CN109882472A - Commercial vehicle air pressure rear axle module assembly characteristic test system and method - Google Patents
Commercial vehicle air pressure rear axle module assembly characteristic test system and method Download PDFInfo
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Abstract
The invention discloses commercial vehicle air pressure rear axle module assembly characteristic test system and method, system mainly includes pneumatic system, TT&C system and host computer.Pneumatic system simulates the characteristic of the air pressure condition test-control systematic survey air pressure rear axle module assembly of air pressure rear axle module assembly.Method key step are as follows: 1) exemplar controls and receives the flow and speed of gas according to pulse voltage signal III.Exemplar controls the flow and speed of discharge gas according to pulse voltage signal IV；2) air pressure signal of baroceptor monitoring exemplar, and it is sent to data acquisition device；3) air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to host computer by data acquisition device；4) host computer obtains air pressure rear axle module assembly characteristic.Commercial vehicle air pressure rear axle module assembly characteristic test system provided by the invention and method, can be with the static characteristic of measuring air pressure rear axle module assembly, dynamic characteristic, response characteristic and regulatory function.
Description
Technical field
The present invention relates to auto parts and components the field of test technology, specifically commercial vehicle air pressure rear axle module assembly characteristic tests
System and method.
Background technique
In recent years, anti-lock braking system in automobiles is widely used on trailer and semitrailer, traditional air pressure
That there are volumes is big for anti-blocking brake system (ABS system), space utilization rate is low and easily leak air situation the shortcomings that.Air pressure rear axle
Module assembly contains the function of relay valve and ABS air pressure electromagnetic regulator simultaneously, and reduces components volume, improves
Braking response speed, reduces piping connection, and the pile-up valve as air pressure rear axle module assembly is in air braking system
It is widely used.For each functional characteristic for really reflecting air pressure rear axle module assembly, design is a set of to be directed to commercial vehicle air pressure
The test method of rear axle module assembly characteristic is very significant.
Promulgate there is automobile industry standard QC/T 35-2015 " automobile and trailer air pressure control currently, being directed to relay valve country
Device performance requirement processed and Bench test methods ", being directed to the promulgation of air pressure ABS electromagnetic regulator has automobile industry standard QC/T
1006-2015 " anti-block braking system of car air pressure electromagnetic regulator performance requirement and Bench test methods ", wherein concrete regulation
Testing equipment requirement, pilot project, experimental condition and Performance Evaluating Indexes.But it is directed to as commercial vehicle air pressure rear axle module is total
Specific requirement is not made at a kind of pile-up valve, test condition, test item and evaluation index etc. are all without specific
Specification, it can be seen that air pressure rear axle module assembly measuring technology is still not perfect.
In addition, the detection device of commercial vehicle pneumatic brake valve class does not have mostly to meet based on conventional detection demand now
Dynamic detectability cannot be completed to test as there is ABS to participate in the high frequency dynamic in braking process.
Summary of the invention
Present invention aim to address problems of the prior art.
To realize the present invention purpose and the technical solution adopted is that such, commercial vehicle air pressure rear axle module assembly characteristic is surveyed
Test system mainly includes pneumatic system, TT&C system and host computer.
The air pressure environment of the pneumatic system simulation air pressure rear axle module assembly.
The pneumatic system mainly includes gas source, gas source three linked piece, gas receiver I, solenoid directional control valve, electric Proportion valve, storage
Inflator II, exemplar, gas receiver III, manual pressure regulating valve and gas receiver IV.
The gas source, gas source three linked piece, gas receiver I, solenoid directional control valve, electric Proportion valve, gas receiver II, exemplar and gas storage
Cylinder III is sequentially connected by tracheae.
The gas receiver I, manual pressure regulating valve, gas receiver IV and exemplar are sequentially connected by tracheae.
The gas source conveys gas to gas receiver I by gas source three linked piece.
The gas receiver I conveys gas to gas receiver II by solenoid directional control valve and electric Proportion valve.
The gas receiver I conveys gas to gas receiver IV by manual pressure regulating valve.
