CN109153530B - Voice call registration device for elevator and self-diagnosis method for voice call registration function - Google Patents
Voice call registration device for elevator and self-diagnosis method for voice call registration function Download PDFInfo
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- CN109153530B CN109153530B CN201680086049.0A CN201680086049A CN109153530B CN 109153530 B CN109153530 B CN 109153530B CN 201680086049 A CN201680086049 A CN 201680086049A CN 109153530 B CN109153530 B CN 109153530B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
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Abstract
The voice call registration device for an elevator of the present invention comprises: a voice outputter which converts the 1 st floor information into the 1 st voice and outputs the 1 st voice when performing self-diagnosis of the voice call registration function; a voice inputter which converts the 1 st voice into 1 st voice data; a speech recognizer that executes speech recognition processing for the 1 st speech data and generates 2 nd floor information; and an abnormality determiner that calculates a degree of coincidence between the 1 st floor information and the 2 nd floor information, and determines that the result of the self-diagnosis is in an abnormal state when the degree of coincidence is lower than an allowable level.
Description
Technical Field
The present invention relates to an elevator voice call registration device and a self-diagnosis method of a voice call registration function, in which a user of an elevator can perform call registration by voice, and more particularly, to a device and a method of a self-diagnosis function having a voice recognition process.
Background
As a conventional technique using voice call registration, there is the following technique (for example, see patent documents 1 and 2). Patent document 1 includes an input means for remotely inputting an elevator operation command by voice, light wave, or the like, and a recognition means for discriminating whether or not an output signal sent from the input means matches a standard signal of a pre-registered elevator operation command.
Further, patent document 2 discloses a guide device such as a display for guiding a user to input a voice, and the user operates the guide device in accordance with the display. The speech recognition device of patent document 2 includes the following: the floor is identified according to the comparison result of the pre-registered standard voice data and the voice content and is output to the elevator control device.
Prior art documents
Patent document
Patent document 1: japanese laid-open patent publication No. 62-70184
Patent document 2: japanese Utility model No. 3006583 gazette
Disclosure of Invention
Problems to be solved by the invention
However, the following problems are present in the prior art.
When there is an abnormality in the voice recognition processing function, the voice call registration device cannot be used. However, when a user performs call registration by voice without knowing that the voice recognition processing function is abnormal, there is a problem that call registration cannot be performed as a result.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a voice call registration device and a self-diagnosis method of a voice call registration function that can prevent a user from getting caught in an elevator in the future when a call registration is performed by voice without knowing that a voice recognition processing function is abnormal.
Means for solving the problems
A voice call registration device for an elevator according to the present invention is a voice call registration device including: a voice input device for acquiring call registration information spoken by a user as voice data; and a voice recognizer that executes voice recognition processing for voice data to generate floor information corresponding to the voice data, and that performs call registration by transmitting the floor information to the elevator control device, wherein the voice call registration device for an elevator further includes: a voice outputter which converts the 1 st floor information into the 1 st voice and outputs the 1 st voice when performing self-diagnosis of the voice call registration function; and an abnormality determiner for diagnosing whether the voice input device and the voice recognizer function normally by using the 1 st voice, wherein the voice input device converts the 1 st voice output from the voice output device into the 1 st voice data when performing the self-diagnosis, the voice recognizer performs the voice recognition processing for the 1 st voice data to generate the 2 nd floor information corresponding to the 1 st voice data, the abnormality determiner calculates a matching degree between the 1 st floor information and the 2 nd floor information acquired from the voice recognizer, and determines that the 1 st floor information and the 2 nd floor information do not match when the calculated matching degree is lower than a preset allowable level, and determines that the self-diagnosis result is in an abnormal state.
