CN1692068A - Arrhythmic pulse sequence for sonic distance measurement - Google Patents
Arrhythmic pulse sequence for sonic distance measurement Download PDFInfo
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- CN1692068A CN1692068A CN 02822843 CN02822843A CN1692068A CN 1692068 A CN1692068 A CN 1692068A CN 02822843 CN02822843 CN 02822843 CN 02822843 A CN02822843 A CN 02822843A CN 1692068 A CN1692068 A CN 1692068A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3492—Position or motion detectors or driving means for the detector
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- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
Abstract
A position detecting device for detecting the position of an object (12) movable along a predetermined path of movement, comprising a signal transmission medium (13) extending along the path of movement, a signal generator (15) movable together with said movable object (12), by means of which a signal can be coupled into the signal transmission medium (13), at least one signal receiver (29, 33) at an extraction location in an end portion of said path of movement, a signal propagation time measuring means (35, 37) adapted to determine the signal propagation time between coupling location and extraction location (45), wherein the signal generator (15) is designed to deliver a periodically repeating signal pulse sequence (FIG. 2) in which the time intervals between consecutive signal pulses are different for each pair of consecutive signal pulses each, the period duration of the repetitive signal pulse sequence is greater than the maximum signal propagation time with maximum interval between coupling location and extraction location, and the time intervals between consecutive signal pulses are shorter than the maximum signal propagation time.
Description
Technical field
The present invention relates to be used for target to moving along predetermined tracks, lift car in particular to electric motor driven elevator, the location detecting apparatus that detects of position, this location detecting apparatus comprises: the signal transmission medium that extends along tracks; Can be with the mobile signal generator of described movable object, the coupling position that utilizes this signal generator to change in the motion according to described signal generator couples a signal in the signal transmission medium; At least one signal receiver is positioned at the extracting position of described tracks end points, utilizes this signal receiver can extract signal from signal transmission medium; A signal propagation time measurement mechanism is adapted to pass through the signal that extracts at extracting position is estimated, determines the signal propagation time between coupling position and extracting position; And a processing equipment, be suitable for according to determined signal propagation time, obtain the position signal of expression target along the instantaneous position of tracks.
Background technology
Document EP 0694792 A1 and corresponding US 5736695 A have disclosed this equipment that utilizes ultrasonic energy.Acoustic impluse is coupled in the sound conductor of plain conductor form for example at the audio signal generator of lift car.Receive acoustic impluse in the upper end of elevator rail or the receptor of lower end.Sound according to the pulse of known speed of sound in sound conductor and measurement is advanced or the interval travel time position that can calculate the distance between signal generator and the receptor and calculate the elevator cage in elevator rail thus.
In order to measure the sound transmission time, acoustic impluse that measurement mechanism must receive the end at elevator rail and concrete transmission pulse are mapped exactly.Under the situation of this known equipment, guarantee this point by the sound transmission time between two pulses that make transmission interval greater than from the end to end of sound conductor.Therefore, at a time, on sound conductor, always have only an acoustic impluse, and this acoustic impluse can only belong to the pulse of last transmission.
Disadvantage is that the travel distance of elevator is long more, and the realization speed of observed reading is low more.This make to measure slack-off and to the interference and the white noise of chance, for example the quantizing error in signal processing is very responsive.
For example, from be installed in Olympics, Munich mansion, nearly 200 meters of the track of advancing, running velocity is that the elevator of 7m/s can be seen, can cause some problems in the elevator with the long track of advancing greater than the time gap transmission acoustic impluse in the sound transmission time between the sound conductor two ends.Suppose along the length sound transmission time of plain conductor be per 20 milliseconds 100 meters, then for nearly 200 meters long track of advancing of the elevator of Olympics tower, between the lower end of the track of advancing and upper end, need 40 milliseconds sound transmission time.Between continuous coupled acoustic impluse in metallic conductor under the situation of sound transmission time at metallic conductor two ends, continuous acoustic impluse should have the time gap greater than 40 milliseconds.At running velocity is under the situation of 7m/s, between two continuous acoustic impluses of transmission, and the elevator cage 28cm that should move.For according to the precision of 1mm concerning the modem elevator system that elevator cage is wherein controlled, it is fully not enough only along the track of advancing one-time detection being carried out every 28cm in the position of elevator cage.
