CN103576636A - Intelligent touch screen display control system and method based on CAN bus - Google Patents
Intelligent touch screen display control system and method based on CAN bus Download PDFInfo
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Abstract
The invention discloses an intelligent touch screen display control system and method based on a CAN bus. The device comprises a central signal processing control core board module, a liquid crystal display and touch screen interface module, a USB interface module, an SD card storage module, a system start selection module, a camera module, a real-time clock module, a CAN communication module, a GPRS remote communication module, a GPS module, a power management and reset module, an RS232 serial port communication interface module and the like. The display control system has multiple configurable CAN communication Baud rates, is provided with a touch display screen and has an acquisition cycle capable of being set. The system has high intelligence, universality, compatibility and expansibility when a Windows CE operation system runs. The system is provided with the camera module so as to monitor real-time environment conveniently, is provided with the GPS module and the GPRS module so as to facilitate system positioning and remote data analysis and sharing, and can meet the requirement of data acquisition in various states of the CAN bus.
Description
Technical field
The present invention relates to a kind of data acquisition display control unit and method of project monitor and control communication technical field, belong to electromechanical equipment electronic monitoring technical field, specifically a kind of Intelligent touch screen display control program and method based on CAN bus.
Background technology
In engineering system running, often need to monitor equipment state and working environment in work.Traditional supervisory system can only be shown to monitor simple Monitoring Data, and the monitoring of equipment room is all isolated, this makes user or the producer on the whole the state of working equipment, service condition, distribution situation not to be understood and to be analyzed, the waste of natural resources and human resources certainly will be caused like this, the effect of equipment can not be given full play to.Effectively mode is, by the data upload of modules, to host computer, host computer is analyzed aggregation of data, then data is sent to remote terminal and carries out comprehensive analysis again, last reasonably optimizing resource allocation.
Along with the widespread use of the control system based on CAN bus in industrial or agricultural, by gathering CAN bus data, the working condition of the parameter of external environment condition or equipment is monitored in real time, be a very effective and feasible method.The working parameters of engineering is as pressure, the speed of travel, engine speed, flow, temperature, vibration, noise, wind speed, GPS longitude and latitude etc., characteristic is different, some variations are fast, some variations are slow, when some and have, when some and nothing, for unlike signal feature, we adopt CAN bus network to articulate the mode of node, give different ID value of each slave computer module assignment, each node is articulated in the CAN bus of native system, changes fast signal data disappearance problem like this with regard to having avoided, and changes slow data transmission redundancy issue;
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of Intelligent touch based on CAN bus screen display control program and method are provided, the information such as the working condition of watch-dog and geographic coordinate meets the needs of remote real-time monitoring easily.
The present invention is achieved by the following technical solutions:
A kind of Intelligent touch screen display control program based on CAN bus involved in the present invention, comprises that central signal processing controls core board module, liquid crystal display and touch screen interface module, usb interface module, SD card memory module, system start selection module, camera module, real-time clock module, CAN communication module, GPRS remote communication module, gps satellite locating module, power management and reseting module, RS232 serial communication interface module, gps antenna, GPRS telecommunication antenna, SDHC storage card and LCD Panel;
Described central signal processing controls core board module is consisted of central processing element, FLASH circuit, clock circuit and interface circuit; Central signal processing controls core board module connects liquid crystal display and touch screen interface module, usb interface module, SD card memory module, system start selection module, camera module, real-time clock module, CAN communication module, GPRS remote communication module, gps satellite locating module, power management and reseting module and RS232 serial communication interface module; Liquid crystal display and touch screen interface module connect LCD MODULE; SD card memory module connects SDHC; Gps satellite locating module connects gps antenna, and GPRS remote communication module connects GPRS telecommunication antenna.
