CN207502189U - Fifth wheel instrument detection device and system - Google Patents
Fifth wheel instrument detection device and system Download PDFInfo
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- CN207502189U CN207502189U CN201721763325.0U CN201721763325U CN207502189U CN 207502189 U CN207502189 U CN 207502189U CN 201721763325 U CN201721763325 U CN 201721763325U CN 207502189 U CN207502189 U CN 207502189U
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- measurement cylinder
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Abstract
The utility model provides a kind of fifth wheel instrument detection device and system, is related to field of measuring technique.The fifth wheel instrument detection device includes measurement cylinder, transmission device and gauge head stent, the measurement cylinder periphery is arranged with transmission belt, the transmission device is sequentially connected with the measurement cylinder, optical encoder sensor is installed in the measurement cylinder, the optical encoder sensor is used to obtain the rotating speed and revolution of the measurement cylinder, the gauge head stent is set to the side of the measurement cylinder, the gauge head stent is for installing tested fifth wheel instrument photelectric receiver, so that the tested fifth wheel instrument photelectric receiver can obtain the move distance and speed of the transmission belt.Relative to the prior art, the utility model proposes fifth wheel instrument detection device and system take unique structure design, rational operation format and advanced control technology are combined, scientifically realize the braking to non-contact fifth wheel instrument, slide, mileage, speed, acceleration are detected.
Description
Technical field
The utility model is related to field of measuring technique, in particular to a kind of fifth wheel instrument detection device and system.
Background technology
With the rapid development of China's communication, automobile plays increasingly important role, therefore, vapour in all trades and professions
The performance of vehicle and safety are just particularly important.Fifth wheel instrument is divided into contact and contactless, be to automobile dynamic performance into
The important means of row actual road test, the accuracy of its own is with regard to extremely important.In order to ensure that fifth wheel instrument has reliable and accurate property
Energy index, it is very necessary that science, effective technological means is taken, which to be detected calibration to fifth wheel instrument,.
It is detected calibration in itself to non-contact fifth wheel instrument at present, typically by Road Detection, there is operation not
Just, the shortcomings such as accuracy of detection is low, and transmission belt bounce is big, skids, and measurement accuracy is low.
Utility model content
The purpose of this utility model is to provide a kind of fifth wheel instrument detection device and systems, can be effectively improved above-mentioned ask
Topic.
What the embodiment of the utility model was realized in：
In a first aspect, the utility model embodiment provides a kind of fifth wheel instrument detection device, including measurement cylinder, transmission
Device and gauge head stent, the measurement cylinder periphery are arranged with transmission belt, and the transmission device connects with measurement cylinder transmission
It connecing, the transmission device is for driving the measurement cylinder to rotate, so that the transmission belt follows the measurement cylinder to move, institute
It states and optical encoder sensor is installed in measurement cylinder, the optical encoder sensor is used to obtain the rotating speed of the measurement cylinder
And revolution, the gauge head stent are set to the side of the measurement cylinder, the gauge head stent is used to install tested fifth wheel instrument light
Electric receiver, so that the tested fifth wheel instrument photelectric receiver can obtain the move distance and speed of the transmission belt.
In the utility model preferred embodiment, the periphery of the measurement cylinder is provided with tooth form groove, the transmission
The inner circumferential of band is provided with toothed projections, the toothed projections cooperation of the tooth form groove and the transmission belt of the measurement cylinder.
In the utility model preferred embodiment, the fifth wheel instrument detection device further includes device controller unit, described
Device controller unit is connected with the optical encoder sensor, and described device controller unit is used for the optical encoder sensor
The measurement data of output is handled.
In the utility model preferred embodiment, described device controller unit includes microcontroller, high precision clock, electricity
Source module, the SRAM with power down protection, display module, input equipment and output equipment.
In the utility model preferred embodiment, the fifth wheel instrument detection device further includes rolling stand, the measurement
Roller is set up on the rolling stand.
