JP2006206200A - Elevator operating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator operating device capable of efficiently extracting long periodical vibration among the vibration caused by an earthquake to use it for emergency operation control. <P>SOLUTION: A band path filter circuit 17 extracts a long periodical vibration component on the basis of a difference between a real speed value, which is computed by a real speed computing circuit 12 on the basis of a pulse signal from a pulse generator for generating pulse signal in proportion to travelling distance of an elevator car, and a speed command value from a speed pattern command generating circuit 11. When the extracted vibration component is the predetermined value or more and continued for the predetermined time or more, occurrence of earthquake is determined for emergency operation control of the elevator. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator operating device, and more particularly to an elevator operating device that performs control operation when an earthquake occurs.

  In a conventional elevator operation device, when an earthquake occurs, as an elevator control operation device that detects the vibration of the earthquake and drives the control operation driving means to cause the elevator to perform the control operation, for example, when an earthquake occurs, the elevator is installed An acceleration sensor for detecting the acceleration of the vibration of the building and a storage means for storing the data of the resonance frequency measured in advance at the resonance measurement point in the building, and the acceleration of the vibration detected by the acceleration sensor is preset. When the measured reference value is exceeded, a first alarm signal is output, the frequency distribution characteristic of the acceleration of the vibration detected by the acceleration sensor is calculated, the frequency of the maximum distribution is compared with the resonance frequency, and the frequency of the maximum distribution If the resonance frequency and the resonance frequency coincide with each other within a preset deviation value, a second alarm signal is output and the control operation driving means is driven to perform control operation control. Rolling apparatus is disclosed (see Patent Document 1).

Japanese Patent Laid-Open No. 7-2450 (second page, FIG. 1)

Since the conventional elevator operating device is configured as described above, the occurrence of resonance at the natural resonance frequency of the building where the elevator is installed is predicted from the vibration caused by the earthquake, and the building resonates after a predetermined time due to the vibration. To prevent accidents where the car is trapped in the hoistway.
In addition to the elevator vibrating due to the large vibration of the building due to resonance, when the building shakes due to the long-period vibration of the earthquake, the ropes and cables in the hoistway contact each device due to resonance, There is a risk of damage. In general, the greater the earthquake, the larger the fault, and the longer it takes to start and stop the destruction. Therefore, it is said that the wave of a large earthquake contains many low frequency (long period) components and the characteristic frequency changes to a low frequency. The conventional elevator driving apparatus as described above has a problem in that there is a risk of continuing traveling due to long-period shaking of the building in which the sensor does not operate.

  The present invention was made to solve the above problems, and an object of the present invention is to obtain a driving device that efficiently extracts long-period vibrations from vibrations generated by earthquakes and uses them for control operation control. And

  An elevator operating apparatus according to the present invention is an elevator operating apparatus that performs a predetermined control operation by detecting an earthquake, and generates a pulse generator that generates a pulse signal proportional to the traveling distance of a car and a target speed pattern. Speed pattern command generating circuit, an actual speed calculating circuit for calculating an actual speed based on a pulse signal, a bandpass filter circuit for extracting a specific vibration component, and an abnormality determining circuit, and a speed pattern command generating circuit Based on the difference between the speed command value from the actual speed and the actual speed value from the actual speed calculation circuit, a long-period vibration component is extracted by the bandpass filter circuit, and the vibration component continues for a predetermined time with a predetermined magnitude or more. Sometimes, the abnormality determination circuit determines that this vibration component is due to the occurrence of an earthquake, and controls the operation of the elevator.

  In addition, a pulse generator that generates a pulse signal proportional to the traveling distance of the car, a band-pass filter circuit that extracts a specific vibration component, and an abnormality determination circuit are provided. When a long-period vibration component is extracted and the vibration component continues for a predetermined time with a predetermined magnitude or more, the abnormality determination circuit determines that this vibration component is due to the occurrence of an earthquake and controls the operation of the elevator. To do.

According to the present invention, the filter circuit generates a long-period vibration component from the speed command value from the speed pattern command generation circuit and the actual speed value obtained by the actual speed calculation circuit based on the pulse signal of the pulse generator. When it was determined that this long-period vibration component was caused by an earthquake, the elevator was controlled and controlled. It is possible to prevent the ropes and cables in the hoistway from contacting and damaging each device due to resonance due to the vibration of the cycle, and the safety of the elevator operation can be improved.
Also, based on the pulse signal of the pulse generator, a long-cycle vibration component is extracted by a filter circuit, and when it is determined that this long-cycle vibration component is caused by an earthquake, the elevator is controlled and controlled. Therefore, the same effect as described above can be obtained with a simple configuration.

Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram of an elevator operating apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a block diagram showing a calculation unit of the microcomputer of FIG. In FIG. 1, an elevator moves up and down in a slidable manner, with a rope 3 that connects a car 1 and a counterweight 2 wound around a sheave of a hoisting machine 4 connected to an electric motor (not shown). The rotation shaft of the hoisting machine 4 is provided with a pulse generator 5 made of, for example, a rotary encoder that generates a pulse proportional to the rotational speed of the hoisting machine 4, that is, proportional to the moving distance of the car 1. . A counting circuit 6 for measuring a pulse signal from the pulse generator 5 and an earthquake detector 7 for detecting an earthquake are provided, and these signals are taken into a microcomputer 8 to perform predetermined arithmetic processing. The processing result is transmitted to the power conversion circuit 9. The power conversion circuit 9 is configured to supply the hoisting machine 4 with a predetermined three-phase AC power based on the processing result based on a three-phase commercial power source.
The microcomputer 8 is mainly composed of a CPU, a storage unit such as a RAM and a ROM, and input / output ports.

  Next, the calculation unit 10 of the microcomputer 8 will be described with reference to FIG. A signal from the counting circuit 6 is input to a speed pattern command generation circuit 11 that generates a target speed pattern and an actual speed calculation circuit 12 that calculates an actual speed based on the stepped pulse signal output from the counting circuit 6. Is done. Based on the speed pattern command value from the speed pattern command generation circuit 11 and the actual speed signal from the actual speed calculation circuit 12, the speed control calculation circuit 13 calculates an optimal motor torque current command corresponding to the state. This calculation result is sent to the current control circuit 14, a current command signal is calculated based on the torque current command value, and is supplied to the power conversion circuit 9.

On the other hand, when an earthquake occurs, the signal from the earthquake detector 7 is taken into the contact receiver input processing circuit 15 and the operation control circuit 16 recognizes the occurrence of the earthquake based on the earthquake detection signal and returns to the nearest floor according to the traveling state. A stop command or emergency stop command is calculated and transmitted to the speed pattern command generation circuit 11 or the power conversion circuit 9.
Furthermore, the vibration frequency component generated at the time of the earthquake is extracted by the bandpass filter circuit 17 from the actual speed signal calculated by the actual speed calculation circuit 12 from the pulse generator 5 through the counting circuit 6 for speed detection. Based on this output signal, the abnormality determination circuit 18 performs abnormality determination processing. The abnormality determination circuit 18 determines that an earthquake has occurred when the output signal of the band-pass filter circuit 17 is greater than a predetermined value and continues for a predetermined time or more, and inputs the result to the operation control circuit 16, whereby the operation control circuit 16. Then, it is configured to issue an instruction to the power conversion circuit 9 so as to perform the seismic control operation.

Next, the seismic control operation processing function by the band-pass filter circuit 17 and the abnormality determination circuit 18 in the present invention will be described with reference to the flowchart of FIG. A graph is shown on the right side of the figure so that the processing contents at each step can be easily understood.
First, a speed command value generated by the speed pattern command generation circuit 11 is acquired and stored as a variable name Pat in the storage unit, and an actual speed value is acquired from the actual speed calculation circuit 12 and stored in a variable name Wr1 (step) 1. Hereinafter, abbreviated as S1). Next, the difference between the speed command value Pat and the actual speed value Wr1 is calculated and stored in the variable ΔErr1 (S2). Next, the band pass filter circuit 17 inputs ΔErr1 to perform a filter operation (S3). Here, for example, an actual digital arithmetic circuit has a circuit configuration in which a transfer function represented by the following formula 1 is Z-transformed.
1 / {(1 + T1 × S) (1 + T2 × S)} (1)
Here, T1 and T2 are time constants for extracting only long-period vibration components and are arbitrary values. S represents a Laplace function, and becomes an integral element at 1 / S. The extracted signal is a signal having a vibration component having a specific frequency component as shown in the graph on the right side of the flowchart.

Next, in the abnormality determination circuit 18, it is determined whether or not the signal ΔErr2 having the amplitude of the specific frequency component extracted in step 3, that is, the long-period vibration component is larger than a predetermined value and continues for a predetermined time or more. Judgment is made (S4). If YES, it is judged that a long-period vibration earthquake has occurred, the process proceeds to step 5, and the seismic control operation control signal is turned on and transmitted to the operation control circuit 16 (S5). ). In the case of NO, the process proceeds to step 6 where the seismic control operation control signal is turned OFF (S6), and thereafter this process is repeated from the beginning.
The reason why the timer process is provided in the above S4 is to extract only when an abnormal state continues for a predetermined time in order to prevent erroneous detection due to vibration when people get on and off, or erroneous detection due to vibration factors other than earthquakes. It is a thing.

