JP2018112497A - Travel measuring device and method for measuring travel of object to be measured - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travel measuring device and method for measuring the travel of an object to be measured, capable of finely measuring the cable travel of a power transmission cable in a millimeter or centimeter unit on a street without opening a manhole and further automatically measuring it, for example, for each hour.SOLUTION: A travel measuring device for measuring the travel of an object P to be measured comprises: a displacement sensor 1 placed in the vicinity of the long-sized object to be measured P; a sensor wire 2 withdrawn from the displacement sensor 1; and wire fixing means (4 and 5) for fixing an end portion of the sensor wire 2 to the object to be measured P. The sensor wire 2 is arranged in parallel so as to be along the object to be measured P.SELECTED DRAWING: Figure 5

Description

  The present invention relates to, for example, a movement amount measuring apparatus for measuring a movement amount of a measurement object such as a power transmission cable installed in a manhole of an underground conduit, and a movement amount measurement method for measuring the movement amount of the measurement object. It is about.

  In general, for example, a power transmission cable installed in a manhole in a subterranean pipeline has, as its configuration, a portion bundled with copper wires that conduct electricity at the center, and is coated with insulating plastic or the like on the outside. And insulated.

  Such a power transmission cable may move due to temperature, vibration, or the like.

  For example, when the surrounding environmental temperature changes or the temperature changes with a load change caused by power transmission, the power transmission cable moves in the underground pipe due to thermal expansion and contraction of the power transmission cable.

  Incidentally, when a current is passed through the copper wire of the power transmission cable, the copper wire portion generates heat, and the power transmission cable gradually warms at the timing of power transmission and becomes constant at a certain temperature. Therefore, it is difficult to predict the amount of transmission cable movement before power transmission in underground conduits.

  In addition, the power transmission cable laid in the pipeline under the road is subjected to a progressive vibration driving force that is sent in the traveling direction of the vehicle traveling on the road, so that the power transmission cable gradually moves in the traveling direction of the vehicle. The phenomenon of moving may occur. This phenomenon is called a wave riding phenomenon. When such a wave riding phenomenon occurs, slackening occurs on the downstream side of the power transmission cable, but there is a disadvantage that the excess length of the power transmission cable is insufficient on the upstream side.

  As a general countermeasure for the above-mentioned movement phenomenon of the transmission cable, it is possible to absorb the movement of the transmission cable at the design stage when it can be estimated that the transmission cable moves to some extent according to the installation conditions. A simple shock absorber is installed, or a stopper device is installed to prevent the transmission cable from moving.

  As this stopper device, for example, there is a restraint device using a cleat mechanism that stops the movement of the power transmission cable by pressing down a part of the power transmission cable by the elastic force of a spring. However, when the power transmission cable laid in the pipeline has a strong action to move, the movement could not be completely prevented.

  In addition, the connection part connecting the transmission cables is usually in a state where the transmission cable is fixed, but when the transmission cables gradually move toward each other in this connection part, the connection part gradually loosens. When the slackness increases and exceeds a certain limit, a so-called buckling phenomenon occurs in the power transmission cable.

  When such a buckling phenomenon occurs, distortion also occurs in the insulating plastic that covers the copper wire part in order to insulate the transmission cable, and in the worst case, this plastic part is damaged and a ground fault occurs. There is a possibility of an accident.

  On the other hand, if the power transmission cables gradually move toward each other at the connection part and the connected power transmission cable is pulled, the power transmission cable may come off at the connection part, which may cause a disconnection accident. .

  Therefore, monitoring whether the power transmission cable is moving is a very important management item.

  For example, there is a movement detection system disclosed in Patent Document 1 as a monitor for such movement of a power transmission cable. This system is capable of detecting the amount of movement of the power transmission cable and confirming the detection result of the amount of movement of the power transmission cable without an operator entering the manhole.

  Specifically, a detection plate is attached to the outer peripheral surface of the power transmission cable via a clamp ring, and the first to third sensors are disposed on the left side of the detection plate. When the power transmission cable moves in the left direction, the first to third contacts of each sensor are sequentially pushed by the detection plate, and the amount of movement of the power transmission cable is detected in two stages based on the number of these ON states. It is.

  Further, in Patent Document 1, when a plurality of contact-type sensors are arranged at predetermined positions in a manhole and the power transmission cable moves in the longitudinal direction, the detected object sequentially contacts the contacts of the plurality of sensors. It is configured as follows. Thus, the movement amount of the power transmission cable is detected by each sensor arrangement pitch.

  Furthermore, information on the amount of movement of the power transmission cable detected by each sensor is sent from the sensor body to the monitoring device via a signal line, and is transmitted as a radio signal from the monitoring device to the information display device on the ground side. Yes.

  In addition, there is a wave riding phenomenon prediction system and a prediction method that predict the amount of cable movement due to the wave riding phenomenon as shown in Patent Document 2 and warn when a certain threshold is exceeded.

