JPH05341052A - Operation control device - Google Patents

Abstract

PURPOSE:To stop the operation certainly without occurrence of over-motions by judging if it is any earthquake when a tremor over the first level exists, and actuating operation stop when it is earthquake and a tremor exceeds the second level. CONSTITUTION:The electrostatic capacitance of a capacitance sensor 10 of a tremor sensing part 1 varies with the acceleration generated by any tremor, and a signal of frequency foot is emitted according to the change in the capacitance. A microcomputer 2 calculates the tremor acceleration from the output of the sensing part 1 and therefrom computes the tremor energy per period as specified. When the tremor energy exceeds the first level set previously, judgement is made by fuzzy presumption whether the applicable tremor is due to earthquake. If earthquake, elevator in running is stopped at the nearest floor. Then the level output is reset, and the operation is restituted to normal mode. If judged as earthquake and when the tremor energy is over the second lever which lies higher, the elevator is stopped at the nearest floor and the operation is put in standstill.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device attached to, for example, an elevator, a vehicle, or the like to control them in the event of an earthquake.

[0002]

2. Description of the Related Art Generally, elevators, railway vehicles, and the like are equipped with a control device for detecting driving vibrations and stopping driving or traveling when strong vibrations are applied due to an earthquake during driving. .

FIG. 12 is a control flowchart of the elevator control device.

First, it is judged whether or not vibration occurs and the "extra low" sensor operates, that is, whether or not the acceleration of vibration is equal to or higher than a preset first level (step n1). ), When the "extremely low" sensor is not working,
Continue operation (step n2), and when it operates,
It is determined whether or not the "low" sensor is operated, that is, whether or not the acceleration of vibration is equal to or higher than the second level which is higher than the first level (step n3).

In step n3, when the "low" sensor is not operating, the elevator judges whether or not it is traveling (step n4), and when it is traveling, it stops at the nearest floor ( Step n5), the door is opened (step n6), the door is closed after a predetermined time has elapsed (step n7), it is determined whether the door open button is pushed in the car (step n8), and when it is not pushed, The "specific" sensor is manually or automatically reset (step n9) to return to normal operation (step n10).

At step n3, when the "low" sensor operates, the elevator judges whether or not it is traveling (step n11), and when it is traveling, it stops at the nearest floor (step n12). ), Open the door (step n13), and close the door after a predetermined time has passed (step n13).
14), it is determined whether or not the door open button is pushed in the car (step n15), and when not pushed, the operation is stopped (step n16).

[0007]

As described above, in the prior art,
By using two sensors, "specific" and "low", when only the "specific" sensor operates, the normal operation is reset by resetting, and both the "specific" and "low" sensors operate. When I do, I try to stop the operation.

However, in such a conventional control device, the detection level of the "specific" sensor is set to a low level for safety, and it may operate excessively due to vibration of a nearby construction site. There is a drawback.

The present invention has been made in view of the above points, and provides a control device capable of reliably stopping the operation without excessive operation and when the operation should be stopped. The purpose is to

[0010]

In order to achieve the above object, the present invention is configured as follows.

That is, the present invention is a control device for detecting an earthquake and performing a required control operation, wherein a vibration detection part for detecting vibration and a vibration acceleration or vibration energy based on a detection output of the vibration detection part A discriminating unit that discriminates whether or not there is an earthquake when it is equal to or higher than a preset first level, and the discriminating unit discriminates that there is an earthquake, and the vibration acceleration or vibration energy is When it is less than the second level higher than the level of 1, the first control operation is performed, the determination unit determines that the earthquake, and
And a control unit that performs a second control operation when the vibration acceleration or the vibration energy is equal to or higher than the second level.

[0012]

According to the above construction, when there is a vibration of the first level or higher, it is judged whether or not there is an earthquake, and when there is an earthquake, the first control operation, for example, the "special feature" of the conventional example is performed. Low "
Control operation in the case of, and also during an earthquake, and
When the vibration is equal to or higher than the second level, the second control operation, for example, the control operation such as the suspension of the elevator operation can be performed as in the case of "low" in the conventional example.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an elevator control device according to an embodiment of the present invention.

The control device of this embodiment detects a vibration and outputs a corresponding frequency signal, and a vibration detection unit 1, and based on the output of the vibration detection unit 1, a seismic discrimination and a control operation as described later. A microcomputer 2 for performing the above, a setting unit 3 for externally setting a detection level and the like, and an output unit 4 for giving a control output to an elevator (not shown).

The vibration detector 1 of this embodiment comprises a CR oscillation circuit 5 and a frequency divider 6 for dividing the output of the CR oscillation circuit 5.
It has and.

The CR oscillation circuit 5 includes a capacitance sensor 10 which will be described later.
A capacitance changing portion C composed of a resistor R, a stabilizing resistor Rf
And the inverters 7 to 9, and changes the capacitance of the capacitance sensor 10 with the frequency f _{0 according} to the relationship shown by the following equation.
It is converted into (Hz) and output.

