CN113804458B - Dynamic braking performance calibration device and calibration system for motor vehicle - Google Patents
Dynamic braking performance calibration device and calibration system for motor vehicle Download PDFInfo
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- CN113804458B CN113804458B CN202111033224.9A CN202111033224A CN113804458B CN 113804458 B CN113804458 B CN 113804458B CN 202111033224 A CN202111033224 A CN 202111033224A CN 113804458 B CN113804458 B CN 113804458B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The invention discloses a dynamic braking performance calibration device of a motor vehicle, which comprises an industrial control host, a wheel torque sensor and a wireless acquisition and transmission module; the industrial control host is configured to record a power value and a braking curve, obtain a dynamic error of the braking inspection bench through a comparison method, and then calibrate; the wheel torque sensor is arranged between the test shaft of the test vehicle and the wheel hub; the wireless acquisition and transmission module is arranged on the wheel torque sensor and is configured to send detection data of the wheel torque sensor to the industrial control host, and the wheel torque sensor is electrically connected with the wireless acquisition and transmission module; the dynamic braking performance calibration device for the motor vehicle can start a braking test bed according to a normal security inspection program for braking force test on the test vehicle, record a braking force value and a braking curve at the same time, obtain the dynamic error of the braking test bed through a comparison method, and calibrate.
Description
Technical Field
The invention relates to the technical field of motor vehicle debugging, in particular to a motor vehicle dynamic braking performance calibration device.
Background
The national standard GB 7258-2017, technical Condition for safety of motor vehicle operation, requires forced inspection of the braking performance of motor vehicle, and prescribes available road test or bench test inspection methods, which are commonly adopted in practical inspection. The bench test inspection bench comprises a roller reaction type braking inspection bench and a platform type braking inspection bench, wherein the roller reaction type braking inspection bench consists of a pair of left and right rollers, a motor, a speed reducer, a transmission chain, a force sensor, a control device and the like, when a vehicle is inspected, after the vehicle enters the rollers, the motor starts the rollers to drive wheels to rotate, the vehicle brakes, and the braking force of each wheel is measured; unlike roller counter force type braking inspection bench, the flat plate type braking inspection bench consists of a left flat plate and a right flat plate, a force sensor and a measuring mechanism are arranged in the flat plates, when a vehicle is inspected, the vehicle is driven onto the flat plates at a certain speed to implement braking, and then the braking force of each wheel is measured through the force sensor and the measuring mechanism. The metering and tracing modes of the two bench test braking inspection benches at present adopt manual operation and static calibration methods, only the force transducer is directly calibrated, and the dynamic performance of a transmission mechanism, a control device, a measuring mechanism and the like of the braking inspection benches cannot be effectively detected.
Disclosure of Invention
The invention aims to solve the technical problem of providing the motor vehicle dynamic braking performance calibration device which can start a braking test bed according to a normal security inspection program for braking force test, record a braking force value and a braking curve at the same time, obtain the dynamic error of the braking test bed through a comparison method and facilitate later calibration.
In order to solve the problems, the invention adopts the following technical scheme:
a motor vehicle dynamic braking performance calibration device comprises an industrial control host, a wheel torque sensor and a wireless acquisition and transmission module;
the industrial control host is configured to record the power value and the braking curve, and the dynamic error of the braking inspection bench is obtained through a comparison method;
the wheel torque sensor is arranged between the test shaft of the test vehicle and the wheel hub;
the wireless acquisition and transmission module is arranged on the wheel torque sensor and is configured to send detection data of the wheel torque sensor to the industrial control host, and the wheel torque sensor is electrically connected with the wireless acquisition and transmission module.
Preferably, the test device further comprises an adapter for connecting the test vehicle test shaft with the wheel torque sensor, and an insertion hole matched with the test vehicle test shaft is formed in the adapter.
Preferably, the wheel torque sensor is provided with a weight mechanism, and the weight mechanism is detachably connected with the wheel torque sensor.
Preferably, the weight mechanism comprises an arc-shaped connecting block and weight bars, the arc-shaped connecting block is fixedly connected with the wheel torque sensor, the arc-shaped connecting block is clung to the arc surface of the wheel torque sensor, the arc-shaped connecting block is identical to the arc surface of the torque sensor, the arc-shaped connecting block is provided with a positioning groove matched with the weight bars, and the weight bars are inserted into the positioning groove.