  Specifically, the monitoring server divides the prediction target area to form a plurality of prediction target areas or the like in which at least one detection means is installed, and the like, a pipeline information, traffic information, a cable Basic data storage means with information, work data storage means with timing information on cable installation work or cable movement correction work, elapsed time, pipeline information, traffic derived from the timing information Information, the relationship between cable information and cable movement amount as a function, and the movement amount estimation that estimates the cable movement amount estimation value for each cable from the function value obtained by the function and the cable movement amount detection value detected by the detection means And a monitoring warning means for monitoring the estimated cable movement amount and issuing a warning when a certain threshold value is exceeded.

JP 2010-93936 A JP 2012-23941 A

  As described above, since the monitoring of the movement of the power transmission cable is a very important management item, it is indispensable to continuously check the movement of the cable.

  And, for example, in order to confirm the movement amount and offset (bend) of the power transmission cable and the presence or absence of thermal expansion / contraction of the power transmission cable, conventionally, confirmation with opening of the manhole once every three to three months We were carrying out work.

  However, the conventional confirmation work that involves opening a manhole or the like has a problem in terms of cost because it requires a large amount of money.

  In terms of work, enormous work is required for the procedure for commissioning inspections. Further, in order to confirm the correlation between the temperature and the movement amount, a new measurement method such as automatic measurement every hour is required. If the movement measurement work is performed by the conventional method, the time and labor consumed are extremely large.

  In addition, in the movement detection system of the power transmission cable in the manhole shown in Patent Document 1 described above, measurement data of the amount of cable movement can be collected from the road without opening the manhole or the like. Since the amount of movement of the power transmission cable is detected by the arrangement pitch of each sensor, it is a fine numerical value of the amount of cable movement, for example, millimeters or centimeters. In units, it is virtually impossible to measure.

  In addition, the surfing phenomenon prediction system and the prediction method shown in Patent Document 2 described above do not disclose anything regarding the specific arrangement and configuration of sensors that are means for detecting the amount of cable movement.

  Therefore, the present invention was created in view of the existing circumstances as described above, and the amount of movement of the power transmission cable is finely measured in units of millimeters or centimeters on the road without opening a manhole, for example, It is an object of the present invention to provide a movement amount measuring apparatus that measures the movement amount of a measurement object and a movement amount measurement method that measures the movement amount of the measurement object that can be automatically measured every hour.

  In addition, it can be installed on a power transmission cable with a simple configuration and at low cost without causing any adverse effects on each facility in the manhole, and displacement measurement data can be recorded on the sensor side, for example, recording data (hourly data) It is an object of the present invention to provide a movement amount measuring apparatus and a movement amount measuring method that can be collectively stored as one year worth).

  In addition, the displacement measurement data stored in batch on the sensor side can be easily received from external devices, and it is also excellent in waterproofing, and it is easy to secure the power supply inside the manhole for supplying power to the sensor side. It is an object of the present invention to provide a movement amount measuring apparatus and a movement amount measuring method.

  The invention of claim 1 according to the present invention is a movement amount measuring device that is attached to a long measurement object P and measures the movement amount of the measurement object P, and is installed in the vicinity of the long measurement object P. Displacement sensor 1, sensor wire 2 pulled out from displacement sensor 1, and wire fixing means (4, 5) for fixing the end of sensor wire 2 to measurement object P, and measuring sensor wire 2 By arranging in parallel along the object P, the above-described problems were solved.

  According to the movement amount measuring apparatus for measuring the movement amount of the measurement object P according to the first aspect, the displacement sensor 1 installed in the vicinity of the long measurement object P and the sensor wire drawn from the displacement sensor 1 2 and wire fixing means (4, 5) for fixing the end of the sensor wire 2 to the measuring object P, for example, each of the power transmission cables installed in the manhole of the underground conduit The movement amount measuring device can be easily installed on the power transmission cable without any adverse effect on the equipment.

  Further, since the sensor wires 2 are arranged in parallel along the measurement object P, the amount of movement of the cable such as a power transmission cable is finely measured in millimeters or centimeters as the measurement object P, for example. For example, it can be automatically and accurately measured every hour.

  According to the second aspect of the present invention, in order to arrange the sensor wire 2 along the measurement object P in parallel, the installation position of the displacement sensor 1 and the sensor by the wire fixing means (4, 5). By making the fixing position of the wire 2 adjustable, the above-described problem has been solved.

  According to the movement amount measuring apparatus for measuring the movement amount of the measurement object P according to claim 2, the installation position of the displacement sensor 1 and the fixing position of the sensor wire 2 by the wire fixing means (4, 5) are adjusted. Thus, the sensor wire 2 can be arranged in parallel along the measurement object P by a simple operation.

  Further, according to a third aspect of the present invention, the displacement sensor 1 includes a pulley 3, and the sensor wire 2 is pulled out from the displacement sensor 1 through the pulley 3 in a predetermined direction, and the wire fixing means (4, The problem mentioned above was solved similarly by fixing the edge part of the sensor wire 2 to the measurement object P by 5), and arrange | positioning the sensor wire 2 along the measurement object P in parallel.

  According to the movement amount measuring apparatus for measuring the movement amount of the measuring object P according to the third aspect, the sensor wire 2 is pulled out from the displacement sensor 1 in a predetermined direction via the pulley 3 of the displacement sensor 1, and wire fixing means is provided. By the operation of fixing the end of the sensor wire 2 to the measurement object P by (4, 5), the sensor wire 2 can be arranged in parallel along the measurement object P.

