A wire and cable length measuring device and a wire and cable length measuring method

Abstract

The present invention discloses a wire and cable length measuring device and a wire and cable length measuring method, wherein the wire and cable length measuring device comprises at least two groups of measuring tool strings, each group of measuring tool strings comprises at least one measuring vehicle and at least two driving vehicles, and each measuring vehicle is located between two adjacent driving vehicles; the measuring vehicle and the driving vehicle both comprise a shell and a crawler, a groove for crawler running is provided under the shell, a plurality of parallel supporting rollers are provided along the length direction of the groove, the two ends of the rotating shaft of each supporting roller extend into the inner cavity of the shell from the side walls on both sides of the groove respectively, and each rotating shaft is rotatably sealed and connected with the corresponding side wall; all the supporting rollers of each shell are connected through a crawler transmission, and the outer surface of each crawler chain link is provided with an anti-skid pad. The present invention uses the driving vehicle as the power, travels and measures along the length direction of the wire and cable, and solves the problem that the existing wire length measuring instrument does not have the function of traveling and measuring along the wire and cable.

Description

Technical Field

[0001] The invention belongs to the technical field of electric wires and cables, and in particular, relates to an electric wire and cable length measuring device and an electric wire and cable length measuring method. Background Art

[0002] There are many types of conventional wire and cable length measuring instruments, such as resistance measuring instruments based on Ohm's law, laser Doppler speed and length measuring instruments using the laser Doppler effect, and transmission length measuring instruments that use a meter wheel in direct contact with the wire and cable and convert the number of rotations of the meter wheel into the length of the wire and cable.

[0003] The above wire length measuring instruments have different advantages and disadvantages. For example, the resistance measuring instrument needs to connect the cable to the circuit, and its measurement accuracy is affected by the ambient temperature. It also needs to disconnect the cable circuit and is not suitable for multi-strand cables. The meter wheel wire measuring instrument is not affected by temperature, which solves the problem that the printed length mark on the surface of the wire is damaged and cannot be measured. In addition, the measurement accuracy of the meter wheel wire measurement can reach 0.001 meter, which also solves the problem of insufficient accuracy of the length printing mark.

[0004] The above-mentioned wire length measuring instrument can be used for conventional measurement requirements, but it is not suitable for measuring the length of live cables and wires, underwater cables and wires, etc. The reasons are as follows:

[0005] 1. Underwater measurement requires that the wire length measuring instrument itself is waterproof. Existing wire length measuring instruments are all measured on the ground, and their sealing level is not enough.

[0006] 2. The live measurement cannot use the resistance of the wires and cables themselves. When the wires and cables are not connected to the circuit and do not move, the existing wire length measuring instruments do not have the function of measuring along the wires and cables. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a wire and cable length measuring device, comprising at least two groups of measuring tool strings, each group of measuring tool strings comprising at least one measuring vehicle and at least two traveling vehicles, and each measuring vehicle is located between two adjacent traveling vehicles; the measuring vehicle and the traveling vehicle each comprise a shell and a track, a groove for the running of the track is provided under the shell, a plurality of parallel supporting rollers are provided along the length direction of the groove, both ends of the rotating shaft of each supporting roller extend into the inner cavity of the shell from the side walls on both sides of the groove respectively, and each rotating shaft is rotatably sealed and connected to the corresponding side wall; all the supporting rollers of each shell are connected through a track transmission, and the outer surface of the chain link of each track is provided with an anti-skid pad; the shell of the measuring vehicle of each group of measuring tool strings is hingedly connected to the shell of the adjacent traveling vehicle, so that the tracks of all measuring vehicles and all traveling vehicles of each group of measuring tool strings are connected The tracks are all fitted to the outer surface of the wire or cable, and each adjacent group of measuring tool strings can be detachably connected by a connecting piece, so that all measuring tool strings are annularly buckled on the outside of the wire or cable and the moving direction of all tracks is consistent with the length direction of the wire or cable; a counting circuit control board and at least one counting component are provided in the shell of each measuring vehicle, each counting component is transmission-connected to the rotating shaft in the corresponding shell cavity, and each counting component is electrically connected to the corresponding counting circuit control board, and the mechanical energy of the rotating shaft is converted into an electrical signal through the counting component and sent to the counting circuit control board; at least one driving component is provided in the shell of each traveling vehicle, each driving component is transmission-connected to the rotating shaft in the corresponding shell cavity, and the corresponding rotating shaft and track are driven to rotate through the driving component, so that all measuring tool strings are synchronously moved along the wire or cable.

[0008] The beneficial effects of the wire and cable length measuring device of the present invention are:

[0009] 1. All the shells of each set of measuring tool strings adopt a sealed structure, and each shaft extending out of the shell is still sealed. Each driving vehicle and each measuring vehicle can be completely placed in an environment such as water, toxic gas, and water vapor mixture. It is particularly suitable for special scenarios such as underwater cable measurement, high-altitude cable measurement, oil and wire measurement, etc.

[0010] 2. Both the driving vehicle and the measuring vehicle adopt a crawler structure, and anti-skid pads are added on the outside of the crawler to enhance the friction between the crawler and the outer surface of the wires and cables. Compared with the existing groove wheel driving the wires, the contact area between the crawler and the wires and cables is larger, the possibility of relative movement between the two is smaller, and the measurement accuracy is higher.

