CN103605301A - Automobile instrument calibrator system and circuit based on field-programmable gate array - Google Patents
Automobile instrument calibrator system and circuit based on field-programmable gate array Download PDFInfo
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- CN103605301A CN103605301A CN201310286392.8A CN201310286392A CN103605301A CN 103605301 A CN103605301 A CN 103605301A CN 201310286392 A CN201310286392 A CN 201310286392A CN 103605301 A CN103605301 A CN 103605301A
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Abstract
The invention discloses an automobile instrument calibrator system and a circuit based on a field-programmable gate array. The system comprises an input module for a user to input a control command to generate a clock signal and for switching on and switching off functions of the whole system; a field-programmable gate array module for generating a connected control signal; a calibration voltage supply module for providing a calibration voltage required by system calibration; a waveform signal processing module for converting a sine wave or a square wave of a digital value generated by the field-programmable gate array module into an analog signal required by a revolution meter; a resistance network module for providing a resistance signal for a water temperature gauge, a fuel gauge, and an oil pressure gauge for calibration; a stepping motor control module for controlling a stepping motor to drive a load to rotate for calibration; a lamp set control unit module for detecting an indicator light and an alarm; and a display module for displaying an input frequency value or resistance value. In addition, the automobile instrument calibrator system and the circuit based on the field-programmable gate array is simple in structure, convenient to operate, and relatively strong in practicability.
Description
Technical field
The invention belongs to automatic electronic technical field, relate in particular to a kind of automobile instrument tester system and circuit based on field programmable gate array.
Background technology
High speed development along with auto industry, the structure of each ingredient of Hyundai Motor is also increasingly sophisticated, its auxiliary equipment is also more and more, the particularly application of the combination of computer technology, electronic technology, network technology and lcd technology and automobile instrument in recent years, all improves a lot to improving of overall performance index, appearance structure and the function of instrument.Fascia is as the information center of Hyundai Motor, for driver provides more driving informations more rapidly, make driver can take timely and effectively corresponding operation, assurance automotive safety is normally worked, thereby its quality of production will be directly connected to the security of running car, the quality of comfortableness and car load.Yet in the production run of large batch of automobile instrument, also caused another problem, i.e. the check problem of automobile instrument.In order to reduce the production cost of instrument, improve its production efficiency, guarantee the quality of product, how to develop a kind of tester that can accurately detect automobile instrument become one important and be rich in the problem of application value.
At home, product major part before, based on microcomputer development, does not also have the tester of the automobile instrument based on field programmable gate array.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of automobile instrument tester system and circuit based on field programmable gate array, be intended to solution product major part at home based on microcomputer development, also there is no the problem of the tester of the automobile instrument based on field programmable gate array.
The embodiment of the present invention is to realize like this, a kind of automobile instrument tester system based on field programmable gate array, should the automobile instrument tester system based on field programmable gate array comprise: load module, field programmable gate array module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp are control module module, display module, tachometer gage, water-thermometer, fuel gauge, oil pressure gauge, stepper motor, speedometer;
For user's input control order, clocking, the load module of switch whole system function;
Be that control module module, display module are connected with load module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp, for generation of connected load module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp, be the field programmable gate array module of the control signal of control module module, display module connection, receive the input control order of load module;
With lamp be control module module, tachometer gage, water-thermometer, fuel gauge, oil pressure gauge, speedometer connect, for the calibration voltage supplying module of the required calibration voltage of system check is provided;
Be connected with tachometer gage, for converting sine wave or the square wave of the digital quantity of field programmable gate array module generation to tachometer gage required analog signal waveform signal processing module;
With water-thermometer, fuel gauge, oil pressure gauge connects, and is used to water-thermometer, fuel gauge, and oil pressure gauge provides resistance signal to carry out the resistor network module of verification;
Be connected with stepper motor, the step motor control module of rotating to carry out verification for the load of control step driven by motor, stepper motor connects speedometer;
Being connected with calibration voltage supplying module, is control module module for the lamp that pilot lamp, alarm are detected, and receives the voltage signal of calibration voltage supplying module;
Be connected with field programmable gate array module, for showing the frequency values of input or the display module of resistance value.
Further, what load module outside was inputted is the clock signal of 50MHz, by the switch key being directly connected with field programmable gate array module I/O mouth, realizes the switch to whole check system.
Further, load module is realized user by 4*4 matrix keyboard the control of system and instruction is inputted.