Known according to DE 19903645 A1 and corresponding C A 2296472 A1, in order to obtain higher realization speed, send the identical and time gap of each other time gap and be shorter than measurement pulse in the sound transmission time from the sound conductor of the end to end of elevator rail.This has caused at one time, as on the plain conductor of sound conductor a plurality of acoustic impluses is always being arranged.In order these each pulses of measuring pulse to be defined as the concrete measurement pulse that sends at receiver side, except measuring pulse, these also to send synchronizing pulse, in time distance is greater than the maximum propagation time of acoustic impluse from the end to end of sound conductor between the synchronizing pulse, and utilizes predetermined feature to make these synchronizing pulses different with the measurement pulse.For example, between each synchronizing pulse and the adjacent with it measurement pulse time gap is arranged.Like this, can the measurement pulse that receive is corresponding with the synchronizing pulse of last transmission exactly.Then, utilize the identification number relevant, can be mapped in of the concrete measurement pulse of receptor one side with measurement pulse between two continuous synchronization pulses and transmission with each synchronizing pulse.
Yet this method neither be immaculate.On the one hand, can only after arriving, the corresponding synchronous pulse received pulse and the concrete pulse that sends could be mapped.On the other hand, this method considers especially that to because the interference that echo pip causes is very sensitive received pulse does not have the desirable edge of a pulse usually, but the edge of a pulse of distortion.For example, can cause reflection, because be attenuation part in fact at the two ends of sound conductor, but these attenuation parts and incomplete absorption acoustic impluse, but the reflecting part acoustic impluse.At the ad-hoc location along sound conductor, such reflection is met the pulse that does not belong to same transmission pulse.If at ad-hoc location along sound conductor, deletrious interference appears between transmission pulse and echo pip, and then because the time gap of measuring between the pulse is identical, all measure pulse this disturbing influence.
Determine the needed hardware and software of estimating algorithm by the minimum interval between two adjacent pulses.This is more little at interval, and needed processing clock speed is high more, and needed hardware and software is high more and the needed cost of hardware and software is high more.In accordance with known methods, owing to make each synchronizing pulse in adjacent with this synchronizing pulse two facts of measuring between the pulses, hardware and software must be designed to and synchronizing pulse and the measurement pulse adjacent with synchronizing pulse between time master distance or corresponding processing speed at interval.Therefore, hardware and software need be measured the more complicated design of pulse than individual processing.That is, measure pulse for suitably handling, if it is there is not synchronizing pulse, much then simple that hardware and software is just enough.
Summary of the invention
The objective of the invention is to solve the problems referred to above of known method, provide a kind of location detecting apparatus specifically, wherein the distance of the pulse between adjacent measurement pulse is shorter than the signal propagation time between the signal transmission medium two ends and does not need in addition under the situation of synchronizing pulse, and received pulse can be corresponding with transmission pulse exactly.
Utilize location detecting apparatus of the present invention as claimed in claim 1 to realize this purpose.Embodiment according to location detecting apparatus of the present invention has been described in the dependent claims.
The invention provides a kind of location detecting apparatus, be used for the position of the target that can move along predetermined tracks is detected, this position detecting device comprises: the signal transmission medium that extends along tracks; The signal generator that can move with described movable object utilizes this signal generator to couple a signal in the signal transmission medium at the coupling position according to the motion change of described signal generator; At least one signal receiver is positioned at the extracting position of described tracks end points, utilizes this signal receiver can extract signal from signal transmission medium; A signal propagation time measurement mechanism is adapted to pass through the signal that extracts at extracting position is estimated, determines the signal propagation time between coupling position and extracting position; And a processing equipment, be suitable for from determined signal propagation time, obtaining the position signal of expression target along the instantaneous position of tracks.Be characterised in that according to location detecting apparatus of the present invention, its signal generator provides the signal impulse sequence that periodically repeats, wherein, for every pair of continuous signal impulse, time gap difference between the continuous signal pulse, the period of the signal impulse sequence that repeats is greater than the peak signal interval travel time under the ultimate range situation between coupling position and the extracting position, and its feature is that also time gap between the continuous signal pulse is less than the peak signal interval travel time.
