CN110631844A - Whole-body 360-degree full-coverage detection system and method for motor train unit - Google Patents
Whole-body 360-degree full-coverage detection system and method for motor train unit Download PDFInfo
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- CN110631844A CN110631844A CN201910843202.5A CN201910843202A CN110631844A CN 110631844 A CN110631844 A CN 110631844A CN 201910843202 A CN201910843202 A CN 201910843202A CN 110631844 A CN110631844 A CN 110631844A
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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
- G01M17/08—Railway vehicles
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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
- G01M17/08—Railway vehicles
- G01M17/10—Suspensions, axles or wheels
Abstract
The invention discloses a 360-degree full-coverage detection system for a whole motor train unit, which comprises a bottom detection device and a middle-upper detection device; the bottom detection device comprises a fan abnormal sound detection unit (2) and a contact type scratch detection device (8), wherein a deep flaw detection unit (3) is arranged at one end of the fan abnormal sound detection unit (2), and a wheel set appearance detection unit (4) is arranged at one end of the deep flaw detection unit (3); the middle-upper part detection device comprises a vehicle window image monitoring unit (1), a pantograph abrasion and pressure detection unit (9) and a vehicle roof equipment dynamic detection unit (10). The invention also discloses a corresponding method. According to the detection system, different detection modes are adopted according to different parts and positions of the motor train unit, the motor train unit can obtain detection results of all parts of the motor train unit through the detection shed, fault information of the motor train unit can be obtained quickly and efficiently, the detection efficiency is high, and workload of manual detection operation is reduced.
Description
Technical Field
The invention belongs to the technical field of rail vehicle repairing mechanical equipment, and particularly relates to a 360-degree full-coverage detection system and method for a whole motor train unit.
Background
By 2020, China will basically build up the most modern railway network and high-speed rail network with reasonable layout, wide coverage, high efficiency, convenience and perfect functions in the world, the national railway service mileage reaches about 15 kilometers, and the urban area covers more than 20 million people.
At present, the appearance inspection of the high-speed rail motor train unit in China is mainly finished by manual visual inspection, the first-level visual inspection of the motor train unit in an entire train needs 8 persons/time, wherein 2 persons extend to an inspection trench to detect the bottom of a train body, 2 persons walk in a carriage to detect the inside of the train, 1 person finishes the inspection of the actions of the train such as the lifting of a pantograph in a driver cab, and 3 persons walk on the train roof to detect the inspection of the train roof, the pantograph and other parts. As the number of attached motor train units in the motor train section (station) is increased, the overhaul workload is increased. As the motor train unit needs to be operated on the line in the daytime, the first-level repair detection of the motor train unit is finished at night. The maintenance personnel work late at night is influenced by night illumination conditions and the workload at night is easy to be tired, and the maintenance efficiency and effect are not ideal. Meanwhile, the grouping detection causes that the detection information is dispersed and independent, the information is difficult to share, and the comprehensive analysis of the motor train unit overhaul information is difficult to realize.
Under the condition of the current domestic adopted maintenance system, 1 line of standard motor train units need to be configured with 10 persons to complete the existing requirement content of primary and secondary maintenance operation. The pressure of primary and secondary repair of the motor train unit is increased along with the development of the high-speed rail in large strides in China, and the situation that the maintainers are in shortage is difficult to relieve in a short time.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a full-360-degree full-coverage detection system and method for a motor train unit.
In order to achieve the above object, according to one aspect of the present invention, a full-body-coverage detection system for a motor train unit is provided, which includes a bottom detection device and a middle-upper detection device; wherein the content of the first and second substances,
the bottom detection device comprises a fan abnormal sound detection unit arranged at the tail end and a contact type scratch detection unit arranged at the head part, wherein a deep flaw detection unit is arranged at one end of the fan abnormal sound detection unit, a wheel set appearance detection unit is arranged at one end of the deep flaw detection unit, a wheel tread defect dynamic image monitoring unit is arranged at one end of the contact type scratch detection unit, a brake pad detection unit is arranged at one end of the wheel tread defect dynamic image monitoring unit, and a walking part dynamic detection unit is arranged between the brake pad detection unit and the wheel set appearance detection unit;
the middle-upper detection device comprises a vehicle window image monitoring unit arranged on the middle steel frame, a pantograph abrasion and pressure detection unit arranged on the upper shed roof and a roof equipment dynamic detection unit, wherein the vehicle window image monitoring unit, the pantograph abrasion and pressure detection unit and the roof equipment dynamic detection unit are matched to complete train top detection.