Further, 4*4 matrix keyboard method for designing is that every horizontal line is connected by a button at infall with perpendicular line, KRY0, and KEY1, KEY2, KEY3 connects 9,8,7,6 pins of COM successively.
Further, recognition by pressing keys method adopts the concrete step of line scanning method to be:
The first step: judge in keyboard and whether have key to press; First, whole lines should be set low to level, then start to detect the state of alignment, if wherein the level of row is low, representing has key to press in keyboard, if all alignments are high level, in keyboard, without key, presses;
Second step: judge the position at closed key place, after the process judgement of the first step, if after confirming have key to press, just can enter the step of concrete closed key judgement;
Method is: successively line is set to low level in order, a line of noting can only putting each time in four lines is wherein low level, all the other lines are high level, after definite one of them line position is low level, next just to carry out the detection of the level state of each alignment, if detect a certain classify as low, find this row position, this alignment is exactly the button of pressing with the button that is set to low level line infall, and rank scanning line is received 1/0 mouthful of field programmable gate array;
Through the first step and second step, just can accurately judge the position at button place, then according to predetermined function, process accordingly.
Further, calibration voltage supplying module adopts chip TLC5615 and OPA551 to overlap, and what circuit was concrete is connected to:
The Din_dac of TLC5615 chip connects the data signal interfaces that field programmable gate array module provides, clk_dac connects the serial clock signal delivery outlet of field programmable gate array module, cs_dac is chip selection signal interface, input low level, Dout is unsettled, the power supply of connect+30V of VDD, and the power supply of+30V is by the capacity earth of a 0.1uF, REFIN meets the Vref of 2.16V, and Vref is by the capacity earth of a 0.1uF, AGND ground connection, the resistance R 1 of VOUT by 2.5K Ω connect OPA551 chip-IN;
The NC of OPA551 chip is by the R2 ground connection of resistance 3K Ω, the power supply of be jointly connected with V--30V of+IN, and the parallel circuit ground connection that the power supply of-30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of FLAG, and the parallel circuit ground connection that the power supply of+30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of V+, OUT meets NC by the resistance R 3 of 15K Ω.
Further, waveform signal processing module adopts chip DAC0832 and amplifier TL082 to overlap, being specifically connected to of circuit:
PIO23-PIO31 is the I/O mouth of field programmable gate array module, meets successively the DO-D7 of DAC0832, WR1 ground connection, FB connects 1 port of TL082/1, and IOUT1 connects 2 ports of TL082/1, and between FB and IOUT1, is connected to the electric capacity of a 51pF, IOUT2 connects 3 ports of TL082/1, and IOUT2 ,/CS, WR2, XFER, GND (pin 3), GND (pin one 0) ground connection, connect+5V of VERF power supply, VCC meets power supply VCC;
The output terminal 1 of TL082/1 connects the input port 6 of TL082/2 by the resistance of a 5.1K Ω;
Further, the design of resistor network module comprises connection and the driving thereof of resistor network;
Being connected to of resistor network: resistor network adopts the mode of series connection to realize, each resistor network is by 800 Ω, 400 Ω, 200 Ω, 100 Ω, 80 Ω, 40 Ω, 20 Ω, 10 Ω, 8 Ω, 4 Ω, 2 Ω, 1 Ω, 0.8 Ω, 0.4 Ω, 0.2 Ω, 0.1 16 of Ω precision resistance successively with corresponding relay K 1, K2, K3......K16 composes in parallel;
The driving of resistor network is connected to: each input port of MC1413 connects field programmable gate array module by the resistance of 2.7K Ω, and pilot relay work, the connection of the relay that remaining is in parallel with a resistor, has how many precision resistances just to configure how many corresponding driving circuits.
Further, the circuit of step motor control module is specifically connected to::
The A of stepper motor, B, C three-phase circuit catenation principle are identical, the A of take is example mutually: the PIO mouth of field programmable gate array module connects 9014 base stages after connecing 74LS14 phase inverter, and by connect+5V of the resistance of 6.7K Ω power supply, + 5V power supply connects 9014 collectors by the resistance of 670 Ω, and 9014 emitters are by the input end grounding of 74BF004; + 25V power supply connects the output terminal of 74BF004, the base stage of TIP122 and grounded emitter by the resistance of 33K Ω; + 25V is through the resistance R 1 (B is R2 mutually, and C is R3 mutually) of 1K Ω, RL1 (B is RL2 mutually, and C is RL3 mutually), and the parallel circuit that the resistance of 50 Ω and the electric capacity of 200uF form is by the collector and emitter ground connection of TIP122; + 25V is through D1 (B is D2 mutually, and C is D3 mutually), and the resistance of 200 Ω is by the collector and emitter ground connection of TIP122.
