CN114132807A - Power box winding and unwinding control system - Google Patents
Power box winding and unwinding control system Download PDFInfo
- Publication number
- CN114132807A CN114132807A CN202111461600.4A CN202111461600A CN114132807A CN 114132807 A CN114132807 A CN 114132807A CN 202111461600 A CN202111461600 A CN 202111461600A CN 114132807 A CN114132807 A CN 114132807A
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- Prior art keywords
- control system
- power
- button
- winding
- pay
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4402—Guiding arrangements to control paying-out and re-storing of the material
- B65H75/4405—Traversing devices; means for orderly arranging the material on the drum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4481—Arrangements or adaptations for driving the reel or the material
- B65H75/4486—Electric motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/34—Handled filamentary material electric cords or electric power cables
Landscapes
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
The invention discloses a power box take-up and pay-off control system, and relates to the technical field of power boxes. The invention relates to a take-up and pay-off control system, which comprises a control panel, a groove type screw rod winding displacement structure and a moment feedback control system, on the basis of a traditional power box, a winding displacement mechanism of a groove type screw rod is added, a torque sensor is arranged in a winding shaft and used for detecting the winding and unwinding state and controlling the power-assisted driving or the electric driving of a motor, the winding and unwinding control system keeps the mode of manual winding and unwinding, meanwhile, the reliable blocking detection is added, the phenomena of motor burnout or power supply box body movement, toppling and the like caused by cable blocking are avoided, an electric wire collecting mode is added in the wire collecting and releasing process of the power supply box, the blocking detection is matched, the labor consumption is reduced, and meanwhile, the safety is increased, power supply box receive and releases line system and add helping hand unwrapping wire mode, only the pulling just has the helping hand, only need alone alright in order to accomplish work, the consumption of using manpower sparingly simultaneously.
Description
Technical Field
The invention relates to the technical field of power boxes, in particular to a power box take-up and pay-off control system.
Background
At present, in an electrical test and overhaul site, because the specific working position is not fixed, temporary wiring or prolonged wiring is often needed to meet the power supply requirement of a test instrument. During the use process, the cable is always pulled out manually, and then is retracted after the cable is pulled out. The take-up process has the following problems in actual operation:
1. when the cable is long, manual winding is time-consuming and labor-consuming, and the working efficiency is affected;
2. the manual wire rewinding speed is difficult to keep stable, the cable is easily distributed on the wire winding roll in uneven tightness degree, and smooth wire unwinding is affected;
3. during paying off, the power box is manually pulled, and due to the friction force between cables, one person is required to fix the power box, and the other person pulls the cable with force, so that the cable extension line can be smoothly pulled to the specified position.
4. When the electric wire winding is carried out, if the cable is blocked by foreign matters, the internal motor is easily burnt out, or the traction power box moves, so that the site safety risk is increased.
In a word, the winding and unwinding method adopted by the current mobile power supply box greatly influences the field work efficiency and the work requirement, so the winding and unwinding method needs to be upgraded urgently to improve the work efficiency and meet the field requirement.
The invention relates to an automatic take-up and pay-off control system which is specially used for improving a traditional power box. A groove type double-wire-returning rod structure controlled by a servo motor is added above an original manual winding reel, and a torque sensor is added to judge the winding and unwinding states so as to deal with various emergency situations of on-site cables.
Disclosure of Invention
The invention provides a power box winding and unwinding control system which is used for controlling winding and unwinding wires when a power box in a building construction or electrical overhaul and test site needs to prolong a wiring cable.
