JPH072450A - Emergency operating device for elevator - Google Patents

Abstract

PURPOSE:To prevent a confined accident in a cage by computing frequency distribution of acceleration of an earthquake vibration detected by an acceleration sensor, comparing a frequency of the maximum distribution with the resonance frequency in a building, and performing an emergency operation of an elevator when both the frequencies agree in a deviation value. CONSTITUTION:In the case of occurring an earthquake, an acceleration component of earthquake vibration is detected corresponding to the time by acceleration sensors 2a 2b, and a detecting result of these sensors is input to a CPU3. Here in the case of deciding an acceleration signal to exceed a reference value, the first alarm signal is output from a terminal 3a. The acceleration signal is input to a frequency analyzer 4, here to calculate a distribution characteristic of detection frequency in each frequency, and also detecting a peak frequency corresponding to a maximum frequency compared with a data of natural resonance frequency of a building in a comparator 6. In the case that a deviation of the frequencies agrees in a preset deviation value, the second alarm signal is output, and by the alarm signal via an OR circuit, a cage is guided to the nearest floor by an emergency operation control device 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control operation apparatus for shifting an elevator to control operation when an occurrence of an earthquake is detected.

[0002]

2. Description of the Related Art In a conventional elevator control operation device,
In many cases, the seismograph that detects the acceleration of vibration is placed in the machine room of the elevator installed on the top floor of the building where the elevator is installed, or in the pit provided on the bottom of the lowest floor of the elevator hoistway, When the acceleration detected by the seismograph exceeds a predetermined value, the control operation control means is operated to control the elevator. Thus, even if the elevator is controlled by detecting the acceleration of vibration when an earthquake occurs, it may not always correspond to the amount of shake of the building itself in which the elevator is installed. Even if the acceleration of the generated vibration is less than the specified value, the shake of the building becomes large, and the normal operation of the elevator may be in a dangerous state.

Therefore, as a control operation device which operates by detecting a physical quantity other than acceleration when an earthquake occurs, the actual operation is carried out as follows.
Japanese Unexamined Patent Publication No. 22106 discloses an elevator control operation device that detects a displacement amount caused by an earthquake in a building in which an elevator is installed, and performs a control operation when the displacement amount exceeds a predetermined value.

[0004]

According to the elevator control operation device according to the present disclosure, at the time of occurrence of an earthquake, the displacement amount of vibration of the building itself in which the elevator is installed is detected, and the elevator is appropriately moved. It is possible to shift to control operation. However, even with the disclosed elevator control operation device, it is not possible to perform control operation that accurately grasps the temporal change in the vibration of the building in which the elevator is installed in response to the occurrence of an earthquake. That is, in a building where an elevator is installed, there is a natural resonance frequency that is determined by factors such as the structure of the building, the condition of the ground where the building is built, and the building condition around the building. When vibration of a frequency near the frequency occurs, even if the energy of the initial vibration is small, a resonance state occurs after a predetermined time and the vibration shifts to the vibration of the natural resonance frequency. On the other hand, in the elevator control operation device according to the disclosure, since the amount of displacement of the building at the original time is detected, a relatively small vibration occurs at a frequency near the natural resonance frequency of the building when an earthquake occurs. In this case, the normal operation is performed as it is, and the weak vibration of the building may be transferred to the vibration at the natural resonance frequency during the operation, which may cause an accident in which the car is trapped in the hoistway.

The present invention has been made in view of the current state of elevator control operation as described above, and its purpose is to generate resonance at a natural resonance frequency of a building in which an elevator is installed due to vibration caused by an earthquake. It is to provide a control operation device for an elevator that predicts and performs control operation.

[0006]

In order to achieve the above object, the present invention relates to an elevator control operation device for detecting an earthquake and driving the control operation drive means to cause the elevator to perform control operation. When an earthquake occurs, an acceleration sensor that detects acceleration of vibration of a building in which the elevator is installed, a storage unit that stores data of a resonance frequency measured in advance at a resonance measurement point in the building, and the acceleration sensor. When the detected acceleration of vibration exceeds a preset reference value, a first alarm means for outputting a first alarm signal, and a frequency analysis means for calculating a frequency distribution characteristic of the acceleration of vibration detected by the acceleration sensor. And comparing the maximum distribution frequency calculated by the frequency analysis means with the resonance frequency, and the maximum distribution frequency and the resonance frequency are within a preset deviation value. When the two coincide, a second alarm means for outputting a second alarm signal and a control operation control means for driving the control operation drive means by the first alarm signal or the second alarm signal are provided. There is.

[0007]

According to this structure, when an earthquake occurs, the acceleration sensor detects the vibration acceleration of the building in which the elevator is installed, and when the acceleration of the vibration detected by the acceleration sensor exceeds a preset value, The first alarm signal is output from the first alarm means.

The frequency distribution characteristic of the vibration acceleration detected by the acceleration sensor is calculated by the frequency analysis means, and the maximum distribution frequency calculated by the frequency analysis means and the measurement points in the building where the elevator is installed are measured. The resonance frequency data measured in advance and stored in the storage means is compared, and when the maximum distribution frequency and the resonance frequency match within a preset deviation value, the second alarm means outputs a second value.
Warning signal is output.

Then, the control operation control means is activated by the first alarm signal or the second alarm signal, the control operation drive means is driven by the control operation control means, and the elevator is controlled.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a block diagram showing the configuration of the embodiment, FIG. 2 is a characteristic diagram of the seismic waveform detected by the acceleration sensor of the embodiment, and FIG. 3 is a frequency distribution characteristic of the seismic waveform calculated by the frequency analyzer of the embodiment. It is a figure.

