CN104275995A - System for testing field performance of tire pressure monitoring system (TPMS) - Google Patents
System for testing field performance of tire pressure monitoring system (TPMS) Download PDFInfo
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- CN104275995A CN104275995A CN201310291440.2A CN201310291440A CN104275995A CN 104275995 A CN104275995 A CN 104275995A CN 201310291440 A CN201310291440 A CN 201310291440A CN 104275995 A CN104275995 A CN 104275995A
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Abstract
The invention belongs to the technical field of automobile testing, particularly relates to a system for testing field performance of a tire pressure monitoring system (TPMS) and aims at solving the problem that field performance of an automobile cannot be tested during road driving in the prior art. The system is characterized by comprising an actuator and a controller, wherein the actuator is used for measuring the internal pressure of all tires in real time and transmitting pressure signals to the controller, and signals indicating tire pressure in a driving state are generated under the control of control signals of the controller; the controller receives the tire pressure signals sent from the actuator, the tire pressure signals are processed according to set control flow, and then control signals are sent to the actuator to control the actuator to act to complete measurement and regulation of tire pressure. According to the system provided by the invention, a tire pressure closed-loop control system based on a practical gas circuit is established by virtue of the actuator and the controller, closed-loop regulation is performed on the gas circuit according to a difference between target tire pressure and current tire pressure, and thus a driving pressure regulation function is achieved under the condition of generating no communication interference.
Description
Technical field
The invention belongs to Automobile Measuring Techniques field, be specifically related to a kind of system for monitoring pressure in tyre real vehicle Performance Test System.
Background technology
Tire pressure monitoring system (TPMS) starts to obtain the increasing concern of society as automobile active safety parts, according to traffic accident investigation display, many traffic accidents are that (air pressure is too high due to tire pressure problem, too low, rapid air leakage) cause: the too low traveling of tire pressure, the friction force on tire and ground significantly increases, tire temperature sharply raises, tire deliquescing, intensity declines, make the weak part sidewall of tire constantly be squeezed and stretch, easily cause fatigue failure, blow out.Even if low speed driving, also can injure tire, and this injury is long for incubation, disguised large, more there is harmfulness, bury for during later high speed traveling hidden danger of blowing out.For the current tubeless tires (i.e. radial-ply tyre) generally used: in order to improve the intensity of tire, be added with layer of steel wire in its carcass plies periphery.The tire intensity of this structure is high, good heat dissipation, adapts to run at high speed, but it is afraid of to run flat most.When tire deflation travels, except tire and ground friction heat-dissipating, the steel wire in carcass and also can frictional heat between tire, super heat can accelerate steel wire and rubber aging, be out of shape, even internal break is so that tomography, causes tire intensity to be destroyed, buries the hidden danger of blowing out; The too high traveling of tire pressure, the meeting accelerated wear test of tyre crown position, the weak part on crown and sidewall is encountered sharp objects and is also easily blown out.Vehicle high-speed travels for a long time in addition, and the reason such as lower long slope braking, overload also can cause wheel hub and tyre temperature raise and then cause abnormality in tire air-pressure to increase, and increases the probability of blowing out; Compare tire pressure too low and too high, rapid air leakage of tyre is a kind of more dangerous situation (such as tire is pricked aperture), as long as rapid air leakage state is there is general, tire pressure can be reduced to zero at short notice, this is abnormally dangerous for the vehicle of running at high speed, if rapid air leakage of tyre can be found ahead of time, even within one minute, be all very valuable ahead of time.The inspection of chaufeur ramp to stop can be reminded like this, occur to avoid accident to lose control of one's vehicle.In the world, the safety misadventure that tire pressure problem causes, occupies sizable ratio.Show according to United States highways Public Security Department (NHTSA) data, 414 people are caused to lose one's life in the tire accident that the U.S. is annual, 10275 people are injured, the accident of blowing out of 20% is caused by air pressure deficiency, cause huge economic loss, therefore United States Government requires that automaker installs tyre pressure detecting system additional, this system is mainly used in automatically monitoring tire pressure in real time when running car, tire flat and infrabar are reported to the police, with guarantee driving safety, it is the life security guarantee forewarn system of motorist, rider.