A self-diagnosis method of a voice call registration function according to the present invention is a method executed by a voice call registration device that performs call registration by voice based on call registration information spoken by a user, the self-diagnosis method comprising: a 1 st step of converting the 1 st floor information into a 1 st voice and outputting the voice when performing self-diagnosis in the 1 st step; a 2 nd step of converting the 1 st voice output by the voice in the 1 st step into 1 st voice data; a 3 rd step of generating 2 nd floor information corresponding to the 1 st voice data by performing voice recognition processing for the 1 st voice data converted in the 2 nd step in the 3 rd step; a 4 th step of calculating a matching degree between the 1 st floor information and the 2 nd floor information generated in the 3 rd step in the 4 th step; and a 5 th step of determining that the 1 st floor information does not match the 2 nd floor information when the matching degree calculated in the 4 th step is lower than a preset allowable level, and determining that the self-diagnosis result is in an abnormal state in the 5 th step.
Effects of the invention
According to the present invention, there is provided a configuration capable of performing a self-diagnosis to check whether or not there is an abnormality in a device related to a voice recognition process without human intervention. As a result, it is possible to obtain a voice call registration device and a self-diagnosis method of a voice call registration function that can prevent a user from getting caught in an elevator in the future when the user performs call registration by voice without knowing that the voice recognition processing function is abnormal.
Drawings
Fig. 1 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 1 of the present invention.
Fig. 2 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device for an elevator according to embodiment 1 of the present invention.
Fig. 3 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 2 of the present invention.
Fig. 4 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device for an elevator according to embodiment 2 of the present invention.
Fig. 5 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 3 of the present invention.
Fig. 6 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device for an elevator according to embodiment 3 of the present invention.
Fig. 7 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 4 of the present invention.
Fig. 8 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device for an elevator according to embodiment 4 of the present invention.
Detailed Description
Hereinafter, preferred embodiments of a voice call registration device for an elevator and a self-diagnosis method of a voice call registration function according to the present invention will be described with reference to the drawings.
Embodiment 1.
Fig. 1 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 1 of the present invention. Fig. 1 shows a voice call registration device 20 and an elevator control device 10 that controls the operation of an elevator.
The voice call registration device 20 in embodiment 1 is configured to include a voice output device 21, a voice input device 22, a voice recognizer 23, and an abnormality determiner 24.
The elevator control device 10 outputs the floor 1 information to the voice call registration device 20 to self-diagnose the voice recognition processing function of the voice call registration device 20. As the 1 st floor information, information on a floor at which an elevator currently stops or information on a destination floor after arrival at the destination floor can be used.
The voice call registration device 20 may also generate the 1 st floor information as self-diagnosis information by receiving a command for executing self-diagnosis of the voice call registration function from the elevator control device 10. In the following description, a case where the voice call registration device 20 acquires the 1 st floor information from the elevator control device 10 will be described as an example.
In contrast, the voice output device 21 in the voice call registration device 20 outputs the 1 st floor information acquired from the elevator control device 10 as voice. Further, the voice input device 22 corresponding to a microphone takes in the voice output from the voice output device 21 as voice data, and transmits the voice data to the voice recognition device 23.
The speech recognizer 23 performs recognition processing of the speech data acquired via the speech input device 22, and generates the 2 nd floor information as a recognition result.
The abnormality determiner 24 compares the 2 nd floor information generated by the voice recognizer 23 with the 1 st floor information acquired from the elevator control device 10, and calculates the degree of coincidence between the two. Then, when the calculated degree of coincidence is lower than a preset allowable level, the abnormality determiner 24 determines that both pieces of information do not coincide and determines that it is an abnormality of the device associated with the voice recognition processing.
The voice call registration device for an elevator provided with the self-diagnosis function of the voice recognition processing described above can be used not only for a car but also for a hall.
Next, a series of operations of the self-diagnosis function of executing the voice recognition process of the voice call registration device for an elevator shown in fig. 1 will be described with reference to a flowchart. Fig. 2 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device 20 for an elevator according to embodiment 1 of the present invention.
In step S101, the voice output unit 21 outputs the self-diagnosis 1 st floor information acquired from the elevator control device 10 as a voice.
