JPH0573672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a control operation device for elevators, various railways, power plants, nuclear power plants, various Prunto facilities, etc., and particularly relates to a control operation device during an earthquake.

[Background of the invention]

If elevators, railways, power plants, various plant equipment, etc. are subjected to strong vibrations such as those caused by earthquakes while they are in operation, abnormalities may occur in the equipment and equipment, leading to a dangerous situation.

Therefore, when the effects of vibrations such as earthquakes appear on the building or site where they are installed, or on a specific location such as themselves, such equipment and equipment should be checked for operational status. In order to maintain an operating state that does not lead to a dangerous situation even when an abnormality occurs due to vibrations, devices are being installed that perform preset controlled operation when vibrations are detected.

Conventionally, such a control operation device detects vibration acceleration and issues a control signal when the vibration acceleration exceeds a predetermined value.

For example, in elevators,
As described in Publication No. 9375, there are two acceleration types: a first acceleration type detector with a low operation level, e.g., 0.02G, and a second acceleration type detector with a high operation level, e.g., 0.2 to 0.4G. Using a detector, the first
When the acceleration detector is activated, all cars are stopped, and if the second acceleration detector is not activated, the elevator operation is automatically resumed after a predetermined period of time after the acceleration falls below a predetermined value. The method is known. According to this method, the first accelerometer detects the occurrence of an earthquake early and stops all elevators, which improves safety in the event of an earthquake and also prevents damage to elevator equipment. The second possibility of
If the acceleration detector is not operating, the elevator will automatically resume operation after a predetermined period of time after the acceleration drops below a predetermined value, reducing the chances of maintenance suspensions and improving service. be able to.

However, damage to facilities and equipment caused by an earthquake can be estimated based on the seismic intensity announced by the Japan Meteorological Agency, and it is said that this seismic intensity can be determined if the acceleration is determined, and the control operation of elevators etc. is also based on this. I have followed the standards. However, recent research has called into question the relationship between acceleration and seismic intensity, and it has become clear that control based on acceleration, which is based on the relationship between acceleration and seismic intensity, does not suit the actual situation.

The detected amount for control operation according to the actual situation is:
"Introduction of wave energy type earthquake sensing system for earthquake control operation" in "Elevator Technology Lecture Collection"
(p53-p68, Onoda et al.) reveals that there is a product of earthquake vibration velocity and displacement. As a means of finding the product of the velocity and displacement of this vibration, the output of the acceleration detector is integrated to find the velocity and displacement.
A method has been proposed to obtain the product of vibration velocity and displacement by multiplying these values, but the specific structure thereof has not been sufficiently studied.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a control operation device that is inexpensive and can issue control signals suitable for actual conditions even in response to various vibrations caused by earthquakes.

[Summary of the invention]

A feature of the present invention is that the product of velocity and displacement is used in an air traffic control system that calculates the product of vibration velocity and displacement when receiving vibrations such as an earthquake, and issues a control signal based on this product of velocity and displacement. The control signal is emitted not only when the speed and displacement reach a predetermined value, but also when the speed and displacement each reach a predetermined value.

In order to use the product of vibration velocity and displacement as a control signal, it is necessary to accurately determine both velocity and displacement. For example, if one of the outputs of velocity and displacement is small, and the other is saturated beyond the calculation range, the product of velocity and displacement will be smaller than it actually is, and the control signal will not be issued when it should be. This situation may occur. To prevent this, it is necessary to reduce the amplification factor of each detector so that saturation does not occur, and to ensure the necessary accuracy, both displacement and velocity must be determined with high accuracy. For simplicity, if the velocity V of earthquake vibration is expressed as V=a sin ωt, then the displacement D obtained by integration becomes D=a/ωcos ωt. Here, a represents the absolute value of the amplitude, ω represents the angular frequency, and t represents the time. Since ω is 2πf and f is the frequency, even if the range of frequency components included in earthquake vibration is from 0.1Hz to 20Hz, even if the velocity is the same amplitude at 0.1Hz and 20Hz, the displacement becomes 200 times different.