Current state increases gradually built with the automobile of TPMS, the domestic and international enterprise of selling TPMS at home is also developing rapidly, and manufacturing enterprise and the brand of famous foreign have: happiness Lay obtains (Schrader), Li Er (Lear), Beru (Beru), continent (the former Siemens VDO of Continental), Bosch (bosch), Wei Boke (wabco).Domestic more well-known enterprise and brand have: upper Haitai is good, Shanghai is protected grand, it is special that peace is sailed in Suzhou, Shenzhen Hangsheng, Henan Tian Hai etc., in addition, a large amount of small-and medium-brands are also had to be active in rear dress market, and be also that a hundred flowers blossom in product variety and pattern, the existing direct-type installing pressure sensor based on inside tires additional of its principle of work, also the indirect type based on measuring vehicle left and right wheel speed estimation tire pressure is had, for specification situation is responsible for, the TPMS market that the scale of construction expands, country put into effect standard GB/T/T26149 " the air pressure of automobile tire checking system based on tire pressure monitoring module " in 2011, propose undervoltage warning wherein, over voltage alarm, rapid air leakage is reported to the police, Static and dynamic accepts the multinomial requirements such as performance, and time of fire alarming index is risen to 10 seconds, comparatively Overseas Correlative Standards is more harsh.This just proposes new requirement to TPMS Performance Test System, from market study and patent applied for, tradition TPMS Performance Test System for be the detection of parts level, use pressure simulation, signal imitation, the multiple simulation means such as temperature simulation completes the Performance Detection before to TPMS entrucking in laboratory, this on the one hand cannot the complicated real vehicle environment of simulating vehicle when road driving, cannot reach on the other hand and dynamically accept the multinomial Detection of contents such as performance in China's national standard, thus demand is proposed to novel tire pressure monitor system (TPMS) real vehicle Performance Test System.At present, not yet have and can realize in road vehicle driving process, tire pressure monitoring system is carried out to the High Precision Automatic closed loop pressure regulation test macro of real vehicle performance testing.
Summary of the invention
Object of the present invention solves the problem that prior art cannot realize vehicle real vehicle performance testing when road driving, provides a kind of system for monitoring pressure in tyre real vehicle Performance Test System.
The technical solution used in the present invention:
A kind of system for monitoring pressure in tyre real vehicle Performance Test System, it comprises actuating unit and controller; Actuating unit measures whole inner tyre pressure in real time, and pressure signal is sent to controller, realizes the tire pressure signal under driving states under the control of the control signal of controller; Controller receives the tire pressure signal that actuating unit sends, and the control flow according to setting processes, and transmits control signal to actuating unit, controls actuating unit action, completes the measurement to tire pressure and pressure regulation.
Actuating unit as above comprises wheel limit assembly and pressure adjusting part;
Wheel limit assembly comprises pressure adjusting part interface, tire pressure interface and rotates a point air parcel; Wheel limit assembly is coaxially fixed on outside tire through wheel hub installing port and screw cap for tire; Tire pressure interface is communicated with cranked tire valve, rotates air parcel axis and is connected with pressure adjusting part interface;
Pressure adjusting part comprises air pump, bleed pressure table, pressure charging valve, blowdown valve, pressure sensor and compression indicator; Pressure adjusting part tire pressure input end and tire pressure orifice; The input end of blowdown valve is connected with tire pressure input end, and the mouth of blowdown valve is connected with exhausr port, and the control signal input end of blowdown valve is connected with controller; The input end of pressure charging valve is connected with air pump by gas source interface, and the mouth of pressure charging valve is connected with tire pressure input end, and the control signal input end of pressure charging valve is connected with controller; Pressure sensor and compression indicator are arranged on the pipeline of fifth wheel tire pressure input end and blowdown valve input end, and pressure sensor is connected with controller with manometric mouth, and the pressure signal collected is transferred to controller;
Controller receives from pressure sensor and manometric tire pressure signal, and the control flow according to setting processes, and transmits control signal to the pressure charging valve in actuating unit and blowdown valve, controls it and carries out pressure adjustment.