In the utility model preferred embodiment, the gauge head stent is provided with flexible and angle adjusting mechanism, described
Flexible and angle adjusting mechanism is used to adjust relative position and the angle of the tested fifth wheel instrument photelectric receiver and the transmission belt
Degree.
In the utility model preferred embodiment, the transmission device includes motor and electric control box, the electricity
Gas control cabinet is connected with the motor, and the electric control box is used to that measurement cylinder described in the motor drive to be controlled to turn
It is dynamic.
In the utility model preferred embodiment, the electric control box is JD6 electromagnetic speed governing motor controllers.
In the utility model preferred embodiment, the optical encoder sensor is GBZ03B types.
Second aspect, the utility model embodiment additionally provide a kind of fifth wheel instrument detecting system, including as described above
Fifth wheel instrument detection device and tested fifth wheel instrument photelectric receiver, the tested fifth wheel instrument photelectric receiver are mounted on described five wheels
On the gauge head stent of instrument detection device, the tested fifth wheel instrument photelectric receiver is directed at the transmission of the fifth wheel instrument detection device
Band, the tested fifth wheel instrument photelectric receiver are used to obtain the move distance and speed of the transmission belt.
The utility model embodiment provide fifth wheel instrument detection device and system, be provided with measurement cylinder, transmission device and
Gauge head stent, and the measurement cylinder periphery is arranged with transmission belt, and the transmission device and the measurement cylinder are sequentially connected,
It can be rotated by measurement cylinder described in the actuator drives, so that the transmission belt follows the measurement cylinder to move；
Optical encoder sensor is also equipped in the measurement cylinder, can be used for obtaining the measurement by the optical encoder sensor
The rotating speed and revolution of roller, to be converted to the rotation arc length of the measurement cylinder；The gauge head stent is set to described measure and rolls
The side of cylinder, the gauge head stent can be used for the tested fifth wheel instrument photelectric receiver of installation, so that the tested fifth wheel instrument photoelectricity connects
The move distance and speed of the transmission belt can be obtained by receiving device.Compared with prior art, the utility model embodiment provides
Fifth wheel instrument detection device and system are controlled using the exclusive measurement cylinder with high impulse optical encoder sensor in transmission device
Lower drive conveyor belt motion is so as to simulate true road surface, by taking unique structure design, rational operation format and advanced
Control technology be combined, with advanced technology means, effectively improve device measurement accuracy, scientifically realize to contactless
The braking of fifth wheel instrument, slide, mileage, speed, acceleration are detected, ensure that automobile dynamic performance actual road test
Detection accuracy.
Description of the drawings
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structure diagram of fifth wheel instrument detection device that the utility model first embodiment provides；
Fig. 2 is the structure diagram of the measurement cylinder that the utility model first embodiment provides and transmission band connection；
Fig. 3 is the knot for the fifth wheel instrument detection device for including device controller unit that the utility model first embodiment provides
Structure schematic diagram；
Fig. 4 is the structure diagram of device controller unit that the utility model first embodiment provides；
Fig. 5 is that the structure for the fifth wheel instrument detection device for including rolling stand that the utility model first embodiment provides is shown
It is intended to；
Fig. 6 is the structure diagram of transmission device that the utility model first embodiment provides；
Fig. 7 is the structure diagram of fifth wheel instrument detecting system that the utility model second embodiment provides.
Icon：100- measurement cylinders；120- transmission belts；140- optical encoder sensors；200- transmission devices；220- electricity
Motivation；240- electric control boxes；300- gauge head stents；400- device controller units；500- rolling stands；600- is tested fifth wheel instrument
Photelectric receiver；1000- fifth wheel instrument detection devices；1000- fifth wheel instrument detecting systems.
Specific embodiment
Purpose, technical scheme and advantage to make the utility model embodiment are clearer, new below in conjunction with this practicality
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be configured to arrange and design with a variety of different.
Therefore, requirement is not intended to limit to the detailed description of the embodiment of the utility model provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " in ", " on ", " under ", "left", "right", " interior ",
The orientation or position relationship of instructions such as " outer " are based on orientation shown in the drawings or position relationship or the utility model product
The orientation or position relationship usually put during use are for only for ease of description the utility model and simplify description, without referring to
Show or imply that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore cannot manage
It solves as the limitation to the utility model.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
It solves to indicate or implying relative importance.