In order to achieve the purpose, the invention provides the following technical scheme: a power box take-up and pay-off control system comprising:
the control panel is used for monitoring the state of a system, an LCD (liquid crystal display), a warning lamp panel, an input control disconnecting link, an AC 220V output I type, an automatic control operation area, a wire releasing control button, a locking button, a wire collecting control button, an operation area, a manual operation button, a leakage protector and an AC 220V output II type are respectively arranged on the control panel, the AC 220V output II type is arranged below the LCD, the AC 220V output I type is arranged below the AC 220V output II type, the operation area is arranged below the AC 220V output I type and is divided into the automatic control operation area and the manual operation button, the related operation state is indicated through the warning lamp and the LCD, and the system is controlled to operate through other buttons;
the groove type lead screw winding displacement structure comprises a support sliding rod, a wire clamping device and a reciprocating groove type lead screw, wherein the wire clamping device is movably arranged on the support sliding rod, the wire clamping device is provided with a winding shaft through power cable transmission, the winding shaft is uniformly wound with a power cable, a groove clamping device is arranged at the bottom of the wire clamping device, and the winding shaft is in transmission connection with the reciprocating groove type lead screw through a belt transmission structure;
the moment feedback control system comprises a take-up electric control system and a pay-off power-assisted control system, a moment sensor is arranged on the inner wall of the winding shaft, a servo motor is arranged at one end of the winding shaft, and a manual rocker is arranged at the other end of the winding shaft.
Furthermore, a paying-off control button, a locking button and a wire-collecting control button are sequentially arranged in the automatic control operation area from left to right.
Furthermore, a leakage protector and an input control switch are sequentially arranged from left to right below the warning lamp panel.
Furthermore, the warning light panel is provided with an abnormal warning light and a normal warning light, and the abnormal warning light and the normal warning light are used for indicating relevant running states.
Furthermore, the reciprocating groove type screw rod adopts a reciprocating groove design, and the groove type screw rod drives the wire clamping device to adjust the arrangement of the power cables on the winding shaft through traction control of the groove type screw rod on the groove clamping device.
Further, electric connection between torque sensor and the inside motor controller of power supply box, receive line electric control system's operation flow is: after a take-up button is pressed down, a servo motor is started to start to rotate at a constant speed, a coaxial winding shaft rotates along with the winding shaft, a belt conveying structure pulls a groove type screw rod, and a groove clamping device starts to reciprocate on the groove type screw rod to realize orderly arrangement of cables.
Furthermore, the operation flow of the paying-off power-assisted control system is that after a paying-off button is pressed, the system enters paying-off control, when a worker pulls a cable outwards, a torque sensor detects external force traction, power-assisted rotation is started immediately, the cable can be pulled out easily, when the external force traction is lost, the torque sensor loses an external force signal, a servo motor stops rotating, and the cable is prevented from being output too much.
Furthermore, the locking button is used for safely starting winding and unwinding to prevent mistaken touch, and when the automatic winding or unwinding is started, the locking button needs to be pressed first and then the corresponding function button is pressed, so that the effect can be achieved.
Compared with the prior art, the invention provides a power box take-up and pay-off control system, which has the following beneficial effects:
1. according to the power box take-up and pay-off control system, the wire arrangement structure is added, so that cables are prevented from being blocked in the box body and are arranged in order.
2. According to the power box take-up and pay-off control system, an electric take-up mode is added in the power box take-up and pay-off process, and the power box is provided with a blocking detection device, so that the safety is improved while the manpower consumption is reduced.
3. This power supply box receive and releases line control system, power supply box receive and releases line system and adds the helping hand unwrapping wire mode, only pulls and just has the helping hand, only needs alone alright in order to accomplish work, the consumption of using manpower sparingly simultaneously.
Drawings
FIG. 1 is a diagram of a control panel of the power box of the present invention;
FIG. 2 is a mechanical schematic of the pay-off and take-up control system of the present invention;
FIG. 3 is a schematic view of the location of the torque sensor of the present invention;
FIG. 4 is a pay-off control block diagram of the present invention;
fig. 5 is a wire rewinding control block diagram of the present invention.