F _out = 1 / (2.2CR) As shown in the exploded perspective view of FIG. 2 and the sectional view of FIG. 3, the capacitance sensor 10 has a capacitance that changes in response to vibration.
A printed wiring board 13 having a fixed electrode 12 formed therein and a movable electrode 14 having a vibration spring are housed in a case 11 via a spacer 15, and a cover 16 is attached. In this capacitance sensor 10,
The movable electrode 14 swings due to the acceleration generated by the vibration, and the electrostatic capacitance C (Farad) between the movable electrode 14 and the fixed electrode 12 is given by the following equation.

C = ε ₀ · (S / d) where S is the area where the electrodes face each other d is the distance between the electrodes ε _{0 is the} dielectric constant, that is, the movable electrode 14 oscillates to generate between the electrodes. The capacity of the CR oscillation circuit 5 changes.
Outputs a signal having a frequency according to the change in capacitance.

The microcomputer 2 includes a frequency measurement timer 17, a reference cycle storage section 18 in which a reference cycle (cycle at rest) of the CR oscillation circuit output is stored in advance, and a vibration acceleration from the output of the vibration detection section 1. An arithmetic unit 19 that performs arithmetic operations and the like, and a control unit 20 that determines whether or not there is an earthquake by fuzzy reasoning and performs control operation as described later are provided.

In this microcomputer 2, first,
The vibration acceleration is calculated from the output of the vibration detection unit 1 as follows.

That is, the output of the vibration detector 1 is as shown in FIG.
When the electrode approaches the basic period T at rest (vibration to the + side) shown in (A), it becomes T ⁺ as shown in FIG. 4B, and when the electrode separates (-). Vibration to the side)
Becomes T ⁻ as shown in FIG. 4C, and the vibration acceleration is calculated by the following equation.

+ Side vibration acceleration (ΔT ⁺ ) = T ⁺ −T − side vibration acceleration (ΔT ⁻ ) = T ⁻ −T This calculation is performed by the frequency measurement timer 17, the calculation unit 19, the reference period storage unit 18, and the like. By sampling this acceleration at regular intervals, a vibration acceleration waveform can be obtained as shown in FIG.

In this embodiment, further, as shown in FIG. 6, moving average processing of sampled vibration acceleration data at four points is performed, and as shown in FIG. Has been cut. In FIG. 6, Xi is input, Yi is response output, T is time,
M = 4.

The microcomputer 2 of this embodiment is
From the vibration acceleration thus obtained, the vibration energy per predetermined cycle, for example, 1/2 cycle, is calculated as described below, and when this vibration energy becomes equal to or higher than the preset first level, vibration It is determined by fuzzy reasoning whether or not is due to an earthquake, and when it is an earthquake, the control operation corresponding to the first level, the control operation in the case of the "extra low" in the past, and the earthquake have occurred. When it is determined that the vibration energy is equal to or higher than the second level which is higher than the first level, the control operation corresponding to the second level and the conventional control operation in the case of "low" are performed.

Here, the procedure for calculating the vibration energy from the vibration acceleration will be described.

For example, from the acceleration waveform shown in FIG. 8, the vibration energy per predetermined cycle, for example, 1/2 cycle, can be obtained as follows.

The velocity v can be calculated by integrating the acceleration a over the period of 1/2 cycle, that is, by obtaining the area of the acceleration waveform of 1/2 cycle. The velocity v and the vibration energy E have a relation of E = (1/2) · mv ² , that is, the vibration energy has a proportional relation with the square of the velocity.

Therefore, a conversion table of speed and vibration energy, for example, Table 1 below is prepared in advance, and the vibration energy per 1/2 cycle is calculated from the acceleration and the cycle.

[0030]

[Table 1]

In this embodiment, when the vibration energy per 1/2 cycle calculated as described above exceeds the preset first energy level,
Whether the vibration is due to an earthquake is determined as follows.

That is, the following three types of feature quantities are extracted from the vibration acceleration waveform to perform fuzzy inference.

The feature amount 1 is a predetermined period (for example, 1 second)
Is the maximum vibration acceleration (GAL) in the
Is an average value (T) of the vibration cycle in the predetermined period, and the feature amount 3 is, for example, ½ in the predetermined period.
It is the maximum value (E) of vibration energy per cycle.

The discrimination of earthquakes based on these characteristic amounts is performed by referring to FIG.
And the membership function shown in FIG. 10 and the following fuzzy rules.

That is, FIG. 9A shows that the feature quantity 1 (GA
L) shows the membership function of "SLM", "MD"
It has three labels, "L" and "BIG", as shown in FIG.
(B) shows the membership function of the feature amount 2 (T),
It has three labels of "SML", "MDL", and "BIG", and FIG. 9C shows the membership function of the feature amount 3 (E), which is "SML", "MDL", " BIG "
It has three labels.

FIG. 10 shows the membership function of the discrimination output, which is the consequent part, and has two labels, "UEQ (non-earthquake-like)" and "EQ (earthquake-like)".