In addition, the terms such as term " level ", " vertical ", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to represent the structure if " level " only refers to that its direction is more horizontal with respect to for " vertical "
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected,
Or it is integrally connected；Can be mechanical connection or electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve concrete meaning of the above-mentioned term in the utility model.
In addition, the terms such as " input ", " output ", " feedback ", " formation " are understood as describing a kind of optics, electricity variation
Or optics, electricity processing.As " formation " only refers to optical signal or electric signal by being had occurred after the element, instrument or device
Variation optically or electrically so that the optical signal or the electric signal are processed, and then are obtained and implemented technical solution
Or solve the required signal of technical problem.
In specific embodiment of the utility model attached drawing, in order to it is more preferable, it is clearer description fifth wheel instrument detection device and
The operation principle of each element in system, show described device in each section connection relation, only significantly distinguished each element it
Between relative position relation, can not form in element or structure optical path direction, the order of connection and Each part size,
The restriction of size, shape.
First embodiment
Fig. 1 is please referred to, present embodiments provides a kind of fifth wheel instrument detection device 1000, including measurement cylinder 100, transmission
Device 200 and gauge head stent 300,100 periphery of measurement cylinder are arranged with transmission belt 120.
In the present embodiment, the transmission device 200 is sequentially connected with the measurement cylinder 100, and the transmission device 200 is used
In the measurement cylinder 100 is driven to rotate, so that the transmission belt 120 follows the measurement cylinder 100 to move.The measurement
Optical encoder sensor 140 is installed, the optical encoder sensor 140 is used to obtain the measurement cylinder 100 on roller 100
Rotating speed and revolution, to be converted to the rotation arc length of the measurement cylinder 100.The gauge head stent 300 is set to the measurement
The side of roller 100, the gauge head stent 300 is for installing tested fifth wheel instrument photelectric receiver 600, so that tested five wheel
Instrument photelectric receiver 600 can obtain the move distance and speed of the transmission belt 120.
In the present embodiment, measurement cylinder 100 include major and minor two rollers, 100 spindle nose of measurement cylinder by shaft coupling with
The axis of optical encoder sensor 140 is connected.Drive the movement of transmission belt 120 that can simulate true road surface by measurement cylinder 100
Measuring surface, and the height of the measuring surface and tested fifth wheel instrument photelectric receiver 600 is highly convenient for staff and is detected behaviour
Make.
Please refer to Fig. 2, in the present embodiment, the periphery of the measurement cylinder 100 is provided with tooth form groove, the transmission belt
120 inner circumferential is provided with toothed projections, and the tooth form groove of the measurement cylinder 100 and the toothed projections of the transmission belt 120 are matched
It closes.
In the present embodiment, by using the major diameter gear hobbing roller technology of exclusive increase drum length, effectively eliminate
It the phenomenon that skidding between measurement cylinder 100 and transmission belt 120 and transmission belt 120 can be effectively reduced beats the error brought,
The bounce of transmission belt 120 is reduced in tolerance using the control of roller processing technology and mounting process so that measure
It is more accurate, reliable, it is intelligent to realize measurement.
Please refer to Fig. 3, in the present embodiment, the fifth wheel instrument detection device 1000 further includes device controller unit 400, described
Device controller unit 400 and the optical encoder sensor 140 connect.Described device controller unit 400 is used for the photoelectricity
The measurement data that code sensor 140 exports is handled.
Fig. 4 is please referred to, as a kind of preferred embodiment, in the present embodiment, described device controller unit 400 can wrap
Include microcontroller, high precision clock, power module, the SRAM with power down protection, display module, input equipment and output equipment.
