JP2003112862A - Elevator vibration monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator vibration monitoring device for previously preventing the worsening of the ride comfort of a passenger car. SOLUTION: The elevator vibration monitoring device installed on the passenger car 33 of an elevator 35 for monitoring the vibration of the passenger car 33 comprises a vibration detector 6 for detecting the vibration acceleration of the passenger car 33 and an analyzer 13 for analyzing the vibration acceleration detected by the vibration detector 6 for determining the ride comfort of the elevator 35. The analyzer 13 determines that the ride comfort is worsened when the increment of the vibration acceleration is not less than a prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator vibration monitoring device for monitoring the vibration of an elevator car,
In particular, the present invention relates to an elevator vibration monitoring device capable of preventing deterioration of the riding comfort of a car in advance.

[0002]

2. Description of the Related Art Conventionally, vibration measurement of a car has been carried out during a periodic inspection. However, when determining the riding comfort of the car, the use of the elevator has to be temporarily stopped, so that it is often carried out during the night when the utilization rate of the elevator is low. Further, in order to measure the vibration of a car, an inspector must bring a measuring instrument to each elevator and measure the vibration, which consumes a lot of time and labor cost. Furthermore, if the elevator hoistway conditions change over time and the ride comfort of the car deteriorates, unless passengers contact us,
The condition that the riding comfort is deteriorated is not improved. For this reason, passengers will use the elevator having a bad riding comfort until the next inspection.

FIG. 8 is a diagram showing a conventional elevator vibration monitoring device.

In FIG. 8, an elevator vibration monitoring device 3
Reference numeral 0 denotes a vibration detector 26 provided in the elevator car 14 for detecting vibrations of the car 14, a maintenance control device 24, and a maintenance computer connected to the maintenance control device 24 via the communication means 21. 20 and 20 are provided. Of these, the vibration detector 26 is connected to the maintenance control device 24 via the control cable 23. The maintenance computer 22 is connected to the maintenance control device 24.
The maintenance control device 24 has a maintenance control panel 25, and the maintenance control panel 25 has a memory 25b for storing an automatic program for automatically operating the elevator 35 and a CPU 25a for processing the automatic program.
And a clock 25c are provided and connected to each other.

One end of a rope 4 is connected to the elevator car 14 and a counterweight 4a is connected to the other end of the rope 4. The rope 4 is stretched around a pulley 5a and is driven to be wound up by a drive device 5.
The elevator car 14 is provided with a load detector 17 that detects a load applied to the car 14. The drive device 5 is provided with a speed detector 19 that detects the speed and acceleration of the car 14.

Each floor 27a of the four-story building 27 is provided with a hall call button 18, and each hall call button 18 is connected to a maintenance control device 24. A control device 16 that controls opening and closing of the door of the car 14 is provided above the car 14.

Next, a method for the conventional maintenance control device to judge the riding comfort of the car will be described.

FIG. 9 is a flowchart showing a method of determining the riding comfort of a car by a conventional maintenance control device.

(1) The maintenance control device 24 gives a driving instruction to the drive device 5 at predetermined time zones such as at night, and the drive device 5 presets the elevator car 14 via the rope 4. Each test floor 2 of the building 27
Move to and from 7a. When the elevator car 14 moves, vibration is generated, the vibration detector 26 installed in the car 14 detects the vibration, and the vibration detector 26 detects it in the maintenance control device 24 via the control cable 23. Send vibration acceleration.

(2) The maintenance control device 24 detects the maximum value of the vibration acceleration sent from the vibration detector 26 for each operation mode. Here, the operation mode refers to each mode which is divided into start-up, constant acceleration, constant deceleration, and landing depending on the speed of the car 14. Further, the maintenance control device 24 determines the operation mode based on the speed of the car 14. The vibration acceleration may be calculated by differentiating the vibration speed from the vibration detector.

(3) The maintenance control device 24 compares the set value set for each operation mode with the maximum value of the vibration acceleration, and the maximum value of the vibration acceleration exceeds the set value set for each operation mode. In this case, it is determined that the riding comfort of the car 14 is abnormal. On the other hand, if the maximum value of vibration acceleration does not exceed the set value set for each operation mode,
It is determined that the riding comfort of the car 14 is normal.

