JPWO2016084203A1 - Elevator position detection device - Google Patents

Abstract

In the elevator position detection device, an excitation coil (281) and a detection coil (291) are arranged with a detection region (15) in between. As viewed from the detection region (15), the first test coil (311) is disposed on the excitation coil (281) side, and the second test coil (312) is disposed on the detection coil (291) side. In the second stuck-at fault diagnosis mode, a closed circuit including the first and second test coils (311 and 312) is configured, and induction occurs in the first test coil (311) due to the alternating magnetic field of the excitation coil (281). The electric power generates a magnetic field in the second test coil (312) that generates an induced electromotive force in the detection coil (291). In the first stuck-at fault diagnosis mode, a closed circuit including the first test coil (311) is configured, and the induction magnetic field is applied in the direction to cancel the AC magnetic field of the excitation coil (281) by the AC magnetic field of the excitation coil (281). 1 occurs in one test coil (311).

Description

  The present invention relates to an elevator position detection device for detecting the position of a lifting body.

  Conventionally, a car is provided with multiple position detection sensors that output different output patterns corresponding to each floor, and it is determined that a failure occurs when the transition prediction data expected after the previous output pattern detection does not match the current output pattern An elevator position detection device has been proposed (see Patent Document 1).

Japanese Patent No. 5380407

  However, if the car does not move from one floor to the other, it is impossible to determine whether or not the position detection sensor has failed. Therefore, it takes time to determine the failure.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator position detection device that can easily determine whether or not there is a failure.

  An elevator position detection apparatus according to the present invention is provided in a detected body provided in a hoistway, a lifting body that moves in the vertical direction in the hoistway, provided with a detection region, and the detected object in the detection region. A sensor for detecting presence / absence, and a diagnostic circuit for diagnosing the presence / absence of a failure of the sensor by sending a test signal to the sensor and receiving the detection signal of the sensor, and the sensor has a sensor unit and a test unit, The unit has an excitation coil and a detection coil arranged across the detection region, and when an induced electromotive force is generated in the detection coil with an alternating magnetic field generated in the excitation coil, the first signal is output as a detection signal. When the induced electromotive force in the detection coil is suppressed in a state in which an alternating magnetic field is generated in the excitation coil, the second signal is output as a detection signal, and the test unit includes a normal mode during normal operation and a sensor unit. Between the first fixed failure diagnosis mode when diagnosing a failure in which the detection signal is fixed to the first signal and the second fixed failure diagnosis mode when diagnosing a failure in which the detection signal of the sensor unit is fixed to the second signal Thus, the mode can be switched based on whether or not a test signal is received, and the test unit is arranged on the detection coil side with respect to the first test coil arranged on the excitation coil side as viewed from the detection region and the detection region. A closed circuit including the arranged second test coil and the first and second test coils is configured in the second fixed failure diagnosis mode, and the first and second test coils are separated from each other in the first fixed failure diagnosis mode. A first switch and a second switch that forms a closed circuit including the first test coil in the first stuck-at fault diagnosis mode; Due to the induced electromotive force in the first test coil, a magnetic field that causes an induced electromotive force in the detection coil is generated in the second test coil. An induction magnetic field is generated in the first test coil in a direction to cancel the AC magnetic field.

  According to the elevator position detection apparatus of the present invention, it is possible to easily determine the presence or absence of a sensor failure while the elevator is stopped without moving.

It is a block diagram which shows the elevator by Embodiment 1 of this invention. It is a block diagram which shows the relationship between the identification board of FIG. 1, a sensor, and a control board. It is a block diagram which shows the sensor of FIG. It is a block diagram which shows a sensor when the identification board is in the detection area | region of FIG. It is a block diagram which shows a sensor when the mode of the test part of FIG. 4 is H fixation failure diagnostic mode. It is a block diagram which shows a sensor when the mode of the test part of FIG. 3 is L fixation failure diagnostic mode. It is a block diagram which shows the exciting coil and 1st test coil of the position detection apparatus of the elevator by Embodiment 2 of this invention. It is a block diagram which shows the sensor of the position detection apparatus of the elevator by this Embodiment 3. FIG. It is a block diagram which shows the sensor of the position detection apparatus of the elevator by Embodiment 4 of this invention. It is a block diagram which shows the sensor of the position detection apparatus of the elevator by Embodiment 5 of this invention. It is a block diagram which shows the position detection apparatus of the elevator by Embodiment 6 of this invention. It is a block diagram which shows the position detection apparatus of the elevator by Embodiment 7 of this invention.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided in the upper part of the hoistway 1. In the machine room 2, a hoisting machine 3 that is a driving device, a sled wheel 4 that is arranged away from the sheave of the hoisting machine 3, and a control panel 5 that controls the operation of the elevator are installed. . A plurality of cords 6 are wound around the sheave and the deflector 4 of the hoist 3. As the cord-like body 6, for example, a rope or a belt is used. A car 7 and a counterweight 8 provided as elevating bodies in the hoistway 1 are suspended by a cord-like body 6. The car 7 and the counterweight 8 are moved up and down in the hoistway 1 by the driving force of the hoisting machine 3 while being individually guided by a plurality of rails (not shown) installed in the hoistway 1. The

  The car 7 is provided with a car door (not shown) that opens and closes the car doorway. A landing door 10 that opens and closes a landing doorway is provided at the landing 9 on each floor. When the car 7 is stopped on any floor, the car doorway and the landing doorway are opened and closed by moving in a horizontal direction while the car door is engaged with the landing door 10.

  In the hoistway 1, a plurality of metal identification plates 11, which are detected bodies for landing positions, are provided at intervals with respect to the moving direction of the car 7. Each identification plate 11 is arranged at a position corresponding to each floor in the hoistway 1. Each identification board 11 is arrange | positioned in the position of fixed height from the floor of the landing 9 of a corresponding floor.