Preferably, a positioning assembler for fixing the counterweight bar is arranged in the positioning groove.
Preferably, the positioning assembler comprises an upper positioning plate, a lower positioning plate and a push-type elastic self-locking mechanism, wherein an adsorbing body for adsorbing the counterweight strips is arranged on the front surface of the upper positioning plate, a guide sleeve is arranged below the positioning plate, a guide shaft matched with the guide sleeve is arranged on the front surface of the lower positioning plate, and the guide shaft is inserted into the guide sleeve.
Preferably, the back of the lower positioning plate is provided with a positioning column and a positioning sleeve, the arc-shaped connecting block is provided with a first positioning hole matched with the positioning column, the arc-shaped connecting block is provided with a second positioning hole matched with the positioning sleeve, the positioning sleeve is provided with a screw hole, and the lower positioning plate is provided with a bolt body screwed into the screw hole.
Preferably, the counterweight bar is configured to be inserted into the positioning groove and make one end surface of the counterweight bar be leveled with the side surface of the arc-shaped connecting block when the push-type elastic self-locking mechanism is self-locked.
Preferably, the side surface of the counterweight bar is provided with a pull-out groove, and the counterweight bar is further configured such that when the self-locking state of the push-type elastic self-locking mechanism is released by pushing, one end surface of the counterweight bar and the pull-out groove extend out of the positioning groove.
The invention also provides a calibration system, which comprises a brake inspection bench and the dynamic brake performance calibration device of the motor vehicle, wherein the brake inspection bench is electrically connected with the industrial control host.
The beneficial effects of the invention are as follows: the device mainly comprises an industrial control host, a wheel torque sensor and a wireless acquisition and transmission module, and the working principle is that the wheel torque sensor is arranged on a test shaft of a test car, the test car is started on a brake test bed according to a normal security inspection program to carry out braking force test, a braking force value and a braking curve are recorded, the dynamic error of the brake test bed is obtained through a comparison method, and then calibration is carried out.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram showing the connection of components of a dynamic braking performance calibration device for a motor vehicle according to the present invention.
Fig. 2 is a schematic diagram showing the assembly of a wheel torque sensor of a dynamic braking performance calibration device for a motor vehicle according to the present invention.
Fig. 3 is an exploded perspective view of a weight mechanism of a dynamic braking performance calibration device for a motor vehicle according to the present invention.
Fig. 4 is a schematic structural view of a positioning assembly of a dynamic braking performance calibration device for a motor vehicle according to the present invention.
Fig. 5 is a schematic partial structure of a weight bar of a dynamic braking performance calibration device for a motor vehicle according to the present invention.
Fig. 6 is a block diagram showing the connection of components of a calibration system according to the present invention.
10. An industrial control host;
20. a wheel torque sensor;
30. a wireless acquisition and transmission module;
40. an adapter; 41. an insertion hole;
50. a weight mechanism; 51. an arc-shaped connecting block; 52. a counterweight bar; 521. pulling out the groove; 53. a positioning groove; 54. positioning an assembler; 541. an upper positioning plate; 542. a lower positioning plate; 543. the push type elastic self-locking mechanism; 544. an adsorbent; 545. a guide sleeve; 546. a guide shaft; 547. a bolt body; 548. positioning columns; 549. positioning the sleeve;
60. and a brake inspection bench.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only some embodiments, not all embodiments.
In the embodiments, it should be understood that the directions or positional relationships indicated by the terms "middle," "upper," "lower," "top," "right," "left," "above," "back," "middle," etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting.
In addition, in the description, unless explicitly stated and limited otherwise, terms such as mounting, connecting, and coupling, should be construed broadly, and may be a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Examples
As shown in fig. 1 to 6, a dynamic braking performance calibration device for a motor vehicle includes an industrial control host 10, a wheel torque sensor 20 and a wireless acquisition and transmission module 30; the industrial control host 10 is configured to record a braking force value and a braking curve, obtain a dynamic error of the braking inspection bench through a comparison method, and then calibrate; the wheel torque sensor 20 is for mounting between the test vehicle test shaft and the wheel hub; the wireless acquisition and transmission module 30 is disposed on the wheel torque sensor 20, and the wireless acquisition and transmission module 30 is configured to send detection data of the wheel torque sensor 20 to the industrial personal computer 10, and the wheel torque sensor 20 is electrically connected with the wireless acquisition and transmission module 30. The device mainly comprises an industrial control host 10, a wheel torque sensor 20 and a wireless acquisition and transmission module 30, and the working principle is that the wheel torque sensor 20 is arranged on a test shaft of a test car, the test car is started on a brake test bed according to a normal security inspection program to carry out braking force test, a braking force value and a braking curve are recorded, the dynamic error of the brake test bed is obtained through a comparison method, and then calibration is carried out.
