CN101723217A - Security device for elevator - Google Patents
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- CN101723217A CN101723217A CN200910170898A CN200910170898A CN101723217A CN 101723217 A CN101723217 A CN 101723217A CN 200910170898 A CN200910170898 A CN 200910170898A CN 200910170898 A CN200910170898 A CN 200910170898A CN 101723217 A CN101723217 A CN 101723217A
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Abstract
The invention provides a security device for elevator which can conveniently and highly precisely detect using a speed sensor in Doppler method. The speed sensor is installed on the installation block in a up-down symmetrical mode or a fore-aft symmetrical mode. The installation block is fixed to the elevator cage, and the two speed sensors are disposed so they have substantially the same irradiation angle with respect to the moving surface, and the security device for the elevator is disposed to correct of the irradiation angle according to the detection signal of the two speed sensors. Moreover, the computing device includes two signal processing devices connected with the speed sensor and a switch unit for outputting the output of the two speed sensors to arbitrary one of the signal process device, so that even one from the two speed sensors fails, the other speed sensor can perform highly precise speed detection with the same precision.
Description
Technical field
The present invention relates to a kind of safety device for elevator, especially relate to and a kind ofly directly speed sensor being installed on the lift car, and make the safety device for elevator of emergency braking apparatus action according to the detection speed of speed sensor.
Background technology
As the speed detection method of existing lift car, can list the method that doppler sensor is installed on lift car.In addition, also propose to have to shine electromagnetic wave, make that the distance between reflecting surface and the speed sensor keeps certain, dwindle the scheme (for example with reference to patent documentation 1) of error thus obliquely with respect to travel direction.
In addition, according to above-mentioned patent documentation 1, it is provided with governor rope sheave and coder and tension roller and speed controller rope, and detects the speed of lift car on the ground.Then, the speed and the velocity amplitude that is arranged on the speed sensor on the lift car of detected lift car on the ground compared, judge the skid level between rope sheave and the speed controller rope thus.
Patent documentation 1WO2005/115903 (the 26th page, Figure 32)
In the method for the described speed sensor that Doppler's mode is installed in the inclination mode of above-mentioned patent documentation 1, owing to the reflecting surface as speed sensor such as the wall of guide rail and hoist trunk can be used, so there is no need governor and speed controller rope etc. are installed in hoist trunk, thereby can reduce the cost of system.But the speed sensor of Doppler's mode exists the installation error sensitivity, as long as small deviation occurs because of installation error causes irradiating angle, will cause the problem of the measurement generation error of speed sensor.Because existing scheme is not made consideration to the influence of this problem, detect so be difficult to realize high-accuracy speed.
In addition, if with the deviation that existing design is proofreaied and correct the irradiating angle that the installation error by speed sensor causes, then can adopt being the method that benchmark comes the irradiating angle value of corrected speed sensor by the detected elevator car speed of coder that is installed on the rope sheave.But, if employing said method, just the amount of skidding between rope and the rope sheave need be controlled in the minimum scope, and to accomplish this point, then need to take in lift car, to be provided with counterweight block, so that the weight of balance heavy side and the mutually equal measure of the weight of lift car side need a large amount of labour of cost and the problem of carrying out loaded down with trivial details operation thereby exist.
Summary of the invention
The present invention makes in view of the present situation of above-mentioned prior art, the object of the present invention is to provide a kind of safety device for elevator, and this safety device for elevator can use the speed sensor of Doppler's mode to detect easily and accurately.
To achieve these goals, a first aspect of the present invention relates to a kind of safety device for elevator, it possesses speed sensor, arithmetical device, emergency braking apparatus and control setup, described speed sensor shines electromagnetic wave from lift car towards all-moving surface, and receive this electromagnetic backward wave, described arithmetical device is calculated the speed of described lift car according to the Doppler shift amount (Doppler shift amount) of described backward wave, described emergency braking apparatus moves by electric signal, described control setup is when having surpassed predefined limited speed by the detected detection speed of described speed sensor, send action command to described emergency braking apparatus, described safety device for elevator is characterised in that, two described speed sensors are installed, described two speed sensors are so that symmetry or front and back symmetrical manner are installed on the mounting blocks up and down, and this mounting blocks is fixed on the described lift car, in addition, the irradiating angle with respect to all-moving surface that described two speed sensors are configured to two speed sensors is roughly the same, and described safety device for elevator is proofreaied and correct described irradiating angle according to the detection signal of described two speed sensors.
