JP5002716B2 - Device for detecting operation state of control device using IC tag - Google Patents

Description

  The present invention relates to an operation state detection device for a control device using an IC tag, and in particular, a method for recognizing the operation state of a control device such as a state of an operation switch or a switch position in a non-contact manner using an IC tag. It is about.

  In control devices equipped with mechanical switches, switches, control levers, etc., their operation status, for example, in an industrial power supply system, the open / close status of multiple switches that are switches for supplying and shutting off large power There is a cam switch mechanism as a mechanical system that holds stably (see Non-Patent Document 1). This is to stably select a predetermined position (hereinafter referred to as a notch position) corresponding to each contact of a switch (or switch) by using a cam and a spring interlocked with an operation shaft of the switch. The cam switch mechanism has a mechanism that is pulled into one of the stable positions by a spring, which not only reduces backlash and play, but also rattles. If the shaft-type rotary switch does not rotate for a long time, the problem of sticking over time due to shaft rust or oil hardening is alleviated. Such a cam switch mechanism is applied to a switch or switch of a power supply system that is installed over a long period of time.

  Including the above cam switch mechanism, the normal mechanical switch “open”, “neutral”, “closed” or the switch device operating position is indicated by the position or scale of the handle, dial, knob linked to this or The stamp can be confirmed visually.

  On the other hand, when the switch, switch or operating lever is built in the control system and installed so that the display can be confirmed systematically, it is possible to check the non-contact display with the electric remote monitor means during system operation The structure to do is known.

  Also, by incorporating an IC tag into a part or device, the IC tag reader can electromagnetically communicate with the IC tag from the outside, and information such as browsing or writing of the part or device or related ambient environment information can be obtained using the IC tag ID as a key. Communication is possible. By using this feature, the antenna of the IC tag reader is scanned and the point where the communication with the IC tag is established is detected, so that the position of the IC tag is detected as the position of the antenna when the communication is established. Can recognize the position of the IC tag.

  Patent Document 1 and Patent Document 2 describe a technique for detecting the position of an IC tag by arranging a plurality of IC tag reader antennas for communication with an IC tag in a space, and switching and scanning them. ing.

  In Patent Document 3, an IC tag to which a sensor is connected is attached to each switch (switch) used in a substation facility or the like, and input from each sensor connected to the IC tag is transferred to an IC tag reader in a non-contact manner. The technology to do is described.

  In Patent Document 4, the connection state between the antenna of the IC tag and the chip of the IC tag is opened and closed by a contact, thereby recognizing the state of the switch (open or closed) without contact via the IC tag reader ( There is a description relating to a technique in which information of an IC tag can be read out when closed.

  Patent Document 5 discloses a technique for installing or incorporating an IC tag as shown in FIG. 3A on a metal surface or the like as an IC tag incorporated in a metal object. This patent document 5 describes a countermeasure for a case where communication with an IC tag incorporated by reflection of electromagnetic waves used for communication is impossible because the IC tag mounting surface is metal, or a small-sized IC tag with low sensitivity. Measures to communicate after recovering to have been disclosed.

JP 2009-157904 A JP 2006-014110 A JP 2008-99459 A JP 2010-13210 A JP 2008-90813 A

http://www.seiko-ce.co.jp/hinmoku/seigyo/pdf/cs_common.pdf “Shinko operation switch specifications list”

  Conventional operation switches, control switches, and the like of control devices have a problem that human recognition due to misreading may occur due to visual recognition associated with reading of a display linked with the operation handle or dial. In addition, since the cam switch mechanism described in Non-Patent Document 1 is installed in the field for a long period of time, characters and symbols may become unclear or peeled off due to dust or dirt on the display portion. As examples of misreading, there are parallax misreading with a display pointed to by a handle or a dial, misreading with characters or symbols that are easily mistaken for display, misreading with display peeling or blurring. In addition, the handle or dial may be pulled out as part of safety measures to prevent erroneous operation, but there may be misreading due to a mistake in attaching the handle or dial. Furthermore, there is a problem that it is difficult to read when the handle or dial is removed.

  Next, the techniques described in Patent Document 1 and Patent Document 2 can detect the position of an IC tag in a non-contact manner, and an IC tag scanning area (an area for detecting the position of an IC tag) is relatively free. Although it can be set, the multiple antennas that supply the power to excite the IC tag are selectively switched, which makes the device large and expensive, and difficult to apply to small objects such as a single switch. was there.

  In addition, the invention described in Patent Document 3 has a feature that various information can be obtained in a non-contact manner by selecting the type of sensor. However, since the sensor is provided separately from the IC tag, the scale increases. A power source is required to operate the sensor, and there is a problem that it is difficult to apply to a small object such as a switch alone.

  Furthermore, the invention described in Patent Document 4 does not require a sensor and a power source other than the IC tag, and reading by the reader is also non-contact, but the contact serving as the sensor operates in a mechanical contact manner, In addition, this increases the mechanical scale, and there is a problem that it is difficult to apply to a small object such as a single switch. In addition, since the IC tag uses electromagnetic waves for communication, communication may be unstable or impossible when the object to be attached or its periphery is a conductor such as metal. This is a serious problem in a switch that uses a lot of metal and a metal switchboard to which the switch is attached.

  In addition, although the invention described in Patent Document 5 allows an IC tag to be installed or incorporated on a metal surface or the like, in a control device equipped with a mechanical switch or switch such as a cam switch, Sufficient consideration has not been given to making it possible to check the state without contact.

  The object of the present invention is that a plurality of switches, control switches, etc. are incorporated in a control device, and the plurality of switches are not touched during operation, inspection, maintenance, etc. without touching the handle or dial. An object of the present invention is to provide an operation state detection device for a control device using an IC tag, which can accurately and safely recognize a position and a display without contact and has a high human error reduction effect.