[0012]

According to the determination method of the flow chart shown in FIG. 8, even if the state of the hoistway changes and the vibration acceleration of the elevator car 14 actually begins to increase, it will not exceed the predetermined value. The riding comfort of 14 is not determined to be abnormal. Therefore, the actual car 1
Even if the riding comfort of No. 4 is deteriorated, the riding comfort of the car 14 is not determined to be abnormal until the riding comfort exceeds a predetermined reference value, so that the riding comfort is not improved.
That is, even if the riding comfort of the car 14 actually deteriorates, the elevator maintenance work is started only after the deteriorated condition becomes remarkable. Will be done.

As described above, in the conventional elevator vibration monitoring apparatus, passengers are forced to use the elevator having poor riding comfort from the time the deterioration of the riding comfort of the car becomes apparent until the maintenance work of the elevator is started. I don't get it.

The present invention has been made in consideration of such a point, and measures the vibration acceleration of the elevator car and quickly and surely determines the deterioration of the riding comfort based on the vibration acceleration. It is an object of the present invention to provide an elevator vibration monitoring device capable of performing the above.

[0015]

SUMMARY OF THE INVENTION The present invention is an elevator vibration monitoring apparatus for monitoring the vibration of an elevator car, and a vibration detector installed in the car for detecting the vibration acceleration of the car, By analyzing the vibration acceleration from the vibration detector, and an analysis device for determining the ride comfort of the elevator, the analysis device, the increase amount of the vibration acceleration within a predetermined time is equal to or more than a preset upper limit value. In this case, the elevator vibration monitoring device is characterized by determining that the riding comfort has deteriorated.

According to the present invention, when the increase in the vibration acceleration of the car is equal to or more than the upper limit value, it is determined that the riding comfort is deteriorated, and therefore, before the riding comfort of the car is deteriorated,
It can be determined that the riding comfort has deteriorated and the elevator maintenance work can be started.

The present invention relates to an elevator vibration monitoring apparatus for monitoring the vibration of an elevator car, and a vibration detector installed in the car for detecting the vibration acceleration of the car, and a vibration from the vibration detector. An analysis device that analyzes the acceleration to determine the riding comfort of the elevator,
The analysis device detects the maximum value of the vibration acceleration within a predetermined frequency range, and the riding comfort deteriorates when the difference between the maximum value and preset reference data becomes a predetermined value or more. It is an elevator vibration monitoring device characterized by determining that it has done.

According to the present invention, when the difference between the maximum value of the vibration acceleration within a predetermined frequency range and the preset reference data becomes a predetermined value or more, it is determined that the riding comfort is deteriorated. You can Therefore, it is possible to analyze the frequency that greatly affects the riding comfort.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment A first embodiment of an elevator vibration monitoring apparatus according to the present invention will be described below with reference to FIGS. 1 to 6.

FIG. 1 is a diagram showing a first embodiment of an elevator vibration monitoring apparatus according to the present invention.

As shown in FIG. 1, an elevator vibration monitoring apparatus 30 according to the present invention is provided with a car 33 of an elevator 35.
Is installed in the car and monitors the vibration of the car 33.

The car 33 is provided with a car frame 2, a vibration-proof rubber 3 attached to the car frame 2 for absorbing the vibration of the car frame 2, and provided inside the car frame 2 via the vibration-proof rubber 3. It has an inner frame 1 connected to a basket frame 2.

Such an elevator vibration monitoring device 30
Is a vibration detector 6 installed in the inner frame 1 of the car 33 and detecting the vibration acceleration of the inner frame 1 of the car 33, and a load detector for detecting the load applied to the inner frame 1 of the car 33. 7 and the vibration acceleration from the vibration detector 6 are analyzed to analyze the riding comfort of the elevator 35.
It has and. The vibration detector 6 is the car 3
The horizontal and vertical vibration accelerations of the inner frame 1 of 3 are detected.