In having the related safety device for elevator by first aspect present invention of said structure, two speed sensors are arranged on the lift car, and the irradiating angle of two speed sensors is configured to roughly the same, and above-mentioned safety device for elevator is proofreaied and correct the irradiating angle of these two speed sensors itself according to the detection signal of above-mentioned two speed sensors.Be specifically, obtain the degree of dip of mounting blocks according to the angle that constitutes between the intersecting angle of the speed component of the speed of lift car, direction of illumination, each speed sensor and vertical line and the electromagnetic wave, and this value of obtaining is proofreaied and correct the irradiating angle of two speed sensors as compensation value.Thus, can use the speed sensor of Doppler's mode to detect easily and accurately.
In addition, the related safety device for elevator of a second aspect of the present invention is characterised in that, has in described arithmetical device and two signal processor unit of described speed sensor bonded assembly and the switch unit that the output of described two speed sensors outputed to any signal processor unit in described two signal processor unit.
In having the related safety device for elevator by second aspect present invention of said structure,, be input to respectively in each signal processor unit by the output of switch unit, and obtain compensation value two speed sensors at the timing that carries out irradiating angle.When normally moving, be input to respectively in each signal processor unit by the output of switch unit a speed sensor, on the other hand, when in a speed sensor, having taken place when unusual, be input to respectively in each signal processor unit by the output of switch unit, to proceed operation another speed sensor.Thus, can obtain to have the safety device of high precision and high reliability.
And the related safety device for elevator of a third aspect of the present invention is characterised in that the vertical cross-section of described mounting blocks roughly is the equicrural triangle shape that drift angle is an acute angle, and the attachment face of described speed sensor intersects with described acute angle.
In having the related safety device for elevator by third aspect present invention of said structure, on the attachment face that intersects with acute angle of the mounting blocks that roughly is the equicrural triangle shape, two speed sensors are installed.Thus, can effectively two speed sensors be arranged to have roughly the same irradiating angle with respect to all-moving surface.
In addition, the related safety device for elevator of a fourth aspect of the present invention is characterised in that, the described speed sensor of direction of illumination in the described speed sensor towards the top is installed in upside, and another the described speed sensor towards the below of the direction of illumination in the described speed sensor is installed in downside.
In having the related safety device for elevator by fourth aspect present invention of said structure, by the speed sensor of the direction of illumination in the speed sensor towards the top is installed in upside, and another speed sensor towards the below of the direction of illumination in the speed sensor is installed in downside, can realizes concerning the speed detection of lift car it being very rational apparatus structure.
And, the related safety device for elevator of a fifth aspect of the present invention is characterised in that, described two speed sensors are arranged on the both sides of guide rail with the front and back symmetrical manner, and with roughly the same angle respectively towards the front and back irradiation electromagnetic wave of described guide rail.
In having the related safety device for elevator by fifth aspect present invention of said structure, by two speed sensors are arranged on the both sides of guide rail with the front and back symmetrical manner, and respectively towards the front and back irradiation electromagnetic wave of described guide rail, make it possible to proofread and correct the irradiating angle of two speed sensors self according to the detection signal of two speed sensors with roughly the same angle.
Again, the related safety device for elevator of a sixth aspect of the present invention is characterised in that, the vertical cross-section rectangular in shape of described mounting blocks, described two speed sensors are installed on the described mounting blocks in the mode that the position that forms the diagonal angle concerns, and be arranged on the both sides of guide rail with the front and back symmetrical manner, and with roughly the same angle respectively towards the front and back irradiation electromagnetic wave of described guide rail.
In having the related safety device for elevator by sixth aspect present invention of said structure, the vertical cross-section rectangular in shape of mounting blocks, two speed sensors are installed on the mounting blocks in the mode that the position that becomes the diagonal angle concerns, and are arranged on the both sides of guide rail with the front and back symmetrical manner.Thus, can effectively two speed sensors be arranged to respect to all-moving surface, the irradiating angle of two speed sensors is roughly the same.