  Furthermore, the invention of claim 4 according to the present invention is characterized in that the wire fixing means (4, 5) includes a substantially L-shaped wire mounting bracket 5 having one end connected to the end of the sensor wire 2, and a wire mounting bracket 5. Similarly, the above-described problem has been solved by including the fastening band 4 that fixes the other end of the measurement object P to a predetermined position of the measurement object P.

  According to the movement amount measuring apparatus for measuring the movement amount of the measurement object P according to the fourth aspect, the other end of the substantially L-shaped wire mounting bracket 5 to which the end portion of the sensor wire 2 is connected is connected to the fastening band 4. Therefore, the sensor wire 2 can be arranged in parallel along the measurement object P because the position is adjusted to a predetermined position of the measurement object P while adjusting the position.

  Furthermore, the invention of Claim 5 which concerns on this invention solved the subject mentioned above similarly because the said wire attachment metal fitting 5 affixed the anti-slip | skid on the surface contact | abutted to the measuring object P. FIG.

  According to the movement amount measuring apparatus for measuring the movement amount of the measurement object P according to the fifth aspect, since the anti-slip is attached to the surface in contact with the measurement object P, the wire is connected via the fastening band 4. When a part of the mounting bracket 5 is tightened and firmly pressed against the measurement object P and fixed, it is possible to reliably prevent the occurrence of a situation in which the fixing position shifts.

  Moreover, when the measurement object P is a power transmission cable, even if the hardness of the insulation sheath (sheath) changes, it is possible to reliably prevent the occurrence of a situation in which the fixing position is shifted.

  Further, the invention of claim 6 according to the present invention solves the above-described problem by the fact that the measurement object P is a power transmission cable installed in a manhole.

  According to the movement amount measuring apparatus for measuring the movement amount of the measurement object P according to claim 6, the cable movement amount that occurs due to thermal expansion and contraction, wave riding phenomenon, etc., for the power transmission cable installed in the manhole, It can be measured accurately in units of millimeters or centimeters and, for example, automatically every hour.

  In addition, the invention of claim 7 according to the present invention is a moving amount measuring method for measuring the moving amount of the measuring object P attached to the long measuring object P, and measuring the displacement sensor 1 with a long measurement. The sensor wire 2 is pulled out from the displacement sensor 1 in a predetermined direction via the step of installing in the vicinity of the object P and the pulley 3 provided in the displacement sensor 1, and the end of the sensor wire 2 is used as the measurement object P. In the step of fixing, the sensor wire 2 is arranged in parallel so as to be along the measurement object P, thereby solving the above-described problem.

  According to the movement amount measuring method for measuring the movement amount of the measurement object P according to the seventh aspect, since the sensor wire 2 is arranged in parallel along the measurement object P, as the measurement object P, For example, the amount of movement of a cable such as a power transmission cable can be measured finely in units of millimeters or centimeters and, for example, automatically and accurately every hour.

  According to the eighth aspect of the present invention, in order to arrange the sensor wire 2 along the measurement object P in parallel, the installation position of the displacement sensor 1 and the sensor by the wire fixing means (4, 5). By making the fixing position of the wire 2 adjustable, the above-described problem has been solved.

  According to the movement amount measuring method for measuring the movement amount of the measurement object P according to the eighth aspect, the installation position of the displacement sensor 1 and the fixing position of the sensor wire 2 by the wire fixing means (4, 5) are adjusted. With the simple operation, the sensor wire 2 can be reliably arranged in parallel along the measurement object P.

  According to the present invention, the amount of movement of the power transmission cable can be finely measured in units of millimeters or centimeters on the road without opening a manhole, and for example, can be automatically measured every hour.

  In addition, it can be installed on a power transmission cable with a simple configuration and at low cost without causing any adverse effects on each facility in the manhole, and displacement measurement data can be recorded on the sensor side, for example, recording data (hourly data) It can be saved in a lump as equivalent to one year).

  In addition, displacement measurement data saved on the sensor side can be easily received from an external device, and it has excellent waterproof properties, and it is easy to secure a power supply inside the manhole for supplying power to the sensor side. Can