Next, in step S102, the voice recognizer 23 acquires the voice corresponding to the 1 st floor information transmitted from the voice output device 21 via the voice input device 22, and executes the recognition processing of the acquired voice to generate the 2 nd floor information.
Next, in step S103, the abnormality determiner 24 compares the 2 nd floor information generated by the voice recognizer 23 with the 1 st floor information acquired from the elevator control device 10, and calculates a matching degree. Further, the abnormality determiner 24 determines whether the 1 st floor information and the 2 nd floor information do not match by comparing the calculated matching degree with the tolerance level.
Then, when the calculated degree of coincidence is lower than the allowable level and it is determined that the 1 st floor information and the 2 nd floor information do not coincide with each other, the abnormality determiner 24 advances the process to step S104, determines that the device associated with the voice recognition process is in an abnormal state, and ends the series of processes.
On the other hand, when the abnormality determiner 24 determines that the apparatus associated with the voice recognition processing is not in a normal state, it returns to step S101 to perform the next self-diagnosis.
In addition, in a normal state, when a user performs a voice call registration, the voice of the user is acquired via the voice input device 22, and floor information obtained by performing voice recognition processing on the acquired voice by the voice recognizer 23 is transmitted to the elevator control device 10 as information of a call registration floor.
Therefore, the voice call registration device 20 having the configuration of fig. 1 can perform self-diagnosis as to whether or not it functions normally, using the voice input device 22 and the voice recognizer 23 used in the normal voice call registration processing as "devices related to the voice recognition processing".
As described above, according to embodiment 1, it is possible to self-diagnose, without human intervention, whether or not there is an abnormality in the device associated with the voice recognition processing. As a result, it is possible to prevent a situation in which the user performs call registration by voice without knowing that the voice recognition processing function is abnormal.
Embodiment 2.
In embodiment 1, a case where the abnormality determiner 24 determines that the device associated with the speech recognition processing is in an abnormal state when the degree of coincidence is equal to or less than the tolerance level has been described. In contrast, in embodiment 2, a configuration in which the following functions are further added will be described: when the coincidence degree is equal to or higher than the allowable level, the transition of the coincidence degree is monitored to detect a sign of abnormality.
Fig. 3 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 2 of the present invention. The voice call registration device 20 in embodiment 2 is configured to include a voice output device 21, a voice input device 22, a voice recognizer 23, an abnormality determiner 24, and a warning determiner 25.
The configuration of embodiment 2 shown in fig. 3 differs from the configuration of embodiment 1 shown in fig. 1 in that a warning indicator determiner 25 is further provided. Therefore, the following description focuses on this difference.
The sign determiner 25 receives the degree of coincidence calculated by the abnormality determiner 24. The predictive determiner 25 holds a history of the degree of coincidence a predetermined number of times, and determines a transition of the degree of coincidence from the held history data. Further, the sign determiner 25 can determine that there is a sign of the apparatus abnormality when the degree of coincidence of the history data is below a sign detection level set to a value higher than the permissible level.
Specifically, the predictive determiner 25 holds the consistency degree of the past 20 times as history data, for example, and monitors the transition of the consistency degree. When the predictive determiner 25 determines that the degree of coincidence included in the history data is greater than the allowable level but gradually decreases to become equal to or less than the predictive detection level, it may be determined that the apparatus is not abnormal, but is in a predictive stage of abnormality.
Further, the warning indicator 25 monitors the transition of the history data, and thereby, when the degree of coincidence suddenly becomes equal to or lower than the warning detection level, the warning indicator does not immediately determine the warning stage as an abnormal warning, but can determine whether the warning stage is a warning stage by observing the future transition of the degree of coincidence.
Next, a series of operations of the self-diagnosis function for executing the voice recognition process in the voice call registration device for an elevator shown in fig. 3 will be described with reference to a flowchart. Fig. 4 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device 20 for an elevator according to embodiment 2 of the present invention.
The flowchart of embodiment 2 shown in fig. 4 is different from the flowchart of embodiment 1 shown in fig. 2 in that step S201 and step S202 are further added. Therefore, the following description will focus on the processing of step S201 and step S202.
