CN112363125A - Ground slow-speed target simulation device - Google Patents
Ground slow-speed target simulation device Download PDFInfo
- Publication number
- CN112363125A CN112363125A CN202010815094.3A CN202010815094A CN112363125A CN 112363125 A CN112363125 A CN 112363125A CN 202010815094 A CN202010815094 A CN 202010815094A CN 112363125 A CN112363125 A CN 112363125A
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- wheel
- target simulation
- speed measuring
- speed
- ground
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- 238000004088 simulation Methods 0.000 title claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 239000000725 suspension Substances 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 3
- 230000009191 jumping Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention provides a ground slow-speed target simulation device which comprises a vehicle body, a driving motor, a transmission system, a whole vehicle running system, a fifth wheel speed measuring mechanism, a braking system, a laser range finder, a wheel speed sensor and an I-shaped guide rail, wherein the driving motor is connected with the driving system; the whole vehicle running system consists of two groups of suspension mechanisms, a guide mechanism and a fifth wheel speed measuring mechanism; the vehicle body is arranged at the upper part of the whole vehicle running system; the driving motor and the transmission system are used for driving the whole vehicle running system and driving the ground slow-speed target simulation device to run; the fifth wheel speed measuring mechanism is used for detecting the moving speed of the ground low-speed target simulation device along the I-shaped guide rail; the wheel speed sensor is arranged at the wheel of the whole vehicle running system; the laser range finders are arranged at the front end and the rear end of the vehicle body; the I-shaped guide rail is arranged below the whole vehicle running system along the advancing direction parallel to the ground slow-speed target simulation device.
Description
Technical Field
The invention belongs to the technical field of radar test equipment, and particularly relates to a simulation device for ground armor or vehicle slow-speed moving targets.
Background
The radar dynamic multi-target simulation system aims at solving the technical problem of how to detect the multi-target tracking performance of a phased array measurement radar. However, there are few solutions in the prior art for small and slow RCS targets flying close to the ground and for ground armor-like or vehicle-like slow moving targets of different RCS characteristics. Therefore, in order to meet the above-mentioned type of objectives, it is necessary to design a target simulation system to adapt to the simulation experiment of the performance index.
Disclosure of Invention
Aiming at a small and slow RCS target flying close to the ground and a ground armored or vehicle slow-speed moving target with different RCS characteristics, the ground slow-speed target simulation device provided by the invention finishes the simulation of loading radar equipment on a vehicle and supplying power, and enables the test equipment to meet the required test state in a limited slide rail space through the accurate control of the whole vehicle.
The ground slow target simulation device specifically comprises: the system comprises a vehicle body, a driving motor and transmission system, a whole vehicle running system, a fifth wheel speed measuring mechanism, a braking system, a laser range finder, a wheel speed sensor and an I-shaped guide rail;
the whole vehicle running system consists of two groups of suspension mechanisms, a guide mechanism and a fifth wheel speed measuring mechanism;
the vehicle body is arranged at the upper part of the whole vehicle running system;
the driving motor and the transmission system are used for driving the whole vehicle running system and driving the ground slow-speed target simulation device to run;
the fifth wheel speed measuring mechanism is used for detecting the moving speed of the ground low-speed target simulation device along the I-shaped guide rail;
the wheel speed sensor is arranged at the wheel position of the whole vehicle running system and used for measuring the wheel speed of the wheel;
the laser range finders are mounted at the front end and the rear end of the vehicle body and are used for measuring the position and the running speed of the ground slow-speed target simulation device;
the I-shaped guide rail is arranged below the whole vehicle running system along the advancing direction parallel to the ground slow-speed target simulation device.
Furthermore, the suspension mechanism consists of a suspension mounting plate, a suspension, an axle, a bearing seat and a wheel; the upper part of the suspension mounting plate is used for mounting and supporting the vehicle body, and two ends of the suspension mounting plate are respectively provided with a suspension extending downwards; and bearing seats are respectively arranged at the lower ends of the suspensions and are used for mounting wheels and axles.
Further, the guide mechanism is arranged in the middle of the suspension mounting plate through a bracket; the lower end of the bracket is provided with two guide wheels, and the upper end surface of the I-shaped guide rail is clamped between the two guide wheels; the two guide wheels are respectively provided with an anti-tilting frame along the same side of the extension direction of the I-shaped guide rail, and each anti-tilting frame is provided with a structure extending towards the concave part of the I-shaped guide rail and used for being matched with the upper end face of the I-shaped guide rail to limit the displacement of the suspension mechanism in the vertical direction. Through the guide mechanism, the linearity of the whole vehicle running can be effectively guaranteed, and the whole vehicle is prevented from rolling over when the brake is inclined forwards too much.