In the figure: 1. an LCD liquid crystal display screen; 2. a warning light panel; 3. inputting a control knife switch; 4. alternating current 220V outputs I type; 5. an automatic control operation area; 6. a pay-off control button; 7. a locking button; 8. a wire take-up control button; 9. an operation area; 10. a manual operation button; 11. a leakage protector; 12. alternating current 220V outputs II type; 13. supporting the sliding rod; 14. a wire clamping device; 15. a reciprocating groove type screw rod; 16. a torque sensor; 17. a belt conveying structure; 18. a servo motor; 19. a manual rocker; 20. a spool; 21. a card slot device; 22. a power cable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the winding and unwinding control system according to the present invention adds a winding mechanism of a slotted screw based on a conventional power box, and simultaneously installs a torque sensor inside a winding shaft for detecting a winding and unwinding state and controlling a motor to be power-assisted driven or electrically driven, wherein the winding and unwinding control system maintains a manual winding and unwinding mode, and also adds a reliable blocking detection to prevent a cable from being blocked to cause a motor burnout or a power box body to move or topple.
The invention specifically discloses a power box take-up and pay-off control system, which comprises:
as shown in fig. 1, a control panel for monitoring the system state, the control panel is respectively provided with an LCD liquid crystal display 1, a warning light panel 2, an input control switch 3, an ac 220V output I-type 4, an automatic control operation area 5, a wire releasing control button 6, a locking button 7, a wire retrieving control button 8, an operation area 9, a manual operation button 10, a leakage protector 11 and an ac 220V output II-type 12, an AC 220V output II-type 12 is arranged below the LCD screen 1, an AC 220V output I type 4 is arranged below the AC 220V output II type 12, an operation area 9 is arranged below the alternating current 220V output I type 4, the operation area 9 is divided into an automatic control operation area 5 and a manual operation button 10, the related operation state is indicated through the warning lamp 2 and the LCD screen 1, and the operation of the system is controlled through other buttons.
As shown in fig. 2, the groove type lead screw winding displacement structure includes a support slide bar 13, a wire clamping device 14 and a reciprocating groove type lead screw 15, the wire clamping device 14 is movably disposed on the support slide bar 13, the wire clamping device 14 is provided with a winding shaft 20 through a power cable 22 in a transmission manner, the winding shaft 20 is uniformly wound with the power cable 22, a groove clamping device 21 is disposed at the bottom of the wire clamping device 14, and the winding shaft 20 is connected with the reciprocating groove type lead screw 15 through a belt transmission structure 17 in a transmission manner; through slot type lead screw 15 to draw control of draw-in groove ware 21, drive fixing-line device 14 and adjust the cable and arrange on the spool 20, the slot type lead screw adopts reciprocal groove design, when the draw-in groove ware moves 15 edges of lead screw in the same place, can adjust the direction according to the orbit in groove to realize the orderly range on spool 20 of cable successive layer, avoided the cable to tie a knot in a jumble, the influence normally is qualified for the next round of competitions and receives the line.
As shown in fig. 2-3, the moment feedback control system includes a take-up electric control system and a pay-off assisting control system, a moment sensor 16 is disposed on an inner wall of the winding shaft 20, a servo motor 18 is disposed at one end of the winding shaft 20, and a manual rocker 19 is disposed at the other end of the winding shaft 20.
The operation flow of the wire take-up electric control system is shown in fig. 4, when the wire take-up button 8 is pressed, the servo motor 18 is started to start to rotate at a constant speed, the coaxial wire spool 20 rotates along with the servo motor, the belt transmission structure 17 pulls the groove-type screw rod 15, and the groove clamping device 21 starts to reciprocate on the groove-type screw rod 15, so that the ordered arrangement of the cables is realized. When the cable is blocked due to foreign matters outside the box body or inside the box body, the threshold value of the torque sensor detects and gives an alarm, and the motor stops rotating immediately to prevent the motor from being burnt. Meanwhile, a warning red light on the control panel is turned on, the information panel displays cable jamming information, field workers perform jamming elimination and then recover wire winding operation, when the fact that cable arrangement is complete is detected, the fact that cable recovery is finished is indicated, the servo motor 18 automatically stops working, and automatic control is quitted.
The operation flow of the paying-off power-assisted control system is shown in fig. 5, when a paying-off button 6 is pressed, the system enters paying-off control, when a worker pulls a cable outwards, a torque sensor 16 detects external force traction, power-assisted rotation is started immediately, the cable can be pulled out easily, when the external force traction is lost, the torque sensor 16 loses an external force signal, a servo motor 18 stops rotating, and the situation that the cable is output too much to influence the site is avoided.