When it is determined in step S103 that the degree of coincidence is an allowable level abnormality, the process proceeds to step S201. Then, in step S201, the sign determiner 25 updates the history data by receiving the degree of coincidence calculated by the abnormality determiner 24. The warning indicator determiner 25 determines whether a state in which the degree of coincidence gradually decreases to a degree of coincidence equal to or lower than the warning detection level has occurred.
When it is determined that the reduced-coincidence state has occurred, the warning determiner 25 advances the process to step S202, and when it is determined that the abnormal warning stage is present, the series of processes is terminated.
On the other hand, when the sign determiner 25 determines that the coincidence decreasing state has not occurred, it is determined that the apparatus associated with the voice recognition processing is in a normal state and there is no sign of abnormality, so that it returns to step S101 to perform the next self-diagnosis.
As described above, according to embodiment 2, it is possible to determine whether or not there is a sign of an abnormality by monitoring the transition of the matching degree. As a result, in addition to the effects of embodiment 1, it is possible to perform maintenance such as repair or replacement of the device associated with the voice recognition processing by detecting a warning stage before the device becomes unusable due to occurrence of an abnormality.
Embodiment 3.
In embodiments 1 and 2, the timing of executing the self-diagnosis is not particularly specified. In contrast, in embodiment 3, a configuration in which a function of performing self-diagnosis after confirming that no passenger is present in the car or the hall is further added will be described. In the following description, a case where further functions are added to embodiment 2 will be described as a specific example.
Fig. 5 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 3 of the present invention. The voice call registration device 20 in embodiment 3 is configured to include a voice output device 21, a voice input device 22, a voice recognizer 23, an abnormality determiner 24, a warning determiner 25, and a person detector 26.
The configuration of embodiment 3 shown in fig. 5 differs from the configuration of embodiment 2 shown in fig. 3 in that a human detector 26 is further provided. Therefore, the following description focuses on this difference.
The human detector 26 has a function of detecting the presence or absence of a user at the car or the hall, and can use a human sensor or the like. When the human detector 26 determines that there is no user, a user absence signal is output to the voice output unit 21 to allow execution of self-diagnosis.
On the other hand, the voice outputter executes the self-diagnosis of the voice call registration described in the foregoing embodiments 1 and 2 only when the absence of the user signal is received from the human detector 26.
Next, a series of operations of the self-diagnosis function of executing the voice recognition process of the voice call registration device for an elevator shown in fig. 5 will be described with reference to a flowchart. Fig. 6 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device 20 for an elevator according to embodiment 3 of the present invention.
The flowchart of embodiment 3 shown in fig. 6 is different from the flowchart of embodiment 2 shown in fig. 4 in that step S301 is further added. Therefore, the following description will focus on the processing of step S301.
In step S301 at the front stage of step S101, the human detector 26 detects the presence or absence of a user at the car or the landing, and when there is no user, outputs a "user absent signal" to allow execution of self-diagnosis, and the process proceeds to step S101.
As described above, according to embodiment 3, the following configuration is provided: the presence or absence of a user at the car or the landing is detected, and when there is no user, self-diagnosis for determining the abnormality of the equipment can be performed. As a result, in addition to the effects of embodiments 1 and 2, it is possible to perform self-diagnosis for determining the presence or absence of an apparatus abnormality without being affected by the voice uttered by the user.
Embodiment 4.
In embodiment 4, a configuration in which a notification function when an abnormality is determined is added will be described. In the following description, a case where further functions are added to embodiment 3 will be described as a specific example.
Fig. 7 is an explanatory diagram showing a configuration of an elevator voice call registration device according to embodiment 4 of the present invention. The voice call registration device 20 in embodiment 4 is configured to include a voice output device 21, a voice input device 22, a voice recognizer 23, an abnormality determiner 24, a warning determiner 25, a person detector 26, and a notifier 27.
