CN101531306A - Elevator ropes cross shake detection device - Google Patents

Abstract

The present invention provides a elevator ropes cross shake detection device, capable of estimating correctly a transversal amplitude of the ropes of the building elevator even through the building is wobbling slowly due to a strong wind or a long-period earthquake. The elevator ropes cross shake detection device includes a acceleration instrument (13), having three detection shafts orthogonal with each other; and a ropes cross shake detection unit (14), for estimating and calculating the transversal of the elevator ropes according to the accelerations in each detection shaft direction detected by the acceleration instrument (13). Furthermore, the ropes cross shake detection unit (14) corrects the incline of the detection shaft of the acceleration instrument (13) generated along the jigging motion of the building, then calculates the horizontal direction acceleration acted on the building, and calculates the transversal amplitude of the ropes according to a value obtained by a time integral of the calculated acceleration.

Description

Elevator ropes cross shake detection device

Technical field

The present invention relates to a kind of elevator ropes cross shake detection device, it is used to estimate and calculates the amplitude (lateral amplitude of vibration) of elevator rope when teeter takes place.

Background technology

When high-rise because of the very long long period earthquake of high wind or oscillation period etc. with first natural frequency lentamente during sustained oscillation, elevator rope can produce resonance with the teeter of this building sometimes, makes the amplitude of above-mentioned rope become big.Because various types of equipment are installed in elevator hoistways, so when the amplitude of the rope that has produced teeter becomes big, have such danger: the equipment in rope and the hoistway contacts and causes the damage of equipment, perhaps rope is colluded extension by the ridge in the hoistway (for example, the support unit etc. of supporting the said equipment).

As the prior art that is used to solve such problem, the known technology that such formation is arranged:, control elevator (for example, with reference to patent documentation 1) in having the building of elevator according to the output of this Wave energy sensor by the Wave energy sensor is set.Specifically, about the technology of record in the patent documentation 1, the high wind signal of high wind and a plurality of signals of expression high wind grade have been detected to elevator control gear output expression from the Wave energy sensor.In addition, in the elevator control gear that has received each signal, implement reduced power running, interlayer standby, controlled operation such as stop according to the high wind grade.

Patent documentation 1: Japanese kokai publication hei 5-319720 communique

According to the technology of record in the patent documentation 1, even under the situation that building is slowly swung because of high wind, also can catch building swing itself.But existence can't be judged elevator rope that this building the has problem with which kind of degree swing.

In addition, the current technology that also realizes such formation: by in elevator(lift) machine room etc., seismograph (accelerograph) being set, utilize this seismograph to detect, and make the elevator transfer be controlled operation by the swing that is not the common seimic building of long period earthquake.But have following problem in such elevator: the acceleration/accel rank of setting in order to detect earthquake is big, when building is slowly swung because of high wind or long period earthquake etc., can't detect this swing by accelerograph.

In addition, when high-rise was slowly swung because of high wind or long period earthquake etc., the amplitude that is provided with seismographic top of building can become very big.That is, the seismographic detection axle that is arranged on top of building also tilts significantly.Therefore, even want to utilize above-mentioned seismograph to detect the swing of the building that produces because of high wind or long period earthquake etc., because the error that causes because of the inclination that detects axle is very big, so can't estimate correct rope amplitude from its output valve (acceleration/accel).

Summary of the invention

The present invention finishes in order to solve above-mentioned problem, its purpose is to provide a kind of elevator ropes cross shake detection device, it has considered the inclination of the detection axle of accelerograph, therefore, even at building because of high wind or long period earthquake etc. slowly under the situation of swing, the lateral amplitude of vibration of the rope of the elevator that also can correctly estimate this building and had.

Elevator ropes cross shake detection device of the present invention comprises: accelerograph, and it is arranged in the building with elevator, and has three orthogonal detection axles; With the ropes cross shake detecting unit, accelerograph is detected respectively to detect axial acceleration/accel according to utilizing for it, estimate and calculate the lateral amplitude of vibration of elevator rope generation, revise by the inclination of detection axle that produce, accelerograph to following the building swing for the ropes cross shake detecting unit, obtain the horizontal direction acceleration/accel that acts on building then, and, calculate the lateral amplitude of vibration of rope according to the acceleration/accel of being obtained is carried out the value that time integral obtains.