Described SD card memory module is passed through I
2c bus is connected with central signal processing controls core board module; System starts selects module, toggle switch circuit, consists of, and for selecting the Starting mode of the Intelligent touch screen display control program based on CAN bus, decision systems still starts from FLASH from SD card start-up; Camera module consists of ov9650 module and utilizing camera interface circuit, and passes through I
2c bus is connected with central signal processing controls core board module, for the supervision of environment to external world; Real-time clock module passes through I
2c bus is connected with central signal processing controls core board module, for to operating system, provide comprise year, month, day, hour, min, second and week equal time information; CAN communication module is connected with central signal processing controls core board module by spi bus, for communicating by letter with the Controller Area Network BUS of watch-dog; Power management and reseting module, all have and be connected with other each module, for power supply is provided, and is converted into the needed operating voltage of each module; Gps antenna is connected with gps satellite locating module; GPRS telecommunication antenna is connected with GPRS remote communication module, and the communication of GPRS need to have the support of mobile service, need to insert China Mobile's SIM card and use; SDHC storage card is connected with SD card memory module by the draw-in groove in SD card memory module, for information such as storage server IP address, module No., No. ID, controller local area network and geographic position; LCD screen is connected with touch screen interface module with liquid crystal display with the interface circuit in touch screen interface module by liquid crystal display;
Described power management and reseting module comprise general supply circuit, core board power circuit, GPS power circuit and GPRS power circuit, wherein:
By 1 pin of power conversion chip, 2 pins by feed-forward capacitance ground connection, power conversion chip consist of 2 pins of voltage stabilizing diode ground connection, the power conversion chip anodal institute that 3 pins of ground connection, power conversion chip and 4 pins of the direct Power supply and grounding conversion chip of 5 pins are connected to capacitor C 2 of connecting with capacitor C 2 by coil L1 described general supply circuit; Core board power circuit consists of polar capacitor C3 ground connection the earth of capacitor C 4 and capacitor C 5 and 3 pins of power conversion chip 1 pin ground connection of power conversion chip, 2 pins of power conversion chip; By 1 pin of switching power source chip and 5 pins of the direct ground connection of 2 pins and switching power source chip and 6 pins, the earth by shunt capacitance C6 and C7 forms GPS power circuit; GPRS power circuit consists of by shunt capacitance C8 ground connection with by capacitor C 9 and the earth of C10 respectively the two ends of voltage stabilizing diode;
Described CAN communication module mainly consists of CAN high-speed transceiver, CAN controller and crystal oscillator, wherein 1 of CAN controller is connected respectively 3 and 4 pins of CAN high-speed transceiver with 2 pins, the 7th pin of CAN controller is connected with the 8th pin by crystal oscillator, the direct ground connection of the 9th pin of CAN controller, the 6th pin of CAN high-speed transceiver is connected with the 7th pin by terminal resistance;
An Intelligent touch screen display control method for bus, adopts said system to show control, it is characterized in that, operation steps is as follows:
The first step, pushes FLASH by toggle switch and starts, and switches on power and starts the operating system;
Second step is opened the watchdog routine writing in operating system;
The 3rd step, arranges a monitoring period, and the traffic rate of CAN is set, and arranges and gathers the GPS positional information cycle, and if do not arranged, all are default value, start to monitor external environment condition;
The 4th step, after watchdog routine starts, the parameter of slave computer passes in native system by CAN agreement and is presented on touch-screen, gps satellite locating module is presented at the updating location information of native system on screen simultaneously, camera module is presented at the video pictures collecting on screen, and the locating information of the data message that simultaneity factor transmits CAN communication module automatically, id information, system time label and GPS is kept in SD card;
The 5th step, if there is parameter to reach certain predetermined critical value, system can be automatically sends instruction to slave computer and adjust parameter and make it normally so, monitor can be sent and order to slave computer by touch-screen according to video pictures;
The 6th step, the data message after monitoring period completes in system automatic arranging SD card packing send to remote console by GPRS remote communication module;
The 7th step, whether monitoring period finishes rear system detection SD card capacity and will take, and if it is empties SD card, if otherwise skip this step, operating system is closed automatically;