[0011] 3. Each set of measuring tool strings is equipped with at least two traveling vehicles. All measuring tool strings are tightly wrapped around the wires and cables through connectors. The traveling vehicles serve as power and travel along the length direction of the wires and cables for measurement, thus solving the problem that the existing wire length measuring instruments are not capable of traveling and measuring along the wires and cables.

[0012] Preferably, each link includes a track plate and a track pin, and the track plates of each two adjacent links are hinged by a track pin. The outer surface of each track plate is provided with an anti-skid pad, and the outer surface of the anti-skid pad is provided with an arc surface adapted to the outer surface of the wire or cable, and the inner surface of each track plate is provided with a track tooth, and the side of each supporting wheel is distributed with a tooth groove adapted to the track tooth; the height of all track teeth is the same and not less than 2 / 3 of the radius of the supporting wheel. The anti-skid pad uses an arc surface to fit the wire and cable, and the two are in closer contact, further reducing the probability of relative sliding problems. In addition, each shell is provided with at least three supporting wheels, and the three supporting wheels have the same diameter and are all located in the same horizontal plane. With the use of extra-long track teeth, there is no relative displacement between the track and the supporting wheels, and the measuring vehicle collects data accurately. The three supporting wheels are in the same plane, and each supporting wheel can maintain an effective positive pressure on the wire and cable, thereby increasing the friction resistance between the track and the wire and cable.

[0013] Preferably, a meter wheel counting assembly and a laser encoder counting assembly are provided in the shell of each measuring vehicle, and the meter wheel counting assembly and the laser encoder counting assembly are electrically connected to the corresponding counting circuit control board respectively; the meter wheel counting assembly comprises a wheel body, a counter and a gear transmission group; the counter is installed at the upper part of the corresponding shell cavity, the wheel body is coaxially fixed to the input shaft of the counter, and the wheel body is transmission-connected with the corresponding rotating shaft in the shell through the gear transmission group, and the input shaft of the counter is driven to rotate through the rotating shaft; the laser encoder counting assembly comprises a laser transmitter, a laser receiver, a code disk and a gear transmission group; the laser transmitter and the laser receiver are both installed at the upper part of the corresponding shell cavity, and the laser transmitter and the laser receiver are directly opposite; the code disk is transmission-connected with the corresponding rotating shaft in the shell through the gear transmission group, and the code disk is located between the laser transmitter and the laser receiver, and the code disk is driven to rotate through the rotating shaft. Each measuring vehicle uses a meter wheel counting component and a laser encoder counting component. Although the rotation speed of the shaft input is equal for these two counting methods, the meter wheel counting component and the laser encoder counting component themselves may have faults. Using two different counting methods, on the one hand, it is convenient to verify the authenticity of the data, and on the other hand, it can realize the mutual inspection of the meter wheel counting component and the laser encoder counting component, further improving the accuracy of the measurement data.

[0014] Preferably, the driving assembly includes a motor and a synchronous belt transmission group; the motor is installed at the upper part of the corresponding inner cavity, and the output shaft of the motor is connected to the corresponding rotating shaft in the shell through the synchronous belt transmission group, and the corresponding rotating shaft is driven to rotate by the motor.

[0015] Preferably, the side wall of each groove is provided with a through hole adapted to the corresponding rotating shaft, and the through hole and the rotating shaft are connected in a rotating seal through a bearing and at least two sealing rings. The side wall of each through hole is provided with an open annular oil cavity, and at least one sealing ring is provided on each side of the annular oil cavity. The sealing rings on both sides of the annular oil cavity are in contact with the corresponding rotating shaft, thereby sealing the opening of the annular oil cavity; each annular oil cavity is provided with pressure oil. At the intersection of each rotating shaft and the housing, a double sealing ring oil cavity pressure oil seal is adopted, which is particularly suitable for special environments such as deep water, high-pressure gas, and corrosive environments, and has a high sealing level.

[0016] Preferably, each housing is provided with an articulated arm on both sides, and each articulated arm is bent downward; the articulated arms between each two adjacent housings of each set of measuring tool strings are hinged by a pin shaft; the connecting piece is an arc-shaped steel rod adapted to the wire or cable, and the two ends of each arc-shaped steel rod are respectively hinged to the articulated arms between the two adjacent sets of measuring tool strings. An elastic telescopic joint is provided in the middle of each arc-shaped steel rod; the elastic telescopic joint includes an arc-shaped sleeve, an arc-shaped telescopic rod and a tension spring, the tension spring is located in the inner cavity of the arc-shaped sleeve, the end of the arc-shaped telescopic rod is slidably sealed in the inner cavity of the arc-shaped sleeve, and the two ends of the tension spring are respectively fixedly connected to the bottom wall of the inner cavity and the end of the arc-shaped telescopic rod; the head end of the arc-shaped telescopic rod and the outer end of the arc-shaped telescopic rod are respectively fixedly connected to the middle of the arc-shaped steel rod, and the arc-shaped telescopic rod is pulled back into the arc-shaped sleeve by the tension of the tension spring, so that all the arc-shaped steel rods tighten the measuring tool string. The hinge direction between the articulated arms and between the articulated arms and the arc-shaped steel rod are both perpendicular to the wires and cables. The hinge direction is unique, which avoids dispersing the tension of the elastic expansion joint, improves the tightening effect of the elastic expansion joint, and keeps all tracks in close fit with the wires and cables.

