JP2017090359A - Attachment, Flexible Sensor and Arrangement Method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely and easily conduct works for arranging a sensor cable in a state having a measurement object surrounded.SOLUTION: An attachment is configured to: be attachable/detachable between both end parts in a flexible sensor cable 2 of a flexible sensor 1 having the sensor cable 2 detecting a physical quantity of a measurement object provided in a state arranged so as to surround the measurement object; and allow the sensor cable 2 to remain in a state causing the sensor cable 2 to be bent to a shape so that a direction of each of axial lines A1 and A2 of a first portion 2d and second portion 2e in front of and at the back of a mount portion of an attachment 4 in the sensor cable 2 is a mutually different direction in a state mounted to the sensor cable 2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an attachment to be attached to a sensor cable of a flexible sensor, a flexible sensor provided with the attachment, and an arrangement method for arranging a sensor cable so as to surround a measurement object.

  As this type of flexible sensor, a flexible sensor disclosed by the applicant in Patent Document 1 below is known. This flexible sensor includes a sensor cable and a connecting mechanism that connects and disconnects both ends (tip and base ends) of the sensor cable, and in a state where the sensor cable is disposed so as to surround the measurement object. The current flowing through the object can be detected. In this case, when surrounding the object to be measured with the sensor cable, the tip of the sensor cable is removed from the connection mechanism, and then the sensor cable's tip and the connection mechanism are grasped one by one by hand. The distal end portion is turned around the measurement object, and then the distal end portion of the sensor cable is coupled to the coupling mechanism. Thereby, a sensor cable is arrange | positioned so that a measurement object may be surrounded.

JP 2013-72761 A (page 6, FIG. 1)

  However, the conventional flexible sensor described above has the following problems to be improved. That is, in this flexible sensor, it is necessary to turn the tip of the sensor cable around the electric wire when surrounding the measurement object with the sensor cable. In this case, for example, when there are obstacles such as other wires or walls in the vicinity of the wire as the measurement target, the tip of the sensor cable cannot be turned around the measurement target by hand. There is. In addition, for example, even when the measurement target is placed in a place where the hand cannot reach, such as the back of the cabinet, the tip of the sensor cable may not be turned around the measurement target using the hand. As described above, in the conventional flexible sensor, since the tip of the sensor cable cannot be turned around the measurement target, it is sometimes difficult to surround the measurement target with the sensor cable. It is desired.

  The present invention has been made in view of such problems, and it is a main object of the present invention to provide an attachment, a flexible sensor, and an arrangement method capable of reliably and easily performing an operation of arranging a sensor cable in a state surrounding a measurement object. To do.

In order to achieve the above object, the attachment according to claim 1 is an attachment to be attached to the sensor cable of a flexible sensor including a flexible sensor cable that detects a physical quantity of the measurement target in a state of being arranged so as to surround the measurement target. Because
The sensor cable is configured to be detachable between both end portions, and in the state where the sensor cable is attached, the directions of the respective axes of the sensor cable before and after the attachment attachment portion are different from each other. The sensor cable is configured to be maintained in a bent state in which the shape or the respective axes are spaced apart and parallel to each other.

  In addition, the attachment according to claim 2 is configured to be attached to the sensor cable by fitting the sensor cable from the opening portion and being formed in a hook shape having the opening portion in the attachment according to claim 1. Yes.

  Moreover, the attachment of Claim 3 is formed in the attachment of Claim 1 or 2 so that both ends are thinned toward the front-end | tip.

  The attachment according to claim 4 is the attachment according to any one of claims 1 to 3, wherein a radius of curvature of the attachment portion of the sensor cable is larger than a minimum bendable radius of the sensor cable. It is comprised so that it may become.

  The attachment according to claim 5 is configured to be able to maintain the sensor cable in a bent state in the attachment according to any one of claims 1 to 4 so that the direction of each axis is 90 °. ing.