The solenoid directional control valve receives the digital voltage pulse signal I of D/A switch chip, so that it is defeated to control gas receiver I
It supplies gas direction, flow and the speed of body.
The pulse voltage signal II of the electric Proportion valve receiving relay, to control the stream of gas receiver I conveying gas
Amount and speed.
The gas receiver II conveys gas to exemplar.
The gas receiver IV conveys gas to exemplar.
The exemplar is to gas receiver III discharge gas.
The intake valve of the exemplar controls and receives the flow and speed of gas according to pulse voltage signal III.
The air outlet valve of the exemplar controls the flow and speed of discharge gas according to pulse voltage signal IV.
The exemplar is air pressure rear axle module assembly.
The characteristic of the TT&C system measurement air pressure rear axle module assembly.
The TT&C system mainly includes crystal oscillating circuit, reset circuit, single-chip microcontroller, D/A switch chip, relay driving
Chip, relay, air inlet relay, exhaust relay, baroceptor and data acquisition device
The crystal oscillating circuit provides clock signal for single-chip microcontroller, so that single-chip microcontroller be driven to send mould to D/A switch chip
Quasi- voltage pulse signal I sends driving signal to relay driving chip.
The reset circuit resets single-chip microcontroller.
Analog voltage pulse signal I is converted to digital voltage pulse signal I by the D/A switch chip, and is sent to
Solenoid directional control valve.
The relay driving chip drives relay is to electric Proportion valve transfer pulse voltage signal II.
The relay driving chip drives air inlet relay is to exemplar and data acquisition device transfer pulse voltage signal
III。
The relay driving chip drives are vented relay to exemplar and data acquisition device transfer pulse voltage signal
IV。
The air pressure signal of the baroceptor monitoring exemplar discharge gas, and it is sent to data acquisition device.
Air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to upper by the data acquisition device
Machine.
The host computer handles air pressure signal, pulse voltage signal III and pulse voltage signal IV, obtains air pressure
Rear axle module assembly characteristic, the i.e. relation curve of air pressure and time.
Using the method for commercial vehicle air pressure rear axle module assembly characteristic test system, mainly comprise the steps that
1) commercial vehicle air pressure rear axle module assembly characteristic test system is built.
2) crystal oscillating circuit provides clock signal for single-chip microcontroller, simulates so that single-chip microcontroller be driven to send to D/A switch chip
Voltage pulse signal I sends driving signal to relay driving chip.
3) analog voltage pulse signal I is converted to digital voltage pulse signal I by D/A switch chip, and is sent to electricity
Magnetic reversal valve.
4) relay driving chip drives relay is to electric Proportion valve transfer pulse voltage signal II.
The relay driving chip drives air inlet relay is to exemplar and data acquisition device transfer pulse voltage signal
III。
The relay driving chip drives are vented relay to exemplar and data acquisition device transfer pulse voltage signal
IV。
5) gas source conveys gas to gas receiver I by gas source three linked piece.
Electric Proportion valve controls the flow and speed of gas receiver I conveying gas according to pulse voltage signal II.
Solenoid directional control valve receives the digital voltage pulse signal I of D/A switch chip, to control gas receiver I conveying gas
Direction, flow and the speed of body.
6) exemplar controls and receives the flow and speed of gas according to pulse voltage signal III.
Exemplar controls the flow and speed of discharge gas according to pulse voltage signal IV.
7) air pressure signal of baroceptor monitoring exemplar, and it is sent to data acquisition device.
8) air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to host computer by data acquisition device.
9) host computer handles air pressure signal, pulse voltage signal III and pulse voltage signal IV, after obtaining air pressure
Bridge module assembly characteristic, the i.e. relation curve of air pressure and time.
The solution have the advantages that unquestionable.The present invention provides the surveys of commercial vehicle air pressure rear axle module assembly characteristic
Test system and method are mainly main with the static characteristic of air pressure rear axle module assembly, dynamic characteristic, response characteristic and regulatory function
Test content.The present invention can be arranged different test air pressures according to specific test requirements document, and lower computer hardware control system can be with
Air pressure rear axle module assembly, which is arranged, is having ABS to participate in the boosting ladder quantity in braking process, decompression ladder quantity and air inlet
The power off time of solenoid valve and exhaust solenoid valve；Simultaneously, the present invention can simulate air pressure rear axle module assembly and routinely make
It is dynamic and there is ABS system to continue working two kinds of operating modes, in addition data acquisition device can precisely record in real time test air pressure, into
The relation curve of exhaust solenoid valve pulse voltage and time.