Furthermore, the guide wheels are fixedly installed through the strip-shaped adjusting holes in the installing support and used for adjusting the gap between the mechanism and the guide rail, so that the function of the mechanism is fully reasonable.
Furthermore, the fifth wheel speed measuring mechanism consists of a mounting bracket, a tension spring, a lever arm, a speed measuring wheel, a speed measuring gear and a speed measuring sensor; the mounting bracket is used for mounting and fixing the fifth wheel speed measuring mechanism on a suspension mechanism; the lower end of the mounting bracket is pivotally connected with the middle part of the lever arm; one end of the lever arm is provided with a speed measuring wheel and a speed measuring sensor, and the speed measuring sensor detects the speed of the speed measuring wheel through a speed measuring gear on the speed measuring wheel; the other end of the lever arm is connected with the mounting bracket through a tension spring, and is tensioned through the tension spring to provide downward pressure for the speed measuring wheel. The tension spring mounting lifting lug can be adjusted within a certain range through the long hole, so that the tension spring force can be adjusted within a certain range, and the sufficient downward pressure of the tachometer wheel is ensured. Through the structure, the fifth wheel speed measuring mechanism can be in full contact with the guide rail to measure the moving speed of the whole vehicle in real time.
Furthermore, the ground slow-speed target simulation device also comprises a cleaning mechanism which consists of a manual clamp and a cleaning brush; the manual clamp is used for fixing the cleaning mechanism at a proper position of the ground slow-speed target simulation device, and can be taken down to clean the running track when necessary so as to ensure the cleanness and the stability of the running track.
Further, the ground slow target simulation device further comprises: the vehicle-mounted control cabinet consists of a vehicle controller, a power distribution control combination and a servo control combination, and the standby power system consists of a standby battery pack and a standby driving motor; the vehicle-mounted control cabinet is arranged at the lower end of the vehicle body; a mechanical installation interface, a communication interface, a power supply interface and a grounding pile of the load equipment are reserved above the vehicle body; the rear part of the vehicle body is also provided with a mechanical interface for installing a take-up and pay-off device.
Furthermore, in order to meet the braking requirement, the braking system adopts front and rear axle double braking, and the braking type is disc type braking.
Advantageous effects
The ground slow-speed target simulation device provided by the invention is used for simulating the radar equipment borne by the vehicle and supplying power for the small and slow-speed RCS (radar cross section) targets flying close to the ground and the ground armored or vehicle slow-speed moving targets with different RCS characteristics, and the test equipment can meet the required test state in the limited slide rail space through the accurate control of the whole vehicle. The device can be based on a mature straddle type traffic vehicle, and has the advantages of high reliability, large bearing capacity and easy maintenance and cleaning.
Drawings
FIG. 1 is a view showing an overall configuration of an apparatus provided by the present invention;
FIG. 2 shows a block diagram of a vehicle travel system;
FIG. 3 shows a structural view of a suspension mechanism;
FIG. 4 shows an oblique view of the guide mechanism;
FIG. 5 shows a side view of the guide mechanism;
FIG. 6 is a schematic view showing the construction of the sweeping mechanism;
fig. 7 shows a schematic structural diagram of a fifth wheel tachometer mechanism;
FIG. 8 illustrates a functional diagram of the braking system;
FIG. 9 shows a brake air path schematic of the braking system;
fig. 10 shows an oil circuit diagram of the brake system.