The invention effect
According to the present invention, by the irradiating angle of corrected speed sensor, can use the speed sensor of Doppler's mode to carry out high-precision measurement, can realize having the safety device for elevator of high reliability thus.In addition, two speed sensors are installed on the lift car, and detection signal according to these two speed sensors, irradiating angle to these two speed sensors self is proofreaied and correct, therefore, do not need as prior art, to spend a large amount of labour and carry out loaded down with trivial details operation and just can proofread and correct the irradiating angle of speed sensor easily.In addition, even fault has taken place the some speed sensors in two speed sensors, detect owing to can carry out high-accuracy speed with equal precision, so can construct the safety device of high reliability by another speed sensor.
Description of drawings
Fig. 1 is the structural representation of first embodiment of expression safety device for elevator involved in the present invention.
Fig. 2 is the structure of expression speed sensor and the front view of electromagnetic shape and irradiating angle.
Fig. 3 is the block diagram that concerns between the angle of inclination of expression lift car and speed sensor.
Fig. 4 is the front view of the calibrating method at expression angle of inclination.
Fig. 5 is the front view of the method for measurement of expression irradiating angle.
Fig. 6 is the instruction diagram of the structure of the movable reflecting surface of expression.
Fig. 7 is the constructional drawing of the summary of expression arithmetical device.
Fig. 8 is the problem analysis diagram of processing of the arithmetical device of expression timing.
The problem analysis diagram of the processing of the arithmetical device when Fig. 9 is the expression operation.
Figure 10 is the problem analysis diagram of the processing of expression control setup.
Figure 11 is the instruction diagram of the setting example of expression limited speed.
Figure 12 is the constructional drawing of second embodiment of expression safety device for elevator involved in the present invention.
Figure 13 is the constructional drawing of the 3rd embodiment of expression safety device for elevator involved in the present invention.
Nomenclature
1 hoist trunk
2 guide rails
3 lift cars
10 mounting blocks
11A, the 11B speed sensor
12 reflecting surfaces
13 arithmetical devices
14 emergency braking apparatus
15 control setups
27A, the 27B signal processor unit
28 coupled twin switches (switch unit)
The specific embodiment
Followingly be elaborated with reference to the embodiment of accompanying drawing to safety device for elevator involved in the present invention.
Fig. 1 is the structural representation of first embodiment of expression safety device for elevator involved in the present invention, Fig. 2 is the structure of expression speed sensor and the front view of electromagnetic shape and irradiating angle, Fig. 3 is the block diagram that concerns between the angle of inclination of expression lift car and speed sensor, Fig. 4 is the front view of the calibrating method at expression angle of inclination, Fig. 5 is the front view of the method for measurement of expression irradiating angle, Fig. 6 is the instruction diagram of the structure of the movable reflecting surface of expression, Fig. 7 is the constructional drawing of the summary of expression arithmetical device, Fig. 8 is problem analysis diagram (the Problem Analysis Diagram of processing of the arithmetical device of expression timing, PAD figure), the problem analysis diagram of the processing of the arithmetical device when Fig. 9 is the expression operation, Figure 10 is the problem analysis diagram of the processing of expression control setup, and Figure 11 is the instruction diagram of the setting example of expression limited speed.
The safety device for elevator of first embodiment as shown in Figure 1, in Fig. 1, the up and down whole length of hoist trunk 1 is provided with guide rail 2, guides the guide roller 4 of the upper and lower that is installed in lift car 3 by this guide rail 2.Hoist cable 5 is wound on the rope sheave 6 and deflection sheave 7 that is positioned at hoist trunk 1 top, and extend towards the below at its two ends, and an end wherein is fixed on lift car 3, and the other end is fixed on the counterbalanced weight 8.By driving rope sheave 6, lift car 3 is moved at above-below direction along guide rail 2 with electrical motor 9.
In addition, in the side of lift car 3, speed sensor 11A is installed, 11B on mounting blocks 10. Speed sensor 11A, 11B shines electromagnetic waves from the side of lift car 3 towards the reflecting surface 12 of setting spaced apart.Reflecting surface 12 can be the wall of hoist trunk 1, also can be guide rail 2.
Again, speed sensor 11A is installed, the mounting blocks 10 of 11B is that the drift angle of vertical cross-section is the triangular prism that roughly is the equicrural triangle shape of acute angle.And, in the first embodiment, because vertex of a triangle has been made chamfered, so be polygonal shape.The mounting blocks 10 that use has above-mentioned shape comes installation rate sensor 11A, 11B.It is on the dip plane that speed sensor 11A, 11B are installed in the above-mentioned long limit that is roughly the mounting blocks 10 of equicrural triangle.This base that is roughly the mounting blocks 10 of equicrural triangle is that vertical plane surface is installed on the lift car 3.