According to the present invention owing to considered the inclination of the detection axle of accelerograph, so even at building because of high wind or long period earthquake etc. slowly under the situation of swing, the lateral amplitude of vibration of the rope of the elevator that also can correctly estimate this building and had.

Description of drawings

Fig. 1 is the constructional drawing of expression as the elevator ropes cross shake detection device of prerequisite of the present invention.

Fig. 2 is the scheme drawing that the expression building has produced the state of teeter slowly.

Fig. 3 is the scheme drawing that expression acts on the acceleration/accel composition of accelerograph.

Fig. 4 is the constructional drawing of the elevator ropes cross shake detection device in the expression embodiment of the present invention 1.

Label declaration

1,13: accelerograph; 1a, 13a:X axle acceleration; 1b, 13b:Y axle acceleration; 2,14: the ropes cross shake detecting unit; 3a, 3b, 3c: bandpass filter (BPF); 4a, 4b, 4c: amplifier; 5:ADC (A and D converter); 6,15: cord traverse amplitude arithmetical circuit; 7,16,17: the acceleration information acquisition unit; 8,19: vector resultant portion; 9,20: time integral portion; 10,21: cord traverse amplitude estimation portion; 11,22: the rank judging part; 12: the relaying efferent; The 13c:Z axle acceleration; 18: tilt angle calculation portion.

The specific embodiment

In order to illustrate in greater detail the present invention, the present invention will be described with reference to the accompanying drawings.In addition, in each figure, identical or cooresponding part is marked with same numeral, and suitably simplifies or omit its repeat specification.

Embodiment 1

Fig. 1 is the constructional drawing of expression as the elevator ropes cross shake detection device of prerequisite of the present invention.At first, according to Fig. 1 the structure as the elevator ropes cross shake detection device of prerequisite of the present invention is described.

In Fig. 1, the phugoid sensing device is estimated needed component set-up by the amplitude to the elevator rope that produced teeter, specifically, only is made of accelerograph 1 and ropes cross shake detecting unit 2.This phugoid sensing device constitutes the main portion of ropes cross shake detection device.

Accelerograph 1 is arranged on the top of the building that elevator is installed, and for example is set in place in the elevator(lift) machine room of elevator hoistways top.In addition, accelerograph 1 also can be arranged on the arbitrary site of building.But in order to enlarge the detection range (raising accuracy of detection) of building swing, preferably degree of will speed up instrument 1 is arranged near the top of building.

Accelerograph 1 has mutually orthogonal two detection axles (X-axis and a Y-axis), and each detects axle and is configured in respect on the parallel plane, the face of land.That is, the axle horizontal that respectively detects of accelerograph 1 disposes.In addition, detect axial acceleration/accel (hereinafter referred to as " Y-axis acceleration/accel 1b ") from the detected detection axial acceleration/accel (hereinafter referred to as " X-axis acceleration/accel 1a ") of accelerograph 1 output and another.

Above-mentioned ropes cross shake detecting unit 2 has such function: accelerograph 1 is detected respectively to detect axial acceleration/accel according to utilizing, and estimates the amplitude (lateral amplitude of vibration) of the rope when (calculating) elevator rope has produced teeter.In addition, ropes cross shake detecting unit 2 also has such function: according to the lateral amplitude of vibration of the rope that estimates, make elevator carry out suitable controlled operation.

Specifically, about being input to X-axis acceleration/accel 1a and the Y-axis acceleration/accel 1b in the ropes cross shake detecting unit 2, when removed the noise of radio-frequency component in bandpass filter (BPF) 3a and 3b after, the signal that carries out prearranged multiple in amplifier 4a and 4b amplifies, and is input among the ADC5 then.Then, in cord traverse amplitude arithmetical circuit 6, carry out the estimation (calculating) etc. of the lateral amplitude of vibration of rope.