Further, the control method of step motor control module is: field programmable gate array module is sent gating pulse enter 9014 amplifications after the anti-phase output of 74LS14 after and just can be controlled the break-make of optoelectronic switch 74BF004 from PIO mouth, optoelectronic switch 74BF004 mainly plays photoelectricity isolation, pulse signal is carried out the amplification of voltage and current by power tube TIP122, thereby the break-make of corresponding A, B, C phase winding in Driving Stepping Motor, make stepper motor make respectively forward according to different control signals, reversion, stall, accelerates.
Automobile instrument tester system and circuit based on field programmable gate array provided by the invention, adopts 4*4 matrix keyboard by load module, has greatly reduced the resource that takies I/O mouth; Design by calibration voltage supplying module finally can provide any value between 0-26V for instrument check; By the design of two amplifiers of waveform signal processing module, realized respectively current signal and be converted to voltage signal and filter function; By the design of resistor network module, met the supply of the needed resistance from O-999.9 Europe of automobile instrument verification, volume is little, and precision is high.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the automobile instrument tester system based on field programmable gate array that provides of the embodiment of the present invention;
In figure: 1, load module; 2, field programmable gate array module; 3, calibration voltage supplying module; 4, waveform signal processing module; 5, resistor network module; 6, step motor control module; 7, lamp is control module module; 8, display module; 9, tachometer gage; 10, water-thermometer, fuel gauge, oil pressure gauge; 11, stepper motor; 12, speedometer;
Fig. 2 is the 4*4 matrix keyboard circuit figure of the automobile instrument tester load module based on field programmable gate array that provides of the embodiment of the present invention;
Fig. 3 is the circuit diagram of the automobile instrument tester calibration voltage supplying module based on field programmable gate array that provides of the embodiment of the present invention;
Fig. 4 is the circuit diagram of the automobile instrument tester waveform signal processing module based on field programmable gate array that provides of the embodiment of the present invention.
Fig. 5 is the automobile instrument tester resistor network module resistor network connecting circuit figure based on field programmable gate array that the embodiment of the present invention provides.
Fig. 6 is the automobile instrument tester resistor network module resistor network driving circuit figure based on field programmable gate array that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the automobile instrument tester system architecture based on field programmable gate array provided by the invention.For convenience of explanation, only show part related to the present invention.
Automobile instrument tester system based on field programmable gate array of the present invention, should the automobile instrument tester system based on field programmable gate array comprise: load module, field programmable gate array module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp are control module module, display module, tachometer gage, water-thermometer, fuel gauge, oil pressure gauge, stepper motor, speedometer;
For user's input control order, clocking, the load module of switch whole system function;
Be that control module module, display module are connected with load module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp, for generation of connected load module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp, be the field programmable gate array module of the control signal of control module module, display module connection, receive the input control order of load module;
With lamp be control module module, tachometer gage, water-thermometer, fuel gauge, oil pressure gauge, speedometer connect, for the calibration voltage supplying module of the required calibration voltage of system check is provided;
Be connected with tachometer gage, for converting sine wave or the square wave of the digital quantity of field programmable gate array module generation to tachometer gage required analog signal waveform signal processing module;
With water-thermometer, fuel gauge, oil pressure gauge connects, and is used to water-thermometer, fuel gauge, and oil pressure gauge provides resistance signal to carry out the resistor network module of verification;
Be connected with stepper motor, the step motor control module of rotating to carry out verification for the load of control step driven by motor, stepper motor connects speedometer;
Being connected with calibration voltage supplying module, is control module module for the lamp that pilot lamp, alarm are detected, and receives the voltage signal of calibration voltage supplying module;
Be connected with field programmable gate array module, for showing the frequency values of input or the display module of resistance value.
As a prioritization scheme of the embodiment of the present invention, what load module outside was inputted is the clock signal of 50MHz, by the switch key being directly connected with field programmable gate array module I/O mouth, realizes the switch to whole check system.
As a prioritization scheme of the embodiment of the present invention, load module is realized user by 4*4 matrix keyboard the control of system and instruction is inputted.