The present invention utilizes the arythmia pulse train that periodically repeats, and the pulsion phase with the corresponding transmission of signal generator is corresponding respectively can to make the received signal of continuous arriving signal receptor exactly.Because period, promptly, periodically the peak signal interval travel time between the pulse train that repeats,, this pulse that belongs to same pulse train is always only arranged in signal transfer medium in a certain specified moment interval greater than the ultimate range between coupling position and the extracting position.Because the preset time of the previous pulse of distance is corresponding with a certain pulses of corresponding pulse train at interval, each received pulse that therefore appears at signal receiver can be corresponding with a specific transmission pulse of signal generator transmission exactly.
Utilization is according to arythmia pulse train of the present invention, minimum interval between each adjacent pulse can keep a certain size, and its time gap than the measurement pulse adjacent with this synchronizing pulse that occurs in the synchronizing pulse according to the location detecting apparatus of DE 19903645 A1 is much bigger.
Therefore, can be according to location detecting apparatus of the present invention with realizing than the simple hardware and software of the hardware and software that under the situation of DE 19903645 A1, needs.
In one embodiment of the invention, be chosen in the different sequence of time gap between every pair of continuous impulse of each pulse train, so that make between the non-adjacent pulse of pulse train, for example, pulse train the first and the 3rd, second and the 5th, the 3rd and the 6th or first and the 5th, second and the 6th, the 3rd and the 7th etc. between, the time gap difference, and the time gap between the pulse of the pulse train of the specific right non-adjacent pulse of each of pulse train is also inequality.Its favourable part is, even owing to disturb and make the partial pulse of pulse train can't be used for position probing, and still can the transmission pulsion phase with relevant be corresponding respectively exactly in other pulse of receiver side.Therefore, in this case, can guarantee that also the signal propagation time between the position of the instantaneous position of signal generator and signal receiver is carried out failure-free to be calculated.
In one embodiment of the invention, by aud. snl., be specially ultrasonic signal, constitute described signal,, be specially metal track, mfg. metal cord or plain conductor by sound conductor, constitute described signal transmission medium, constitute described signal generator by audio signal generator, constitute described signal receiver, and constitute described signal propagation time measurement mechanism by the sound transmission time measurement device by the aud. snl. receptor.But, for realizing purpose of the present invention, can also use other signal transmission mediums, for example, can transmit fiber waveguide, electric waveguide or a. g. of acoustic impluse, light pulse or wave packet by it.
In one embodiment of the invention, end in tracks provides an independent signal receiver, the corresponding instantaneous position of movable object is determined according to the signal propagation time between signal generator and the signal receiver, as the distance of movable object to an end of the tracks at independent signal receiver place.
In another embodiment, respectively provide a signal receiver, with respect to an end of tracks and the instantaneous position of the other end, determined signal propagation time according to movable object at each end of tracks.In this manner, the instantaneous position of movable object not only can be determined, and the length overall of the tracks between two signal receivers can be determined.When the length overall that certain moment is determined is compared with the length overall of determining in the past, can find in tracks, whether to occur variation therebetween, for example, the variation that causes owing to temperature fluctuation.Not only the variation that causes owing to temperature fluctuation is discerned with regard to providing like this, and according to the reference value that is stored in tracks length to its possibility that compensates.
In one embodiment of the invention, the received signal that receives at two signal receivers offers a public processing equipment, as described in according to EP 0694792 A1, and in described processing equipment, form the difference between the moment that two signal receivers send described received signal.According to this time difference, can calculate the instantaneous position of movable object.Time difference between two received signals is the centre that the null representation movable object just in time is positioned at the position of two signal receivers.Be not equal in the time difference under zero the situation,, determine that movable object is between the centre of tracks and one or another signal receiver according to the symbol of time difference.