Pressure charging valve as above, blowdown valve adopt electromagnetic valve MAC35 to realize, and pressure sensor adopts TURCK PT010R type pressure sensor.
In controller as above, the control flow of setting is as follows:
(1) three-way magnetic valve initialization;
Pressure charging valve and blowdown valve are closed, makes tire be in packing state;
(2) judged whether that tire is demarcated;
Whether be 0 according to tire calibration marks position, judged whether that tire is demarcated, as do not carried out this kind of tire demarcation, then having entered step (3); If completed tire to demarcate, enter step (4);
(3) tire is demarcated;
Gather tire current pressure, make tire pressure release 10 second; Measure difference of pressure before and after pressure release, calculate pressure adjusting COEFFICIENT K; Then change tire calibration marks position into 1;
(4) tire target calculation of pressure;
According to national standard or manufacturer, needs are detected to system low-voltage or over voltage alarm, calculate tire target force value;
(5) judge whether pressure difference value is greater than permissible value;
Computation and measurement tire current pressure and goal pressure difference DELTA p, as being less than measurement permissible error, then jump to end step, otherwise enter next step;
(6) the computation delay time;
According to pressure adjusting COEFFICIENT K, calculate delay time T, its computing formula is:
(7) judge whether difference is greater than zero;
Judge whether difference DELTA p is greater than zero, if be greater than zero, open pressure charging valve, enter next step; Otherwise, open blowdown valve, enter next step;
(8) time delay;
Time delay T second, jump to step (5);
(9) test result is calculated;
Pressure adjusting finish time and corresponding tire pressure data are exported, calculates the difference of vehicle-mounted tire pressure monitoring system Output rusults and native system, obtain test result.
Judged whether tire demarcating steps in the control flow of setting in controller as above, under initial condition (IC), setting tire calibration marks position is 0.
Tire demarcating steps in the control flow of setting in controller as above, during calculating K value, carries out linear simplifiation by the change of tire pressure, then K is worth computing formula to be
wherein Δ P is tire pressure decreasing value in 10 seconds.
Tire target calculation of pressure step in the control flow of setting in controller as above, when carrying out low pressure alarming and detecting, 75% of established standards cold conditions atmospheric pressure value is tire target force value, when carrying out over voltage alarm and detecting, 125% of established standards cold conditions atmospheric pressure value is tire target force value.
Judge whether pressure difference value is greater than permissible value step in the control flow of setting in controller as above, pressure survey permissible error is 8.5kPa.
The invention has the beneficial effects as follows:
By the wheel limit assembly in actuating unit, use and rotate a point device of air, inside tires gas in rotating is introduced in car by tire tube valve and controls, thus evade falling in traditional test means and adopt wireless transmission scheme to disturb the communication of system for monitoring pressure in tyre.In pressure adjusting part pressure transformer, pressure charging valve and blowdown valve basis on, use controller to complete and control the closed loop air pressure of each wheel, compared with controlling with traditional hand control valve (HCV), reproducible, precision is high, is more suitable for the test of system for monitoring pressure in tyre.
Accompanying drawing explanation
Fig. 1 is the wheel limit unit construction schematic diagram of a kind of system for monitoring pressure in tyre real vehicle Performance Test System actuating unit of the present invention;
Fig. 2 is the pressure adjusting part structural representation of a kind of system for monitoring pressure in tyre real vehicle Performance Test System actuating unit of the present invention;
In figure, 1. pressure adjusting part interface, 2. wheel hub installing port, 3. tire pressure interface, 4. rotate a point air parcel, 5. air pump, 6. gas source interface, 7. bleed pressure table, 8. pressure charging valve, 9. blowdown valve, 10. exhausr port, 11. pressure sensors, 12. compression indicators, 13. tire pressure input ends.
Detailed description of the invention
Below in conjunction with drawings and Examples, a kind of system for monitoring pressure in tyre real vehicle Performance Test System of the present invention is described further:
A kind of system for monitoring pressure in tyre real vehicle Performance Test System, comprises actuating unit and controller.Wherein, actuating unit measures whole inner tyre pressure in real time, and pressure signal is sent to controller, realizes the tire pressure signal under driving states under the control of the control signal of controller.Controller receives the tire pressure signal that actuating unit sends, and the control flow according to setting processes, and transmits control signal to actuating unit, controls actuating unit action, completes the measurement to tire pressure and pressure regulation.
