CN203217563U - CAN bus control transceiver system with high isolation performance - Google Patents

CAN bus control transceiver system with high isolation performance Download PDF

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CN203217563U
CN203217563U CN201320199552.0U CN201320199552U CN203217563U CN 203217563 U CN203217563 U CN 203217563U CN 201320199552 U CN201320199552 U CN 201320199552U CN 203217563 U CN203217563 U CN 203217563U
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digital conversion
photoelectric isolation
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贾文良
施东庆
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Abstract

The utility model relates to a CAN bus control and transmit-receive system with high isolation performance, and solve the problems that the cost for sharing data among devices is too high and the isolation performance is poor. The technical scheme of the CAN bus control and transmit-receive system is characterized in that a power module supplies power for the system, and the system comprises a plurality of sensors, a simulation signal interface module, an analog-to-digital conversion module, a microprocessor, a CAN control module, a CAN transmit-receive module, a first photoelectric isolation module, a second photoelectric isolation module and the CAN bus, wherein an output end of the CAN control module is connected with an input end of the first photoelectric isolation module; an output end of the second photoelectric isolation module is connected with an input end of the CAN transmit-receive module; an input end of the CAN control module is connected with an output end of the second photoelectric isolation module; an input end of the second photoelectric isolation module is connected with an output end of the CAN transmit-receive module; and driving ends of the first photoelectric isolation module and the second photoelectric isolation module are connected with the power module. The CAN bus control and transmit-receive system has better isolation performance.