Wherein, the microcontroller is connect with the optical encoder sensor 140, defeated for obtaining the optical encoder sensor 140
With the parameter with reference to the measurement cylinder 100 and optical encoder sensor 140, the pulse signal is changed for the pulse signal gone out
The rotating speed and revolution rotated for the measurement cylinder 100 is calculated, and turning for the measurement cylinder 100 is converted to by the rotating speed and revolution
Dynamic arc length.
As shown in figure 4, the high precision clock, power module, the SRAM with power down protection, display module, input equipment
It is connect respectively with the microcontroller with output equipment.Wherein, the display module can be that display instrument, display screen etc. are aobvious
Show equipment, the data such as rotation arc length, rotating speed available for showing collected measurement cylinder 100；The input equipment can be
The control instructions input equipment such as keyboard, mouse, microphone；The output equipment can be the equipment such as printer, for that will acquire
The data result printout arrived.Particularly, the microcontroller can also pass through encoder and tested fifth wheel instrument opto-electronic receiver
Device 600 connects, with obtain the move distance of the collected transmission belt 120 of the tested fifth wheel instrument photelectric receiver 600 and
Speed, and shown or printed out.
In the present embodiment, secondary instrument is collectively constituted by the optical encoder sensor 140 and device controller unit 400.
Preferably, optical encoder sensor 140 uses GBZ03B models, and maximum allowable speed 3000r/min exports umber of pulse
1000pr, the circular error 0.05T pulse periods of adjacent signals allow thrust load axial direction≤10N, radial direction≤10N, staring torque
≤2×10-3Nm, vibration resistance≤50m/s2, impact resistance≤980m/s2, WZ05P outputs.Preferably, described device controller unit
400 are controlled using microprocessor 89c52 as instrument core, and instrument, which has, shows and print out mode, since 89c52 has
There are ROM storages, realized by its programming to systematic features, realize the control for measuring function, the processing of data and interface
Setting reach measurement by instrument panel keyboard operation finishing device.
Please refer to Fig. 5, in the present embodiment, the fifth wheel instrument detection device 1000 further includes rolling stand 500, the measurement
Roller 100 is set up on the rolling stand 500.
In the present embodiment, measurement cylinder 100 is supported by rolling stand 500, can arbitrarily adjust the measurement
The height of roller 100, staff to be facilitated to be operated.
In the present embodiment, the gauge head stent 300 is provided with flexible and angle adjusting mechanism, the flexible and angular adjustment
Mechanism is used to adjust the relative position and angle of the tested fifth wheel instrument photelectric receiver 600 and the transmission belt 120.By upper
The rolling stand 500 stated and the flexible and angle adjusting mechanism on gauge head stent 300, can be by the height of device each on workbench
With angular adjustment to the range rationally and in measurement distance, it is easier to which staff is operated.
Please refer to Fig. 6, in the present embodiment, the transmission device 200 includes motor 220 and electric control box 240, described
Electric control box 240 and the motor 220 connect, and the electric control box 240 is used to that the motor 220 to be controlled to drive institute
Measurement cylinder 100 is stated to rotate.
In the present embodiment, it is preferred that the electric control box 240 uses JD6 electromagnetic speed governing motor controllers, is controlled electricity
220 0.55~90kw of power of motivation, maximum output DC voltage 90V, electric current 8A, lasting accuracy ＜ ± 2 turn, speed regulation ＜
0.5% (during 10%~100% load variation), has dragging motor stalling, over-speed protection function.
Fifth wheel instrument detection device 1000 provided in this embodiment, device use exclusive band high impulse optical encoder sensor
140 major diameter gear hobbing roller moves flat-toothed belt 120 in 200 stepless speed regulation of transmission device control lower band and moves to simulate
True road surface using tachometric survey technology and combines advanced electronics microprocessing and special-purpose software, realizes appointing for speed
Meaning adjusts and accurate setting, the braking distance to non-contact fifth wheel instrument has been effectively ensured, speed ability is detected calibration, from
And ensure the detection accuracy to automobile dynamic performance actual road test, there is higher measurement accuracy and that emulates the advanced is applicable in
Property and preferable industry market potentiality.
