CN105222823A - A kind of checkout equipment of integrated form of automobile combination meter - Google Patents
A kind of checkout equipment of integrated form of automobile combination meter Download PDFInfo
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- CN105222823A CN105222823A CN201510641302.1A CN201510641302A CN105222823A CN 105222823 A CN105222823 A CN 105222823A CN 201510641302 A CN201510641302 A CN 201510641302A CN 105222823 A CN105222823 A CN 105222823A
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Abstract
The present invention discloses a kind of checkout equipment of integrated form of automobile combination meter, being integrated in one by the measuring ability of combination instrument of this checkout equipment innovation.Comprise Full Featured automobile-used signal generator, high precision image acquisition system and high performance industrial computer.Full Featured automobile-used signal generator can produce all required signals in testing combination instrument process, comprises primary controller, resistance signal generation unit, on-off model generation unit, frequency signal generation unit, CAN signal generation unit and voltage signal acquisition unit.High-precision image capturing system, for gathering the real-time status information of combination instrument, mainly comprises industrial camera and image algorithm supporting with it.Industrial computer is as the platform running upper computer software.This system has global function, and whether the function detecting combination instrument is fast normal, and automatically generates the function of examining report.
Description
Technical field
The present invention relates to a kind of checkout equipment of integrated form, particularly a kind of checkout equipment of integrated form of automobile combination meter.
Background technology
Automobile combination meter is the interactive interface of people and automobile, for driver provides the required information such as vehicle operating parameter, fault, mileage, is the requisite parts of each automobile.Instrument display directly perceived and attractive in appearance makes to drive still do not ride instead of walk required, and also become a part for comfortable life, the accurate and reliability of Parameter transfer is then directly connected to the safety of running car.Mainly rely on manually for the production testing of automobile combination meter in prior art, and because the error of manual detection method is large, efficiency is low, poor reliability, the quality of automobile combination meter be can not be guaranteed, the needs of manufacturer to combination instrument robotization, production in enormous quantities can not be met.
In view of this, be necessary the checkout equipment of the integrated form that a kind of automobile combination meter is provided, to solve the problem.
Summary of the invention
In order to overcome the deficiency that above-mentioned prior art exists, the object of the present invention is to provide a kind of checkout equipment of integrated form of automobile combination meter, the shortcoming relying on manual detection in operation is detected to solve existing instrument, and the dispersion of meter detection equipment causes the inaccurate problem of testing result, if use the checkout equipment of integrated form, combination instrument testing result is more accurate, and testing process is simpler, and testing result is more clear.
In order to achieve the above object, the technical solution adopted in the present invention is: a kind of checkout equipment of integrated form of automobile combination meter, comprises automobile-used signal generator, image capturing system, industrial computer, it is characterized in that:
Described automobile-used signal generator is integrated form, be encapsulated as general automobile instrument checkout equipment, inside comprises master controller, resistance signal generation unit, on-off model generation unit, frequency signal generation unit, CAN signal generation unit and voltage signal acquisition unit, after master controller receives the signal of host computer transmission, according to the communication protocol formulated, the packet parsing received is ordered for corresponding, control corresponding unit and produce output signal, be transported to combination instrument, the actual signal in simulated automotive driving process; Automobile-used signal generator front panel there are 7 kinds of signaling interfaces, wherein outputing signal interface in 5 is switching value interface, resistance signal interface, pwm signal interface, voltage signal interface, CAN signal interface respectively, and 2 kinds of input signal interfaces are that voltage signal measures input interface, frequency signal measures input interface respectively; Often kind of interface all uses the connector of standard, and each passage corresponding is furnished with pilot lamp, rear panel has 220V AC power interface, power switch, USB interface, RS232 interface;
Described image capturing system, adopts the industrial camera of high definition, according to the image information of specific time acquisition instrument, sends image to industrial computer;
Described industrial computer, run the control software design of supporting exploitation with it, follow agreement in checkout equipment definition, realize the communication between host computer and slave computer, sending controling instruction, to slave computer, exports corresponding signal and drives instrument, controls industrial camera acquisition instrument image, and algorithm process is carried out to the image gathered, finally show testing result.