Description

The total line traffic control receive-transmit system of the CAN of high isolation performance
Technical field
The utility model is a kind of CAN Bus Transmit-receive System, particularly relates to a kind of total line traffic control receive-transmit system of CAN of high isolation performance.
Background technology
CAN is controller local area network's (Controller Area Network, what abbreviation CAN) was by research and development and the German BOSCH company that produces that automobile electronics are celebrated has developed, and finally become international standard.It is one of most widely used fieldbus in the world.In North America and West Europe, the CAN bus protocol has become the STD bus of Computer Controlled System for Vehicle and built-in industrial control area net, and to have with CAN be the J1939 agreement that underlying protocol aims at the design of high capacity waggon and heavy industry motor vehicles and machines.In recent years, the high reliability that it has and good error detection capability come into one's own, and are widely used in that Computer Controlled System for Vehicle and environment temperature are abominable, electromagnetic radiation is strong and vibrates big industrial environment.In many commercial Application, often need the simulating signal of multiple sensor is carried out analyzing and processing; Simultaneously, the result of analyzing and processing often needs to provide data message to other equipment in the system.Exploitation is a kind of like this can handle the multiple sensor signal simultaneously and realize that the system of a plurality of equipment room data sharings is just necessary.
Chinese patent publication number: 202351638U, open day on July 25th, 2012, a kind of data acquisition unit based on the CAN bus is disclosed, it is characterized in that, comprise PC, with CANBus communications adapter, CAN bus and the CAN intelligence communication node of PC interface, PC is communicated by letter with each CAN intelligent node with the CAN bus by the CANBus communications adapter, also can realize transmission and the control of data between each CAN intelligent node.This technical scheme needs stronger equipment support, and is very high for cost requirement, too high for realizing the cost price that a plurality of equipment room data sharings pay, simultaneously for the isolation of electric signal also imperfection.
The utility model content
The purpose of this utility model is to exist for and realize that an equipment room data sharing cost is too high, isolation is bad, can't realize miniaturization for solving present technical scheme, can't carry out the problem of data sharing when perhaps working, a kind of total line traffic control receive-transmit system of CAN of high isolation performance is provided.
The technical scheme that its technical matters that solves the utility model adopts is: the total line traffic control receive-transmit system of a kind of CAN of high isolation performance, powered by power module, comprise several sensors, the analog signal interface module, analog-to-digital conversion module, microprocessor, the CAN control module, the CAN transceiver module, first photoelectric isolation module, second photoelectric isolation module and CAN bus, all sensor output terminals are electrically connected with described analog signal interface module, the output terminal of analog signal interface module is connected with described microprocessor by analog-to-digital conversion module, described output end of microprocessor is electrically connected with described CAN control module, the output terminal of described CAN control module is connected with the input end of first photoelectric isolation module, the output terminal of first photoelectric isolation module is connected with the input end of CAN transceiver module, the input end of described CAN control module is connected with the output terminal of second photoelectric isolation module, the input end of second photoelectric isolation module is connected with the output terminal of CAN transceiver module, and the drive end of first photoelectric isolation module and second photoelectric isolation module is connected with described power module.The utility model has good isolation performance by optocoupler, the utility model multichannel analog signals inserts by the multiple sensor interface module, multichannel analog signals converts the multi-path digital signal to by the high-speed digital-analog modular converter, trigger microprocessor to the computing of corresponding input by modes such as external interrupt, inquiries, result of calculation can send on the CAN bus by the total line traffic control of CAN and transmitting-receiving model, thereby realize in the CAN fieldbus an independently node, support the input of multiple sensor signal and handle.
As preferably, also comprise the usb communication module, described usb communication module is electrically connected with described microprocessor.The digital communication of the utility model support USB mode etc.
As preferably, also comprise the RS232 communication module, described RS232 communication module is electrically connected with described microprocessor.The digital communication of the utility model support RS232 mode etc.
As preferably, described analog-to-digital conversion module is the high speed analog-to-digital conversion module.
As preferably, described microprocessor is the 89C52 single-chip microcomputer, described high speed analog-to-digital conversion module comprises modulus conversion chip ADC0808, capacitor C 7, the IN0 mouth of described modulus conversion chip ADC0808, the IN1 mouth is connected with the output terminal of analog signal interface module respectively with the IN2 mouth, the VCC mouth of described modulus conversion chip ADC0808 and VREF mouth are all by described capacitor C 7 ground connection, the GND mouth of modulus conversion chip ADC0808 and VREF-mouth ground connection, described ADDC mouth is ground connection also, and the delivery outlet of modulus conversion chip ADC0808 is connected with the input/output port of 89C52 single-chip microcomputer.The utility model adopts common 89C52 single-chip microcomputer, and simple in structure, cost is lower, and power consumption is also little, adopts ADC0808 also to be because this connection can realize analog to digital conversion at a high speed.
As preferably, the control chip in the described CAN control module is the SJA1000 chip, and described 89C52 single-chip microcomputer adopts the 11.0592M crystal oscillator, and described SJA1000 chip adopts the 16M crystal oscillator.The utility model has adopted the twin crystal corresponding different chip that shakes, and has adopted different crystal oscillators to give different chips, can not cause mutual interference and error.
