CN101368876B - Testing bench frame control system for open type internal combustion engine - Google Patents
Testing bench frame control system for open type internal combustion engine Download PDFInfo
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Abstract
The invention relates to an open-type internal combustion engine test bench measurement and control system, which is composed of a host computer, auxiliary input and output devices, a communication module, a smart communication protocol conversion modules CAN232MB and CAN485MB, an FTS3 series eddy current dynamometer digital measurement and control system, an FST2 series eddy current dynamometer measurement and control system, a DTU wireless data transmission equipment, the experiment-related peripheral with 232 interfaces, and a 485 network composed of the devices using the 485 communicationmode; the communication module communicates all the devices connected with the communication module through the CAN bus communication mode; and the application of the technical proposal can provide multi-channel digital acquisition channels to facilitate the access of various devices.
Description
Technical field
The present invention and a kind of testing bench frame control system for open type internal combustion engine belong to electric eddy current dynamometer observation and control technology field.
Background technology
In the present stage engine test stand TT﹠C system device, all communications, data transmission and control signal all adopt the mode of traditional wired connection to carry out.Because constantly improving and enhancing of TT﹠C system function, test the raising of condition, requirement, the dramatic growth of acquisition parameter, respective lines and parts also continue to increase, the digital collection passage is difficult to satisfy the requirement of existing test, the challenge of having proposed for the technical requirement of system.Because device integration is low, modularization is unintelligible, no bus structure, cause communication lengthy and jumbled, traffic rate is low, and reliability, security are low, and data sharing is poor, and circuit is subjected to the space to fetter problems such as big.At the problems referred to above, be badly in need of the new control system of a kind of brand new ideas and creative resultant.
Summary of the invention
The purpose of this invention is to provide a kind of a kind of testing bench frame control system for open type internal combustion engine that the multi-path digital acquisition channel makes things convenient for plurality of devices to insert that has.
For achieving the above object, the present invention adopts following technical scheme: a kind of testing bench frame control system for open type internal combustion engine, this system is reached and the supporting input-output device of host computer by host computer, communication module, intelligence communication protocol conversion module CAN232MB and CAN485MB, FTS3 series electric eddy current dynamometer numeral TT﹠C system and FST2 series electric eddy current dynamometer TT﹠C system, the DTU radio data-transmission equipment, 485 networks that carry 232 mouthful peripheral hardware and the equipment that uses 485 communication modes be made of relevant with test constitute, described communication module communicates with CAN bus communication mode and all devices that is connected to above it, the DTU radio data-transmission equipment is directly linked to each other with the CAN mouth of communication module by the CAN mouth that carries respectively with FTS3 series electric eddy current dynamometer numeral TT﹠C system, host computer carries 232 mouthfuls peripheral hardware by 232 mouthfuls that carry 232 mouthfuls of meeting intelligence communication protocol conversion module CAN232MB with relevant with test, CAN mouth through intelligence communication protocol conversion module CAN232MB links to each other with the CAN mouth of communication module, 485 networks of being made up of the equipment that uses 485 communication modes are by 485 mouthfuls that carry 485 mouthfuls of meeting intelligence communication protocol conversion module CAN485MB, through the CAN mouth of the intelligence communication protocol conversion module CAN485MB communication module that links to each other with the CAN mouth of communication module, FST2 series electric eddy current dynamometer TT﹠C system by carry 232,485 mouthfuls of 232 mouthfuls and 485 mouthfuls of CAN485MB that meet intelligence communication protocol conversion module CAN232MB respectively, the CAN mouth through intelligence communication protocol conversion module CAN232MB and CAN485MB links to each other with the CAN mouth of communication module respectively.
Described communication module is to isolate output by digital signal controller DSPIC30F6014A with the high-speed CAN driver for isolating CTM1050T that links to each other with it, radio frequency radiating circuit, RS232 chip, RS485 chip, six road photoelectricity to constitute.
Pin RXD, the TXD of described high-speed CAN driver for isolating CTM1050T meets pin C1RX, the C1TX of digital signal controller respectively, and pin CANH, the CANL of CTM1050T and CANG link to each other with 3 pins on the interface socket respectively.