  Further, in the hoistway 1, a metal identification plate 12 that is a detection object for the terminal portion is provided corresponding to each position of the upper terminal floor and the lower terminal floor. The length of each identification plate 12 in the moving direction of the car 7 is longer than the length of each identification plate 11. Moreover, each identification board 12 is arrange | positioned in the position away from the identification board 11 about the horizontal direction.

  The car 7 is provided with an eddy current sensor 13 that is a proximity sensor for detecting the identification plate 11 and an eddy current sensor 14 that is a proximity sensor for detecting the identification plate 12. In this example, the sensors 13 and 14 are provided on the upper portion of the car 7.

  FIG. 2 is a configuration diagram showing the relationship between the identification plate 11, the sensor 13, and the control panel 5 of FIG. The sensor 13 is provided with a detection region 15 that is a space. The sensor 13 detects the presence or absence of the identification plate 11 in the detection area 15. When the car 7 stops on any floor, the identification board 11 enters the detection area 15, and when the car 7 moves up and down from each floor, the identification board 11 comes off the detection area 15. In this example, the shape of the sensor 13 when viewed from above is a U shape surrounding the detection region 15.

  The sensor 13 outputs different detection signals according to the presence or absence of the identification plate 11 in the detection area 15. Specifically, when the sensor 13 detects that the identification plate 11 is not present in the detection region 15, the first signal is output from the sensor 13 as a detection signal, and when the sensor 13 detects that the identification plate 11 is present in the detection region 15. A second signal different from the first signal is output from the sensor 13 as a detection signal. In this example, the first signal is an L signal, that is, a Low signal, and the second signal is an H signal, that is, a high signal.

  The control panel 5 is provided with a diagnostic circuit 16 for diagnosing whether or not the sensor 13 has failed. The diagnostic circuit 16 diagnoses whether or not the sensor 13 has failed by sending a test signal to the sensor 13 and receiving a detection signal from the sensor 13. That is, the diagnostic circuit 16 diagnoses the presence or absence of a failure of the sensor 13 based on the test signal output to the sensor 13 and the detection signal received from the sensor 13. The control panel 5 controls the operation of the elevator based on the diagnosis result by the diagnosis circuit 16.

  FIG. 3 is a block diagram showing the sensor 13 of FIG. The sensor 13 includes a housing 21, and a sensor unit 22 and a test unit 23 disposed in the housing 21.

  The housing 21 includes a housing main body 24 and a pair of housing facing portions 25 provided in the housing main body 24 and disposed at a position sandwiching the detection region 15. The shape of the housing 21 when viewed along the moving direction of the car 7 is U-shaped by the housing body 24 and the pair of housing facing portions 25.

  The sensor unit 22 includes a sensor circuit 26 and an output circuit 27.

  The sensor circuit 26 includes an excitation side resonance circuit 28 that electrically connects the excitation coil 281 and the capacitor 282 to form a closed circuit, and a detection side that electrically connects the detection coil 291 and the capacitor 292 to form a closed circuit. A resonance circuit 29 and a switching element 30 that controls a signal to the output circuit 27 in accordance with a signal from the detection-side resonance circuit 29 are provided.

  The excitation coil 281 is provided in one casing facing portion 25, and the detection coil 291 is provided in the other casing facing portion 25. Thus, the excitation coil 281 and the detection coil 291 are arranged with the detection region 15 interposed therebetween. The excitation coil 281 generates an AC magnetic field F1 when an excitation current from an AC power source flows through the excitation-side resonance circuit 28. In the detection-side resonance circuit 29, when the detection coil 291 receives an alternating magnetic field and an induced electromotive force is generated in the detection coil 291, a resonance current flows at a specific resonance frequency.

  The switching element 30 outputs an alternating current from the sensor circuit 26 to the output circuit 27 when an induced electromotive force is generated in the detection coil 291 and current resonance occurs in the detection-side resonance circuit 29. Further, when the induced electromotive force in the detection coil 291 is suppressed and the resonance of the current in the detection-side resonance circuit 29 is stopped, the switching element 30 stops the output of the alternating current from the sensor circuit 26 to the output circuit 27.

  The output circuit 27 includes a rectification / comparator circuit 271 that rectifies the output of the alternating current from the sensor circuit 26. Further, when a current is output from the sensor circuit 26 to the rectifier / comparator circuit 271, the output circuit 27 outputs an H signal, which is a DC signal, to the diagnostic circuit 16 as a detection signal of the sensor unit 22 and rectifies from the sensor circuit 26. When the current output to the comparator circuit 271 stops, the L signal, which is a DC signal different from the H signal, is output to the diagnostic circuit 16 as a detection signal of the sensor unit 22.

  In the sensor unit 22, when the identification plate 11 is removed from the detection region 15, the alternating magnetic field F <b> 1 from the excitation coil 281 reaches the detection coil 291 through the detection region 15. When the detection coil 291 receives the AC magnetic field F <b> 1 from the excitation coil 281, an induced electromotive force is generated in the detection coil 291, and current resonance occurs at a resonance frequency corresponding to the detection-side resonance circuit 29. In a state where no failure has occurred in the sensor unit 22, when current resonance occurs in the detection-side resonance circuit 29, the L signal is output from the output circuit 27 to the diagnosis circuit 16 as a detection signal.

  FIG. 4 is a configuration diagram showing the sensor 13 when the identification plate 11 is in the detection region 15 of FIG. When the identification plate 11 enters the detection region 15, an eddy current is generated in the identification plate 11 by the AC magnetic field F 1 from the excitation coil 281, and the eddy current magnetic field F 2 is moved in a direction to cancel the AC magnetic field F 1 of the excitation coil 281. Arising from. Thereby, the induced electromotive force in the detection coil 291 is suppressed, and the resonance of the current in the detection-side resonance circuit 29 is stopped. In the state where no failure has occurred in the sensor unit 22, when the resonance of the current in the detection-side resonance circuit 29 stops, the H signal is output from the output circuit 27 to the diagnosis circuit 16 as a detection signal.