The checkout equipment of the integrated form of automobile combination meter as above; it is characterized in that: the chip that described master controller adopts is the STM32F103ZET of ST company; master controller receives the protocol massages sent from industrial computer serial ports; and be corresponding control command by packet parsing; control corresponding module and produce corresponding signal; master controller adopts double watchdogs reset circuit; circuit board adopts block design; and adopt different electrical power to power; each module exports and input devises protection circuit, main operation controller UCOS system.
The checkout equipment of the integrated form of automobile combination meter as above, it is characterized in that: described resistance signal generation unit adopts the method for designing of resistor network to produce required resistance signal, resistor network is encoded resistance value by 0.1 by 8421,0.2,0.4, the mode of 0.8 arranges, by relay in parallel with it whether conducting the size of resistance value is set, relay controls its conducting by chip TPIC6B595, master controller controls it by the GPIO signal wire be connected with TPIC6B595 and exports low and high level, drives relay conducting or closedown.
The checkout equipment of the integrated form of automobile combination meter as above, it is characterized in that: described frequency signal generation unit adopts FPGA to produce chip as frequency, master controller sends instruction and leaves storer in by needing the frequency of the frequency signal exported, amplitude, these relevant informations of dutycycle, FPGA reads information in memory, produces waveform.
The checkout equipment of the integrated form of automobile combination meter as above; it is characterized in that: described on-off model generation unit adopts 74HC595 chip that the control signal of master controller is converted to parallel signal; control the turn-on and turn-off of optocoupler; optocoupler adopts the high-power driving optocoupler TPL700 of Toshiba; drive rear class to increase short interruption protection circuit, prevent outside signal shorts from burning out device.
The checkout equipment of the integrated form of automobile combination meter as above, it is characterized in that: the message information of the controller STM32F107 process CAN that described CAN signal generation unit adopts module independent, send order by usb bus between master controller and STM32F107, STM32F107 controls CAN transceiver TJA1042 and receives and dispatches message.
The checkout equipment of the integrated form of automobile combination meter as above, is characterized in that: the chip of the AD Acquisition Circuit of described voltage signal acquisition unit adopts LTC2400.
The invention has the beneficial effects as follows: all signal generating units of combination instrument are integrated in a device interior by integrated detection equipment of the present invention, all input signals of combination instrument can be connected with this equipment with output signal, by all function i ntegration one, the stability of system can be improved, reduce costs, and simple to operate, reduce a staff workload.The automobile combination meter checkout equipment of the present invention's design can the detection automobile instrument of all-automatic all-function, replaces manual detection, can realize intelligence, efficient, accurate Detection results.This equipment also has can editorial independence learning ability, and software can be edited by panel board, in test process, can automatic identifier table, and independently judge.This meter detection equipment is applicable to the combination instrument detecting most of similar type, has versatility.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the checkout equipment of the integrated form of automobile combination meter of the present invention.
Fig. 2 is the scantling plan of automobile-used signal generator of the present invention.
Fig. 3 is the structure principle chart of resistance signal generation unit.
Fig. 4 is the structure principle chart of frequency signal generation unit.
Fig. 5 is the structure principle chart of on-off model generation unit.
Fig. 6 is the structure principle chart of voltage signal acquisition unit.
Fig. 7 is the structure principle chart of CAN signal generation unit.
Fig. 8 is the structure principle chart of plc communication unit.
Fig. 9 is the structure principle chart of relay control unit.
Figure 10 is the structure principle chart of serial communication unit.
Figure 11 is the structure principle chart of Power supply unit.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.Those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values are equally within claims limited range listed by the application.
