CN100498369C - Vehicle-mounted satellite positioning communication terminal with multiple data acquisition modes for engineering machinery - Google Patents
Vehicle-mounted satellite positioning communication terminal with multiple data acquisition modes for engineering machinery Download PDFInfo
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- CN100498369C CN100498369C CNB2006100383377A CN200610038337A CN100498369C CN 100498369 C CN100498369 C CN 100498369C CN B2006100383377 A CNB2006100383377 A CN B2006100383377A CN 200610038337 A CN200610038337 A CN 200610038337A CN 100498369 C CN100498369 C CN 100498369C
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Abstract
Disclosed is a vehicle carried engineering machinery satellite positioning communication terminal which takes a microcontroller (5) as center, wherein, the data collection CAN bus interface (1), RS-232 bus interface (2), input output interface of switching value and analog value (3) and in the microcontroller (5) peripheral circuit, power module (4), watch dog and resetting circuit (6), real-time clock (7), statistic memory (8), GPS module (9), GSM module (10) are respectively connected with the microcontroller (5), the SIM card (11) is connected with the GSM module (10).
Description
Technical field:
The present invention relates to a kind of engineering machinery supervising device, belong to electromechanical equipment electronic monitoring technical field.
Background technology
In engineering construction, often need monitor the work of the engineering mechanical device in the construction.Traditional supervising device can only be shown to the driver to monitoring result, and the monitored results of each equipment all isolates, and this makes the manufacturer not have gained some understanding to the operating position and the distribution situation of its most of product.Need a kind of terminal, can give host computer so that to its management and monitoring the work information and the geographic coordinate information uploading of engineering machinery, and these data are put in the database.The distribution and the operating position of its product can better be understood according to these information by enterprise, so that effectively formulate sale, maintenance plan.Secondly, the cost of engineering machinery is generally than higher, and major part is to be used in the engineering construction occasion, and environment for use is more abominable, so require than higher for the importance of safety in production.Can monitor in real time and manage engineering machinery, be very important so that accomplish its maintenance in time and safeguard to guarantee to keep the safety in production.In addition, the new technology of modern industry combined with conventional industries comply with engineering machinery intelligent, this world development trend of a group of planesization, transform traditional product with new and high technology, in conjunction with the both at home and abroad products characteristics and the market demand, exploitation has independent intellectual property right, advanced, reliable, practical, at home and abroad competitive on the market, can guide the industry development direction, the construction machinery product of intelligent a, group of planesization, thereby promote the development of national industry, improve international competitiveness.Present many businessmans release the vehicle-mounted mobile communication terminal of band satellite positioning functions, as are applied in taxi, bus, police car etc., but the task that this terminal is undertaken is fewer, can not satisfy a large amount of status information needs of large-scale engineering machinery transmission.
Summary of the invention:
Technical matters: the present invention is exactly the vehicle-mounted engineering machinery satellite positioning communication terminal with several data acquisition mode that designs for the special requirement that adapts to engineering machinery, its perfect in shape and function, with low cost, take different data acquisition interface modes at different engineering mechanical devices and obtain the work state information of engineering mechanical device, and these data are handled.
Technical scheme: this terminal of the present invention is the center with the microcontroller, wherein, power module, house dog and the reset circuit of the CAN bus interface of part of data acquisition, RS-232 bus interface, switching value and analog quantity IO interface and microcontroller peripheral circuit, real-time clock, static memory, GPS module, gsm module respectively with microcontroller) join, SIM card and gsm module join.
" P00～P07 " of the micro-control circuit of microcontroller " U13 " holds respectively, and correspondence connects " D0～D7 " end that static memory is a static memory circuit " U18 ", " AD0～AD7 " end that the CAN bus interface is interface circuit " U1 ", " AD0～AD7 " end that real-time clock is clock circuit " U19 "; " RESET " termination house dog of the micro-control circuit of microcontroller " U13 " and reset circuit are " RST " end of reset circuit " U17 ".
The present invention gathers the residing geographical position coordinates of engineering mechanical device by GPS (Global Positioning System) module, then these packing data are handled and sent to the supervisory control comuter of Surveillance center by GSM (Global System forMobile Communication) short message or GPRS (General Packet Radio Service) mode, also can send on the user mobile phone by short message in addition, terminal can also receive the control command that host computer sends.
The running parameter of the engineering machinery that the part of data acquisition circuit is gathered mainly contains: the data such as duty of hydraulic system working pressure, engine speed, engine motor oil pressure, equipment.Terminal can realize the collection of data by following three kinds of modes: (1) receives the detection that has CAN (Controller Area Network) interface, the data of opertaing device output by the Controller Area Network BUS interface, finishes the collection to data; (2) obtain the data that the equipment that has RS-232 interface spreads out of by the RS-232 asynchronous serial communication, realize collection data; (3) expansion switch amount, analog acquisition interface increase circuit such as detection and measurement, realize the collection to data.