[0017] The present invention also provides a method for measuring the length of wires and cables, based on the above-mentioned wire and cable length measuring device, the steps are as follows: S1, select an adaptive arc-shaped steel rod according to the outer diameter of the wire and cable; S2, at the measurement starting point, 2 to 5 groups of measuring tool strings are evenly distributed in a ring shape on the outer surface of the wire and cable, the crawler of each group of measuring tool strings is in contact with the outer surface of the wire and cable, and each adjacent group of measuring tool strings is hinged by an arc-shaped steel rod; S3, all driving vehicles and all measuring vehicles are equipped with independent power supplies, each driving vehicle is provided with a driving circuit control board electrically connected to the motor of the corresponding drive component, all driving vehicles are started synchronously, so that all measuring tool strings Move along the wires and cables and all the measuring vehicles move synchronously; S4. During the movement of the measuring vehicle, the track of the measuring vehicle drives the corresponding shaft to rotate, and the shaft drives the wheel body to rotate through the gear transmission group, thereby making the counter count and sending the count value to the corresponding counting circuit control board; the shaft drives the code disk to rotate through the gear transmission group, thereby making the laser receiver send the received laser signal to the counting circuit control board; S5. If the driving circuit control board detects that the driving vehicle cannot move during driving, the driving circuit control board stops all the motors for 3 minutes, and then executes the "obstacle crossing" program. In the "obstacle crossing" program, the driving circuit control board stops all the motors synchronously. Step reverse, after all the measuring tool strings travel L distance in the reverse direction, the driving circuit control board makes all the motors rotate forward synchronously and increases the motor torque; S6, if the distance traveled by the measuring tool string in the forward direction is greater than L, the driving circuit control board enters the "normal" program and continues to travel forward. If the distance traveled by the measuring tool string in the forward direction is ≤L and the measuring tool string cannot move, S5 is repeated up to 5 times, and the motor torque is gradually increased until the driving circuit control board enters the "normal" program to continue measuring, or the driving circuit control board enters the "return" program to terminate the measurement; S7, the 3-minute stop time in S5 is recognized by all the counting circuit control boards, and the counting circuit control boards calculate the distance according to the meter. The inversion data of the wheel counting component and the laser encoder counting component determine the number of times N that the "obstacle crossing" program is executed; S8, if the measuring tool string returns to the measuring starting point, the data of each measuring vehicle is a data group, and the data groups of all measuring vehicles are exported to an external calculator, the calculator compares all the data groups, and the data groups with the same data are taken as accurate data, if the deviation between the data of the remaining data groups and the accurate data exceeds 2%, the data group is discarded, if the deviation does not exceed 2%, the data is averaged with the accurate data to obtain the final data, the final data is the total distance S traveled by the measuring tool string, the computer obtains the distance between the measuring starting point and the obstacle point according to the formula, and the measurement ends;S9. If the measuring tool string reaches the measuring end point, the data of each measuring vehicle is a data group. The data groups of all measuring vehicles are exported to an external calculator. The calculator compares all the data groups. The data groups with the same data are taken as accurate data. If the deviation between the data of the remaining data groups and the accurate data exceeds 2%, the data group is discarded. If the deviation does not exceed 2%, the data is averaged with the accurate data to obtain the final data. The final data is the total distance P traveled by the measuring tool string. The computer obtains the length of the wire and cable between the measuring start point and the measuring end point according to the formula, and the measurement ends. ;

[0018] The wire and cable length measurement method of the present invention has the advantages that:

[0019] 1. Solve the problem that the existing conventional wire and cable measurement methods are not suitable for live measurement and measurement along the line.

[0020] 2. The "obstacle crossing" program is used for measurement, which can clear easily removable obstacles on the surface of cables and wires, and complete the cleaning of wires and cables while measuring.

[0021] 3. The "Obstacle Crossing" program can accurately feedback the location of obstacles and provide accurate distance parameters for subsequent obstacle clearance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of three sets of measuring tools in the present invention being fastened to electric wires and cables;

[0024] Figure 2 It is a schematic diagram of the internal structure of the measuring vehicle in the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the traveling vehicle in the present invention;

[0026] Figure 4 for Figure 2 Right view of;

[0027] Figure 5 It is a schematic diagram of the internal structure of the elastic expansion joint in the present invention.

[0028] Figure numerals: measuring tool string 1, measuring vehicle 2, traveling vehicle 3, shell 4, crawler track 5, groove 6, supporting wheel 7, rotating shaft 8, inner cavity 9, through hole 10, bearing 11, sealing ring 12, annular oil chamber 13, anti-skid pad 14, track shoe 15, track pin 16, track tooth 17, tooth groove 18, articulated arm 19, arc-shaped steel rod 20, elastic expansion joint 21, arc-shaped sleeve 22, arc-shaped expansion rod 23, tension spring 24, wheel body 25, counter 26, gear transmission group 27, laser transmitter 28, laser receiver 29, code disk 30, motor 31, synchronous belt transmission group 32, wire and cable 33, worm and worm wheel group 34, axial limit protrusion 35. DETAILED DESCRIPTION

[0029] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the present invention after long-term research and extensive practice. The following will further explain the technical solution, its implementation process and principle, etc. in conjunction with the drawings in the embodiments of this application and specific implementation cases.

