JP2016090490A - Flexible sensor and measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a measurement work to be performed efficiently and at the same time easily.SOLUTION: The flexible sensor is provided with: a sensor cable 2 that detects a detected amount of a measurement object while being disposed so as to surround the measurement object; a coupling mechanism 3 that is attached to a base end part 2a of the sensor cable 2 for coupling or cancelling the coupling between a tip 2b of the sensor cable 2 and the base end part 2a (an engagement member 21 attached to the base end part 2a); and a light radiation part 4 that radiates light from the tip 2b toward the front.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flexible sensor that detects a detection amount of a measurement target in a state where the measurement target is disposed so as to surround the measurement target, and a measurement apparatus including the flexible sensor.

  As this type of flexible sensor, a current detector disclosed in Patent Document 1 below is known. This current detector is connected to the detector wound around the current line to be measured, the holding member that holds each end (base end and tip) of the detector joined, and the output line of the detector And a signal processing unit for processing the output signal, and configured to be able to detect the current flowing through the current line to be measured. In this case, the holding member has a socket-shaped holding member that has a concave engaging portion and is fixed to the proximal end portion of the detecting portion, and a convex member that is fixed to the distal end portion of the detecting portion. A plug-type holding member, and the end portions of the detection unit are joined to each other by engaging the concave engaging portion of the socket-type holding member with the convex engaging portion of the plug-type holding member. It is configured.

JP 2006-329826 A (page 3-4, FIG. 2)

  However, the current detector has the following problems to be improved. That is, when detecting the current flowing through the current line to be measured using this type of current detector including this current detector, the plug-type holding member fixed to the tip of the detection unit is used as the base of the detection unit. It removes from the socket-type holding member fixed to the end, wraps the detection part around the current line to be measured, and then engages each holding member. In this case, when the measurement current line is not installed at the measurement site or the current line to be measured is arranged at a position where the illumination light is not irradiated even if it is installed, the work of wrapping the detection unit around the current measurement line is performed. It may be difficult. For this reason, when performing measurement at such a measurement site, it is necessary to perform an operation of winding the detection unit and an operation of engaging each holding member while illuminating the arrangement position using a flashlight or a headlight. There is a problem that the measurement work is complicated and inefficient.

  This invention is made | formed in view of this subject, and it aims at providing the flexible sensor and measuring apparatus which can perform a measurement operation | work efficiently and easily.

  In order to achieve the above object, a flexible sensor according to claim 1 is attached to a sensor cable for detecting a detected amount of the measurement object in a state of being arranged so as to surround the measurement object, and to a proximal end portion of the sensor cable. A first sensor that emits light forward from the distal end portion, the flexible sensor including a connection mechanism for connecting and releasing the distal end portion and the proximal end portion of the sensor cable. A radiation part is provided.

  The flexible sensor according to claim 2 is the flexible sensor according to claim 1, wherein the first light emitting portion is disposed between a light source disposed in the coupling mechanism and the light source and the tip portion. And an optical fiber that guides the light from the light source to the tip portion.

  The flexible sensor according to claim 3 is the flexible sensor according to claim 1, wherein the first light emitting portion includes a light source disposed at the tip portion and a power line for supplying power to the light source. And is configured.

  The flexible sensor according to claim 4 is the flexible sensor according to any one of claims 1 to 3, wherein the second light radiates light from at least one of the base end side of the sensor cable and the coupling mechanism. A radiation part is provided.

  The flexible sensor according to claim 5 is the flexible sensor according to any one of claims 1 to 4, wherein light is emitted from an outer peripheral surface of a predetermined range in a length direction of the sensor cable toward a side. A third light radiating section for radiating is provided.

  The flexible sensor according to claim 6 is the flexible sensor according to any one of claims 1 to 5, wherein the first end portion and the base end portion of the sensor cable are disconnected. The light emission part is made to radiate | emit light, and when the said front-end | tip part and the said base end part are connected, the switching part which stops the emission of the light by the said 1st light emission part is provided.

  According to a seventh aspect of the present invention, there is provided a measuring apparatus that measures a measured amount of the measurement target based on the flexible sensor according to any one of the first to sixth aspects and the detected amount detected by the flexible sensor. And a measuring unit to perform.