A data measuring device 10 for measuring the vibration acceleration and the load detected by the detectors 6, 7 is connected to the vibration detector 6 and the load detector 7 via a tail cord 8. To the data measuring device 10, a communication device 11 that transmits data sent from the data measuring device 10 is connected. The data measuring device 10 and the communication device 11 are arranged in a machine room 32 provided outside the elevator 35. The data measuring device 10 may be arranged in the hoistway 34 of the car 33.

A monitoring room 31 is installed outside the elevator 35. Inside the monitoring room 31, the communication device 1 in the machine room 32 is installed.
1, a communication device 11 that receives the data transmitted from 1, and a storage device (database) 12 that is connected to the communication device 11 and that stores the data received by the communication device 11.
An analysis device 13 connected to the storage device 12 is arranged.

One end of the rope 4 is connected to the car 33, and the counterweight 14 is connected to the other end of the rope 4. Further, the rope 4 is stretched around a pulley 5a and is wound up and driven by a drive device 5. The drive unit 5 is connected to an automatic drive unit 9 for instructing the drive unit 5 to drive the car 33 automatically during a time when passengers are less frequently used, such as at night. Device 6, data measuring device 10 and communication device 11
Are connected to this automatic driving device 9.

The elevator vibration monitoring device 30 according to the present invention is designed to monitor the vibration of the elevator without passengers. Therefore, the automatic driving device 9 uses the information from the load detector 7 to determine whether the car 3
When the load applied to the inner frame 1 of 3 is 0, it is determined that no passenger is in the elevator car 33, and vibration monitoring is started. That is, when the automatic driving device 9 confirms that there are no passengers in the car 33, the automatic driving device 9 instructs the drive device 5 to drive the car 33 at a predetermined cycle.
It is designed to make one round trip over the entire ascent and descent process from the bottom floor to the top floor. In this case, several reciprocations may be performed instead of one reciprocation over the entire lifting process. Here, the predetermined cycle means a cycle of about once a week, but this cycle may be set to a cycle of once a day.

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

The automatic driving device 9 determines that the load applied to the inner frame 1 of the car 33 is 0 based on the information from the load detector 7.
At this time, it is determined that the passenger is not riding, and the drive instruction is given to the drive device 5 at a predetermined cycle, and at the same time, the data measurement device 10 is instructed to start the measurement.

When the driving device 5 receives a driving instruction from the automatic driving device 9, the driving device 5 starts winding the rope 4. Rope 4
When the winding is started, the car 33 starts moving upward or downward, and the inner frame 1 of the car 33 vibrates. When vibration occurs in the inner frame 1 of the car 33 in this way, the vibration detector 6 installed in the inner frame 1 of the car 33 detects the vibration acceleration of the inner frame 1 of the car 33 and detects this. The vibration acceleration is transmitted to the data measuring device 10 via the tail code 8.

The data measuring device 10 is the data measuring device 1
The value of the vibration acceleration of the inner frame 1 of the car 33 transmitted to 0 is transmitted to the communication device 11, and the communication device 11 transmits the value of the vibration acceleration to the communication device 11 arranged in the monitoring room 31. . Further, the communication device 1 arranged in the monitoring room 31
The value of the vibration acceleration of the inner frame 1 of the car 33 transmitted to No. 1 is transmitted to the storage device 12, and the storage device 12 stores the value of the vibration acceleration in time series at a predetermined cycle. The analysis device 13 analyzes the vibration acceleration data stored in the storage device 12, and then determines the riding comfort of the elevator 35.

Next, the operation of the analyzer 13 will be described in detail. FIG. 2 shows the relationship between the vibration acceleration of the car stored in the storage device 12 and time. Here, the vertical axis is
The vibration acceleration is shown, and the horizontal axis shows time.

As shown in FIG. 2, the analysis device 13 extracts an arbitrary time zone a from the time-series vibration acceleration stored in the storage device 12, and analyzes the arbitrary time zone a. Further, the analyzer 13 calculates the maximum value b of the vibration acceleration in the measured time zone c.

