Elevator door sensor fusion, fault detection and service notification
阅读说明:本技术 电梯门传感器融合、故障检测和服务通知 (Elevator door sensor fusion, fault detection and service notification ) 是由 M.J.特雷西 W.T.施密特 A.萨蒂 于 2019-08-19 设计创作,主要内容包括:提供了一种用于电梯门传感器融合、故障检测和服务通知的系统。所述系统包括:处理器;以及存储器,所述存储器包括计算机可执行指令,所述指令当由所述处理器执行时,使所述处理器执行操作。操作包括监测多个传感器的输出。确定多个传感器的输出是否遵循预期模式。至少部分基于确定多个传感器的输出不遵循预期模式:识别多个传感器中不遵循预期模式的传感器,并且传送指示该传感器正表现出意外行为的通知。(A system for elevator door sensor fusion, fault detection, and service notification is provided. The system comprises: a processor; and a memory including computer-executable instructions that, when executed by the processor, cause the processor to perform operations. The operations include monitoring outputs of a plurality of sensors. It is determined whether the outputs of the plurality of sensors follow a desired pattern. Based at least in part on determining that the outputs of the plurality of sensors do not follow an expected pattern: a sensor of the plurality of sensors that is not following the expected pattern is identified and a notification is transmitted indicating that the sensor is exhibiting unexpected behavior.)
1. A system configured to detect sensor failure, the system comprising:
a processor; and
a memory comprising computer-executable instructions that, when executed by the processor, cause the processor to perform operations comprising:
monitoring the output of a plurality of sensors;
determining whether the outputs of the plurality of sensors follow an expected pattern; and
based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern:
identifying sensors of the plurality of sensors that do not follow the expected pattern; and
transmitting a notification indicating that the sensor is exhibiting unexpected behavior.
2. The system of claim 1, wherein the expected pattern comprises a maximum elapsed time between an output from the sensor and an output from a second sensor of the plurality of sensors.
3. The system of claim 1, wherein the expected pattern comprises a minimum frequency of output from the sensor.
4. The system of claim 1, wherein the expected pattern comprises an output from a second sensor occurring after an output from the sensor.
5. The system of claim 1, wherein the plurality of sensors detect objects proximate an elevator door of an elevator.
6. The system of claim 5, wherein the operations further comprise moving the elevator to a nudge mode based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
7. The system of claim 5, wherein the operations further comprise removing the elevator from service based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
8. The system of claim 1, wherein the sensor is a volume sensor.
9. The system of claim 1, wherein the sensor is a light curtain sensor.
10. The system of claim 1, wherein the operations further comprise updating the expected pattern based at least in part on the outputs of the plurality of sensors.
11. The system of claim 1, wherein the operations further comprise updating the expected pattern based at least in part on user input.
12. The system of claim 1, wherein the operations further comprise updating the expected pattern based at least in part on the outputs of the plurality of sensors and user inputs.
13. A method of detecting a sensor fault, the method comprising:
monitoring the output of a plurality of sensors;
determining whether the outputs of the plurality of sensors follow an expected pattern; and
based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern:
identifying sensors of the plurality of sensors that do not follow the expected pattern; and
transmitting a notification indicating that the sensor is exhibiting unexpected behavior.
14. The method of claim 13, wherein the expected pattern comprises a maximum elapsed time between an output from the sensor and an output from a second sensor of the plurality of sensors.
15. The method of claim 13, wherein the expected pattern comprises a minimum frequency of output from the sensor.
16. The method of claim 13, wherein the expected pattern comprises an output from a second sensor occurring after an output from the sensor.
17. The method of claim 13, wherein the plurality of sensors detect an object proximate an elevator door of an elevator, and the method further comprises moving the elevator to a nudge mode based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
18. The method of claim 13, wherein the plurality of sensors detect objects proximate elevator doors of an elevator, and the method further comprises removing the elevator from service based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
19. The method of claim 13, wherein the method further comprises updating the expected pattern based at least in part on the outputs of the plurality of sensors.
20. The method of claim 13, wherein the method further comprises updating the expected pattern based at least in part on user input.
Technical Field
The subject matter disclosed herein relates to the field of elevator sensors that detect the presence of passengers, and more particularly, to elevator door sensor fusion, fault detection, and service notification.
Background
Many elevator safety events are related to passenger and door interactions and door impacts. Sensing in the door plane is currently required by code (as specified, for example, in the american society of mechanical engineers a 17.1) and is typically achieved by using light curtain sensors. If a fault is detected in the light curtain sensor, the elevator is placed in nudge mode until the light curtain sensor is repaired. To counteract the possibility of door strikes, new elevator systems may use multiple sensors. Multiple sensors are commonly used in tandem to sense passengers as they approach the doors and to initiate door reversal before the elevator sill is breached.