Further, pantograph wearing and tearing and pressure detection unit includes pantograph, contact wire, measuring arm and force transducer, inside the contact wire was located measuring arm, one end with the pantograph contact, the other end with force transducer connects.
Further, the roof apparatus dynamic detection unit includes a surveillance camera, an SV top camera, a wear camera, and an SV side panel camera.
Further, the dynamic detection unit of the roof device further comprises a background plate, a slide photoelectric switch and a slide flash.
Furthermore, the fan abnormal sound detection unit and the deep flaw detection unit are arranged below the steel rail surface.
Furthermore, the wheel set appearance detection unit and the walking part dynamic detection unit are arranged on two sides of the steel rail.
Further, the brake pad detection unit and the contact type scratch detection are arranged on the outer side of the steel rail.
According to another aspect of the invention, a method for detecting the whole body degree full coverage of a motor train unit is provided, and the method is realized by applying the system for detecting the whole body degree full coverage of the motor train unit, and specifically comprises the following steps:
s1: upper detection: detecting the middle upper structure of the train through a vehicle window image monitoring unit, a pantograph abrasion and pressure detection unit and a roof equipment dynamic detection unit;
s2: and (3) lower part detection: the method comprises the steps of sequentially carrying out contact type scratch detection, a dynamic image monitoring unit of wheel tread defects, a brake pad detection unit, a dynamic detection unit of a walking part, a wheel set appearance detection unit, a deep flaw detection unit and a fan abnormal sound detection unit, and sequentially carrying out comprehensive detection on the wheel appearance and the chassis structure at the lower part of a train.
The invention provides a 360-degree full-coverage detection system for a whole motor train unit, which is applied to full-body detection of the motor train unit and specifically comprises the following steps:
an upper detection section: detecting the middle upper structure of the train through a vehicle window image monitoring unit, a pantograph abrasion and pressure detection unit and a roof equipment dynamic detection unit;
a lower detection section: the method comprises the steps of sequentially carrying out contact type scratch detection, a dynamic image monitoring unit of wheel tread defects, a brake pad detection unit, a dynamic detection unit of a walking part, a wheel set appearance detection unit, a deep flaw detection unit and a fan abnormal sound detection unit, and sequentially carrying out comprehensive detection on the wheel appearance and the chassis structure at the lower part of a train.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. according to the 360-degree full-coverage detection system, each detection subunit is reasonably designed, different detection modes are adopted according to different parts and positions of the motor train unit, the motor train unit can obtain detection results of all parts of the motor train unit through the detection shed, and fault information of the motor train unit can be quickly and efficiently obtained.
2. According to the 360-degree full-coverage detection system, the motor train unit passes through the detection shed in a self-traveling mode, the detection efficiency is high, and the workload of manual detection operation is reduced.
3. According to the 360-degree full-coverage detection system, the dynamic pantograph pressure detection structure can realize real-time detection of pantograph pressure, and a triangular measurement arm structure is adopted, so that the whole structure is stable and reliable.
Drawings
FIG. 1 is a perspective view of a full-body 360-degree full-coverage detection system of a motor train unit according to an embodiment of the invention;
FIG. 2 is a detection flow chart of a 360-degree full-coverage detection system for a whole motor train unit according to an embodiment of the invention;
FIG. 3 is a schematic view of a bottom detection device of a full-body 360-degree full-coverage detection system of a motor train unit according to an embodiment of the invention;
FIG. 4 is a schematic diagram of an upper middle detection device of a full-body 360-degree full-coverage detection system of a motor train unit according to an embodiment of the invention;
fig. 5 is a schematic diagram of a pantograph abrasion and pressure detection unit of a full-body 360-degree full-coverage detection system of a motor train unit according to an embodiment of the invention.