And, be provided with arithmetical device 13 and control setup 15 and emergency braking apparatus 14 in the lift car 3.Arithmetical device 13 is according to speed sensor 11A, the detection signal of 11B is calculated the speed of lift car 3, when control setup 15 has surpassed predefined specified speed (for example for command speed 1.4 times) in the speed of lift car 3, to emergency braking apparatus 14 output action command signals, described emergency braking apparatus 14 is arranged on the side of the bottom of lift car 3, it moves when having imported described action command signal, embraces guide rail 2 so that lift car 3 is braked.
More than the structure of safety device is described.When causing lift car 3 unusual acceleration to occur when fault has taken place, emergency braking apparatus 14 actions and lift car 3 is promptly stopped.
Followingly the structure and the principle of measurement of sensor monomer are described with reference to Fig. 2.In addition, for convenience's sake, in Fig. 2, only show speed sensor 11A, and the structure of speed sensor 11B is identical with speed sensor 11A.
In speed sensor 11A, make from transmitting-receiving by lens 18 and secondary lens 19 to have orientation, thereby shine reflecting surface 12 with identical irradiating angle θ A with the electromagnetic wave 16 that antenna 17 penetrates.
In addition, speed sensor 11A with the irradiating angle θ A of regulation in reflecting surface 12 irradiation electromagnetic waves 16, speed sensor 11B shines electromagnetic waves 16 with the irradiating angle θ B of regulation to reflecting surface 12, comes detection speed v by the backward wave that receives electromagnetic wave 16.When transmission frequency is set at f0, since Doppler effect, the frequency deviation of backward wave frequency f d as shown in Equation 1.
Fd=2*f0*v*cos (θ)/c formula 1
Wherein, the c of formula 1 represents the light velocity.Thus, (Fast Fourier Transform, the FFT) signal conditioning of Denging can be calculated doppler shifted frequency fd, and the formula 2 that can be used as the deformation type of formula 1 is further calculated speed v by backward wave being implemented the high speed Fourier transform.
V=c*fd/ (2*f0*cos (θ)) formula 2
From formula 1 as can be known, along with the variation of the size of irradiating angle θ, because of the size of Doppler effect out-of-position frequency also changes, thus can be to speed sensor 11A, the speed resolution capability of 11B (speed resolution) exerts an influence.Therefore, when needs make two speed sensor 11A, 11B preferably is arranged to identical angle with irradiating angle θ A with irradiating angle θ B during with equal accuracy detection speed.In addition, by two speed sensor 11A being set with symmetrical manner up and down, 11B, and irradiating angle θ A and irradiating angle θ B be arranged to roughly the same angle, even two speed sensor 11A have one fault has taken place among the 11B, also can carry out speed with equal precision and detect by another speed sensor, thus, can improve the reliability of safety device.
In addition, from formula 2 as can be known, need be the time, be necessary to reduce the error of irradiating angle θ with the speed of high precision computation lift car., even in high-precision mode speed sensor 11A is set, 11B also can produce small deviation unavoidably.So in the present invention, by to speed sensor 11A, the irradiating angle θ A of 11B, θ B proofread and correct the influence of eliminating installation error etc.
Followingly illustrate that with reference to Fig. 3 installation error etc. is to influence of measurement error.Wherein, represent speed sensor 11A, the degree of dip of 11B with angle of roll (rollangle) α, yaw angle (yaw angle) β and pitch angle (pitch angle) γ.
Lift car 3 travels on the good guide rail 2 of setting accuracy, so the amplitude of fluctuation of the degree of dip of each when travelling is less than ± 1 degree, so consequent measured error is about 0.01m/s, in allowed band.
In contrast to this, speed sensor 11A, the installation error of 11B is bigger.Below this is elaborated.At first, because yaw angle β and pitch angle γ be to irradiating angle θ A, θ B does not exert an influence, so do not exert an influence to measuring yet.Wherein, have only angle of roll α to irradiating angle θ A, θ B directly exerts an influence, so it also exerts an influence to measuring.Therefore, need be with the speed of high Precision Detection lift car the time, with speed sensor 11A, after 11B is installed on the lift car 3, be necessary the A to irradiating angle θ, the setting value of θ B is proofreaied and correct.