It is a block diagram which shows the outline of the system of a moving amount measuring device. It is a perspective view which shows the outline | summary of each apparatus which comprises a movement amount measuring device. It is a side view which shows the periphery of the connection part of the power transmission cable in a manhole, and the pipe opening of a cable restraint metal fitting. It is a perspective view which shows the state which has installed the displacement sensor in the pipe opening of the cable restraint metal fitting of a power transmission cable, and has arrange | positioned in parallel along the power transmission cable the sensor wire pulled out from the displacement sensor. It is the perspective view which looked at the state which installed the displacement sensor in the pipe opening of the cable restraint metal fitting of a power transmission cable, and has arrange | positioned in parallel so that the sensor wire pulled out from the displacement sensor may be along a power transmission cable. It is a disassembled perspective view which shows the structure of the displacement sensor installed in the pipe opening of the cable restraint metal fitting of a power transmission cable. It is a perspective view which shows the state which has installed the displacement sensor in the pipe port of the cable restraint metal fitting of a power transmission cable. The structure of a wire attachment metal fitting is shown, (a) is the perspective view seen from diagonally upward direction, (b) is the perspective view seen from diagonally downward. The structure of a wire attachment metal fitting is shown, (a) is a bottom view, (b) is a front view, (c) is a side view. It is a perspective view which shows the state which has attached the power supply to the power transmission cable. It is the perspective view which looked at the state which attached the power supply to the power transmission cable from another direction. The structure of a power supply is shown, (a) is a top view, (b) is a front view, (c) is a side view. It is a side view which shows the periphery of the connection part of the power transmission cable in a manhole, and the pipe opening of a cable restraint metal fitting. It is a perspective view which shows the state which has installed the displacement sensor in the pipe opening of the cable restraint metal fitting of a power transmission cable, and has arrange | positioned in parallel along the power transmission cable the sensor wire pulled out from the displacement sensor. It is the perspective view which looked at the state which installed the displacement sensor in the pipe opening of the cable restraint metal fitting of a power transmission cable, and has arrange | positioned in parallel so that the sensor wire pulled out from the displacement sensor may be along a power transmission cable. It is a disassembled perspective view which shows the structure of the displacement sensor installed in the pipe opening of the cable restraint metal fitting of a power transmission cable. It is a perspective view which shows the state which has installed the displacement sensor in the pipe port of the cable restraint metal fitting of a power transmission cable. It is a perspective view which shows the state which has installed the displacement sensor in the cleat side of the power transmission cable, and has arrange | positioned the sensor wire pulled out from the displacement sensor along the power transmission cable in parallel. It is the perspective view which looked at the state which installed the displacement sensor in the cleat side of the power transmission cable, and has arrange | positioned the sensor wire pulled out from the displacement sensor in parallel along a power transmission cable from another direction. It is a disassembled perspective view which shows the structure of the displacement sensor installed in the cleat side of a power transmission cable. It is a perspective view which shows the state which has installed the displacement sensor in the cleat side of the power transmission cable.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(Configuration of travel measurement device)
As shown in FIGS. 4 and 5, the movement amount measuring device for measuring the movement amount of the measurement object P according to the present invention is a displacement sensor for measuring a cable movement amount that is attached in the vicinity of a long measurement object P. 1, a sensor wire 2 drawn from the displacement sensor 1, and wire fixing means (4, 5) for fixing the end of the sensor wire 2 to the measurement object P.

  4 and FIG. 5, a pulley 3 is attached to the displacement sensor 1, and the sensor wire 2 is moved from the displacement sensor 1 through the pulley 3 in a predetermined direction, that is, the sensor wire 2. Is pulled out in the direction along the long measurement object P, the end of the sensor wire 2 is fixed to the measurement object P by the wire fixing means (4, 5), and the sensor wire 2 is along the measurement object P. Are arranged in parallel.

  Thus, in order to arrange the sensor wires 2 in parallel along the measurement object P, the displacement sensor 1 is first fixed in the vicinity of the measurement object P, and the wire fixing means (4, 5) are interposed. The fixed position of the sensor wire 2 is adjusted.

(Displacement sensor)
As the displacement sensor 1, for example, a compact type wire displacement meter equipped with a precision potentiometer is used, and the amount of movement of the measurement object P is made to correspond to the expansion and contraction of the sensor wire 2.

  As shown in FIG. 1, the displacement sensor 1 is connected to a wireless measuring unit 6 having a wireless transmitter 6A. The wireless measuring unit 6 is wirelessly connected to a personal computer on the ground via the wireless transmitter 6A. It is assumed that measurement conditions are set and transmission of recording data is performed toward the wireless receiver 9A installed in 9, and the displacement measurement data obtained by the displacement sensor 1 is recorded by the wireless measurement unit 6, for example, for every hour of recording data ( 1 year equivalent) can be saved in a batch.

  As shown in FIGS. 1 and 2, the wireless measuring unit 6 is connected to a power source body 8 including a power source 7 so as to supply power to the displacement sensor 1. Electric power can be always supplied.

(Sensor support mechanism)
The displacement sensor 1 includes a sensor support mechanism 51 that is mounted in the vicinity of the measurement object P. That is, as shown in FIGS. 4 to 7, the sensor support mechanism 51 is sandwiched in the vicinity of the measurement object P as a vise and fastened and fixed with the bolts V. 22, an L-shaped support base 23 that is attached to one side of the tension fixing member 22 so as to be slidable in the front-rear direction, and a vertical direction (measurement) on the other end side of the L-shaped support stand 23 And a substantially triangular plate-like bearing plate 24 that is mounted so as to be slidable in the direction along the object P). Further, a cylindrical spacer S constituting the pulley 3 is attached to a triangular vertex of the bearing plate 24 by a screw W and a nut N so as to be rotatable.

  When adjusting the installation position of the displacement sensor 1 in order to arrange the sensor wire 2 in parallel along the measurement object P, first, the bolt V that fixes the tension fixing member 22 is first loosened. The tension fixing member 22 is slid along either the left or right side along the recess 21A. Then, the bolt V is tightened and fixed at a preferable position where the sensor wire 2 is pulled out along the longitudinal direction of the measurement object P.