  According to the flexible sensor according to claim 1 and the measurement device according to claim 7, the first optical radiation unit that radiates light forward from the front end of the sensor cable is provided. Even when the light is dark, the measurement object and the surroundings of the measurement object are surely illuminated by the emitted light, so that the arrangement state of the measurement object can be reliably grasped. In addition, according to the flexible sensor and the measurement apparatus, when another measurement object is disposed adjacent to the measurement object, the adjacent measurement object is separated and another measurement object is separated from the measurement object. When the tip is passed through, the position of the tip can be easily grasped by the light emitted from the tip. Therefore, according to the flexible sensor and the measuring apparatus, it is possible to efficiently and easily perform the work of surrounding the measurement target with the sensor cable.

  In the flexible sensor according to claim 2 and the measuring device according to claim 7, the light from the light source is disposed at the front end by being disposed between the light source disposed in the coupling mechanism and the light source and the front end. For example, when the space for arranging the light source cannot be secured at the tip of the sensor cable (that is, the tip of the sensor cable is small) In this case, light from the light source disposed in the coupling mechanism can be emitted forward from the tip. Therefore, according to the flexible sensor and the measuring apparatus, even when the tip portion of the sensor cable is small, the work of surrounding the measurement target with the sensor cable can be performed efficiently and easily.

  The flexible sensor according to claim 3 and the measuring device according to claim 7 include a light source disposed at the tip portion and a power line for supplying power to the light source, and the first light emission. Because the power cable is thinner than the optical fiber inside the sensor cable without arranging the optical fiber inside the sensor cable. Even when it is difficult to dispose inside the cable, it is possible to emit light from the light source disposed at the tip of the sensor cable so that the light is emitted forward from the tip. Therefore, according to the flexible sensor and the measuring apparatus, even when the sensor cable is thin, the work of surrounding the measurement object with the sensor cable can be performed efficiently and easily.

  Further, according to the flexible sensor according to claim 4 and the measuring device according to claim 7, by including the second light emitting portion that emits light from at least one of the proximal end side of the sensor cable and the coupling mechanism. Even when the measurement object is placed in a dark place, the base end of the sensor cable can be surely grasped by the light emitted from the second light emitting portion by the base end side of the sensor cable and the position of the coupling mechanism. It is possible to easily connect and disconnect the portion and the tip portion.

  Moreover, according to the flexible sensor of Claim 5, and the measuring apparatus of Claim 7, the 3rd light which radiates | emits light toward the side from the outer peripheral surface of the predetermined range of the length direction in a sensor cable. By providing the radiating unit, the position of the sensor cable can be reliably grasped even when the measurement object is placed in a dark place. In addition, when other measurement objects are arranged adjacent to the measurement object (a plurality of measurement objects are complicated), it is possible to reliably grasp where the sensor cable passes. Therefore, according to the flexible sensor and the measuring apparatus, the work of surrounding the measurement object with the sensor cable can be performed more efficiently and more easily.

  In the flexible sensor according to claim 6 and the measuring device according to claim 7, when the distal end portion and the proximal end portion of the sensor cable are disconnected, light is emitted to the first light emitting portion. By providing a switching unit that stops the emission of light by the first light emitting unit when the distal end and the base end are connected, sufficient power consumption of the flexible sensor (first light emitting unit) is achieved. Can be reduced. In addition, according to the flexible sensor and the measuring apparatus, for example, the first light emitting unit is configured to emit light from the light source disposed at the distal end portion of the sensor cable via the power line disposed in the sensor cable. In this case, when detection of the detected amount by the sensor cable is started by connecting the base end portion and the distal end portion of the sensor cable, the sensor cable is connected to the light source via the power line arranged in the sensor cable. On the other hand, it is possible to reliably avoid the influence of noise or the like on the detection of the detected amount due to the supply of power.

1 is a configuration diagram showing a configuration of a measuring apparatus 100. FIG. FIG. 3 is a perspective view showing configurations of a fitting member 21 and a light emitting unit 4. FIG. 3 is a plan view showing configurations of a coupling mechanism 3 and a light emitting unit 4. FIG. 3 is a first explanatory diagram explaining how to use the measuring apparatus 100. FIG. 6 is a second explanatory diagram for explaining how to use the measuring apparatus 100. FIG. 6 is a third explanatory diagram for explaining how to use the measuring apparatus 100. It is a perspective view which shows the structure of 4 A of light emission parts (the front-end | tip part 2b side of the sensor cable 2) in 1 A of flexible sensors. It is a top view which shows the structure of the connection mechanism 3 (the base end part 2a side of the sensor cable 2) in 1 A of flexible sensors. FIG. 6 is an explanatory diagram illustrating a configuration of a light emitting unit 7.