The fuzzy rules are as follows.

Rule 1. IF GAL = BIG and T = SML THEN UEQ Rule 2. IF E = MDL and T = SML THEN UEQ Rule 3. IF GAL = SML and E = SML THEN UEQ Rule 4. IF GAL = MDL and E = BIG and T = MDL THEN EQ Rule 5. IF GAL = BIG and E = BIG and T = MDL THEN EQ Rule 6. IF GAL = BIG and E = MDL and T = BIG THEN EQ The definite operation of this fuzzy inference is performed by the maximum height method.

In this embodiment, when it is determined by fuzzy reasoning that an earthquake occurs, the control operation corresponding to the first level and the control operation in the case of the conventional "extra low" are performed.
Further, when it is determined that an earthquake occurs and the vibration energy is equal to or higher than the second level, which is higher than the first level, the control operation corresponding to the second level, the conventional "low" control It is an operation.

FIG. 11 is a flowchart of such control processing.

First, it is judged whether or not a vibration is generated and the vibration energy is a vibration equal to or higher than a preset first level (step n1). When the vibration energy is below the first level, the operation is continued. (Step n2) If it is equal to or higher than the first level, fuzzy inference is performed based on the three types of feature quantities (Step n3) as described above, and it is determined whether or not there is an earthquake (Step n4). If it is not an earthquake, the process returns to step n1.

When it is an earthquake, it is judged whether or not the vibration energy is vibration of a second level or higher which is higher than the first level (step n5). The same control operation as in "Extraordinary low" is performed. That is, the elevator determines whether or not it is traveling (step n6), and when it is traveling,
Stop at the nearest floor (step n7), open the door (step n8), and close the door after a lapse of a predetermined time (step n).
9), it is judged whether the door open button is pushed in the car (step n10), and when it is not pushed, the output of the first level is manually or automatically reset (step n11) to return to the normal operation. (Step n12).

At step n5, when the vibration is equal to or higher than the second level, the control operation similar to the conventional "low" case is performed. That is, the elevator determines whether or not it is running (step n13), and when it is running, stops at the nearest floor (step n14), opens the door (step n15), and opens the door after a predetermined time elapses. Close (step n16), determine whether the door open button has been pressed in the car (step n17), and if not,
The operation is stopped (step n18).

Since the control operation is performed after it is determined that an earthquake has occurred, there is no excessive operation due to construction vibration as in the conventional case, and the elevator operation should be stopped at the second level. Then, the operation of the elevator can be reliably stopped.

In the above-mentioned embodiment, the vibration energy is compared with the preset first or second level, but as another embodiment of the present invention, the vibration acceleration is replaced by the preset vibration acceleration in place of the vibration energy. It may be compared to the first or second level.

Although the above embodiment has been described by applying to an elevator control device, the present invention is not limited to an elevator, and for example, in a vehicle, a chemical factory or a power plant, the operation is stopped at the time of an earthquake. It can also be applied to control devices.

[0047]

As described above, according to the present invention, when there is a vibration of a first level or higher, it is judged whether or not there is an earthquake, and when there is an earthquake, the first control operation, for example, ,
The control operation in the case of the conventional "extremely low" in the elevator is performed, and the second control operation, for example, the conventional "low" is performed when there is an earthquake and the vibration is equal to or higher than the second level. It is possible to perform control operation such as suspension of elevator operation as in the case of, and therefore, without excessive operation, and when operation should be stopped, operation can be reliably stopped and safety can be secured. Become.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment to which the present invention is applied.

FIG. 2 is an exploded perspective view of a capacitance sensor.

FIG. 3 is a sectional view of a capacitance sensor.

FIG. 4 is a waveform diagram showing a change in frequency due to vibration.

FIG. 5 is a waveform diagram of vibration acceleration.

FIG. 6 is a diagram showing a moving average process.

FIG. 7 is a diagram showing an acceleration waveform by a moving average process.

FIG. 8 is a diagram showing an acceleration waveform.

FIG. 9 is a diagram showing a membership function of the antecedent part.

FIG. 10 is a diagram showing a membership function of a consequent part.

FIG. 11 is a flowchart for explaining the operation.

FIG. 12 is a flowchart for explaining the operation of the conventional example.

[Explanation of symbols]

 1 Vibration Detection Section 2 Microcomputer 5 CR Oscillation Circuit 10 Capacitance Sensor (Acceleration Sensor)

Claims (1)

[Claims] 1. A control device for detecting an earthquake and performing a required control operation, wherein a vibration detecting section for detecting vibration and a vibration acceleration or vibration energy based on a detection output of the vibration detecting section are set in advance. A discriminating unit that discriminates whether or not an earthquake occurs when the vibration level is equal to or higher than a first level, and the vibration acceleration or vibration energy is determined by the determining unit to be greater than the first level. When the value is less than the second level which is also high, the first control operation is performed, the determination unit determines that it is an earthquake, and the vibration acceleration or vibration energy is equal to or higher than the second level. And a control unit that performs a second control operation.