  Here, the sensor unit 22 has an L fixing failure (that is, the first fixing) in which the detection signal of the sensor unit 22 is fixed to the L signal that is the first signal regardless of the presence or absence of the identification plate 11 in the detection region 15. Failure) and an H fixing failure (that is, a second fixing failure) in which the detection signal of the sensor unit 22 is fixed to the H signal that is the second signal regardless of the presence or absence of the identification plate 11 in the detection region 15. There is a fear. Based on whether or not a test signal is received from the diagnostic circuit 16, the test unit 23 performs a normal mode during normal operation and an L-fixation failure diagnosis mode (ie, an L-fixation failure diagnosis mode when diagnosing an L-fixation failure that is the first fixation failure). , The first fixing failure diagnosis mode) and the H fixing failure diagnosis mode (ie, the second fixing failure diagnosis mode) when diagnosing the H fixing failure which is the second fixing failure can be switched. It has become. When the mode of the test unit 23 is switched to the L-fixed fault diagnostic mode or the H-fixed fault diagnostic mode, the diagnosis circuit 16 can perform diagnosis of each of the L-fixed fault and the H-fixed fault.

  The test unit 23 includes a test circuit 31 and a reception unit 32.

  The test circuit 31 includes a first test coil 311, a second test coil 312, two first switches 313, a second switch 314, and a third switch 315.

  The first test coil 311 is arranged on the exciting coil 281 side when viewed from the detection region 15. Further, the first test coil 311 is disposed at a position farther from the detection region 15 than the excitation coil 281.

  The second test coil 312 is disposed on the detection coil 291 side when viewed from the detection region 15. Further, the second test coil 312 is disposed at a position farther from the detection region 15 than the detection coil 291.

  Each first switch 313 individually opens and closes an electrical connection between one end portions and the other end portions of the first and second test coils 311 and 312. Each first switch 313 is open when the test unit 23 is in the L-fixed fault diagnostic mode, and is closed when the test unit 23 is in the H-fixed fault diagnostic mode. When each first switch 313 is opened, the first and second test coils 311 and 312 are disconnected from each other. When each first switch 313 is closed, the first and second test coils 311 and 312 are electrically connected to each other, and a closed circuit including the first and second test coils 311 and 312 is formed. Composed.

  The second switch 314 opens and closes an electrical connection between one end and the other end of the first test coil 311. The second switch 314 is closed when the test unit 23 is in the L-fixation failure diagnosis mode and is open when the test unit 23 is in the H-fixation failure diagnosis mode. When the second switch 314 is in a closed state, one end and the other end of the first test coil 311 are short-circuited, and a closed circuit including the first test coil 311 is configured. When the second switch 314 is opened, the short circuit between one end and the other end of the first test coil 311 is released.

  The third switch 315 opens and closes an electrical connection between one end and the other end of the second test coil 312. The third switch 315 is in a closed state when the test unit 23 is in the L-fixation failure diagnosis mode, and is in an open state when the test unit 23 is in the H-fixation failure diagnosis mode. When the third switch 315 is closed, one end and the other end of the second test coil 312 are short-circuited to form a closed circuit including the second test coil 312. When the third switch 315 is opened, the short circuit between one end and the other end of the second test coil 312 is released.

  The diagnostic circuit 16 sends one diagnostic signal selected from the different L fixation diagnostic signal and H fixation diagnostic signal (that is, the first fixation diagnostic signal and the second fixation diagnosis signal) to the test unit 23 as a test signal. There is only one system for sending a test signal from the diagnostic circuit 16 to the test unit 23. A test signal from the diagnostic circuit 16 is received by the receiving unit 32 of the test unit 23.

  In the state where reception of the test signal by the receiving unit 32 is stopped, the mode of the test unit 23 is the normal mode. When the test unit 23 is in the normal mode, all of the first to third switches 313 to 315 are in an open state, and the failure diagnosis of the sensor unit 22 is not performed.

  When receiving the test signal from the diagnostic circuit 16, the receiving unit 32 determines whether the test signal is an L fixing diagnostic signal or an H fixing diagnostic signal. In this example, the receiving unit 32 includes a band-pass filter 321 that is a second diagnostic signal operation unit that operates only on the H fixation diagnostic signal among the L fixation diagnosis signal and the H fixation diagnosis signal, and the L fixation diagnosis signal and A low-pass filter 322 that is a first diagnostic signal operation unit that operates only on the L fixation diagnostic signal among the H fixation diagnosis signals. When the H sticking diagnosis signal is received by the receiving unit 32, the band-pass filter 321 is operated, the two first switches 313 are closed, and the mode of the test unit 23 is set to the H sticking fault diagnostic mode. When the L sticking diagnosis signal is received by the receiving unit 32, the low-pass filter 322 is operated, the second switch 314 and the third switch 315 are closed, and the mode of the test unit 23 is set to the L sticking fault diagnosis mode. become.

  When the mode of the test unit 23 is the normal mode, the control panel 5 specifies the position of the car 7 when the identification plate 11 enters the detection area 15 based on the detection signal from the sensor unit 22 and specifies The operation of the elevator is controlled based on the position of the basket 7.

  The configuration of the sensor 14 is the same as the configuration of the sensor 13. In the same way as the sensor 13, the failure of the sensor 14 is diagnosed by sending a test signal from the diagnostic circuit 16 and receiving a detection signal from the sensor 14 by the diagnostic circuit 16. The elevator position detection apparatus includes identification plates 11 and 12, sensors 13 and 14, and a diagnostic circuit 16.

  Next, the operation will be described. When the car 7 stops at any of the floors under the control of the control panel 5, the identification plate 11 corresponding to the stop floor of the car 7 enters the detection area 15 of the sensor 13. When the identification plate 11 enters the detection region 15, the alternating magnetic field F <b> 1 from the exciting coil 281 reaches the identification plate 11, and an eddy current magnetic field F <b> 2 is generated from the identification plate 11. On the other hand, when the car 7 moves up and down from any one of the floors, the identification plate 11 is removed from the detection region 15 and the eddy current magnetic field F2 is not generated from the identification plate 11.