Detailed description of the invention
Fig. 1 is test macro the general frame；
Fig. 2 is pneumatic part design drawing；
Fig. 3 is USB2828 pinouts；
Fig. 4 is pneumatic system and TT&C system hardware system circuit diagram；
Fig. 5 is data acquisition flow figure；
Fig. 6 is system schematic；
In figure: host computer 3, gas source 101, gas source three linked piece 102, gas receiver I103, solenoid directional control valve 104, electrical ratio
Valve 105, gas receiver II106, exemplar 107, gas receiver III108, manual pressure regulating valve 109, gas receiver IV110, crystal oscillating circuit 201,
Reset circuit 202, single-chip microcontroller 203, D/A switch chip 204, relay driving chip 205, relay 206, air inlet relay
207, relay 208, baroceptor 209 and data acquisition device 210 are vented.
Specific embodiment
Below with reference to embodiment, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, should all include within the scope of the present invention.
Embodiment 1:
Referring to Fig. 1 to Fig. 6, commercial vehicle air pressure rear axle module assembly characteristic test system mainly includes pneumatic system, observing and controlling
System and host computer 3.
The air pressure environment of the pneumatic system simulation air pressure rear axle module assembly.
The pneumatic system mainly includes gas source 101, gas source three linked piece 102, gas receiver I103, solenoid directional control valve 104, electricity
Gas proportioning valve 105, gas receiver II106, exemplar 107, gas receiver III108, manual pressure regulating valve 109 and gas receiver IV110.
During conventional brake, according to QC/T 35-2015 " automobile and trailer Pneumatic controller performance requirement and platform
Frame test method " in corresponding requirements, the total measurement (volume) of auxiliary piping is less than 0.15L in a test gas circuit, select in test in
Diameter is the air-brake coupling hose of 12mm.In the braking process for thering is ABS to intervene, according to QC/T 1006-2015 " Automobile Anti-lock Braking system
Unite air pressure electromagnetic regulator performance requirement and Bench test methods " in concrete regulation, exemplar gas outlet between 1L air accumulator,
Reversal valve should be coupled with the compressed-air hose of φ 12 × 1.5, long 500mm, reversal valve respectively between exemplar air inlet
Nominal bore diameter be φ 10mm, connection not identified pipeline nominal bore diameter is that φ 12mm, length should be no more than 300mm.
The gas source 101, gas source three linked piece 102, gas receiver I103, solenoid directional control valve 104, electric Proportion valve 105, gas storage
Cylinder II106, exemplar 107 and gas receiver III108 are sequentially connected by tracheae.
The gas receiver I103, manual pressure regulating valve 109, gas receiver IV110 and exemplar 107 are sequentially connected by tracheae.
The gas source 101 conveys gas to gas receiver I103 by gas source three linked piece 102.
The gas receiver I103 conveys gas to gas receiver II106 by solenoid directional control valve 104 and electric Proportion valve 105.
Gas receiver I is 40L.
The gas receiver I103 conveys gas to gas receiver IV110 by manual pressure regulating valve 109.
The solenoid directional control valve 104 receives the digital voltage pulse signal I of D/A switch chip 205, to control gas storage
Direction, flow and the speed of cylinder I103 conveying gas.
The pulse voltage signal II of 105 receiving relay 208 of electric Proportion valve, to control gas receiver I103 conveying
The flow and speed of gas.
The gas receiver II106 conveys gas to exemplar 107.Gas receiver II is 10L.
The gas receiver IV210 conveys gas to exemplar 107.Gas receiver IV is 10L.
The exemplar 107 is to gas receiver III108 discharge gas.Gas receiver III is 10L.
The intake valve of the exemplar 107 controls and receives the flow and speed of gas according to pulse voltage signal III.