  The attachment according to claim 6 is configured to be able to be maintained in a state in which the sensor cable is bent in a shape in which the direction of each axis forms an obtuse angle in the attachment according to any one of claims 1 to 4. Yes.

  The attachment according to claim 7 is configured to be able to be maintained in a state in which the sensor cable is bent in a shape in which the direction of each axis forms an acute angle in the attachment according to any one of claims 1 to 4. Yes.

  A flexible sensor according to an eighth aspect includes the attachment according to any one of the first to seventh aspects, the sensor cable, and a coupling mechanism for coupling and decoupling the both ends of the sensor cable. I have.

  According to a ninth aspect of the present invention, in the arrangement method according to the ninth aspect, the sensor cable of the flexible sensor including the flexible sensor cable that detects the physical quantity of the measurement object is surrounded so as to surround the measurement object. The arrangement method is arranged to be detachable between both end portions of the sensor cable, and in the state of being attached to the sensor cable, the directions of the respective axes of the portions before and after the attachment portion of the sensor cable Are attached to the sensor cable, and the attachment is attached to the sensor cable so that the sensor cable can be kept bent in a shape in which the directions are different from each other or in a shape in which the axes are spaced apart and parallel to each other. In this state, connect one end of the sensor cable to the object to be measured. Crowded Turn Ri placing the sensor cable.

  According to the attachment according to claim 1, the flexible sensor according to claim 8, and the arrangement method according to claim 9, the sensor cable is configured to be detachable and before and after the mounting portion of the sensor cable in the mounted state. The attachment is configured so that the sensor cable can be bent and maintained in a shape in which the directions of the axes of the parts of the part are different from each other or in a shape in which the axes are separated from and parallel to each other. By placing the cable and attaching the attachment to the sensor cable, the mounting part of the sensor cable can be bent. For example, even when an obstacle exists near the measurement object, the measurement object Without inserting your hand between the sensor and the obstacle It is a way to push Turn to Ri. For this reason, according to this attachment, a flexible sensor, and an arrangement | positioning method, even in such a case, the operation | work which arrange | positions a sensor cable so that a measurement object may be surrounded can be performed reliably and easily.

  In addition, according to the attachment according to claim 2 and the flexible sensor according to claim 8, the attachment is formed so as to be attached to the sensor cable by being fitted in the sensor cable from the opening while being formed into a bowl shape having the opening. As a result, the attachment can be easily attached to and detached from the sensor cable, so that the efficiency of the work of arranging the sensor cable can be sufficiently improved.

  Moreover, according to the attachment of Claim 3, and the flexible sensor of Claim 8, since both ends were formed thinly toward the front-end | tip, for example, the obstruction is arrange | positioned close to the measuring object. In this case, it is possible to smoothly insert the sensor cable with the attachment into the narrow gap between the object to be measured and the obstruction between the tip of the end and the object to be measured or the obstacle. it can. For this reason, according to this attachment and flexible sensor, the efficiency of the operation | work which arrange | positions a sensor cable can further be improved.

  According to the attachment of claim 4 and the flexible sensor of claim 8, the attachment is configured such that the radius of curvature of the attachment portion of the sensor cable is larger than the minimum bendable radius of the sensor cable. As a result, it is possible to reliably prevent the sensor cable from being damaged by bending the sensor cable beyond the bendable range when the attachment is attached.

  Further, according to the attachment according to claim 5 and the flexible sensor according to claim 8, by configuring the attachment so that the sensor cable can be kept bent in a shape in which the direction of each axis forms 90 °, It is possible to sufficiently improve the efficiency of the arrangement work of the sensor cable with respect to the measurement object that is easily turned when the sensor cable is bent into an arc shape of about ¼ of the circumference.

  According to the attachment according to claim 6 and the flexible sensor according to claim 8, the attachment is configured such that the sensor cable can be maintained in a bent state so that the direction of each axis forms an obtuse angle. When the sensor cable is bent into an arc shape shorter than ¼ of the circumference, it is possible to sufficiently improve the efficiency of the arrangement work of the sensor cable with respect to the measurement object that is easily turned.