The configuration of embodiment 4 shown in fig. 7 differs from the configuration of embodiment 3 shown in fig. 5 in that a notification device 27 is further provided. Therefore, the following description focuses on this difference.
When it is determined by the abnormality determiner 24 that the apparatus is in an abnormal state, the notifier 27 receives an apparatus abnormal state detection signal from the abnormality determiner 24. Then, when the notifier 27 receives the device abnormality state detection signal, it notifies the abnormal state of the device to the car or the hall to notify the user that the device abnormality has occurred.
This notification enables the user to know that the call registration is not possible by voice input.
Next, a series of operations of the self-diagnosis function of performing the voice recognition process in the voice call registration device for an elevator shown in fig. 7 will be described with reference to a flowchart. Fig. 8 is a flowchart showing a series of operations for self-diagnosis of voice recognition processing performed by the voice call registration device 20 for an elevator in embodiment 4 of the present invention.
The flowchart of embodiment 4 shown in fig. 8 is different from the flowchart of embodiment 3 shown in fig. 6 in that step S401 is further added. Therefore, the following description will focus on the processing of step S401.
In step S401 after the determination of yes in step S301, the notifier 27 receives the device abnormality state detection signal from the abnormality determiner 24 to notify that a device abnormality has occurred, and notifies the user that the voice call registration function cannot be used, thereby ending a series of processing.
As described above, according to embodiment 4, the device abnormality notification device has a configuration capable of notifying a user of occurrence of a device abnormality when the device abnormality is detected. As a result, in addition to the effects of embodiments 1 to 3, the user can quickly determine whether or not the voice call registration is possible based on the notification information.
Thus, when the user knows that an abnormality has occurred in the device associated with the voice call registration, it is possible to perform a desired operation using a normal operation panel without performing useless voice call registration processing.
Claims (6)
1. An elevator voice call registration device is provided with:
a voice input device for acquiring call registration information spoken by a user as voice data; and
a voice recognizer that executes voice recognition processing for the voice data to generate floor information corresponding to the voice data, and performs call registration by transmitting the floor information to an elevator control device, wherein the voice call registration device for an elevator further comprises:
a voice outputter which converts the 1 st floor information into the 1 st voice and outputs the 1 st voice when performing self-diagnosis of the voice call registration function; and
an abnormality determiner that diagnoses whether the voice inputter and the voice recognizer function normally using the 1 st voice,
in the execution of the self-diagnosis,
the voice inputter converts the 1 st voice output from the voice outputter into 1 st voice data,
the voice recognizer performs voice recognition processing for the 1 st voice data, thereby generating 2 nd floor information corresponding to the 1 st voice data,
the abnormality determiner calculates a degree of coincidence between the 1 st floor information and the 2 nd floor information acquired from the voice recognizer, and determines that the 1 st floor information and the 2 nd floor information do not coincide with each other when the calculated degree of coincidence is lower than a preset allowable level, and determines that the result of the self-diagnosis is an abnormal state.
2. The voice call registration device of an elevator according to claim 1,
the voice call registration device for an elevator further includes a warning indicator which acquires the degree of coincidence calculated by the abnormality determiner each time the self-diagnosis is performed, thereby generating transition data of the degree of coincidence, and determines that the warning level is in a warning stage before reaching the abnormal state when it is determined that the degree of coincidence included in the transition data has transitioned to a warning detection level or less, the warning detection level being set in advance to a value higher than the allowable level.
3. The voice call registration device of an elevator according to claim 1 or 2, wherein,
the voice call registration device of the elevator is also provided with a human detector which detects whether a user is in the elevator car or the landing and outputs a signal that the user is absent when the user is absent,
the voice outputter receives the user absence signal from the person detector and determines that the self-diagnosis can be performed, thereby converting the 1 st floor information into the 1 st voice and outputting the 1 st voice.
4. The voice call registration device of an elevator according to claim 1 or 2, wherein,
the voice call registration device for an elevator further includes a notification device that notifies a user that the voice call registration function is not available when the abnormality determiner determines that the self-diagnosis result is in the abnormal state.