[0030] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, the present invention covers any substitution, modification, equivalent method and scheme made on the spirit, principle and scope of the present invention defined by the claims. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of this application, unless otherwise clearly specified and limited, the technical or scientific terms used should have the usual meanings understood by persons with general skills in the field to which this application belongs. Terms such as "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Embodiment 1;

[0033] like Figure 1As shown, the first embodiment provides a wire and cable length measuring device, including three groups of measuring tool strings 1, each group of measuring tool strings 1 includes two measuring vehicles 2 and three driving vehicles 3, and each measuring vehicle 2 is located between two adjacent driving vehicles 3. This embodiment is limited to two measuring vehicles 2 and three driving vehicles 3, and a suitable number of measuring vehicles 2 and driving vehicles 3 can be selected according to the diameter parameters of the wire and cable 33. The larger the diameter of the wire and cable 33, the more the number of measuring tool strings 1, and the more the number of measuring vehicles 2 and driving vehicles 3. The specific number of measuring tool strings 1 is not limited in this embodiment.

[0034] All the measuring vehicles 2 and all the traveling vehicles 3 in this embodiment are similar in that they all include a housing 4 and a crawler 5, and a groove 6 for the crawler 5 to run is provided below the housing 4, and three parallel supporting rollers 7 are provided along the length direction of the groove 6, but it is not limited to three, and it can also be four or more. The two ends of the rotating shaft 8 of each supporting roller 7 extend into the inner cavity 9 of the housing 4 from the side walls on both sides of the groove 6, and each rotating shaft 8 is rotatably sealed and connected to the corresponding side wall. The specific structure of the rotating seal connection is as follows:

[0035] like Figure 2 and Figure 3 As shown, the side wall of each groove 6 is provided with a through hole 10 adapted to the corresponding rotating shaft 8, and the through hole 10 and the rotating shaft 8 are connected in a rotating seal through a bearing 11 and two sealing rings 12. The side wall of each through hole 10 is provided with an open annular oil cavity 13, and each side of the annular oil cavity 13 is provided with a sealing ring 12. The sealing rings 12 on both sides of the annular oil cavity 13 contact the corresponding rotating shaft 8, thereby sealing the opening of the annular oil cavity 13; each annular oil cavity 13 is provided with pressure oil. At the intersection of each rotating shaft 8 and the housing, a double sealing ring 12 is used to seal the oil cavity pressure oil, which is particularly suitable for special environments such as deep water, high-pressure gas, and corrosive environments, and has a high sealing level.

[0036] like Figure 3 and Figure 4As shown, in this embodiment, all the supporting rollers 7 of each housing 4 are connected by a crawler 5, and the outer surface of the chain link of each crawler 5 is provided with an anti-skid pad 14. The three supporting rollers 7 are in the same plane, and each supporting roller 7 can maintain an effective positive pressure on the wires and cables 33. The crawler 5 in this embodiment is formed by hingedly connecting a plurality of identical chain links in sequence, and all the chain links have the same structure. Each chain link includes a track plate 15 and a track pin 16. The track plates 15 of each two adjacent chain links are hinged by the track pin 16. The outer surface of each track plate 15 is provided with an anti-skid pad 14, and the outer surface of the anti-skid pad 14 is provided with an arc surface adapted to the outer surface of the wire or cable. The inner surface of each track plate 15 is provided with a track tooth 17, and the side of each supporting roller 7 is distributed with a tooth groove 18 adapted to the track tooth 17; the height of all track teeth 17 is the same and not less than 2 / 3 of the radius of the supporting roller 7. The anti-skid pad 14 is formed with an arc surface to fit the wire and cable 33, and the two are in closer contact, further reducing the probability of relative sliding. In addition, each housing 4 is provided with at least three supporting rollers 7, and the three supporting rollers 7 have the same diameter and are located on the same horizontal plane. With the use of extra-long track teeth 17, there is no relative displacement between the track 5 and the supporting roller 7, and the measuring vehicle 2 collects data accurately.

[0037] like Figure 1 , Figure 4 and Figure 5As shown, in this embodiment, the housing 4 of the measuring vehicle 2 of each set of measuring tool strings 1 is hingedly connected to the housing 4 of the adjacent driving vehicle 3. Specifically, each housing 4 is provided with an articulated arm 19 on both sides, and each articulated arm 19 is bent downward; the articulated arm 19 between each adjacent housing 4 of each set of measuring tool strings 1 is hinged by a pin. The tracks 5 of all measuring vehicles 2 and the tracks 5 of all driving vehicles 3 of each set of measuring tool strings 1 are attached to the outer surface of the wire or cable, and each adjacent set of measuring tool strings 1 can be detachably connected by a connecting piece, so that all measuring tool strings 1 are annularly buckled to the outside of the wire or cable and the moving direction of all tracks 5 is consistent with the length direction of the wire or cable. The connecting piece here is an arc-shaped steel rod 20 adapted to the wire or cable, and the two ends of each arc-shaped steel rod 20 are respectively hinged to the articulated arm 19 between the two adjacent sets of measuring tool strings 1. An elastic expansion joint 21 is provided in the middle of each arc-shaped steel rod 20; the elastic expansion joint 21 includes an arc-shaped sleeve 22, an arc-shaped expansion rod 23 and a tension spring 24, the tension spring 24 is located in the inner cavity 9 of the arc-shaped sleeve 22, the end of the arc-shaped expansion rod 23 is slidably sealed in the inner cavity 9 of the arc-shaped sleeve 22, and the two ends of the tension spring 24 are respectively fixedly connected to the bottom wall of the inner cavity 9 and the end of the arc-shaped expansion rod 23; the head end of the arc-shaped expansion rod 23 and the outer end of the arc-shaped expansion rod 23 are respectively fixedly connected to the middle of the arc-shaped steel rod 20, and the arc-shaped expansion rod 23 is pulled back into the arc-shaped sleeve 22 by the tension of the tension spring 24, so that all the arc-shaped steel rods 20 tighten the measuring tool string 1. The articulation direction between the articulated arms 19 and the articulation direction between the articulated arms 19 and the arc-shaped steel rod 20 are both perpendicular to the wires and cables 33. The articulation direction is unique, which avoids dispersing the tension of the elastic expansion joint 21, improves the tightening effect of the elastic expansion joint 21, and keeps all tracks 5 in close fit with the wires and cables 33.