Following with reference to Fig. 4 to speed sensor 11A, the irradiating angle θ A of 11B, the calibrating method of θ B describes.
As mentioned above, two speed sensor 11A, 11B is installed on the mounting blocks 10 with symmetrical manner up and down, and when the leaning angle ψ of mounting blocks 10 is 0 when spending, the irradiating angle of each speed sensor is respectively θ A, θ B.At this, in order to make two speed sensor 11A, 11B has roughly the same resolution capability, and with irradiating angle θ A, θ B is arranged to roughly the same angle.In addition, the intersecting angle of two electromagnetic axles is θ C (hereinafter referred to as " intersecting angle θ C "), the vertical line of orientating reflex face 12 and the angle θ CA between the electromagnetic wave, θ CB (hereinafter referred to as " the angle θ CA between vertical line and the electromagnetic wave, θ CB ").Described angle adopts the method for explanation hereinafter to record with high-precision method in advance.
After being installed to mounting blocks 10 on the lift car 3, mounting blocks 10 and speed sensor 11A, 11B are former thereby the inclination that degree of dip is ψ occurs because of installation error etc.In order to eliminate its influence, obtain irradiating angle θ A, the compensation value ψ of θ B.Below the method for obtaining of compensation value ψ is described.
At first, use formula 3 and formula 4 are calculated the speed component of each direction of illumination up and down.
VA=1/2*c*fdA/f0 formula 3
VB=1/2*c*fdB/f0 formula 4
According to the speed component vA of each direction of illumination, the intersecting angle θ C of vB and these velocity vectoies, employing formula 5 is calculated speed v.
V=(vA^2+vB^2-2*vA*vB*cos (θ C)) ^0.5/sin (θ C) formula 5
Then, according to the angle θ CA between speed v, speed component vA, intersecting angle θ C and vertical line and the electromagnetic wave, employing formula 6 is calculated the degree of dip ψ of mounting blocks 10.
ψ=arccos (vA/v)-(θ C-θ CA) formula 6
After this, the degree of dip ψ of the mounting blocks 10 that will obtain according to formula 6 is set at compensation value, so that the irradiating angle θ in the formula 2 is proofreaied and correct.Be, the irradiating angle θ of speed sensor 11A to be provided as the θ A ' of formula 7 specifically in the formula 2 that is used for obtaining speed v.
θ A '=θ A+ ψ formula 7
Equally, the irradiating angle θ of speed sensor 11B is provided as the θ B ' of following formula 8.
θ B '=θ B-ψ formula 8
Following with reference to Fig. 5 to irradiating angle θ A, θ B and two speed sensor 11A, the electromagnetic axle 16A of 11B, the method for obtaining of the intersecting angle θ C that 16B intersects describes.
At first, the bottom surface of mounting blocks 10 is installed in through on the precision machined anchor clamps 20, then anchor clamps 20 are fixed on the horizontal surface 22, make level and movable reflecting surface 21 and anchor clamps 20 keeping parallelisms (structure explanation in the aftermentioned part of level and movable reflecting surface 21).Under this state, with known datum velocity v0 movable reflecting surface 21 is moved, by speed sensor 11A, 11B is the electromagnetic wave of f0 and measures this electromagnetic backward wave to reflecting surface 21 irradiation frequencies.When the doppler shifted frequency of backward wave is set at fd, can be that formula 9 is calculated irradiating angle θ by the deformation type of formula 1.
θ=arccos (c*fd/ (2*v0*f0) formula 9
Use formula 9 is calculated two speed sensor 11A up and down, the irradiating angle θ A of 11B, and θ B obtains towards the vertical line of movable reflecting surface 21 and the angle θ CA between the electromagnetic wave, and θ CB obtains two electromagnetic axle 16A, the intersecting angle θ C that 16B intersects at last.
The angle value of obtaining by said method, irradiating angle θ A just, θ B and intersecting angle θ C as illustrated hereinbefore, use when the value of the irradiating angle θ of corrector 2.Therefore, respectively to speed sensor 11A, 11B and mounting blocks 10 are given identification number, to carry out the management of angle information.Be specifically, record is through the speed sensor 11A of combination, and the numbering of the numbering of 11B and mounting blocks 10 makes it possible to angle information is carried out reference.In addition, with speed sensor 11A, after 11B pulls down from mounting blocks 10, the angle value of obtaining before pulling down can change, therefore, and need be with speed sensor 11A, 11B takes the erecting stage of lift car 3 under the state that is installed in mounting blocks 10, and is directly installed on the lift car 3.