From the above, it can be seen that in order to issue a control signal based on the product of velocity and displacement, a detector is required that has a high amplification factor for both velocity and displacement and does not saturate. Since it is difficult to realize this at a low cost, the present invention considers that controlled operation is necessary when the speed or displacement exceeds a predetermined value, and also issues a control signal when the speed or change exceeds a predetermined value. In this way, even a relatively inexpensive speed and displacement detector can generate a control signal that is appropriate to the actual situation.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a block diagram showing an embodiment in which the present invention is used for earthquake control operation of elevators. The acceleration of earthquake vibration detected by the acceleration detector 1 attached to the elevator equipment 11 is calculated by an integrator 2 for calculating velocity and an acceleration comparator 5.
If the acceleration exceeds the reference value, the acceleration comparator 5 sends a control signal to the elevator control device 10. On the other hand, the velocity of the earthquake vibration determined by the integrator 2 that calculates velocity is sent to a multiplier 4, an integrator that calculates displacement, and a velocity comparator 6. If the elevator has exceeded the limit, a control signal is sent to the elevator control device 10. Furthermore, the displacement of the earthquake vibration obtained by the integrator 3 that calculates the displacement is calculated by the multiplier 4 and the displacement comparator 7.
The displacement comparator 7 sends a control signal to the elevator control device 10 if the displacement exceeds the reference value. Multiplier 4 calculates the product of the earthquake vibration velocity and displacement calculated by integrators 2 and 3,
The speed and displacement comparator 9 sends a control signal to the elevator control device 10 if the product of speed and displacement exceeds a reference value. The elevator control device 10 includes 5, 6, 7,
9. Control operation begins based on control signals issued from each comparator.

Next, a specific embodiment of the present invention that achieves these will be described in detail.

FIG. 2 is a configuration diagram of the present invention when an analog circuit is used. Here, we will describe a method for detecting earthquake vibrations coming from any direction in the horizontal plane, but if you arrange three acceleration detectors at right angles to each other and prepare three circuits up to the adder, you can It is possible to detect earthquake vibrations coming from all directions. In Fig. 2, acceleration detectors 1X and 1Y are arranged perpendicularly to each other.
The acceleration in each of the X and Y directions detected at
The signal is sent to integrators 2X, 2Y for calculating velocity and comparators 5X, 5Y for acceleration. Acceleration comparators 5X and 5Y compare the acceleration in the X and Y directions with respective acceleration reference values, and issue a control signal if the acceleration exceeds the reference value. On the other hand, the integrators 2X, 2Y calculate the velocity in each direction, and send it to the integrators 3X, 3Y that calculate displacement, the velocity comparators 6X, 6Y, and the multipliers 4X, 4Y. Speed comparator 6X, 6Y
compares the speed in the X and Y directions with respective speed reference values, and issues a control signal if the speed exceeds the reference value. Further, the integrators 3X, 3Y calculate the displacement in each direction, and send it to the multipliers 4X, 4Y and the displacement comparators 7X, 7Y. displacement comparator 7X,
7Y compares displacements in the X and Y directions as reference values for each displacement, and issues a control signal if the displacement exceeds the reference value. In the multipliers 4X, 4Y, the integrators 2X,
The product of the velocity and displacement in each of the X and Y directions determined by 2Y, 3X, and 3Y is determined and sent to the adder 8.
Adder 8 calculates the sum of the products of velocity and displacement in each direction determined by multipliers 3X and 3Y, and calculates the product of velocity and displacement in any direction in the horizontal plane. The product of velocity and displacement in any direction within this horizontal plane is sent to the velocity and displacement product comparator 9, and the velocity and displacement product comparator 9 compares the reference value of the velocity and displacement product with the velocity. The product of displacement is compared, and if it exceeds the standard value, a control signal is issued.

According to this method, when the excitation source is in only one direction, such as during an earthquake, the product of velocity and displacement in all directions in the horizontal plane can be calculated without using a circuit that calculates the root mean square value. If a control signal can be issued by using the system, and if another set of sections from the acceleration detector to the multiplier is prepared, it is easy to change the direction to find the product of velocity and displacement in all directions.

Figure 3 is a configuration diagram in which the root mean square value of velocity and displacement in each of the X and Y directions is determined, the absolute value of velocity and displacement in any direction in the horizontal plane is determined, and then the product of velocity and displacement is determined. It is. Regarding this, we will also discuss a method for detecting earthquake vibrations coming from any direction in the horizontal plane, but we will prepare another set of acceleration detectors and integrators, and use a circuit to calculate the root mean square value in three directions. By doing so, it is possible to detect earthquake vibrations coming from any direction. Third
In the figure, X, Y detected by acceleration detectors X7 and Y7 arranged perpendicular to each other.
The acceleration in each direction is sent to integrators 2X, 2Y that calculate velocity and acceleration comparators 5X, 5Y. The acceleration comparators 5X and 5Y compare the acceleration in the X and Y directions with respective acceleration reference values,
If the standard value is exceeded, a control signal will be issued. on the other hand,
The integrators 2X and 2Y calculate the velocity in each direction, and send the velocity to the integrators 3X and 3Y that calculate displacement and to the root mean square velocity circuit 10. The mean square velocity circuit 10 calculates the mean square value of the velocity in both the X and Y directions, and the results are sent to the multiplier 4 and the velocity comparator 6. The speed comparator 6 compares the output of the speed root mean square circuit 10 with a speed reference value,
If the standard value is exceeded, a control signal will be issued. Also,
The integrators 3X and 3Y that calculate the displacement calculate the displacement in each direction and send it to the root mean square displacement circuit 11. In the displacement root mean square circuit 11, X, Y
The root mean square value of the displacement in both directions is calculated and the result is sent to a multiplier 4 and a displacement comparator 7. The displacement comparator 7 compares the output of the displacement root mean square circuit 11 with a displacement reference value, and issues a control signal if the displacement exceeds the reference value. In the multiplier 4, the mean square circuit 1
By multiplying the outputs of 0 and 11, the absolute value of the product of velocity and displacement in any direction is determined and sent to the comparator 9 for the product of velocity and displacement. A comparator 9 for the product of velocity and displacement compares the reference value of velocity and displacement with the output of the multiplier 4, and issues a control signal if the output of the multiplier 4 exceeds the reference value.