During this time, the analyzer 13 can specify the position of the car 33 corresponding to the arbitrary time zone a to be extracted, based on the arbitrary time zone a to be extracted. In this case, by changing the arbitrary time zone a extracted by the analyzer 13, it is possible to focus on the vibration of the part to be observed such as the vibration near the middle floor of the building and the vibration near the top floor.

After that, the analyzer 13 is shown in FIG.
As shown in (B), the vibration acceleration from the vibration detector 6 is analyzed to determine the riding comfort of the elevator 35.

Here, FIG. 3A shows the relationship between the absolute value of the vibration acceleration and the upper limit value Vcr of the vibration acceleration in the arbitrary time zone a extracted by the analyzer 13.

In FIG. 3A, the horizontal axis represents the measurement data.
The vertical axis indicates the absolute value V of the vibration acceleration _iIs shown. Well
The measured data are stored in a predetermined cycle (once a week or 1
This is a list of data measured once a day)
At the arbitrary time zone a (Fig. 2) in
It is the one. In addition, n indicates an arbitrary natural number, and a thick line
Vcr is the upper limit of vibration acceleration that ensures a good ride comfort
Indicates the value.

As shown in FIG. 3A, ΔV _i represents the increase amount of the vibration acceleration between the plots, and this increase amount of the vibration acceleration is calculated as follows. If the value of the vibration acceleration corresponding to the plot i is V _i and the value of the vibration acceleration corresponding to the plot i-1 is V _i-1 , the plot i-1
The increase ΔV _i of the vibration acceleration between the plot and the plot i is Δ
It is calculated by calculating V _i = V _i −V _i−1 .

Further, FIG. 3B shows the increase amount ΔV _i of the vibration acceleration and the upper limit value ΔVcr of the vibration acceleration in FIG. 3A.
Shows the relationship with.

Here, the vertical axis represents the increase amount ΔV _{i of the} vibration acceleration.
And the horizontal axis shows the measurement data. Also, the thick line Δ
Vcr represents the upper limit value of the increase amount of the vibration acceleration.

Next, the analyzer 13 determines the riding comfort of the elevator according to the flowchart shown in FIG.

(1) First, as shown in FIG.
3 determines whether or not the value V _i of the vibration acceleration in the arbitrary time zone a extracted from the storage device 12 is larger than the upper limit value Vcr of the vibration acceleration. When the value V _i of the vibration acceleration is larger than the upper limit value Vcr of the vibration acceleration (V _i ≧ Vcr), the analyzer 13 determines that the riding comfort of the elevator 35 has deteriorated.

Here, the upper limit value Vcr of the vibration acceleration is preset in the analyzer 13, but the analyzer 13 may be set to an arbitrary value.

(2) Next, the analysis apparatus 13 causes the value V of the vibration acceleration in the arbitrary time zone a extracted as shown in FIG.
_{When i} is smaller than the upper limit value Vcr of the vibration acceleration (V _i <
Vcr) further determines whether or not the increase amount ΔV _i of the vibration acceleration is larger than the upper limit value ΔVcr of the increase amount of the vibration acceleration. When the increase amount ΔV _i of the vibration acceleration is larger than the upper limit value ΔVcr of the increase amount of the vibration acceleration (ΔV _i ≧ ΔVcr), the analyzer 13 determines that the riding comfort of the elevator 35 is deteriorated, and the vibration acceleration When the increase amount ΔV _i is smaller than the upper limit value ΔVcr of the increase amount of the vibration acceleration (Δ
When V _i <ΔVcr), it is determined that the riding comfort of the elevator 35 has not deteriorated.

Here, the upper limit value ΔVc of the increase amount of the vibration acceleration is
Although r is preset in the analyzer 13, it may be possible to set an arbitrary value in the analyzer 13.

Next, the method by which the analysis device 13 predicts the maintenance time of the elevator will be described with reference to FIG.

FIG. 5 shows a graph predicting a change in vibration acceleration. In FIG. 5, the vertical axis represents vibration acceleration, and the horizontal axis represents measured data. Further, in FIG. 5, a solid line (d) shows a change in the value of the vibration acceleration already stored in the storage device 12, and a broken line (e) shows a change in the vibration acceleration predicted by the analysis device 13.