  Hereinafter, embodiments of a flexible sensor and a measuring apparatus will be described with reference to the accompanying drawings.

  First, the configuration of the measurement apparatus 100 shown in FIG. 1 as an example of the measurement apparatus will be described. As shown in the figure, the measuring apparatus 100 includes the flexible sensor 1 and the measuring unit 60, and the amount to be measured (for example, the current flowing through the electric wire 200) of the measurement target (for example, the electric wire 200 shown in FIG. 4). It is configured to be measurable.

  The flexible sensor 1 is an example of a flexible sensor, and includes a sensor cable 2, a coupling mechanism 3, and a light emitting unit 4 (corresponding to a first light emitting unit) as shown in FIG.

  As an example, the sensor cable 2 is composed of a flexible Rogowski coil formed by winding an insulated conductor (not shown) around a coil support so as to surround the electric wire 200 as a measurement target. (See FIG. 6), the detected amount of the electric wire 200 (for example, a magnetic field generated by the current flowing through the electric wire 200) is detected and an electric signal is output.

  Further, as shown in FIGS. 1 and 2, a fitting member 21 capable of fitting with the fitting portion 31 (see FIG. 3) of the coupling mechanism 3 is attached to the distal end portion 2 b of the sensor cable 2. . In this case, as shown in FIG. 2, the fitting member 21 has a substantially cylindrical shape in which the distal end portion 21a is closed and the proximal end portion 21b is opened. Inside the fitting member 21, the distal end portion 2b of the sensor cable 2 and the distal end portion 21a of the fitting member 21 inserted into the inside from the opening of the base end portion 21b are fixed. Further, a fitting hole 21d is formed in the front end surface 21c of the fitting member 21, and a lens 44 described later in the light emitting portion 4 is fitted in the fitting hole 21d.

  The connection mechanism 3 is a mechanism for connecting and releasing the base end portion 2a and the tip end portion 2b of the sensor cable 2, and is configured in a substantially cylindrical shape as shown in FIG. It is attached to the base end 2a. Further, as shown in FIG. 3, the coupling mechanism 3 is formed so that the fitting member 21 can be inserted, and the fitting portion 31 that fits the fitting member 21 in the inserted state, and the fitting member 21 and the fitting portion. And a lock portion 32 that restricts the separation from 31 (maintains the fitted state).

  Further, as shown in FIG. 3, a light source 41 and a lens 43 (to be described later) in the light emitting unit 4 are disposed inside the coupling mechanism 3. In addition, as shown in FIGS. 1 and 3, the coupling mechanism 3 is provided with a cable 50 connected to the measurement unit 60. The cable 50 is connected to an insulated conductor constituting the sensor cable 2 and is a signal line for inputting an electric signal output from the sensor cable 2 to the measuring device, and a light source disposed in the coupling mechanism 3. The power supply line for supplying power to 41 is provided.

  As shown in FIG. 4, the light emitting portion 4 is configured to be able to emit light L from the front end portion 2 b (fitting member 21) of the sensor cable 2 toward the front. Specifically, as shown in FIGS. 2 and 3, the light emitting unit 4 includes a light source 41, a light guide 42, and lenses 43 and 44. As an example, the light source 41 is configured by an LED, and is disposed in the coupling mechanism 3 as shown in FIG. The light source 41 emits light L by emitting light from a power source supplied from an external device (a measuring device to which the cable 50 is connected) via the power line of the cable 50.

  As an example, the light guide 42 is composed of a bundle fiber in which a plurality of optical fibers are bundled, and is disposed in the sensor cable 2 as shown in FIGS. Further, the light guide 42 has a proximal end portion 42a positioned in the vicinity of the light source 41 in the coupling mechanism 3 (see FIG. 3) and a distal end portion 42b positioned in the vicinity of the distal end surface 21c of the fitting member 21 (see FIG. 3). 2), the light L from the light source 41 is guided from the proximal end portion 42a to the distal end portion 42b (that is, from the proximal end portion 2a of the sensor cable 2 to the distal end portion 2b).