The automatic control operation area 5 for taking up and paying off comprises a locking button 7 which is used for safely starting taking up and paying off to prevent mistaken touch. When starting automatic receipts line or unwrapping wire, need press locking button 7 earlier, then press corresponding function button again, just can be effective, and the system has remain manual operation flow, and when the system was in automatic operation, press locking button 7, can directly switch over into manual operation, and the motor was in free rotation state this moment, and ordinary manual operation effect is unanimous.
This power supply box receive and releases line control system, power supply box receive and release line control system has increased the winding displacement structure, prevents that the cable from blocking in the box, arranges in good order, power supply box receive and releases line process and adds electronic receipts line mode, is furnished with the card and hinders the detection, when reducing manpower consumption, has increased the security, power supply box receive and release line system and add helping hand unwrapping wire mode, only the pulling just has the helping hand, only need alone alright with accomplish work, the consumption of using manpower sparingly simultaneously.
Specifically, a paying-off control button 6, a locking button 7 and a winding-up control button 8 are sequentially arranged from left to right in the automatic control operation area 5.
Specifically, the earth leakage protector 11 and the input control switch 3 are sequentially arranged from left to right below the warning lamp panel 2.
Specifically, the warning light panel 2 is provided with an abnormal warning light and a normal warning light, and the abnormal warning light and the normal warning light are used for indicating a related running state.
Specifically, the reciprocating groove type screw rod 15 adopts a reciprocating groove design, and the groove type screw rod 15 drives the wire clamping device 14 to adjust the arrangement of the power cables 22 on the winding shaft 20 through the traction control of the groove type screw rod 15 on the groove clamping device 21.
Specifically, the torque sensor 16 is electrically connected with a motor controller inside the power box.
In conclusion, the power box pay-off and take-up control system is internally provided with the groove type lead screw winding displacement structure, so that the situation that the cables are blocked in the box body when entering and exiting the box body is prevented, the cables are arranged orderly, and the use of a subsequent automatic control system is facilitated; an electric wire winding mode is built in, and jamming detection is matched, so that the safety is improved while the labor consumption is reduced; the helping hand unwrapping wire mode, only the staff pulls the cable and just can produce the helping hand, need not fixed power supply box, only need alone alright with accomplish work, the consumption of using manpower sparingly simultaneously.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a power supply box receive and releases line control system which characterized in that includes:
the control panel is used for monitoring the state of the system, the control panel is respectively provided with an LCD (liquid crystal display) screen (1), a warning lamp panel (2), an input control disconnecting link (3), an AC 220V output I type (4), an automatic control operation area (5), a wire releasing control button (6), a locking button (7), a wire winding control button (8), an operation area (9), a manual operation button (10), a leakage protector (11) and an AC 220V output II type (12), the AC 220V output II type (12) is arranged below the LCD screen (1), the AC 220V output I type (4) is arranged below the AC 220V output II type (12), the operation area (9) is arranged below the AC 220V output I type (4), the operation area (9) is divided into the automatic control operation area (5) and the manual operation button (10), the related operation state is indicated through a warning lamp panel (2) and an LCD (liquid crystal display) screen (1), and other buttons are used for controlling the operation of the system;
the groove type screw rod winding displacement structure comprises a support slide rod (13), a wire clamping device (14) and a reciprocating groove type screw rod (15), wherein the wire clamping device (14) is movably arranged on the support slide rod (13), the wire clamping device (14) is provided with a winding shaft (20) through a power cable (22) in a transmission mode, the power cable (22) is uniformly wound on the winding shaft (20), a groove clamping device (21) is arranged at the bottom of the wire clamping device (14), and the winding shaft (20) is in transmission connection with the reciprocating groove type screw rod (15) through a belt transmission structure (17);
moment feedback control system, moment feedback control system is including receiving line electric control system and unwrapping wire helping hand control system, the inner wall of hank (20) is provided with torque sensor (16), the one end of hank (20) is provided with servo motor (18), the other end of hank (20) is provided with manual rocker (19).