Second embodiment
Fig. 7 is please referred to, a kind of fifth wheel instrument detecting system 2000 is present embodiments provided, is carried including above-mentioned first embodiment
The fifth wheel instrument detection device 1000 of confession and tested fifth wheel instrument photelectric receiver 600.
In the present embodiment, the tested fifth wheel instrument photelectric receiver 600 is mounted on the fifth wheel instrument detection device 1000
On gauge head stent 300, the tested fifth wheel instrument photelectric receiver 600 is directed at the transmission belt of the fifth wheel instrument detection device 1000
120, the tested fifth wheel instrument photelectric receiver 600 is used to obtain the move distance and speed of the transmission belt 120.
Preferably, tested 600 measurement direction of fifth wheel instrument photelectric receiver and the measuring surface of the transmission belt 120 are hung down
Directly.
One kind introduced below is specifically apart from detection example.
By installing optical encoder sensor, direct solenoid variable-speed motor in the measurement cylinder of fifth wheel instrument detection device
Under the control of electric control box and driving circuit, stepless speed regulation is realized to motor, it is made to drive measurement cylinder rotation, is reached
The purpose of flat-toothed belt movement on the major and minor roller of measurement cylinder is connected, measures the survey measured by optical encoder sensor
The revolution of amount roller rotation corresponds to the transmission measured with contactless tested fifth wheel instrument photelectric receiver by photodetector
The difference of the move distance of band.
Optical encoder sensor, which rotates a circle, generates 1000 pulses, and machinery drum belt outer diameter is Φ 294.20mm, week
Long S=924.25656mm, a pulse represent the arc length corresponding to machinery drum.
Therefore, pulse equivalency q=perimeters S/ optical encoder sensors rotate a circle umber of pulse N
=924.25656/1000
=0.92425656mm
Thus the calculation formula for obtaining braking distance is：
L=N × q
In formula：The umber of pulse that N-counter records roller rotary photoelectric code sensor generates
Q-pulse equivalency (mm)
A kind of specific velocity measuring example introduced below.
Fifth wheel instrument detection device is in the detection for carrying out velocity amplitude, by the microcomputer (microcontroller of device controller unit
Device) two counters be divided to two channels, to optical encoder sensor generate pulse and quartz crystal oscillator it is divided after pulse
It counts respectively.The generation pulse of optical encoder sensor represents distance L, it is divided after quartz crystal oscillator pulse represent time T, by
This calculation formula for obtaining speed is：
V=L/T
If：T1 counter records optical encoder sensor umber of pulses N.
Umber of pulse k after T2 counter records quartz crystal oscillators are divided.
Because：Q is optical encoder sensor pulse equivalency；P is crystal oscillator commutator pulse equivalent.
So：V=L/T=(N × q)/(k × p)
In formula：Q, k, p are constant.
In conclusion fifth wheel instrument detection device and system that the utility model embodiment provides, are provided with measurement cylinder, pass
Dynamic device and gauge head stent, and the measurement cylinder periphery is arranged with transmission belt, by the transmission device and the measurement cylinder
It is sequentially connected, can be rotated by measurement cylinder described in the actuator drives, so that the transmission belt follows described measure to roll
Cylinder movement；Optical encoder sensor is also equipped in the measurement cylinder, can be used for obtaining by the optical encoder sensor
The rotating speed and revolution of the measurement cylinder are taken, to be converted to the rotation arc length of the measurement cylinder；The gauge head stent is set to
The side of the measurement cylinder, the gauge head stent can be used for the tested fifth wheel instrument photelectric receiver of installation, so that described tested five
Wheel instrument photelectric receiver can obtain the move distance and speed of the transmission belt.Compared with prior art, the utility model is real
The fifth wheel instrument detection device and system for applying example offer are being passed using the exclusive measurement cylinder with high impulse optical encoder sensor
Dynamic device control is lower to drive conveyor belt motion so as to simulate true road surface, rational to operate by taking unique structure design
Form and advanced control technology are combined, and with advanced technology means, are effectively improved device measurement accuracy, are scientifically realized
Braking to non-contact fifth wheel instrument, slide, mileage, speed, acceleration are detected, ensure that automobile dynamic performance
The detection accuracy of actual road test.The above descriptions are merely preferred embodiments of the present invention, is not limited to this reality
With novel, for those skilled in the art, the present invention may have various modifications and changes.It is all in the utility model
Spirit and principle within, any modification, equivalent replacement, improvement and so on should be included in the protection model of the utility model
Within enclosing.