Reference numerals: 1. the device comprises a suspension mechanism, 2 parts of a guide mechanism, 3 parts of a fifth wheel speed measuring mechanism, 4 parts of a cleaning mechanism, 5 parts of a suspension, 6 parts of a suspension mounting plate, 7 parts of an axle, 8 parts of a wheel, 9 parts of a bearing seat, 10 parts of a strip-shaped adjusting hole, 11 parts of a guide wheel, 12 parts of an anti-tilting frame, 13 parts of a manual clamp, 14 parts of a cleaning brush, 15 parts of a mounting bracket, 16 parts of a speed measuring wheel, 17 parts of a tension spring, 18 parts of a lever arm, 19 parts of a speed measuring sensor, 20 parts of a speed measuring gear and 21 parts of an I-shaped.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
The ground slow target simulation device provided by the invention, as shown in fig. 1-2, specifically comprises: the system comprises a vehicle body, a driving motor and transmission system, a whole vehicle running system, a fifth wheel speed measuring mechanism 3, a braking system, a laser range finder, a wheel speed sensor and an I-shaped guide rail 21;
the whole vehicle running system consists of two groups of suspension mechanisms 1, a guide mechanism 2 and a fifth wheel speed measuring mechanism 3;
the vehicle body is arranged at the upper part of the whole vehicle running system;
the driving motor and the transmission system are used for driving the whole vehicle running system and driving the ground slow-speed target simulation device to run;
the fifth wheel speed measuring mechanism 3 is used for detecting the moving speed of the ground slow-speed target simulation device along the I-shaped guide rail 21;
the wheel speed sensor is arranged at the wheel position of the whole vehicle running system and used for measuring the wheel speed of the wheel;
the laser range finders are mounted at the front end and the rear end of the vehicle body and are used for measuring the position and the running speed of the ground slow-speed target simulation device;
the I-shaped guide rail 21 is arranged below the whole vehicle running system along the running direction parallel to the ground slow-speed target simulation device.
In a preferred embodiment of the invention, the rim is 12 inches, and the tire is 135/70R12, which meets the dynamic requirements of the whole vehicle.
As shown in fig. 3, the suspension mechanism 1 is composed of a suspension mounting plate 6, a suspension 5, an axle 7, a bearing housing 9, and a wheel 8; the upper part of the suspension mounting plate 6 is used for mounting and supporting the vehicle body, and two ends of the suspension mounting plate are respectively provided with a suspension 5 extending downwards; and bearing seats 9 are respectively arranged at the lower ends of the suspensions 5 and used for mounting wheels 8 and axles 7. In a preferred embodiment of the invention, the suspension mechanism is connected with the frame through bolt connection so as to support the whole vehicle mechanism, the suspension made of high-strength 7075 aluminum is adopted to be provided with the upper flat plate so as to ensure the transverse stability of the whole vehicle, and the suspension and the bearing seat are also made of 7075 aluminum and are reasonably lightened so as to ensure the strength and stability of support and running. The axle adopts a steel pipe with the outer diameter of 58mm and the inner diameter of 43mm, so that the rigidity and strength requirements of use are met; the rim is 12 inches, and the tire is 135/70R12, so that the power requirement of the whole vehicle is met.
As shown in fig. 4 to 5, the guide mechanism is disposed in the middle of the suspension mounting plate 6 through a bracket; the lower end of the bracket is provided with two guide wheels 11, and the upper end surface of the I-shaped guide rail 21 is clamped between the two guide wheels; the two guide wheels 11 are respectively provided with an anti-tilting frame 12 at the same side along the extending direction of the I-shaped guide rail, and the anti-tilting frames 12 have structures extending towards the concave parts of the I-shaped guide rail 21 and are used for being matched with the upper end surface of the I-shaped guide rail 21 to limit the displacement of the suspension mechanism 1 in the vertical direction. Through the guide mechanism, the linearity of the whole vehicle running can be effectively guaranteed, and the whole vehicle is prevented from rolling over when the brake is inclined forwards too much.
The guide wheels 12 are fixedly installed through the strip-shaped adjusting holes 10 on the support and are used for adjusting the gap between the guide mechanism and the I-shaped guide rail 21, so that the function reasonableness of the mechanism is fully guaranteed.
In a preferred embodiment of the invention, the guide mechanism ensures that the whole vehicle does not deviate from a preset direction by the contact limit between the polyurethane wheel and the GB38KG heavy rail, and the standard GB38KG heavy rail is adopted to ensure the straightness of the vehicle; and the anti-roll mechanism is used for preventing the vehicle from rolling excessively or rolling over due to excessive roll in the braking process of the whole vehicle. The guide mechanism support is made of high-strength 7075 aluminum materials, reasonable light weight is achieved, and rigidity strength of the guide mechanism and light weight of the whole vehicle are guaranteed.
The gap between the polyurethane wheel and the guide rail is designed to be 1mm so as to ensure that the left and right jumping amount of the sliding contact line can normally work within a reasonable range, the gap between the anti-tilting friction plate and the guide rail is 10mm, the up and down jumping amount of the whole vehicle under the braking working condition in the adams dynamics simulation is 7-8 mm, and the normal braking can be ensured by presetting 10mm, and the longitudinal inclination of the whole vehicle with excessive jumping can also be prevented.