[0038] like Figure 2As shown, in the present embodiment, a counting circuit control board and two counting components are arranged in the shell 4 of each measuring vehicle 2, or there may be three or more types, which is not limited in the present embodiment. Each counting component is transmission-connected to the rotating shaft 8 in the inner cavity 9 of the corresponding shell 4, and each counting component is electrically connected to the corresponding counting circuit control board, and the mechanical energy of the rotating shaft 8 is converted into an electrical signal through the counting component and sent to the counting circuit control board. Specifically, a meter wheel counting component and a laser encoder counting component are arranged in the shell 4 of each measuring vehicle 2, and the meter wheel counting component and the laser encoder counting component are electrically connected to the corresponding counting circuit control board respectively; the meter wheel counting component includes a wheel body 25, a counter 26 and a gear transmission group 27; the counter 26 is installed on the upper part of the inner cavity 9 of the corresponding shell 4, the wheel body 25 is coaxially fixed to the input shaft of the counter 26, and the wheel body 25 is transmission-connected to the corresponding rotating shaft 8 in the shell 4 through the gear transmission group 27, and the rotating shaft 8 in the shell 4 is connected to the counter 26 through the gear transmission group 27. The shaft 8 drives the input shaft of the counter 26 to rotate; the laser encoder counting assembly includes a laser transmitter 28, a laser receiver 29, a code disc 30 and a gear transmission group 27; the laser transmitter 28 and the laser receiver 29 are both installed on the upper part of the inner cavity 9 of the corresponding housing 4, and the laser transmitter 28 and the laser receiver 29 are directly opposite; the code disc 30 is connected to the corresponding rotating shaft 8 in the housing 4 through the gear transmission group 27, and the code disc 30 is located between the laser transmitter 28 and the laser receiver 29, and the code disc 30 is driven to rotate through the rotating shaft 8. Each measuring vehicle 2 adopts a meter wheel counting assembly and a laser encoder counting assembly. Although the rotation speed input by the rotating shaft 8 is equal in these two counting methods, the meter wheel counting assembly and the laser encoder counting assembly may have faults themselves. Using two different counting methods is convenient for verifying the authenticity of the data on the one hand, and can realize mutual inspection between the meter wheel counting assembly and the laser encoder counting assembly on the other hand, further improving the accuracy of the measurement data.

[0039] like Figure 3 As shown, two sets of drive components are arranged in the shell 4 of each traveling vehicle 3, or three sets of drive components, which are not limited in this embodiment. Each set of drive components is connected to the rotating shaft 8 in the inner cavity 9 of the corresponding shell 4, and the corresponding rotating shaft 8 and crawler 5 are driven to rotate by the drive components, so that all the measuring tool strings 1 are moved synchronously along the wires or cables. Specifically, the drive component includes a motor 31 and a synchronous belt transmission group 32; the motor 31 is installed on the upper part of the corresponding inner cavity 9, and the output shaft of the motor 31 is connected to the corresponding rotating shaft 8 in the shell 4 through the synchronous belt transmission group 32. In addition, a worm gear group 34 is also arranged between the synchronous belt transmission group 32 and the corresponding rotating shaft 8, which is used to change the transmission direction, and finally the corresponding rotating shaft 8 is driven to rotate by the motor 31. The two sets of drive components can be connected to the two ends of the same rotating shaft 8, or they can be connected to the ends of different rotating shafts 8, which are not limited in this embodiment.

[0040] All the outer shells in this embodiment adopt a sealed structure, and each rotating shaft 8 is still sealed when it extends out of the outer shell. Each traveling vehicle 3 and each measuring vehicle 2 can be completely placed in an environment such as water, toxic gas, or water vapor mixture, and is particularly suitable for special scenarios such as underwater cable measurement, high-altitude cable measurement, and wire measurement in oil environment.

[0041] Embodiment 2:

[0042] Embodiment 2 provides a method for measuring the length of a wire and cable, based on a length measuring device for a wire and cable 33 in Embodiment 1, the method is as follows:

[0043] First, it is necessary to select an appropriate arc-shaped steel rod 20 according to the outer diameter of the wire and cable 33. For example, if the outer diameter of the wire and cable 33 is 20 cm, the distance between the arc-shaped steel rod 20 and its center is 10 cm, that is, the corresponding radius of the arc-shaped steel rod 20 is 10 cm. The arc-shaped steel rod 20 can be closely attached to the outer surface of the wire and cable 33.