The present invention has following apparent outstanding substantive distinguishing features and remarkable advantage compared with prior art: device of the present invention, and stable performance, reliability is high, visual high, workable, has very high compatibility and extensibility; Native system goes for the data acquisition of the signal of different characteristic, data transmission cost is low and real-time is high, time tag is accurately and without omission, the real-time clock error of proofreading and correct through GPS time service clock is less than 1 second, having good universality, compatibility and expansibility, can meet the various project data acquisition systems based on CAN bus, is remote real-time monitoring, failure prediction prevention, fault diagnosis is laid a good foundation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Intelligent touch screen display control program based on CAN bus of the present invention;
Fig. 2 is the theory of constitution figure of power management of the present invention and reseting module;
Fig. 3 is the schematic diagram of CAN communication module of the present invention;
Fig. 4 is system operational flow diagram of the present invention;
Embodiment
Details are as follows by reference to the accompanying drawings for the preferred embodiments of the present invention:
Embodiment mono-:
As shown in Figure 1, the Intelligent touch screen display control program based on CAN bus described in the present embodiment, comprise central signal processing controls core board module (101), it is characterized in that: described central signal processing controls core board module (101) is consisted of central processing element, FLASH circuit, clock circuit and interface circuit; Central signal processing controls core board module (101) connects usb interface module (103), SD card memory module (104), system startup selection module (105), camera module (106), real-time clock module (107), power management and reseting module (111) and RS232 serial communication interface module (112); Central signal processing controls core board module (101) is connected with gps antenna (113) by gps satellite locating module (110), and the top that gps antenna (113) is placed on cotton picker pilothouse is for receiving satellite signal; Central signal processing controls core board module (101) is connected with GPRS telecommunication antenna (114) by GPRS remote communication module (109), and the communication of GPRS need to have the support of mobile service, need to insert China Mobile's SIM card and use; Central signal processing controls core board module (101) is connected with LCD screen (116) with touch screen interface module (102) by liquid crystal display, LCD screen (116) is the resistance screen of 10.4 inches, be placed in the pilothouse of cotton picker, for the display platform of monitoring; Central signal processing controls core board module (101) is connected with CAN communication module (108) by spi bus, the data that CAN communication module (108) transmits for gathering each module sensors of cotton picker; Liquid crystal display and touch screen interface module (102) connect LCD MODULE (116); SD card memory module (104) connects SDHC(115); Gps satellite locating module (110) connects gps antenna (113), and GPRS remote communication module (109) connects GPRS telecommunication antenna (114).
Embodiment bis-:
The present embodiment and embodiment mono-are basic identical, and special feature is as follows:
Described usb interface module (103) is synchronizeed for debug system program and with computing machine; System starts selects module (105) to consist of toggle switch circuit, for selecting the Starting mode of the Intelligent touch screen display control program based on CAN bus, decision systems still starts from FLASH from SD card start-up, all programming is compiled for operating system and monitoring software in the present embodiment, and this module is directly got to FLASH and started; Described camera module (106) consists of ov9650 module and utilizing camera interface circuit, and it passes through I
2c bus is connected with central signal processing controls core board module (101), and this module is placed on the afterbody of cotton picker, for the supervision of environment to external world; Real-time clock module (107) passes through I
2c bus is connected with central signal processing controls core board module (101), for to operating system, provide comprise year, month, day, hour, min, second and week equal time information; Described RS232 serial communication interface module (112) is connected with central signal processing controls core board module (101) by max232 level transferring chip, for the debugging of program; SDHC storage card (115) is connected with SD card memory module (104) by the draw-in groove in SD card memory module (104), for information such as storage server IP address, module No., No. ID, controller local area network and geographic position; Power management and reseting module (111) obtain power supply in cotton picker pilothouse, and driving indoor power supply is converted into each module usable level.