In above-mentioned cord traverse amplitude arithmetical circuit 6, for example have acceleration information acquisition unit 7, vector resultant portion 8, time integral portion 9, cord traverse amplitude estimation portion 10 and rank judging part 11.

Specifically, in cord traverse amplitude arithmetical circuit 6, obtain the acceleration information (a of two axles (X-axis, Y-axis) from ADC5 by acceleration information acquisition unit 7 _x, a _y), the acceleration information of two obtained axles is synthesized in vector resultant portion 8.That is, calculate above-mentioned acceleration information (a by vector resultant portion 8 _x, a _y) the vector resultant value (a) that is synthesized into.

Then,, come acquisition time integrated value (a (t)),, in cord traverse amplitude estimation portion 10, estimate the lateral amplitude of vibration of (calculating) rope according to this time integral value (a (t)) by in time integral portion 9, vector resultant value (a) being carried out time integral.That is, obtain the estimated valve (L of the amplitude of the rope that has produced teeter by cord traverse amplitude estimation portion 10 _v(t)).

In addition, for the estimated valve (L of the lateral amplitude of vibration that obtains above-mentioned vector resultant value (a) and rope _v(t)), for example adopt following formula.

Formula 1

$a=\sqrt{{a_x}^2+{a_{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200810184688E00111.png"\; state="\{\{state\}\}">y</figure-callout>}}}^2}\&CenterDot;\&CenterDot;\&CenterDot;\left(1\right)$

Formula 2

$L_v\left(t\right)=\frac{1-e^{-\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}}{\mathrm{\&zeta;}{\mathrm{\&omega;}}_{0}t}\&CenterDot;\frac{\mathrm{\&pi;}({\mathrm{<figure-callout\; id="1"\; label="c"\; filenames="A200810184688E00111.png,A200810184688E00131.png"\; state="\{\{state\}\}">c</figure-callout>}}_1+c_2)}{8{\mathrm{\&omega;}}_0}\&CenterDot;{\&Integral;}_0^t\left|a\left(\mathrm{\&tau;}\right)\right|\mathrm{d\&tau;}=K(x,t)\&CenterDot;{\&Integral;}_0^t\left|a\left(\mathrm{\&tau;}\right)\right|\mathrm{d\&tau;}\&CenterDot;\&CenterDot;\&CenterDot;\left(2\right)$

Variable is defined as follows.

T: time

ζ: rope rate of attenuation

ω ₀: the rope natural frequency $({\mathrm{\&omega;}}_0=\frac{\mathrm{\&pi;}}{L}\sqrt{\frac{T}{\mathrm{\&rho;}}})$

L: rope lengths

T: rope tension

ρ: rope wire density

In addition, (x is to contain rope natural frequency ω t) to K ₀, the time dependent coefficient entry determined by the time length t of the car position x of elevator and rope swing.

In the cord traverse amplitude arithmetical circuit 6, according to the estimated valve (L of the lateral amplitude of vibration of the rope that obtains like this _v(t)), in rank judging part 11, judge above-mentioned estimated valve (L _v(t)) whether reached intended level (for example LEVEL0 to LEVEL3).Then, be judged as above-mentioned estimated valve (L _v(t)) reached under the situation of intended level,, be used to carry out the instruction of relaying output from 12 outputs of 11 pairs of relaying efferents of rank judging part in order to carry out the controlled operation with the cooresponding elevator of this rank.

In having the elevator ropes cross shake detection device of said structure, when building is slowly swung because of high wind or long period earthquake, tilt with building owing to be arranged at the detection axle of the accelerograph 1 of elevator(lift) machine room etc., so above-mentioned estimated valve (L _v(t)) it is big that error can become.

The related elevator ropes cross shake detection device of the application's invention is finished in order to solve problem as described above.Below its concrete structure is described.

Fig. 2 is the scheme drawing that the state of teeter has slowly taken place the expression building, and Fig. 3 is the scheme drawing that expression acts on the acceleration/accel composition of accelerograph, and Fig. 4 is the constructional drawing of the elevator ropes cross shake detection device in the expression embodiment of the present invention 1.