[0044] Then, at the starting point of measurement, three groups of measuring tool strings 1 are evenly distributed in a ring shape on the outer surface of the wire and cable 33, and the tracks 5 of each group of measuring tool strings 1 are all in contact with the outer surface of the wire and cable 33, and each adjacent group of measuring tool strings 1 is hinged by an arc steel rod 20. All the driving vehicles 3 and all the measuring vehicles 2 are equipped with independent power supplies, which can be built in the shell 4 or hung outside the shell 4, and this embodiment does not limit it. Each driving vehicle 3 is provided with a driving circuit control board electrically connected to the motor 31 of the corresponding driving component, and all power supplies are connected to the corresponding driving circuit control board and the corresponding counting circuit control board through wires. All the driving vehicles 3 are started synchronously, so that all the measuring tool strings 1 move along the wire and cable 33 and all the measuring vehicles 2 move synchronously. During the movement of the measuring vehicle 2, the tracks 5 of the measuring vehicle 2 drive the corresponding rotating shaft 8 to rotate, and the rotating shaft 8 drives the wheel body 25 to rotate through the gear transmission group 27, so that the counter 26 counts and sends the count value to the corresponding counting circuit control board. The rotating shaft 8 drives the code disc 30 to rotate through the gear transmission group 27, so that the laser receiver 29 sends the received laser signal to the counting circuit control board.

[0045] If the driving circuit control board detects that the driving vehicle 3 cannot move during driving, the driving circuit control board stops all motors 31 for 3 minutes, and then executes the "obstacle crossing" program. In the "obstacle crossing" program, the driving circuit control board makes all motors 31 reverse synchronously. After all the measuring tool strings 1 travel L distance in the reverse direction, the driving circuit control board makes all motors 31 rotate forward synchronously and increases the torque of the motors 31. If the distance traveled in the forward direction by the measuring tool string 1 is greater than L, the driving circuit control board enters the "normal" program and continues to drive forward. If the distance traveled in the forward direction by the measuring tool string 1 is less than or equal to L and the measuring tool string 1 cannot move, S5 is repeated up to 5 times, and the torque of the motor 31 is gradually increased until the driving circuit control board enters the "normal" program to continue measuring, or the driving circuit control board enters the "return" program to terminate the measurement. The above 3-minute stop time is recognized by all counting circuit control boards, and the counting circuit control board determines the number of times N to execute the "obstacle crossing" program according to the reverse data of the meter wheel counting component and the laser encoder counting component.

[0046] Finally, if the measuring tool string 1 returns to the measuring starting point, the data of each measuring vehicle 2 is a data group, and the data groups of all measuring vehicles 2 are exported to the external calculator. The calculator compares all the data groups, and the data groups with the same data are taken as accurate data. If the deviation between the data of the remaining data groups and the accurate data exceeds 2%, the data group is discarded. If the deviation does not exceed 2%, the data is averaged with the accurate data to obtain the final data. The final data is the total distance S traveled by the measuring tool string 1. The computer calculates the distance according to the formula The distance between the measurement starting point and the obstacle point is obtained, and the measurement is completed; S9, if the measurement tool string 1 arrives at the measurement end point, the data of each measurement vehicle 2 is a data group, and the data groups of all measurement vehicles 2 are exported to an external calculator. The calculator compares all the data groups, and the data groups with the same data are taken as accurate data. If the deviation between the data of the remaining data groups and the accurate data exceeds 2%, the data group is discarded. If the deviation does not exceed 2%, the data is averaged with the accurate data to obtain the final data. The final data is the total distance P traveled by the measurement tool string 1. The computer obtains the length of the wire and cable 33 between the measurement starting point and the measurement end point according to the formula P-NL, and the measurement is completed.

[0047] The length measurement method of the wire and cable 33 of this embodiment solves the problem that the existing conventional wire and cable 33 measurement method is not suitable for live measurement and measurement along the line. If there is no insulating layer on the outer surface of the wire and cable 33, all the track shoes 15 and all the anti-skid pads 14 are made of insulating materials, and the outer shell is also made of insulating materials. If the wires in a corrosive environment are measured, all the track shoes 15, all the anti-skid pads 14 and all the outer shells are made of corrosion-resistant materials. Each set of measuring tool strings 1 is equipped with three driving vehicles 3, and all the measuring tool strings 1 are tightly surrounded by the wire and cable 33 through the elastic expansion joint 21 of the connecting piece. An axial limiting protrusion 35 structure is provided between the arc sleeve 22 and the arc expansion rod 23 of each elastic expansion joint 21, which is used to limit the relative rotation of the arc sleeve 22 and the arc expansion rod 23. The driving vehicle 3 is used as a power to travel and measure along the length direction of the wire and cable 33, which can clear obstacles that are easy to remove on the surface of the cable and wire, and complete the cleaning work of the wire and cable 33 while measuring.