  When the output of the test signal from the diagnostic circuit 16 to the test unit 23 is stopped, the mode of the test unit 23 is the normal mode. The service operation of the elevator is performed in a state where the mode of the test unit 23 is set to the normal mode.

  When the mode of the test unit 23 is the normal mode, each of the first to third switches 313 to 315 is opened. Thereby, even if the alternating magnetic field F1 is generated from the exciting coil 281, no magnetic field is generated from the first and second test coils 311, 312.

  When the identification plate 11 enters the detection region 15 in the normal mode, the eddy current magnetic field F2 in the direction to cancel the AC magnetic field F1 of the excitation coil 281 is caused by the AC magnetic field F1 of the excitation coil 281 as shown in FIG. Arising from. Thereby, the induced electromotive force in the detection coil 291 is suppressed, and the resonance of the current in the detection-side resonance circuit 29 is stopped. When resonance in the detection-side resonance circuit 29 stops, the H signal is output from the output circuit 27 to the diagnosis circuit 16 as a detection signal.

  On the other hand, when the identification plate 11 is removed from the detection region 15 in the normal mode, the alternating magnetic field F1 of the excitation coil 281 reaches the detection coil 291 as shown in FIG. As a result, an induced electromotive force is generated in the detection coil 291, and current resonance occurs in the detection-side resonance circuit 29. When current resonance occurs in the detection-side resonance circuit 29, the L signal is output from the output circuit 27 to the diagnosis circuit 16 as a detection signal.

  In the control panel 5, it is determined whether or not the car 7 is on the floor based on the detection signal (that is, L signal or H signal) sent from the sensor unit 22 to the diagnostic circuit 16. The operation of the elevator is controlled by the control panel 5 based on the determination result of whether or not the car 7 is on the floor.

  When diagnosing the second fixing failure, the H fixing diagnosis signal is output from the diagnostic circuit 16 to the test unit 23 as a test signal. In this example, the H fixation diagnosis signal is a rectangular wave signal. In the test unit 23, when the reception unit 32 receives the H fixation diagnostic signal, the bandpass filter 321 is operated, and the mode of the test unit 23 is switched from the normal mode to the H fixation failure diagnosis mode.

  FIG. 5 is a configuration diagram showing the sensor 13 when the mode of the test unit 23 in FIG. 4 is the H-fixation failure diagnosis mode. In the H sticking failure diagnosis mode, the second and third switches 314 and 315 are opened, and the first switches 313 are closed. As a result, the test circuit 31 includes a closed circuit including the first and second test coils 311 and 312.

  In the H-fixation failure diagnosis mode, a closed circuit including the first and second test coils 311 and 312 is configured, so that an induced electromotive force is generated in the first test coil 311 by the AC magnetic field F1 of the excitation coil 281. The magnetic field F3 is generated in the second test coil 312 by the induced electromotive force in the first test coil 311. Thereby, an induced electromotive force is generated in the detection coil 291, and current resonance occurs in the detection-side resonance circuit 29. That is, in the H fixing failure diagnostic mode, the magnetic field F3 that causes the induced electromotive force in the detection coil 291 is generated in the second test coil 312 regardless of the presence or absence of the identification plate 11 in the detection region 15, thereby Is forcibly reproduced from the detection area 15.

  After the diagnosis signal 16 is output from the diagnostic circuit 16 to the test unit 23 as a test signal, the diagnostic circuit 16 receives the detection signal from the sensor unit 22. Is coincident with the signal corresponding to the H fixation diagnosis signal, that is, the L signal. As a result, if the detection signal from the sensor unit 22 matches the L signal, the diagnosis circuit 16 performs normality determination. On the other hand, when the detection signal from the sensor unit 22 is an H signal different from the L signal even though the test signal for forcing the sensor unit 22 to output the L signal is output to the test unit 23, the H fixation Failure diagnosis is performed by the diagnostic circuit 16. In this way, diagnosis of the H fixing failure of the sensor unit 22 is performed.

  When diagnosing an L-fixation failure, an L-fixation diagnosis signal is output from the diagnostic circuit 16 to the test unit 23 as a test signal. In this example, the L fixation diagnosis signal is a high DC signal. In the test unit 23, when the reception unit 32 receives the L fixation diagnosis signal, the low pass filter 322 is operated, and the mode of the test unit 23 is switched from the normal mode to the L fixation failure diagnosis mode.

  FIG. 6 is a configuration diagram showing the sensor 13 when the mode of the test unit 23 in FIG. 3 is the L-fixation failure diagnosis mode. In the L fixation failure diagnosis mode, the second and third switches 314 and 315 are closed, and each first switch 313 is opened. As a result, the test circuit 31 includes a closed circuit including the first test coil 311 and a closed circuit including the second test coil 312 which are separated from each other and configured independently.

  Since the closed circuit including the first test coil 311 is configured in the L fixing failure diagnosis mode, an induced electromotive force is generated in the first test coil 311 by the AC magnetic field F1 of the excitation coil 281, and the excitation coil 281. The first test coil 311 generates an induction magnetic field F4 in a direction to cancel the AC magnetic field F1. Even if the AC magnetic field F1 of the excitation coil 281 reaches the detection coil 291, an induced electromotive force is generated in the second test coil 311 by the AC magnetic field F1 of the excitation coil 281 and the AC magnetic field F1 of the excitation coil 281 is generated. The second test coil 312 generates a magnetic field F3 in a direction that cancels. Thereby, regardless of the presence or absence of the identification plate 11 in the detection region 15, the AC magnetic field F1 of the excitation coil 281 is suppressed, and the induced electromotive force in the detection coil 291 is suppressed. Thereby, regardless of the presence or absence of the identification plate 11 in the detection region 15, the resonance of the current in the detection-side resonance circuit 29 is stopped, and the state where the identification plate 11 is in the detection region 15 is forcibly reproduced. .