As a prioritization scheme of the embodiment of the present invention, 4*4 matrix keyboard method for designing is that every horizontal line is connected by a button at infall with perpendicular line, KRY0, and KEY1, KEY2, KEY3 connects 9,8,7,6 pins of COM successively.
As a prioritization scheme of the embodiment of the present invention, recognition by pressing keys method adopts the concrete step of line scanning method to be:
The first step: judge in keyboard and whether have key to press; First, whole lines should be set low to level, then start to detect the state of alignment, if wherein the level of row is low, representing has key to press in keyboard, if all alignments are high level, in keyboard, without key, presses;
Second step: judge the position at closed key place, after the process judgement of the first step, if after confirming have key to press, just can enter the step of concrete closed key judgement;
Method is: successively line is set to low level in order, a line of noting can only putting each time in four lines is wherein low level, all the other lines are high level, after definite one of them line position is low level, next just to carry out the detection of the level state of each alignment, if detect a certain classify as low, find this row position, this alignment is exactly the button of pressing with the button that is set to low level line infall, and rank scanning line is received 1/0 mouthful of field programmable gate array;
Through the first step and second step, just can accurately judge the position at button place, then according to predetermined function, process accordingly.
As a prioritization scheme of the embodiment of the present invention, calibration voltage supplying module adopts chip TLC5615 and OPA551 to overlap, and what circuit was concrete is connected to:
The Din_dac of TLC5615 chip connects the data signal interfaces that field programmable gate array module provides, clk_dac connects the serial clock signal delivery outlet of field programmable gate array module, cs_dac is chip selection signal interface, input low level, Dout is unsettled, the power supply of connect+30V of VDD, and the power supply of+30V is by the capacity earth of a 0.1uF, REFIN meets the Vref of 2.16V, and Vref is by the capacity earth of a 0.1uF, AGND ground connection, the resistance R 1 of VOUT by 2.5K Ω connect OPA551 chip-IN;
The NC of OPA551 chip is by the R2 ground connection of resistance 3K Ω, the power supply of be jointly connected with V--30V of+IN, and the parallel circuit ground connection that the power supply of-30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of FLAG, and the parallel circuit ground connection that the power supply of+30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of V+, OUT meets NC by the resistance R 3 of 15K Ω.
As a prioritization scheme of the embodiment of the present invention, waveform signal processing module adopts chip DAC0832 and amplifier TL082 to overlap, being specifically connected to of circuit:
PIO23-PIO31 is the I/O mouth of field programmable gate array module, meets successively the DO-D7 of DAC0832, WR1 ground connection, FB connects 1 port of TL082/1, and IOUT1 connects 2 ports of TL082/1, and between FB and IOUT1, is connected to the electric capacity of a 51pF, IOUT2 connects 3 ports of TL082/1, and IOUT2 ,/CS, WR2, XFER, GND (pin 3), GND (pin one 0) ground connection, connect+5V of VERF power supply, VCC meets power supply VCC;
The output terminal 1 of TL082/1 connects the input port 6 of TL082/2 by the resistance of a 5.1K Ω;
As a prioritization scheme of the embodiment of the present invention, the design of resistor network module comprises connection and the driving thereof of resistor network;
Being connected to of resistor network: resistor network adopts the mode of series connection to realize, each resistor network is by 800 Ω, 400 Ω, 200 Ω, 100 Ω, 80 Ω, 40 Ω, 20 Ω, 10 Ω, 8 Ω, 4 Ω, 2 Ω, 1 Ω, 0.8 Ω, 0.4 Ω, 0.2 Ω, 0.1 16 of Ω precision resistance successively with corresponding relay K 1, K2, K3......K16 composes in parallel;
The driving of resistor network is connected to: each input port of MC1413 connects field programmable gate array module by the resistance of 2.7K Ω, and pilot relay work, the connection of the relay that remaining is in parallel with a resistor, has how many precision resistances just to configure how many corresponding driving circuits.
As a prioritization scheme of the embodiment of the present invention, the circuit of step motor control module is specifically connected to::
The A of stepper motor, B, C three-phase circuit catenation principle are identical, the A of take is example mutually: the PIO mouth of field programmable gate array module connects 9014 base stages after connecing 74LS14 phase inverter, and by connect+5V of the resistance of 6.7K Ω power supply, + 5V power supply connects 9014 collectors by the resistance of 670 Ω, and 9014 emitters are by the input end grounding of 74BF004; + 25V power supply connects the output terminal of 74BF004, the base stage of TIP122 and grounded emitter by the resistance of 33K Ω; + 25V is through the resistance R 1 (B is R2 mutually, and C is R3 mutually) of 1K Ω, RL1 (B is RL2 mutually, and C is RL3 mutually), and the parallel circuit that the resistance of 50 Ω and the electric capacity of 200uF form is by the collector and emitter ground connection of TIP122; + 25V is through D1 (B is D2 mutually, and C is D3 mutually), and the resistance of 200 Ω is by the collector and emitter ground connection of TIP122.