In another embodiment of the present invention, each signal receiver has a signal propagation time measurement mechanism related with it, by this signal propagation time measurement mechanism, being independent of under the situation of signal propagation time that received signal arrives another signal receiver, determine that received signal arrives the signal propagation time of a signal receiver in two signal receivers.For this reason, except providing the received signal, the transmission signal of signal generator is provided also directly for two signal propagation time measurement mechanisms by relevant respectively signal receiver.By two signals that are provided to the there are compared, each signal propagation time measurement mechanism can be determined thus by the signal propagation time of signal transmission medium from the instantaneous position of signal generator to the position of coherent signal receptor.
Description of drawings
Fig. 1 shows the elevator device embodiment that comprises according to location detecting apparatus of the present invention;
Fig. 2 shows the embodiment according to arythmia pulse train of the present invention;
Fig. 3 shows the block diagram of the device that is used to detect the pulse recognition number;
Fig. 4 illustrates two pulses (a) and the clock pulse sequence (b) of pulse train of the present invention.
The specific embodiment
Below explanation and embodiments of the invention shown in Figure 1 relate to and be used for elevator device, promptly be used to detect the position of the elevator cage 12 that can move along elevator rail, location detecting apparatus.What extend along the elevator rail that is arranged in access to elevators is the signal transmission medium of sound conductor 13 forms, preferably metal track, mfg. metal cord or plain conductor.But the sound conductor of the other materials except metal also is fit to, as the sound conductor of hard plastic material.Sound conductor 13 extends to the upper end from the lower end of access to elevators.
Being arranged on the elevator cage 12 is the signal generator 15 that can move with elevator cage 12, be included in the signal generator side be used to generate the electrical transmission pulse signal generating apparatus and the signal generator next door to be used for the electrical transmission pulses switch be the signal converter of acoustic impluse.This signal converter is for moving and the signal coupler 17 that is suitable for acoustic impluse is coupled to sound conductor 13 provides signal along sound conductor 13.From the particular location of signal coupler 17, acoustic impluse advances to the upper end 19 and the lower end 21 of sound conductor 13 with sound conductor 13 intrinsic speed of sound, and these are illustrated by up acoustic impluse 23 among Fig. 1 and descending acoustic impluse 25.
In the zone of the upper end 19 of sound conductor 13, a upper signal extraction apparatus 27 is provided, be used for and offer upper signal receptor 29 by the acoustic impluse 23 that upper signal extraction apparatus 27 is coupled out or extracts, utilize upper signal receptor 29 that the acoustic impluse 23 that extracts is converted to electric received pulse.In the zone of the lower end 21 of sound conductor 13, a bottom dector 31 is provided, utilize bottom dector 31 from sound conductor 13, to extract descending acoustic impluse 25.Bottom dector 31 provides signal to bottom signal receiver 22, and the acoustic impluse that utilizes this bottom signal receiver 22 to extract from sound conductor 13 is converted to electric received pulse.In firm mode two dectors 27 and 31 are installed, that is, they can not be moved with respect to sound conductor 13.
Upper signal receptor 29 and bottom signal receiver 33 offer its received pulse upper signal interval travel time measurement mechanism 35 and bottom signal propagation time measurement mechanism 37 respectively.By electric wire 39 two signal propagation time measurement mechanisms 35 are connected with the signal generating apparatus of signal generator 15 with 37, and will offer electric wire 39 by the electrical transmission pulse that signal generating apparatus generates, by electric wire 39 these pulses are transported to signal propagation time measurement mechanism 35 and 37 from its feed-in place, this is illustrated by the electrical transmission pulse 41 of the sensing upper signal interval travel time measurement mechanism 35 among Fig. 1 and the electric pulse 43 of sensing bottom signal propagation time measurement mechanism 37.
Because during elevator cage 12 moved along access to elevators, signal generator 15 moved with respect to electric wire 39, so feed position is along with elevator cage moves together.For this reason, according to known mode itself, embodiments of the invention have utilized the suspension cable of suspending elevator cage 12 from the suspension point the zone of upper channel end in midair.