Owing to adopted technique scheme, the CAN communication interface of communication module can be expanded 110 at most, can be easily with the various measurements relevant with test, measurement equipment, fuel consumption meter for example, torque gauge, flowmeter, tensimeter etc., receive on the communication module by the intelligence communication protocol conversion module, the measurement that each is relevant with system, measurement equipment all can adopt the mode of ladies and gentlemen's arbitration of no damage structure to compete to bus according to the bus access right of priority and send data, and the CAN compromise annulment station address coding, and communication data is encoded, this can make different nodes receive identical data simultaneously, each data between nodes real-time communication of communication network that these characteristics make the CAN bus constitute is strong, and constitute redundancy structure easily, the reliability of raising system and the dirigibility of system, simultaneously compare CAN bus communication speed height with other fieldbus, realize easily and the cost performance height.
DTU radio transmission apparatus in this system connects a CAN communication interface after the expansion of high-speed CAN isolator drive device by self CAN communication interface, with DTU radio transmission apparatus connecting system, after the DTU radio data-transmission equipment receives the data of digital signal controller or host computer transmission, after the data after will handling by its inner GPRS module, send to server among the Internet by GPRS network, the user can be with a terminal computer data download that inserts Internet, same user also can upload control command at this terminal computer, pass to the DTU radio transmission apparatus by GPRS network, after receiving orders, digital signal controller is passed in order, thereby realized remote monitoring.
The data message that digital signal controller in this system communication module can also will send just is grouped into one group of byte arrays before transmission, its each byte is sent to coding chip one by one encodes, send into the wireless radiofrequency transmitter module through coded data, after modulated, from antenna in the mode of radio frequency to aerial emission, can make like this with testing relevant peripheral hardware and break away from the constraint of space and circuit, develop towards portable, portable direction.
Communication module in this system also has standby 232 communication interfaces, standby 485 communication interfaces, also can directly communicate with the equipment with 232 communication interfaces or 485 communication interfaces by 232 communication modes or 485 communication modes.
Description of drawings
Fig. 1 is the theory diagram of testing bench frame control system for open type internal combustion engine;
Fig. 2 is the schematic diagram of communication module;
Fig. 3 is the bus circuit figure of high-speed CAN isolator drive device and composition;
Fig. 4 is the schematic diagram of radio frequency radiating circuit;
Fig. 5 is RS485 telecommunication circuit figure;
Fig. 6 is RS232 telecommunication circuit figure;
Fig. 7 is an intelligent protocol converter CAN232MB connection layout;
Fig. 8 is an intelligent protocol converter CAN485MB connection layout;
Fig. 9 is a radio data-transmission equipment ZWG-23C connection layout;
Figure 10 is the circuit block diagram of radio data-transmission equipment ZWG-23C.
Embodiment
Fig. 1 is the theory diagram of testing bench frame control system for open type internal combustion engine, comprise host computer, communication module, CAN232MB module, CAN485MB module, DTU radio data-transmission equipment (ZWG-23C), FST3 series and FST2 series the electric eddy current dynamometer TT﹠C system, with the relevant peripheral hardware of experiment for example fuel consumption meter, torque gauge, flowmeter, radio transmission module etc., have 485 networks of 485 Communications Interface Units composition.
Host computer is connected on the communication module interface by the CAN232MB module with the peripheral hardware with 232 communication interfaces, 485 networks are connected on the communication module interface by the CAN485MB module, the electric eddy current dynamometer TT﹠C system of FST2 series is connected on the communication module interface by CAN232MB module and CAN485MB module, the electric eddy current dynamometer TT﹠C system of FST3 series and DTU radio data-transmission equipment (ZWG-23C) directly are connected on the communication module interface by the CAN communication interface of self, communicate by the CAN bus protocol between them, constituted internal combustion engine stand TT﹠C system jointly; Described communication module is isolated output, coding chip PT2262 and radio-frequency (RF) radio transmitter module F05P-433M by digital signal controller DSPIC30F6014A, high-speed CAN isolator controller CTM1050T, MAX485 chip, MAX232 chip, six road photoelectricity and is constituted.
Shown in Figure 2 is the circuit theory diagrams of communication module, comprises digital signal controller DSPIC30F6014A, high-speed CAN isolator drive device CTM1050T, MAX232 chip, MX485 chip, is the radio-frequency (RF) radio radiating circuit of core, is six road photoelectricity isolation output of core composition with 6 optocouplers with coding chip PT2262, radio-frequency (RF) radio transmitter module F05P-433M.