In all the figures, the same reference numerals denote the same features, in particular: the system comprises a 1-vehicle window image monitoring unit, a 2-fan abnormal sound detection unit, a 3-deep flaw detection unit, a 4-wheel pair appearance detection unit, a 5-running gear dynamic detection unit, a 6-brake pad detection unit, a 7-wheel tread defect dynamic image monitoring unit, an 8-contact type scratch detection unit, a 9-pantograph abrasion and pressure detection unit, a 10-vehicle roof equipment dynamic detection unit, a 91-pantograph, a 92-contact lead, a 93-measuring arm, a 94-tension sensor, a 101-background plate, a 102-sliding plate photoelectric switch, a 103-monitoring camera, a 104-SV top camera, a 105-abrasion camera, a 106-sliding plate flash and a 107-SV side plate camera.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and 2, the detection system includes a middle upper detection device and a bottom detection device. The train waiting to be detected enters the in-process that detects the canopy, carries out 360 degrees detections to whole train through well upper portion detection device and bottom detection device, detects and finishes the back and will obtain sound signal, image signal and wheel sensor signal centralized processing by the switch, later accomplishes the detection to this train waiting to be detected through detecting host computer and remote server with its transport surveillance center. The motor train unit whole-body 360-degree full-coverage detection system adopts different detection modes aiming at different parts and positions of the motor train unit, the motor train unit can obtain detection results of all parts of a vehicle through the detection shed, and fault information of the motor train unit can be obtained quickly and efficiently.
As shown in fig. 1 and fig. 3, the bottom detection device comprises a fan abnormal sound detection unit 2, a deep flaw detection unit 3, a wheel set appearance detection unit 4, a walking part dynamic detection unit 5, a brake pad detection unit 6, a wheel tread defect dynamic image monitoring unit 7 and a contact type scratch detection unit 8. Wherein fan abnormal sound detecting element 2 arranges the below that forms the rail face between the track rail, and fan abnormal sound detecting element 2 is located bottom detection device's rightmost end position, through record and the analysis to fan vibration range, judges out the fan and whether exist because of the dust can inhomogeneous adhere to the problem that leads to the dynamic balance of fan on the impeller destroyed, avoids taking place danger, improves the security of train. The deep flaw detection unit 3 is also arranged below a rail surface formed between the rail rails of the track, and meanwhile, the deep flaw detection unit 3 is adjacent to the fan abnormal sound detection unit 2 and is positioned on the left side of the fan abnormal sound detection unit 2. The whole deep flaw detection unit 3 is rectangular, preferably, ultrasonic flaw detection equipment is selected for the deep flaw detection unit 3, ultrasonic flaw detection has the characteristics of strong penetrating power, high sensitivity and accurate flaw detection effect, and meanwhile, direct contact with an object to be detected is not required, so that damage to a train and a bottom detection device can be avoided while accurate flaw detection is realized, and the safety and the feasibility of the 360-degree full-coverage detection system are improved. Wheel set appearance detecting element 4 front and back symmetry sets up on rail both sides step, be located deep level inspection unit 3 left side, detect the wheel set appearance through the camera that sets up on wheel set appearance detecting element 4, in time feed back to the staff when the wheel set takes place to warp and handle after, when guaranteeing rolling stock operation steady, reduce wheel rail interact power and running resistance, and guarantee the processing ovality and the eccentricity of axletree axle journal and wheel tread, and the axle journal tapering all must not exceed the regulation limit, increase the factor of safety of train, improve this 360 degrees full coverage detecting system's reliability.