See Fig. 1, the present invention discloses a kind of checkout equipment of integrated form of automobile combination meter, being integrated in one by the measuring ability of combination instrument of this checkout equipment innovation.Comprise Full Featured automobile-used signal generator, high precision image acquisition system and high performance industrial computer.Described automobile-used signal generator is integrated form, is encapsulated as general automobile instrument checkout equipment, inner by master controller, resistance signal generation unit, on-off model generation unit, frequency signal generation unit, the compositions such as CAN signal generation unit and voltage signal acquisition unit.After master controller receives the signal of host computer transmission, according to the communication protocol formulated, be corresponding order by the packet parsing received, control corresponding unit generation output signal, be transported to combination instrument, the actual signal in simulated automotive driving process.Automobile-used signal generator front panel there are 7 kinds of signaling interfaces, wherein outputing signal interface in 5 is switching value interface respectively, resistance signal interface, pwm signal interface, voltage signal interface, CAN signal interface, 2 kinds of input signal interfaces are that voltage signal measures input interface respectively, and frequency signal measures input interface.For often kind of concrete signaling interface, consider the short circuit that instrument may occur, the problems such as open circuit, in order to proterctive equipment and instrument to be detected, done corresponding safeguard procedures, added protection circuit, improve the stable durability of system.Often kind of interface all uses the connector of standard, and each passage corresponding is furnished with pilot lamp.To be used to refer to and the quantity of often kind of interface leaves sufficient allowance.Rear panel there are 220V AC power interface, power switch, USB interface, RS232 interface.Left and right sides is with air vent.Bottom has for fixing screw hole.
Described image capturing system, adopt the industrial camera of high definition, according to the image information of specific time acquisition instrument, send image to industrial computer, this checkout equipment adopts two groups of cameras, different focal lengths and time shutter are set, for gathering the Chinese and English character on regions different on combination instrument, particularly combination instrument in LCDs.The detection of instrument repertoire can be realized, the function simultaneously detected can be reached, reduce the time detected, raise the efficiency.
Described industrial computer, run the control software design of supporting exploitation with it, follow agreement in checkout equipment definition, realize the communication between host computer and slave computer, sending controling instruction, to slave computer, exports corresponding signal and drives instrument, control collected by camera Instrument image, and algorithm process is carried out to the image gathered, finally show testing result.This system has global function, and whether the function detecting combination instrument is fast normal, and automatically generates the function of examining report.
See Fig. 2, Full Featured automobile-used signal generator can produce all required signals in testing combination instrument process, comprises master controller, resistance signal generation unit, on-off model generation unit, frequency signal generation unit, voltage signal acquisition unit, CAN signal generation unit, plc communication unit, relay control unit, serial communication unit and Power supply unit.
Mainly introduce the detailed configuration of automobile-used signal generator below.
(1) master controller
Main control chip adopts the STM32F103ZET of ST company as controller, and master controller receives the protocol massages sent from PC serial ports, and is corresponding control command by packet parsing, controls corresponding module and produces corresponding signal.
Master controller adopts double watchdogs reset circuit, in the industrial environment of complexity, ensures the normal execution of program, improves the stability of system.Circuit board adopts block design, and adopts different electrical power to power, and reduces electromagnetic interference (EMI), improves the precision detected.Each module exports and input devises protection circuit, avoids operator's maloperation damage equipment.Main operation controller UCOS system, the order of response PC that can be real-time, the important information of EEPROM storage system, power down protection data.The function introduction that each module is detailed sees below explanation.
(2) resistance signal generation unit
See Fig. 3, resistance signal generation unit adopts the method for designing of resistor network to produce required resistance signal.Resistor network be by 8421 codings by resistance value by 0.1,0.2,0.4, the mode of 0.8 arranges, by relay in parallel with it whether conducting the size of resistance value can be set.Relay controls its conducting by chip TPIC6B595, and main control controls it by the GPIO signal wire be connected with TPIC6B595 and exports low and high level, drives relay conducting or closedown.Thus the resistance signal size of output can be controlled.
(3) frequency signal generation unit
See Fig. 4, frequency signal generation unit adopts FPGA to produce chip as frequency.Master controller sends instruction and leaves storer in by needing the relevant information such as frequency, amplitude, dutycycle of the frequency signal exported; FPGA reads information in memory; produce waveform; the frequency signal power exported due to FPGA is little; can not drive, so signal amplification, power amplification and protection circuit must be added before output.Prevent outside interference from damaging device.This element can also detect the information of frequency signal, and signal to be detected is input to buffer circuit, after filtering interference, can detect the relevant information of frequency signal.
(4) on-off model generation unit
See Fig. 5, on-off model generation unit adopts 74HC595 chip that the control signal of master controller is converted to parallel signal, controls the turn-on and turn-off of optocoupler.Optocoupler adopts the high-power driving optocoupler TPL700 of Toshiba.Drive rear class to increase short-circuit protection circuit, prevent outside signal shorts from burning out device.