2. The power box take-up and pay-off control system as claimed in claim 1, wherein: and a paying-off control button (6), a locking button (7) and a winding-up control button (8) are sequentially arranged from left to right in the automatic control operation area (5).
3. The power box take-up and pay-off control system as claimed in claim 1, wherein: the lower part of the warning lamp panel (2) is sequentially provided with a leakage protector (11) and an input control disconnecting link (3) from left to right.
4. The power pack take-up and pay-off control system as claimed in claim 3, wherein: the warning lamp panel (2) is provided with an abnormal warning lamp and a normal warning lamp, and the abnormal warning lamp and the normal warning lamp are used for indicating relevant running states.
5. The power box take-up and pay-off control system as claimed in claim 1, wherein: the reciprocating groove type screw rod (15) adopts a reciprocating groove design, and the groove type screw rod (15) is used for controlling the traction of the groove clamping device (21) to drive the wire clamping device (14) to adjust the arrangement of the power cables (22) on the winding shaft (20).
6. The power box take-up and pay-off control system as claimed in claim 1, wherein: the torque sensor (16) is electrically connected with the motor controller in the power box, and the operation flow of the take-up electric control system is as follows: after a take-up button (8) is pressed down, a servo motor (18) is started to start to rotate at a constant speed, a coaxial winding shaft (20) rotates along with the servo motor, a belt conveying structure (17) pulls the groove type screw rod (15), and the groove clamping device (21) starts to reciprocate on the groove type screw rod (15) to realize orderly arrangement of cables.
7. The power pack take-up and pay-off control system as claimed in claim 6, wherein: the paying-off power-assisted control system is characterized in that after a paying-off button (6) is pressed, the system enters paying-off control, when a worker pulls a cable outwards, a torque sensor (16) detects external force traction, power-assisted rotation is started immediately, the cable can be pulled out easily, when the external force traction is lost, the torque sensor (16) loses an external force signal, a servo motor (18) stops rotating, and the cable is prevented from being output too much.
8. The power box take-up and pay-off control system as claimed in claim 1, wherein: the locking button (7) is used for safely starting to take up and pay off, prevents the mistaken touch, and when the automatic take-up or pay-off is started, the locking button (7) needs to be pressed down firstly, and then the corresponding function button is pressed, so that the locking button is effective.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461600.4A CN114132807B (en) | 2021-12-02 | 2021-12-02 | Power supply box coiling and uncoiling control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461600.4A CN114132807B (en) | 2021-12-02 | 2021-12-02 | Power supply box coiling and uncoiling control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114132807A true CN114132807A (en) | 2022-03-04 |
| CN114132807B CN114132807B (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111461600.4A Active CN114132807B (en) | 2021-12-02 | 2021-12-02 | Power supply box coiling and uncoiling control system |
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| Country | Link |
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| CN (1) | CN114132807B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117087521A (en) * | 2023-10-18 | 2023-11-21 | 河南睿迈科智能科技有限公司 | Weighing positioning trackless flatcar |
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| CN113479706A (en) * | 2021-07-26 | 2021-10-08 | 成都飞机工业（集团）有限责任公司 | Rapid automatic take-up device compatible with various aviation cables and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107942789A (en) * | 2017-11-17 | 2018-04-20 | 深圳市科比特航空科技有限公司 | Folding and unfolding thread control device and take-up and pay-off device |
| CN209467979U (en) * | 2018-10-31 | 2019-10-08 | 东莞天速通信技术有限公司 | A kind of device of automatic deploying and retracting aircraft cable |
| CN111232764A (en) * | 2018-11-29 | 2020-06-05 | 浙江贝尔技术有限公司 | Mooring type unmanned aerial vehicle winding and unwinding device |
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| CN117087521A (en) * | 2023-10-18 | 2023-11-21 | 河南睿迈科智能科技有限公司 | Weighing positioning trackless flatcar |
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| Publication number | Publication date |
|---|---|
| CN114132807B (en) | 2023-09-15 |
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