In addition, the running gear dynamic detection unit 5 is located the wheel set appearance detection unit 4 left side, this running gear dynamic detection unit 5 includes mounting plate and sixteen independent camera devices, the mounting plate sets up in the track below, sixteen independent camera devices divide into four groups and set up respectively on two orbital both sides, and two camera devices in the middle of four camera devices of each group are followed in other two camera devices and are close to the track, and it can not cause the harm to running gear dynamic detection unit 5 normally to pass through to package simultaneously proves the train. The running gear dynamic detection unit 5 is used for detecting whether the train running gear is normal or not, so that the train has a reliable braking mechanism, the vehicle has a good braking effect, and the safety of the train is comprehensively guaranteed. The brake lining detection unit 6 is arranged on the left side of the dynamic detection unit 5 of the walking part, the brake lining detection unit 6 comprises two detection units, the detection units are respectively arranged on two tracks and used for detecting a brake lining of a train, the brake lining is ensured to be in a good state, the brake lining is prevented from breaking and falling off, the train is ensured to have a good braking effect, and the 360-degree full-coverage detection system is more comprehensive in function. Wheel tread defect dynamic image monitoring unit 7 arranges in brake lining detecting element 6 left side, and wheel tread defect dynamic image monitoring unit 7 includes eight camera unit and two mounting panels, the mounting panel symmetrical arrangement is in orbital front and back side, eight camera unit divide into two sets ofly to arrange respectively on two mounting panels, and every camera of camera unit all is partial to the rear side, so that go forward to train wheel tread and continuously observe, in time detect train wheel tread, further improve this 360 degrees full coverage detecting system's comprehensiveness and reliability. Simultaneously, contact scotch detects 8 and arranges in wheel tread defect dynamic image monitoring unit 7 left sides, and this contact scotch detects 8 and includes 2 mounting panels and 8 contact detecting element, and the mounting panel symmetrical arrangement is in orbital front and back side, and 8 contact detecting element divide into two sets ofly to arrange respectively on 2 mounting panels, guarantees simultaneously that contact detecting element can contact with the train wheel body under the condition that does not influence train operation. This contact is scotched detection 8 and is used for detecting the external scotch of wheel, further protects the train wheel body, guarantees the safe operation of train.
As shown in fig. 4, the middle upper detection device includes a window image monitoring unit 1, a pantograph wear and pressure detection unit 9, and a roof equipment dynamic detection unit 10. The vehicle window image monitoring unit 1 is arranged at a position three meters away from the top end of the steel rail and fixedly connected with steel frames on the left side and the right side through bolts, and preferably, the vehicle window image monitoring unit 1 is provided with a camera device and a photoelectric signal receiving device of a photoelectric switch. The camera device and the photoelectric signal receiving device are provided with an upper group and a lower group, the camera device is arranged on the left side at the upper position and used for detecting a left window, and the camera device is arranged on the right side at the lower position and used for detecting a right window. When the train to be detected runs to the position of the vehicle window image monitoring unit 1, the camera device is started through triggering of the photoelectric switch, and then a video signal obtained by the camera device is transmitted to the monitoring center to complete detection of the vehicle window position.
Further, a roof device dynamic detection unit 10 is provided at an upper position of the steel frame structure, the roof device dynamic detection unit 10 including a background board 101, a sled photoelectric switch 102, a surveillance camera 103, an SV roof camera 104, a wear camera 105, a sled flash 106, and an SV side board camera 107. The background plates 101 are arranged on the steel frames on two sides in a bilateral symmetry mode and are steel plate structures parallel to a left rigid frame and a right rigid frame, on one hand, the background plates 101 are convenient for installing other structures of the dynamic detection unit 10 of the roof equipment, on the other hand, the background plates are convenient for providing for the monitoring cameras 103 and the SV top cameras 104, detection of the train to be detected is facilitated, and reliability of the 360-degree full-coverage detection system is improved. The slide photoelectric switches 102 are symmetrically arranged on the background plates 101 on the two sides and fixedly connected to the upper side of the SV side plate camera 107 through bolts, when a train to be detected enters the detection position, the upper structure of the train to be detected triggers the slide photoelectric switches 102, and the monitoring camera 103, the SV top camera 104, the abrasion camera 105, the slide flash 106 and the SV side plate camera 107 of the dynamic detection unit 10 of the roof equipment are opened to carry out comprehensive dynamic detection on the roof structure. Slide flash of light 106 sets up and is being connected and be fixed in the right side and extend steel frame structure rightmost end, should extend the steelframe from right-hand member steel frame board to the track middle part and extend, is located background board 101 upper end, flashes after receiving the