In this embodiment, an adaptor 40 for connecting the test axle of the test vehicle with the wheel torque sensor 20 is further included, and an insertion hole 41 matched with the test axle of the test vehicle is provided on the adaptor 40. The wheel torque sensor is mounted between the wheel hub and the axle via an adapter 40, and has the functions of connection and force transmission. When braking is performed, braking force is transmitted to an axle through wheels, torque strain is generated on a strain body of a wheel torque sensor, a strain value is converted into an electric signal and is output to the wireless acquisition and transmission module 30, and a corresponding torque value is measured. The wheel torque sensor works according to the detection range of the braking force, and is converted into the measurement range of the torque parameter. The axle center of the wheel torque sensor is coaxial with the axle center of the wheel, and the accuracy of measuring the dynamic stress condition of the wheel is ensured as long as the coaxiality is not more than phi 0.5 m.
In the process of detecting wheels, the brake inspection bench applies rolling force to the wheels through the roller, when an operator steps on a brake pedal, the measuring process of the braking force of the roller is a dynamic detection process, in the detection process, the wheels of the test vehicle rotate under the drive of the roller of the brake inspection bench, after the brake is stepped on, the braking force is transmitted to the roller through the wheels, and the braking force is measured by the wheel torque sensor. The detection process is a dynamic process, and the acquired braking force is the maximum force value of the braking process.
The wheel torque sensor is mounted on the wheel in the use process and runs on the brake test bed together with the detection vehicle, and in the running process, the wheel torque sensor is driven by the wheel axle to rotate together with the wheel axle, so that in the detection process, the wheel torque sensor connected with the wheel cannot output measurement signals in a wired connection mode, and a set of special wireless measurement transmission module is required to be designed.
The device is a special wireless acquisition and transmission module which is researched and designed, and comprises a high-precision data acquisition unit, an ultra-low power consumption wireless telemetry transceiver and a shell. The high-precision data acquisition unit and the ultra-low power consumption wireless telemetry transceiver are manufactured into a measuring device with a small volume through high integration, the measuring device is independently arranged at the wheel torque sensor shell, and the low power consumption design ensures that independent batteries can be used for supplying power. And the measurement result of the torque sensor is transmitted to the industrial control host in real time in a wireless mode, and is displayed and recorded through the industrial control host and display software. In order to ensure the dynamic performance of the acquired data and ensure the accuracy and reliability of the measurement curve, the dynamic acquisition frequency of the wireless acquisition and transmission module needs to reach more than 100 Hz.
The method comprises the steps of collecting torque parameter physical signals in the dynamic process of motor vehicle braking by adopting a wheel torque sensor and a wireless measurement transmission module; converting the digital signal into a digital signal through a signal amplifying and A/D converting circuit; and then the measurement result of the wheel torque sensor is transmitted to the wireless host in real time by utilizing a wireless mode. The automatic test and calibration functions of the dynamic braking performance of the motor vehicle are realized through the functions of data acquisition, data display, maximum value statistics and the like.
As shown in fig. 2, in some embodiments, the wheel torque sensor 20 is provided with a weight mechanism 50, and the weight mechanism 50 is connected with the wheel torque sensor 20 through a bolt, so that balance during operation can be increased by providing the weight mechanism.
As shown in fig. 3, in some embodiments, the weight mechanism 50 includes an arc-shaped connection block 51 and a weight bar 52, the arc-shaped connection block 51 is fixedly connected with the wheel torque sensor 20, the arc-shaped connection block 51 is tightly attached to the arc surface of the wheel torque sensor 20, the arc-shaped connection block 51 is the same as the arc surface of the wheel torque sensor 20, a positioning groove 53 matched with the weight bar 52 is provided on the arc-shaped connection block 51, the weight bar 52 is inserted into the positioning groove 53, the weight mechanism 50 has good weight flexibility, and the number of the weight bars 52 can be selected according to practical situations.
As shown in fig. 3, in some embodiments, a positioning assembly 54 for fixing the weight bar 52 is provided in the positioning groove 53.