As shown in fig. 7, the fifth wheel speed measuring mechanism 3 is composed of a mounting bracket 15, a tension spring 17, a lever arm 18, a speed measuring wheel 16, a speed measuring gear 20 and a speed measuring sensor 19; the mounting bracket 15 is used for mounting and fixing the fifth wheel speed measuring mechanism 3 on a suspension mechanism 1; the lower end of the mounting bracket 15 is pivotally connected to the middle of the lever arm 18; one end of the lever arm 18 is provided with a tachometer wheel 20 and a tachometer sensor 19, and the tachometer sensor 19 detects the wheel speed of the tachometer wheel 16 through a tachometer gear 20 on the tachometer wheel 16; the other end of the lever arm 18 is connected to the mounting bracket by a tension spring 17, and is tensioned by the tension spring 17 to provide a downward pressure to the tachometer wheel 16. The tension spring mounting lifting lug can be adjusted within a certain range through the long hole, so that the tension spring force can be adjusted within a certain range, and the sufficient downward pressure of the tachometer wheel is ensured. Through the structure, the fifth wheel speed measuring mechanism can be in full contact with the guide rail to measure the moving speed of the whole vehicle in real time.
As shown in fig. 6, the ground slow-speed target simulation device further comprises a cleaning mechanism, which is composed of a manual clamp 13 and a cleaning brush 14; the manual clamp 13 is used for fixing the cleaning mechanism at a proper position of the ground slow-speed target simulation device, and can be taken down to clean the running track when necessary so as to ensure the cleanness and stability of the running track.
In a preferred embodiment of the present invention, the ground slow target simulation apparatus further includes: the vehicle-mounted control cabinet consists of a vehicle controller, a power distribution control combination and a servo control combination, and the standby power system consists of a standby battery pack and a standby driving motor; the vehicle-mounted control cabinet is arranged at the lower end of the vehicle body; a mechanical installation interface, a communication interface, a power supply interface and a grounding pile of the load equipment are reserved above the vehicle body; (ii) a The rear part of the vehicle body is also provided with a mechanical interface for installing a take-up and pay-off device.
In a preferred embodiment of the invention, in order to meet the braking requirement, the braking system adopts front and rear axle double braking, and the braking type is disc type braking. The general structure of the brake system, the principle of the brake air path and the brake oil path are respectively shown in fig. 8-10.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A ground slow-speed target simulation device is characterized in that: the device comprises a vehicle body, a driving motor and transmission system, a whole vehicle running system, a braking system, a laser range finder, a wheel speed sensor and an I-shaped guide rail;
the whole vehicle running system consists of two groups of suspension mechanisms, a guide mechanism and a fifth wheel speed measuring mechanism;
the vehicle body is arranged at the upper part of the whole vehicle running system;
the driving motor and the transmission system are used for driving the whole vehicle running system and driving the ground slow-speed target simulation device to run;
the fifth wheel speed measuring mechanism is used for detecting the moving speed of the ground low-speed target simulation device along the I-shaped guide rail;
the wheel speed sensor is arranged at the wheel of the whole vehicle running system;
the laser range finders are arranged at the front end and the rear end of the vehicle body;
the I-shaped guide rail is arranged below the whole vehicle running system along the advancing direction parallel to the ground slow-speed target simulation device.
2. The ground slow target simulation apparatus of claim 1, wherein: the suspension mechanism consists of a suspension mounting plate, a suspension, an axle, a bearing seat and a wheel; the upper part of the suspension mounting plate is used for mounting and supporting the vehicle body, and two ends of the suspension mounting plate are respectively provided with a suspension extending downwards; and bearing seats are respectively arranged at the lower ends of the suspensions and are used for mounting wheels and axles.
3. The ground slow target simulation apparatus of claim 1, wherein: the guide mechanism is arranged in the middle of the suspension mounting plate through a bracket; the lower end of the bracket is provided with two guide wheels, and the upper end surface of the I-shaped guide rail is clamped between the two guide wheels; the two guide wheels are respectively provided with an anti-tilting frame along the same side of the extension direction of the I-shaped guide rail, and the anti-tilting frame has a structure extending towards the concave part of the I-shaped guide rail.
4. The ground slow target simulation apparatus of claim 3, wherein: the guide wheels are fixedly installed through the strip-shaped adjusting holes in the installing support.
5. The ground slow target simulation apparatus of claim 1, wherein: the fifth wheel speed measuring mechanism consists of a mounting bracket, a tension spring, a lever arm, a speed measuring wheel, a speed measuring gear and a speed measuring sensor; the mounting bracket is used for mounting and fixing the fifth wheel speed measuring mechanism on a suspension mechanism; the lower end of the mounting bracket is pivotally connected with the middle part of the lever arm; one end of the lever arm is provided with a speed measuring wheel and a speed measuring sensor, and the speed measuring sensor detects the speed of the speed measuring wheel through a speed measuring gear on the speed measuring wheel; the other end of the lever arm is connected with the mounting bracket through a tension spring, and is tensioned through the tension spring to provide downward pressure for the speed measuring wheel.