Disclosure of Invention
According to an embodiment, a system configured to perform elevator door sensor fusion, fault detection, and service notification is provided. The system comprises: a processor; and a memory including computer-executable instructions that, when executed by the processor, cause the processor to perform operations. The operations include monitoring outputs of a plurality of sensors. Determining whether the outputs of the plurality of sensors follow an expected pattern. Based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern: identifying a sensor of the plurality of sensors that does not follow the expected pattern, and transmitting a notification indicating that the sensor is exhibiting unexpected behavior.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the expected pattern includes a maximum elapsed time between an output from the sensor and an output from a second sensor of the plurality of sensors.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the expected pattern includes a minimum frequency of output from the sensor.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the expected pattern includes an output from a second sensor occurring after an output from the sensor.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the plurality of sensors detect objects approaching an elevator door of the elevator.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the operations further comprise moving the elevator to a nudge mode based at least in part on determining that the outputs of the plurality of sensors do not follow the expected mode.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the operations further comprise removing the elevator from service based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the sensor is a volume sensor.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the sensor is a light curtain sensor.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the operations further include replacing the sensor based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the operations further include updating the expected pattern based at least in part on user input.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the system may include: the operations further comprise updating the expected pattern based at least in part on the outputs of the plurality of sensors and user inputs.
According to an embodiment, a method of performing elevator door sensor fusion, fault detection, and service notification is provided. The method includes monitoring outputs of a plurality of sensors. Determining whether the outputs of the plurality of sensors follow an expected pattern. Based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern: identifying a sensor of the plurality of sensors that does not follow the expected pattern, and transmitting a notification indicating that the sensor is exhibiting unexpected behavior.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the expected pattern includes a maximum elapsed time between an output from the sensor and an output from a second sensor of the plurality of sensors.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the expected pattern includes a minimum frequency of output from the sensor.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the expected pattern includes an output from a second sensor occurring after an output from the sensor.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the plurality of sensors detect objects proximate elevator doors of an elevator, and the method further comprises moving the elevator to a nudge mode based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the plurality of sensors detect objects proximate elevator doors of an elevator, and the method further comprises removing the elevator from service based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the operations further include updating the expected pattern based at least in part on user input.
In addition to, or as an alternative to, one or more features described herein, further embodiments of the method may include: the operations further comprise updating the expected pattern based at least in part on the outputs of the plurality of sensors and user inputs.
Technical effects of embodiments of the present disclosure include improved identification of sensor failures of users through sensor fusion and failure detection. Technical effects may also include enhanced passenger experience and better customer satisfaction by quickly relaying fault conditions to elevator service providers. The technical effect may further include ensuring robust sensor communication even when the sensor is in a failure state, such that the elevator is not prematurely forced into nudge mode, and operation continues in the safest state possible (e.g., nudge for code sensor failures, normal operation for non-code sensor failures) until a repair occurs.
The foregoing features and elements may be combined in various combinations, not exclusively, unless explicitly indicated otherwise. These features and elements, as well as their operation, will become more apparent from the following description and the accompanying drawings. It is to be understood, however, that the following description and the accompanying drawings are intended to be illustrative and explanatory in nature, and not restrictive.
Drawings
The present disclosure is illustrated by way of example and not limited in the accompanying figures in which like references indicate similar elements.
Fig. 1 is a schematic illustration of an elevator system that can employ various embodiments of the present disclosure;
fig. 2 is a simplified perspective view of a passenger detected by multiple sensors near an elevator door according to one or more embodiments of the present disclosure;
fig. 3 is a schematic diagram of a system for elevator door sensor fusion, fault detection, and service notification in accordance with one or more embodiments of the present disclosure; and
fig. 4 is a flow diagram illustrating a method of elevator door sensor fusion, fault detection, and service notification in accordance with one or more embodiments of the present disclosure.
Detailed Description
One or more embodiments of the present disclosure utilize multiple sensors to detect passenger presence and self-evaluate sensor health. If one or more sensors that normally follow a particular pattern no longer do so, this information can be used to identify faults within the sensors and preventative action can be taken to proactively ensure passenger safety. If the sensor associated with code compliance is deemed to be in a fault state, the elevator can be stopped or forced into a nudge mode and the elevator service provider can be contacted to ensure immediate resolution of the problem. In the event that the secondary sensor experiences a failure, the elevator may continue to operate in a normal manner (e.g., not forced into a nudge mode), the sensor of interest may be temporarily disabled, and a notification may be sent to the elevator service provider to resolve sooner or better.