  An example of a representative example of the present invention is as follows. That is, an operation state detection apparatus for a control device in which a plurality of IC tags are incorporated, the plurality of IC tags arranged in association with the plurality of operation states of the control device, and positions relative to the plurality of IC tags One auxiliary antenna provided so that the relationship can be relatively changed, and one of the plurality of IC tags and the auxiliary antenna are selected on a one-to-one basis according to each operation state of the control device It is configured to communicate.

  According to the present invention, even when a switch or a control switch of a control device is incorporated in a control system and is in operation, the position of the switch or the like can be determined without touching the handle or the dial for inspection or maintenance. The related display can be recognized in a non-contact manner by electromagnetic waves, and an operation state detection device with a high effect of reducing human error caused by visual observation or the like can be provided.

The figure which shows the system structural example of the operation state detection apparatus of the control apparatus which becomes a 1st Example of this invention. The disassembled perspective view of the control apparatus provided with the operation state detection apparatus of FIG. The figure which shows the back surface of the IC tag holding panel of FIG. The figure which shows an example of the small IC tag used for a 1st Example. The figure explaining the relationship between the small IC tag in a 1st Example, a remote antenna, and an IC tag reader. Explanatory drawing of the positional relationship of a remote antenna and a small IC tag in FIG. 4A. The figure explaining the rotation restriction | limiting range at the time of using a dipole antenna for a 1st Example. Explanatory drawing of the state which moves in a rotation direction and communicates on a one-to-one basis when a monopole antenna is used in the first embodiment. The figure explaining the conditions which do not interfere with an adjacent tag in a 1st Example. The figure which shows the system structural example of the operation state detection apparatus of the control apparatus which becomes 2nd Example of this invention. The figure which shows the outline | summary of the operation state detection apparatus of the control apparatus which becomes the 3rd Example of this invention. The figure which shows the whole structure incorporating the operation state detection apparatus of the control apparatus which becomes a 5th Example of this invention. The front view and side view of the base of the operation state detection apparatus in a 5th Example. The front view and side view of the movable body of the operation state detection apparatus in a 5th Example. The figure which shows the structural example of an IC tag in a 5th Example. The figure which shows the relationship between an IC tag and a detection electrode in a 5th Example. The figure which shows the relationship between an IC tag and a detection electrode in a comparative example. The figure which shows the relationship between a base and a movable body corresponding to the closed state of the circuit terminal of a control apparatus in a 5th Example. The figure which shows the relationship between a base and a movable body corresponding to the intermediate state of the circuit terminal of a control apparatus in a 5th Example. The figure which shows the relationship between a base and a movable body corresponding to the open state of the circuit terminal of a control apparatus in a 5th Example. The figure which shows each operation state of the circuit terminal of a control apparatus, and the positional relationship of a movable body in a 5th Example.

  According to a typical embodiment of the present invention, there is provided a suitable auxiliary antenna in which a monopole antenna or a dipole antenna as an auxiliary antenna is connected to a rotation axis of a switch, and an arm is extended to one or both sides around the axis. It is formed. The small tags are arranged so that they come close to each other immediately below the auxiliary antenna that rotates in conjunction with the rotation of the switch. By doing in this way, the small tag directly under the auxiliary antenna extending around the rotation axis can be communicated on a one-to-one basis. Information of the corresponding IC tag (different information is set for each arranged IC tag) is acquired by the IC tag reader by communication, and the operation position of the switch can be recognized from the acquired information.

  If a monopole antenna is adopted as an auxiliary antenna, the small tag placement range can be expanded to 360 degrees. One end of the monopole antenna is connected to the rotating shaft of the rotary switch, the antenna extends in the radial direction of the rotating shaft, and the tag is disposed immediately below the antenna. The small tags are concentrically installed in a plane perpendicular to the rotation axis. By doing so, even when the arrangement angle is 360 degrees, one small tag is arranged directly under the antenna.

  Note that a monopole antenna requires a wider conductor called a ground or an earth because one arm is lost compared to a dipole antenna. This gland can be replaced with a metal plate on which a small tag is arranged. On the other hand, since the rotation axis is parallel to the radiation direction of radio waves, even if it is made of metal, it is ignored for the radiation of electromagnetic waves unless it has a predetermined dimension of the monopole antenna. The axial length of the rotation axis of the metal projecting vertically from the metal surface on which the small tag is arranged is just a monopole dimension (approximately the length of λ / 4, where λ is the communication electromagnetic wave or the electromagnetic wave wavelength of the small tag to be installed. ), The intensity of electromagnetic waves increases and the radiation range expands.

  A dipole antenna system, that is, an antenna extending in opposite directions in the form of both arms formed by fixing the center portion of a dipole antenna having a total length of approximately λ / 2 to a rotating shaft may be employed. In a dipole antenna, one small tag can be placed directly under one arm, that is, one side of one auxiliary antenna if the placement of the small tag is within the range of 0 to 180 degrees on the circumference, but 180 degrees or more and less than 360 degrees If it is installed within the range of up to this angle, another small tag will be placed directly under the other arm. As described above, when a dipole antenna is selected as the auxiliary antenna, two small tags are inserted immediately below the antenna, causing interference and causing a range where one-to-one identification cannot be performed. Accordingly, the one-to-one selection range is an angle range from 0 degrees to less than 180 degrees of the switch shaft, and the installation range of the small tag needs to be narrowed to half of the entire circumference.

As described above, in the present invention, the size of the internal pointer is set to the length of the approximate monopole antenna or the approximate dipole antenna, and it is also used as an auxiliary antenna that makes a small tag having no practical sensitivity alone high sensitivity. One tag is arranged on the other hand, and a configuration capable of one-to-one communication is provided so as not to interfere with an adjacent small tag in conjunction with the shaft rotation of the operating device.
Hereinafter, specific examples of the present invention will be described. The relationship between the antenna width of the auxiliary antenna and the width of the small tag, as well as the pitch width of the arrangement of the small tag is also described in the embodiment.

Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a configuration of a cam switch suitable for realizing an operation state detecting device for a control device using an IC tag of the present invention. FIG. 2A is a perspective exploded view showing the configuration of the cam switch of FIG. FIG. 2B shows the back of the IC tag holding panel of FIG. The operation state detection device of this embodiment is configured to detect the operation state of the cam switch 1 that is an electrical switch. The cam switch 1 includes a cam switch body 12 and drives a switch mechanism (see Non-Patent Document 1 for details) provided therein as a rotational motion via a switch shaft (rotary shaft) 11. For this purpose, a handle 17 is attached to the switch shaft 11. OO ′ represents the rotation center axis of the switch shaft 11. The operating state of the cam switch body 12 is visually recognized by a scale or display (not shown in the drawing) stamped on the non-metallic visual panel 20. A remote antenna (auxiliary antenna) 15 is attached to a shaft 11 extending from the cam switch body 12 with a spacer 16 for position adjustment sandwiched between the viewing panel 20. Thereby, the remote antenna (auxiliary antenna) 15 rotates simultaneously with the shaft 11. FIG. 1 shows an example in which a monopole antenna is employed as the remote antenna 15. The remote antenna 15 is electromagnetically connected to the shaft 11 in order to operate as a dipole or monopole antenna. That is, one end of the remote antenna 15 (monopole antenna) is electromagnetically connected to the metal back plate 13 via the shaft 11 to ensure ground or earth.

  The remote antenna 15 rotates in a circular space 141 dug in the IC tag holding panel 14, and a small IC tag 10 for detecting the position of the remote antenna 15 is provided in the concave portion 142 on the back side of the shaft 11. A plurality of them are installed as needed on the same circumference centered on the axis. That is, as shown in FIG. 2B, a plurality of recesses 142 for storing and holding the small IC tag 10 are provided on the same circumference on the back side of the IC tag holding panel 14. The cam switch main body 12, the IC tag holding panel 14, and the handle 17 are made of an insulating material such as a resin material. In an actual apparatus, a switchboard panel (not shown) is positioned between the metal back plate 13 and the cam switch body 12. In order to prevent malfunction, the handle 17 may be removed after being driven once until it is driven next time.

  With the small IC tag 10 and the remote antenna 15 in place, the metal back plate 13, the IC tag holding panel 14, and the viewing panel 20 each have a hole in the center, and an outer peripheral portion. Is fixed to the cam switch body 12 with a screw 23. In other words, each small IC tag 10 is sandwiched between the IC tag holding panel 14 and the metal back plate 13 and fixed and held at the predetermined position, while the remote antenna 15 is fixed to the shaft 11 and the IC tag holding panel. 14 spaces 141 are rotatably held. Reference numeral 18 denotes an antenna portion of the IC tag reader 19, and reference numeral 22 denotes a state recognition processing unit.

  FIG. 3 shows an example of the small tag 10 arranged on the metal surface (back plate 13 in this embodiment). The small tag 10 is disposed such that the side opposite to the radio wave radiation direction (the lower side in FIG. 3) is in contact with the metal back plate 13. The size D of the small tag 10 is approximately 1/10 or less of the wavelength of the electromagnetic wave used by the IC tag for communication. For example, a microwave band IC tag using a frequency of 2.45 GHz has a size of 12 mm or less. A small tag in this state alone does not have sufficient sensitivity, and normally cannot communicate with an IC tag reader. The small tag 10 includes an RFID tag 110 connected to the IC chip 100, a loop antenna 120 outside the RFID tag 110, and the like. Needless to say, the configuration of the small tag 10 is not limited to this example.

  FIG. 4A is a diagram for explaining the relationship between a small IC tag, a remote antenna, and an IC tag reader. The IC tag 10 having the small IC tag ID code communicates with the IC tag reader 19 via the remote antenna 15. The IC tag 10 is a so-called passive tag that does not have a built-in power supply. The electromagnetic wave received by the antenna from the IC tag reader 19 is converted into a DC power supply by the rectifier 102 and operates as an energy source, and an ID code held in the signal processing unit 103. Accordingly, the electromagnetic wave modulated by the modulator 101 is transmitted from the antenna. The IC tag reader 19 has a transmitter 191 and a receiver 192 connected to the antenna 18 via a circulator 193.

  Here, when the antenna part 18 of the IC tag reader 19 is directed to the cam switch 1 to emit electromagnetic waves 21 and communication is performed, a signal from only the IC tag 10 at the position of the remote antenna 15 can be acquired. The signal here is a high-frequency signal obtained by modulating information such as a unique ID code for each IC tag. The signal received by the antenna unit 18 is sent to the state recognition processing unit 22 connected to the IC tag reader 19. In the state recognition processing unit 22, the high frequency is converted into information such as a unique ID code for each original IC tag by the demodulator / decoder 22A. The information is sent to the ID code map information comparator 22B. In the ID code map information comparator 22B, a large number of ID codes of each IC tag and IC tags having the ID code are installed on the switchboard (or in a facility such as a factory where the switchboard is installed). Map information that combines which cam switch (1a to 1n), which position of the corresponding cam switch is mounted, and which operating state of the cam switch corresponds to this is set in advance. . If the ID code is received by comparison with the map information, the corresponding cam switch is identified, and the operating state of the cam switch can be recognized.

  The status storage unit 22C stores the ID code of the corresponding cam switch and the operating state of the cam switch for each cam switch. In the set target value storage unit 22D, the operation state of each cam switch when set correctly is set in advance. By comparing the contents of the status storage unit 22C with the contents of the set target value storage unit 22D by the status determination unit 22E, it is determined whether the status of each cam switch is correct. The result is output by an interface unit 22F such as a display.

  FIG. 4B is an explanatory diagram of the positional relationship between the remote antenna and the small IC tag in FIG. 4A. In FIG. 4B, two IC tags 10-1 and 10-2 are arranged on the metal surface of the IC tag of FIG. The IC tag 10 has a relatively short receiving distance and cannot communicate with the IC tag reader 19. However, the IC tag 10-1 in which the remote antenna (auxiliary antenna) 15 is located immediately above is in a high sensitivity state due to the interaction with the remote antenna 15 and can sufficiently communicate. When the remote antenna 15 rotates and moves directly above the IC tag 10-2, the IC tag 10-2 newly starts communication.