The air outlet valve of the exemplar 107 controls the flow and speed of discharge gas according to pulse voltage signal IV.
The exemplar 107 is air pressure rear axle module assembly.
The characteristic of the TT&C system measurement air pressure rear axle module assembly.
The TT&C system mainly includes crystal oscillating circuit 201, reset circuit 202, single-chip microcontroller 203, D/A switch chip
204, relay driving chip 205, relay 206, air inlet relay 207, exhaust relay 208,209 sum number of baroceptor
According to acquisition device 210.
Baroceptor selects power supply ± 12V, 0~1600kPa of range, precision 0.3%FS, output 0~5V normal voltage
The STZ1-1 type pressure transmitter of signal；Electric Proportion valve selects highest supply pressure 1.0MPa, input signal DC 0~5V
ITV305 type electric Proportion valve；It selects the AT89C52 single-chip microcontroller of Atmel company as core processor to lower computer system, selects
Peripheral circuit extension is carried out with LY-51S microcontroller development board；Number of the Altay USB2828 data collecting card as test macro
According to acquisition module, host computer application LabVIEW2014 programmed environment carries out data analysis and processing.
The power supply that AT89C52 single-chip microcontroller uses is DC 5V, and wherein positive pole connects 40 pins, and power cathode (ground) connects 20
Pin.Crystal oscillating circuit use 12MHz crystal oscillator, starting of oscillation capacitor use 30pF ceramic disc capacitor, connect respectively single-chip microcontroller 18 pins, 19
Pin.Reset circuit is made of 10uF electrolytic capacitor and 10k resistance, connects 9 pins of single-chip microcontroller.EA pin meets positive pole, P0
Mouth is open circuit output, need to add pull-up resistor when as output use, resistance value generally use 1k.
Solenoid valve commutation and pulse voltage driving circuit are to realize assembly input electromagnetic valve of gas circuit commutation and simulation output ABS
The circuit system of pulse voltage signal is mainly made of ULN2003, relay KM and SSR solid-state relay.Wherein, ULN2003
9 pins connect+5V power supply, 8 pins connect on cathode (ground), and 1 pin, 2 pins, 3 pins, 4 pins, 5 pins connect single-chip microcontroller respectively
39 pins, 38 pins, 37 pins, 36 pins, 35 pins.Control relay is for controlling solenoid directional control valve, SSR solid-state relay
Device is used for control pressure rear axle module assembly inlet and outlet solenoid valve.
Electric Proportion valve driving circuit main function is to be converted to the digital signal of slave computer minimum system circuit output
Analog signal, core are PCF8591 analog-digital chips, and 1~8 pin of PCF8591 all connects on cathode (ground), 14,16 pins connect+
5V power supply, 12,13 pins connect on cathode (ground), and 9,10 pins connect the 22 of single-chip microcontroller, 21 pins, and 15 pins are straight as analog input
Access electric Proportion valve.
USB2828 data collecting card mainly acquires the pulse voltage signal of air pressure rear axle module assembly inlet and outlet solenoid valve
With the air pressure signal of output.Jumper wire device JP3, JP4, JP5 are adjusted, selecting AD analog signal input grounding mode is single ended input side
Formula；Jumper wire device JP1, JP2 are adjusted, AD analog signal input range ± 5V is selected.The inlet and outlet electromagnetism of air pressure rear axle module assembly
The pulse voltage signal of valve is respectively connected to 19,37,18,36 pins of USB2828 data collecting card, the air pressure signal access of output
17 pins of USB2828 data collecting card, cathode (ground) line are uniformly accessed into 29 pins of simulation ground.
The crystal oscillating circuit 201 is that single-chip microcontroller 202 provides clock signal, to drive single-chip microcontroller 202 to D/A switch core
Piece 205 sends analog voltage pulse signal I, sends driving signal to relay driving chip 205.
The reset circuit 202 resets single-chip microcontroller 203.
Analog voltage pulse signal I is converted to digital voltage pulse signal I by the D/A switch chip 204, and is sent
To solenoid directional control valve 104.