5. The voice call registration device of an elevator according to claim 3,
the voice call registration device for an elevator further includes a notification device that notifies a user that the voice call registration function is not available when the abnormality determiner determines that the self-diagnosis result is in the abnormal state.
6. A self-diagnosis method of a voice call registration function, which is executed in a voice call registration device that performs call registration by voice based on call registration information spoken by a user, the self-diagnosis method of the voice call registration function comprising:
a 1 st step of converting the 1 st floor information into a 1 st voice and outputting the voice when performing self-diagnosis in the 1 st step;
a 2 nd step of converting the 1 st voice output by the voice in the 1 st step into 1 st voice data;
a 3 rd step of generating 2 nd floor information corresponding to the 1 st voice data by performing voice recognition processing for the 1 st voice data converted in the 2 nd step in the 3 rd step;
a 4 th step of calculating a matching degree between the 1 st floor information and the 2 nd floor information generated in the 3 rd step in the 4 th step; and
a 5 th step of determining that the 1 st floor information does not match the 2 nd floor information when the matching degree calculated in the 4 th step is lower than a preset allowable level in the 5 th step, and determining that the self-diagnosis result is in an abnormal state.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/066628 WO2017208444A1 (en) | 2016-06-03 | 2016-06-03 | Elevator voice call registration device for elevators, and self-diagnostic method for voice call registration function |
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| Publication Number | Publication Date |
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| CN109153530A CN109153530A (en) | 2019-01-04 |
| CN109153530B true CN109153530B (en) | 2020-01-10 |
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| CN201680086049.0A Active CN109153530B (en) | 2016-06-03 | 2016-06-03 | Voice call registration device for elevator and self-diagnosis method for voice call registration function |
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| Country | Link |
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| JP (1) | JP6567180B2 (en) |
| CN (1) | CN109153530B (en) |
| WO (1) | WO2017208444A1 (en) |
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| JP7214979B2 (en) * | 2018-05-23 | 2023-01-31 | 株式会社Ｇｓユアサ | Management device and failure judgment method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3804209A (en) * | 1973-03-12 | 1974-04-16 | Westinghouse Electric Corp | Elevator system |
| CN86203494U (en) * | 1986-05-27 | 1987-06-24 | 宋文阁 | Computer-controlling unit for elevator |
| JP2974486B2 (en) * | 1992-03-02 | 1999-11-10 | 株式会社日立ビルシステム | Elevator diagnostic driving device |
| CN1361057A (en) * | 2000-12-28 | 2002-07-31 | 北京市金洋电梯有限公司 | Elevator network control system and its data transmission method |
| JP4801458B2 (en) * | 2006-02-07 | 2011-10-26 | 株式会社日立製作所 | Elevator control device |
| CN101259928B (en) * | 2007-03-05 | 2013-06-19 | 铃木电梯（中国）有限公司 | Elevator control system with black box |
| CN102239099B (en) * | 2008-12-11 | 2013-06-26 | 三菱电机株式会社 | Elevator controller |
| JP5601419B2 (en) * | 2011-03-25 | 2014-10-08 | 三菱電機株式会社 | Elevator call registration device |
| JP5794896B2 (en) * | 2011-11-10 | 2015-10-14 | 三菱電機株式会社 | Voice registration apparatus and voice registration method |
| JP5996479B2 (en) * | 2013-04-09 | 2016-09-21 | 株式会社日立ビルシステム | Call inspection system for elevator emergency call equipment |
-
2016
- 2016-06-03 JP JP2018520322A patent/JP6567180B2/en active Active
- 2016-06-03 CN CN201680086049.0A patent/CN109153530B/en active Active
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| JP6567180B2 (en) | 2019-08-28 |
| CN109153530A (en) | 2019-01-04 |
| JPWO2017208444A1 (en) | 2018-09-13 |
| WO2017208444A1 (en) | 2017-12-07 |
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