As preferably, the CAN transceiver module comprises interface J1, diode D1, diode D2, capacitor C 4, capacitor C 5, resistance R 16, capacitor C 4, capacitor C 5 and jumper switch S6, one end of described jumper switch is connected with the CANL mouth of interface J1, the other end of jumper switch is connected with the CANH mouth of interface J1 by resistance R 16, the CANH mouth of described interface J1 passes through the diode D1 ground connection of capacitor C 4 and reversal connection respectively, by the diode D2 ground connection of capacitor C 5 and reversal connection, the CANL mouth of described interface J1 also is connected with described CAN control module with the CANH mouth CANL mouth of described interface J1 respectively.The setting of jumper switch S6 and resistance R 16, can be so that the utility model be applicable to multiple CAN bus, if the interface of CAN bus own carries terminal resistance, then can open jumper switch S6 is suitable for, if the interface of CAN bus own then can be suitable for by closed jumper switch S6 from tape terminal resistance not.
As preferably, also comprise indicating circuit, described indicating circuit comprises resistance R 12, resistance R 13, light emitting diode D3 and light emitting diode D4, the negative electrode of described light emitting diode D3 is connected with the P31 mouth of 89C52 single-chip microcomputer, the anode of described light emitting diode D3 connects power module by resistance R 12, the negative electrode of described light emitting diode D4 is connected with the P30 mouth of 89C52 single-chip microcomputer, and the anode of described light emitting diode D4 connects power module by resistance R 13.
Substantial effect of the present utility model is: the utility model is simple in structure, easy to use, cost is lower, triggers microprocessor to the computing of corresponding input by modes such as external interrupt, inquiries, can realize a plurality of equipment room data sharings fast, and isolation is preferably arranged.
Description of drawings
Fig. 1 is a kind of schematic block circuit diagram of the present utility model;
Fig. 2 is a kind of circuit diagram of the utility model high speed analog-to-digital conversion module;
Fig. 3 is a kind of circuit theory synoptic diagram that microprocessor is connected with the high speed analog-to-digital conversion module in the utility model;
Fig. 4 is a kind of circuit theory synoptic diagram of CAN transceiver module in the utility model;
Fig. 5 is a kind of circuit theory diagrams of indicating circuit in the utility model;
Fig. 6 is a kind of circuit theory diagrams of first photoisolator and CAN transceiver module in the utility model.
Among the figure: 1, sensor, 2, analog signal interface module, 3, the high speed analog-to-digital conversion module, 4, microprocessor, 5, usb communication module, 6, RS232 communication module, 7, the CAN control module, 8, the CAN transceiver module, 9, CAN bus, 10, first photoelectric isolation module, 11, second photoelectric isolation module, 12, power module.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
The total line traffic control receive-transmit system of a kind of CAN of high isolation performance (referring to accompanying drawing 1), powered by power module, comprise two sensors 1, analog signal interface module 2, high speed analog-to-digital conversion module 3, microprocessor 4, CAN control module 7, CAN transceiver module 8, first photoelectric isolation module 10, second photoelectric isolation module 11 and CAN bus 9, all sensor output terminals are electrically connected with described analog signal interface module, the output terminal of analog signal interface module is connected with described microprocessor by analog-to-digital conversion module, described output end of microprocessor is electrically connected with described CAN control module, the output terminal of described CAN control module (referring to accompanying drawing 6) is connected with the input end of first photoelectric isolation module, the output terminal of first photoelectric isolation module is connected with the input end of CAN transceiver module, the input end of described CAN control module is connected with the output terminal of second photoelectric isolation module, the input end of second photoelectric isolation module is connected with the output terminal of CAN transceiver module, and the drive end of first photoelectric isolation module and second photoelectric isolation module is connected with described power module.First photoelectric isolation module and second photoelectric isolation module all adopt the 6N137 chip.Present embodiment also comprises usb communication module 5, RS232 communication module 6, and described usb communication module is electrically connected with described microprocessor.Described RS232 communication module is electrically connected with described microprocessor.Described analog-to-digital conversion module is the high speed analog-to-digital conversion module.Described microprocessor is the 89C52 single-chip microcomputer, described high speed analog-to-digital conversion module is (referring to accompanying drawing 2, accompanying drawing 3) comprises modulus conversion chip ADC0808, capacitor C 7, the IN0 mouth of described modulus conversion chip ADC0808, the IN1 mouth is connected with the output terminal of analog signal interface module respectively with the IN2 mouth, the VCC mouth of described modulus conversion chip ADC0808 and VREF mouth are all by described capacitor C 7 ground connection, the GND mouth of modulus conversion chip ADC0808 and VREF-mouth ground connection, described ADDC mouth is ground connection also, and the delivery outlet of modulus conversion chip ADC0808 is connected with the input/output port of 89C52 single-chip microcomputer.Control chip in the described CAN control module is the SJA1000 chip, and described 89C52 single-chip microcomputer adopts the 11.0592M crystal oscillator, and described SJA1000 chip adopts the 16M crystal oscillator.CAN transceiver module (referring to accompanying drawing 4) comprises interface J1, diode D1, diode D2, capacitor C 4, capacitor C 5, resistance R 16, capacitor C 4, capacitor C 5 and jumper switch S6, one end of described jumper switch is connected with the CANL mouth of interface J1, the other end of jumper switch is connected with the CANH mouth of interface J1 by resistance R 16, the CANH mouth of described interface J1 passes through the diode D1 ground connection of capacitor C 4 and reversal connection respectively, by the diode D2 ground connection of capacitor C 5 and reversal connection, the CANL mouth of described interface J1 also is connected with described CAN control module with the CANH mouth CANL mouth of described interface J1 respectively.Also comprise indicating circuit, described indicating circuit (referring to accompanying drawing 5) comprises resistance R 12, resistance R 13, light emitting diode D3 and light emitting diode D4, the negative electrode of described light emitting diode D3 is connected with the P31 mouth of 89C52 single-chip microcomputer, the anode of described light emitting diode D3 connects power module by resistance R 12, the negative electrode of described light emitting diode D4 is connected with the P30 mouth of 89C52 single-chip microcomputer, and the anode of described light emitting diode D4 connects power module by resistance R 13.
Above-described embodiment is a kind of preferable scheme of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.