In the present embodiment, the ARM microcontroller that central processing element is Samsung, model is S3C6410; Gps satellite locating module (110) is GPS navigation and the time service receiver Copernicus GPS of U.S. Trimble company; The gsm module GTM900 that GPRS telecommunication module (109) is Huawei Company; Camera module (106) is comprised of the COMS camera ov9650 of Omnivision company; LCD screen (116) is the LCD screen of 10.4 inches with LVDS interface that Shenzhen Mai Ruide company produces, and model is G104SN03.
As shown in Figure 2, power management and reseting module (111) comprise general supply circuit (241), core board power circuit (242), GPS power circuit (243) and GPRS power circuit (244), general supply circuit (241) is by 24 Fu Zhiliu electricity Yuan Shuruduankou (201), 24V turns 5V power conversion chip LM2596-5(203) 1 pin by feed-forward capacitance (202) ground connection, 24V turns 5V power conversion chip LM2596-5(203) 2 pins by voltage stabilizing diode (204) ground connection, 24V turns 5V power conversion chip LM2596-5(203) 2 pins by coil L1(205) with capacitor C 2(206) ground connection of connecting, 24V turns 5V power conversion chip LM2596-5(203) 3 pins and the direct ground connection of 5 pins, 24V turns 5V power conversion chip LM2596-5(203) 4 pins be connected to capacitor C 2(206) positive pole and 5V DC output end mouth (207) form, this circuit provides primary power to whole system, core board power circuit (242) turns 3.3V power conversion chip LM1117-3.3(213 by 5 Fu Zhiliushuruduankou (211), 5V) 1 pin ground connection, 5V turn 3.3V power conversion chip LM1117-3.3(213) 2 pins by capacitor C 4(214) and capacitor C 5(215) earth, 5V turn 3.3V power conversion chip LM1117-3.3(213) 3 pins by polar capacitor C3(212) ground connection and 3.3 volts of central processing unit output port of power source (216) form, this circuit is given separately central signal processing controls core board module (101) power supply, GPS power circuit (243) is by 5 Fu Zhiliushuruduankou (221), switching power source chip TPS76833(222) 1 pin and the direct ground connection of 2 pins, switching power source chip TPS76833(222) 5 pins and 6 pins by shunt capacitance C6(223) and earth C7(224) and GPS output port of power source (225) form, this module is given separately GPS module for power supply, GPRS power circuit (244) is by 5 Fu Zhiliushuruduankou (231), voltage stabilizing diode M7(233) two ends respectively by shunt capacitance C8(232) ground connection and by capacitor C 9(234) and earth C10(235) and GPRS output port of power source (236) form, this circuit is given separately GPRS module for power supply, 24 Fu Zhiliu electricity Yuan Shuruduankou (201) of general supply circuit (241) are directly connected with the vehicle power positive pole of cotton picker, through power conversion chip, to system, provide 5V power supply, be 5V output, this output is directly connected with 211 ports, 221 ports, 231 ports.The power supply ground of modules is connected with vehicle power negative pole.In the present embodiment, the electrochemical capacitor that described feed-forward capacitance (202) is 35V330UF, voltage stabilizing diode (204) is IN5824, filter inductance L1(205) be 68UH3A.
As shown in Figure 3, the CAN communication module (108) of the present embodiment comprises the high interface of CAN (301), the low interface of CAN (302), build-out resistor (303), high-speed CAN transceiver (304), CAN controller (305), power input interface (307), crystal oscillator (306), SPI sheet selects pin (308), SPI transmitting-receiving pin (309), SPI to send out spasm pin (310), SPI clock pin (311) and interrupt pin (312); Wherein 1 of CAN controller (305) is connected respectively 3 and 4 pins of CAN high-speed transceiver (304) with 2 pins, the 7th pin of CAN controller (305) is connected with the 8th pin by crystal oscillator (306), the direct ground connection of the 9th pin of CAN controller (305), the 6th pin of CAN high-speed transceiver (304) is connected with the 7th pin by build-out resistor (303); The high interface of described CAN (301) and the low interface of CAN (302) are for articulating CAN node, power input interface (307) connects 5V power supply, build-out resistor (303) is 120 Ohmages, the MCP2510 chip with SPI interface that CAN controller (305) WeiMT company produces, the MCP2551 chip that high-speed CAN transceiver (304) WeiMT company produces, crystal oscillator (306) frequency is 8MHZ, and the SPI interface of controller is directly connected with S3C6410 main control chip.