  As shown in FIG. 3, the lens 43 is attached to the base end portion 42 a of the light guide 42 and is disposed in the vicinity of the light source 41 in the coupling mechanism 3. In this case, the lens 43 is a condensing lens, and condenses the light L from the light source 41 toward the base end portion 42 a of the light guide 42.

  As shown in FIG. 2, the lens 44 is attached to the distal end portion 42 b of the light guide 42 and is fitted into a fitting hole 21 d formed in the distal end surface 21 c of the fitting member 21. In this case, the lens 44 is a diffusing lens, and the light L from the light source 41 guided from the base end portion 42a of the light guide 42 to the tip end portion 42b is converted into the tip end portion 2b (tip end portion 2b) of the sensor cable 2. It is made to radiate, diffusing toward the front from tip part 21a) of fitting member 21 attached to.

  The measuring unit 60 measures the amount to be measured (current flowing through the electric wire 200) for the electric wire 200 (measurement target) based on the amount to be detected (magnetic field generated by the current flowing through the electric wire 200) detected by the flexible sensor 1 (sensor cable 2). ).

  Next, a method for measuring a measurement amount for a measurement object using the measurement apparatus 100 will be described with reference to the drawings.

  Using this measuring apparatus 100, one of a plurality of (in the figure, three) electric wires 200 shown in FIG. 4 (for example, the electric wire 200 positioned in the middle in the figure) flows as an object to be measured, and flows into the electric wire 200. When measuring the current as the amount to be measured, first, the cable 50 of the flexible sensor 1 is connected to the measuring unit 60.

  Next, an operation unit (not shown) is operated to start output of power to the light source 41 of the light emitting unit 4. In this case, the power output from the power supply unit (not shown) is supplied to the light source 41 via the power line of the cable 50, and the light source 41 emits light to emit light L. At this time, the light L from the light source 41 is condensed toward the base end portion 42 a of the light guide 42 by the lens 43 of the light emitting unit 4. Next, the light L collected by the lens 43 on the proximal end portion 42 a of the light guide 42 is guided to the distal end portion 42 b of the light guide 42.

  Further, as shown in FIG. 4, the fitting between the fitting member 21 attached to the distal end portion 2 b of the sensor cable 2 and the fitting portion 31 of the coupling mechanism 3 (the base end portion 2 a and the distal end portion of the sensor cable 2 is performed. 2b) and the fitting member 21 is separated from the coupling mechanism 3, the light L guided to the tip 42b of the light guide 42 is diffused by the lens 44 while being diffused by the lens 44. 2 is emitted forward from the front end 2b (the front end 21a of the fitting member 21).

  Subsequently, the tip end 2b side (or the fitting member 21) of the sensor cable 2 in the disconnected state is grasped, and the sensor cable 2 surrounds the periphery of the electric wire 200 to be measured. Here, in this state, as shown in FIG. 4, the light L is radiated forward from the tip 2 b of the sensor cable 2. For this reason, in this flexible sensor 1, the electric wire 200 is arrange | positioned in the position where illumination light is not irradiated even if it is not installed in the measurement field, or it is installed, and the arrangement | positioning place of the electric wire 200 is dark. Even in the case, as a result of reliably illuminating the surroundings of the electric wire 200 and the electric wire 200 with the light L emitted from the distal end portion 2b of the sensor cable 2, the arrangement state of the electric wire 200 (the electric wire 200 can be used without using a flashlight or a headlight). It is possible to reliably grasp the position and shape of each and the presence or absence of surrounding obstacles. Moreover, in this flexible sensor 1, as shown in the figure, when another electric wire 200 (other than the measurement object) is arranged adjacent to the electric wire 200 to be measured, the other adjacent electric wires 200 are separated. On the other hand, when the tip 2b is passed between another electric wire 200, the position of the tip 2b can be easily grasped by the light L emitted from the tip 2b. Therefore, in this flexible sensor 1, as shown in FIG. 5, it is possible to efficiently and easily perform the work of surrounding the electric wire 200 with the sensor cable 2.

  Next, as shown in FIGS. 5 and 6, the fitting member 21 attached to the distal end portion 2 b of the sensor cable 2 surrounding the electric wire 200 is inserted into the fitting portion 31 of the coupling mechanism 3 to be fitted. The member 21 and the fitting part 31 are fitted. At this time, the base end portion 2a and the tip end portion 2b are connected in a state where the end face of the base end portion 2a of the sensor cable 2 and the end face of the tip end portion 2b are close to each other. Subsequently, the lock portion 32 is operated to restrict the separation between the fitting member 21 and the fitting portion 31 (the connected state of the proximal end portion 2a and the distal end portion 2b is maintained).