Followingly the structure of level and movable reflecting surface 21 is described with reference to Fig. 6.
As movable reflecting surface 21, use enough big horizontal plate 21A.This horizontal plate 21A is supported to can moving towards the depth direction of figure by being installed in spheroid 23 on the horizontal pedestal 22, and can be to the mobile high-accuracy speed control of carrying out of this horizontal plate 21A.Then, speed sensor 11A will be installed, the mounting blocks 10 of 11B is fixed on the position of regulation, and measures known speed.
Followingly the structure of arithmetical device 13 is described in detail with reference to Fig. 7.
As shown in Figure 7, be provided with separately independently signal processor unit 27A in the arithmetical device 13,27B, and two speed sensor 11A, 11B by switch unit respectively with two signal processor unit 27A, 27B connects, wherein, switch unit for example is a coupled twin switch 28.Signal processor unit 27A, 27B adopt the method for calculating that formerly illustrated to calculate the speed of lift car, and the velocity amplitude of being calculated is outputed in the control setup 15.In addition, the information and the mis-information of this content of normal termination output in the control setup 15 also will to represent speed calculation.More than the overview of arithmetical device 13 is described, by the switching of coupled twin switch 28, arithmetical device 13 can carry out two kinds of processing.
The following processing that is timing to first kind of processing of arithmetical device 13 with reference to Fig. 8 describes.
Correction is carried out (STEP1) under the state that the coupled twin switch 28 of arithmetical device 13 is connected.After connecting coupled twin switch 28, the output signal (STEP2) of arithmetical device 13 input speed sensor 11A and these two speed sensors of speed sensor 11B.Adopt the method that had before illustrated, at first computation speed v (STEP3).When because of speed sensor 11A, 11B et out of order etc. and when to cause the result of calculation of speed be nonumeric NULL (STEP4), with the content setting of mis-information be " false ' F ' " (STEP5).On the other hand, obtaining under the normal occasion of data, with the content setting of mis-information be " true ' T ' " (STEP6), and further calculate the compensation value ψ (STEP7) of irradiating angle.The compensation value ψ that calculated storage and memory are in the memory device of arithmetical device 13 self (STEP8).Then, speed v and the misinformation of being measured outputed to (STEP9) in the control setup 15, the safety device action when proofreading and correct operation, occurred also can making under the unusual situation even make.
Followingly the processing of the arithmetical device 13 in when operation is described with reference to Fig. 9.
When normal operation, make coupled twin switch 28 be in open circuited state (STEP1).Thus, safety device for elevator is in and has two independently speed sensor 11A, the state of 11B.At this moment, different with the situation of above-mentioned timing, when operation, each signal processor unit 27A, 27B only imports the signal of a speed sensor corresponding with it, for example the signal of speed sensor 11A (STEP2).Then, such as previously described, employing formula 2 is calculated speed v.At this moment, as irradiating angle θ, use through the value (STEP3) after the compensation value ψ correction.According to the result of calculation of speed, in mis-information, set " true ' T ' " or " false ' F ' " (STEP5), (STEP6).At last, speed v and misinformation are outputed to (STEP7) in the control setup.
Followingly the processing of control setup 15 is described with reference to Figure 10.
Control setup 15 is from two signal processor unit 27A of arithmetical device 13, input speed v and misinformation among the 27B.In addition, in Figure 10, represent with vA by the detected detection speed of speed sensor 11A, misinformation is represented with " err_msgA ", represent with vB that by the detected detection speed of speed sensor 11B misinformation is with " err_msgB " expression (STEP1), (STEP2).Then, when being " true ' T ' " at misinformation, adopt the detected value (STEP3) of either party's speed sensor, (STEP4).And when being " false ' F ' " at a side misinformation, adopting misinformation be that side's of " very ' T ' " the detected value of speed sensor, and makes the opposing party's the detection speed of speed sensor invalid.At this moment, also control setup 15 can be arranged to has a speed sensor (STEP3) unusually to occur to the monitoring room circular that is arranged at a distance, (STEP5), and (STEP6).When if misinformation is " false ' F ' ", control setup 15 makes elevator emergency stop (STEP3) in output motor mode such as cease and desist order, (STEP7).In addition, control setup 15 as the aftermentioned part illustrated, according to the set positions limited speed (STEP8) of elevator.Then, when by speed sensor 11A, the speed v that 11B obtains is during greater than limited speed vlim, is judged as unusual acceleration to have occurred, and to the instruction of emergency braking apparatus 14 output actions, makes lift car 3 promptly stop (STEP9), (STEP10).