Embodiment tri-:
The present embodiment is identical with embodiment bis-, take cotton picker as example, specific as follows:
The described Intelligent touch screen display control program based on CAN bus is started and is selected module (105) and RS232 serial communication interface module (112) that the WINCE operating system programming that is suitable for cotton picker of having reduced is arrived in this control system by usb interface module (103), SD card memory module (104), system, can normally move.
The Intelligent touch screen display system based on CAN bus of above-mentioned cotton picker is arranged in cotton picker pilothouse; The CAN node of slave computer is by the high interface of CAN (301) of CAN communication module (108), and the low interface of CAN (302) is received in bus; Gps antenna (113) is fixed on pilothouse top, towards sky, places; GPRS telecommunication antenna (114) is fixed on pilothouse inwall; SD card (115) is put into draw-in groove; 10.4 inches of LCD Panel (116) are fixed in pilothouse; 24 Fu Zhiliu electricity Yuan Shuruduankou (201) of general supply circuit (241) are directly connected with the vehicle power positive pole of cotton picker, and after cotton picker starts, native system can work.
Embodiment tetra-:
Referring to Fig. 4, this Intelligent touch screen display control method based on CAN bus, adopts said system to show control, it is characterized in that:
An Intelligent touch screen display control method for CAN bus, adopts the Intelligent touch screen display control program based on CAN bus according to claim 1 to show control, it is characterized in that: operation steps is as follows:
The first step, pushes FLASH by toggle switch and starts, and switches on power and starts the operating system;
Second step is opened the watchdog routine writing in operating system;
The 3rd step, arranges a monitoring period, and the traffic rate of CAN is set, and arranges and gathers the GPS positional information cycle, and if do not arranged, all are default value, start to monitor external environment condition;
The 4th step, after watchdog routine starts, the parameter of slave computer passes in native system by CAN agreement and is presented on touch-screen, gps satellite locating module (110) is presented at the updating location information of native system on screen simultaneously, camera module (106) is presented at the video pictures collecting on screen, and the locating information of the data message that simultaneity factor transmits CAN communication module (108) automatically, id information, system time label and GPS is kept in SD card (115);
The 5th step, if there is parameter to reach certain predetermined critical value, system can be automatically sends instruction to slave computer and adjust parameter and make it normally so, monitor can be sent and order to slave computer by touch-screen according to video pictures;
The 6th step, the data message after monitoring period completes in system automatic arranging SD card (115) packing send to remote console by GPRS remote communication module (109);
The 7th step, whether monitoring period finishes rear system detection SD card (115) capacity and will take, and if it is empties SD card (115), if otherwise skip this step, operating system is closed automatically.