(Wire fixing means)
As shown in FIGS. 8 and 9, the wire fixing means (4, 5) includes a substantially L-shaped wire mounting bracket 5 and a flexible band plate-like fastening band 4. A cylindrical wire attachment hole 11 to which the end of the sensor wire 2 drawn out from the displacement sensor 1 is fixed is provided on the inner surface of the L-shaped end that stands upright of the wire attachment 5. ing.

  Then, in a state where the other end side of the L-shape of the wire mounting bracket 5 is brought into contact with a side surface at a predetermined position of the measurement object P so that the sensor wire 2 is arranged in parallel along the measurement object P. The other end side of the L-shape is fastened by the fastening band 4 via the fastening band 4 and is firmly pressed and fixed to the measurement object P.

  A non-slip paper file 10 such as coarse sandpaper is attached to the outer surface of the other end of the L-shape, which is fastened and fixed by the fastening band 4, via a double-sided adhesive fastener or the like. The slip stopper may be a rubber sheet or the like.

  Next, a movement amount measurement method for measuring the movement amount of the measurement object P using the displacement sensor 1 according to the present embodiment will be described.

  First, the displacement sensor 1 is installed in the vicinity of the long measurement object P by the sensor support mechanism 51 described above.

  Next, the sensor wire 2 is pulled out from the displacement sensor 1 in a predetermined direction through the pulley 3 provided in the displacement sensor 1, the end of the sensor wire 2 is attached to the wire attachment hole 11, and the fastening band 4 is used. Then, the other end side of the wire fitting 5 is fastened by the fastening band 4 and firmly pressed against the measurement object P to be fixed.

In order to arrange the sensor wire 2 along the measurement object P in parallel, either the installation position of the displacement sensor 1 or the fixing position of the sensor wire 2 by the wire fixing means (4, 5) is used. This is done by adjusting the position or adjusting both positions simultaneously.
(Overall configuration of travel measurement system)
Next, the entire configuration of the movement amount measurement system for measuring the movement amount of the measurement object P according to the present invention will be described in detail.

  As shown in FIGS. 1 and 2, this system is connected to the displacement sensor 1 for measuring the amount of cable movement and the displacement sensor 1 having the above-described configuration, and is connected to the personal computer 9 by, for example, a USB or the like. A wireless measuring unit 6 equipped with a wireless transmitter 6A capable of transmitting and receiving with the receiver 9A, a power source body 8 connected to the wireless measuring unit 6 by a DC power cable, and a connector connected to the power source body 8, for example, a clamp type The system configuration includes one or a plurality (two, etc.) of power sources 7 such as a DC power source.

  In the following description, the power transmission cable in the manhole MH will be described as the measurement object P.

(Details of wireless measurement unit)
The wireless measuring unit 6 is connected to a wireless transmitter 6A with a specific low power wireless having a frequency of, for example, 429 MHz, and records displacement measurement data from, for example, four displacement sensors 1, for example, every hour. Data can be saved as a batch (equivalent to one year).

  Furthermore, by setting the wireless transmitter 6A at, for example, the upper part (in the vicinity of the scaffolding) in the manhole MH, communication with the outside is ensured, and thus the wireless measuring unit 6 reads and records, for example, 1 Periodic displacement measurement data, measurement condition setting data, etc. are installed (possessed) on the road near the manhole MH via the radio transmitter 6A, for example, periodically on the personal computer 9 side equipped with the radio receiver 9A. It is intended to be transmitted to.

(Displacement sensor details)
As shown in FIGS. 4 and 5, as described above, as the displacement sensor 1, a compact type wire displacement meter equipped with a precision potentiometer is used, and the amount of movement of the power transmission cable P corresponds to the expansion and contraction of the sensor wire 2. I am letting. As shown in FIG. 3, two power transmission cables P are laid inside a manhole MH arranged in the basement, and the above-mentioned in order to individually detect the amount of movement of each power transmission cable P. The displacement sensor 1 is attached in the vicinity of the power transmission cable P.

  That is, as shown in FIGS. 3, 13, and 19, the displacement sensor 1 is provided on the wall surface of a pipe entrance (hereinafter referred to as a pipe opening) of a manhole MH in which a cable connection portion KS is arranged in the middle. For example, the cable restraint fitting 21 (see FIG. 3) on the “MH pipe port A side”, the support metal 31 (see FIG. 13) on the “MH pipe port B side”, and further on the outside of the pipe port in the manhole MH. There are three sensor installation forms that are attached to the “additional cleat C side” cleat mount 41 (see FIGS. 3, 13, and 19) by the stopper (restraint) device 40, and the direction in which the sensor is pulled into the pipeline. The amount of movement of the power transmission cable P that is pulled and moved is detected.

  As shown in FIGS. 4 and 5, each displacement sensor 1 is provided with a sensor support mechanism 51 having a dedicated configuration, and each sensor support mechanism 51 includes a pulley 3. The sensor wire 2 is pulled out from the displacement sensor 1 through the pulley 3 in a predetermined direction, and the end of the sensor wire 2 is fixed at a predetermined position of the power transmission cable P by the wire fixing means (4, 5).