In the present embodiment, actuating unit comprises wheel limit assembly and pressure adjusting part, and wheel limit assembly is coaxially fixed on outside tire through wheel hub installing port 2 and screw cap for tire, and wheel limit assembly comprises pressure adjusting part interface 1, tire pressure interface 3 and rotates a point air parcel 4.Wherein, tire pressure interface 3 is directly communicated with cranked tire valve, the inside tires gas that tire pressure interface 3 imports is reached rotation point air parcel 4 axis in rotation of wheel process by rotating a point air parcel 4.Rotate air parcel axis after being connected with pressure adjusting part interface 1, can in tire rotation process, overcome Micro-friction resistance and keep static, thus by inside tires gas stable transfer to actionless tire pressure interface 1.
Pressure adjusting part comprises air pump 5, bleed pressure table 7, pressure charging valve 8, blowdown valve 9, pressure sensor 11 and compression indicator 12.Pressure adjusting part tire pressure input end 13 is communicated with tire pressure interface 1 by flexible pipe.The input end of blowdown valve 9 is connected with tire pressure input end 13, the mouth of blowdown valve 9 is connected with exhausr port 10, its control signal input end is connected with controller, receive the control signal that self-controller sends, be communicated with in the Millisecond time when receiving controller signals and tire is exhausted.The input end of pressure charging valve 8 is connected with air pump 5 by gas source interface 6, the mouth of pressure charging valve 8 is connected with tire pressure input end 13, its control signal input end is connected with controller, receive the control signal (specifically how connecting) that self-controller sends, it can be communicated with in the Millisecond time when receiving controller signals inflates tire.Pressure sensor 11 and compression indicator 12 are arranged on fifth wheel tire pressure input end 13 with on the pipeline of blowdown valve 8 input end, their mouth is connected with controller, the pressure of monitor force adjusting part tire pressure input end 13, and pressure signal is transferred to controller.
Pressure charging valve, blowdown valve all adopt electromagnetic valve MAC35 to realize, and pressure sensor adopts TURCK PT010R type pressure sensor.
Controller receives the tire pressure signal from pressure sensor 11 and compression indicator 12, control flow according to setting processes, and transmit control signal to the pressure charging valve 8 in actuating unit and blowdown valve 9, control it and carry out pressure adjustment, realize the accurate control to tire pressure.In controller, the control flow of setting is as follows:
(1) three-way magnetic valve initialization;
Pressure charging valve 8 and blowdown valve 9 are closed, makes tire be in packing state.
(2) judged whether that tire is demarcated;
Whether be 0 according to tire calibration marks position, judged whether that tire is demarcated, as do not carried out this kind of tire demarcation, then having entered step (3); If completed tire to demarcate, enter step (4).Generally speaking, under initial condition (IC), setting tire calibration marks position is 0.
(3) tire is demarcated;
Gather tire current pressure, make tire pressure release 10 second.Measure difference of pressure before and after pressure release, calculate pressure adjusting COEFFICIENT K.
During calculating K value, linear simplifiation is carried out in the change of tire pressure, then K is worth computing formula to be
wherein Δ P is tire pressure decreasing value in 10 seconds.Then change tire calibration marks position into 1.
(4) tire target calculation of pressure;
According to national standard or manufacturer, needs are detected to system low-voltage or over voltage alarm, calculate tire target force value.As: when carrying out low pressure alarming and detecting, 75% of established standards cold conditions atmospheric pressure value is tire target force value, and when carrying out over voltage alarm and detecting, 125% of established standards cold conditions atmospheric pressure value is tire target force value.Standard cold conditions atmospheric pressure value is common practise.
(5) judge whether pressure difference value is greater than permissible value;
Computation and measurement tire current pressure and goal pressure difference DELTA p, as being less than measurement permissible error, then jump to end step, otherwise enter next step.Measure permissible error to choose according to actual needs, as in GB/T26149, pressure survey permissible error is 8.5kPa.