  On the other hand, the sensor cable 2 in which the proximal end portion 2a and the distal end portion 2b are connected in a state of surrounding the electric wire 200 detects a magnetic field generated by a current flowing through the electric wire 200, and the magnetic field strength (that is, the electric wire 200 is reduced). An electric signal corresponding to the magnitude of the flowing current is output.

  Next, the operation unit is operated to instruct current measurement. In response to this, the measurement unit 60 inputs an electric signal output from the flexible sensor 1 (sensor cable 2) via the signal line of the cable 50, and the value of the current flowing through the electric wire 200 based on the electric signal. Measure.

  Subsequently, when the measurement is completed and the flexible sensor 1 is removed from the electric wire 200 (the state surrounding the electric wire 200 is released), the lock member 32 of the coupling mechanism 3 is operated to engage the fitting member 21 and the fitting portion. The regulation of separation from 31 is released (the connected state of the base end 2a and the tip 2b is released). Next, the fitting member 21 is pulled out from the fitting portion 31.

  Subsequently, the sensor cable 2 is removed from the electric wire 200. The measurement of the current flowing through the electric wire 200 is thus completed. Next, when the current flowing through the other electric wires 200 is measured, the above procedure is repeated.

  As described above, according to the flexible sensor 1 and the measuring apparatus 100, the light emitting unit 4 that emits the light L forward from the distal end portion 2b of the sensor cable 2 is provided, so that the arrangement place of the electric wire 200 is dark. Even in this case, as a result of reliably illuminating the periphery of the electric wire 200 or the electric wire 200 with the emitted light L, the arrangement state of the electric wire 200 can be reliably grasped. Moreover, according to this flexible sensor 1 and the measuring apparatus 100, when the other electric wire 200 is arrange | positioned adjacent to the electric wire 200 of a measuring object, it separates with the other electric wire 200, separating the other adjacent electric wires 200. When the tip portion 2b is passed between the two, the position of the tip portion 2b can be easily grasped by the light L emitted from the tip portion 2b. Therefore, according to the flexible sensor 1 and the measuring apparatus 100, the work of surrounding the electric wire 200 with the sensor cable 2 can be performed efficiently and easily.

  Further, according to the flexible sensor 1 and the measuring apparatus 100, the light L from the light source 41 is disposed between the light source 41 disposed in the coupling mechanism 3 and the light source 41 and the distal end portion 2 b of the sensor cable 2. For example, when the light emitting portion 4 is configured to include the light guide 42 (optical fiber) that guides the light to the distal end portion 2b, a space for arranging the light source cannot be secured at the distal end portion 2b of the sensor cable 2 (that is, Even when the distal end portion 2b of the sensor cable 2 is small), the light L from the light source 41 disposed in the coupling mechanism 3 can be emitted forward from the distal end portion 2b. Therefore, according to the flexible sensor 1 and the measuring apparatus 100, even when the tip 2b of the sensor cable 2 is small, the work of surrounding the electric wire 200 with the sensor cable 2 can be performed efficiently and easily. .

  In addition, the structure of a flexible sensor and a measuring apparatus is not limited to an above-described structure, It can change suitably. For example, as shown in FIGS. 7 and 8, a flexible sensor 1A having a light radiating portion 4A (first light radiating portion) instead of the light radiating portion 4 described above, and a measuring apparatus 100 including the flexible sensor 1A are provided. It can also be adopted. In addition, in the following description, about the same component as the above-mentioned flexible sensor 1, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. In this case, the light radiating section 4A includes a light source 45 and a power supply line 46 as shown in FIG.