  A more detailed configuration of the sensor support mechanism 51 will be described later (see FIGS. 6, 7, 14 to 21, etc.).

(Sensor wire twist correction)
In order to accurately measure the amount of movement of the power transmission cable P due to thermal expansion and contraction in units of millimeters or centimeters, it is necessary to arrange the power transmission cable P and the sensor wire 2 drawn from the displacement sensor 1 in parallel. .

  For this reason, the displacement sensor 1 is installed on the cable restraint fitting 21 on the “MH pipe port A side”, the support metal 31 on the “MH pipe port B side”, and the cleat mount 41 on the “additional cleat C side”. The twisted state of the sensor wire 2 extending along the longitudinal direction of the power transmission cable P is corrected by adjusting the position or the mounting position of the wire mounting bracket 5.

(Power supply details)
As shown in FIGS. 10 to 12, the power source 7 obtains power from the load current of the power transmission cable P, and is disposed so as to surround the existing power transmission cable P, for example, a waterproof clamp ring structure The electromagnetic induction type power source by is used. That is, the power source 7 has a pair of semicircular rings 7A and 7B that are connected to each other through a waterproof cylindrical cap 7D to form a ring shape. A hinge portion 7C connected by a bolt 7E is provided, and the other end sides of the pair of semicircular rings 7A and 7B are opened via the hinge portion 7C.

  When the pair of semicircular rings 7A and 7B are closed, the outer circumferences of the semicircular rings 7A and 7B are wound around the fastening band 7F to be tied and fixed. Thus, secondary current (alternating current) is generated in the power source 7 by electromagnetic induction of the transmission current flowing through the power transmission cable P, which is converted into direct current, and used for measuring devices such as the displacement sensor 1, the wireless measuring unit 6, and the power source body 8. The power is output. For example, a power supply of about 1 watt can be stably supplied at a load current of 60 amperes.

(Wireless receiver details)
The wireless receiver 9A is connected to the USB port of the personal computer 9 and transmits / receives data to / from the wireless transmitter 6A in the manhole. Communication is performed by command input of the personal computer 9 using communication terminal software.

  The personal computer 9 stores a spreadsheet sheet template for converting the measured value of the cable movement amount by the displacement sensor 1 into a movement amount in millimeters.

  Next, details of a method of attaching the displacement sensor 1 in the vicinity of the power transmission cable P in the above-described movement amount measurement system will be described.

(Details of mounting displacement sensor to MH port A side)
First, the attachment of the displacement sensor 1 to the tube port of the cable restraint fitting 21 on the “MH tube port A side” will be described in detail with reference to FIGS. 6 and 7.

  As shown in FIGS. 6 and 7, the sensor support mechanism 51 is clamped and fixed with bolts V in a vise-like manner on the flange-like port side of the cable restraint fitting 21 on the “MH port A side”. A substantially U-shaped tension fixing member 22, and an L-shaped frame-like shape that is slidably adjustable on one side of the tension fixing member 22 in a front-rear direction (a direction toward or away from the power transmission cable P). A support frame 23, a substantially triangular plate-like bearing plate 24 that is slidably adjustable in the vertical direction (the direction along the power transmission cable P) on the L-shaped other end side (standing surface side) of the support frame 23, and a bearing A pulley 3 on which a cylindrical spacer S is rotatably attached by screws W and nuts N at the triangular apex of the plate 24 is provided.

  The sensor wire 2 is pulled out from the displacement sensor 1 in a predetermined direction via the pulley 3, and the end of the sensor wire 2 is fixed at a predetermined position of the power transmission cable P by the wire fixing means (4, 5).

  As shown in FIG. 6, an arcuate recess 21 </ b> A is formed on the annular flat portion on the flange-like tube port side of the cable restraint fitting 21, and two bolts V for fixing are connected to the recess. The tension fixing member 22 is fixed by dropping into 21A.

  At this time, in order to arrange the sensor wire 2 along the measurement object P in parallel, either the installation position of the displacement sensor 1 or the fixing position of the sensor wire 2 by the wire fixing means (4, 5) is used. This is done by adjusting the positions of the two or by simultaneously adjusting the positions of the two.

  When adjusting the installation position of the displacement sensor 1, the bolt V fixing the tension fixing member 22 is once loosened, and the tension fixing member 22 is slid to the left or right side along the recess 21A to transmit power. After the sensor wires 2 extending along the longitudinal direction of the cable P are put in a parallel state, the bolts V are tightened and fixed again.

  When changing the mounting position of the wire mounting bracket 5, the fastening band 4 is once loosened, and then the wire mounting bracket 5 is shifted to a predetermined position so that the sensor wires 2 that extend along the longitudinal direction of the power transmission cable P are in a parallel state. Then, the fastening band 4 is tightened and fixed again.

  As shown in FIG. 6, a bolt V for fixing the support base 23 to the tension fixing member 22 is inserted into one side of the L-shape of the support base 23 (the surface contacting the tension fixing member 22). A pair of long holes 23A is provided, and the position of the support base 23 is slid through the long holes 23A so that the protrusion can be adjusted.