Digital signal processor DSP IC30F6014A is by CAN1 interface pin C1RX, C1TX respectively with the RXD (4 pin) of high-speed CAN isolator drive device CTM1050T, TXD (3 pin) links to each other, the pin CANH of CTM1050T (6 pin), CANL (7 pin), CANG (8 pin) respectively with the pin 2 of DB9 interface socket, pin 7, pin 3 links to each other, number according to the needs DB9 interface socket of peripherals can expand to 110, the positive pole of the power supply of the pin VDD of CTM1050T (1 pin) 5V, GND (5 pin) ground connection, therefore the equipment with CAN network interface all can be received on the communication module by the DB9 interface socket, transmits swap data mutually by the CAN bus communication protocol.
The pin IC8/CN21/RD15 of digital signal processor DSP IC30F6014A (38 pin) connects the pin 2 of MAX485, pin 3, the pin 2 of MAX485, pin 3 is connected together, the pin U2RX of DSPIC30F6014A (39 pin), U2TX (40 pin) connects the pin 1 of MAX485 respectively, pin 4,8 pin of MAX485 connect the positive pole of 5V power supply, 5 pin ground connection, the pin 485+ of MAX485 (6 pin), pin 485-(7 pin) respectively with the pin 1 of a DB9 interface socket, pin 2 links to each other, the pin 5 of MAX485 connects the pin 5 of DB9 interface socket, they constitute 485 telecommunication circuits together, therefore the equipment with 485 network interfaces all can be received on the communication module by the DB9 interface socket, transmits swap data mutually by 485 communication protocols.
The pin U1RX of digital signal processor DSP IC30F6014A (42 pin), pin U1TX (41 pin) connects respectively and meets the pin R20UT (9 pin) of MAX232 behind the resistance, pin T2IN (10 pin), between the pin V+ of MAX232 (2 pin) and the pin VDD (16 pin), between pin V-(6 pin) and the pin VSS (15 pin) respectively and connect an electric capacity, connect the 5V power supply between the pin VDD of MAX232 (16 pin) and the pin VSS (15 pin), the pin T20UT of MAX232 (7 pin), pin R2IN (8 pin) connects respectively and connects the pin 3 of a DB9 interface socket behind the resistance, pin 2, pin 5 ground connection of DB9 interface socket, they constitute 232 telecommunication circuits together, therefore the equipment with 232 network interfaces all can be received on the communication module by the DB9 interface socket, transmits swap data mutually by 232 communication protocols.
Connect the pin 2 of an optocoupler behind resistance of the pin IC5/RD12 of digital signal processor DSP IC30F6014A (64 pin) series connection, the pin 1 of optocoupler connects the positive pole of 5V power supply, between the pin 8 of optocoupler and the pin 6 and connect a resistance, pin 6 ground connection of optocoupler, connect the positive pole of 12V power supply behind resistance of pin 7 series connection of optocoupler, the pin 7 of optocoupler connects output terminal; The pin 0C4/RD3 of digital signal processor DSP IC30F6014A (63 pin), pin 0C3/RD2 (62 pin), pin EMUD2/OC2/RD1 (61 pin), pin EMUC2/OC1/RD0 (58 pin), pin IC4/RD11 (57 pin) all adopt five optocouplers of above-mentioned mode and other to link to each other, and they constitute six road photoelectricity together and isolate output.
The pin AN3 of digital signal processor DSP IC30F6014A (17 pin), AN4 (16 pin), AN5 (15 pin), AN6 (21 pin), AN7 (22 pin), AN8 (27 pin), AN9 (28 pin) meets the pin A6 (7 pin) of coding chip PT2262 respectively, A7 (8 pin), A8 (10 pin), A9 (11 pin), A11 (12 pin), A12 (13 pin), TE (14 pin), the pin AN10 of DSPIC30F6014A (29 pin), AN11 (30 pin), AN12 (33 pin), AN13 (34 pin), AN14 (35 pin), AN15 (36 pin) respectively with the pin A0 (1 pin) that meets coding chip PT2262 after the corresponding pin of jumper wire device is connected, A1 (2 pin), A2 (3 pin), A3 (4 pin), A4 (5 pin), A5 (6 pin), the pin Vcc of PT2262 (18 pin) connects the positive pole of 5V power supply, pin Vss (9 pin) ground connection, the pin Dout of PT2262 (17 pin) meets the pin Din (3 pin) of radio-frequency (RF) radio transmitter module F05P-433M, pin VDD (1 pin) connects the positive pole of 5V power supply, pin Vss (2 pin) ground connection, pin Vout connects antenna.