Two signal propagation time measurement mechanisms 35 and 37 signal propagation times of determining are offered processing equipment 45, by the instantaneous position of these processing equipment 45 detection signal producers 15 and the instantaneous position of elevator cage 12.The signal propagation time that provides according to signal propagation time measurement mechanism 35, processing equipment 45 is determined the instantaneous distance of elevator cage 12 to upper signal extraction apparatus 27, according to the signal propagation time that signal propagation time measurement mechanism 37 provides, processing equipment 45 calculates the instantaneous distance of elevator cage 12 to bottom dector 31.The instantaneous position of the elevator cage of being determined by processing equipment 45 12 is transported to electric life controller 47, electric life controller 47 concrete control elevator cages 12 moving and stopping and the unlatching of elevator door (not shown).
Because determine acoustic coupler 17 independently of one another to the instantaneous distance of upper signal extraction apparatus 27 with to the instantaneous distance of bottom dector 31 by means of two signal propagation time measurement mechanisms 35 and 37, processing equipment 45 can also calculate the total distance between two dectors 27 and 31.Compare with the value of storage by the total distance between two dectors 27 and 31 that are stored in that certain time determines and by the value of this total distance that will determine afterwards, can change detected, for example, owing to the variation that temperature fluctuation causes, this provides the aforesaid possibility that the temperature effect of determined corresponding elevator cage position is compensated.
Owing to determine the instantaneous position of acoustic coupler 17 and two distances between sound extraction apparatus 29 and 31 independently of one another, therefore redundancy also is provided, safer under interference and failure condition.Up acoustic impluse 23 or descending acoustic impluse 25 are being carried out under the situation of signal propagation time measurement failure, remaining signal propagation time observed reading still can be determined the instantaneous position of elevator cage 12, be clipped to the distance of dector 27 or 31 as branch, still can estimate the extraction signal of dector 27 or 31.
It is corresponding with the relevant respectively transmission pulse in the signal generator side with each received pulse of 33 to illustrate how the present invention guarantees to distinguish arriving signal receptor 29 exactly by Fig. 2 below, although the time gap between pulse continuous time of pulse train is less than the signal propagation time between two dectors 29 and 31.
Fig. 2 shows and utilizes embodiments of the invention, has the pulse train of 11 pulses of identification number 1 to 11, and described pulse train is to repeat in the cycle with 33 milliseconds.For example, the pulse train in the cycle length that designed to be used the tracks of elevator cage 12 is 130 meters elevator device like this.Suppose that the sound transmission time in metal sound conductor 13 is 100 meters per 20 milliseconds, then the cycle is that should to be suitable for extreme length be 160 meters tracks for 33 milliseconds pulse train.
Fig. 2 is that unit shows time gap or the gap length between per two adjacent pulses with the millisecond.According to the present invention, for every pair of pulse train continuous signal impulse, the time gap between the continuous signal pulse is different.Under the situation of pulse train shown in Figure 2, adjacent pulse length does not at interval occur twice.Therefore, by its time gap, defined each in 11 pulses of pulse train exactly with respect to specific previous pulse.
Because periodically the cycle of the signal impulse sequence that repeats is to select like this, be its maximum acoustic interval travel time, so sound conductor 13 can always only transmit the acoustic impluse that belongs to same pulse train greater than appearance between two dectors 27 and 31.Therefore, two pulses identical with the time gap of fwd pulse appear on sound conductor 13 never.