The analysis device 13 calculates the change (e) in the vibration acceleration by obtaining an approximate curve by the least square method based on the change (d) in the vibration acceleration already stored in the storage device 12. The change (e) of the vibration acceleration composed of this approximate curve may be calculated by another method.

As a result, the increase amount of the vibration acceleration is ΔV _i
Is small and the vibration acceleration shows a gradual increase tendency, even when it is difficult to determine the state of deterioration of the riding comfort of the car 33, the analysis device 13 ensures the time f at which the vibration acceleration exceeds the upper limit value Vcr. It is possible to estimate the time when the maintenance work of the elevator 35 will be started.

As described above, since the analyzer 13 can start the maintenance work of the elevator 35 before the vibration acceleration reaches the upper limit value Vcr, that is, before the riding comfort of the car 33 deteriorates, the passenger always rides. A comfortable elevator 35 can be provided.

Next, a method will be described in which the analyzer 13 performs frequency analysis on the vibration acceleration sent from the vibration detector 6 to determine the riding comfort of the elevator 35.

The vibration acceleration detected by the vibration detector 6 is sent to the analysis device 13, and the analysis device 13 performs frequency analysis on this vibration acceleration, and the frequency component (vibration acceleration for each frequency) for this vibration acceleration is analyzed. ). The analyzer 13 determines the riding comfort of the elevator 35 based on the obtained frequency component.

FIG. 6 shows a graph comparing the reference data with the latest data from the vibration detector. In FIG. 6, the vertical axis represents vibration acceleration, and the horizontal axis represents frequency.

Further, in FIG. 6, the thick line (g) shows the frequency component of the latest data V _i of vibration acceleration, and the thin line (i).
_Shows the frequency component of the vibration acceleration reference data V _i . Here, the initial value V ₁ of the vibration acceleration is set as the reference data V _i , but any value from V ₂ to V _n (n represents a natural number of 3 or more) may be set. .

In FIG. 6, the analyzer 13 performs a frequency analysis on the initial value V ₁ of the vibration acceleration and the latest data V _i of the vibration acceleration sent from the vibration detector 6, and the frequency component of the initial value V ₁ of the vibration acceleration ( i) and the frequency component (g) of the latest data V _i of vibration acceleration are calculated. After that, the analyzer 13 determines the latest data V _{i of the} vibration acceleration.
For the frequency component (g) of the above, a maximum value k of the vibration acceleration and a frequency n corresponding to the maximum value k are obtained within a predetermined frequency range j, and further in the frequency component (i) of the initial value V ₁ of the vibration acceleration. The vibration acceleration m corresponding to the frequency n is calculated. The analysis device 13 determines a difference Δy (Δy = Δy = Δy =
k−m) is calculated, and when the difference Δy exceeds a predetermined value, it is determined that the riding comfort has deteriorated.

Here, the predetermined frequency range j is set to 0 to 10 Hz in the analyzer 13. The frequency range j can be freely changed in the analyzer 13.

By the way, the frequency of the rail irregularity and the vibration from the drive unit 5 during the traveling of the car 33 depends on the vibration proof rubber 3
Since the frequencies of low-order resonance points in the horizontal direction and the vertical direction of the car 33, which are determined by the elastic coefficient of, match and resonate, this resonance greatly affects the riding comfort of passengers. Therefore, by setting the range j of the predetermined frequency in the analyzer 13 from 0 to 10 Hz, the value of the vibration acceleration increases in the frequency band j in which the ride comfort of the car 33 is affected. 35 can be maintained. Therefore, it is possible to provide passengers with a comfortable riding comfort of the elevator 35, which is close to the time of installation.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIG.

FIG. 7 shows a second embodiment of the present invention.

In the embodiment shown in FIG. 7, instead of providing the storage device 12 and the analysis device 13 in the monitoring room 31, the storage device 12 and the analysis device 13 are provided in the machine room 32.