In Fig. 2 to Fig. 4, the phugoid sensing device is estimated needed component set-up by the amplitude to the elevator rope that produced teeter, specifically, only is made of accelerograph 13 and ropes cross shake detecting unit 14.This phugoid sensing device constitutes the main portion of ropes cross shake detection device.

Accelerograph 13 is arranged on the top (for example elevator(lift) machine room) of the building with elevator.In addition, accelerograph 13 is the same with accelerograph 1, can be arranged on the arbitrary site of building.But in order to enlarge the detection range of building swing, as mentioned above, preferably degree of will speed up instrument 13 is arranged near the top of building.

Accelerograph 13 has each orthogonal three and detects axle (X-axis, Y-axis, Z axle).That is, X-axis and Y-axis are configured in respect on the parallel plane, the face of land (level) under the state that building is not swung, and the Z axle is vertical configuration under equal state.In addition, respectively detect axial acceleration/accel (X-axis acceleration/accel 13a, Y-axis acceleration/accel 13b, Z axle acceleration 13c) from accelerograph 13 outputs.

Above-mentioned ropes cross shake detecting unit 14 has such function: according to utilizing accelerograph 13 detected axial acceleration/accel, the amplitudes (lateral amplitude of vibration) of the rope when estimation (calculating) elevator rope has produced teeter of respectively detecting.In addition, ropes cross shake detecting unit 14 also has such function: according to the lateral amplitude of vibration of the rope that estimates, make elevator carry out suitable controlled operation.

Specifically, about being input to X-axis acceleration/accel 13a, Y-axis acceleration/accel 13b and the Z axle acceleration 13c in the ropes cross shake detecting unit 14, after in bandpass filter (BPF) 3a to 3c, having removed the noise of radio-frequency component, the signal that carries out prearranged multiple in amplifier 4a to 4c amplifies, and is input among the ADC5 then.Then, in cord traverse amplitude arithmetical circuit 15, carry out the estimation (calculating) etc. of the lateral amplitude of vibration of rope.

In above-mentioned cord traverse amplitude arithmetical circuit 15, for example have acceleration information acquisition unit 16 and 17, tilt angle calculation portion 18, vector resultant portion 19, time integral portion 20, cord traverse amplitude estimation portion 21 and rank judging part 22.

Specifically, in cord traverse amplitude arithmetical circuit 15, obtain the acceleration information (a of X-axis and Y-axis from ADC5 by acceleration information acquisition unit 16 _x, a _y), in addition, obtain the acceleration information (a of Z axle from ADC5 by acceleration information acquisition unit 17 _z).

In addition, according to the acceleration information (a of the Z-direction of obtaining by acceleration information acquisition unit 17 _z), in tilt angle calculation portion 18, calculate the degree of dip of above-mentioned Z axle with respect to vertical direction.In addition, Fig. 3 Z axle of representing accelerograph 13 is with respect to the tilted state of angle θ of vertical direction.Then, according to each the acceleration information (a that obtains by acceleration information acquisition unit 16 and 17 _x, a _y, a _z) and the degree of dip of the detection axle of the accelerograph 13 that calculates by tilt angle calculation portion 18, calculate in vector resultant portion 19: the vertical direction acceleration/accel that acts on building is acceleration due to gravity (a _v) and the horizontal direction acceleration/accel be vibration of building acceleration/accel (a _h).

Herein, as shown in Figure 3, above-mentioned acceleration due to gravity (a _v) and vibration of building acceleration/accel (a _h) be expressed from the next.

Formula 3

a _y＝a·sinθ+a _z·cosθ …(3)

Formula 4

a _h＝a·cos _θ-az·sinθ …(4)

In addition, produce in the accelerograph 13, the Z axle can be obtained by following formula with respect to the degree of dip of vertical direction.

Formula 5

cosθ＝a _z0/a _z， $\sin \mathrm{\&theta;}=\&PlusMinus;\sqrt{1-{\mathrm{<figure-callout\; id="2"\; label="cos"\; filenames="A200810184688E00111.png"\; state="\{\{state\}\}">cos</figure-callout>}}^2\mathrm{\&theta;}}\&CenterDot;\&CenterDot;\&CenterDot;\left(5\right)$

Above-mentioned a _Z0Be the initial acceleration of the Z axle of building when not swinging, its acceleration due to gravity with vertical direction is consistent.