  As an example, the light source 45 is configured by an LED, and is disposed in the distal end portion 21a in a state of being fitted into a fitting hole 21d formed in the distal end surface 21c of the fitting member 21, as shown in FIG. Thus, the light L is radiated forward from the distal end portion 21a (the distal end portion 2b of the sensor cable 2). The power line 46 is an electric wire that supplies power to the light source 45, and is disposed inside the sensor cable 2 and connected to the power line of the cable 50 as shown in FIGS. . Also in the flexible sensor 1A having the light emitting portion 4A and the measuring device 100 including the flexible sensor 1A, the light L can be emitted forward from the distal end portion 2b of the sensor cable 2, and thus the flexible sensor described above. The same effect as that of the sensor 1 and the measuring apparatus 100 can be realized. Further, in the flexible sensor 1A and the measuring device 100 including the flexible sensor 1A, the power line 46 thinner than the light guide 42 is provided inside the sensor cable 2 without arranging the light guide 42 inside the sensor cable 2. Even when the sensor cable 2 is thin and it is difficult to arrange the light guide 42 inside the sensor cable 2, the distal end portion 2 b of the sensor cable 2 (the distal end portion of the fitting member 21). The light source 45 disposed in 21a) can be caused to emit light, and the light L can be emitted forward from the tip 2b. Therefore, according to the flexible sensor 1A and the measuring apparatus 100 including the flexible sensor 1A, even when the sensor cable 2 is thin, the work of surrounding the electric wire 200 with the sensor cable 2 can be performed efficiently and easily. Can do.

  Moreover, when this light emission part 4A is employ | adopted, as shown in FIG. 8, when the fitting member 21 is not inserted in the fitting part 31 of the connection mechanism 3, (the fitting member 21 and the fitting part 31 are the same. When in the non-fitted state, power is automatically supplied to the light source 45 (light L is emitted to the light emitting portion 4A), and the fitting member 21 is inserted into the fitting portion 31 (fitting member) The switch 6 (switching unit) that automatically stops the supply of power to the light source 45 (stops the emission of the light L by the light emitting unit 4A) when the 21 and the fitting unit 31 are fitted). It is also possible to adopt a configuration arranged inside. According to this configuration, the base end portion 2a and the tip end portion 2b of the sensor cable 2 are connected (the fitting member 21 and the fitting portion 31 are fitted), and detection of the detected amount by the sensor cable 2 is started. When this is done, it is possible to reliably avoid the influence of noise or the like on the detection of the detected amount due to the supply of power to the light source 45 via the power line 46 disposed in the sensor cable 2. . Moreover, according to this structure, the power consumption of 1 A of flexible sensors (light source 45) can fully be reduced. It is also possible to employ a configuration including a switch that manually supplies power to the light source 45 and stops supply.

  Also in the above-described flexible sensor 1, the supply of power to the light source 41 (radiation of light L by the light emitting unit 4) and the fitting member 21 and the fitting part 31 according to the fitting state and the non-fitting state, and It is also possible to adopt a configuration including a switch that automatically stops supply (stop of emission of light L by the light emitting unit 4) and a switch that manually supplies power to the light source 41 and stops supplying it.

  In the above-described light emitting units 4 and 4A, LEDs are used as the light sources 41 and 45, but various light sources other than LEDs such as an incandescent lamp, a fluorescent lamp, a halogen lamp, and an EL lamp can be used.

  Further, the example in which the light guide 42 and the power supply line 46 are disposed inside the sensor cable 2 has been described above. However, a configuration in which the light guide 42 and the power supply line 46 are disposed outside the sensor cable 2 may be employed.

  Furthermore, the structure provided with the 2nd light emission part which radiates | emits light from the base end part 2a side of the sensor cable 2 and at least one of the connection mechanism 3 is also employable. As an example, a configuration including one or both of the light emitting portions 5a and 5b as the second light emitting portions indicated by broken lines in FIG. 1 can be employed. According to this configuration, even when the arrangement place of the electric wire 200 is dark, it is possible to reliably grasp the position of the base end portion 2a side of the sensor cable 2 and the connection mechanism 3 by the light emitted from the second light emitting portion. Therefore, the base end portion 2a and the tip end portion 2b of the sensor cable 2 can be easily connected and disconnected. In this case, it is also possible to employ a configuration including a switch that automatically or manually stops light emission and light emission by the second light emitting unit. In addition, the light emission parts 5a and 5b can also be comprised only with light sources, such as LED, and can also be provided with a light source and a light guide material.