  Further, according to the attachment according to claim 7 and the flexible sensor according to claim 8, the attachment is configured so that the sensor cable can be maintained in a bent state so that the direction of each axis forms an acute angle. When the sensor cable is bent into an arc shape longer than ¼ of the circumference, the efficiency of the arrangement work of the sensor cable with respect to the measurement object that is easy to be wound can be sufficiently improved.

1 is a configuration diagram showing a configuration of a flexible sensor 1. FIG. 3 is a perspective view showing a configuration of an attachment 4. FIG. It is a top view of the attachment 4. FIG. FIG. 3 is a first explanatory diagram for explaining how to use the flexible sensor 1. It is the 2nd explanatory view explaining how to use flexible sensor 1. It is the 3rd explanatory view explaining how to use flexible sensor 1. It is the 4th explanatory view explaining how to use flexible sensor 1. FIG. 10 is a fifth explanatory diagram illustrating how to use the flexible sensor 1. 4 is a perspective view showing a configuration of an attachment 104. FIG. 4 is a perspective view showing a configuration of an attachment 204. FIG. 4 is a plan view showing a configuration of an attachment 304. FIG. 4 is a plan view showing a configuration of an attachment 404. FIG. 5 is a plan view showing a configuration of an attachment 504. FIG.

  Hereinafter, embodiments of an attachment, a flexible sensor, and an arrangement method will be described with reference to the accompanying drawings.

  Initially, the structure of the flexible sensor 1 shown in FIG. 1 as an example of a flexible sensor is demonstrated. As shown in the figure, the flexible sensor 1 includes a sensor cable 2, a main body 3, and an attachment 4, and is configured to detect a current (an example of a physical quantity) flowing through an electric wire 50 as a measurement target.

  The sensor cable 2 is, for example, a flexible (flexible) Rogowski coil formed by winding an insulated conductor (none of which is shown) around the coil, and is arranged so as to surround the electric wire 50. In this state, the current flowing through the electric wire 50 is detected.

  The connecting mechanism 3 has a function of connecting and releasing the base end 2a and the front end 2b (both ends) in the sensor cable 2. In this case, in this flexible sensor 1, as shown in FIG. 1, the base end 2 a of the sensor cable 2 is fixed to the connection mechanism 3, and the sensor cable 2 is inserted into the insertion hole 3 a formed in the connection mechanism 3. By inserting the distal end portion 2b, the proximal end portion 2a and the distal end portion 2b are connected, and by extracting the distal end portion 2b from the insertion hole 3a, the connection between the proximal end portion 2a and the distal end portion 2b is released. It is configured.

  The attachment 4 is an attachment used when the sensor cable 2 is arranged so as to surround the electric wire 50. As shown in FIG. 4, the attachment 4 includes an intermediate portion 2c (base end portion 2a and tip end portion 2b). It is comprised so that attachment or detachment is possible. In this case, as shown in FIG. 2, the attachment 4 is formed in a bowl shape in which a part of the peripheral wall of the bent cylindrical body is cut in the length direction to provide an opening C, and the sensor cable is connected to the sensor cable from the opening C. 2 is fitted to the sensor cable 2 by fitting the intermediate portion 2c. As shown in FIGS. 2 and 3, the attachment 4 is formed so that the end portions 4a and 4b become thinner toward the tip.