[0048] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A wire and cable length measuring device, characterized in that: The method comprises at least two groups of measuring tool strings (1), each group of measuring tool strings (1) comprises at least one measuring vehicle (2) and at least two traveling vehicles (3), and each measuring vehicle (2) is located between two adjacent traveling vehicles (3); The measuring vehicle (2) and the traveling vehicle (3) both comprise a shell (4) and a crawler track (5); a groove (6) for the crawler track (5) to run is provided below the shell (4); a plurality of parallel supporting rollers (7) are provided along the length direction of the groove (6); both ends of a rotating shaft (8) of each supporting roller (7) extend into an inner cavity (9) of the shell (4) from the side walls on both sides of the groove (6), and each rotating shaft (8) is rotatably sealed and connected to the corresponding side wall; all supporting rollers (7) of each shell (4) are transmission-connected via a crawler track (5); and an anti-skid pad (14) is provided on the outer surface of a chain link of each crawler track (5); The shell (4) of the measuring vehicle (2) of each set of measuring tool strings (1) is hingedly connected to the shell (4) of the adjacent traveling vehicle (3), and the tracks (5) of all the measuring vehicles (2) and the tracks (5) of all the traveling vehicles (3) of each set of measuring tool strings (1) are all attached to the outer surface of the electric wire or cable, and each two adjacent sets of measuring tool strings (1) are detachably connected via a connecting piece, so that all the measuring tool strings (1) are fastened to the outside of the electric wire or cable in a ring shape and the moving direction of all the tracks (5) is consistent with the length direction of the electric wire or cable; A counting circuit control board and at least one counting component are provided in the housing (4) of each measuring vehicle (2), each counting component is drivingly connected to a rotating shaft (8) in the inner cavity (9) of the corresponding housing (4), and each counting component is electrically connected to the corresponding counting circuit control board, and the mechanical energy of the rotating shaft (8) is converted into an electrical signal by the counting component and sent to the counting circuit control board; At least one set of driving components is arranged in the shell (4) of each traveling vehicle (3), and each set of driving components is drivingly connected to a rotating shaft (8) in the inner cavity (9) of the corresponding shell (4). The driving components drive the corresponding rotating shaft (8) and crawler track (5) to rotate, thereby causing all the measuring tool strings (1) to move synchronously along the wires or cables.

2. A wire and cable length measuring device according to claim 1, characterized in that: Each chain link comprises a track shoe (15) and a track pin (16); the track shoes (15) of each two adjacent chain links are hingedly connected by the track pin (16); the outer surface of each track shoe (15) is provided with an anti-skid pad (14); the outer surface of the anti-skid pad (14) is provided with an arc surface adapted to the outer surface of the wire or cable; the inner surface of each track shoe (15) is provided with a track tooth (17); the side surface of each supporting wheel (7) is provided with a tooth groove (18) adapted to the track tooth (17); the height of all track teeth (17) is the same and not less than 2 / 3 of the radius of the supporting wheel (7).

3. A wire and cable length measuring device according to claim 2, characterized in that: A meter wheel counting component and a laser encoder counting component are arranged in the housing (4) of each measuring vehicle (2), and the meter wheel counting component and the laser encoder counting component are electrically connected to corresponding counting circuit control boards respectively; The meter wheel counting assembly comprises a wheel body (25), a counter (26) and a gear transmission group (27); the counter (26) is mounted on the upper part of the inner cavity (9) of the corresponding housing (4); the wheel body (25) is coaxially fixed to the input shaft of the counter (26); and the wheel body (25) is transmission-connected to the corresponding rotating shaft (8) in the housing (4) through the gear transmission group (27), and the input shaft of the counter (26) is driven to rotate through the rotating shaft (8); The laser encoder counting assembly comprises a laser emitter (28), a laser receiver (29), a code disc (30) and a gear transmission group (27); the laser emitter (28) and the laser receiver (29) are both installed on the upper part of the inner cavity (9) of the corresponding shell (4), and the laser emitter (28) and the laser receiver (29) are directly opposite; the code disc (30) is connected to the corresponding rotating shaft (8) in the shell (4) through the gear transmission group (27), and the code disc (30) is located between the laser emitter (28) and the laser receiver (29), and the code disc (30) is driven to rotate through the rotating shaft (8).

4. A wire and cable length measuring device according to claim 3, characterized in that: The driving assembly comprises a motor (31) and a synchronous belt transmission group (32); the motor (31) is installed on the upper part of the corresponding inner cavity (9); the output shaft of the motor (31) is connected to the corresponding rotating shaft (8) in the housing (4) through the synchronous belt transmission group (32), and the corresponding rotating shaft (8) is driven to rotate by the motor (31).

5. The wire and cable length measuring device according to claim 1, characterized in that: The side wall of each groove (6) is provided with a through hole (10) adapted to the corresponding rotating shaft (8), and a rotational sealing connection is formed between the through hole (10) and the rotating shaft (8) via a bearing (11) and at least two sealing rings (12).

6. A wire and cable length measuring device according to claim 5, characterized in that: The side wall of each through hole (10) is provided with an open annular oil chamber (13), and at least one sealing ring (12) is provided on each side of the annular oil chamber (13). The sealing rings (12) on both sides of the annular oil chamber (13) are in contact with the corresponding rotating shaft (8), thereby sealing the opening of the annular oil chamber (13); and each annular oil chamber (13) is provided with pressurized oil.

7. A wire and cable length measuring device according to claim 4, characterized in that: Each housing (4) is provided with hinged arms (19) on both sides, and each hinged arm (19) is bent downward; the hinged arms (19) between each two adjacent housings (4) of each set of measuring tool strings (1) are hinged via a pin; the connecting member is an arc-shaped steel rod (20) adapted to an electric wire or cable, and both ends of each arc-shaped steel rod (20) are hinged to the hinged arms (19) between two adjacent sets of measuring tool strings (1).