Claims (10)
1. a kind of fifth wheel instrument detection device, which is characterized in that including measurement cylinder, transmission device and gauge head stent, the measurement
Periphery is arranged with transmission belt,
The transmission device is sequentially connected with the measurement cylinder, and the transmission device is used to that the measurement cylinder to be driven to rotate,
So that the transmission belt follows the measurement cylinder to move,
Optical encoder sensor is installed, the optical encoder sensor is used to obtain the measurement cylinder in the measurement cylinder
Rotating speed and revolution,
The gauge head stent is set to the side of the measurement cylinder, and the gauge head stent connects for installing tested fifth wheel instrument photoelectricity
Device is received, so that the tested fifth wheel instrument photelectric receiver can obtain the move distance and speed of the transmission belt.
2. fifth wheel instrument detection device according to claim 1, which is characterized in that the periphery setting of the measurement cylinder is with teeth
Connected in star, the inner circumferential of the transmission belt are provided with toothed projections, the tooth form groove of the measurement cylinder and the tooth of the transmission belt
Shape male cooperation.
3. fifth wheel instrument detection device according to claim 1, which is characterized in that the fifth wheel instrument detection device further includes dress
Controller unit is put, described device controller unit is connected with the optical encoder sensor, and described device controller unit is used for institute
The measurement data for stating optical encoder sensor output is handled.
4. fifth wheel instrument detection device according to claim 3, which is characterized in that described device controller unit includes microcontroller
Device, high precision clock, power module, the SRAM with power down protection, display module, input equipment and output equipment.
5. fifth wheel instrument detection device according to claim 1, which is characterized in that the fifth wheel instrument detection device further includes rolling
Tube stent, the measurement cylinder are set up on the rolling stand.
6. fifth wheel instrument detection device according to claim 1, which is characterized in that the gauge head stent is provided with flexible and angle
Regulating mechanism is spent, the flexible and angle adjusting mechanism is used to adjust the tested fifth wheel instrument photelectric receiver and the transmission belt
Relative position and angle.
7. fifth wheel instrument detection device according to claim 1, which is characterized in that the transmission device includes motor and electricity
Gas control cabinet, the electric control box are connected with the motor, and the electric control box is used to control the motor drive
The measurement cylinder rotation.
8. fifth wheel instrument detection device according to claim 7, which is characterized in that the electric control box is JD6 electromagnetism tune
Electric motor with speed controller.
9. fifth wheel instrument detection device according to claim 1, which is characterized in that the optical encoder sensor is GBZ03B
Type.
10. a kind of fifth wheel instrument detecting system, which is characterized in that detected including fifth wheel instrument as described in any one of claim 1 to 9
Device and tested fifth wheel instrument photelectric receiver, the tested fifth wheel instrument photelectric receiver are mounted on the fifth wheel instrument detection device
Gauge head stent on, the tested fifth wheel instrument photelectric receiver is directed at the transmission belt of the fifth wheel instrument detection device, described tested
Fifth wheel instrument photelectric receiver is used to obtain the move distance and speed of the transmission belt.
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|---|---|---|---|
| CN201721763325.0U CN207502189U (en) | 2017-12-14 | 2017-12-14 | Fifth wheel instrument detection device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721763325.0U CN207502189U (en) | 2017-12-14 | 2017-12-14 | Fifth wheel instrument detection device and system |
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ID=62509114
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843443A (en) * | 2017-12-14 | 2018-03-27 | 中国测试技术研究院 | Fifth wheel instrument detection means and system |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843443A (en) * | 2017-12-14 | 2018-03-27 | 中国测试技术研究院 | Fifth wheel instrument detection means and system |
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