  After the L fixation diagnostic signal is output from the diagnostic circuit 16 to the test unit 23 as a test signal, when the detection signal from the sensor unit 22 is received by the diagnostic circuit 16, the diagnostic circuit 16 detects the detection signal from the sensor unit 22. Is coincident with the signal corresponding to the L fixation diagnosis signal, that is, the H signal. As a result, if the detection signal from the sensor unit 22 matches the H signal, the diagnosis circuit 16 makes a normal determination. On the other hand, when the detection signal from the sensor unit 22 is an L signal different from the H signal even though the test signal for forcibly outputting the H signal to the sensor unit 22 is output to the test unit 23, the L fixation Failure diagnosis is performed by the diagnostic circuit 16. In this way, diagnosis of the L fixing failure of the sensor unit 22 is performed.

  For the sensor 14 that detects the identification plate 12 when the car 7 stops on the upper terminal floor and the lower terminal floor, the diagnosis of the H fixing failure and the diagnosis of the L fixing failure are performed in the same manner as the sensor 13.

  In such an elevator position detection apparatus, the test unit 23 can switch between the L-fixation failure diagnosis mode and the H-fixation failure diagnosis mode. Due to the induced electromotive force in the first test coil 311 due to the magnetic field F1, a magnetic field F3 that causes an induced electromotive force in the detection coil 291 is generated in the second test coil 312. Since the induction magnetic field F4 is generated in the first test coil 311 in the direction to cancel the AC magnetic field F1 of the excitation coil 281 by the magnetic field F1, the first to third switches 313 to 313 are stopped without moving the car 7. It is possible to determine the presence or absence of an L-fixation failure and the presence or absence of an H-fixation failure of the sensor unit 22 simply by opening and closing each of the 315. . Thereby, determination of the presence or absence of failure of the sensors 13 and 14 can be facilitated.

  Further, the diagnostic circuit 16 sends the L fixation diagnostic signal as a test signal to the test unit 23 to set the mode of the test unit 23 to the L fixation failure diagnosis mode, and tests the H fixation diagnosis signal different from the L fixation diagnosis signal as a test signal. Since the mode of the test unit 23 is set to the H fixing failure diagnosis mode by sending to the unit 23, the mode of the test unit 23 can be easily switched, and each of the L fixing failure and the H fixing failure of the sensor unit 22 can be performed. Diagnosis can be made easily.

  In addition, since the test unit 23 includes the receiving unit 32 that determines whether the test signal from the diagnostic circuit 16 is an L-fixed diagnostic signal or an H-fixed diagnostic signal, the diagnostic circuit 16 transfers the test signal to the test unit 23. Only one system can be used to send the test signal, and the cost of the elevator position detection device can be reduced.

Embodiment 2. FIG.
FIG. 7 is a block diagram showing an excitation coil 281 and a first test coil 311 of the elevator position detection apparatus according to Embodiment 2 of the present invention. The conducting wires of the exciting coil 281 and the first test coil 311 are wound on each other. In this example, the conducting wire of the exciting coil 281 and the conducting wire of the first test coil 311 are wound in a spiral shape with the axis as the center in a state of overlapping each other.

  The conducting wires of the detection coil 291 and the second test coil 312 are also wound on each other. In this example, although not shown in the drawing, the conducting wire of the detection coil 291 and the conducting wire of the second test coil 312 are wound in a spiral shape centering on the axis while being overlapped with each other. Other configurations are the same as those in the first embodiment.

  In such an elevator position detection apparatus, the respective conductive wires of the exciting coil 281 and the first test coil 311 are wound on each other, and the respective conductive wires of the detection coil 291 and the second test coil 312 are wound on each other. Therefore, the space for arranging the excitation coil 281, the detection coil 291, the first test coil 311, and the second test coil 312 can be reduced as a whole, and the sensor 13 can be downsized. In addition, the excitation coil 281 and the first test coil 311 can be handled as one component, and the detection coil 291 and the second test coil 312 can be handled as one component, thereby reducing the number of components. it can.

  In the above example, the conducting wires of the excitation coil 281 and the first test coil 311 are wound on each other, and the conducting wires of the detection coil 291 and the second test coil 312 are wound on each other. However, only the conductive wires of the exciting coil 281 and the first test coil 311 may be wound on each other, or only the conductive wires of the detection coil 291 and the second test coil 312 may be stacked on each other. You may make it wind.

Embodiment 3 FIG.
FIG. 8 is a block diagram showing the sensor 13 of the elevator position detection apparatus according to the third embodiment. In the present embodiment, the third switch 315 is removed from the configuration included in the test circuit 31 of the test unit 23 in the first embodiment, as shown by the dashed line A in FIG. As a result, both ends of the second test coil 312 are not electrically short-circuited. The configurations of the first test coil 311, the second test coil 312, the first switches 313 and the second switches 314 of the test circuit 31 are the same as those in the first embodiment. Other configurations are the same as those in the first embodiment.

  The operation in the H fixing failure diagnosis mode is the same as that in the first embodiment. Further, in the L fixing failure diagnosis mode, each first switch 313 is opened, and the second switch 314 is closed. As a result, in the L fixation failure diagnosis mode, a closed circuit including the second test coil 312 is not formed while a short circuit between both ends of the second test coil 312 is avoided, and both ends of the first test coil 311 are not formed. The parts are short-circuited to form a closed circuit including the first test coil 311.

  In the L-fixation failure diagnosis mode, an induction magnetic field is generated in the first test coil 311 in a direction to cancel the AC magnetic field of the excitation coil 281 by the AC magnetic field of the excitation coil 281. As a result, regardless of the presence or absence of the identification plate 11 in the detection region 15, the generation of the induced electromotive force in the detection coil 291 is suppressed and the resonance of the current in the detection-side resonance circuit 29 is stopped, and the identification plate 11 detects The state in the area 15 is forcibly reproduced. Other operations are the same as those in the first embodiment.

  In this way, even if the third switch 315 that opens and closes the electrical connection between both ends of the second test coil 312 is eliminated, the closed circuit including the second test coil 312 is not configured. It is possible to easily diagnose each of the L fixation failure and the H fixation failure while the car 7 is stopped. In addition, since the third switch 315 is eliminated, the number of parts can be reduced.