Followingly the setting example of limited speed is described with reference to Figure 11.
As shown in figure 11, set limited speed vlim according to the position of lift car 3.In Figure 11, transverse axis is represented the height and position of lift car 3, and the longitudinal axis is represented running velocity vc and limited speed vlim.In the example of Figure 11,, lift car 3 is moved with command speed vr in the zone of intermediate floor running velocity vc being reduced gradually near the position of bottom B with near on the position of top P.Control setup 15 for example is set at 1.4 times of command speed vr with the limited speed vlim of intermediate floor, and more near end floor B, during P, set the value of limited speed vlim low more.
According to first embodiment, by corrected speed sensor 11A, the irradiating angle of 11B can use the speed sensor of Doppler's mode to carry out high-precision measurement, thus, can realize the safety device for elevator of high reliability.In addition, with two speed sensor 11A, 11B is installed on the lift car 3, and according to these two speed sensor 11A, the detection signal of 11B, irradiating angle to these two speed sensors self is proofreaied and correct, and thus, does not need to spend a large amount of labours and carry out loaded down with trivial details operation as prior art and just can proofread and correct the irradiating angle of speed sensor easily.In addition, owing to the time also can proofread and correct at any time, so can in time handle the variation of the irradiating angle that the catabiosis such as loosening and infinitesimal deformation because of fixed part cause in operation.Even fault has taken place the some speed sensors in two speed sensors, detect owing to can carry out high-accuracy speed with equal precision, so can construct the safety device of high reliability by another speed sensor again.
Figure 12 is the constructional drawing of second embodiment of expression safety device for elevator involved in the present invention.In Figure 12, the part identical with above-mentioned embodiment adopts identical symbolic representation.
In the safety device for elevator of second embodiment shown in Figure 12, speed sensor 11A, 11b is provided with the front and back symmetrical manner.At this moment, reflecting surface 12 needs two faces.In second embodiment, with speed sensor 11A, 11B is arranged on the front and rear part of lift car 3 with symmetrical manner, and the front and back of guide rail 2 is used as reflecting surface respectively.In addition, irradiating angle θ A, the vertical line of θ B, orientating reflex face 12 and the angle θ CA between the electromagnetic wave, the definition of θ CB and electromagnetic intersecting angle θ C can be adopted and the above-mentioned identical definition of occasion that two speed sensors are set up and down symmetrically.So method of measurement is identical.
Figure 13 is the constructional drawing of the 3rd embodiment of expression safety device for elevator involved in the present invention.In Figure 13, the part identical with above-mentioned embodiment adopts identical symbolic representation.
In the safety device for elevator of the 3rd embodiment shown in Figure 13, adopting vertical cross-section is rectangular mounting blocks 10. Two speed sensor 11A, 11B is arranged on this mounting blocks 10 in the mode that the position that forms the diagonal angle concerns.In addition, tilt by making mounting blocks 10, make it possible to the front and back symmetrical manner speed sensor 11A, 11B is arranged on the both sides of guide rail 2.Again, irradiating angle θ A, the vertical line of θ B, orientating reflex face 12 and the angle θ CA between the electromagnetic wave, the definition of θ CB and electromagnetic intersecting angle θ C can be adopted and the above-mentioned identical definition of occasion that two speed sensors are set up and down symmetrically.So method of measurement is identical.
Claims (6)
1. safety device for elevator, it possesses speed sensor, arithmetical device, emergency braking apparatus and control setup, described speed sensor shines electromagnetic wave from lift car towards all-moving surface, and receive this electromagnetic backward wave, described arithmetical device is calculated the speed of described lift car according to the Doppler shift amount of described backward wave, described emergency braking apparatus moves by electric signal, described control setup is when having surpassed predefined limited speed by the detected detection speed of described speed sensor, send action command to described emergency braking apparatus, described safety device for elevator is characterised in that
Two described speed sensors are installed, described two speed sensors are so that symmetry or front and back symmetrical manner are installed on the mounting blocks up and down, and this mounting blocks is fixed on the described lift car, in addition, the irradiating angle with respect to all-moving surface that described two speed sensors are configured to two speed sensors is roughly the same, and described safety device for elevator is proofreaied and correct described irradiating angle according to the detection signal of described two speed sensors.