signal that is spread by slide photoelectric switch 102, and the surveillance camera 103 of being convenient for, SV top camera 104, wearing and tearing camera 105 and SV curb plate camera 107 shoot and provide light, is favorable to improving the quality of shooing, improves this 360 degrees full coverage detecting system's comprehensiveness. The SV curb plate camera 107 bilateral symmetry sets up the background board 101 in both sides, is located slide photoelectric switch 102 lower extreme, and it begins to shoot after receiving the signal that is spread by slide photoelectric switch 102 through bolt with SV curb plate camera 107 fixed connection on background board 101 for detect the top outside structure, guarantee to wait to examine the comprehensive detection of train upper portion device. The surveillance camera 103 is located at the far right end of the left extension steel frame structure, which extends from the left steel frame plate to the middle of the rail and is maintained on the same horizontal plane as the right extension steel frame. The SV top camera 104 is positioned at the rightmost end of the top truss structure, which extends from the left steel frame plate to the middle of the track, and which is positioned on the left side of the extended steel frame. The monitoring camera 103 and the SV top camera 104 are used for detecting other top structures of the train to be detected, and after receiving a detection signal, start to shoot and transmit an acquired picture to a monitoring center to finish detection, so that the comprehensiveness of the 360-degree full-coverage detection system is further improved. The wear camera 105 is arranged at the middle position of the extending steel frame at the right side and used for detecting the wear of the pantograph 91 and ensuring the comprehensive detection of the train to be detected.
As shown in fig. 4, the pantograph wear and pressure detecting unit 9 includes a contact wire 92, a measuring arm 93, and a tension sensor 94. Wherein the whole hollow tripod structure that is of measuring arm 93, its left end is provided with decurrent extension rod, and the upper end is connected with the upper portion frame through the pin, guarantees simultaneously that measuring arm 93 can control the selection. The upper end of the tension sensor 94 is fixedly connected to the detection roof beam frame, and the lower end is connected to the measuring arm for detecting the pressure of the pantograph 91. The contact wire 92 is arranged inside the hollow structure of the measuring arm 93, and both ends are respectively used for connecting the upper part of the pantograph 91 and the lower part of the tension sensor 94, on one hand, when the pantograph 91 receives power, the contact wire 92 transmits a voltage signal to the switch, on the other hand, the contact wire 92 is driven by the up-and-down movement of the pantograph 91, then the lower end of the tension sensor 94 is driven to complete the pressure test of the pantograph 91, and meanwhile, the abrasion of the pantograph 91 is detected by the contact with the pantograph 91. The pantograph 91 can work normally, and the comprehensiveness of the 360-degree full-coverage detection system is improved.
The invention discloses a 360-degree full-coverage detection system for a whole motor train unit, which adopts the following principle and steps of full-coverage detection:
wait to examine train and drive into this detection canopy by the left end, along with waiting to examine the marcing of train, this 360 degrees full coverage detecting system divide into about two parts detect it:
an upper detection section: the upper structure in the train is detected through the vehicle window image monitoring unit 1, the pantograph abrasion and pressure detection unit 9 and the roof equipment dynamic detection unit 10, and the safe operation of the train is ensured.
A lower detection section: the device sequentially comprises a contact type scratch detection unit 8, a dynamic image monitoring unit 7 for wheel tread defects, a brake pad detection unit 6, a dynamic detection unit 5 for a walking part, a wheel set appearance detection unit 4, a deep flaw detection unit 3 and a fan abnormal sound detection unit 2, the wheel appearance and the chassis structure at the lower part of the train are comprehensively detected, and the safe operation of the train is further ensured.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A360-degree full-coverage detection system for a whole motor train unit is characterized by comprising a bottom detection device and a middle-upper detection device; wherein the content of the first and second substances,
the bottom detection device comprises a fan abnormal sound detection unit (2) arranged at the tail end and a contact type scratch detection unit (8) arranged at the head part, wherein a deep flaw detection unit (3) is arranged at one end of the fan abnormal sound detection unit (2), a wheel set appearance detection unit (4) is arranged at one end of the deep flaw detection unit (3), a wheel tread defect dynamic image monitoring unit (7) is arranged at one end of the contact type scratch detection unit (8), a brake pad detection unit (6) is arranged at one end of the wheel tread defect dynamic image monitoring unit (7), and a walking part dynamic detection unit (5) is arranged between the brake pad detection unit (6) and the wheel set appearance detection unit (4);
the middle-upper detection device comprises a vehicle window image monitoring unit (1) arranged on a middle steel frame, a pantograph abrasion and pressure detection unit (9) arranged on an upper shed roof and a roof equipment dynamic detection unit (10), wherein the vehicle window image monitoring unit (1), the pantograph abrasion and pressure detection unit (9) and the roof equipment dynamic detection unit (10) are matched to complete train top detection.