  As shown in FIG. 4, the attachment 4 is attached to the intermediate portion 2c of the sensor cable 2, and the direction of the axis A1 of the first portion 2d on the base end 2a side of the attachment portion of the sensor cable 2 The sensor cable 2 has a function of bending the sensor cable 2 so that the direction of the axis A2 of the second portion 2e on the tip end 2b side of the mounting portion in the sensor cable 2 is different from each other, and maintaining the bent state. Yes. In this case, as an example, the attachment 4 is formed so that the shape in plan view forms an arc corresponding to ¼ of the circumference, as shown in FIG. 3, and the first portion 2d as shown in FIG. The sensor cable 2 is bent so that the axis A1 of the second portion 2e and the axis A2 of the axis A2 of the second portion 2e form 90 ° (orthogonal). In addition, as shown in FIG. 3, the attachment 4 has a curvature radius r at the center in the width direction that is the minimum bendable radius of the sensor cable 2 (minimum radius of the axis of the sensor cable 2: hereinafter, “minimum bend radius”). It is formed to be larger than (also called). That is, the attachment 4 is configured such that, in a state where the attachment 4 is attached to the sensor cable 2, the radius of curvature of the attachment portion of the sensor cable 2 is larger than the minimum bending radius. The attachment 4 is made of a material having an appropriate hardness (for example, a resin having a relatively high hardness such as polyacetal, acrylic resin, polycarbonate, polyamide resin, etc.) in order to reliably maintain the bent state of the sensor cable 2. ).

  Next, the usage method of the flexible sensor 1 is demonstrated with reference to drawings.

  For example, when measuring the current flowing in the electric wire 50 (refer to FIGS. 1 and 6) as a measurement target using the flexible sensor 1, a measurement device (not shown) and the flexible sensor 1 are connected by a cable (not shown). To do. Next, the sensor cable 2 is arranged so as to surround the electric wire 50 by the arrangement method described below.

  In this arrangement method, first, when the proximal end 2a and the distal end 2b of the sensor cable 2 are connected (see FIG. 1), the end 2b of the sensor cable 2 is pulled out from the insertion hole 3a of the connecting mechanism 3, The connection between the proximal end portion 2a and the distal end portion 2b is released.

  In this case, as shown in FIG. 1, when there is no obstacle or other electric wire in the vicinity of the electric wire 50, the connection mechanism 3 and the tip end portion 2b of the sensor cable 2 are grasped one by one. Then, the distal end portion 2b of the sensor cable 2 is turned around the electric wire 50, and then the distal end portion 2b is inserted into the insertion hole 3a of the coupling mechanism 3 to connect the proximal end portion 2a and the distal end portion 2b of the sensor cable 2. Let Thereby, as shown to the figure, the sensor cable 2 is arrange | positioned so that the electric wire 50 may be surrounded.

  Subsequently, the measurement device is operated to start measurement. At this time, the sensor cable 2 of the flexible sensor 1 detects the current flowing through the electric wire 50 and outputs a detection signal, and the measurement device measures the current value based on the detection signal. Next, when the measurement is finished, the distal end portion 2b of the sensor cable 2 is pulled out from the insertion hole 3a of the coupling mechanism 3, and subsequently, the operation of the electric wire 50 by the sensor cable 2 is performed in an operation reverse to the operation for surrounding the electric wire 50 described above. Release the enclosure.

  On the other hand, as shown in FIG. 6, non-measuring electric wires 60 a and 60 b are arranged in the vicinity of the measuring electric wire 50, and a hand is put between the electric wires 50 and 60 a and 60 b around the electric wires 50. When the tip 2b of the sensor cable 2 cannot be turned around, the attachment 4 is attached to the sensor cable 2.

  Specifically, as shown in FIG. 4, the intermediate portion 2c of the sensor cable 2 is bent, and the attachment is performed by pushing the intermediate portion 2c from the open portion C of the attachment 4 toward the bottom portion B (see FIGS. 2 and 3). 4 is fitted with the intermediate portion 2c. As a result, the attachment 4 is attached to the sensor cable 2 as shown in FIGS.

  In this case, as shown in FIG. 3, the attachment 4 is formed such that the shape in plan view forms an arc corresponding to ¼ of the circumference. For this reason, the sensor cable 2 to which the attachment 4 is attached is, as shown in FIG. 4, from the axis A1 of the first part 2d closer to the base end 2a than the attachment part of the attachment 4 and the attachment part of the sensor cable 2. Are bent so that the axis A2 of the second portion 2e on the tip end 2b side forms 90 ° (that is, the directions of the axes A1 and A2 are different from each other), and the bent state is maintained. (See also FIG. 5).