  On the other end side (standing surface side) of the L-shape of the support gantry 23 is provided with a pair of elongated holes 23B that are shifted from each other and into which bolts V for fixing the bearing plate 24 are inserted. By sliding the position 24, it is possible to adjust the slide in the vertical direction (direction along the power transmission cable P).

(Details of mounting displacement sensor to MH port B side)
Next, attachment of the displacement sensor 1 to the pipe port of the support metal 31 on the “MH pipe port B side” will be described in detail with reference to FIGS. 13 to 17.

  On the flange-shaped annular flat portion of the cable restraint fitting 21 on the “MH pipe port B side”, three bar screws 32 are implanted at an angle of 120 °. Thus, on the annular flat portion of the donut-shaped support metal 31, three through holes 33 having an arc shape every 120 ° are formed.

  Each of the bar screws 32 is inserted into the through-hole 33, and the support metal 31 is fixed to the cable restraint fitting 21 as a three-point support so that the through-hole 33 is sandwiched between a pair of nuts N screwed into the bar screw 32. ing.

  The displacement sensor 1 is fixed to the support metal 31 by a sensor support mechanism 51. In this case, the sensor support mechanism 51 includes a support metal 31 sandwiched between a pair of L-shaped support plates 34 and 35 instead of the support base 23 and is fixed with bolts V and nuts N. The displacement sensor 1 is fixed with four screws W on one support plate 34 (the side facing the wire mounting bracket 5), and the bearing plate 24 provided with the pulley 3 is provided on the other support plate 35. It is attached with bolts V and nuts N.

  The protruding distance of the bearing plate 24 can be adjusted by sliding the position of the support plate 35 through a pair of long holes 35A formed in the support plate 35. Further, since the bearing plate 24 is disposed between the cable restraint fitting 21 and the support metal 31, the sensor wire 2 drawn out from the displacement sensor 1 is passed through the central opening 31A of the support metal 31. , Connected to the wire mounting bracket 5.

  When adjusting the installation position of the displacement sensor 1, the pair of nuts N screwed into the bar screws 32 are once loosened and the support hardware 31 is slid to the left or right side along the through-hole 33 to The sensor wire 2 extending along the longitudinal direction is put in a parallel state, and the nut N is tightened again to fix the support metal 31.

  Next, attachment of the displacement sensor 1 to the “additional cleat C side” will be described in detail with reference to FIGS.

  The cleat mount 41 is composed of angle members 41A and 41B that intersect vertically and horizontally, and the sensor wire 2 is wired inside the cleat mount 41. As the sensor support mechanism 51, the displacement sensor 1 is fixed to the upper surface of the sensor mount 42 with screws W, and the sensor mount 42 is fixed to the lateral angle member 41 </ b> A with a pair of left and right hanging brackets 43. On the vertically oriented angle member 41B, a substantially rectangular thin plate-like slide adjustment plate 44 is placed along a pair of left and right bar screws 46 that are spanned between a pair of upper and lower suspension brackets 45 so as to be positioned substantially directly above the displacement sensor 1. It can be slid in the vertical direction.

  That is, as shown in FIG. 21, a pair of left and right horizontally elongated holes 44A are formed at one end of the slide adjustment plate 44, and the bar screws 46 are inserted into the elongated holes 44A. The upper hanging metal fitting 45 is sandwiched and fixed by a pair of nuts N inserted into the hanging metal fitting 45 and screwed into the bar screw 46.

  On the other hand, the lower end of the bar screw 46 is passed through the long hole 44A of the slide adjusting plate 44 and then inserted into the lower hanging bracket 45, and the lower hanging bracket 45 and the pair of nuts N screwed into the rod screw 46 and The slide adjustment plate 44 is fixed so as to be sandwiched.

  At the other end of the slide adjusting plate 44, three elongated holes 44B extending in the vertical direction are arranged side by side, and a substantially triangular plate provided with the pulley 3 described above through two of the elongated holes 44B. A shaped bearing plate 24 is fixed with screws W and nuts N.

  When correcting the protruding distance of the sensor wire 2, the two long holes 44B of the three long holes 44B of the slide adjusting plate 44 are appropriately changed (reselected), and the bearing plate 24 is replaced with the screw W and the nut. N is fixed.

  In order to correct the twist of the sensor wire 2, the pair of nuts N sandwiching the lower suspension fitting 45 and the slide adjustment plate 44 are once loosened so that the slide adjustment plate 44 is separated from each other. Then, the sensor wire 2 extending along the longitudinal direction of the power transmission cable P is placed in a parallel state, and the nut N is tightened and fixed again.

(Transmission processing of movement amount measurement data of power transmission cable P)
Next, a transmission processing method of movement amount measurement data of the power transmission cable P using the displacement sensor 1 in the movement amount measurement system of the present embodiment will be described.

  When the power transmission cable P continuously moves in the manhole MH due to thermal expansion and contraction or the like, the sensor wire 2 is pulled into or pulled out from the displacement sensor 1 following this, and the amount of movement of the cable is determined by the displacement measurement data. Is recorded in the wireless measurement unit 6.