Two signal propagation time measurement mechanisms 35 and 37 all are equipped with and are used for determining the device of the pulse recognition number of each received pulse by the received pulse determining according to the time just to have arrived and the time gap between the previous received pulse.For this reason, all be equipped with pulse recognition number can for two signal propagation time measurement mechanisms 35 and 37 and determine device with structure shown in Figure 3.This pulse recognition number determine device comprise counting machine 49, wherein store at least one electrical form memory device 51 and with circuit A3, and may comprise delay unit τ according to wiring shown in Figure 3.Counting machine 49 has the first input end that is designated as the counting beginning, second input end and the RESET input that is designated as the clock input.What be added in counting beginning input end is the electric signal pulse that is provided by signal receiver 29 and 31 respectively.Input end of clock is connected to clock generator, is counted by the clock pulse of 49 pairs of clock generators of counting machine.Counting machine 49 also comprises a mouth, be used for and circuit A3 from each count value that reaches of this mouth, by first input end give provide the count value of counting machine 49 with circuit A3 and by second input end to providing signal impulse with circuit A3.Offer memory device 51 with the output signal of circuit A3 as incoming signal.The pulse recognition number of the received pulse of Dao Daing works at the mouth of memory device 51 at last.
Fig. 4 a shows two pulses in the pulse train shown in figure 2, and Fig. 4 b shows clock pulse.
The operational mode of circuit structure shown in Figure 3 below will be described.
When utilizing conventional circuit component, generally its intrinsic delay is just enough.Otherwise, can be added on the delay unit that is shown in broken lines among Fig. 3.
In one embodiment of the invention, utilize microcontroller to carry out time of run and measure, its software is programmed,, that is, at first read count value, then counting machine 49 is resetted so that sequence is controlled according to aforesaid rhythm.In this case, with circuit A3 and delay unit τ not necessarily.
Electrical form of storage in the memory device 51, this form is mapped each spacing value of the pulse train among corresponding pulse recognition number and Fig. 2, accurately is identified in the last received received pulse in the concrete pulse train thus.Thus can be exactly respectively in relevant received pulse and the electric pulse 41 and 43 that receives respectively in signal propagation time measurement mechanism 35 and 37 any one be mapped, and measures the accurate interval travel time of each received pulse.
Judgement to the pulse recognition number of electrical transmission pulse 41 and 43 in signal propagation time measurement mechanism 35 and 37 can utilize the circuit corresponding to Fig. 3 to carry out.
According to already mentioned embodiment of the present invention, if be chosen in the different sequence of time gap between the continuous impulse of pulse train, it is right for each specific pulse to make, the non-adjacent pulse of pulse train between the time gap difference, then not only when all pulses of each pulse train respectively arriving signal receptor 29 can guarantee with 33 the time each received pulse is mapped with relevant transmission pulse, and when only the pulse of some pulse train arrives corresponding signal receiver 29 and 33 respectively, also can guarantee each received pulse is mapped with relevant transmission pulse.These can utilize following explanation of tables, for example, form shows the time gap between each adjacent pulse of the pulse train with interruption, in having the pulse train of interruption and between two pulses of interpulse phase failure neighbour for every a pulse, every 3 pulses, every 5 pulses with every 8 pulses.
Have in pulse train under the situation of interruption, the time gap between each adjacent pulse is:
Every a pulse: every three pulses:
Time gap between the time gap pulse between the pulse
1 and 3 6.6 millisecond 1 and 5 12.7 millisecond
2 and 4 5.8 milliseconds 2 and 6 12.2 milliseconds
3 and 5 6.1 milliseconds 3 and 7 11.7 milliseconds
4 and 6 6.4 milliseconds 4 and 8 12.3 milliseconds
5 and 7 5.6 milliseconds 5 and 9 11.8 milliseconds
6 and 8 5.9 milliseconds 6 and 10 11.3 milliseconds
7 and 9 6.2 milliseconds 7 and 12 11.9 milliseconds
8 and 10 5.4 milliseconds 8 and 1 11.4 milliseconds
9 and 12 5.7 milliseconds
10 and 1 6.0 milliseconds
Every five pulses: every eight pulses:
Time gap between the time gap pulse between the pulse
1 and 7 18.3 millisecond 1 and 10 27 millisecond
2 and 8 18.1 milliseconds 2 and 12 26.7 milliseconds
3 and 9 17.9 milliseconds 3 and 1 26.8 milliseconds
4 and 10 17.7 milliseconds
5 and 12 17.5 milliseconds
6 and 1 17.3 milliseconds
This explanation of tables for each pulse position, the time gap difference between the adjacent pulse that has removed several pulses.Even have only the partial pulse sequence to arrive corresponding signal receiver 29 and 33 respectively, also can judge exactly the received pulse that has just received relates to which pulse of this pulse recognition number with pulse train according to this length with pulse spacing between two continuous impulses of pulse train at interval.