  FIG. 5 is a diagram illustrating the rotation limit range when the dipole antenna 150 is used as a remote antenna. When the remote antenna 150 that performs the dipole antenna operation rotates and there is no IC tag immediately below it, no communication is established with any IC tag tag. Therefore, the IC tag must be placed at one of the positions positioned by the notch mechanism of the cam switch 12. However, when the remote antenna 150 performing the dipole antenna operation is rotated, it should be arranged so that only one IC tag is located immediately below. FIG. 5 shows an arrangement on a single circle 50 having the same center as the rotation axis 11 for positioning only one IC tag 10-1, 10-2,. Then, it is explained that the IC tag should not be attached to the lower position in the figure, for example, the position 10-5. These locations are angled areas where the two tags enter under the remote antenna. For example, the IC tag 10-1 and the IC tag 10-5 are located immediately below the remote antenna. Since the remote antenna 15 communicates with two IC tags, the notch position is mixed and the position cannot be specified. However, when the notch position is within 180 degrees, it is not necessary to arrange the IC tag up to the facing position, for example, the position of 10-5, and no problem occurs.

  Further, if the viewing panel 20 is a transparent plate, the remote antenna (auxiliary antenna) 15 inside thereof can also be used as a built-in pointer, and the position of the switch, that is, the notch position is easy from the position of the built-in pointer. I understand. As a result, even if the handle or dial is pulled out, a built-in pointer having a structure that cannot be pulled out easily can be added as means for notifying the outside of the notch position. Since the built-in pointer is connected to the shaft of the operation switch or switch, even if the handle or dial is pulled out, the built-in pointer can function as a structure indicating the notch position.

  According to the present embodiment, even when a switch or a control switch of a control device is incorporated in a control system and is in operation, the switch position and display of the control device can be displayed on the electromagnetic wave without touching the handle or dial for inspection or maintenance. Thus, non-contact recognition is possible, and an operation state detection device having a high effect of reducing human errors caused by visual observation or the like can be provided.

  In addition, by adopting a so-called passive tag that does not have a built-in power supply and combining this with a remote antenna that is linked to the operating state of the cam switch, the overall configuration becomes simple and can be easily applied to small objects. In addition, the cost can be reduced and the maintenance can be simplified.

  Next, a case where the monopole antenna 15 is employed as a remote antenna and moves in the rotation direction to perform one-to-one communication will be described with reference to FIG. In this case, the IC tag 10 may be installed at all angular positions on the concentric circle 50. The remote antenna 15 is realized by a half of a dipole (approximately λ / 4), that is, a monopole antenna. The remote antenna 15 that operates as a monopole antenna has an arm extending from the center of the rotation axis extending in only one direction. For example, when the IC tag 10-1 is positioned directly below the remote antenna 15, the remote antenna 15 is 180 degrees opposite. The side IC tag 10-5 is not located directly below the remote antenna 15.

Next, the concentric orbit where the IC tag 10 is installed in the first embodiment will be described. In FIG. 7, it is shown that the concentric orbit to be installed may be either the region of the remote antenna tip a, the region of the remote antenna daytime b, or the region of the remote antenna root c. To select the trajectory, select the outer trajectory to increase the number of tags. Depending on the type and orientation of the tag, there may be a maximum sensitivity in the c orbit, a maximum sensitivity in the b orbit, and a maximum sensitivity in the a orbit. This shows that adjustment can be made to achieve practical sensitivity.
(By the way, the voltage-operated tag has the maximum sensitivity at the maximum point of the voltage standing wave (auxiliary antenna tip), that is, the region a, and the current-operated tag has the maximum current point (axis connection point of the auxiliary antenna), that is, c The sensitivity of region b may be improved by a synergistic effect regardless of voltage type or current type.

Further, in FIG. 7, the width of the remote antenna 15 or 150 is defined. Using the IC tag width W1, the remote antenna width (correctly, the width of the remote antenna at the position overlapping the IC tag) W2, and the distance W3 between adjacent IC tags, the conditions for recognizing the IC tag individually are:
W3> W1
W2> W1
W3> W2
It is.

Next, a second embodiment of the present invention will be described with reference to FIG.
The present invention is not limited to the operation of the control device by rotation, and the operation of the control device is not limited to the rotation, and the linear movement or other regular movement of the regular position along a predetermined locus is possible. Anything that accompanies is equally applicable. For example, as shown in FIG. 8, a plurality of small tags 10-1, 10-2, 10-n are arranged on a straight line AA ′, and the switch mechanism is movable linearly along the straight line AA ′. The remote antenna 80 may be provided on the reference numeral 84, and the position of the linearly movable switch mechanism 84 can be recognized based on the positional relationship between the remote antenna 80 and each small tag. Thus, the present invention is not limited only to the detection of the state of a rotary operation switch such as a cam switch. In addition, when the switch or the like has a notch position and the operation state of the switch or the like cannot be accurately recognized due to an error or the like, the state recognition processing unit 22 performs congestion control and accurately detects the position. .

Next, a third embodiment of the present invention will be described with reference to FIG.
If the relative movement and alignment between the IC tag and the remote antenna in conjunction with the shaft 11 can be achieved, state recognition is achieved, so the rotational relationship between the IC tag and the remote antenna or the linear movable relationship can be achieved. It may be reversed. That is, as shown in FIG. 9, a disk-shaped holder 92 is connected to the shaft 11, and a plurality of IC tags 10-1 to 10-n are fixed on the disk-shaped holder 92. Further, a remote antenna 90 is provided at a fixed position that is not synchronized with the disk-shaped holder 92. Thereby, each IC tag 10 moves in conjunction with the rotation of the shaft 11, and only the information from, for example, the IC tag 10-n that is aligned with the remote antenna 90 at the fixed position is detected by the IC tag reader. . In this case, since the remote antenna 90 does not rotate, it is relatively easy to apply a dipole antenna that is more sensitive than a monopole antenna.