In the described first step, system is selected to start or start from SD card (115) from FLASH, and operating system is Windows CE system; In described second step, intrasystem program is touched to click and carries out; In described the 3rd step, monitoring period, CAN traffic rate and GPS placement data acquisition cycle are set up; In described the 4th step, all data messages and video information are presented on screen, according to data variation displaying contents, there is corresponding dynamically indication, system is kept at CAN data message and GPS locating information in SD card (115), described time tag is wince system time, by real-time clock module, is provided; In described the 5th step, system is made a response according to CAN data, automatically sends order to slave computer, or manually assigns instruction by touch-screen; In described the 6th step, GPRS remote communication module (109) sends to remote terminal the data in SD card (115) automatically;
Embodiment five:
The present embodiment is identical with embodiment tetra-, as follows in conjunction with cotton picker example:
The cotton picker operating process of Intelligent touch based on CAN bus screen display control program of above-mentioned installation of take is below embodiment, further illustrates the intellectuality that the present invention shows control:
The parameter gathering comprises from different I D corresponding parameter: ID1 (the machine speed of travel), ID2 (machine hydraulic pressure), ID3 (coolant water temperature, oil temperature), ID4 (Coolant-Level, engine oil pressure, engine oil level), ID5 (drum rotation speed), ID6 (rotation speed of fan), ID7 (output in real time), ID8 (1 tunnel cotton picking amount), ID9 (2 tunnel cotton picking amount), ID10 (3 tunnel cotton picking amount), GPS longitude and latitude data, dynamic video information; Touch-screen shows the data after above parameter and processing, as: average output, harvesting area, maximum production, minimum output, harvesting timing, output distribution plan and alarm lamp etc.
The present embodiment is set: the different requirements according to each node to real-time, the node that requirement of real-time is strict forms high-speed CAN communication network, the lower node of other requirement of real-times is formed to middling speed CAN communication network, the undemanding node of requirement of real-time is formed to low speed CAN communication network and by repeater, the communication network of each different rates linked together and is articulated in the CAN bus of native system.High-speed traffic speed is 512KB/S, and middling speed traffic rate is 125KB/S, and low-speed communication speed is 50KB/S, and GPS collection period is 10S.
Design parameter is allocated as follows with corresponding traffic rate:
CAN is quick: ID1 (the machine speed of travel)
CAN middling speed: ID5 (drum rotation speed), ID6 (rotation speed of fan), ID7 (output in real time), ID8 (1 tunnel cotton picking amount), ID9 (2 tunnel cotton picking amount), ID10 (3 tunnel cotton picking amount)
CAN low speed: ID2 (machine hydraulic pressure), ID3 (coolant water temperature, oil temperature)
After above-mentioned cotton picker starts, the above-mentioned also start immediately of Intelligent touch screen display control program based on CAN bus.Data acquisition demonstration and control procedure, as shown in Figure 4, comprise the following steps:
401. cotton pickers start, the system start that powers on;
402.Windows CE os starting, watchdog routine self-starting, after watchdog routine starts, touch screen click START button starts monitoring;
403. watchdog routines empty SD card content after starting automatically;
404. native system acquiescence CAN bus acquisition rates are 512KB/S, and GPS collection period is 5S, and the System Operation cycle is 1 hour.The traffic rate that CAN bus is manually set is 512KB/S, and it is 10S that GPS collection period is set, and it is 2 hours that the System Operation cycle is set;
405. according to the speed of 404 settings and cycle, gather the data that slave computer CAN node transmits, and in real time ID7, ID8, ID9, ID10 No. ID and corresponding data and GPS positional information be take to the time in label is kept at SD card, the video information in save data, data message and screen module being collected is presented in LCD screen;
406. judge that whether SD card capacity soon takes, if carry out 407, otherwise carries out 414;
407. systems send to remote terminal by the data in SD card and average output now, harvesting area, maximum production and minimum output packing by GPRS module, empty SD card, carry out 411;
408. judge according to video information whether the surrounding of machine has potential safety hazard, if there is hidden danger manual operation immediately, carries out 409, otherwise continue to monitor whether have manual operation;
409. send order to slave computer, finish rear execution 411;
411. continue Information Monitoring and show, carry out 406;
412. judge whether normal operation of machine according to parameters such as hydraulic pressure, water temperature, oil temperature and rotating speeds, judge whether the surrounding of machine has potential safety hazard according to video information.If do not continue to monitor, if machine has abnormality to carry out 413;
413. send order to slave computer automatically, make cotton picker normal operation, after transmission order, carry out 411;
414. judge whether the operation period of system finishes, if end cycle carries out 415, if the cycle does not finish to carry out 411;
415. systems send to remote terminal by the data in SD card and average output now, harvesting area, maximum production, minimum output packing by GPRS module, empty SD card, carry out 416;
416. device power-off system shutdown;
Above-mentioned display control program has multiple configurable CAN communication baud rate, has tangible display screen, has the collection period that can arrange; Device of the present invention operation wince operating system has very high intelligent, universality, compatibility and expansibility, described device has camera module to be convenient to monitor real time environment, has GPS and GPRS module are convenient to system location and Remote Data Analysis and share, and can meet the needs that the various status datas based on CAN bus gather.