Claims (8)

1.一种高隔离性能的CAN总线控制收发系统，由电源模块供电，其特征在于：包括若干个传感器、模拟信号接口模块、模数转换模块、微处理器、CAN控制模块、CAN收发模块、第一光电隔离模块、第二光电隔离模块和CAN总线，所有的传感器输出端与所述的模拟信号接口模块电连接，模拟信号接口模块的输出端通过模数转换模块与所述的微处理器连接，所述的微处理器输出端与所述的CAN控制模块电连接，所述的CAN控制模块的输出端与第一光电隔离模块的输入端连接，第一光电隔离模块的输出端与CAN收发模块的输入端连接，所述的CAN控制模块的输入端与第二光电隔离模块的输出端连接，第二光电隔离模块的输入端与CAN收发模块的输出端连接，第一光电隔离模块和第二光电隔离模块的驱动端与所述的电源模块连接。  1. A CAN bus control transceiver system with high isolation performance is powered by a power supply module, and is characterized in that it includes several sensors, an analog signal interface module, an analog-to-digital conversion module, a microprocessor, a CAN control module, a CAN transceiver module, The first photoelectric isolation module, the second photoelectric isolation module and the CAN bus, all sensor output terminals are electrically connected to the analog signal interface module, and the output terminals of the analog signal interface module are connected to the microprocessor through an analog-to-digital conversion module connected, the output of the microprocessor is electrically connected to the CAN control module, the output of the CAN control module is connected to the input of the first photoelectric isolation module, and the output of the first photoelectric isolation module is connected to the CAN The input terminal of the transceiver module is connected, the input terminal of the CAN control module is connected with the output terminal of the second photoelectric isolation module, the input terminal of the second photoelectric isolation module is connected with the output terminal of the CAN transceiver module, the first photoelectric isolation module and The driving end of the second photoelectric isolation module is connected to the power module. the 2.根据权利要求1所述的高隔离性能的CAN总线控制收发系统，其特征在于：还包括USB通信模块，所述的USB通信模块与所述的微处理器电连接。 2. The CAN bus control transceiver system with high isolation performance according to claim 1, characterized in that: it also includes a USB communication module, and the USB communication module is electrically connected with the microprocessor. 3.根据权利要求1所述的高隔离性能的CAN总线控制收发系统，其特征在于：还包括RS232通信模块，所述的RS232通信模块与所述的微处理器电连接。 3. The CAN bus control transceiver system with high isolation performance according to claim 1, characterized in that: it also includes an RS232 communication module, and the RS232 communication module is electrically connected to the microprocessor. 4.根据权利要求1或2或3所述的高隔离性能的CAN总线控制收发系统，其特征在于：所述的模数转换模块为高速模数转换模块。 4. The CAN bus control transceiver system with high isolation performance according to claim 1, 2 or 3, characterized in that: the analog-to-digital conversion module is a high-speed analog-to-digital conversion module. 5.根据权利要求4所述的高隔离性能的CAN总线控制收发系统，其特征在于：所述的微处理器为89C52单片机，所述的高速模数转换模块包括模数转换芯片ADC0808、电容C7，所述模数转换芯片ADC0808的IN0口、IN1口和IN2口分别与模拟信号接口模块的输出端连接，所述模数转换芯片ADC0808的VCC口和VREF口均通过所述的电容C7接地，模数转换芯片ADC0808的GND口和VREF-口接地，所述的ADDC口也接地，模数转换芯片ADC0808的输出口与89C52单片机的输入输出口连接。 5. the CAN bus control transceiver system of high isolation performance according to claim 4, is characterized in that: described microprocessor is 89C52 single-chip microcomputer, and described high-speed analog-to-digital conversion module comprises analog-to-digital conversion chip ADC0808, electric capacity C7 , the IN0 port, the IN1 port and the IN2 port of the analog-to-digital conversion chip ADC0808 are respectively connected to the output terminals of the analog signal interface module, and the VCC port and the VREF port of the analog-to-digital conversion chip ADC0808 are grounded through the capacitor C7, The GND port and the VREF- port of the analog-to-digital conversion chip ADC0808 are grounded, and the ADDC port is also grounded, and the output port of the analog-to-digital conversion chip ADC0808 is connected to the input and output ports of the 89C52 single-chip microcomputer. 