In time integral portion 20, by vibration of building acceleration/accel (a to utilizing vector resultant portion 19 to calculate _h) carry out time integral, calculate time integral value (a _h(t)).Then, according to this time integral value (a _h(t)), obtain the estimated valve (L of the cord traverse amplitude under the detection axle bevelled state of having revised accelerograph 13 by cord traverse amplitude estimation portion 21 _Va(t)).In addition, the estimated valve (L of cord traverse amplitude _Va(t)) represent with following formula.

Formula 6

$L_{\mathrm{va}}\left(t\right)=K(x,t)\&CenterDot;{\&Integral;}_0^t\left|a_h\left(\mathrm{\&tau;}\right)\right|\mathrm{d\&tau;}\&CenterDot;\&CenterDot;\&CenterDot;\left(6\right)$

In cord traverse amplitude arithmetical circuit 15, according to the estimated valve (L of the cord traverse amplitude that obtains like this _Va(t)), in rank judging part 22, judge above-mentioned estimated valve (L _Va(t)) whether reach intended level.In addition, the function of rank judging part 22 is identical with the function of above-mentioned rank judging part 11.

According to the embodiment of the present invention 1, though at building because of high wind or long period earthquake etc. slowly under the situation of swing, the lateral amplitude of vibration of the rope of the elevator that also can correctly estimate this building and had.

That is,, can correctly obtain the horizontal direction acceleration/accel (vibration of building acceleration/accel (a that acts on building by follow the inclination of building swing detection axle that produce, accelerograph 13 according to the variation correction of acceleration due to gravity _h)).And, by to this vibration of building acceleration/accel (a _h) carry out time integral and calculate the estimated valve (L of the lateral amplitude of vibration of rope _Va(t)), can improve its precision significantly.

Claims (3)

1. elevator ropes cross shake detection device, it is used to the lateral amplitude of vibration of estimating that elevator rope produces, it is characterized in that,

Above-mentioned elevator ropes cross shake detection device comprises:

Accelerograph, it is arranged in the building with elevator, and has three orthogonal detection axles; With

The ropes cross shake detecting unit, above-mentioned accelerograph is detected respectively to detect axial acceleration/accel according to utilizing for it, and estimate and calculate the lateral amplitude of vibration that elevator rope produces,

Revise by the inclination of detection axle that produce, above-mentioned accelerograph to following above-mentioned building swing for above-mentioned ropes cross shake detecting unit, obtain the horizontal direction acceleration/accel that acts on above-mentioned building then, and, calculate the lateral amplitude of vibration of above-mentioned rope according to the above-mentioned acceleration/accel of obtaining is carried out the value that time integral obtains.

2. elevator ropes cross shake detection device as claimed in claim 1 is characterized in that,

Accelerograph has: by the X-axis of horizontal arrangement under the state of not swinging at building and the detection axle that Y-axis constitutes; And the detection axle that constitutes by the Z axle of vertical configuration under the state of not swinging at building,

The ropes cross shake detecting unit comprises:

Tilt angle calculation portion, it calculates the degree of dip of the Z axle of above-mentioned accelerograph with respect to vertical direction according to the acceleration/accel that utilizes the detected Z-direction of above-mentioned accelerograph;

Vector resultant portion, it calculates the horizontal direction acceleration/accel that acts on above-mentioned building according to utilizing the detected degree of dip that respectively detects axial acceleration/accel and utilize above-mentioned tilt angle calculation portion to calculate of above-mentioned accelerograph;

Time integral portion, its acceleration/accel to the above-mentioned building that utilizes above-mentioned vector resultant portion and calculate carries out time integral; And

Cord traverse amplitude estimation portion, its result of calculation according to above-mentioned time integral portion calculates the lateral amplitude of vibration of elevator rope.

3. elevator ropes cross shake detection device as claimed in claim 1 or 2 is characterized in that,

Accelerograph is arranged on the top of the building with elevator.

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