In FIG. 7, the other structure is the same as the first structure shown in FIG.
The embodiment is substantially the same as the embodiment. 7, the same parts as those of the first embodiment shown in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 7, a storage device 12 is connected to the data measuring device 10 in the machine room 32, and an analysis device 13 is connected to the storage device 12. Analyzer 13
A communication device 11 is connected to.

When the analyzer 13 determines that the ride comfort of the elevator 35 has deteriorated, the ride comfort of the elevator 35 deteriorates to the communication device 11 in the monitoring room 31 via the communication device 11 in the machine room 32. And send a signal with.

[0064]

According to the present invention, when the increase in the vibration acceleration of the car is equal to or more than the upper limit value, it is determined that the ride comfort is deteriorated, and thus the ride comfort is improved before the ride comfort of the car is deteriorated. It can be determined that the condition has deteriorated and the elevator maintenance work can be started.

Further, when the difference between the maximum value of the vibration acceleration within the range of the predetermined frequency and the preset reference data becomes equal to or more than the predetermined value, it is determined that the riding comfort is deteriorated, and the riding comfort is determined. Can be analyzed for frequencies that have a large effect on. This makes it possible to provide passengers with an elevator that is always comfortable to ride.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of an elevator vibration monitoring device according to the present invention.

FIG. 2 is a diagram showing a relationship between vibration acceleration detected by a vibration detector and time.

FIG. 3 is a diagram showing a relationship between an absolute value of vibration acceleration and an upper limit value of vibration acceleration.

FIG. 4 is a diagram showing a flowchart of a method of determining the riding comfort of an elevator.

FIG. 5 is a diagram showing prediction of changes in vibration acceleration.

FIG. 6 is a diagram showing a comparison between the reference data and the latest data from the vibration detector.

FIG. 7 is an overall configuration diagram showing a second embodiment of an elevator vibration monitoring device according to the present invention.

FIG. 8 is a diagram showing a conventional elevator vibration monitoring device.

FIG. 9 is a diagram showing a flowchart of a conventional elevator vibration monitoring device.

[Explanation of symbols]

1 inner frame 2 baskets 6 Vibration detector 7 load detector 8 tail cord 10 Data measuring device 11 Communication device 12 storage devices 13 Analyzer 30 Elevator vibration monitor 33 car 35 elevator

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Claims (7)

[Claims] 1. An elevator vibration monitoring apparatus for monitoring the vibration of an elevator car, comprising: a vibration detector installed in the car for detecting the vibration acceleration of the car; and a vibration acceleration from the vibration detector. And an analyzing device for determining the riding comfort of the elevator, wherein the analyzing device determines that the riding comfort deteriorates when the increase amount of the vibration acceleration within a predetermined time is equal to or more than a preset upper limit value. An elevator vibration monitoring device characterized by making a determination. 2. An elevator vibration monitoring device for monitoring vibration of an elevator car, wherein a vibration detector installed in the car and detecting a vibration acceleration of the car, and a vibration acceleration from the vibration detector are detected. And an analyzing device for determining the riding comfort of the elevator, wherein the analyzing device detects a maximum value of vibration acceleration within a range of a predetermined frequency, and the maximum value and preset reference data. An elevator vibration monitoring device, characterized in that it is determined that the riding comfort has deteriorated when the difference between the above and the predetermined value exceeds a predetermined value. 3. The predetermined frequency range is 0 to 10H.
The elevator vibration monitoring device according to claim 2, wherein there is up to z. 4. The elevator vibration monitoring device according to claim 1, further comprising a storage device that stores the vibration acceleration from the vibration detector at a predetermined cycle. 5. The analysis device analyzes the vibration acceleration at an arbitrary time.
Alternatively, the elevator vibration monitoring device according to any one of 2 above. 6. The communication device further comprising a communication device connected to the analysis device, wherein the communication device transmits the data analyzed by the analysis device to the communication device in the monitoring room. The elevator vibration monitoring device according to any one of claims. 7. The elevator vibration monitoring device according to claim 1, wherein the analysis device calculates an approximate curve of vibration acceleration of the car and estimates the maintenance time of the elevator.