  Next, the sensor cable 2 in a state where the attachment 4 is mounted is gripped by a portion closer to the base end 2a than the attachment portion of the attachment 4, and as shown in FIG. 6, between the electric wire 50 to be measured and the electric wire 60a. The tip 2b of the sensor cable 2 is brought close to the sensor cable 2. Subsequently, as shown in FIG. 7, the distal end portion 2 b is inserted into the back side through the gap between the electric wire 50 and the electric wire 60 a and is turned around the electric wire 50. Next, as shown in FIG. 8, the distal end portion 2b is protruded toward the front side from the gap between the electric wire 50 and the electric wire 60b.

  Subsequently, the front end 2b is grasped and pulled toward the front side. Next, the attachment 4 is removed from the sensor cable 2, and then the distal end portion 2 b is inserted into the insertion hole 3 a of the coupling mechanism 3 to connect the proximal end portion 2 a and the distal end portion 2 b of the sensor cable 2. Thereby, the sensor cable 2 is arrange | positioned so that the electric wire 50 may be surrounded.

  In this case, since the attachment portion of the sensor cable 2 is maintained in the bent state by attaching the attachment 4 to the sensor cable 2, as shown in FIGS. 6 to 8, the electric wire 50 and the electric wires 60a and 60b The tip 2b can be turned around the electric wire 50 without putting a hand in between. For this reason, the electric wires 60a and 60b that are not to be measured are arranged in the vicinity of the electric wire 50 to be measured, and a hand is put between the electric wires 50 and the electric wires 60a and 60b, and the tip of the sensor cable 2 around the electric wires 50. Even in the case where 2b cannot be turned around, it is possible to reliably and easily perform the operation of surrounding the electric wire 50 to be measured with the sensor cable 2 and arranging it.

  Subsequently, the measurement device is operated to start measurement. Next, when the measurement is finished, the distal end portion 2b of the sensor cable 2 is pulled out from the insertion hole 3a of the coupling mechanism 3, and subsequently, the operation of the electric wire 50 by the sensor cable 2 is performed in an operation reverse to the operation for surrounding the electric wire 50 described above. Release the enclosure. Also in this case, since the mounting portion of the sensor cable 2 is maintained in a bent state, the gap between the electric wire 50 and the electric wires 60a and 60b can be obtained without putting a hand between the electric wire 50 and the electric wires 60a and 60b. Since the tip portion 2b can be passed through the sensor cable 2, it is possible to easily release the surrounding of the electric wire 50 by the sensor cable 2.

  As described above, according to the attachment 4, the flexible sensor 1, and the arrangement method, the sensor cable 2 is configured to be detachable and the axes A1 and A2 of the front and back portions of the sensor cable 2 in the mounted state. The attachment 4 is configured such that the sensor cable 2 can be maintained in a bent state so that the directions of the sensor cables 2 are different from each other, and the attachment of the attachment 4 to the sensor cable 2 is performed by arranging the sensor cable 2 using the attachment 4. Thus, since the mounting portion of the sensor cable 2 can be bent, for example, even when there are unmeasured wires 60a and 60b in the vicinity of the measured wire 50, the wires 50 and 60a, Rotate the tip 2b around the wire 50 without putting a hand between it and 60b Door can be. For this reason, according to this attachment 4, the flexible sensor 1, and the arrangement | positioning method, even in such a case, the operation | work which arrange | positions the sensor cable 2 so that the electric wire 50 to be measured can be surrounded can be performed reliably and easily.

  Further, according to the attachment 4, the flexible sensor 1, and the arrangement method, the attachment 4 is formed in a bowl shape having the opening C, and the sensor cable 2 is fitted into the opening 4 so that the attachment 4 can be attached to the sensor cable 2. By configuring and arranging the sensor cable 2 using this attachment 4, the attachment 4 can be easily attached to and detached from the sensor cable 2, so that the efficiency of the work of arranging the sensor cable 2 is sufficiently improved. Can do.