(6) the computation delay time;
According to pressure adjusting COEFFICIENT K, calculate delay time T, its computing formula is:
(7) judge whether difference is greater than zero;
Judge whether difference DELTA p is greater than zero, if be greater than zero, open pressure charging valve, enter next step; Otherwise, open blowdown valve, enter next step.
(8) time delay;
Time delay T second, jump to step (5).
(9) test result is calculated;
Complete control flow, pressure adjusting finish time and corresponding tire pressure data are exported, adopt prior art to calculate the difference of vehicle-mounted tire pressure monitoring system Output rusults and native system, obtain test result, complete the performance testing of system for monitoring pressure in tyre real vehicle.
Controller adopts prior art to realize in conjunction with above-mentioned functions, realizes as utilized industrial computer or microcomputer.
The present invention adopts actuating unit and controller, establish the tire pressure closed loop control system based on actual gas circuit, use and rotate a point device of air, can the inside tires gas in rotation be introduced in car by tire tube valve, pressure sensor is used to measure in real time whole inner tyre pressure, in the gas circuit of every tires, install supercharging and pressure release electromagnetic valve additional simultaneously, when pressure adjustment is carried out in hope, according to the difference of target tire pressure and present tire pressure, electromagnetic valve is utilized to carry out closed loop adjustment to gas circuit, thus when not producing communication interference, realize driving voltage regulation function.
Claims (8)
1. a system for monitoring pressure in tyre real vehicle Performance Test System, is characterized in that: it comprises actuating unit and controller; Actuating unit measures whole inner tyre pressure in real time, and pressure signal is sent to controller, realizes the tire pressure signal under driving states under the control of the control signal of controller; Controller receives the tire pressure signal that actuating unit sends, and the control flow according to setting processes, and transmits control signal to actuating unit, controls actuating unit action, completes the measurement to tire pressure and pressure regulation.
2. device according to claim 1, is characterized in that: described actuating unit comprises wheel limit assembly and pressure adjusting part;
Wheel limit assembly comprises pressure adjusting part interface (1), tire pressure interface (3) and rotates a point air parcel (4); Wheel limit assembly is coaxially fixed on outside tire through wheel hub installing port (2) and screw cap for tire; Tire pressure interface (3) is communicated with cranked tire valve, rotates air parcel axis and is connected with pressure adjusting part interface (1);
Pressure adjusting part comprises air pump (5), bleed pressure table (7), pressure charging valve (8), blowdown valve (9), pressure sensor (11) and compression indicator (12); Pressure adjusting part tire pressure input end (13) is communicated with tire pressure interface (1); The input end of blowdown valve (9) is connected with tire pressure input end (13), and the mouth of blowdown valve (9) is connected with exhausr port (10), and the control signal input end of blowdown valve (9) is connected with controller; The input end of pressure charging valve (8) is connected with air pump (5) by gas source interface (6), and the mouth of pressure charging valve (8) is connected with tire pressure input end (13), and the control signal input end of pressure charging valve (8) is connected with controller; Pressure sensor (11) and compression indicator (12) are arranged on fifth wheel tire pressure input end (13) with on the pipeline of blowdown valve (8) input end, pressure sensor (11) is connected with controller with the mouth of compression indicator (12), and the pressure signal collected is transferred to controller;
Controller receives the tire pressure signal from pressure sensor (11) and compression indicator (12), and the control flow according to setting processes, and transmits control signal to the pressure charging valve (8) in actuating unit and blowdown valve (9), controls it and carries out pressure adjustment.
3. device according to claim 2, is characterized in that: described pressure charging valve (8), blowdown valve (9) adopt electromagnetic valve MAC35 to realize, and pressure sensor (11) adopts TURCK PT010R type pressure sensor.