In the embodiment, an acceleration sensor 2a that detects vibration in the X-axis direction of the Cartesian coordinate system on the floor of the building where the elevator is installed and outputs an acceleration signal corresponding to time, and Y
An acceleration sensor 2b that detects axial vibration and outputs an acceleration signal corresponding to time is provided, and the output terminals of these acceleration sensors 2a and 2b are connected to a CPU 3 that controls the overall operation. . The CPU 3 is provided with a first alarm means for detecting that the acceleration signals output from the acceleration sensor 2a and the acceleration sensor 2b exceed a preset reference value and outputting a first alarm signal. ,
This first alarm signal is output from the output terminal 3a, and the output terminal 3a is connected to one input terminal of the OR circuit 5. Further, the CPU 3 is provided with an output terminal 3b for an acceleration signal output by the acceleration sensors 2a, 2b, and the output terminal 3b is a frequency analyzer 4 as a frequency analysis means for calculating a frequency distribution characteristic of the acceleration signal.
The output terminal of the frequency analyzer 4 is connected to one input terminal of the comparator 6, and the other input terminal of the comparator 6 is measured in advance in the building in which the elevator is installed. The storage unit 7 storing the data of the natural resonance frequency is connected as a storage unit. The output terminal of the comparator 6 is connected to the other input terminal of the OR circuit 5 as the control operation control means, and the output terminal of the OR circuit 5 issues a control operation command to the elevator. Is connected to the management operation control device 8.

The operation of the embodiment having such a configuration will be described.

When an earthquake occurs, the acceleration sensors 2a, 2
b detects the acceleration component of seismic vibration corresponding to time,
The obtained acceleration signal as shown in FIG. 2 is input to the CPU 3. The CPU 3 outputs the acceleration signals detected by the acceleration sensors 2a and 2b from the output terminal 3b, and determines whether the acceleration signal exceeds a preset reference value. If it is determined that the acceleration signal exceeds the reference value, the CPU 3 outputs from the terminal 3a. First
Is output, and the first alarm signal is input to the OR circuit 5. On the other hand, the acceleration signal output from the terminal 3b is input to the frequency analyzer 4 and then to the frequency analyzer 4, and the frequency analyzer 4 outputs the detection frequency of each frequency from the acceleration signal as shown in FIG. Distribution characteristics are calculated. Then, the peak frequency fp corresponding to the maximum frequency
Is detected, and the peak frequency signal corresponding to the peak frequency fp is input to one input terminal of the comparator 6. The comparator 6 compares the peak frequency signal with the data of the natural resonance frequency of the building in which the elevator is installed, which is stored in the storage unit 7, and the peak frequency signal and the data of the natural resonance frequency are set in advance. If they match within the specified deviation value,
A second alarm signal is output from the comparator 6, and this second alarm signal is input to the OR circuit 5.

A drive signal is output from the OR circuit 5 by the input of at least one of the first alarm signal and the second alarm signal, and this drive signal is input to the control operation control device 8 and the control operation control device. A command for elevator control operation was issued from 8, the elevator transitioned to control operation,
The car is guided to the nearest floor, and the door is opened at the landing to bring the car into a suspended state.

As described above, according to the embodiment, not only when the acceleration of the seismic vibration detected by the acceleration sensors 2a and 2b exceeds the reference value, but also the peak corresponding to the maximum frequency based on the frequency distribution characteristic of the seismic vibration. Even when the frequency fp is within the deviation value of the natural resonance frequency of the building in which the elevator is installed, the elevator control operation is performed. Therefore, even if the acceleration of seismic vibration is below the reference value, vibration occurs at a frequency near the natural resonance frequency of the building where the elevator is installed, and the vibration causes the building to resonate after a predetermined time, Accidents where the car is trapped in the hoistway are completely prevented.

[0016]

As described above, according to the present invention, the frequency distribution of the acceleration of seismic vibration detected by the acceleration sensor is calculated, and the frequency of the maximum distribution is measured in advance in the building where the elevator is installed. The resonance frequency of the building is compared, and if the two agree within a preset deviation value, the elevator control operation is performed immediately.Therefore, the transition to the resonance of the vibration near the resonance frequency of the building is detected and controlled. It is possible to drive, and it is possible to completely prevent the accident of trapping the car in the hoistway.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a characteristic diagram of an earthquake waveform detected by the acceleration sensor of the embodiment.

FIG. 3 is a frequency characteristic diagram of an earthquake waveform calculated by the frequency analyzer of the embodiment.

[Explanation of reference numerals] 1 control operation device 2a, 2b acceleration sensor 3 CPU 4 frequency analyzer 5 OR circuit 6 comparator 7 storage unit 8 control operation control unit

Claims (1)

[Claims] 1. An elevator control operation device for detecting an occurrence of an earthquake and driving a control operation drive unit to cause an elevator to perform a control operation, wherein the acceleration of vibration of a building in which the elevator is installed is controlled when an earthquake occurs. An acceleration sensor for detecting, 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 vibration detected by the acceleration sensor exceeds a preset reference value, First to output a first alarm signal
Warning means, frequency analysis means for calculating the frequency distribution characteristic of the acceleration of vibration detected by the acceleration sensor, the maximum distribution frequency calculated by the frequency analysis means and the resonance frequency, and the maximum distribution If the frequency and the resonance frequency match within a preset deviation value, the second
Of the elevator, and a control operation control means for driving the control operation drive means by the first alarm signal or the second alarm signal. Control operation device.