A prioritization scheme as the embodiment of the present invention, the control method of step motor control module is: field programmable gate array module is sent gating pulse enter 9014 amplifications after the anti-phase output of 74LS14 after and just can be controlled the break-make of optoelectronic switch 74BF004 from PIO mouth, optoelectronic switch 74BF004 mainly plays photoelectricity isolation, pulse signal is carried out the amplification of voltage and current by power tube TIP122, thereby corresponding A in Driving Stepping Motor, B, the break-make of C phase winding, make stepper motor make respectively forward according to different control signals, reversion, stall, accelerate.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
As shown in Figure 1, the automobile instrument tester system based on field programmable gate array of the embodiment of the present invention is mainly control module module 7, display module 8, tachometer gage 9, water-thermometer by load module 1, field programmable gate array module 2, calibration voltage supplying module 3, waveform signal processing module 4, resistor network module 5, step motor control module 6, lamp, fuel gauge, oil pressure gauge 10, stepper motor 11, speedometer 12 form;
Field programmable gate array module 2, connects calibration voltage supplying module 3, waveform signal processing module 4, and resistor network module 5, step motor control module 6, lamp is control module module 7, display module 8, for generation of the control signal of each module of connect;
Calibration voltage supplying module 3, connecting lamp is control module module 7, tachometer gage 9, water-thermometer, fuel gauge, oil pressure gauge 10, speedometer 12, for providing system check required calibration voltage;
Waveform signal processing module 4, connects tachometer gage 9, for converting sine wave or the square wave of the digital quantity of field programmable gate array module 2 generations to tachometer gage 9 required simulating signal;
Step motor control module 6, connects stepper motor 11, and stepper motor 11 connects speedometer 12, for the 11 band dynamic loads of control step motor, rotates to carry out verification;
Lamp is control module module 7, for pilot lamp, alarm etc. is detected;
What load module 1 outside was inputted is the clock signal of 50MHz, by the switch key being directly connected with field programmable gate array module 2I/O mouth, realizes the switch to whole check system; Load module 1 is realized user by 4*4 matrix keyboard the control of system and instruction is inputted; 4*4 matrix keyboard method for designing as shown in Figure 2,
Every horizontal line is connected by a button at infall with perpendicular line, KRY0, and KEY1, KEY2, KEY3 connects 9,8,7,6 pins of COM successively;
Recognition by pressing keys method adopts line scanning method, and process is as follows:
The first step: judge in keyboard and whether have key to press; First, whole lines should be set low to level, then start to detect the state of alignment, if wherein the level of row is low, representing has key to press in keyboard, if all alignments are high level, in keyboard, without key, presses;
Second step: the position that judges closed key place.After the process judgement of the first step, if after confirming have key to press, just can enter the step of concrete closed key judgement.Its method is: successively line is set to low level in order, a line of noting can only putting each time in four lines is wherein low level, and all the other lines are high level.After definite one of them line position is low level, next just to carry out the detection of the level state of each alignment.If detect, a certainly classify as lowly, find this row position, this alignment is exactly the button of pressing with the button that is set to low level line infall.Its rank scanning line is received 1/0 mouthful of field programmable gate array;
Through the first step and second step, just can accurately judge the position at button place, then according to predetermined function, process accordingly;
Table 1
| 1 | 2 | 3 | |
| 4 | 5 | 6 | |
| 7 | 8 | 9 | |
| 0 | Oil pressure gauge | Speedometer | Water-thermometer |
The figure of key arrangement in its distribution corresponding diagram 2, i.e. the corresponding numerical key 1 of Kl, the corresponding numerical key 4 of KZ, gets on each key correspondence according to this, and its each key function is as follows:
O-9: be numerical key, be mainly used to the numerical values recited of input frequency signal and resistance;
Sinusoidal wave: to press this key and can select to be output as sine wave;
Square wave: press this key and will export square wave;
Fuel gauge/water-thermometer/oil pressure gauge: pressing any one in three keys and numerical value is set to provide resistance signal for corresponding instrument;
Speedometer: press this key and arrange numerical value and will provide signal (driving of stepper motor is also to arrange by this key) for speedometer;
Calibration voltage supplying module 3 adopts chip TLC5615 and OPA551 to overlap, circuit diagram as shown in Figure 4:
The Din_dac of TLC5615 chip connects the data signal interfaces that field programmable gate array module 2 provides, clk_dac connects the serial clock signal delivery outlet of field programmable gate array module 2, cs_dac is chip selection signal interface, input low level, Dout is unsettled, the power supply of connect+30V of VDD, and the power supply of+30V is by the capacity earth of a 0.1uF, REFIN meets the Vref of 2.16V, and Vref is by the capacity earth of a 0.1uF, AGND ground connection, the resistance R 1 of VOUT by 2.5K Ω connect OPA551 chip-IN;
The NC of OPA551 chip is by the R2 ground connection of resistance 3K Ω, the power supply of be jointly connected with V--30V of+IN, and the parallel circuit ground connection that the power supply of-30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of FLAG, and the parallel circuit ground connection that the power supply of+30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of V+, OUT meets NC by the resistance R 3 of 15K Ω.
