Utilize the various interrupt resources of single-chip microcomputer, solved the problem of multi-task parallels such as man-machine interaction, the communication of GSM/GPRS wireless remote, collection GPS locating information, CAN bus communication, heartbeat indication effectively.The vehicle-mounted module human-computer interaction function friendly interface of the utility model; Can carry out the two-stage cipher inquiry; State informations such as on-the-spot GPS location, CAN bus, switching value output, temperature can be checked by domestic consumer, and the Administrator Level user of input password also can realize connecing and make a phone call, field modification switching value output, check functions such as control command that remote control center sends, the vehicle-mounted module parameters of configuration.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
Claims (22)
1. the car-mounted terminal of an engineering machinery remote monitering system is characterized in that, comprising: the MCU single-chip microcomputer; The DO output module, the information acquisition module that link to each other with the MCU single-chip microcomputer respectively, and wireless network communication module;
Wherein, MCU Single-chip Controlling DO output module, information acquisition module, and the work of wireless network communication module;
The instruction output that the DO output module sends the MCU single-chip microcomputer;
Information acquisition module is gathered the information of the affiliated engineering machinery in this terminal, and by the MCU single-chip microcomputer data that collect is handled;
The wireless network communication module is accomplished the communication between MCU single-chip microcomputer and the external equipment through wireless network.
2. car-mounted terminal as claimed in claim 1 is characterized in that, said information acquisition module comprises one of following modules at least:
The CAN bus communication module, it is connected on the CAN bus of said engineering mechanical device, is used to receive the data of communication on the CAN bus, and carries out exchanges data with the MCU single-chip microcomputer;
The GPS locating module, it gathers gps data, and by the MCU single-chip microcomputer data that collect is carried out the gps data protocol analysis;
Temperature measurement module, its measures ambient temperature, and by the MCU single-chip microcomputer temperature data of measuring is handled.
3. car-mounted terminal as claimed in claim 1 is characterized in that, said terminal also comprises: the human-computer interaction module that links to each other with the MCU single-chip microcomputer with information acquisition module;
Human-computer interaction module is used for the information that the display message acquisition module is gathered, and transmits control command to the MCU single-chip microcomputer.
4. car-mounted terminal as claimed in claim 1 is characterized in that, said terminal also comprises: power module of voltage regulation is used to the voltage that provides stable.
5. car-mounted terminal as claimed in claim 1 is characterized in that, said wireless network communication module comprises: GSM network communication module and GPRS network communication module.
6. car-mounted terminal as claimed in claim 4 is characterized in that, said power module of voltage regulation comprises: the first power management monolithic integrated circuit, and this circuit comprises first pin at least, second pin and the 4th pin;
Voltage is via first pin input of the first power management monolithic integrated circuit; Export by second pin after the step-down; The 4th pin is gathered the output voltage values of second pin and is fed back to the first power management monolithic integrated circuit; The first management monolithic integrated circuit is adjusted the output voltage of second pin according to the said magnitude of voltage of feedback, makes its stable output.
7. car-mounted terminal as claimed in claim 6 is characterized in that, said power module of voltage regulation also comprises: first electric capacity and the tenth electric capacity are used for the voltage waveform of stable input, output as energy-storage travelling wave tube;
Wherein, the positive pole of first electric capacity connects first pin of the first power management monolithic integrated circuit;
The positive pole of the tenth electric capacity connects second pin of the first power management monolithic integrated circuit and the 4th pin of the first power management monolithic integrated circuit through first filter inductance;
The tenth capacitances in series first filter inductance and first Schottky diode; First Schottky diode is used for the electric current afterflow, and cooperatively interacts with first filter inductance, exports with burning voltage.
8. car-mounted terminal as claimed in claim 7 is characterized in that, said power module of voltage regulation also comprises: whether first current-limiting resistance and the 6th light-emitting diode with the tenth capacitances in series are used to indicate power supply in proper working order.
9. car-mounted terminal as claimed in claim 4 is characterized in that, said power module of voltage regulation comprises: second source management monolithic integrated circuit, and this circuit comprises first pin at least, second pin, the 4th pin and the 5th pin;
Voltage is from second pin and the input of first pin of second source management monolithic integrated circuit, and from the 4th pin and the output of the 5th pin, and the 4th pin and the 5th pin one side be connected with filter circuit, is used for filtering and disturbs after the transformation.
10. car-mounted terminal as claimed in claim 9; It is characterized in that; 5V voltage inserts second pin and first pin of second source management monolithic integrated circuit, and the 3rd shunt capacitance links to each other with first pin with second pin, is used to filter the interchange interference of power input; 4V voltage is exported from the 4th pin after second source management monolithic integrated circuit transformation, and the 4th pin links to each other with the 5th pin behind the second resistance resistance, and the 5th pin ground connection behind the 3rd resistance; The second tantalum electric capacity and the 7th electric capacity compose in parallel the filter circuit of 4V power output end, and this filter circuit is connected between the 4th pin and the 5th pin; The 4V voltage of the 4th pin output is exported 3.3V voltage after the 7th diode step-down; The 11 electrochemical capacitor is connected between the 7th diode and the 5th pin, is used to filter the interchange interference of output.
11. like claim 1 or 5 described car-mounted terminals; It is characterized in that; The reception data pin of said wireless network communication module is sent data pin with first of MCU single-chip microcomputer and is linked to each other behind the 18 current-limiting resistance and wire jumper seat; And the transmission data pin of wireless network communication module receives data pin with first of MCU single-chip microcomputer and links to each other the data communication between completion wireless network communication module and the MCU single-chip microcomputer behind the 19 current-limiting resistance and wire jumper seat.