Positioning function: obtain information such as the three-dimensional geographical location information (longitude, latitude, highly) of engineering machinery and speed by global position system GPS (Global Positioning System).These information are satellite ephemeris, pseudorange observation datas of receiving by GPS receiver basis, calculate three-dimensional coordinate and speed.The GPS receiver is to adopt OEM (Original equipment manufacturer) module, and links to each other with microcontroller by serial port.
The electric work energy of autotomying: whether terminal can be by disconnecting the power supply of terminal the command determination of some status detection of engineering machinery and host computer.Terminal is being worked always if engineering machinery is not used for a long time, will certainly cause the energy of the Vehicular accumulator cell of engineering machinery to deplete, and influences use next time of engineering machinery.For fear of the generation of this situation, terminal has increased the electric work energy of autotomying.Terminal is cut off the electricity supply by PC control after how long engineering machinery leaves unused again, and host computer sends to terminal with order, and the order that end-on is received is resolved, judged, carries out corresponding operation then.
Select relatively freer with the host computer communication mode: the host computer communication mode adopts Golbal System for Mobile Communic-ations short message and GPRS dual mode.Which kind of mode is terminal can according to circumstances select to take to host computer transmission data and host computer to the terminal transmission order time.
The user can also carry out two-way communication with terminal by mobile phone.Terminal can send the short message about the engineering machinery situation on the mobile phone of authorized user, but terminal is not all to send SMS message to any one user, but will be through authorizing.Host computer sends to the phone number of authorized user on the terminal, and terminal after its judgement is determined is stored Subscriber Number.When authorized user when terminal is asked for data, as long as send querying command and user cipher after terminal according to concrete requirement, terminal is receiving these information, and to its resolve, current state information (residing position, working condition etc.) with engineering machinery behind the correct judgment sends on the mobile phone of authorized user, these information adopt the Chinese demonstration on the authorized user mobile phone.
Terminal can be added up data, analysis, fault diagnosis.If all send all data that receive to host computer, certainly will increase the flow that transmits data to host computer, and then cause the increase of GSM/GPRS communication cost, so increase functions such as data statistics, analysis and fault diagnosis.Terminal according to the characteristic of the content of communication protocol and data will add up, analysis result sends to host computer, if the fault of judging or warning message then be uploaded to host computer immediately.
Terminal can be stored data.All there is FLASH to be used for storing phone number in gsm module and SIM (the Subscriber Identify Module) card, but also can be in this part space with the data storage after handling.If under the bad situation of GSM network, data then are deposited in the FLASH, and the GSM network coverage by the time sends the data to host computer or authorized user in the time of good.
Beneficial effect: our oolemma has CAN interface, RS-232 serial ports, level signal output, pulse signal output, at different engineering machinery, can adopt different interfaces and its controller to communicate, and finishes control function; The switching value that the present invention has, analog acquisition passage can be gathered the various status informations of engineering machinery, to be used for statistic and fault diagnosis etc.; The GPS positioning function that the present invention has can obtain the positional information of engineering machinery in real time, to be used for monitoring; The radio communication function that the present invention has can be timely passes to monitoring center and authorized user with the information of terminal itself, simultaneously, every command information that also can receiving center, thus realize the real-time monitoring of engineering machinery; The electric work energy of autotomying that the present invention has can be saved the energy of Vehicular accumulator cell, thereby guarantees engineering machinery and mobile unit operation steady in a long-term thereof.Its perfect in shape and function, with low cost.
Description of drawings
Fig. 1 is an overall principle of compositionality block diagram of the present invention.Wherein have: CAN bus interface 1, RS-232 bus interface 2, switching value and analog quantity IO interface 3, power module 4, microcontroller 5, house dog and reset circuit 6, real-time clock 7, static memory 8, GPS module 9, gsm module 10, SIM card 11.
Fig. 2 is microcontroller of the present invention and peripheral circuit.Comprising: microcontroller 5, house dog and reset circuit 6, real-time clock 7, static memory 8, GPS module 9.
Fig. 3 is switching value of the present invention and analog quantity input/output interface circuit.Comprising: switching value and analog quantity IO interface 3.
Fig. 4 is CAN bus interface of the present invention and RS-232 bus interface circuit.Comprising: CAN bus interface 1, RS-232 bus interface 2.
Fig. 5 is GSM interface of the present invention and SIM card interface circuit.Comprising: gsm module 10, SIM card 11.
Fig. 6 is a power supply circuit of the present invention.Comprising: power module 4.