6. The ground slow target simulation apparatus of claim 1, wherein: the ground slow-speed target simulation device further comprises a cleaning mechanism which is composed of a manual clamp and a cleaning brush.
7. The ground slow target simulation apparatus of claim 1, wherein: the ground slow target simulation device further comprises: the vehicle-mounted control cabinet consists of a vehicle control unit, a power distribution control combination and a servo control combination, and the standby power system consists of a standby battery pack and a standby driving motor; the vehicle-mounted control cabinet is arranged at the lower end of the vehicle body; a mechanical installation interface, a communication interface, a power supply interface and a grounding pile of the load equipment are reserved above the vehicle body; the rear part of the vehicle body is also provided with a mechanical interface for installing a take-up and pay-off device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815094.3A CN112363125A (en) | 2020-08-13 | 2020-08-13 | Ground slow-speed target simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010815094.3A CN112363125A (en) | 2020-08-13 | 2020-08-13 | Ground slow-speed target simulation device |
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| Publication Number | Publication Date |
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| CN112363125A true CN112363125A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010815094.3A Pending CN112363125A (en) | 2020-08-13 | 2020-08-13 | Ground slow-speed target simulation device |
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| CN (1) | CN112363125A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86202859U (en) * | 1986-05-09 | 1987-07-29 | 中国人民解放军88352部队 | Tachometer for the fifth wheel of vehicle |
| JPH0638428U (en) * | 1992-10-28 | 1994-05-24 | 合資会社田端農機具製作所 | Fertilizer applicator, seeder or feeding device in fertilizer applicator |
| US20080231011A1 (en) * | 2007-03-22 | 2008-09-25 | Giorgio Bordini | Active axle suspension system |
| CN203268050U (en) * | 2013-04-28 | 2013-11-06 | 深圳市普乐方文化科技有限公司 | Steering device of track tourist coach and track tourist coach |
| CN206510710U (en) * | 2017-03-07 | 2017-09-22 | 熊国峰 | Electric car suspension |
| CN206884628U (en) * | 2017-05-18 | 2018-01-16 | 青岛四机设备工程有限公司 | A kind of APM trains engineering truck |
| CN108572259A (en) * | 2017-03-09 | 2018-09-25 | 华东交通大学 | A kind of novel locomotive speed measuring device |
| CN110244268A (en) * | 2019-06-19 | 2019-09-17 | 北京机械设备研究所 | A kind of ground target simulation system at a slow speed |
| CN110481149A (en) * | 2019-08-02 | 2019-11-22 | 杭州浙达精益机电技术股份有限公司 | A kind of steel plate printing machine and its speed measuring device |
-
2020
- 2020-08-13 CN CN202010815094.3A patent/CN112363125A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86202859U (en) * | 1986-05-09 | 1987-07-29 | 中国人民解放军88352部队 | Tachometer for the fifth wheel of vehicle |
| JPH0638428U (en) * | 1992-10-28 | 1994-05-24 | 合資会社田端農機具製作所 | Fertilizer applicator, seeder or feeding device in fertilizer applicator |
| US20080231011A1 (en) * | 2007-03-22 | 2008-09-25 | Giorgio Bordini | Active axle suspension system |
| CN203268050U (en) * | 2013-04-28 | 2013-11-06 | 深圳市普乐方文化科技有限公司 | Steering device of track tourist coach and track tourist coach |
| CN206510710U (en) * | 2017-03-07 | 2017-09-22 | 熊国峰 | Electric car suspension |
| CN108572259A (en) * | 2017-03-09 | 2018-09-25 | 华东交通大学 | A kind of novel locomotive speed measuring device |
| CN206884628U (en) * | 2017-05-18 | 2018-01-16 | 青岛四机设备工程有限公司 | A kind of APM trains engineering truck |
| CN110244268A (en) * | 2019-06-19 | 2019-09-17 | 北京机械设备研究所 | A kind of ground target simulation system at a slow speed |
| CN110481149A (en) * | 2019-08-02 | 2019-11-22 | 杭州浙达精益机电技术股份有限公司 | A kind of steel plate printing machine and its speed measuring device |
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Application publication date: 20210212 |