  Moreover, according to this attachment 4, the flexible sensor 1, and the arrangement | positioning method, since the edge parts 4a and 4b were formed thinly toward the front-end | tip, for example, it adjoins to the electric wire 50 of a measuring object, and is not the measuring object electric wire 60a , 60b are disposed, the tip of the ends 4a, 4b and the wire 50 or 60a when the sensor cable 2 with the attachment 4 is inserted into a narrow gap between the wire 50 and the wires 60a, 60b. , 60b, and can be inserted smoothly. For this reason, according to this attachment 4, the flexible sensor 1, and the arrangement | positioning method, the efficiency of the operation | work which arrange | positions the sensor cable 2 can further be improved.

  Further, according to the attachment 4, the flexible sensor 1, and the arrangement method, the attachment 4 is configured such that the curvature radius r of the attachment portion of the attachment 4 in the sensor cable 2 is larger than the minimum bendable radius of the sensor cable 2. As a result, it is possible to reliably prevent the sensor cable 2 from being damaged by bending the sensor cable 2 beyond the bendable range when the attachment 4 is attached.

  In addition, according to the attachment 4, the flexible sensor 1, and the arrangement method, the attachment 4 is configured so that the sensor cable 2 can be maintained in a bent state in a shape in which the directions of the axes A1 and A2 form 90 °. When the sensor cable 2 is bent into an arc shape having a length of about ¼ of the circumference, the efficiency of the arrangement work of the sensor cable 2 with respect to the electric wire 50 to be measured that can be easily wound can be sufficiently improved. .

  Note that the attachment, the flexible sensor, and the arrangement method are not limited to the above-described configuration and method. For example, although the example in which the attachment 4 is formed in a bowl shape has been described above, the attachment 104 shown in FIG. 9 can also be adopted. The attachment 104 has end portions 104a and 104b formed in a short bowl shape, and the end portions 104a and 104b are connected by three connecting members 104c having a circular arc shape in a plan view and a rod shape. In this case, each connecting member 104c is formed of a hard material such as resin or metal having high hardness in order to reliably maintain the sensor cable 2 in a bent state. The number of connecting members 104c is not limited to three, and any number of one, two, four or more can be employed.

  Further, as shown in FIG. 10, an attachment 204 configured by a bent cylindrical body through which the sensor cable 2 can be inserted may be employed.

  The attachments 4 and 104 are formed so that the end portions 4a, 4b, 104a, and 104b become thinner toward the tip (see FIGS. 2 and 9), but like the attachment 204 (FIG. 10). For example, a configuration in which the thicknesses of the end portions 4a, 4b, 104a, and 104b are uniform (not thinned toward the tip) may be employed.

  Further, the example in which the attachment 4 is configured such that the axis A1 of the first part 2d and the axis A2 of the axis A2 of the second part 2e form 90 ° to bend the sensor cable 2 has been described above. Attachments 4, 104, and 204 can be configured to bend sensor cable 2 at an angle other than 90 ° with respect to A2.

  As an example, as shown in FIG. 11, an attachment 304 configured to maintain the sensor cable 2 in a bent state in which the directions of the axes A1 and A2 form an obtuse angle (120 ° in this example) is employed. be able to. In this case, also in this configuration, it is preferable to define the radius of curvature r of the center portion in the width direction to be larger than the minimum bending radius of the sensor cable 2 as shown in FIG. According to this attachment 304, it is possible to sufficiently improve the efficiency of the arrangement work of the sensor cable 2 with respect to the measuring object that is easy to be turned when the sensor cable 2 is bent into an arc shape shorter than ¼ of the circumference. Can do.