In one or more embodiments of the invention, sensor health is self-assessed by monitoring actual sensor outputs and comparing them to expected sensor output patterns. If the actual output from the sensors contradicts the expected behavior of the sensors, sensor fusion will identify unexpected behavior and determine a series of actions that maximize occupant safety. For code-related sensors with unexpected behavior (those required for code compliance), the elevator may be forced into nudge mode and send a high priority notification to the elevator service provider to make repairs. For non-code dependent sensors exhibiting unexpected behavior (those sensors not needed for code compliance), the elevator may continue to operate normally and send a secondary priority notification to the elevator service provider.
As used herein, the term "sensor fusion" refers to the use of sensor outputs from multiple sensors that are combined into a single result. For example, sensor outputs from the light curtain sensor and the volume sensor may be combined to send a single command to the door controller of the elevator. In this example, the output from the light curtain sensor and the output from the volume sensor are fused to create a single command to control the operation of the elevator doors. In another example, sensor outputs from the light curtain sensor and the volume sensor are combined to determine whether the volume sensor is exhibiting the expected behavior. In this example, the sensor output from the light curtain sensor is expected to be generated within a threshold amount of time of generating the output from the volume sensor, and the timing of the outputs is fused to determine whether the sensor is operating in an expected manner. In one or more embodiments, the output from the sensor includes a timestamp indicating the exact time that the sensor creating the output was triggered.
As used herein, the term "nudge mode" refers to an elevator mode in which the doors are slowly closed while a buzzer or a tone (tonetones) signals the passengers to avoid the doors.
As used herein, the term "service provider" refers to any person or entity that is monitoring the condition of a product, such as an elevator. Upon notifying that an element of the product is exhibiting unexpected behavior (e.g., the sensor is not operating as expected), the service provider either repairs the product or notifies the correct organization to repair the product.
Embodiments of the invention are not limited to environments including elevators. Embodiments may be implemented in any environment in which sensors are used to indicate the presence of a person and the sensors track the expected patterns of the person in the environment.
Fig. 1 is a perspective view of an elevator system 101, the elevator system 101 including an
The tension member 107 engages a machine 111, the machine 111 being part of an overhead structure of the elevator system 101. The machine 111 is configured to control movement between the
As shown, the controller 115 is located in a controller room 121 of the elevator shaft 117 and is configured to control operation of the elevator system 101, and in particular the
The machine 111 may include a motor or similar drive mechanism. According to an embodiment of the present disclosure, the machine 111 is configured to include an electrically driven motor. The power supply to the motor may be any power source, including the power grid, which is supplied to the motor along with other components. The machine 111 may include a traction sheave that transmits force to the tension member 107 to move the
Although shown and described with a roping system including tension members 107, elevator systems employing other methods and mechanisms for moving an elevator car within an elevator hoistway may employ embodiments of the present disclosure. For example, embodiments may be used in a ropeless elevator system that uses a linear motor to impart motion to an elevator car. Embodiments may also be used in ropeless elevator systems that use a hydraulic hoist to impart motion to an elevator car. Fig. 1 is a non-limiting example presented for purposes of illustration and explanation only.
In other embodiments, the system includes a conveyor system that moves passengers between floors and/or along a single floor. Such transport systems may include escalators, people mover, and the like. Thus, the embodiments described herein are not limited to elevator systems such as that shown in fig. 1.
Turning now to fig. 2, a
As shown in fig. 2,
Although it is possible to have a situation where the
One or more embodiments of sensor fusion and fault detection can be used with any combination of sensors positioned to detect people near elevator thresholds, such as, but not limited to: light curtain sensors, volume sensors, motion detector sensors, door edge detector sensors, door frame detector sensors, and cameras. One or more embodiments can be implemented with more than two sensors, and the sensors can be located inside or outside of the elevator car 103 (as shown in fig. 2). In one or more embodiments, more than one sensor of each type of sensor may be monitoring passengers entering the
Turning now to fig. 3, a schematic diagram of a system 300 for elevator door sensor fusion, fault detection, and service notification is generally shown, in accordance with one or more embodiments of the present disclosure. The system 300 shown in fig. 3 includes a
As shown in fig. 3, the logic card 302 includes sensor fusion logic 304, fault detection logic 306, and service notification logic 308. The sensor fusion logic 304 receives sensor output from a sensor that is monitoring the entry of passengers into an elevator car (such as the
In one or more embodiments, the fault detection logic 306 compares the expected pattern of sensor outputs to the received or actual pattern of sensor outputs. The expected pattern can be applied to expected outputs from a single sensor and expected output sequences for multiple sensors. An example mode is that it may be expected that the
The expected sensor output pattern may be entered by a user (such as a system administrator) via a user interface. Additionally or alternatively, an expected sensor output pattern may be generated and updated based on an observed pattern of sensor outputs. Alternatively, the expected sensor output pattern may be entered by a system administrator and then updated based on the observed pattern. For example, a system administrator may enter an expected elapsed time between two sensors being triggered. The actual amount of time observed based on the sensor output may be longer than the expected elapsed time, and the system may update the expected elapsed time to the longer amount of time.