8. The wire and cable length measuring device according to claim 7, characterized in that: An elastic telescopic joint (21) is provided in the middle of each arc-shaped steel rod (20); the elastic telescopic joint (21) comprises an arc-shaped sleeve (22), an arc-shaped telescopic rod (23) and a tension spring (24); the tension spring (24) is located in the inner cavity (9) of the arc-shaped sleeve (22); the end of the arc-shaped telescopic rod (23) is slidably sealed in the inner cavity (9) of the arc-shaped sleeve (22), and the two ends of the tension spring (24) are respectively fixedly connected to the bottom wall of the inner cavity (9) and the end of the arc-shaped telescopic rod (23); the head end of the arc-shaped telescopic rod (23) and the outer end of the arc-shaped telescopic rod (23) are respectively fixedly connected to the middle of the arc-shaped steel rod (20); the arc-shaped telescopic rod (23) is pulled back into the arc-shaped sleeve (22) by the tension of the tension spring (24), thereby causing all the arc-shaped steel rods (20) to tighten the measuring tool string (1).

9. The wire and cable length measuring device according to claim 1, characterized in that: Each housing (4) is provided with at least three supporting rollers (7), and the three supporting rollers (7) have the same diameter and are located on the same horizontal plane.

10. A method for measuring the length of a wire or cable, characterized in that: A wire and cable length measuring device according to claim 8, the steps are as follows: S1. Selecting an appropriate arc-shaped steel rod (20) according to the outer diameter of the electric wire and cable (33); S2. At the measurement starting point, 2 to 5 groups of measuring tool strings (1) are evenly distributed in a ring shape on the outer surface of the electric wire and cable (33), the crawler (5) of each group of measuring tool strings (1) is in close contact with the outer surface of the electric wire and cable (33), and each two adjacent groups of measuring tool strings (1) are hingedly connected by an arc-shaped steel rod (20); S3, all the traveling vehicles (3) and all the measuring vehicles (2) are equipped with independent power supplies, each traveling vehicle (3) is provided with a traveling circuit control board electrically connected to the motor (31) of the corresponding driving assembly, all the traveling vehicles (3) are started synchronously, so that all the measuring tool strings (1) move along the electric wires and cables (33) and all the measuring vehicles (2) move synchronously; S4. When the measuring vehicle (2) is moving, the crawler (5) of the measuring vehicle (2) drives the corresponding rotating shaft (8) to rotate, and the rotating shaft (8) drives the wheel body (25) to rotate through the gear transmission group (27), thereby causing the counter (26) to count and send the count value to the corresponding counting circuit control board; the rotating shaft (8) drives the code disk (30) to rotate through the gear transmission group (27), thereby causing the laser receiver (29) to send the received laser signal to the counting circuit control board; S5. If the driving circuit control board detects that the driving vehicle (3) cannot move during driving, the driving circuit control board stops all the motors (31) for 3 minutes, and then executes the "obstacle crossing" program. In the "obstacle crossing" program, the driving circuit control board causes all the motors (31) to rotate in the reverse direction synchronously. After all the measuring tool strings (1) travel a distance L in the reverse direction, the driving circuit control board causes all the motors (31) to rotate forward synchronously and increases the torque of the motors (31); S6, if the distance traveled in the forward direction by the measuring tool string (1) is greater than L, the driving circuit control board enters the "normal" program and continues to drive forward; if the distance traveled in the forward direction by the measuring tool string (1) is less than or equal to L and the measuring tool string (1) cannot move, S5 is repeated for a maximum of 5 times, and the torque of the motor (31) is gradually increased until the driving circuit control board enters the "normal" program and continues to measure, or the driving circuit control board enters the "return" program and terminates the measurement; S7, the 3-minute stop time in S5 is recognized by all counting circuit control boards, and the counting circuit control boards determine the number of times N to execute the "obstacle crossing" program according to the reverse data of the meter wheel counting component and the laser encoder counting component; S8. If the measuring tool string (1) returns to the measuring starting point, the data of each measuring vehicle (2) is a data group. The data groups of all measuring vehicles (2) are exported to an external calculator. The calculator compares all the data groups. The data groups with the same data are taken as accurate data. If the deviation between the data of the remaining data groups and the accurate data exceeds 2%, the data group is discarded. If the deviation does not exceed 2%, the data is averaged with the accurate data to obtain the final data. The final data is the total distance S traveled by the measuring tool string (1). The computer calculates the distance S according to the formula The distance between the measuring starting point and the obstacle point is obtained, and the measurement ends; S9. If the measuring tool string (1) reaches the measuring end point, the data of each measuring vehicle (2) is a data group. The data groups of all measuring vehicles (2) are exported to an external calculator. The calculator compares all the data groups. The data groups with the same data are taken as accurate data. If the deviation between the data of the remaining data groups and the accurate data exceeds 2%, the data group is discarded. If the deviation does not exceed 2%, the data is averaged with the accurate data to obtain the final data. The final data is the total distance P traveled by the measuring tool string (1). The computer obtains the length of the wire and cable (33) between the measuring start point and the measuring end point according to the formula P-NL, and the measurement ends.

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