That shown in Figure 3 is the bus circuit figure of high-speed CAN isolator drive device and composition, digital signal processor DSP IC30F6014A is by CAN1 interface pin C1RX, C1TX respectively with the pin RXD of high-speed CAN isolator drive device CTM1050T, TXD links to each other, the pin CANH of high-speed CAN isolator drive device CTM1050T, CANL, CANG respectively with the pin 2 of DB9 interface socket, pin 7, pin 3 links to each other, the pin CANG ground connection of high-speed CAN isolator drive device CTM1050T, the equipment of all CAN communications, instrument, instrument, module can hang over by the DB9 interface of standard on the CAN bus, each peripherals instrument and meter and module are exactly the node of CAN, allow 110 nodes at most; Traditional RS232 and RS485 communication modes can convert the CAN agreement communication modes of standard by CAN232MB and CAN485MB to, and each equipment with 232 and 485 network interfaces just can be used as an independent CAN node and uses like this; CAN belongs to the category of fieldbus, it is the serial communication network of distributed control of a kind of effective support or real-time control, than the dcs of present many RS-485 based on R line structure, dcs based on the CAN bus has obvious superiority in the following areas: high-speed CAN isolator drive device CTM1050T works in many master modes, each node in the network all can adopt the mode of arbitration by turn of no damage structure to compete to bus according to bus access right of priority (depending on message identifier) and send data, and the CAN compromise annulment station address coding, and replace communication data is encoded, this can make different nodes receive identical data simultaneously; The CAN bus links to each other with physical bus with CANL by two output terminal CANH of high-speed CAN isolator drive device chip CTM1050T, and the state of output terminal CANH can only be high level or suspended state, output terminal CANL can only be low level or suspended state, this just guarantees can not go out phenomenon in the RS-485 network, when system wrong, multinode appears simultaneously when bus sends data, cause bus to present short circuit, thereby damage the phenomenon of some node, and the CAN node has under wrong serious situation and closes output function automatically, so that the operation of other nodes is unaffected on the bus, thereby guarantee can not go out phenomenon in network, because of individual nodes goes wrong, make bus be in " deadlock " state, and the perfect communication protocol that CAN has can be realized by CAN controller chip and interface chip thereof.
Shown in Figure 4 is the schematic diagram of radio frequency radiating circuit, and it comprises coding chip PT2262 and radio-frequency (RF) radio transmitter module; The AN3 of digital signal controller DSPIC30F6014A (17 pin), AN4 (16 pin), AN5 (15 pin), AN6 (21 pin), AN7 (22 pin), AN8 (27 pin), AN9 (28 pin) meets the A6 (7 pin) of coding chip PT2262 respectively, A7 (8 pin), A8 (10 pin), A9 (11 pin), A11 (12 pin), A12 (13 pin), TE (14 pin), the pin AN10 of DSPIC30F6014A (29 pin), AN11 (30 pin), AN12 (33 pin), AN13 (34 pin), AN14 (35 pin), AN15 (36 pin) respectively with the pin A0 (1 pin) that meets coding chip PT2262 after the corresponding pin of jumper wire device is connected, A1 (2 pin), A2 (3 pin), A3 (4 pin), A4 (5 pin), A5 (6 pin), the pin 17 of coding chip PT2262 connects the input pin of radio-frequency (RF) radio transmitter module, and the output pin of radio-frequency (RF) radio transmitter module connects antenna; Coding chip PT2262 at most can (the three-state address end pin of A0～A11) be (unsettled by 12, connect high level, connecing low level) combination in any provides 531441 address codes, coding chip PT2262 can have 6 (data terminal pins of D0～D5) at most, address code of setting and numeric data code are from the pin 17 serials output of coding chip PT2262, can be used for the wireless remote control radiating circuit, the coded signal that coding chip PT2262 sends is formed a complete code word by address code, numeric data code, synchronous code, if transmitting terminal presses ﹠ hold always, coding chip is emission continuously; When transmitter does not have button to press, coding chip PT2262 disconnects power supply, its pin 17 is a low level, so the high frequency transmission circuit of 433MHz is not worked, when button is pressed, coding chip PT2262 gets electric work, the modulated serial data signal of its pin 17 outputs, when pin 17 is the high frequency transmission circuit starting of oscillation of 433MHz between high period and launches the constant amplitude high-frequency signal, the high frequency transmission circuit failure of oscillations of 433MHz during pin 17 is for low putting down, so high frequency transmission circuit is controlled by the digital signal of pin 17 output of coding chip PT2262 fully, to be equivalent to degree of modulation be 100% amplitude modulation thereby high-frequency circuit is finished amplitude keying (ASK modulation); The numeric data code that the AN3 of work hours word signal controller DSPIC30F6014A～output of AN8 pin is set, the address code that AN10～output of AN15 pin is set, coding chip PT2262 encodes in view of the above, from pin 17 outputs, remove to control wireless radiofrequency transmitter module F05P-433M and from antenna, information is transmitted to receiving end then.