According to this method, a circuit that takes the root mean square value is required, but even if the source of vibration changes from time to time, such as vibration caused by wind, control based on the product of velocity and displacement can be performed accurately. be able to.

FIG. 4 is a block diagram when the present invention is constructed in a digital manner. In this case as well, a method for detecting vibrations in any direction in the horizontal plane will be described, but vibrations in all directions can also be detected by using another acceleration detector and changing the program. In FIG. 4, acceleration detector X7,
The acceleration of the earthquake vibration detected by X2 is sent to the multiplexer 41, and then to the A/D converter 4.
Sent to 2. The A/D converter 42 converts the signal into a digital signal, which is a micro preset.
Sent to CPU43. In the CPU 43, velocity, displacement, and the product of velocity and displacement are calculated by the program memory 46, and compared with each reference value stored in the reference value memory 48. If each value exceeds each standard value, it is an input/output device.
A control signal is issued from PIA.

According to this method, by changing the program,
It can be changed to either a method that takes the square mean or a method that does not take the mean square.

FIG. 5 is a flowchart when the root mean square is not taken. First, the acceleration value is read from the acceleration detector (501), the read acceleration is compared with an acceleration reference value (502), and if it exceeds the reference value, an acceleration control signal is issued (503). If the speed has not been exceeded, calculate the speed (504), compare the obtained speed with the speed reference value (505), if the speed has been exceeded, issue a speed control signal (506), and if the speed has not been exceeded, calculate the displacement (507). ). Compare the obtained displacement with the displacement reference value (508), and if it exceeds it, issue a displacement control signal (509), and if it does not, then the speed determined in 504 and the displacement control signal are issued (509).
Calculate the product of the displacements obtained in step 507 (510). Compare the obtained product of velocity and displacement with the standard value of the product of velocity and displacement (511), and if it exceeds the standard value, issue a control signal of the product of velocity and displacement (512), and if it does not exceed it, determine whether the earthquake has ended. (513), and if it has not finished, return to 501.

FIG. 6 is a flowchart for calculating the square mean. Before comparing acceleration, velocity, displacement, and the product of velocity and displacement with each reference value, take the root mean of each at 601, 602, and 603, and when comparing with each reference value at 502, 503, and 508, The process is the same as the case where the root mean squares are not calculated, except that the root mean squares calculated in steps 601, 602, and 603 are compared with each reference value.

〔Effect of the invention〕

According to the present invention, it is possible to issue control operation commands based on the product of velocity and displacement, which has a close relationship between earthquakes and damage, and to simplify and economize the device without degrading the detection information. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
Figure 2 is a block diagram when an analog circuit is used, Figure 3 is a block diagram when calculating the root mean square, Figure 4 is a block diagram when using the digital method, and Figure 5 is a block diagram when the root mean square is not calculated. Flowchart FIG. 6 is a flowchart for calculating the root mean square. 1... Acceleration detector, 2... Integrator that calculates velocity, 3... Integrator that calculates displacement, 4... Multiplier, 5
... Acceleration comparator, 6... Speed comparator, 7... Displacement comparator, 9... Speed x displacement comparator, 10... Elevator control device, 11... Elevator equipment.

Claims (1)

[Scope of Claims] 1. Detecting vibrations in a specific place and for equipment or equipment that may be affected by the vibrations,
A control operation device for instructing a predetermined control operation, comprising means for detecting the speed and displacement of vibration appearing at the specific location, means for determining the product of the speed and displacement of the vibration, and means for determining the product of the speed and displacement of the vibration. A control operation device comprising a first means for instructing control when the speed or displacement reaches a predetermined value, and a second means for instructing control when the speed or displacement reaches a predetermined value. 2. The control operation device according to claim 1, wherein the speed or displacement of the vibration is detected by integrating the acceleration of the vibration. 3. The control operation device according to claim 1, wherein the vibration displacement is detected by integrating speed. 4. The control operation device according to claim 1, wherein the equipment or equipment that is likely to be affected by vibration is elevator equipment or elevator equipment.