Embodiment
This terminal is the center with microcontroller 5, wherein, the power module 4 of the CAN bus interface 1 of part of data acquisition, RS-232 bus interface 2, switching value and analog quantity IO interface 3 and microcontroller 5 peripheral circuits, house dog and reset circuit 6, real-time clock 7, static memory 8, GPS module 9, gsm module 10 join with microcontroller 5 respectively, and SIM card 11 is joined with gsm module 10.
Table 1 is main devices tabulation of the present invention;
| Device number | Title | Model |
| U1 | The CAN controller | SJA1000 |
| U2 | The CAN control unit interface | PCA82C250 |
| U3 | RS-232 driver | MAX232ECPE(16) |
| U4 | Three-state buffer/line drive | 74HC244 |
| U5 | Gsm module | MC35 |
| U6 | The SIM card seat | Do not have |
| U7 | Comparer | LM2903 |
| U8 | 8 select 1 analog switch | CD4051 |
| U9 | A/D converter | TLC1549 |
| U10 | Code translator | 74HC138 |
| U11 | Logic sum gate | 74HC32 |
| U12 | Three-state transceiver | 74HC245 |
| U13 | Microcontroller | W78E516 |
| U14 | Three-state buffer/line drive | 74HC244 |
| U15 | The 8D latch | 74HC373 |
| U16 | The 8D trigger | 74HC374 |
| U17 | The house dog and the chip that resets | MAX1232 |
| U18 | Static memory (SRAM) | 62HC256 |
| U19 | Real-time timepiece chip | DS12887 |
| J5 | The GPS module interface | Do not have |
As shown in Figure 1, vehicle-mounted engineering machinery satellite positioning communication terminal with several data acquisition mode, its hardware circuit mainly partly are made up of part of data acquisition (CAN bus interface, RS-232 interface, photoelectrical coupler, switching value and analog quantity IO interface), microcontroller peripheral circuit (single-chip microcomputer, address decoding circuitry, SRAM, real-time clock, watchdog circuit resets), power module, GPS module, gsm module, serial ports handover module etc.According to require the function finished, on the platform of hardware, write corresponding software and realize its function.
Select to realize by toggle switch when data acquisition modes is selected, microcontroller calls the function corresponding function by the state that reads toggle switch, carries out operation accordingly, such as selecting the CAN signal procedure.Data acquisition circuit CAN interface section adopts special-purpose CAN bus controller SJA1000 and driver chip 82C250 and some its peripheral necessary circuitry to constitute, SJA1000 is an I/O device that is similar to static memory addressing, to the operation of SJA1000 internal register just as to RAM.The address area of SJA1000 comprises control section and message buffer in addition, initialization is that programming writes parameter to control section, the message that will send writes the transmission buffer zone, successfully receive message after microcontroller read message from send buffer, and Free up Memory is for using next time.RS-232C electrical specification regulation adopts negative logic, the logical zero level be+3V～+ 15V between, the logical one level is-15V～-3V between, so need pass through level conversion when being connected with Transistor-Transistor Logic level.The MAX232 that selects MAXIM company for use uses the power supply of list+5V power supply as the serial ports level transferring chip, has two receivers and two transmitters.There are voltage multiplying circuit and change-over circuit in MAX232 inside, and the outside electric capacity that only need meet 4 1uF gets final product.Switch acquisition comes expansion interface by the bus of single-chip microcomputer, the parallel port I/O chip of expansion, its parallel data line is connected with the data line of microcontroller bus, this chip and the same address that is assigned of other devices on the bus, can realize the read-write operation of I/O interface by this address, the switching value input and output are all passed through photoelectricity and are isolated in addition.The used AD converter of analog acquisition is selected 10 serial AD C TLC1549 for use, adopts analog switch to select the analog input channel.
The GPS information acquisition adopts GPS receiver module EB6801 to finish, and EB6801 links to each other with single-chip microcomputer by serial ports, and it is to follow the standard of NMEA (National MarineElectronics Association) that communication baud rate is selected the data of 9600bps module output.The complete NMEA data of module per second output one bag, the software function of this part is handled these data exactly, extracts needed data (longitude and latitude, highly, speed, Time of Day).
