摘要:
A system for detecting a person relative to a passenger conveyor includes a driving circuit for supplying an oscillating drive signal to a first electrode of a capacitive sensor configured to produce an electric field toward a second electrode in response to the oscillating drive signal. A detection circuit is connected to the capacitive sensor, and produces an output as a function of the capacitance of the capacitive sensor, such that the detection circuit senses a change in capacitance of the capacitive sensor, such as when a person enters the electric field between the first and second electrodes. A controller is responsive to the change in capacitance sensed by the detection circuit to selectively adjust an operation mode of the passenger conveyor.
摘要:
A system for detecting a person relative to a passenger conveyor includes a driving circuit for supplying an oscillating drive signal to a first electrode of a capacitive sensor configured to produce an electric field toward a second electrode in response to the oscillating drive signal. A detection circuit is connected to the capacitive sensor, and produces an output as a function of the capacitance of the capacitive sensor, such that the detection circuit senses a change in capacitance of the capacitive sensor, such as when a person enters the electric field between the first and second electrodes. A controller is responsive to the change in capacitance sensed by the detection circuit to selectively adjust an operation mode of the passenger conveyor.
摘要:
Heat in a drive system including a motor and a drive is removed using heat pipes in heat exchanging contact with the motor and the drive. The heat conducting element have at least one portion for receiving heat from the motor or the drive, and another portion to transfer heat to a heat exchange device that is spaced from the motor and drive. The heat conducting element may be a heat pipe or a heat spreader element.
摘要:
An elevator load bearing member (30) monitoring device includes a controller (42) that applies a selected electrical signal to tension members (32) of the load bearing member (30). In one example, connectors (40) are associated with ends of the load bearing member (30) to establish an electrical interface between the controller (42) and the tension members (32). The connectors (40) facilitate establishing electrical circuit loops along the tension members (32) such that only non-adjacent tension members are energized at a selected time. A variety of circuit configurations are disclosed. The applied electrical signal in one example has a potential that is negative compared to a ground potential of a hoistway in which the elevator belt is used. In another example, the electrical signal comprises a plurality of pulses and has a duty cycle that is on the order of about one percent.
摘要:
Upon request from a power utility to reduce the electrical demand of a building, an elevator system is automatically disconnected from power being delivered by the power utility (or remains connected but receives limited power from the power utility), and a secondary power storage device is connected to the power bus of the elevator system. The secondary power storage device provides power to the elevator system during a period in which the request to reduce electrical load of the building is in effect. When the request end, the elevator system is automatically reconnected to the power delivered by the power utility and can potentially work in a hybrid mode.
摘要:
A connector device (40) for making electrically conductive connections with at least one tension member (32) in an elevator load bearing member (30) includes a spacer member (42) that establishes physical spacing between portions (38) of the load bearing member (30). In one example, each portion (38) includes one tension member (32). A holding member (50) secures the portions (38) in a selected position relative to the connector device. At least one electrically conductive connector member (70) makes electrically conductive contact with at least one of the tension members (32) to facilitate a selected electricity-based monitoring technique for accessing the condition of the load bearing member.
摘要:
An elevator load bearing member (30) monitoring device includes a controller (42) that applies a selected electrical signal to tension members (32) of the load bearing member (30). In one example, connectors (40) are associated with ends of the load bearing member (30) to establish an electrical interface between the controller (42) and the tension members (32). The connectors (40) facilitate establishing electrical circuit loops along the tension members (32) such that only non-adjacent tension members are energized at a selected time. A variety of circuit configurations are disclosed. The applied electrical signal in one example has a potential that is negative compared to a ground potential of a hoistway in which the elevator belt is used. In another example, the electrical signal comprises a plurality of pulses and has a duty cycle that is on the order of about one percent.
摘要:
A device (30) for making electrically conductive contact with at least one tension member in an elevator belt (22) also provides a restraining feature to support loads on the belt. A connector portion (32) is secured to the belt. In one example, the connector portion (32) includes clamping members (40, 42) that are received on opposite sides of the belt. One of the clamping members supports a plurality of electrically conductive connector members (52) that establish electrical contact with selected tension members (24) within the belt (22). A plurality of load transferring members (66) are supported by the other clamping member in one example. A restraining portion (34) is adapted to be secured in a fixed position relative to a selected structure (36) within the elevator system. An opening (38) through the restraining portion (34) allows the belt (22) to pass but prevents the connector portion (32) from moving beyond the restraining portion (34) as the outside dimension of the connector portion (32) is larger than the size of the opening (38). In one example, high temperature resistant materials such as steel or ceramics are used for the restraining portion (34) and the clamping members (40, 42).
摘要:
An elevator load bearing member (22) monitoring device (20) has a controller (30) that applies a first signal (40) and a second signal (50) to at least one tension member (24) in the belt. The first signal (40) in one example has a plurality of (42) of a selected amplitude and duration. The second signal (50) includes a series of pulses (52) having a second, shorter duration and lower amplitude. The first signal is useful for providing information regarding a wear condition of the load bearing member. The controller utilizes a response to the second signal to determine a failure condition such as a broken load bearing member.
摘要:
The present invention relates to a method for forming an article having a protective ceramic coating which reduces radiation heat transport through the ceramic coating. The protective ceramic coating includes one or more embedded reflective metallic layers for reducing the radiation heat transport. The method for forming the protective coating broadly comprises the steps of forming a ceramic coating on a substrate and embedding at least one reflective metallic layer within the ceramic coating.