As shown in fig. 4, in some embodiments, the positioning assembly 54 includes an upper positioning plate 541, a lower positioning plate 542, and a push-type elastic self-locking mechanism 543, the front surface of the upper positioning plate 541 is provided with a adsorbing body 544 for adsorbing the counterweight strip 52, a guiding sleeve 545 is disposed below the upper positioning plate 541, the front surface of the lower positioning plate 542 is provided with a guiding shaft 546 mated with the guiding sleeve 545, and the guiding shaft 546 is inserted into the guiding sleeve 545.
In some embodiments, the push-type elastic self-locking mechanism 543 employs a ratchet-based push-type elastic self-locking mechanism.
In some embodiments, the adsorbent 544 employs magnets.
As shown in fig. 4, in some embodiments, the back of the lower locating plate 542 is provided with a locating post 548 and a locating sleeve 549, the arc-shaped connecting block 51 is provided with a first locating hole (not shown) matched with the locating post 548, the arc-shaped connecting block 51 is provided with a second locating hole (not shown) matched with the locating sleeve 549, the first locating hole and the second locating hole are both communicated with the locating groove 53, the locating sleeve 549 is provided with a screw hole (not shown), the lower locating plate 542 is provided with a bolt 547 screwed into the screw hole, and the lower locating plate 542 and the arc-shaped connecting block 51 are connected through the bolt 547, the locating post 548 and the locating sleeve 549, so that the connection stability is good and the lower locating plate 542 is not easy to fall off.
In some embodiments, when the weight bar 52 is configured to be inserted into the positioning slot 53 and make the push-type elastic self-locking mechanism 543 self-lock, an end surface of the weight bar is level with a side surface of the arc-shaped connecting block 51, so that the weight bar 52 can be effectively prevented from striking other objects when the device works, and safety can be effectively improved.
As shown in fig. 5, in some embodiments, the side surface of the weight bar 52 is provided with a pull-out groove 521, and the weight bar 52 is further configured such that, when the self-locking state of the push-type elastic self-locking mechanism 543 is released by pushing, one end surface of the weight bar and the pull-out groove 521 extend out of the positioning groove 53. The counterweight strip 52 has good disassembly and assembly convenience, and good stability after being installed, and is not easy to fall off.
As shown in fig. 6, the present invention further provides a calibration system, which includes a brake inspection bench 60, and further includes the dynamic brake performance calibration device for a motor vehicle, where the brake inspection bench 60 is electrically connected with the industrial personal computer 10.
The foregoing is merely an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions not through inventive subject matter should be construed as falling within the scope of the present invention, and any element, act, or instruction used herein should not be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Furthermore, as used herein, the article "the" is intended to include one or more items recited in conjunction with the article "the" and may be used interchangeably with "one or more". Furthermore, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise. In addition, as used herein, the term "or" when used in series is intended to be inclusive and may be used interchangeably with "and/or" unless otherwise specifically indicated, e.g., if used in conjunction with "or" only one of.
Claims (8)
1. A motor vehicle dynamic braking performance calibration device, characterized in that: comprising
The industrial control host is configured to record the power value and the braking curve, obtain the dynamic error of the braking inspection bench through a comparison method, and then calibrate;
a wheel torque sensor for mounting between the test axle of the test vehicle and the wheel hub; and
the wireless acquisition and transmission module is arranged on the wheel torque sensor and is configured to send detection data of the wheel torque sensor to the industrial control host, and the wheel torque sensor is electrically connected with the wireless acquisition and transmission module;
the wheel torque sensor is provided with a weight mechanism, the weight mechanism is detachably connected with the wheel torque sensor, the weight mechanism comprises an arc-shaped connecting block and a weight bar, the arc-shaped connecting block is fixedly connected with the wheel torque sensor, the arc-shaped connecting block is clung to the arc surface of the wheel torque sensor, the arc-shaped connecting block is identical with the arc surface of the torque sensor, the arc-shaped connecting block is provided with a positioning groove matched with the weight bar, and the weight bar is inserted into the positioning groove.
2. A motor vehicle dynamic braking performance calibration apparatus according to claim 1, wherein: the test device also comprises an adapter used for connecting the test vehicle test shaft with the wheel torque sensor, and an insertion hole matched with the test vehicle test shaft is formed in the adapter.