Wireless radiofrequency transmitter module F05P-433M adopts SMT technology, resin-encapsulated, small size, the frequency stabilization of sound table, inside has one-level modulation circuit and current-limiting resistance, is fit to short-distance wireless tele-alarm and single-chip microcomputer wireless data transmission, wireless radiofrequency transmitter module F05P-433M has the operating voltage range and the low-power consumption characteristic of broad, 4 function pins are arranged, and volume is little, and the ASK mode is modulated; Wireless radiofrequency transmitter module F05P-433M need import data and could launch, and data-signal stops, and transmitter current is zero; Wireless radiofrequency transmitter module F05P-433M is more satisfactory to the data pulse launching effect of 0.1-1ms, and wide narrow pulse meeting causes that modulation efficiency descends, and ovennodulation or undermodulation make reception and transmission range become near; Wireless radiofrequency transmitter module F05P-433M can not launch DC level and simulating signal; And how no matter the data of coding chip PT2262 become but pulsewidth is constant, even a bit paroxysmal external interference occurs, and the tolerance of the demoder output high level of also can decoding; The length of antenna is got 24 centimetres in the enforcement, and with the enameled wire replacement of diameter 0.5-1 millimeter, directly transmitting range is 250 meters.
That shown in Figure 5 is RS485 telecommunication circuit figure, comprise 485 communication chips, the DB9 interface socket, the pin 1 of 485 communication chips connects the pin 39 (U2RX/CN17/RF4) of digital signal controller DSPIC30F6014A, the pin 2 of 485 communication chips, 4 pin that 3 link together connects pin (IC8/CN21/RD15) 485 communication chips of digital signal controller DSPIC30F6014A connect 40 pin (U2TX/CN18/RF5) of digital signal controller DSPIC30F6014A, 6 pin (485+) of 485 communication chips connect the pin 1 of DB9 interface socket, 7 pin (485-) of 485 communication chips connect 5 pin of pin 2,485 communication chips of DB9 interface socket and the pin 5 of DB9 interface socket meets GND; The RS485 network also can insert by the DB9 plugs and sockets of standard, carries out communication with communication module easily.
That shown in Figure 6 is RS232 telecommunication circuit figure, comprises 232 communication chips, the DB9 interface socket; The pin of 232 communication chips (T20UT) 7 pin, (R2IN) 8 pin link to each other with 2,3 pin of DB9 communication interface respectively, the pin 9 (T2IN) of 232 communication chips, pin 10 (R20UT) link to each other with pin U1TX, the pin U1RX of digital signal controller DSPIC30F6014A asynchronous serial communication (UART) interface respectively, host computer with RS232 communication interface also can communicate by this circuit, realizes the exchange of data.
The connection layout of Fig. 7 intelligent protocol converter CAN232MB, comprise intelligent protocol converter CAN232MB, have the equipment of 232 communication interfaces such as host computer, large-size screen monitors wireless communication module, the pin RX of the RS232 mouth of intelligent protocol converter CAN232MB connects the TX end that is connect equipment 232 communication interfaces, and the pin TX of intelligent protocol converter CAN232MB connects the RX end that is connect equipment 232 communication interfaces; The built-in modular converter of CAN232MB becomes the CAN agreement to 232 protocol conversions, and the communication interface output of CAN232MB is received on the communication module.
The connection layout of Fig. 8 intelligent protocol converter CAN485MB, the equipment such as the instrument and meter that comprise intelligent protocol converter CAN485MB, have 485 communication interfaces, the pin 485+ of the RS485 interface of intelligent protocol converter CAN485MB meets the pin 485+ of the equipment that connect, the pin 485-of the RS485 interface of intelligent protocol converter CAN485MB meets the pin 485-of the equipment that connect, the built-in modular converter of intelligent protocol converter CAN485MB becomes the CAN agreement to 485 protocol conversions, and the communication interface output of CAN232MB is received on the communication module.
Shown in Figure 9 is the connection layout of radio data-transmission equipment, comprise a ZWG-23C module, this module belongs to GPRS DTU radio data-transmission equipment, be intelligent protocol converter, it is a kind of wireless data transmission module, this module is used to carry out the networking data transmission, and its pin CANH, CANL meet pin CANH, the CANL of high-speed CAN isolator drive device CTM1050T respectively.