6.根据权利要求5所述的高隔离性能的CAN总线控制收发系统，其特征在于：所述的CAN控制模块中的控制芯片为SJA1000芯片，所述89C52单片机采用11.0592M晶振，所述SJA1000芯片采用16M晶振。 6. The CAN bus control transceiver system with high isolation performance according to claim 5 is characterized in that: the control chip in the CAN control module is a SJA1000 chip, and the 89C52 single-chip microcomputer adopts a 11.0592M crystal oscillator, and the SJA1000 chip Using 16M crystal oscillator. 7.根据权利要求5所述的高隔离性能的CAN总线控制收发系统，其特征在于：CAN收发模块包括接口J1、二极管D1、二极管D2、电容C4、电容C5、电阻R16、电容C4、电容C5和跳线开关S6，所述跳线开关的一端与接口J1的CANL口连接，跳线开关的另一端通过电阻R16与接口J1的CANH口连接，所述接口J1的CANH口分别通过电容C4和反接的二极管D1接地，所述接口J1的CANL口分别通过电容C5和反接的二极管D2接地，所述接口J1的CANL口和CANH口还与所述的CAN控制模块连接。 7. The CAN bus control transceiver system with high isolation performance according to claim 5, characterized in that: CAN transceiver module includes interface J1, diode D1, diode D2, capacitor C4, capacitor C5, resistor R16, capacitor C4, capacitor C5 and a jumper switch S6, one end of the jumper switch is connected to the CANL port of the interface J1, the other end of the jumper switch is connected to the CANH port of the interface J1 through a resistor R16, and the CANH port of the interface J1 is respectively connected through a capacitor C4 and The reversed diode D1 is grounded, the CANL port of the interface J1 is grounded through the capacitor C5 and the reversed diode D2 respectively, and the CANL port and the CANH port of the interface J1 are also connected to the CAN control module. 8.根据权利要求5所述的高隔离性能的CAN总线控制收发系统，其特征在于：还包括指示电路，所述的指示电路包括电阻R12、电阻R13、发光二极管D3和发光二极管D4，所述发光二极管D3的阴极与89C52单片机的P31口连接，所述发光二极管D3的阳极通过电阻R12接电源模块，所述发光二极管D4的阴极与89C52单片机的P30口连接，所述发光二极管D4的阳极通过电阻R13接电源模块。 8. The CAN bus control transceiver system with high isolation performance according to claim 5 is characterized in that: it also includes an indicator circuit, and the indicator circuit includes a resistor R12, a resistor R13, a light-emitting diode D3 and a light-emitting diode D4, the The cathode of the light emitting diode D3 is connected to the P31 port of the 89C52 microcontroller, the anode of the light emitting diode D3 is connected to the power module through the resistor R12, the cathode of the light emitting diode D4 is connected to the P30 port of the 89C52 single chip computer, and the anode of the light emitting diode D4 is connected through Resistor R13 is connected to the power module.
CN201320199552.0U 2013-04-19 2013-04-19 CAN bus control transceiver system with high isolation performance Expired - Lifetime CN203217563U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104865938A (en) * 2015-04-03 2015-08-26 深圳市前海安测信息技术有限公司 Node connection chip applied to assess human body injury condition and node network thereof
CN106557050A (en) * 2016-09-27 2017-04-05 无锡小天鹅股份有限公司 Washing machine and its data transmission method, the data signal conditioning device of washing machine
CN107861457A (en) * 2017-11-08 2018-03-30 江苏驷博电气有限公司 Universal logic module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104865938A (en) * 2015-04-03 2015-08-26 深圳市前海安测信息技术有限公司 Node connection chip applied to assess human body injury condition and node network thereof
CN104865938B (en) * 2015-04-03 2017-08-22 深圳市前海安测信息技术有限公司 Applied to the node connection chip and its meshed network for assessing personal injury's situation
CN106557050A (en) * 2016-09-27 2017-04-05 无锡小天鹅股份有限公司 Washing machine and its data transmission method, the data signal conditioning device of washing machine
CN107861457A (en) * 2017-11-08 2018-03-30 江苏驷博电气有限公司 Universal logic module

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Denomination of utility model: CAN (controller area network) bus control and transmit-receive system with high isolation performance

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