  Further, as shown in FIG. 12, an attachment 404 configured to be able to maintain the sensor cable 2 in a bent state in which the directions of the axes A1 and A2 form an acute angle (60 ° in this example) is employed. Can do. In this case, also in this configuration, it is preferable to define the radius of curvature r of the center portion in the width direction to be larger than the minimum bending radius of the sensor cable 2 as shown in FIG. According to this attachment 404, it is possible to sufficiently improve the efficiency of the arrangement work of the sensor cable 2 with respect to the measurement object that is easy to be turned when the sensor cable 2 is bent into an arc shape longer than ¼ of the circumference. Can do.

  Furthermore, as shown in FIG. 13, it is possible to employ an attachment 504 configured to be able to maintain the sensor cable 2 in a state in which the axes A1 and A2 are spaced apart and parallel to each other. In this case, also in this configuration, it is preferable to define the radius of curvature r of the center portion in the width direction to be larger than the minimum bending radius of the sensor cable 2 as shown in FIG. According to this attachment 504, the efficiency of the arrangement work of the sensor cable 2 with respect to the measuring object which is easy to be wound when the sensor cable 2 is bent into an arc shape having a length of about ½ of the circumference is sufficiently improved. Can be made.

  In addition, by preparing the above-mentioned various attachments 4, 304, 404, and 504 in which the angles formed by the axes A1 and A2 are different from each other, it is possible to efficiently connect the sensor cable 2 corresponding to various arrangement states of measurement objects. Can be arranged.

DESCRIPTION OF SYMBOLS 1 Flexible sensor 2 Sensor cable 2b Tip part 2a Base end part 2c Middle part 2d 1st site | part 2e 2nd site | part 3 Connection mechanism 4,104,204,304,404,504 Attachment 4a, 4b End part 50 Electric wire A1, A2 Axis line C Open part

Claims (9)

An attachment to be attached to the sensor cable of a flexible sensor provided with a flexible sensor cable for detecting a physical quantity of the measurement object in a state arranged to surround the measurement object,
The sensor cable is configured to be detachable between both end portions, and in the state where the sensor cable is attached, the directions of the respective axes of the sensor cable before and after the attachment attachment portion are different from each other. An attachment configured to be able to maintain the sensor cable bent in a shape or a shape in which the axes are spaced apart and parallel to each other.   The attachment according to claim 1, wherein the attachment is formed in a bowl shape having an open portion and is attachable to the sensor cable by fitting the sensor cable from the open portion.   The attachment according to claim 1 or 2, wherein both ends are formed thinner toward the tip.   The attachment according to any one of claims 1 to 3, wherein a radius of curvature of an attachment portion of the sensor cable is configured to be larger than a minimum bendable radius of the sensor cable.   The attachment according to any one of claims 1 to 4, wherein the attachment is configured to be maintained in a state in which the sensor cable is bent in a shape in which the direction of each axis is 90 °.   The attachment according to any one of claims 1 to 4, wherein the attachment is configured to be maintained in a state in which the sensor cable is bent into a shape in which the direction of each axis forms an obtuse angle.   The attachment according to any one of claims 1 to 4, wherein the attachment is configured to be maintained in a state in which the sensor cable is bent into a shape in which the direction of each axis forms an acute angle.   A flexible sensor comprising the attachment according to claim 1, the sensor cable, and a connection mechanism for connecting and releasing the both ends of the sensor cable. An arrangement method for arranging the sensor cable of a flexible sensor provided with a flexible sensor cable for detecting a physical quantity of the measurement object in a state of being arranged so as to surround the measurement object, so as to surround the measurement object,
The sensor cable is configured to be detachable between both ends of the sensor cable, and in a state where the sensor cable is attached to the sensor cable, a shape in which the directions of the respective axes on the front and rear sides of the attachment part are different from each other, or the shape An attachment configured to be able to maintain the sensor cable bent in a shape in which the respective axes are spaced apart and parallel to each other is attached to the sensor cable, and one of the sensor cables is attached with the attachment attached. An arrangement method in which the sensor cable is arranged by turning an end portion around the measurement object.

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