Mitsubishi Denki Kabushiki Kaisha

Tsuyoshi Satoh

Kenzo Tachino

Nobuo Anzai

A control apparatus for elevator system comprises a direction command device which outputs an ascending command signal or a descending command signal for a cage of an elevator; a driving signal generating device which outputs an ascending driving signal or a descending driving signal depending upon a driving direction of the cage of the elevator and a driving distance; and a detecting comparator which detects the ascending driving signal during non-output of the ascending command signal, and detects the descending driving signal during non-output of the descending command signal and outputs a command signal when the ascending driving signal or the descending driving signal is increased over a predetermined value.

Control apparatus for elevator system

A plurality of identical signal delay elements are disposed within a hoistway one for each landing floor and cascade connected to a signal generator. Each delay element is located at its position where a signal from the signal generator appears at its output with a time delay corresponding to the associated floor. The delayed signal is detected by a signal detector disposed on an elevator car stopped on or traveling past any of the floor. A time delay measurement device counts clock pulses occurring between the detected signal and the signal from the signal generator to determine a time delay between both signal and therefore the floor on which the elevator car stops, or past which it is traveling.

Elevator position detector

An elevator control system using an electric type floor selector is disclosed including a unit provided at at least one of the specific floors in the hoistway and for indicating the specific floor, units provided at the other floors than the specific floors and for indicating merely the floor, a detector provided at a car in which presence of both the units is detected and when the detector levels with the respective units the detector generates a signal corresponding to it, a floor indicator for indicating the floor at which the car actually stops by using the detected signal, and a stop permissible floor indicator for indicating the electrically calculated stop floor when the car stops. Comparison is made of the output of the floor indicator with the output of the stop permissible floor indicator. In the comparison, when these outputs are different, the car is moved to the specific floor. When the car stops at the specific floor, the floor indicator and the stop permissible floor indicator are set to the specific floor.

Elevator control system

During the acceleration of an elevator car frequency modulated clock pulses are counted up by a first counter to generate a command speed pattern. A second counter similarly generates a second speed pattern identical in shape to and delayed a predetermined time relative to the command speed pattern. A randum access memory successively stores theoretical distances of movement of the car due to the command speed pattern suitably corrected and the second speed pattern as a distance-to-speed function. When and after both patterns first equal each other, a command deceleration pattern is generated to follow objectives or the distance-to-speed function. Once the command speed again equalled the objective, the intact distance-to-speed function is used as a command deceleration pattern concerning residual distances to a stop floor.

Elevator speed control system

During the acceleration of an elevator car a command acceleration pattern in the form of frequency modulated clock pulses is counted by a first and a second counter. The first counter issues a command speed pattern. The speed pattern is integrated to calculate the distances of movement of the care which is successively stored in a random access memory at addresses determined by the speeds from the second counter, at equal increments of speed. During the deceleration the distances of movement succesively read out from the memory are compared with the residual distances to the stop floor and the second counter counts the results of the comparison down to produce an ideal speed curve. The curve supplied to the memory is also compared with the actual car speed to modify the command acceleration with the result that the actual speed follows up the ideal speed curve.

A position sensor disposed on an elevator car has a first rotatable shaft connected to a secondary winding of a transformer or a switch actuating member, and a second rotatable shaft coaxial with the first shaft and connected to a primary transformer winding or to a switch position changing member. A first roller engages a rod-shaped cam mounted at an angle to a guide rail for the car toward the end of the path of travel of the car to rotate the first shaft in a direction to decrease the voltage across the secondary winding or successively actuate the switches. If the car moves horizontally, the first shaft is rotated to change the voltage and a second roller engaging the rail rotates a second shaft to compensate for this change in voltage.

Position sensor device for elevator car

An elevator speed control apparatus is disclosed comprising: an ideal velocity generator for generating a velocity ideal for the cage to travel the distance to a floor the cage is to land; a velocity detector for detecting the velocity of the cage in motion; a comparator for comparing the actual cage velocity data supplied from the velocity detector with the ideal velocity data supplied from the ideal velocity generator; an acceleration setting device for setting an acceleration for the cage; an acceleration modifying device operated by the output of the comparator, for modifying the acceleration data supplied from the acceleration modifying device; a command velocity pattern generator for integrating with time the acceleration data supplied from the acceleration modifying device and thus generating a command velocity pattern; and a motor driving device for controlling the cage hoist driving motor according to the command velocity pattern; wherein an ideal cage velocity is maintained by modifying the acceleration data according to the output of the comparator.

Elevator speed control apparatus

A position-indicating signal equipment for elevator comprises

Position-indicating signal equipment for elevator

A signal transmitter supplies a contact closure type signal having a DC level to an electromagnetic coil inductively disposed around a magnetic core. The coil produces a corresponding magnetic flux which is, in turn, detected by a flux detector such as a Hall effect semiconductor element. The detector applies a signal corresponding to the detected magnetic flux to a signal receiver.

Signal transmission system

A pulse generator supplies to a logic unit, pulses the number of which is determined by the amount of movement of an elevator car. The logic unit effects the algorithm and comparison of the amount of movement of the car and a command amount of movement of the car to produce a speed signal which, in turn, controls the car. The pulses are also stored in a memory and an electric source energizes the memory and the pulse generator for a predetermined time after the occurrence of an emergency.

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Inazawa, Japan

Tsuyoshi Satoh