The relay driving chip 205 drives relay 206 to 105 transfer pulse voltage signal II of electric Proportion valve.
The relay driving chip 205 drives air inlet relay 207 to transmit to exemplar 107 and data acquisition device 210
Pulse voltage signal III.
The driving of the relay driving chip 205 exhaust relay 208 is transmitted to exemplar 107 and data acquisition device 210
Pulse voltage signal IV.
The baroceptor 209 monitors the air pressure signal of 107 discharge gas of exemplar, and is sent to data acquisition device
210。
Air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to by the data acquisition device 210
Position machine 3.
The host computer 3 handles air pressure signal, pulse voltage signal III and pulse voltage signal IV, obtains gas
Press rear axle module assembly characteristic, the i.e. relation curve of air pressure and time.
Embodiment 2:
Using the method for commercial vehicle air pressure rear axle module assembly characteristic test system, mainly comprise the steps that
1) commercial vehicle air pressure rear axle module assembly characteristic test system is built.
2) crystal oscillating circuit 201 is that single-chip microcontroller 202 provides clock signal, to drive single-chip microcontroller 202 to D/A switch chip
205 send analog voltage pulse signal I, send driving signal to relay driving chip 205.
3) analog voltage pulse signal I is converted to digital voltage pulse signal I by D/A switch chip 204, and is sent to
Solenoid directional control valve 104.
4) relay driving chip 205 drives relay 206 to 105 transfer pulse voltage signal II of electric Proportion valve.
The relay driving chip 205 drives air inlet relay 207 to transmit to exemplar 107 and data acquisition device 210
Pulse voltage signal III.
The driving of the relay driving chip 205 exhaust relay 208 is transmitted to exemplar 107 and data acquisition device 210
Pulse voltage signal IV.
5) gas source conveys gas to gas receiver I103 by gas source three linked piece 102.
6) exemplar 107 controls and receives the flow and speed of gas according to pulse voltage signal III.
Exemplar 107 controls the flow and speed of discharge gas according to pulse voltage signal IV.
7) baroceptor 209 monitors the air pressure signal of exemplar 107, and is sent to data acquisition device 210.
8) air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to upper by data acquisition device 210
Machine 3.
9) host computer 3 handles air pressure signal, pulse voltage signal III and pulse voltage signal IV, obtains air pressure
Rear axle module assembly characteristic, the i.e. relation curve of air pressure and time.
Measuring air pressure rear axle module assembly static characteristic: manual pressure regulating valve 109 is adjusted, exemplar air inlet stable gas pressure is made to exist
Rated operating pressure opens solenoid directional control valve 104, adjusts electric Proportion valve 105, makes control mouth input air pressure from zero slowly boosting
To rated operating pressure, delivery outlet air pressure is recorded with the relation curve of control mouth air pressure change；
Measuring air pressure rear axle module assembly dynamic characteristic: the baroceptor 209 of the delivery outlet of exemplar 107 is connected into data
Acquisition device.Adjusting manual pressure regulating valve 109 makes exemplar air inlet stable gas pressure in rated operating pressure, opens solenoid directional control valve
104, electric Proportion valve 105 is adjusted, increase with the rate greater than 2MPa/s control mouth air pressure, after pressure stabilizing 1min, makes control mouth
Air pressure is declined with the rate greater than 2MPa/s, the relation curve that record delivery outlet air pressure changes over time.
Measuring air pressure rear axle module assembly response characteristic: being inflated to rated operating pressure from 107 air inlet of exemplar, and by sample
Part 107 is connected with lower computer hardware control system, operates controller, makes air pressure rear axle module assembly with " decompression state (t1=
The mode of 500ms) → state of pressure keeping (t2=100ms) → pressure-increasning state (t3=500ms) " works, and acts 5 times altogether,
And record the relation curve of exemplar delivery outlet atmospheric pressure value and time in last time action process.