In order can be exactly the received pulse of the pulse train that receives only to be mapped with interruption, pulse recognition number shown in Figure 3 determines that the embodiment of device not only comprises all pulse spacings between each pulses of the whole pulse trains in the electrical form that is stored in memory device 51, and comprise a pulse of interruption that is used to receive pulse train all at interval, all intervals of the pulse train of two pulses of interruption that are used to receive, all intervals of the pulse train of three pulses of interruption that are used to receive etc.Along pulse train all possible each pulse interruption is carried out such processing.
If electronic memory 51 receive from the count value of circuit A3, then in this count value and the electrical form that is stored in memory device 51 all are compared at interval.If for example count value is corresponding to pulse spacing of 3.3 milliseconds, then this is the 8th pulse that does not have the pulse train of being interrupted certainly.If corresponding to for example 11.8 milliseconds pulse spacing, then comprising certainly, count value wherein removed the 6th, 7,8 the 9th pulse of feeling the pulse the sequence with interruption of dashing.If corresponding to for example 26.7 milliseconds pulse spacing, then comprising certainly, count value wherein removed the 3rd to the 10th the 11st pulse of feeling the pulse the pulse train with interruption of dashing.
By using according to pulse train of the present invention, under the situation that does not need the appended synchronization pulse, even the fraction pulse that guarantees only to have pulse train is arriving signal receptor 29 and 33 respectively, also each received pulse can be mapped with relevant transmission pulse.
The various influence factors that porch is more or less flattened of plaing a part are arranged.For this reason, in the process of measuring the time gap between the continuous impulse, must consider certain tolerance.Enough reliable synchronously between the pulse that guarantees to receive and the relevant transmission pulse is provided with the tolerance limits that helps the pulse spacing measurement.In example shown in Figure 2, this tolerance is fixed, and for example, in order still can to discern the interval of concrete definition, and the deviation of the time gap that defines between two concrete pulses of pulse train must be no more than or less than 10 microseconds.
Repeat at signal receiver 29 and/or 33 under the situation of old signal content, use different gap lengths that the possibility of definite nonconformity performance is provided.Between each adjacent pulse each is the part of signal content at interval, and pulse train according to the rules, system have defined the expectation value of the dynamic change of gap length.If the gap length of expectation value and measurement is inconsistent, then assert the performance inconsistency lattice of system.If be the pulse that does not have the pulse of the pulse train of being interrupted or the pulse train of interruption is arranged, can determine the gap length of the expection between two continuous impulses by means of being stored in form in the memory device 51.
If the pulse of partial reflection between the regular pulses of pulse train, occurs disturbing and having, wherein, reflection may be because that the signal attenuation parts at the two ends of sound conductor 13 are improper or fault causes or owing to cause as the plain conductor bending of sound conductor 13, the systematic measurement error of a pulse of pulse train then occurs only influencing.Can reduce the influence of this interference by filtering, and can observe it for diagnotic purpose.
According to method of measurement of the present invention to the susceptibility of periodicity noise signal less than the routine measurement method.
The track of advancing that pulse train shown in Fig. 2 designed to be used elevator cage is 130 meters a elevator device.33 milliseconds period of pulse train is greater than as the maximum acoustic interval travel time in the lead of sound conductor 13, is that the maximum acoustic interval travel time is 29 milliseconds under 130 meters the situation in length.Owing to two pulses of identical pulse identification number on the lead of sound conductor, can not occur having, therefore guarantee exactly received signal and transmission signals to be mapped.
Being used for process of the present invention, do not need synchronizing pulse according to pulse train of the present invention.Under according to situation of the present invention, the function of the synchronizing pulse in the routine measurement method, being about to each (have identical pulse at interval) pulse has been substituted with the function that the associated transport pulse is mapped respectively, this be utilized and the time gap of previous pulse can discern exactly corresponding pulse train each pulse and since the cycle of pulse train greater than the sound transmission time between the sound conductor two ends, thereby in a pulse that on sound conductor, can only occur same pulse train sometime.