The above embodiment with reference to the specific embodiment of the present invention has described the present invention; but be not limitation of the present invention; equivalent variations and modification that those of ordinary skill in the art does according to spirit of the present invention, all belong to the protection domain of the claims in the present invention.
Claims (6)
1. the Intelligent touch based on CAN bus shields display control program, comprise central signal processing controls core board module (101), liquid crystal display and touch screen interface module (102), usb interface module (103), SD card memory module (104), system starts selects module (105), camera module (106), real-time clock module (107), CAN communication module (108), GPRS remote communication module (109), gps satellite locating module (110), power management and reseting module (111), RS232 serial communication interface module (112), gps antenna (113), GPRS telecommunication antenna (114), SDHC storage card (115) and LCD Panel (116), it is characterized in that:
Described central signal processing controls core board module (101) is consisted of central processing element, FLASH circuit, clock circuit and interface circuit, central signal processing controls core board module (101) connects liquid crystal display and touch screen interface module (102), usb interface module (103), SD card memory module (104), system starts selects module (105), camera module (106), real-time clock module (107), CAN communication module (108), GPRS remote communication module (109), gps satellite locating module (110), power management and reseting module (111) and RS232 serial communication interface module (112), liquid crystal display and touch screen interface module (102) connect LCD MODULE (116), SD card memory module (104) connects SDHC(115), gps satellite locating module (110) connects gps antenna (113), and GPRS remote communication module (109) connects GPRS telecommunication antenna (114).
2. the Intelligent touch based on CAN bus according to claim 1 shields display control program, it is characterized in that:
Described SD card memory module (104) is passed through I
2c bus is connected with central signal processing controls core board module (101); System starts selects module (105), toggle switch circuit, consists of, and for selecting the Starting mode of the Intelligent touch screen display control program based on CAN bus, decision systems still starts from FLASH from SD card start-up; Camera module (106) consists of ov9650 module and utilizing camera interface circuit, and passes through I
2c bus is connected with central signal processing controls core board module (101), for the supervision of environment to external world; Real-time clock module (107) passes through I
2c bus is connected with central signal processing controls core board module (101), for to operating system, provide comprise year, month, day, hour, min, second and week equal time information; CAN communication module (108) is connected with central signal processing controls core board module (101) by spi bus, for communicating by letter with the Controller Area Network BUS of watch-dog; Power management and reseting module (111), all have and be connected with other each module, for power supply is provided, and is converted into the needed operating voltage of each module; The communication of GPRS need to have the support of mobile service, need to insert China Mobile's SIM card and use; SDHC storage card (115) is connected with SD card memory module (104) by the draw-in groove in SD card memory module (104), for information such as storage server IP address, module No., No. ID, controller local area network and geographic position; LCD screen (116) is connected with touch screen interface module (102) with liquid crystal display with the interface circuit in touch screen interface module (102) by liquid crystal display.