Measuring air pressure rear axle module assembly regulatory function: being inflated to rated operating pressure from 107 air inlet of exemplar, and by sample
Part 107 is connected with lower computer hardware control system, operates controller, makes air pressure rear axle module assembly with " decompression state (t1=
(pressure rising time of each ladder is 12ms to the boosting of 500ms) → state of pressure keeping (t2=100ms) → 12 time ladder, the dwell time is
(dip time of each ladder is 22ms to 100ms) → pressure-increasning state (t3=400ms) → 7 time step-decreasing voltage, the dwell time is
The mode of 100ms) → decompression state (t4=500ms) → state of pressure keeping (t5=100ms) → pressure-increasning state (t6=500ms) "
It works, while recording the relation curve of the air pressure of exemplar delivery outlet and time.
Claims (4)
1. commercial vehicle air pressure rear axle module assembly characteristic test system, which is characterized in that mainly include pneumatic system, TT&C system
With the host computer (3).
The air pressure environment of the pneumatic system simulation air pressure rear axle module assembly；
The pneumatic system mainly includes gas source (101), gas source three linked piece (102), gas receiver I (103), solenoid directional control valve
(104), electric Proportion valve (105), gas receiver II (106), exemplar (107), gas receiver III (108), manual pressure regulating valve (109)
With gas receiver IV (110)；
The gas source (101) conveys gas to gas receiver I (103) by gas source three linked piece (102)；
The gas receiver I (103) conveys gas to gas receiver II (106) by solenoid directional control valve (104) and electric Proportion valve (105)
Body；
The gas receiver I (103) conveys gas to gas receiver IV (110) by manual pressure regulating valve (109)；
The solenoid directional control valve (104) receives the digital voltage pulse signal I of D/A switch chip (205), to control gas storage
Cylinder I (103) conveys direction, flow and the speed of gas；
The pulse voltage signal II of electric Proportion valve (105) receiving relay (208), so that it is defeated to control gas receiver I (103)
It supplies gas the flow and speed of body；
The gas receiver II (106) conveys gas to exemplar (107)；
The gas receiver IV (210) conveys gas to exemplar (107)；
The exemplar (107) is to gas receiver III (108) discharge gas；
The intake valve of the exemplar (107) controls and receives the flow and speed of gas according to pulse voltage signal III；
The air outlet valve of the exemplar (107) controls the flow and speed of discharge gas according to pulse voltage signal IV；
The characteristic of the TT&C system measurement air pressure rear axle module assembly；
The TT&C system mainly includes crystal oscillating circuit (201), reset circuit (202), single-chip microcontroller (203), D/A switch chip
(204), relay driving chip (205), relay (206), air inlet relay (207), exhaust relay (208), air pressure transmission
Sensor (209) and data acquisition device (210)
The crystal oscillating circuit (201) is that single-chip microcontroller (202) provide clock signal, to drive single-chip microcontroller (202) to D/A switch
Chip (205) sends analog voltage pulse signal I, sends driving signal to relay driving chip (205)；
The reset circuit (202) resets single-chip microcontroller (203)；
Analog voltage pulse signal I is converted to digital voltage pulse signal I by the D/A switch chip (204), and is sent to
Solenoid directional control valve (104)；
The relay driving chip (205) drives relay (206) to electric Proportion valve (105) transfer pulse voltage signal
II；
The relay driving chip (205) drives air inlet relay (207) to exemplar (107) and data acquisition device (210)
Transfer pulse voltage signal III；
Relay driving chip (205) driving is vented relay (208) to exemplar (107) and data acquisition device (210)
Transfer pulse voltage signal IV；
The air pressure signal of described baroceptor (209) monitoring exemplar (107) discharge gas, and it is sent to data acquisition device
(210)；
Air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to upper by the data acquisition device (210)
Machine (3)；
The host computer (3) handles air pressure signal, pulse voltage signal III and pulse voltage signal IV, obtains air pressure
Rear axle module assembly characteristic, the i.e. relation curve of air pressure and time.
2. commercial vehicle air pressure rear axle module assembly characteristic test system according to claim 1 and method, it is characterised in that:
The exemplar (107) is air pressure rear axle module assembly.