The present invention is not limited to the cam switch described above. For example, if the cam switch body 12 of the first embodiment is replaced with a mechanical mechanism, for example, a door locking mechanism, it can be applied to detect the state of the door locking mechanism. Further, if the cam switch body 12 is replaced with a valve mechanism, it can be applied to detect the state of the opening of a valve that controls the flow rate of fluid. As described above, the configuration of the present invention is not limited to only the state detection of the electrical switch, but can be widely applied to operation state detection devices for various control devices using IC tags.
Furthermore, according to the present invention, even if the mechanical switch or the control switch is in the state of a component housed in a packaging material such as glass or plastic that allows electromagnetic waves to pass alone, the switch position information (control The operation status of the device can be confirmed.

  Alternatively, by using the remote antenna as a built-in pointer, even if the handle or dial is pulled out of the switch or control switch for safety, the built-in pointer that can check the notch position information can be checked without contact. I can do it.

  Furthermore, in a switch or control switch built in an IC tag, a unique ID for identifying the mounting position is placed in the IC tag, so that the serial number and manufacturing information of the switch and control switch can be managed solidly. Is also possible.

  Next, a fifth embodiment in which the present invention is applied to an operation state detecting device for a control device having a cutoff switch group will be described with reference to FIGS.

  FIG. 10 is a diagram illustrating an overall configuration incorporating an operation state detection device for a control device according to the present embodiment. A present Example is related with the operation state detection apparatus of the control apparatus employ | adopted for the cutoff switch system group of a high voltage apparatus, for example.

  One base 210 and one movable body 230 constitute a set of switch units 200, and a plurality of sets of switch units are arranged in a direction (Y in the figure) perpendicular to the moving direction (z-axis direction in the figure). Are arranged in a row and at the same height along the axial direction) to form a cutoff switch group (200-1 to 200-n) of the cutoff switch system, and circuit terminals (400, 400) of the control devices of each switch unit 600) is configured to open and close between the control circuit 300 and the relay circuit 500 that controls the high-voltage power supply circuit breaker and the like of the main circuit 700 (1-n) of each controlled device unique to the switch system. ing. Whether the base 210 is in a plurality of operating states of the control device, that is, a state in which, for example, the controller 300 and the relay 500 connected to the circuit terminals 400 and 600 are electrically connected or disconnected. A movable body 230 having a plurality of IC tags arranged in association with each other and having one auxiliary antenna is configured such that the positional relationship can be relatively changed with respect to the plurality of IC tags on the base 210. . Each operation state of the movable body 230 that controls whether the function of the main circuit 700 of the controlled device is utilized (ON) or invalidated (OFF), for example, the state where the circuit body 400 and 600 are disconnected by pulling up the movable body 230 That is, it corresponds to each state of the invalid (off) state of the function of the main circuit 700, or the state where the movable body 230 is pushed in and the circuit terminals 400 and 600 are connected, that is, the valid (on) state of the function of the main circuit 700. Any one of the plurality of IC tags on the base 210 and the auxiliary antenna can be selectively communicated on a one-to-one basis. The operation state of each switch unit 200 can be read from the auxiliary antenna of the movable body 230 in a non-contact manner by the reader / writer 19 in the same manner as in the embodiment described above.

  In addition, there are many cases where the types of controlled devices are various, and the number of cutoff switch groups (200-1 to 200-n) for controlling the power source of the main circuit 700 is also increased, but operability is considered. Consequently, a large number of cut-off switch groups are collected in a small space as a whole.

  In FIG. 10, most of the switch units of the cut-off switch group are in the lowest position (first position) corresponding to the connection state of the circuit terminals 400 and 600 when the circuit terminal of the control device is closed, that is, pushed. The unit 200-m is in the open state of the circuit terminals of the control device, that is, in the pulled state, the circuit terminals 400 and 600 being disconnected (second position, = completely opened or removed). Further, the switch unit can be held at an intermediate position (third position) between the first and second positions.

  Such an operation state of the switch unit can be grasped to some extent by visual check by confirming the height and removal of each switch unit. However, when the number of switch units increases, the control contents vary widely, and the switch units open and close in various ways, it is necessary to more accurately grasp the state of operation and ensure the safety of work.

  In this embodiment, a plurality of IC tags are incorporated in each switch unit, and a configuration is adopted in which the positions of the plurality of IC tags installed in a small space are not erroneously detected. Accurate information on operation status can be recognized by electromagnetic waves without contact. Thereby, the operation state detection apparatus with a high reduction effect of the human error resulting from visual observation etc. can be provided.

  Next, the configuration of the switch unit 200 will be described in more detail with reference to FIG. 11 (FIGS. 11A and 11B).

  11A is a front view of the base 210, and FIG. 11A is a side view of the base. FIG. 11B is a front view of the movable body 230, and FIG. 11B is a side view of the movable body 230.

  As shown in FIG. 11A, the base 210 has a resin mounting substrate portion 211 and a back plate portion 212, and is integrally provided so as to protrude from the back plate portion, and the movable body 230 is vertically aligned (AA ′). It has a guide portion 213 that slides in the direction. Further, a guide groove 214 having the same height as the back plate portion is formed on the inner side of the guide portion 213, and a plurality of, three in this case, are formed by the resin protrusions 215 provided at the center of the guide groove 214. Each IC tag 10 (10-1, 10-2, 10-3) is associated with the open / closed state of the circuit terminals 400 and 600 of the control device in the AA ′ direction along the moving surface of the guide portion 213. Is retained.

  The guide portion 213 guides the movable body 230 that moves up and down so as to maintain a predetermined distance from each IC tag 10. The movable body 230 is fitted into the guide portion 213 of the base 210 from the lateral direction (from the front in the front view of FIG. 11A (from the front) and from the left side in the side view of FIG. 11A). It is possible to move up and down along.

