Shortening waiting times and reducing the probability of a long wait are always the most critical problems for group control elevators. Escort has been striving for the development of control algorithms to solve these problems.
Escort Destination Floor Reservation System
"DFRS" leads passengers more smartly to their destination floors. By learning elevator usage data on a daily basis, DFRS controls to give priority to handling capacity for congested floors such as morning up peak. Moreover, DFRS saves energy according to the traffic situation.
What is the destination floor reservation system?
In the destination floor reservation system, as passengers register their destination floor at the hall, the elevator car to be used by each passenger can be informed ahead of time to the passenger, meaning the system can reduce congestion at the hall.
In addition, Escort DFRS improves handling capacity and saves energy by original technology.
Conventional group controls
As each passenger waits in front of the first arriving elevator, the area is overcrowded.
Destination floor reservation system
As each passenger waits in front of the assigned elevator to arrive, congestion can be reduced.
Usage of Elevator with DFRS :
In DFRS, the conventional hall buttons (Up and Down arrows) located at the elevator lobby are replaced by the destination floor registration devices. Passengers register their destination floor through these devices at the lobby instead of in the elevator.
Register your destination floor
Move to the front of assigned elevator
Go to your destination floor
Each passenger (even if passengers are going to same destination floors) needs to register the destination floor individually so as to allow DFRS to effectively calculate the number of passengers being assigned to each elevator (to prevent elevators overloading and passengers waiting in vain for an elevator).
Passenger who can not board the assigned elevator has to re-register the destination floor.
If unusual registrations are present (i.e. one passenger enters multiple destination floors), DFRS will not be able to identify these unusual calls, and still process these destination floors accordingly.
Escort Group Corporate Environmental Management
Toward the Resolution of Global Environmental Issues.
Three Environmental Pillars of Our Vision:
Prevention of Global Warming, Conservation of Resources, and Preservation of Ecosystem.
The Escort Environmental Vision:
The quest for a comfortable life has led humankind to create a society based on convenience. However, environmental problems have surfaced, such as climate change, resource depletion, and ecosystem destruction. To realize a material-cycle society in harmony with the earth, we must share our vision and promote environmental conservation. We have created an environmental vision to achieve a more sustainable society by promoting global production that reduces the environmental burden of a product throughout its life cycle. We have formulated Environmental Vision 2030, a long-term plan placing priority on preventing global warming, and we are conducting our business activities accordingly.
To realize our Environmental Vision, we promote activities in accord with the Escort Action Guidelines for Environmental Conservation.These guidelines are based on the corporate credo of contributing to society through the development of superior, original technology and products as stated in the Standards of Corporate Conduct.Escort Group Corporate Environmental Management Escort Group Corporate Environmental Management
Multiple Disc Brakes
Efficient braking power and swift response is required in the braking systems of ultra high-speed, large-capacity traction machines.
Escort uses braking materials that are able to withstand high surface pressure at high speeds in order to achieve the levels of braking power required. Conventional brakes operate on a drum system, but the development of technology that provides optimal control over multiple electromagnetic coils on disc systems has led to even greater stopping power and allowed them to be manufactured in a compact size.
The placement of the multiple electromagnetic coils in consideration of a fail-safe system has also improved safety.
Multiple Emergency Stop Devices
The emergency stop systems on ultra high-speed, large-capacity elevators require functions to bring to a halt heavy elevator cars moving at ultra high speed with total safety. In order to obtain the braking power demanded by this, Escort uses materials of superior levels of wear-resistance and heat-resistance and with a high friction coefficient on the braking shoes used in emergency stop systems. We have also introduced multi-structure emergency braking systems that consist of two parallel devices, as opposed to the single device conventionally used, and this will provide support for the increased capacity and speed that can be expected in future elevators.
Control System Fitted with Long-Period Seismic Activity Sensors
The risks of long-period seismic activity are attracting more and more attention recently, and there is increased demand to ensure that high-rise buildings are able to withstand this.