2. safety device for elevator as claimed in claim 1 is characterized in that,
Have in the described arithmetical device and two signal processor unit of described speed sensor bonded assembly and the switch unit that the output of described two speed sensors outputed to any signal processor unit in described two signal processor unit.
3. safety device for elevator as claimed in claim 1 is characterized in that,
The vertical cross-section of described mounting blocks roughly is the equicrural triangle shape that drift angle is an acute angle, and the attachment face of described speed sensor intersects with described acute angle.
4. safety device for elevator as claimed in claim 1 is characterized in that,
The described speed sensor of direction of illumination in the described speed sensor towards the top is installed in upside, and another the described speed sensor towards the below of the direction of illumination in the described speed sensor is installed in downside.
5. safety device for elevator as claimed in claim 1 is characterized in that,
Described two speed sensors are arranged on the both sides of guide rail with the front and back symmetrical manner, and with roughly the same angle respectively towards the front and back irradiation electromagnetic wave of described guide rail.
6. safety device for elevator as claimed in claim 1 is characterized in that,
The vertical cross-section rectangular in shape of described mounting blocks, described two speed sensors are installed on the described mounting blocks in the mode that the position that forms the diagonal angle concerns, and be arranged on the both sides of guide rail with the front and back symmetrical manner, and with roughly the same angle respectively towards the front and back irradiation electromagnetic wave of described guide rail.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008276770A JP5297762B2 (en) | 2008-10-28 | 2008-10-28 | Elevator safety equipment |
| JP2008-276770 | 2008-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101723217A true CN101723217A (en) | 2010-06-09 |
| CN101723217B CN101723217B (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101708986A Active CN101723217B (en) | 2008-10-28 | 2009-09-17 | Security device for elevator |
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| Country | Link |
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| JP (1) | JP5297762B2 (en) |
| CN (1) | CN101723217B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976175B (en) * | 2012-11-30 | 2014-12-10 | 江南嘉捷电梯股份有限公司 | Elevator speed measuring device |
| WO2016136371A1 (en) | 2015-02-23 | 2016-09-01 | 三菱電機株式会社 | Movement distance measuring device |
| CN104931715A (en) * | 2015-06-25 | 2015-09-23 | 国新电梯科技有限公司 | Intelligent speed measuring device for high-speed elevator experimental tower |
| CN108083074A (en) * | 2017-12-29 | 2018-05-29 | 苏州江南嘉捷电梯有限公司 | Escalator expansion tightening wheel health degree detection device |
| CN110649367B (en) * | 2019-09-23 | 2020-10-30 | 深圳国人通信技术服务有限公司 | Antenna mounting structure in elevator shaft |
| CN112623893B (en) * | 2020-12-03 | 2023-04-14 | 深圳市普渡科技有限公司 | Elevator floor determining method and device, computer equipment and storage medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61118678A (en) * | 1984-11-14 | 1986-06-05 | Nippon Soken Inc | Speedometer for car |
| JP3120179B2 (en) * | 1990-01-26 | 2000-12-25 | 正照 新村 | Pool water purification equipment |
| JPH0445077A (en) * | 1990-06-11 | 1992-02-14 | Mitsubishi Electric Corp | Elevator controller |
| JPH08160129A (en) * | 1994-12-05 | 1996-06-21 | Uniden Corp | Speed detector |
| JP2000134976A (en) * | 1998-10-28 | 2000-05-12 | Hitachi Ltd | Elevator device using permanent-magnet synchronous motor |
| JP4335511B2 (en) * | 2002-10-01 | 2009-09-30 | 三菱電機株式会社 | Elevator equipment |
| US7614482B2 (en) * | 2004-05-28 | 2009-11-10 | Mitsubishi Denki Kabushiki Kaisha | Elevator rope slip detector and elevator system |
-
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5297762B2 (en) | 2013-09-25 |
| JP2010105754A (en) | 2010-05-13 |
| CN101723217B (en) | 2012-11-21 |
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