2. The 360-degree full-coverage detection system for the whole body of the motor train unit as claimed in claim 1, wherein the pantograph abrasion and pressure detection unit (9) comprises a pantograph (91), a contact wire (92), a measurement arm (93) and a tension sensor (94), the contact wire (92) is arranged inside the measurement arm (93), one end of the contact wire is in contact with the pantograph (91), and the other end of the contact wire is connected with the tension sensor (94).
3. The 360-degree full-coverage detection system for the whole body of the motor train unit according to claim 1, wherein the dynamic detection unit (10) of the roof equipment comprises a monitoring camera (103), an SV top camera (104), a wear camera (105) and an SV side plate camera (107).
4. The full-body 360-degree full-coverage detection system of the motor train unit according to claim 1 or 3, wherein the dynamic detection unit (10) of the roof equipment further comprises a background plate (101), a slide photoelectric switch (102) and a slide flashing (106).
5. The whole-body 360-degree full-coverage detection system of the motor train unit according to claim 1, wherein the fan abnormal sound detection unit (2) and the deep flaw detection unit (3) are arranged below a rail surface.
6. The 360-degree full-coverage detection system for the whole motor train unit according to claim 1, wherein the wheel set shape detection unit (4) and the running gear dynamic detection unit (5) are arranged on two sides of a steel rail.
7. The 360-degree full-coverage detection system for the whole motor train unit according to claim 1, wherein the brake pad detection unit (6) and the contact type scratch detection unit (8) are arranged on the outer side of the steel rail.
8. A whole-body 360-degree full-coverage detection method of a motor train unit is realized by applying the whole-body 360-degree full-coverage detection system of the motor train unit according to any one of claims 1 to 7, and specifically comprises the following steps:
s1: upper detection: detecting an upper structure in the train through a vehicle window image monitoring unit (1), a pantograph abrasion and pressure detection unit (9) and a roof equipment dynamic detection unit (10);
s2: and (3) lower part detection: the device sequentially comprises a contact type scratch detection unit (8), a dynamic image monitoring unit (7) of wheel tread defects, a brake lining detection unit (6), a dynamic detection unit (5) of a walking part, a wheel set appearance detection unit (4), a deep flaw detection unit (3) and a fan abnormal sound detection unit (2), and the wheel appearance and the chassis structure of the lower part of the train are comprehensively detected.
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| CN201910843202.5A CN110631844A (en) | 2019-09-06 | 2019-09-06 | Whole-body 360-degree full-coverage detection system and method for motor train unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112249084A (en) * | 2020-10-29 | 2021-01-22 | 中铁第四勘察设计院集团有限公司 | Intelligent comprehensive detection system is repaiied to EMUs one-level |
| CN114754687A (en) * | 2022-04-15 | 2022-07-15 | 中科海拓(无锡)科技有限公司 | Be used for 360 degrees developments pantograph carbon slide thickness detecting systems of motor car |
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2019
- 2019-09-06 CN CN201910843202.5A patent/CN110631844A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112249084A (en) * | 2020-10-29 | 2021-01-22 | 中铁第四勘察设计院集团有限公司 | Intelligent comprehensive detection system is repaiied to EMUs one-level |
| CN112249084B (en) * | 2020-10-29 | 2022-03-29 | 中铁第四勘察设计院集团有限公司 | Intelligent comprehensive detection system is repaiied to EMUs one-level |
| CN114754687A (en) * | 2022-04-15 | 2022-07-15 | 中科海拓(无锡)科技有限公司 | Be used for 360 degrees developments pantograph carbon slide thickness detecting systems of motor car |
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