12. like claim 1 or 5 described car-mounted terminals; It is characterized in that; The 33 pin of said MCU single-chip microcomputer links to each other with the switch pin of wireless network communication module behind the 17 current-limiting resistance, through producing the low level of preset duration, open and close wireless network communication module.
13., it is characterized in that the network state pin of said wireless network communication module links to each other with the 4th light-emitting diode, is used to indicate the on off state of wireless network communication module like claim 1 or 5 described car-mounted terminals behind the 16 current-limiting resistance.
14. like claim 1 or 5 described car-mounted terminals; It is characterized in that; The anodal pin of microphone and negative pole pin are connected with the relevant microphone pin of said wireless network communication module through behind second inductance and the 3rd inductance respectively; Parallel connection the tenth electric capacity between the anodal pin of microphone and the negative pole pin is used to suppress conduction type and disturbs; Seal in the 11 electric capacity and the 12 electric capacity respectively between the relevant microphone pin of wireless network communication module and the ground, be used to suppress radial pattern and disturb.
15. car-mounted terminal as claimed in claim 1 is characterized in that, comprises in the said MCU single-chip microcomputer: EEPROM is used for being kept at the data that application process is revised and power down is not lost.
16. car-mounted terminal as claimed in claim 2; It is characterized in that; The reception data pin of said GPS locating module is sent data pin with second of MCU single-chip microcomputer and is linked to each other behind the 20 current-limiting resistance and wire jumper seat; And the transmission data pin of GPS locating module receives data pin with second of MCU single-chip microcomputer and links to each other the data communication between completion GPS locating module and the MCU single-chip microcomputer behind the 21 current-limiting resistance and wire jumper seat.
17. car-mounted terminal as claimed in claim 2; It is characterized in that; The 32 pin of said MCU single-chip microcomputer links to each other with the pin of restarting of GPS locating module behind the 23 current-limiting resistance, restarts through the low level control GPS locating module that produces, and carries out satellite acquisition.
18. car-mounted terminal as claimed in claim 2 is characterized in that, is connected in series the capacitance group that is formed in parallel by the 4th electric capacity and the 5th electric capacity between the voltage output end of said GPS locating module and the ground, is used for filtering interfering.
19. car-mounted terminal as claimed in claim 2 is characterized in that, said CAN bus communication module adopts the complete electrical isolation of high speed photo coupling; The power supply of optocoupler two terminal circuits is isolated in the lump.
20. car-mounted terminal as claimed in claim 19 is characterized in that, said CAN bus communication module comprises at least: power isolation module, bus transceiver and high speed photo coupling are isolated;
Wherein, high speed photo coupling is isolated receipts and the signalling electrical isolation with MCU single-chip microcomputer and bus transceiver, and the power supply of optocoupler two terminal circuits is isolated in the lump; The power supply of CAN bus communication module provides through said power isolation module.
21. car-mounted terminal as claimed in claim 1 is characterized in that, said DO output module comprises the output of four-way switch amount at least; Wherein each way switch amount output all through triode control and amplification Control current, is used to drive outward element.
22. car-mounted terminal as claimed in claim 21; It is characterized in that, in the output of the described switching value in arbitrary road, by the 5th pin of MCU single-chip microcomputer behind the 30 pull-up resistor; Connect the base stage of said triode through the 31 current-limiting resistance; The emitter of triode joins with ground, and collector electrode is connected with second pin of two utmost point binding posts, and first pin of two utmost point binding posts links to each other with vehicle power after through the 32 current-limiting resistance; When the 5th pin of MCU single-chip microcomputer is output as positive voltage, open triode, the collector electrode of triode is communicated with emitter, makes the components and parts that are connected between two utmost point binding post two pins get the electrician and does.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120298733XU CN202222007U (en) | 2011-08-17 | 2011-08-17 | Vehicle-loaded terminal of engineering mechanical remote monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120298733XU CN202222007U (en) | 2011-08-17 | 2011-08-17 | Vehicle-loaded terminal of engineering mechanical remote monitoring system |
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| CN102955438A (en) * | 2011-08-17 | 2013-03-06 | 秦皇岛天业通联重工股份有限公司 | Vehicular terminal of engineering machinery remote monitoring system and control method |
| CN102968102A (en) * | 2012-11-09 | 2013-03-13 | 中国地质大学（武汉） | Remote monitoring device of trenchless drilling machine |
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| CN102968102A (en) * | 2012-11-09 | 2013-03-13 | 中国地质大学（武汉） | Remote monitoring device of trenchless drilling machine |
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| 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 |
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| CN109889392B (en) * | 2019-03-14 | 2022-02-22 | 国网江苏省电力有限公司镇江供电分公司 | Method for quickly generating repair work order of information network terminal equipment |
| CN112910951A (en) * | 2021-01-13 | 2021-06-04 | 中山大学 | Loader running state monitoring system based on OBD-II technology |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160518 Address after: 066004 No. 3 Tianshan Road, Qinhuangdao economic and Technological Development Zone, Hebei, China Patentee after: QINHUANGDAO TIANYE TOLIAN HEAVY INDUSTRY CO., LTD. Address before: 066004 No. 3 Tianshan Road, Qinhuangdao economic and Technological Development Zone, Hebei, China Patentee before: Qinhuangdao Tianye Tolian Heavy Industry Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120516 |