(5) voltage signal acquisition unit
See Fig. 6, voltage signal acquisition unit, by after voltage signal isolation processing to be detected, is gathered by AD, and AD acquisition chip adopts LTC2400, and high precision, switching time is short, can reach accuracy requirement.
(6) CAN signal generation unit
See Fig. 7, CAN has a large amount of messages to need process, and in order to reduce the burden of master controller, the controller STM32F107 that CAN signal generation unit adopts module independent is as the message information of process CAN.Send order by usb bus between master controller and STM32F107, STM32F107 controls CAN transceiver TJA1042 and receives and dispatches message.
(7) plc communication unit
See Fig. 8, plc communication unit uses MAX485 transceiving chip to carry out the serial ports of PLC and master controller in succession, realizes the two-way transmission of data.
(8) relay control unit
See Fig. 9, relay control unit adopts triode to drive relay, the conducting of pilot relay and closedown.
(9) serial communication unit
See Figure 10, signal generator is communicated with PC and to be undertaken by serial ports, and serial communication unit adopts MAX232 transceiving chip, realizes the transmission of data.
(10) Power supply unit
See Figure 11, combination instrument needs multiple power supplies, and will realize controllable voltage and electric current.Power supply unit adopts ITECH6330 power supply can realize plurality of voltages and exports.Switched by relay, can be multiplexing by power supply.The current value of multichannel can be gathered simultaneously.Power supply is connected with signal generator by serial ports, and signal generator sends corresponding instruction and controls electric power output voltage.
The present invention coordinates control software design, can be applicable to different instrument, send different instructions by serial ports or USB port according to configuration file, after automobile-used signal generator receives different instructions, can export different control signals to combination instrument.All signals can be inputted by automobile-used signal generator, and all processes are completed automatically by software, do not need the button click that workman is extra, realize global function and the full automatic testing process completing instrument.
Described automobile-used signal generator is the signal generator aiming at auto meter design, can export whole signals of combination instrument, and quantitatively leave certain allowance, wherein:
1) switching signal leaves 80 passages, can be configured to anodic control in software, cathodic control, anode, cathodic control, and has defencive function to output current, and the electric current preventing external circuit short circuit from causing is excessive.
2) resistance signal passage leaves two-way, and a road output area is 0-40K, and a road exports as 0-40M, and minimum calibration is 0.1 Europe, and precision is 0.5%, and two paths complementation impact, can work simultaneously.
3) pwm signal exports has 8 road signals to export, and it is all identical that 8 paths export setting, and amplitude, frequency, dutycycle can freely be arranged.
4) CAN signal output channel has 2 tunnels, and two-way is equivalent arrangements, the baud rate on every road, and the agreement followed can be arranged at software interface.
5) voltage output channel has 6 road voltages to export, and wherein 4 road output voltages are DC voltage of 0-30V, and two-way is the DC voltage of 0-5V, and the maximum output current on every road is 3A, and the magnitude of voltage of output can export at software interface.
6) PWM gathers port 6 road PWM waveform acquisition passages, and maximum amplitude is 30V, highest frequency 20KHz.
7) voltage acquisition port has 6 road voltage acquisition passages, and the maximum amplitude of collection is no more than 30V.
The content be not described in detail in this instructions belongs to the known prior art of professional and technical personnel in the field.