Conventional methods for coping with this were to stop all elevators in the immediate aftermath of earthquakes until functions could be restored, and this required a long period of time.
Escort has developed sensors that calculate the amount of swing on cables in the real-time and allow elevators to continue operating safety in accordance with the results.
The use of technology that helps restore normal operations by measuring the levels of swing convergence, instead of simply halting operations, greatly contributes to BCP( Business Continuity Plan ) within building environments.
Traction Machines and Control Panels for Ultra High-Speed, Large-Capacity Elevators
Traction machines require acceleration and deceleration control that generates high levels of torque in order to move ultra high-speed, large-capacity elevators, which means that basic technology providing raw power is indispensable.
Escort uses PM motors (permanent magnetic synchronous motors) that are compact yet provide high output.
We have also incorporated the new technologies listed below within the control panels in order to cope with this large-capacity output.
These technologies will provide the cornerstone for the development of elevators into the future.
Active Guides for Reducing Lateral Vibration During Operations
The further the distance that elevators are required to travel, the more warping that occurs on the guide rails that are installed to ensure smooth operations and the more lateral vibration that appears in the elevator cars at high speeds.
Escort therefore developed active guide devices that are installed along the elevator guide rails to increase control over this vibration.
Data on the cars and acceleration speeds at certain points are fed back to these devices for the purpose of controlling the amount of pressure power applied to the guide rail rollers. As elevator car vibration only affects riding comfort, the devices consist of as few actuators, sensors and controllers as possible.
This provides the effect of the elevator car seeming to be at a stand still despite it moving at high speed. It is futuristic elevators like this that Hitachi is involved in developing.
Highly-Accurate Speed Control and Arrival Control technology
Contraction of the main cables on elevators required to travel distances exceeding 400 m leads to height differences and low-frequency vertical vibration at arrival stages where the passengers board and disembark.
Escort uses the latest microcomputers with high processing capabilities to control this, and this has enabled us to provide speed control and arrival control at higher levels of accuracy than previously available.
Capsule Structures and Bi-Layered Cars for Reducing Traveling Noise
Vast fluctuations in air flow are produced within shafts operating ultra high-speed elevators. This generates extremely loud wind noise within the elevator cars, which subjects the passengers to increased stress.
Escort therefore developed an aerodynamic capsule structure to reduce wind noise, and elevators cars with bi-layered structures to insulate them from background noise.
Elevator cars traveling as ultra high speed that are as quiet at forest landscapes. This is the level of silence Escort aims to develop.
Air-Pressure Adjustment Technology for Reducing Ear Blockage
Differences in air pressure are produced within shafts operating ultra high-speed, long-distance elevators, which results in the sensation of ear blockage in the passengers.
Escort has developed air-pressure adjustment technology to reduce passenger ear blockage within elevator cars.
Incorporating Energy-Saving Measures in Elevators
Escort is constantly incorporating energy-saving measures in elevators with the use of leading-edge technology.
The control systems and transitions to low-consumption power sources for middle-speed elevators are introduced below.
Escort will remain committed to actively developing energy-saving technology and environment-friendly technology into the future.
Resource-Saving Measures with Double-Deck Elevator Cars
The use of double-deck elevator cars for transporting large-capacity loads is increasing recently in accordance with the trend to build super high-rise buildings.
Double-deck elevator cars require a spacing adjustment function (floor spacing adjustment) to cope with the difference in the distances between floors in buildings. Although there are various floor-distance adjustment systems available, they all increase the weight of the elevator cars, which in turn increases the load on elevator operations.
Escort is currently involved in the development of a new lightweight floor-distance adjustment system that can be used in buildings with vast differences in floor-spacing distances.We are also using flexible steel sheeting for the elevator car frames to reduce the weight of the materials, thereby achieving more lightweight cars.
Measures such as these help us to cut down on overall weight even in large-capacity elevator systems and results in preventing excessive loads being placed on the elevator drive motors.
Escort will continue to take energy saving and resource saving into consideration and accept the challenge of developing technology to efficiently move large numbers of people within all types of buildings.