3. the Intelligent touch based on CAN bus according to claim 1 shields display control program, it is characterized in that, described power management and reseting module (111) comprise general supply circuit (241), core board power circuit (242), GPS power circuit (243) and GPRS power circuit (244);
Described general supply circuit (241) by 1 pin of power conversion chip (203) 2 pins of 2 pins by feed-forward capacitance (202) ground connection, power conversion chip (203) by voltage stabilizing diode (204) ground connection, power conversion chip (203) by coil L1(205) with capacitor C 2(206) ground connection of connecting, 3 pins of power conversion chip (203) and 4 pins of the direct Power supply and grounding conversion chips of 5 pins (203) are connected to capacitor C 2(206) and anodal institute form; Described core board power circuit (242) by 1 pin ground connection of power conversion chip (213), 2 pins of power conversion chip (213) by capacitor C 4(214) and capacitor C 5(215) earth and 3 pins of power conversion chip (213) by polar capacitor C3(212) ground connection formation; Described GPS power circuit (243) by 1 pin of switching power source chip (222) and 5 pins of the direct ground connection of 2 pins and switching power source chip (222) and 6 pins by shunt capacitance C6(223) and earth C7(224) form; Described GPRS power circuit (244) by the two ends of voltage stabilizing diode (233) respectively by shunt capacitance C8(232) ground connection and by capacitor C 9(234) and earth C10(235) form.
4. the Intelligent touch based on CAN bus according to claim 1 shields display control program, it is characterized in that, described CAN communication module (108) is mainly by CAN high-speed transceiver (304), CAN controller (305) and crystal oscillator (306) form, 1 of described CAN controller (305) is connected respectively 3 and 4 pins of CAN high-speed transceiver (304) with 2 pins, the 7th pin of CAN controller (305) is connected with the 8th pin by crystal oscillator (306), the direct ground connection of the 9th pin of CAN controller (305), the 6th pin of CAN high-speed transceiver (304) is connected with the 7th pin by terminal resistance.
5. the screen of the Intelligent touch based on a CAN bus display control method, adopts the Intelligent touch screen display control program based on CAN bus according to claim 1 to show control, it is characterized in that: operation steps is as follows:
The first step, pushes FLASH by toggle switch and starts, and switches on power and starts the operating system;
Second step is opened the watchdog routine writing in operating system;
The 3rd step, arranges a monitoring period, and the traffic rate of CAN is set, and arranges and gathers the GPS positional information cycle, and if do not arranged, all are default value, start to monitor external environment condition;
The 4th step, after watchdog routine starts, the parameter of slave computer passes in native system by CAN agreement and is presented on touch-screen, gps satellite locating module (110) is presented at the updating location information of native system on screen simultaneously, camera module (106) is presented at the video pictures collecting on screen, and the locating information of the data message that simultaneity factor transmits CAN communication module (108) automatically, id information, system time label and GPS is kept in SD card (115);
The 5th step, if there is parameter to reach certain predetermined critical value, system can be automatically sends instruction to slave computer and adjust parameter and make it normally so, monitor can be sent and order to slave computer by touch-screen according to video pictures;
The 6th step, the data message after monitoring period completes in system automatic arranging SD card (115) packing send to remote console by GPRS remote communication module (109);
The 7th step, whether monitoring period finishes rear system detection SD card (115) capacity and will take, and if it is empties SD card (115), if otherwise skip this step, operating system is closed automatically.
6. the Intelligent touch screen display control method based on CAN bus according to claim 5, is characterized in that: in the described first step, system is selected to start or start from SD card (115) from FLASH, and operating system is Windows CE system; In described second step, intrasystem program is touched to click and carries out; In described the 3rd step, monitoring period, CAN traffic rate and GPS placement data acquisition cycle are set up; In described the 4th step, all data messages and video information are presented on screen, according to data variation displaying contents, there is corresponding dynamically indication, system is kept at CAN data message and GPS locating information in SD card (115), described time tag is wince system time, by real-time clock module, is provided; In described the 5th step, system is made a response according to CAN data, automatically sends order to slave computer, or manually assigns instruction by touch-screen; In described the 6th step, GPRS remote communication module (109) sends to remote terminal the data in SD card (115) automatically.
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