  Based on the above processing, when the operation control circuit 16 receives the seismic control operation control signal from the abnormality determination circuit 18, the operation control circuit 16 recognizes the occurrence of the earthquake and issues a stop command to the nearest floor according to the traveling state. 11 and an emergency stop command is transmitted to the power conversion circuit 9.

As described above, according to the invention of the present embodiment, from the speed command value from the speed pattern command generation circuit and the actual speed value obtained by the actual speed calculation circuit based on the pulse signal of the pulse generator, When a long-period vibration component is extracted by a band-pass filter circuit and it is determined that this long-period vibration component is caused by an earthquake, control of the elevator is controlled. Long-period vibrations can be extracted efficiently and seismic control operation control can be performed according to the running state, so that long-period vibrations can cause the ropes and cables in the hoistway to contact and be damaged by each device due to resonance. Can be prevented, and the safety of elevator operation can be improved.
In addition, even when the earthquake sensor is out of order, it is possible to detect earthquakes by extracting long-period vibrations, improving the reliability of elevator operation.

Embodiment 2. FIG.
FIG. 4 is a block diagram showing a computing unit 19 of the microcomputer of the elevator operating apparatus according to Embodiment 2 of the present invention. A schematic configuration diagram of the entire operation apparatus is the same as that of FIG. The difference from the first embodiment is the input signal part to the band-pass filter circuit in the arithmetic part, so the difference will be mainly described.

4, the same parts as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. Unlike FIG. 2, in the present embodiment, the pulse signal from the counting circuit 6 is directly input to the band-pass filter circuit 17. The rest is the same as FIG.
With this configuration, the microcomputer 19 performs the following processing. In a normal state due to the acceleration / deceleration of the elevator, the vibration component is a known value because it depends on the equipment. Since the long-period component is known, the band-pass filter circuit is set so that the long-period component is removed and other long-period components are extracted. By doing so, the frequency component extracted by the bandpass filter is extracted from the long-period component due to the earthquake. Thereafter, as in the first embodiment, when the extracted vibration component is a predetermined magnitude or more and continues for a predetermined time or more, the abnormality determination circuit 18 determines that the vibration component is due to the occurrence of an earthquake and moves the elevator. Control operation control.

  As described above, according to the invention of the present embodiment, a long-period vibration component is generated by a bandpass filter circuit based on a pulse signal from a pulse generator that generates a pulse signal proportional to the traveling distance of the car. When the vibration component is extracted and continues for a predetermined time with a magnitude greater than or equal to the predetermined time, the abnormality determination circuit determines that the vibration component is due to the occurrence of an earthquake and controls the elevator operation. Compared to the first embodiment, it is possible to efficiently extract long-period vibrations among vibrations generated by an earthquake with a simple configuration, and the same effects as in the first embodiment can be obtained.

  The present invention can be widely applied to elevator operation devices that perform control operation when an earthquake occurs.

1 is a schematic configuration diagram of an elevator operating apparatus according to Embodiment 1 of the present invention. It is a block diagram which shows the calculating part of the microcomputer of FIG. FIG. 3 is a flowchart of the seismic control operation function in the first embodiment. It is a block diagram which shows the calculating part of the microcomputer of the operating device of the elevator by Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 5 Pulse generator 6 Count circuit 11 Speed pattern command generation circuit 12 Actual speed calculation circuit 17 Band pass filter circuit 18 Abnormality determination circuit.

Claims (2)

  In an elevator driving device that detects an earthquake and performs predetermined control operation, a pulse generator that generates a pulse signal proportional to the travel distance of the car, a speed pattern command generation circuit that generates a target speed pattern, and the pulse An actual speed calculation circuit that calculates an actual speed based on the signal, a bandpass filter circuit that extracts a specific vibration component, and an abnormality determination circuit, and the speed command value from the speed pattern command generation circuit and the actual speed When a long-period vibration component is extracted by the band-pass filter circuit based on the difference between the actual speed values from the speed calculation circuit and the vibration component continues for a predetermined time with a predetermined magnitude or more, the abnormality An elevator operating device characterized in that a control circuit determines that the vibration component is caused by an earthquake and controls the elevator.   In an elevator driving device that senses an earthquake and performs predetermined control operation, a pulse generator that generates a pulse signal proportional to the traveling distance of the car, a bandpass filter circuit that extracts a specific vibration component, and an abnormality determination circuit A long-period vibration component is extracted by the band-pass filter circuit based on the pulse signal, and when the vibration component continues for a predetermined time with a predetermined magnitude or more, the abnormality determination circuit An elevator operating device characterized in that it is determined that the vibration component is caused by an earthquake and the elevator is controlled and controlled.

Images