4. device according to claim 2, is characterized in that: in described controller, the control flow of setting is as follows:
(1) three-way magnetic valve initialization;
Pressure charging valve (8) and blowdown valve (9) are closed, makes tire be in packing state;
(2) judged whether that tire is demarcated;
Whether be 0 according to tire calibration marks position, judged whether that tire is demarcated, as do not carried out this kind of tire demarcation, then having entered step (3); If completed tire to demarcate, enter step (4);
(3) tire is demarcated;
Gather tire current pressure, make tire pressure release 10 second; Measure difference of pressure before and after pressure release, calculate pressure adjusting COEFFICIENT K; Then change tire calibration marks position into 1;
(4) tire target calculation of pressure;
According to national standard or manufacturer, needs are detected to system low-voltage or over voltage alarm, calculate tire target force value;
(5) judge whether pressure difference value is greater than permissible value;
Computation and measurement tire current pressure and goal pressure difference DELTA p, as being less than measurement permissible error, then jump to end step, otherwise enter next step;
(6) the computation delay time;
According to pressure adjusting COEFFICIENT K, calculate delay time T, its computing formula is:
(7) judge whether difference is greater than zero;
Judge whether difference DELTA p is greater than zero, if be greater than zero, open pressure charging valve, enter next step; Otherwise, open blowdown valve, enter next step;
(8) time delay;
Time delay T second, jump to step (5);
(9) test result is calculated;
Pressure adjusting finish time and corresponding tire pressure data are exported, calculates the difference of vehicle-mounted tire pressure monitoring system Output rusults and native system, obtain test result.
5. device according to claim 4, is characterized in that: judged whether tire demarcating steps in the control flow of setting in described controller, and under initial condition (IC), setting tire calibration marks position is 0.
6. device according to claim 4, is characterized in that: the tire demarcating steps in the control flow of setting in described controller, during calculating K value, linear simplifiation is carried out in the change of tire pressure, then K is worth computing formula to be
wherein Δ P is tire pressure decreasing value in 10 seconds.
7. device according to claim 4, it is characterized in that: the tire target calculation of pressure step in the control flow of setting in described controller, when carrying out low pressure alarming and detecting, 75% of established standards cold conditions atmospheric pressure value is tire target force value, when carrying out over voltage alarm and detecting, 125% of established standards cold conditions atmospheric pressure value is tire target force value.
8. device according to claim 4, is characterized in that: judge whether pressure difference value is greater than permissible value step in the control flow of setting in described controller, and pressure survey permissible error is 8.5kPa.
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| CN109341944A (en) * | 2018-10-16 | 2019-02-15 | 中国汽车技术研究中心有限公司 | It is a kind of for testing the device and method of tire pressure monitoring system performance |
| CN111547264A (en) * | 2020-05-26 | 2020-08-18 | 中国飞机强度研究所 | Tire internal pressure measuring device and method for aviation inertia test bed |
| CN113306532A (en) * | 2021-05-24 | 2021-08-27 | 台州学院 | Vehicle braking and energy supply device and operation method thereof |
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| CN104275995B (en) | 2017-04-26 |
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Address after: 300300 68 pioneer East Road, Dongli District, Tianjin Patentee after: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER Co.,Ltd. Address before: 300300 68 pioneer East Road, Dongli District, Tianjin Patentee before: CHINA AUTOMOTIVE TECHNOLOGY & RESEARCH CENTER |
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Effective date of registration: 20190418 Address after: 022150 Third Floor, Forestry Bureau, Rear Building, Yuanlin Teachers'College, Xing'an West Street, Yakeshi City, Hulunbuir City, Inner Mongolia Autonomous Region Patentee after: CHINA AUTO CENTRAL HULENBER WINTER AUTOMOBILE TEST PLANT Co.,Ltd. Address before: 300300 68 pioneer East Road, Dongli District, Tianjin Patentee before: CHINA AUTOMOTIVE TECHNOLOGY AND RESEARCH CENTER Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 022150 Third Floor, Forestry Bureau, Rear Building, Yuanlin Teachers'College, Xing'an West Street, Yakeshi City, Hulunbuir City, Inner Mongolia Autonomous Region Patentee after: China Automotive Research Center (Hulunbuir) Co.,Ltd. Address before: 022150 Third Floor, Forestry Bureau, Rear Building, Yuanlin Teachers'College, Xing'an West Street, Yakeshi City, Hulunbuir City, Inner Mongolia Autonomous Region Patentee before: CHINA AUTO CENTRAL HULENBER WINTER AUTOMOBILE TEST PLANT Co.,Ltd. |