Claims (7)
1. a checkout equipment for the integrated form of automobile combination meter, comprises automobile-used signal generator, image capturing system, industrial computer, it is characterized in that:
Described automobile-used signal generator is integrated form, be encapsulated as general automobile instrument checkout equipment, inside comprises master controller, resistance signal generation unit, on-off model generation unit, frequency signal generation unit, CAN signal generation unit and voltage signal acquisition unit, after master controller receives the signal of host computer transmission, according to the communication protocol formulated, the packet parsing received is ordered for corresponding, control corresponding unit and produce output signal, be transported to combination instrument, the actual signal in simulated automotive driving process; Automobile-used signal generator front panel there are 7 kinds of signaling interfaces, wherein outputing signal interface in 5 is switching value interface, resistance signal interface, pwm signal interface, voltage signal interface, CAN signal interface respectively, and 2 kinds of input signal interfaces are that voltage signal measures input interface, frequency signal measures input interface respectively; Often kind of interface all uses the connector of standard, and each passage corresponding is furnished with pilot lamp, rear panel has 220V AC power interface, power switch, USB interface, RS232 interface;
Described image capturing system, adopts the industrial camera of high definition, according to the image information of specific time acquisition instrument, sends image to industrial computer;
Described industrial computer, run the control software design of supporting exploitation with it, follow agreement in checkout equipment definition, realize the communication between host computer and slave computer, sending controling instruction, to slave computer, exports corresponding signal and drives instrument, controls industrial camera acquisition instrument image, and algorithm process is carried out to the image gathered, finally show testing result.
2. the checkout equipment of the integrated form of automobile combination meter according to claim 1; it is characterized in that: the chip that described master controller adopts is the STM32F103ZET of ST company; master controller receives the protocol massages sent from industrial computer serial ports; and be corresponding control command by packet parsing; control corresponding module and produce corresponding signal; master controller adopts double watchdogs reset circuit; circuit board adopts block design; and adopt different electrical power to power; each module exports and input devises protection circuit, main operation controller UCOS system.
3. the checkout equipment of the integrated form of automobile combination meter according to claim 1, it is characterized in that: described resistance signal generation unit adopts the method for designing of resistor network to produce required resistance signal, resistor network is encoded resistance value by 0.1 by 8421, 0.2, 0.4, the mode of 0.8 arranges, by relay in parallel with it whether conducting the size of resistance value is set, relay controls its conducting by chip TPIC6B595, master controller controls it by the GPIO signal wire be connected with TPIC6B595 and exports low and high level, drive relay conducting or closedown.
4. the checkout equipment of the integrated form of automobile combination meter according to claim 1, it is characterized in that: described frequency signal generation unit adopts FPGA to produce chip as frequency, master controller sends instruction and leaves storer in by needing the frequency of the frequency signal exported, amplitude, these relevant informations of dutycycle, FPGA reads information in memory, produces waveform.
5. the checkout equipment of the integrated form of automobile combination meter according to claim 1; it is characterized in that: described on-off model generation unit adopts 74HC595 chip that the control signal of master controller is converted to parallel signal; control the turn-on and turn-off of optocoupler; optocoupler adopts the high-power driving optocoupler TPL700 of Toshiba; drive rear class to increase short interruption protection circuit, prevent outside signal shorts from burning out device.
6. the checkout equipment of the integrated form of automobile combination meter according to claim 1, it is characterized in that: the message information of the controller STM32F107 process CAN that described CAN signal generation unit adopts module independent, send order by usb bus between master controller and STM32F107, STM32F107 controls CAN transceiver TJA1042 and receives and dispatches message.
7. the checkout equipment of the integrated form of automobile combination meter according to claim 1, is characterized in that: the chip of the AD Acquisition Circuit of described voltage signal acquisition unit adopts LTC2400.
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| CN105700458A (en) * | 2016-03-25 | 2016-06-22 | 航天科技控股集团股份有限公司 | Automotive instrument intelligent testing device based on PLC control |
| CN106404417A (en) * | 2016-08-03 | 2017-02-15 | 重庆盟讯电子科技有限公司 | Non-contact type automobile instrument panel test system and method |
| CN106404031A (en) * | 2016-06-30 | 2017-02-15 | 延锋伟世通电子科技（南京）有限公司 | Universal development testing rack for automobile instrument |
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| CN114815787A (en) * | 2022-06-28 | 2022-07-29 | 航天科技控股集团股份有限公司 | Automatic testing method for fault codes of full liquid crystal instrument |
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| CN110987467A (en) * | 2019-11-25 | 2020-04-10 | 航天科技控股集团股份有限公司 | Method for realizing automatic detection of automobile instrument by configuring csv file |
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| CN114815787A (en) * | 2022-06-28 | 2022-07-29 | 航天科技控股集团股份有限公司 | Automatic testing method for fault codes of full liquid crystal instrument |
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