Waveform signal processing module 4 adopts chip DAC0832 and amplifier TL082 to overlap, the concrete connection of circuit, as shown in Figure 5:
PIO23-PIO31 is the I/O mouth of field programmable gate array module 2, meets successively the DO-D7 of DAC0832, WR1 ground connection, FB connects 1 port of TL082/1, and IOUT1 connects 2 ports of TL082/1, and between FB and IOUT1, is connected to the electric capacity of a 51pF, IOUT2 connects 3 ports of TL082/1, and IOUT2 ,/CS, WR2, XFER, GND (pin 3), GND (pin one 0) ground connection, connect+5V of VERF power supply, VCC meets power supply VCC;
The output terminal 1 of TL082/1 connects the input port 6 of TL082/2 by the resistance of a 5.1K Ω;
The design of resistor network module 6 comprises connection and the driving thereof of resistor network, and method for designing is:
The connection of resistor network is designed to:
For realizing the verification to fuel gauge, water-thermometer, three tables of oil pressure gauge, select three resistor networks that resistance signal is provided, its principle is consistent, the connection layout of any one resistor network as shown in Figure 6:
Resistor network adopts the mode of series connection to realize, and each resistor network is by 800 Ω, 400 Ω, 200 Ω, 100 Ω, 80 Ω, 40 Ω, 20 Ω, 10 Ω, 8 Ω, 4 Ω, 2 Ω, 1 Ω, 0.8 Ω, 0.4 Ω, 0.2 Ω, 0.1 16 of Ω precision resistance successively with corresponding relay K 1, K2, K3......K16 composes in parallel.
Adopt 8421 coded systems, as long as control the disconnection of corresponding relay K 1 to K16 or close, its corresponding resistance will access or disconnect like this, and it is exactly the resistance value of output that the finally resistance of access series connection is added.
The driving of resistor network is designed to:
Adopt MC1413 to drive the work of chip controls relay, the part connection layout of control circuit:
Each input port of MC1413 connects field programmable gate array module 2 by the resistance of 2.7K Ω, and pilot relay work.The connection of the relay that remaining is in parallel with a resistor, has how many precision resistances just to configure how many corresponding driving circuits.
The design of step motor control module 7:
The A of stepper motor, B, C three-phase circuit catenation principle are identical.The A of take is example mutually: the PIO mouth of field programmable gate array module 2 connects 9014 base stages after connecing 74LS14 phase inverter, and by connect+5V of the resistance of 6.7K Ω power supply, + 5V power supply connects 9014 collectors by the resistance of 670 Ω, and 9014 emitters are by the input end grounding of 74BF004; + 25V power supply connects the output terminal of 74BF004, the base stage of TIP122 and grounded emitter by the resistance of 33K Ω; + 25V is through the resistance R 1 (B is R2 mutually, and C is R3 mutually) of 1K Ω, RL1 (B is RL2 mutually, and C is RL3 mutually), and the parallel circuit that the resistance of 50 Ω and the electric capacity of 200uF form is by the collector and emitter ground connection of TIP122; + 25V is through D1 (B is D2 mutually, and C is D3 mutually), and the resistance of 200 Ω is by the collector and emitter ground connection of TIP122.