3. A motor vehicle dynamic braking performance calibration apparatus according to claim 2, wherein: and a positioning assembler used for fixing the counterweight strip is arranged in the positioning groove.
4. A motor vehicle dynamic braking performance calibration apparatus according to claim 3, wherein: the positioning assembler comprises an upper positioning plate, a lower positioning plate and a push type elastic self-locking mechanism, wherein an adsorbing body for adsorbing the counterweight strips is arranged on the front surface of the upper positioning plate, a guide sleeve is arranged below the positioning plate, a guide shaft matched with the guide sleeve is arranged on the front surface of the lower positioning plate, and the guide shaft is inserted into the guide sleeve.
5. A motor vehicle dynamic braking performance calibration apparatus according to claim 4, wherein: the lower locating plate back is provided with reference column and positioning sleeve, be provided with on the arc connecting block with the first locating hole that the reference column cooperatees, be provided with on the arc connecting block with the second locating hole that the positioning sleeve cooperatees, be provided with the screw on the positioning sleeve, be provided with one on the lower locating plate and screw in the bolt body in the screw.
6. A motor vehicle dynamic braking performance calibration apparatus according to claim 5, wherein: the counterweight bar is configured to be inserted into the positioning groove and make one end surface of the counterweight bar be leveled with the side surface of the arc-shaped connecting block when the push type elastic self-locking mechanism is self-locked.
7. A motor vehicle dynamic braking performance calibration apparatus according to claim 6, wherein: the side face of the counterweight bar is provided with a pull-out groove, and the counterweight bar is further configured to be in a state of releasing the self-locking of the push-type elastic self-locking mechanism by pushing, and one end face of the counterweight bar and the pull-out groove extend out of the positioning groove.
8. A calibration system comprising a brake inspection station, characterized in that: a motor vehicle dynamic braking performance calibration device according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111033224.9A CN113804458B (en) | 2021-09-03 | 2021-09-03 | Dynamic braking performance calibration device and calibration system for motor vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111033224.9A CN113804458B (en) | 2021-09-03 | 2021-09-03 | Dynamic braking performance calibration device and calibration system for motor vehicle |
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| CN113804458A CN113804458A (en) | 2021-12-17 |
| CN113804458B true CN113804458B (en) | 2023-06-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943626A (en) * | 2010-08-19 | 2011-01-12 | 吉林大学 | Dynamic calibration device of counter-force roller braking bench based on hydraulic servo |
| CN107806997A (en) * | 2017-10-17 | 2018-03-16 | 北京新能源汽车股份有限公司 | Vehicle brake test bench |
| CN109341929A (en) * | 2018-11-26 | 2019-02-15 | 广州计量检测技术研究院 | Braking torque test macro |
| CN213516362U (en) * | 2020-12-21 | 2021-06-22 | 昆山礼仁义精密机械有限公司 | Utensil is examined to car power assisted steering system transmission shaft |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3343193B1 (en) * | 2016-12-12 | 2022-07-06 | Dekra Automobil GmbH | Mobile calibrating apparatus for a test stand for brakes |
| JP7058047B2 (en) * | 2017-08-04 | 2022-04-21 | 株式会社Subaru | Vehicle braking device and vehicle braking method |
| CN107817112A (en) * | 2017-09-20 | 2018-03-20 | 邢台中测仪器设备有限公司 | The detecting system of Vehicles Brake Test Bench |
| CN111103090A (en) * | 2018-10-25 | 2020-05-05 | 北京振兴计量测试研究所 | Torque calibration device of steering engine test system |
| US11413970B2 (en) * | 2019-08-21 | 2022-08-16 | Ford Global Technologies, Llc | System and method for improving traction of a vehicle that includes two electric machines |
-
2021
- 2021-09-03 CN CN202111033224.9A patent/CN113804458B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943626A (en) * | 2010-08-19 | 2011-01-12 | 吉林大学 | Dynamic calibration device of counter-force roller braking bench based on hydraulic servo |
| CN107806997A (en) * | 2017-10-17 | 2018-03-16 | 北京新能源汽车股份有限公司 | Vehicle brake test bench |
| CN109341929A (en) * | 2018-11-26 | 2019-02-15 | 广州计量检测技术研究院 | Braking torque test macro |
| CN213516362U (en) * | 2020-12-21 | 2021-06-22 | 昆山礼仁义精密机械有限公司 | Utensil is examined to car power assisted steering system transmission shaft |
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