Embodiment 4 FIG.
FIG. 9 is a block diagram showing a sensor 13 of an elevator position detection apparatus according to Embodiment 4 of the present invention. In the present embodiment, the L fixation diagnosis signal and the H fixation diagnosis signal from the diagnosis circuit 16 are individually sent as test signals to the reception unit 32 of the test unit 23 through two different systems. The receiving unit 32 includes an L diagnostic signal receiving unit 323 that receives an L fixing diagnostic signal and an H diagnostic signal receiving unit 324 that receives an H fixing diagnostic signal. The mode of the test unit 23 is set to the L-fixation failure diagnostic mode when the L diagnostic signal passing through one system from the diagnostic circuit 16 is received by the L diagnostic signal receiving unit 323, and passes through the other system from the diagnostic circuit 16. When the H diagnosis signal is received by the H diagnosis signal receiving unit 324, the H fixing failure diagnosis mode is set. Other configurations are the same as those in the first embodiment.

  As described above, even when the L fixation diagnosis signal and the H fixation diagnosis signal from the diagnosis circuit 16 are individually sent to the test unit 23 through two different systems, the mode of the test unit 23 can be easily switched. Can do. In addition, since it is not necessary to provide the receiving unit 32 with a configuration for determining which of the L fixing diagnostic signal and the H fixing diagnostic signal, the configuration of the receiving unit 32 of the test unit 23 can be simplified, and the cost can be reduced. Reduction can be achieved.

Embodiment 5. FIG.
10 is a block diagram showing a sensor 13 of an elevator position detection apparatus according to Embodiment 5 of the present invention. Only one system sends a test signal from the diagnostic circuit 16 to the test unit 23. That is, the diagnostic circuit 16 sends an L sticking diagnosis signal to the test unit 23 as a test signal or sends an H sticking diagnosis signal to the test unit 23 as a test signal through only one system. The voltage values of the L fixation diagnosis signal and the H fixation diagnosis signal are different from each other. That is, the voltage values of the test signal are different from each other in accordance with the L fixing diagnosis signal and the H fixing diagnosis signal.

  The receiving unit 32 of the test unit 23 is a comparator that determines whether the test signal is an L fixing diagnostic signal or an H fixing diagnostic signal depending on the voltage value of the test signal. The mode of the test unit 23 becomes the normal mode when reception of the test signal is stopped, and when the test signal is received by the reception unit 32, the reception unit of the L fixation failure diagnosis mode and the H fixation failure diagnosis mode. The mode corresponds to either the L sticking diagnosis signal or the H sticking diagnosis signal determined in 32. In this example, when the voltage value of the test signal is 0 [V], that is, when the test signal is not received by the receiving unit 32, the mode of the test unit 23 becomes the normal mode, and the voltage value of the test signal is determined in advance. The mode of the test unit 23 is in the H fixing failure diagnosis mode when the H value is set, and the mode of the test unit 23 is when the voltage value of the test signal is an intermediate value between 0 [V] and the H value. The L fixing failure diagnosis mode is set. Other configurations are the same as those in the first embodiment.

  As described above, the voltage values of the test signals are different from each other in accordance with the L fixation diagnosis signal and the H fixation diagnosis signal. Depending on the voltage value of the test signal, the test signal is either the L fixation diagnosis signal or the H fixation diagnosis signal. Even if the receiving unit 32 determines whether or not the vehicle is stopped, the failure of the sensor 13 can be diagnosed while the car 7 is stopped, and the same effect as in the first embodiment can be obtained.

Embodiment 6 FIG.
FIG. 11 is a block diagram showing an elevator position detection apparatus according to Embodiment 6 of the present invention. In the present embodiment, the diagnostic circuit 16 is provided in the housing 21 of the sensor 13. Thereby, the diagnostic circuit 16 is mounted on the sensor 13. A detection signal (that is, an L signal or an H signal) from the sensor unit 22 that detects the presence or absence of the identification plate 11 in the detection region 15 is sent to each of the diagnostic circuit 16 and the control panel 5.

  The diagnostic circuit 16 sends the detection signal from the sensor unit 22 (that is, the L signal or the H signal) in each cycle by sending the L fixation diagnostic signal and the H fixation diagnostic signal as test signals to the test unit 23 at regular intervals. Thus, each of the L fixing failure and the H fixing failure of the sensor unit 22 is diagnosed at a constant period. Further, the diagnostic circuit 16 outputs a failure determination signal to the control panel 5 when the diagnosis result is a determination of an L fixing failure or an H fixing failure.

  The control panel 5 controls the operation of the elevator based on whether or not a failure determination signal is received from the diagnostic circuit 16 and the detection signal from the sensor unit 22. Other configurations are the same as those in the first embodiment.

  In such an elevator position detection apparatus, since the diagnostic circuit 16 is mounted on the sensor 13, the processing load in the control panel 5 can be reduced.

Embodiment 7 FIG.
FIG. 12 is a block diagram showing an elevator position detection apparatus according to Embodiment 7 of the present invention. In the present embodiment, the first test coil 311 is disposed closer to the detection region 15 than the excitation coil 281, and the second test coil 312 is disposed closer to the detection region 15 than the detection coil 291. Yes. Other configurations are the same as those of the sixth embodiment.

  Thus, the position of the first test coil 311 is closer to the detection area 15 than the position of the excitation coil 281, and the position of the second test coil 312 is closer to the detection area 15 than the position of the detection coil 291. However, it is possible to easily diagnose a failure of the sensor unit 22 while the car 7 is stopped.

  In the above example, the first test coil 311 is disposed closer to the detection region 15 than the excitation coil 281, and the second test coil 312 is closer to the detection region 15 than the detection coil 291. However, the first test coil 311 is arranged at a position farther from the detection area 15 than the excitation coil 281, and the second test coil 312 is arranged at a position closer to the detection area 15 than the detection coil 291. May be. Alternatively, the first test coil 311 may be disposed at a position closer to the detection region 15 than the excitation coil 281, and the second test coil 312 may be disposed at a position farther from the detection region 15 than the detection coil 291.