  The wireless measurement unit 6 collectively stores the displacement measurement data obtained by the displacement sensor 1 as, for example, hourly recording data. An operator sends an arbitrary request signal (command input signal) for obtaining displacement measurement data from the personal computer 9 equipped with the wireless receiver 9A on the road near the manhole MH via the wireless receiver 9A. It transmits toward the radio transmitter 6A of the radio measurement unit 6 in the MH.

  Thereby, the wireless measuring unit 6 transmits, for example, hourly displacement measurement data and measurement condition setting data, which are read and recorded, to the wireless receiver 9A on the personal computer 9 side.

  The data may be periodically and automatically transmitted from the wireless measuring unit 6 to the personal computer 9 side.

  In this way, the amount of movement of the power transmission cable P on the road can be obtained in units of millimeters or centimeters, and for example, can be acquired as batch data every hour. Further, the displacement measurement data acquired by the personal computer 9 is converted into a cable movement amount in millimeters based on a spreadsheet sheet template.

  Displacement measurement data can be stored in the wireless measurement unit 6 at a time, for example, one year worth of recorded data every hour, and this recorded data can be obtained by the personal computer 9 whenever necessary. Can do.

  Although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the gist thereof.

  The present invention is widely used at various work sites as an apparatus / method for detecting the amount of movement of various long articles other than power transmission cables as the measurement object P.

P: Measurement object (power transmission cable)
MH ... Manhole KS ... Cable connection V ... Bolt N ... Nut W ... Screw S ... Spacer 1 ... Displacement sensor 2 ... Sensor wire 3 ... Pulley 4 ... Fastening band (wire fixing means)
5 ... Wire mounting bracket (wire fixing means)
6 ... Wireless measuring unit 6A ... Wireless transmitter 7 ... Power supply 7A ... Semicircle ring 7B ... Semicircle ring
7C ... Hinge part 7D ... Cylindrical cap 7E ... Hinge bolt 7F ... Fastening band 8 ... Power supply body 9 ... Personal computer 9A ... Wireless receiver 10 ... Non-slip paper file 11 ... Wire attachment hole 21 ... Cable restraint bracket 21A ... Recessed portion 22 ... Stretch fixing member 23 ... Support base 23A ... Long hole 23B ... Long hole 24 ... Bearing plate 31 ... Support metal 31A ... Central opening 32 ... Bar screw 33 ... Through hole 34 ... Support plate 35 ... Support plate 35A ... Long hole 40: Stopper (restraint) device 41 ... Cleat mount 41A ... Angle material 41B ... Angle material 42 ... Sensor mount 43 ... Suspension bracket 44 ... Slide adjustment plate 44A ... Long hole 44B ... Long hole 45 ... Suspension bracket 46 ... Bar screw 51. Sensor support mechanism

Claims (8)

  A moving amount measuring device that is attached to a long measuring object and measures the moving amount of the measuring object, a displacement sensor installed in the vicinity of the long measuring object, a sensor wire drawn from the displacement sensor, And a wire fixing means for fixing the end of the sensor wire to the measurement object, wherein the sensor wire is arranged in parallel along the measurement object. Movement amount measuring device to measure.   The measurement object according to claim 1, wherein the sensor wire can be arranged in parallel along the measurement object, and the installation position of the displacement sensor and the fixing position of the sensor wire by the wire fixing means can be adjusted. A moving amount measuring device that measures the moving amount.   The displacement sensor includes a pulley, a sensor wire is pulled out from the displacement sensor in a predetermined direction via the pulley, the end of the sensor wire is fixed to the measurement object by the wire fixing means, and the sensor wire is attached to the measurement object. The movement amount measuring device for measuring the movement amount of the measurement object according to claim 1 or 2, which is arranged in parallel so as to be along.   The wire fixing means includes a substantially L-shaped wire mounting bracket having one end connected to the end of a sensor wire, and a fastening band for fixing the other end of the wire mounting bracket to a predetermined position of the measurement object. The movement amount measuring device according to any one of 1 to 3, which measures a movement amount of a measurement object.   The movement amount measuring apparatus for measuring the movement amount of the measurement object according to claim 4, wherein the wire mounting bracket has a non-slip attached to a surface that contacts the measurement object.   The movement amount measuring apparatus for measuring a movement amount of a measurement object according to claim 1, wherein the measurement object is a power transmission cable installed in a manhole.   It is a movement amount measuring method that is attached to a long measurement object and measures the movement amount of the measurement object, a step of installing a displacement sensor in the vicinity of the long measurement object, and a pulley provided with the displacement sensor In the step of drawing the sensor wire from the displacement sensor in a predetermined direction and fixing the end of the sensor wire to the measurement object, the sensor wire is arranged in parallel along the measurement object. A moving amount measuring method for measuring a moving amount of a measurement object.   8. The measurement object according to claim 7, wherein the sensor wire can be arranged in parallel along the measurement object, and the installation position of the displacement sensor and the fixing position of the sensor wire by the wire fixing means can be adjusted. A moving amount measuring method for measuring a moving amount.

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