In one or more embodiments, the fault detection logic 306 determines or selects an action to take based at least in part on detecting a sensor that does not follow the expected pattern(s). The selection can be based on the type of sensor that does not follow the expected pattern (e.g., code or non-code dependent). The action may include changing the operating mode of the elevator to a nudge mode or removing the elevator car from service. This action can be communicated to
The actions determined by the fault detection logic 306 may also include generating an alert to be sent to the elevator service provider 310. The alert may be sent by the service notification logic 308 to the elevator service provider 310. The alert can be communicated to the elevator service provider 310 via a communication interface, which can be accomplished through any short or long range wired or wireless communication method known in the art, through a network such as, but not limited to, the internet, a Local Area Network (LAN), a Wide Area Network (WAN), and a cellular network.
Although not shown, the logic card 302 can include hardware devices, such as a processor for executing the sensor fusion logic 304, the fault detection logic 306, and the service notification logic 308, which can each include hardware instructions and/or software instructions. The processor may be a custom made or commercially available processor, a Central Processing Unit (CPU), an auxiliary processor among several processors, a semiconductor based microprocessor (in the form of a microchip or chip set), a macroprocessor, or other means for executing instructions. In addition, the logic card 302 may include memory for storing instructions and desired patterns. The memory may include one or a combination of the following: volatile memory elements (e.g., random access memory RAM, such as DRAM, SRAM, SDRAM, and the like) and nonvolatile memory elements (e.g., ROM, Erasable Programmable Read Only Memory (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Programmable Read Only Memory (PROM), magnetic tape, compact disc read only memory (CD-ROM), disks, magnetic disks, cartridges, tape cards, and the like). The instructions in the memory may comprise one or more separate programs, each program comprising an ordered listing of executable instructions for implementing logical functions. In an embodiment, the instructions are executed in the cloud.
It should be understood that although specific elements are defined separately in the schematic block diagram of fig. 3, each or any of the elements may be otherwise combined or separated via hardware and/or software.
Turning now to fig. 4, a flow diagram 400 illustrating a method of elevator door sensor fusion, fault detection, and service notification is generally shown, in accordance with one or more embodiments of the present disclosure. In accordance with one or more embodiments, all or a subset of the processing shown in fig. 4 is performed by the logic card 302 of fig. 3 and/or by computer instructions located in the cloud. At
At
The expected pattern may also specify a sequence of outputs from two or more sensors, e.g., a first sensor is expected to be triggered before a second sensor. The expected pattern may further specify a relative amount of output expected from each sensor, e.g., a first sensor is expected to be triggered twice as often as a second. The expected pattern may further specify an expected or minimum frequency at which the sensor is to be triggered during a particular time period. The time period may be a number of hours, days or months. The time period may also specify other parameters such as the time of day or month, etc. For example, it is contemplated that the first sensor is triggered at least once per hour during the morning hours of the work day.
If it is determined at
If it is determined at
While the above description has described the flow of fig. 4 in a particular order, it should be understood that the order of the steps may be changed unless otherwise specifically claimed in the appended claims.
As described above, embodiments can take the form of processor-implemented processes and apparatuses (such as processors) for practicing those processes. Embodiments can also take the form of computer program code containing instructions embodied in tangible media, such as network cloud storage, SD cards, flash drives, floppy diskettes, CD ROMs, hard drives, or any other computer-readable storage medium, wherein, when the computer program code is loaded into and executed by a computer, the computer becomes an apparatus for practicing the embodiments. Embodiments can also take the form of computer program code, for example, whether stored in a storage medium, loaded into and/or executed by a computer, or transmitted over some transmission medium, such as over electrical wiring or cabling, through fiber optics, or via electromagnetic radiation, wherein, when the computer program code is loaded into and executed by a computer, the computer becomes an apparatus for practicing the embodiments. When implemented on a general-purpose microprocessor, the computer program code segments configure the microprocessor to create specific logic circuits.
The term "about" is intended to include a degree of error associated with a measurement based on a particular quantity of equipment and/or manufacturing tolerances available at the time of filing the application.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, element components, and/or groups thereof.
Those skilled in the art will understand that various exemplary embodiments have been illustrated and described herein, each having certain features in certain embodiments, but the disclosure is not so limited. Rather, the disclosure can be modified to incorporate any number of variations, alterations, substitutions, combinations, sub-combinations or equivalent arrangements not heretofore described, but which are commensurate with the scope of the disclosure. Additionally, while various embodiments of the disclosure have been described, it is to be understood that aspects of the disclosure may include only some of the described embodiments. Accordingly, the disclosure is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.
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