  In the above example, the configuration in which the first test coil 311 is disposed closer to the detection region 15 than the excitation coil 281 is applied to the sensor 13 of the sixth embodiment, but the first test coil 311 May be applied to the sensor 13 of the first and third to fifth embodiments.

  In the above example, the configuration in which the second test coil 312 is arranged closer to the detection region 15 than the detection coil 291 is applied to the sensor 13 of the sixth embodiment. May be applied to the sensors 13 of the first and third to fifth embodiments.

  In the second embodiment, the configuration in which the conducting wires of the exciting coil 281 and the first test coil 311 are wound on each other is applied to the sensor 13 of the first embodiment. A configuration in which the respective conducting wires of one test coil 311 are overlapped and wound may be applied to the sensor 13 of the third to sixth embodiments.

  In the second embodiment, the configuration in which the conductors of the detection coil 291 and the second test coil 312 are overlapped and wound is applied to the sensor 13 of the first embodiment. A configuration in which the respective conductors of the two test coils 312 are overlapped and wound may be applied to the sensor 13 of the third to sixth embodiments.

  In the third embodiment, the configuration without the third switch 315 is applied to the sensor 13 of the first embodiment. However, the configuration without the third switch 315 is the same as that of the fourth to seventh embodiments. You may apply to the sensor 13. FIG.

  In the sixth embodiment, the configuration in which the diagnostic circuit 16 is mounted on the sensor 13 is applied to the sensor 13 in the first embodiment. However, the configuration in which the diagnostic circuit 16 is mounted on the sensor 13 is the same as that in the fourth and fourth embodiments. 5 may be applied to the sensor 13.

  In each of the above embodiments, the test circuit 31 includes two first switches 313 that open and close the electrical connection between the first and second test coils 311 and 312. The switch 313 may not be provided. Even in this way, it is possible to diagnose the L fixing failure of the test unit 22, that is, the first fixing failure. In addition, if this is done, the configuration of the test circuit 31 can be simplified.

  When each first switch 313 is eliminated, the first and second test coils 311 and 312 are electrically separated from each other and remain independent. As a result, when the second switch 314 is closed during the L-fixation failure diagnosis mode of the test unit 23, the closed state including the first test coil 311 is maintained while the first and second test coils 311 and 312 are disconnected from each other. A circuit is constructed. In this case, only one type of test signal from the diagnostic circuit 16 is provided, and the configuration of the receiving unit 32 is simplified. Further, in this case, the mode of the test unit 23 is switched between the normal mode and the L-fixation failure diagnosis mode based on whether or not the test signal is received by the test unit 23. That is, the mode of the test unit 23 is the L-fixation failure diagnosis mode when a test signal is received, and the normal mode when reception of the test signal is stopped.

  In each of the above embodiments, the second switch 314 that opens and closes the electrical connection between both ends of the first test coil 311 and the electrical connection between both ends of the second test coil 312 are opened and closed. Although the test circuit 31 includes the third switch 315, the second switch 314 and the third switch 315 may be omitted. Even in this way, the diagnosis of the H fixing failure of the test unit 22, that is, the diagnosis of the second fixing failure can be performed. In addition, if this is done, the configuration of the test circuit 31 can be simplified.

  When the second and third switches 314, 315 are eliminated, both ends of the first test coil 311 are not electrically short-circuited, and both ends of the second test coil 312 are not electrically short-circuited. To be. Thereby, when each 1st switch 314 will be in a closed state at the time of the H fixation failure diagnostic mode of the test part 23, the closed circuit containing the 1st and 2nd test coils 311 and 312 will be comprised. In this case, only one type of test signal from the diagnostic circuit 16 is provided, and the configuration of the receiving unit 32 is simplified. Furthermore, in this case, the mode of the test unit 23 is switched between the normal mode and the H fixing failure diagnosis mode based on whether or not the test signal is received by the test unit 23. That is, the mode of the test unit 23 is the H fixing failure diagnosis mode when the test signal is received, and the normal mode when the reception of the test signal is stopped.

  Moreover, in each said embodiment, although the sensors 13 and 14 are provided in the cage | basket | car 7, you may provide the sensors 13 and 14 in the counterweight as a raising / lowering body.

  In each of the above embodiments, the first signal output from the sensor 13 when there is no identification plate 11 in the detection region 15 is an L signal, that is, a Low signal, and when the identification plate 11 is in the detection region 15. The second signal output from the sensor 13 is an H signal, that is, a high signal. However, the present invention is not limited to this, and the first signal and the second signal may be different from each other. Therefore, the first signal may be an H signal, that is, a high signal, and the second signal may be an L signal, that is, a Low signal. In this case, the first fixing failure in which the detection signal of the sensor unit 22 is fixed to the first signal is H fixing failure, and the second fixing failure in which the detection signal of the sensor unit 22 is fixed to the second signal is L fixing. It becomes a failure. Further, in this case, the first fixed failure diagnostic mode when diagnosing the first fixed failure is the H fixed failure diagnostic mode, and the second fixed failure diagnostic mode when diagnosing the second fixed failure is the L fixed failure diagnostic mode. Become. Further, in this case, the first fixation diagnostic signal output from the diagnostic circuit 16 is an H fixation diagnostic signal, and the second fixation diagnostic signal output from the diagnostic circuit 16 is an L fixation diagnostic signal.