Engineering machinery operating state data and gps data that terminal is gathered, handled finally send data to host computer by gsm module.Gsm module adopts the first item GPRS module MC-35 of Siemens company.This GPRS module receiving velocity can reach 85.6kbps, and transmission rate can reach the support that the maximum certainly data throughout of 21.5kbps. also depends on GPRS network.MC-35 supports GSM900 and GSM1800 Dual Band network.MC-35 is connected with microcontroller by serial line interface, can adapt to 1200,2400,4800,9600,19200,38400,57600 automatically, the baud rate of 115200bps.Because the system works voltage of terminal is DC+5V, level signal also is a Transistor-Transistor Logic level, and the operating voltage range of MC-35 is 3.3～4.4V.So will adapt to the requirement of MC-35 for it designs feed circuit separately to power supply.The level signal of the serial port data-interface end of MC-35 neither the TTL standard in addition, and is specific as follows:
Output terminal: low level Vout, low, max=0.2V; High level Vout, high, min=2.25V, Vout, high, max=2.76V
Input end: low level Vin, low, min=-0.3V, Vin, low, max=0.5V; High level Vin, high, min=2,01V, Vin, high, max=3.3V
So, change serial port input and output level, adapt to the interface level requirement of MC-35.The software function of this part mainly is according to AT order module to be operated the data transmission that is implemented in different working method (GSM short message and GPRS) under and the reception of data.In addition, no matter be to be operated in the GSM short message way, or the GPRS mode, its data encoding format is all arranged, so the packing data that will send will be become desired form when sending data, receiving data equally then is that data unpack process.There is the FLASH that uses to the user storage telephone number MC-35 and SIM card inside, and these FLASH can be used for storing data.Good the data that will store according to the format editing of corresponding AT order, send to module by serial ports, can finish data storage operations.
Serial ports switches employing 8 homophases three-state buffer/line drive 74HC244 complete operation, selects port by the Enable Pin of control 74HC244.The house dog and the chip that resets adopt the microprocessor monitors device MAX1232 of MAXIM company, WatchDog Timer can be configured to 150ms, 600ms, 1.2s, adopt the house dog of 600ms to overflow the cycle in the native system, do like this and mainly consider the time shortening that as far as possible program is in abnomal condition on the one hand, simultaneously can be too not short by the cycle of taking into account " feeding dog ".The clock clock chip adopts the DS12887 of DALLAS semiconductor company, it can produce second, branch, the time, week, day, the moon, year etc. 7 markers, and can read, revise these markers by programming, and can select scale-of-two or binary-coded decimal to represent these markers, can also produce fixed time interval by programming and interrupt, can satisfy the needs of system like this real-time clock.
In the process of using according to the selection of data acquisition interface, obtain the s main working parameters of engineering machinery, as the data such as duty of hydraulic system working pressure, engine speed, engine motor oil pressure, equipment, and the geographical location information of engineering machinery finishes these data processing, and to put into SRAM medium to be sent.The order specified data that terminal hands down according to host computer when and the data of which kind of type send to host computer, terminal sends on the user mobile phone by short message according to the order of the authorized user information that the user is required in addition.By terminal and the two-part work of host computer monitoring software, realize monitoring work to a large amount of engineering machinery, the managerial personnel of engineering machinery also can understand the machine work situation of job location in addition.
Claims (2)
1. vehicle-mounted engineering machinery satellite positioning communication terminal with several data acquisition mode, it is characterized in that this terminal is the center with microcontroller (5), wherein, the CAN bus interface (1) of part of data acquisition, RS-232 bus interface (2), the power module (4) of switching value and analog quantity IO interface (3) and microcontroller (5) peripheral circuit, house dog and reset circuit (6), real-time clock (7), static memory (8), GPS module (9), gsm module (10) joins with microcontroller (5) respectively, and SIM card (11) is joined with gsm module (10).
2. the vehicle-mounted engineering machinery satellite positioning communication terminal with several data acquisition mode according to claim 1, " P00～P07 " that it is characterized in that the micro-control circuit " W78E516 " of microcontroller (5) are held respectively, and correspondence connects " D0～D7 " end that static memory (8) is a static memory circuit " 62HC256 ", " AD0～AD7 " end that CAN bus interface (1) is interface circuit " SJA1000 ", " AD0～AD7 " end that real-time clock (7) is clock circuit " DS12887 "; " RESET " termination house dog of the micro-control circuit " U13 " of microcontroller (5) and reset circuit (6) are " RST " end of reset circuit " MAX1232 ".
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100461045C (en) * | 2007-07-12 | 2009-02-11 | 上海交通大学 | Two-way CAN bus vehicle mounted remote communicating and satellite positioning system |
| CN101827433B (en) * | 2010-03-10 | 2012-07-18 | 东南大学 | Energy-saving operating method for satellite positioning communication terminal of engineering machinery |
| CN103369046A (en) * | 2013-07-17 | 2013-10-23 | 天泽信息产业股份有限公司 | Application method of intelligent handhold terminal and corresponding platform of intelligent handhold terminal in car networking industry post-market |
| CN105774751B (en) * | 2014-12-22 | 2018-02-02 | 北京博创联动科技有限公司 | A kind of intelligent information system and intelligent information control method |
| CN106028304A (en) * | 2016-05-03 | 2016-10-12 | 王家城 | Mobile communication terminal having wireless transmission function of embedded SIM card data |
| CN110849652B (en) * | 2019-12-06 | 2021-10-15 | 中国交通建设股份有限公司 | Intelligent control method and system for physical model test process |
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