  The guide portion 213 has a thin-walled structure, and the upper inner surface has irregularities, and convex portions that engage with the irregularities are formed on the side surfaces of the movable body 230, thereby causing the movable body 230 to move to a predetermined operation position of the guide portion 213. It has the function to hold.

  Furthermore, the base 210 is provided with a pair of circuit terminals 216 and 218, and these circuit terminals 216 and 218 are fixed to the mounting substrate portion 211 of the base 210 via screws 217 and 219, respectively. The circuit terminals 400 and 600 are electrically connected. The pair of circuit terminals 216 and 218 are electrically opened and closed by a movable body short-circuit plate 234. The back plate portion 212 has an uneven portion that engages with the back plate portion of the adjacent switch unit. Reference numeral 221 denotes a hole through which a screw (not shown) is passed for fixing and integrating a plurality of switch units 200 as one switch unit group. Reference numeral 222 denotes a seat portion provided on the mounting substrate portion 211. The pair of circuit terminals 400 and 600 are electrically opened and closed by a short circuit plate 234. In addition, a protrusion 223 provided so as to protrude laterally from the extension 220 extending upward from the back plate portion 212 functions as a downward stopper of the base 210 with respect to the movable body 230 and also serves as a back of an adjacent switch unit. It has a function of engaging and positioning with a hole provided on the back surface of the plate portion. Further, for example, each IC tag 10 and a protrusion 215 that holds the IC tag 10 are integrally formed so as to hang from the protrusion 223 of the base 210. As a result, there is a space around the protrusion 215 of the base 210 for the movable body 230 arranged so as to surround the protrusion 215 to move up and down. Note that the structure in which each IC tag 10 and the protrusion 215 are supported by the base 210 is not limited to the form hanging from the protrusion 223, and each IC tag 10 and the protrusion 215 are not hindered from moving up and down the movable body 230. It goes without saying that other structures may be used as long as the tag 10 and the protrusion 215 are fixed to the base 210.

  On the other hand, as shown in FIG. 11B, the movable body 230 has an auxiliary antenna 80 (80A, 80B) embedded in the upper part of the resin main body 235, and transmission lines 232, 233 electrically connected to the auxiliary antenna, Further, a pair of detection electrodes 231 (231A, 231B) is electrically connected to the transmission lines 232, 233.

  Since each IC tag is electromagnetically coupled to a pair of detection electrodes 231A and 231B, the detection electrodes are connected by conductive arms 237 so that the electrode antennas (t1, t2) of the IC tag are sandwiched between the detection electrodes (231A, 231B). Hold. A pin (not shown) is provided on the upper part of the resin main body 235, and the short-circuit plate 234 is held in the recess of the resin main body 235 with this pin as a support shaft. Reference numeral 236 denotes a stepped portion that functions as a downward stopper for the base 210 with respect to the movable body 230.

  As will be described later, each IC tag 10 is fixed to the base 210 and the protruding portion 215 such that the central axis between the pair of electrodes is in a positional relationship parallel to the central axis of the transmission lines 232 and 233. Yes. Therefore, the movable body 230 fitted in the guide portion 213 of the base 210 includes transmission lines 232 and 233 and detection electrodes (231A and 231B) at positions rotated by 90 degrees in the circumferential direction. The IC tag 10 moves up and down along the guide portion 213 in a state of being arranged so as to surround the periphery of the protrusion portion 215 that holds the IC tag 10.

  The auxiliary antenna 80 (80A, 80B) of the movable body 230 is preferably a dipole antenna based on a half wavelength. The transmission lines 232 and 233 are connected to the approximate center of the auxiliary antenna 80 and have a function of feeding electromagnetic waves. A monopole antenna may be used.

  As shown in FIG. 11C, the IC tag 10 has a pair of electrode-like antennas t1 and t2 across the central axis O-O ′. Other details of the IC tag 10 are as described in the previous embodiment.

  12A shows a case where the central axis OO ′ of the IC tag 10 is in an arrangement relationship parallel to a straight line connecting the transmission lines 232 and 233 in the cross section of the transmission line. The high-frequency magnetic fluxes φ1 and φ2 induced in 233 are orthogonal to the electrode antennas t1 and t2 of the IC tag and are in positions where the magnetic flux is prevented from entering. FIG. 12A shows a state in which the detection electrode 231A and the electrode antenna t1 of the IC tag face each other, and the detection electrode 231B and the antenna t2 face each other and are electromagnetically coupled. In FIG. 5B, the straight line connecting the transmission lines 232 and 233 overlaps or is parallel to the central axis O-O ′ of the IC tag 10. The central axis OO ′ and the axis passing through the electrode antennas t1 and t2 of the IC tag sandwiched between the detection electrodes are orthogonal to each other, that is, at a position rotated 90 degrees from the transmission lines 232 and 233. As described above, the detection electrodes 231 </ b> A and 231 </ b> B are disposed via the conductive arm 237.

  When the pair of electrode antennas t1 and t2 of the IC tag 10 are separated from the detection electrode 231, the center axis OO ′ connects the transmission lines 232 and 233 as shown in FIG. 12A (A). The position is parallel to the line. That is, the magnetic fluxes φ1 and φ2 generated by the high frequency current flowing through the transmission lines 232 and 233 and the IC tag 10 are arranged so as not to be electromagnetically coupled. Also, as shown in FIG. 12A (B), when the IC tag 10 enters the detection electrode 231, the magnetic fluxes φ1 and φ2 of the transmission lines 232 and 233 and the IC tag 10 are connected to the detection electrode 231 and the transmission line. It arrange | positions so that it may electromagnetically couple through. As described above, according to the position of the movable body 230, any one of the plurality of IC tags and the auxiliary antenna can selectively communicate with each other one by one through the detection electrode and the transmission line.