Claims (12)

A detected object provided in the hoistway,
Provided in a lifting body that moves up and down in the hoistway, provided with a detection region, a sensor that detects the presence or absence of the detected body in the detection region, and a test signal sent to the sensor to detect the sensor A diagnostic circuit for diagnosing the presence or absence of a failure of the sensor by receiving a signal;
The sensor has a sensor unit and a test unit,
The sensor unit includes an excitation coil and a detection coil arranged with the detection region interposed therebetween. When an induced electromotive force is generated in the detection coil in a state where an AC magnetic field is generated in the excitation coil, the first signal is output from the sensor unit. When the induced electromotive force in the detection coil is suppressed in a state where an AC magnetic field is generated in the excitation coil, a second signal different from the first signal is output as the detection signal.
The test unit includes a normal mode during normal operation, a first fixing failure diagnosis mode for diagnosing a failure in which a detection signal of the sensor unit is fixed to the first signal, and a detection signal of the sensor unit The mode can be switched based on whether or not the test signal is received between the second fixed failure diagnosis mode when diagnosing a failure fixed to two signals,
The test unit includes a first test coil disposed on the exciting coil side as viewed from the detection region, a second test coil disposed on the detection coil side as viewed from the detection region, and the second fixing failure. A first switch that constitutes a closed circuit including the first and second test coils in the diagnostic mode and disconnects the first and second test coils from each other in the first fixed fault diagnostic mode; and the first fixed fault A second switch constituting a closed circuit including the first test coil in the diagnostic mode,
In the second fixing failure diagnosis mode, a magnetic field that generates an induced electromotive force in the detection coil is generated in the second test coil by an induced electromotive force in the first test coil due to an alternating magnetic field of the excitation coil,
An elevator position detection device in which an induced magnetic field is generated in the first test coil in a direction in which the alternating magnetic field of the exciting coil is canceled by the alternating magnetic field of the exciting coil in the first fixing failure diagnosis mode.   The diagnostic circuit sends the first fixing diagnostic signal as the test signal to the test unit, thereby setting the mode of the test unit to the first fixing failure diagnostic mode, and a second fixing diagnostic signal different from the first fixing diagnostic signal. The elevator position detecting device according to claim 1, wherein the test unit is set to the second fixing failure diagnosis mode by sending the test signal to the test unit. The system that sends the test signal from the diagnostic circuit to the test unit is only one system,
The elevator position detection device according to claim 2, wherein the test unit further includes a reception unit that determines whether the test signal is the first fixation diagnosis signal or the second fixation diagnosis signal. The voltage values of the test signals are different from each other according to the first fixing diagnostic signal and the second fixing diagnostic signal,
The elevator position detection according to claim 3, wherein the receiving unit determines whether the test signal is the first fixing diagnosis signal or the second fixing diagnosis signal based on a difference in voltage value of the test signal. apparatus.   The elevator position detection apparatus according to claim 2, wherein the first fixation diagnosis signal and the second fixation diagnosis signal from the diagnosis circuit are individually sent to the test unit through two different systems. A detected object provided in the hoistway,
Provided in a lifting body that moves up and down in the hoistway, provided with a detection region, a sensor that detects the presence or absence of the detected body in the detection region, and a test signal sent to the sensor to detect the sensor A diagnostic circuit for diagnosing the presence or absence of a failure of the sensor by receiving a signal;
The sensor has a sensor unit and a test unit,
The sensor unit has an excitation coil and a detection coil arranged with the detection region interposed therebetween, and detects an first electromotive force when an induced electromotive force is generated in the detection coil with an AC magnetic field generated in the excitation coil. When the induced electromotive force in the detection coil is suppressed in a state where an alternating magnetic field is generated in the excitation coil, a second signal different from the first signal is output as a detection signal.
The test unit receives the test signal between a normal mode during normal operation and a first fixed failure diagnosis mode when diagnosing a failure in which the detection signal of the sensor unit is fixed to the first signal. The mode can be switched based on the presence or absence,
The test unit includes a first test coil disposed on the excitation coil side as viewed from the detection region, a second test coil disposed on the detection coil side as viewed from the detection region, and the first fixing failure. A second switch constituting a closed circuit including the first test coil while the first and second test coils are separated from each other in the diagnostic mode;
An elevator position detection device in which an induced magnetic field is generated in the first test coil in a direction in which the alternating magnetic field of the exciting coil is canceled by the alternating magnetic field of the exciting coil in the first fixing failure diagnosis mode. A detected object provided in the hoistway,
Provided in a lifting body that moves up and down in the hoistway, provided with a detection region, a sensor that detects the presence or absence of the detected body in the detection region, and a test signal sent to the sensor to detect the sensor A diagnostic circuit for diagnosing the presence or absence of a failure of the sensor by receiving a signal;
The sensor has a sensor unit and a test unit,
The sensor unit has an excitation coil and a detection coil arranged with the detection region interposed therebetween, and detects an first electromotive force when an induced electromotive force is generated in the detection coil with an AC magnetic field generated in the excitation coil. When the induced electromotive force in the detection coil is suppressed in a state where an alternating magnetic field is generated in the excitation coil, a second signal different from the first signal is output as a detection signal.
The test unit receives the test signal between a normal mode during normal operation and a second fixed failure diagnosis mode when diagnosing a failure in which the detection signal of the sensor unit is fixed to the second signal. The mode can be switched based on the presence or absence,
The test unit includes a first test coil disposed on the exciting coil side as viewed from the detection region, a second test coil disposed on the detection coil side as viewed from the detection region, and the second fixing failure. A first switch constituting a closed circuit including the first and second test coils in the diagnostic mode;
In the second fixing failure diagnosis mode, an elevator in which a magnetic field that generates an induced electromotive force in the detection coil is generated in the second test coil due to an induced electromotive force in the first test coil due to an alternating magnetic field of the excitation coil. Position detector.   The elevator position detection apparatus according to any one of claims 1 to 7, wherein the diagnostic circuit is mounted on the sensor.   The elevator position detection device according to any one of claims 1 to 8, wherein the conducting wires of the excitation coil and the first test coil are wound on top of each other.   The elevator position detection device according to any one of claims 1 to 9, wherein the conducting wires of the detection coil and the second test coil are wound on each other.   The elevator position detection device according to any one of claims 1 to 10, wherein the first test coil is disposed at a position closer to the detection region than the excitation coil.   The elevator position detection device according to any one of claims 1 to 11, wherein the second test coil is disposed closer to the detection region than the detection coil.

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