Control method is: field programmable gate array module 2 is sent gating pulse enter 9014 amplifications after the anti-phase output of 74LS14 after and just can be controlled the break-make of optoelectronic switch 74BF004 from PIO mouth, optoelectronic switch 74BF004 mainly plays photoelectricity isolation, pulse signal carries out the amplification of voltage and current by power tube TIP122 to it, thereby the break-make of corresponding A, B, C phase winding in Driving Stepping Motor, make stepper motor make respectively forward according to different control signals, reversion, stall, accelerates.
Lamp is that control module module 9 provides the test of 14 street lamp systems; Display module 8 adopts group of four figures pipe to realize Presentation Function.
Principle of work of the present invention:
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the automobile instrument tester system based on field programmable gate array, it is characterized in that, should the automobile instrument tester system based on field programmable gate array comprise: load module, field programmable gate array module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp are control module module, display module, tachometer gage, water-thermometer, fuel gauge, oil pressure gauge, stepper motor, speedometer;
For user's input control order, clocking, the load module of switch whole system function;
Be that control module module, display module are connected with load module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp, for generation of connected load module, calibration voltage supplying module, waveform signal processing module, resistor network module, step motor control module, lamp, be the field programmable gate array module of the control signal of control module module, display module connection, receive the input control order of load module;
With lamp be control module module, tachometer gage, water-thermometer, fuel gauge, oil pressure gauge, speedometer connect, for the calibration voltage supplying module of the required calibration voltage of system check is provided;
Be connected with tachometer gage, for converting sine wave or the square wave of the digital quantity of field programmable gate array module generation to tachometer gage required analog signal waveform signal processing module;
With water-thermometer, fuel gauge, oil pressure gauge connects, and is used to water-thermometer, fuel gauge, and oil pressure gauge provides resistance signal to carry out the resistor network module of verification;
Be connected with stepper motor, the step motor control module of rotating to carry out verification for the load of control step driven by motor, stepper motor connects speedometer;
Being connected with calibration voltage supplying module, is control module module for the lamp that pilot lamp, alarm are detected, and receives the voltage signal of calibration voltage supplying module;
Be connected with field programmable gate array module, for showing the frequency values of input or the display module of resistance value.
2. the automobile instrument tester system based on field programmable gate array as claimed in claim 1, it is characterized in that, what load module outside was inputted is the clock signal of 50MHz, by the switch key being directly connected with field programmable gate array module I/O mouth, realizes the switch to whole check system.
3. the automobile instrument tester system based on field programmable gate array as claimed in claim 1, is characterized in that, load module is realized user by 4*4 matrix keyboard the control of system and instruction are inputted.
4. the automobile instrument tester system based on field programmable gate array as claimed in claim 3, it is characterized in that, 4*4 matrix keyboard method for designing is that every horizontal line is connected by a button at infall with perpendicular line, KRY0, KEY1, KEY2, KEY3 meets 9 of COM successively, 8,7,6 pins.
5. the automobile instrument tester system based on field programmable gate array as claimed in claim 4, is characterized in that, recognition by pressing keys method adopts line scanning method, and concrete step is:
The first step: judge in keyboard and whether have key to press; First, whole lines should be set low to level, then start to detect the state of alignment, if wherein the level of row is low, representing has key to press in keyboard, if all alignments are high level, in keyboard, without key, presses;
Second step: judge the position at closed key place, after the process judgement of the first step, if after confirming have key to press, just can enter the step of concrete closed key judgement;
Method is: successively line is set to low level in order, a line of noting can only putting each time in four lines is wherein low level, all the other lines are high level, after definite one of them line position is low level, next just to carry out the detection of the level state of each alignment, if detect a certain classify as low, find this row position, this alignment is exactly the button of pressing with the button that is set to low level line infall, and rank scanning line is received 1/0 mouthful of field programmable gate array;
Through the first step and second step, just can accurately judge the position at button place, then according to predetermined function, process accordingly.
6. the automobile instrument tester system based on field programmable gate array as claimed in claim 1, is characterized in that, calibration voltage supplying module adopts chip TLC5615 and OPA551 to overlap, and what circuit was concrete is connected to:
The Din_dac of TLC5615 chip connects the data signal interfaces that field programmable gate array module provides, clk_dac connects the serial clock signal delivery outlet of field programmable gate array module, cs_dac is chip selection signal interface, input low level, Dout is unsettled, the power supply of connect+30V of VDD, and the power supply of+30V is by the capacity earth of a 0.1uF, REFIN meets the Vref of 2.16V, and Vref is by the capacity earth of a 0.1uF, AGND ground connection, the resistance R 1 of VOUT by 2.5K Ω connect OPA551 chip-IN;
The NC of OPA551 chip is by the R2 ground connection of resistance 3K Ω, the power supply of be jointly connected with V--30V of+IN, and the parallel circuit ground connection that the power supply of-30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of FLAG, and the parallel circuit ground connection that the power supply of+30V consists of the electric capacity by two 0.1uF, the power supply of connect+30V of V+, OUT meets NC by the resistance R 3 of 15K Ω.