  FIG. 12B is a comparative example, in which the IC tag 10 is positioned so that the central axis OO ′ between the pair of electrode antennas t1 and t2 is perpendicular to the line connecting the transmission lines 232 and 233. The case where it is fixed to the base is shown. When the direction of the pair of electrode antennas t1 and t2 of the IC tag 10 is in such a relationship, the magnetic fluxes φ1 and φ2 generated by the high-frequency current flowing through the transmission lines 232 and 233 and the IC tag 10 are directly electromagnetically coupled. Misleading detection is likely. In other words, a mechanism is constructed in which any one IC tag 10 entering the detection electrodes 231A and 231B connected to the conductive arm 237 is reliably detected, and the IC tags 10 in other locations are not detected.

  12A and FIG. 12B, the dot marks on the circles in the cross section of the transmission line 232 indicate the direction in which the direction of the high-frequency current emerges from the plane of the drawing. Further, the symbol X in the circle of the cross section of the power transmission line 233 in the figure indicates the direction in which the current direction is from the paper surface to the back surface.

  FIG. 13 (FIGS. 13A to 13C) shows in more detail the relationship between the base 210 and the movable body 230 corresponding to each of the intermediate and open states when the circuit terminal of the control device is closed.

  In FIG. 13A (a), this corresponds to the closed state of the circuit terminal of the control device, the movable body 230 of the switch unit is at the lowest position with respect to the base 210, and the pair of circuit terminals 400 and 600 are connected by the short-circuit plate 234. It is in an electrically closed state. At this time, as shown in FIG. 13A (b), the detection electrodes 231 (231A, 231B) electrically connected to the auxiliary antenna 80 (80A, 80B) are a pair of electrodes sandwiching the IC tag 10-1. The antennas t1 and t2 are opposed to each other. That is, as shown in FIG. 12A (B), the IC tag 10-1 is in the detection electrode 231. On the other hand, the detection electrodes 231 do not face the IC tags 10-2 and 10-3, and are in the state shown in FIG. Thereby, the auxiliary antenna 80 can accurately detect the closed state of the circuit terminal of the control device.

  Next, in FIG. 13B (a), it corresponds to the middle between the closed state and the fully opened state of the circuit terminal of the control device, and the movable body 230 of the switch unit is at an intermediate position with respect to the base 210, and a pair of circuit terminals The short-circuit plate 234 is separated from 400 and 600 and is electrically released. At this time, as shown in FIG. 13B (b), the detection electrode 231 electrically connected to the auxiliary antenna 80 faces the pair of electrodes t1 and t2 of the IC tag 10-2. That is, as shown in FIG. 12A (B), the IC tag 10-2 is in the detection electrode 231. On the other hand, the detection electrodes 231 do not face the IC tags 10-1 and 10-3, and are in the state shown in FIG. Thereby, the auxiliary antenna 80 can accurately detect the intermediate state of the circuit terminals of the control device.

  Further, in FIG. 13C, this corresponds to the case where the circuit terminal of the control device is in the fully open state, and the movable body 230 of the switch unit is at the uppermost position with respect to the base 210, 234 leaves and is in a fully electrically released state. At this time, the detection electrode 231 electrically connected to the auxiliary antenna 80 faces the pair of electrode antennas t1 and t2 of the IC tag 10-3. That is, as shown in FIG. 12A (B), the IC tag 10-3 is in the detection electrode 231. On the other hand, the detection electrodes 231 do not face the IC tags 10-1 and 10-2, and are in the state shown in FIG. Thereby, the auxiliary antenna 80 can accurately detect the open state of the circuit terminal of the control device. Although the number of IC tags installed in the A-A ′ direction of the base 210 varies depending on the use and control form of the control device, it is preferable to have at least two IC tags.

  FIG. 14 shows each operation state of the circuit terminal of the control device and the positional relationship of the movable body 230. The movable body 230 of each switch unit is in the lowest position (= h1) in the closed state of the circuit terminal of the corresponding control device with respect to the base 210, and is in the intermediate position (= h2) in the intermediate open state. It is in the uppermost position (= h3) in the fully open state of the circuit terminals of the device.

  In the present embodiment, as described above, by adopting a configuration that does not erroneously detect the positions of a plurality of these IC tags installed in a small space, accurate information on the position of each switch unit and the operation state is obtained. Recognized without contact by electromagnetic waves. As an example, the size of one switch unit 200 is about 4.5 cm in width (X axis), about 5.5 cm in height (Z axis), and about 1.5 cm in depth (Y axis). The height (Z axis) of the main body 235 of 230 is about 3 cm. A plurality of these switches are arranged adjacent to each other at the same height in the Y-axis direction. For example, even when the switch unit 200 group is composed of 10 switch units, the depth is about 15 cm. For example, three IC tags are built in one switch unit, and the height is set in a range of about 3 cm.

  According to the present embodiment, in each switch unit, each IC tag 10 (10-1, 10-2, 10-3) is sandwiched between a pair of detection electrodes thereof and electromagnetically coupled. Communication can be performed by the auxiliary antenna 80 via the transmission path to which this is connected. Therefore, even if the interval in the height direction (Z direction) of each IC tag 10 is narrow as described above, the interval in the horizontal direction (Y direction) of the IC tags 10 of the adjacent switch units is also reduced. Even if it is narrow, no false detection occurs.

  As described above, according to this embodiment, even when a large number of control switches such as switches and control switches of a control device are incorporated in the control system and in operation, the movable body is touched for inspection or maintenance. In addition, it is possible to provide an operation state detection device that can recognize the positions of the switches and related displays and the related display in a non-contact manner using electromagnetic waves and has a high human error reduction effect caused by visual observation. According to the present embodiment, for example, when a maintenance switch operation for various high-voltage devices is performed by controlling the cut-off switch group, for example, an electric shock accident due to an erroneous operation can be reliably prevented.