  Moreover, as shown in FIG. 9, the structure provided with the light emission part 7 (3rd light emission part) is also employable. The light emitting portion 7 is directed from the outer peripheral surface 2c to the side in a predetermined range in the length direction of the sensor cable 2 (in this example, the entire length direction from the base end portion 2a to the tip end portion 2b). (Towards the periphery of the outer peripheral surface 2c). As an example, the light emitting unit 7 includes a light source 71 and a light guide material 72. The light source 71 is composed of, for example, an LED, is disposed in the coupling mechanism 3, and emits light by emitting light from a power source supplied via the power line of the cable 50. As one example, the light guide material 72 is formed of a flexible light guide sheet formed in a flexible sheet shape. In this case, in the light emitting portion 7, as shown in the figure, the sensor cable 2 extends over the entire region in the length direction from the proximal end portion 2 a to the distal end portion 2 b of the sensor cable 2 (almost around the entire circumference). A light guide material 72 is disposed on the outer peripheral surface 2c of the lens. In addition, the light guide material 72 guides the light from the light source 71 incident from one end (the end on the base end 2a side) to the other end (the end on the front end 2b side) and guides the light. Then, light is emitted from the surface toward the outside (that is, from the outer peripheral surface 2c of the sensor cable 2 to the side).

  Note that a configuration in which the light source 71 is disposed in the fitting member 21 may be employed instead of the above-described configuration of the light emitting unit 7 in which the light source 71 is disposed in the coupling mechanism 3. Further, the light source 41 of the light emitting unit 4 (first light emitting unit) and the light source 45 of the light emitting unit 4A are used as the light source of the light emitting unit 7 (that is, the light sources and the light emitting units of the light emitting units 4 and 4A). 7 can also be employed. Further, a configuration in which the light guide material 72 is disposed only on the outer peripheral surface 2c in a partial range (a predetermined range) in the length direction of the sensor cable 2 may be employed. In addition, the light emitting portion 7 can be configured by a plurality of light sources disposed along the length direction of the sensor cable 2 on the outer peripheral surface 2 c in a predetermined range in the length direction of the sensor cable 2. In this case, it is also possible to employ a configuration including a switch that automatically or manually stops light emission and light emission by the light emitting unit 7.

  According to the configuration provided with the light emitting portion 7, light is emitted from the outer peripheral surface 2 c of the sensor cable 2, so that the position of the sensor cable 2 can be reliably grasped even when the location of the electric wire 200 is dark. Can do. Moreover, when the other electric wire 200 is arrange | positioned adjacent to the electric wire 200 to be measured (the several electric wires 200 are complicated), it can be grasped | ascertained reliably where the sensor cable 2 passes. . Therefore, according to this configuration, the operation of surrounding the electric wire 200 with the sensor cable 2 can be performed more efficiently and more easily.

DESCRIPTION OF SYMBOLS 1,1A Flexible sensor 2 Sensor cable 2a Base end part 2b Front end part 2c Outer peripheral surface 3 Connection mechanism 4, 4A Light emission part 5a Light emission part 5b Light emission part 6 Switch 7 Light emission part 41 Light source 42 Light guide 45 Light source 46 Power supply Line 60 Measuring unit 71 Light source 72 Light guide material 100 Measuring device 200 Electric wire L Light

Claims (7)

A sensor cable that detects the amount to be detected for the measurement object in a state of being arranged so as to surround the measurement object, and a sensor cable that is attached to a proximal end portion of the sensor cable and that has a distal end portion and a proximal end portion of the sensor cable. A flexible sensor having a coupling mechanism for coupling and decoupling,
The flexible sensor provided with the 1st light emission part which radiates | emits light toward the front from the said front-end | tip part.   The first light emitting unit includes a light source disposed in the coupling mechanism, and an optical fiber disposed between the light source and the tip portion to guide light from the light source to the tip portion. The flexible sensor according to claim 1, which is configured as follows.   2. The flexible sensor according to claim 1, wherein the first light emitting unit includes a light source disposed at the tip and a power supply line that supplies power to the light source.   The flexible sensor according to any one of claims 1 to 3, further comprising a second light emitting portion that emits light from at least one of the base end side of the sensor cable and the coupling mechanism.   The flexible sensor according to any one of claims 1 to 4, further comprising a third light emitting unit that emits light from an outer peripheral surface of a predetermined range in a length direction of the sensor cable toward a side.   The first light emitting portion emits light when the distal end portion and the proximal end portion of the sensor cable are disconnected, and when the distal end portion and the proximal end portion are coupled, the The flexible sensor according to claim 1, further comprising a switching unit that stops the emission of light by the first light emitting unit.   A measuring apparatus comprising: the flexible sensor according to claim 1; and a measuring unit that measures a measured amount of the measurement target based on the detected amount detected by the flexible sensor.

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