Shown in Figure 10 is the circuit block diagram of radio data-transmission equipment ZWG-23C, comprise a power supervisor that connects 3.8V～4.5V stabilized voltage supply, the CPU processor, the GPRS module, the device security supervising device, radio data-transmission equipment WG-23C is by the pin CANH of the CAN communication interface of self, CANL meets the pin CANH (6 pin) of high-speed CAN isolator drive device CTM1050T respectively, CANL (7 pin), digital signal controller DSPIC30F6014A or host computer are by the CAN bus, send the data to radio data-transmission equipment ZWG-23C, after radio data-transmission equipment ZWG-23C receives data, processing through the CPU processor, data after will handling by its inner GPRS module send to receiving terminal by GPRS network, GPRS network can be connected with the Internet net easily simultaneously, thereby realizes remote monitoring; Managerial personnel can also be configured and wake up ZWG-23C by phone and note, and built-in SIM card connects GPRS network, and can store data in real time.
The technical program can be utilized its CAN interface, by driver CTM1050T, asynchronous serial communication interface, CAN485MB, CAN232MB, MAX485, each testing tool that communication modules such as MAX322 are essential with stand, instrument, external control equipment is connected as a single entity, form 110 nodes with the interior open platform system of many principal points, by radio data-transmission equipment DTU and transmitter module, by mobile telephone network and internet, realize wireless data sending and the transmission of test figure wireless data between the stand arrangement, can accomplish portable, the part wireless connections, can hold various peripheral hardwares, realize that the data long distance transmits and control, form real open bench test system.
Claims (3)
1. testing bench frame control system for open type internal combustion engine, it is characterized in that: this system is reached and the supporting input-output device of host computer by host computer, communication module, intelligence communication protocol conversion module CAN232MB and CAN485MB, FTS3 series electric eddy current dynamometer numeral TT﹠C system and FST2 series electric eddy current dynamometer TT﹠C system, the DTU radio data-transmission equipment, 485 networks that carry 232 mouthful peripheral hardware and the equipment that uses 485 communication modes be made of relevant with test constitute, described communication module communicates with CAN bus communication mode and all devices that is connected to above it, the DTU radio data-transmission equipment is directly linked to each other with the CAN mouth of communication module by the CAN mouth that carries respectively with FTS3 series electric eddy current dynamometer numeral TT﹠C system, host computer carries 232 mouthfuls peripheral hardware by 232 mouthfuls that carry 232 mouthfuls of meeting intelligence communication protocol conversion module CAN232MB with relevant with test, CAN mouth through intelligence communication protocol conversion module CAN232MB links to each other with the CAN mouth of communication module, 485 networks of being made up of the equipment that uses 485 communication modes are by 485 mouthfuls that carry 485 mouthfuls of meeting intelligence communication protocol conversion module CAN485MB, through the CAN mouth of the intelligence communication protocol conversion module CAN485MB communication module that links to each other with the CAN mouth of communication module, FST2 series electric eddy current dynamometer TT﹠C system by carry 232,485 mouthfuls of 232 mouthfuls and 485 mouthfuls of CAN485MB that meet intelligence communication protocol conversion module CAN232MB respectively, the CAN mouth through intelligence communication protocol conversion module CAN232MB and CAN485MB links to each other with the CAN mouth of communication module respectively.
2. a kind of testing bench frame control system for open type internal combustion engine according to claim 1 is characterized in that: described communication module is to isolate output by digital signal controller DSPIC30F6014A with the high-speed CAN driver for isolating CTM1050T that links to each other with it, radio frequency radiating circuit, RS232 chip, RS485 chip, six road photoelectricity to constitute.
3. a kind of testing bench frame control system for open type internal combustion engine according to claim 2, it is characterized in that: pin RXD, the TXD of described high-speed CAN driver for isolating CTM1050T meet pin C1RX, the C1TX of digital signal controller respectively, and pin CANH, the CANL of CTM1050T and CANG link to each other with 3 pins on the interface socket respectively.
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| CN2008101413472A CN101368876B (en) | 2008-09-11 | 2008-09-11 | Testing bench frame control system for open type internal combustion engine |
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| CN2008101413472A CN101368876B (en) | 2008-09-11 | 2008-09-11 | Testing bench frame control system for open type internal combustion engine |
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