DESCRIPTION OF SYMBOLS 1 ... Cam switch, 10 ... IC tag, 11 ... Switch shaft (rotary shaft), 12 ... Cam switch main-body part, 13 ... Metal back plate, 14 ... IC tag holding panel, 15 ... Remote antenna (auxiliary antenna), DESCRIPTION OF SYMBOLS 16 ... Spacer for position adjustment, 17 ... Handle, 18 ... Antenna part, 19 ... IC tag reader, 20 ... Visual panel, 21 ... Radio wave, 22 ... State recognition processing unit, 80 ... Auxiliary antenna, 200 ... Switch unit, 210 DESCRIPTION OF SYMBOLS ... Base, 230 ... Movable body, 231 ... Detection electrode, 232 ... Transmission line, 233 ... Transmission line, 237 ... Arm, 300 ... Control circuit, 400 ... Circuit terminal of control equipment, 500 ... Relay circuit, 600 ... Control equipment Circuit terminal, 700... Main circuit of controlled device.

Claims (16)

An operation state detection device for a control device incorporating a plurality of IC tags,
A plurality of IC tags arranged in association with a plurality of operation states of the control device;
One auxiliary antenna provided so that the positional relationship can be relatively changed with respect to the plurality of IC tags,
Control using an IC tag, wherein one of the plurality of IC tags and the auxiliary antenna are selectively communicated in a one-to-one correspondence according to each operation state of the control device Device operating state detection device. In claim 1,
The plurality of IC tags are fixedly arranged at positions associated with the plurality of operation states of the control device on the same circumference around the axis of the rotation shaft that rotates according to the operation state of the control device. And
An operation state detecting device for a control device using an IC tag, wherein the one auxiliary antenna is fixed on the rotating shaft so as to be rotatable at a position facing the plurality of IC tags. In claim 1,
The plurality of IC tags are fixed at positions associated with a plurality of operation states of the control device on the same circumference of a rotating plate that rotates according to the operation state of the control device,
The operation state of the control device using the IC tag is characterized in that the one auxiliary antenna is fixed so as to face any one of the IC tags as the plurality of IC tags rotate. apparatus. In claim 1,
The operation of the control device involves a regular position movement along a predetermined trajectory,
Either one of the plurality of IC tags or the one auxiliary antenna is fixedly arranged at a position along the locus, and one of the plurality of IC tags or the one auxiliary antenna is located on the locus. An operation state detecting device for a control device using an IC tag, which is fixedly arranged on a member that moves along the same. In claim 2,
An operation state detection device for a control device using an IC tag, wherein the auxiliary antenna also serves as a built-in pointer indicating an operation state of the control device. In claim 2,
An operation state detection device for a control device using an IC tag, wherein the auxiliary antenna is a monopole antenna. In claim 2,
The rotating shaft extends in one direction from the main body of the control device,
A metal back plate, an IC tag holding panel, and a visual panel arranged around the axis of the rotating shaft are fixed to the main body of the control device,
The plurality of IC tags are fixed on the IC tag holding panel on the metal back plate side, and the auxiliary antenna is rotatably arranged in a space in the IC tag holding panel on the viewing panel side,
One end of the auxiliary antenna is electromagnetically connected to the metal back plate via the rotating shaft,
The visual panel is fixed to the front surface of the auxiliary antenna,
An operation state detecting device for a control device using an IC tag, wherein a handle is detachably attached to the rotary shaft on the front surface of the viewing panel. In claim 7,
An operation state detecting device for a control device using an IC tag, wherein the visual panel is made of a transparent member. In claim 7,
An operation state detecting device for a control device using an IC tag, wherein the control device is a cam switch mechanism for power supply / cutoff. In claim 9,
An operation state detection device for a control device using an IC tag, wherein manufacturing information indicating a switch system switch and a switch system relationship is recorded in advance on the plurality of IC tags. On the base, in association with the operation state of the control device, a plurality of IC tags arranged at predetermined intervals on a straight line,
A movable body whose positional relationship with respect to each IC tag can be relatively changed along the straight line;
An auxiliary antenna and a detection electrode provided on the movable body,
The movable body is
A transmission line electrically connected to the auxiliary antenna and extending in the linear direction;
A conductive arm that extends in a direction perpendicular to the straight line from the transmission line and holds the detection electrode at a position where it can be electromagnetically coupled to the IC tag;
According to the position of the movable body, any one of the plurality of IC tags and the auxiliary antenna are configured to be able to selectively communicate one-on-one via the detection electrode and the transmission line. A control device operation state detection device using a characteristic IC tag. In claim 11,
The auxiliary antenna is a dipole antenna based on a half wavelength;
The transmission line is connected to substantially the center of the auxiliary antenna, and has a function of feeding electromagnetic waves from the auxiliary antenna to each IC tag. An operation state detecting device for a control device using an IC tag. In claim 12,
The transmission line is
An operation state detecting device for a control device using an IC tag, wherein the device is a balanced two-wire transmission line extending in the linear direction. In claim 13,
An operation state detection device for a control device using an IC tag, wherein the detection electrode is held by the arm so as to sandwich the IC tag selectively communicated one-to-one and to be electromagnetically coupled. In claim 11,
The movable body has a short-circuit plate,
The base includes a guide portion that guides the movable body in the linear direction, and a circuit terminal of the control device that is electrically opened and closed by a short-circuit plate of the movable body,
The apparatus for detecting an operation state of a control device using an IC tag, wherein the plurality of IC tags are respectively arranged along the guide portion in association with an open / close state of a circuit terminal of the control device. In claim 15,
One set of switch units is composed of one movable body and one base.
A plurality of sets of the switch units are arranged in a row and at the same height along a direction perpendicular to the straight line to constitute a cutoff switch group of the cutoff switch system,
The circuit terminal of the control device of each switch unit opens and closes between a control circuit and a relay circuit that controls the main circuit of each controlled device unique to the switch system,
The movable body of each switch unit is in a first position when the circuit terminal of the corresponding control device is closed with respect to the base, and is in a second position state when the circuit terminal of the control device is open. An operation state detection device for a control device using an IC tag, characterized by being in the above.

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