7. the automobile instrument tester system based on field programmable gate array as claimed in claim 1, is characterized in that, waveform signal processing module adopts chip DAC0832 and amplifier TL082 to overlap, being specifically connected to of circuit:
PIO23-PIO31 is the I/O mouth of field programmable gate array module, meets successively the DO-D7 of DAC0832, WR1 ground connection, FB connects 1 port of TL082/1, and IOUT1 connects 2 ports of TL082/1, and between FB and IOUT1, is connected to the electric capacity of a 51pF, IOUT2 connects 3 ports of TL082/1, and IOUT2 ,/CS, WR2, XFER, GND (pin 3), GND (pin one 0) ground connection, connect+5V of VERF power supply, VCC meets power supply VCC;
The output terminal 1 of TL082/1 connects the input port 6 of TL082/2 by the resistance of a 5.1K Ω;
Input port 5 ground connection of TL082/2, output terminal connects input port 6 by resistance and an electric capacity of a 7.2K Ω.
8. the automobile instrument tester system based on field programmable gate array as claimed in claim 1, is characterized in that, the design of resistor network module comprises connection and the driving thereof of resistor network;
Being connected to of resistor network: resistor network adopts the mode of series connection to realize, each resistor network is by 800 Ω, 400 Ω, 200 Ω, 100 Ω, 80 Ω, 40 Ω, 20 Ω, 10 Ω, 8 Ω, 4 Ω, 2 Ω, 1 Ω, 0.8 Ω, 0.4 Ω, 0.2 Ω, 0.1 16 of Ω precision resistance successively with corresponding relay K 1, K2, K3......K16 composes in parallel;
The driving of resistor network is connected to: each input port of MC1413 connects field programmable gate array module by the resistance of 2.7K Ω, and pilot relay work, the connection of the relay that remaining is in parallel with a resistor, has how many precision resistances just to configure how many corresponding driving circuits.
9. the automobile instrument tester system based on field programmable gate array as claimed in claim 1, is characterized in that, the circuit of step motor control module is specifically connected to::
The A of stepper motor, B, C three-phase circuit catenation principle are identical, the A of take is example mutually: the PIO mouth of field programmable gate array module connects 9014 base stages after connecing 74LS14 phase inverter, and by connect+5V of the resistance of 6.7K Ω power supply, + 5V power supply connects 9014 collectors by the resistance of 670 Ω, and 9014 emitters are by the input end grounding of 74BF004; + 25V power supply connects the output terminal of 74BF004, the base stage of TIP122 and grounded emitter by the resistance of 33K Ω; + 25V is through the resistance R 1 (B is R2 mutually, and C is R3 mutually) of 1K Ω, RL1 (B is RL2 mutually, and C is RL3 mutually), and the parallel circuit that the resistance of 50 Ω and the electric capacity of 200uF form is by the collector and emitter ground connection of TIP122; + 25V is through D1 (B is D2 mutually, and C is D3 mutually), and the resistance of 200 Ω is by the collector and emitter ground connection of TIP122.
10. the automobile instrument tester system based on field programmable gate array as claimed in claim 9, it is characterized in that, the control method of step motor control module is: field programmable gate array module is sent gating pulse enter 9014 amplifications after the anti-phase output of 74LS14 after and just can be controlled the break-make of optoelectronic switch 74BF004 from PIO mouth, optoelectronic switch 74BF004 mainly plays photoelectricity isolation, pulse signal is carried out the amplification of voltage and current by power tube TIP122, thereby corresponding A in Driving Stepping Motor, B, the break-make of C phase winding, make stepper motor make respectively forward according to different control signals, reversion, stall, accelerate.
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| CN201310286392.8A CN103605301B (en) | 2013-07-08 | 2013-07-08 | A kind of automobile instrument tester system based on field-programmable gate array and circuit |
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| CN103605301B (en) | 2016-06-01 |
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