3. commercial vehicle air pressure rear axle module assembly characteristic test system according to claim 1 or 2 and method, feature exist
In: the gas source (101), gas source three linked piece (102), gas receiver I (103), solenoid directional control valve (104), electric Proportion valve
(105), gas receiver II (106), exemplar (107) and gas receiver III (108) are sequentially connected by tracheae；
The gas receiver I (103), manual pressure regulating valve (109), gas receiver IV (110) and exemplar (107) are successively connected by tracheae
It connects.
4. using the method for commercial vehicle air pressure rear axle module assembly characteristic test system described in claims 1 to 33, feature exists
In mainly comprising the steps that
1) commercial vehicle air pressure rear axle module assembly characteristic test system is built；
2) crystal oscillating circuit (201) is that single-chip microcontroller (202) provide clock signal, to drive single-chip microcontroller (202) to D/A switch core
Piece (205) sends analog voltage pulse signal I, sends driving signal to relay driving chip (205)；
3) analog voltage pulse signal I is converted to digital voltage pulse signal I by D/A switch chip (204), and is sent to electricity
Magnetic reversal valve (104)；
4) relay driving chip (205) drives relay (206) to electric Proportion valve (105) transfer pulse voltage signal II；
The relay driving chip (205) drives air inlet relay (207) to exemplar (107) and data acquisition device (210)
Transfer pulse voltage signal III；
Relay driving chip (205) driving is vented relay (208) to exemplar (107) and data acquisition device (210)
Transfer pulse voltage signal IV；
5) gas source conveys gas to gas receiver I (103) by gas source three linked piece (102)；
Electric Proportion valve (105) controls the flow and speed of gas receiver I (103) conveying gas according to pulse voltage signal II；
Solenoid directional control valve (104) receives the digital voltage pulse signal I of D/A switch chip (205), to control gas receiver I
(103) direction, flow and the speed of gas are conveyed；
6) exemplar (107) controls and receives the flow and speed of gas according to pulse voltage signal III；
Exemplar (107) controls the flow and speed of discharge gas according to pulse voltage signal IV；
7) air pressure signal of baroceptor (209) monitoring exemplar (107), and it is sent to data acquisition device (210)；
8) air pressure signal, pulse voltage signal III and pulse voltage signal IV are sent to host computer by data acquisition device (210)
(3)；
9) host computer (3) handles air pressure signal, pulse voltage signal III and pulse voltage signal IV, after obtaining air pressure
Bridge module assembly characteristic, the i.e. relation curve of air pressure and time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148834.XA CN109882472B (en) | 2019-02-28 | 2019-02-28 | System and method for testing characteristics of pneumatic rear axle module assembly of commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148834.XA CN109882472B (en) | 2019-02-28 | 2019-02-28 | System and method for testing characteristics of pneumatic rear axle module assembly of commercial vehicle |
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| CN109882472A true CN109882472A (en) | 2019-06-14 |
| CN109882472B CN109882472B (en) | 2020-06-05 |
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| CN107782561A (en) * | 2016-08-25 | 2018-03-09 | 张桂春 | A kind of aircraft brake assemblies intelligent testing test stand |
| CN108107876A (en) * | 2018-01-29 | 2018-06-01 | 吉林大学 | Commercial car electric brake system hardware-in-the-loop test platform and test method based on TTC580 controllers |
| CN108120606A (en) * | 2018-01-29 | 2018-06-05 | 吉林大学 | Commercial car electric brake system hardware-in-the-loop test platform and test method based on PXI and cRIO controllers |
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| CN102607960A (en) * | 2012-04-16 | 2012-07-25 | 公安部天津消防研究所 | Measurement and control system for hydraulic test |
| CN203298937U (en) * | 2013-05-20 | 2013-11-20 | 苏州锦鹏机电设备制造有限公司 | Valve test pressure source |
| CN107782561A (en) * | 2016-08-25 | 2018-03-09 | 张桂春 | A kind of aircraft brake assemblies intelligent testing test stand |
| CN107655761A (en) * | 2017-10-30 | 2018-02-02 | 上海应用技术大学 | Rupture disk pressure release test system and method |
| CN108107876A (en) * | 2018-01-29 | 2018-06-01 | 吉林大学 | Commercial car electric brake system hardware-in-the-loop test platform and test method based on TTC580 controllers |
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