Pulse train at the example shown in Fig. 2 is optimized to such degree, removing under the situation of two pulses between the received pulse continuously arbitrarily of pulse train, for the possible discontinuity position of the institute of pulse train, the spacing distance that is interrupted the place will change in 8.5 milliseconds 9.5 milliseconds scope.Such pulse spacing is consistent with the cycle of run of the software that the elevator device with the position detecting device that utilizes aud. snl. interval travel time measurement mechanism is used always.
Have following advantage according to pulse train of the present invention:
With compare according to the pulse train of DE 1903645 A1, improved the resistibility of the interference that causes conflicting mutually owing to the acoustic impluse and the reflection of these acoustic impluses according to pulse train of the present invention, this is by determining that each the different gap length between continuous impulse realizes.
With compare according to the method for detecting position of EP 0694792605 A1 owing to make quantizing error etc. evenly, therefore improved immunity to a distrubance to disturbing according to method for detecting position of the present invention.In addition, compare with known method for detecting position, because closeer continuous gauging operation in time, therefore the multiplicity of the single measurement operation that comprises according to method for detecting position of the present invention is less.
With compare according to the method for detecting position of DE 19903645 A1 owing to do not need at first to wait for synchronizing pulse, therefore, according to method for detecting position of the present invention provide faster between received pulse and transmission pulse synchronously.Utilize observed reading quickly than under the situation of known method according to method of the present invention.
Because under the situation of the corresponding position measurements that is independent of elevator cage, defined foresight well to each pulse spacing, therefore, be more suitable in the Secure Application relevant than known method for detecting position according to method for detecting position of the present invention with elevator device.
For periodic noise signal, lower according to method of measurement susceptibility of the present invention.Compare with EP 0694792 A1,, therefore, provide redundancy according to method of the present invention because measuring speed is higher.Under the situation that impact position is not measured, can resist the influence of arythmia interference.
Although the present invention is illustrated and describes according to exemplary embodiments,, it should be appreciated by those skilled in the art that under the situation that does not break away from the spirit and scope of the present invention, can carry out aforesaid and other change, omission and interpolation to the present invention.
Claims (12)
1. location detecting apparatus is used to detect the position of the target (12) that can move along predetermined tracks, and this equipment comprises:
A signal transmission medium (13) that extends along described tracks;
A signal generator (15), can be along with described movable object (12) moves together, utilize this signal generator, can couple a signal in the described signal transmission medium (13) at the coupling position that changes along with the motion of described signal generator (15);
At least one signal receiver (29,33) at the extracting position of the end of described tracks utilizes this signal receiver can extract described signal from described signal transmission medium (13);
A signal propagation time measurement mechanism (35,37) is adapted to pass through the signal that extracts at described extracting position is estimated, determines the signal propagation time between coupling position and extracting position; And
A processing equipment (45) is suitable for according to determined signal propagation time, and induced representation is along the position signal of target (12) instantaneous position of described tracks;
Wherein, described signal generator (15) is designed to transmit the signal impulse sequence (Fig. 2) that periodically repeats, in this pulse train, for every pair of continuous signal pulse, time gap difference between the continuous signal pulse, the cycle of the signal impulse sequence that repeats is greater than the peak signal interval travel time under the situation that ultimate range is arranged between coupling position and the extracting position, and the time gap between the continuous signal pulse is less than this peak signal interval travel time.
2. location detecting apparatus as claimed in claim 1, wherein, constitute described signal by aud. snl., constitute described signal transmission medium (13) by sound conductor, constitute described signal generator (15) by audio signal generator, constitute described signal receiver (29,33) by the aud. snl. receptor, and constitute described signal propagation time measurement mechanism (35,37) by the sound transmission time measurement device.
3. location detecting apparatus as claimed in claim 2, wherein, described audio signal generator comprises: a signal generating apparatus is used for producing electric pulse (41,43) in described signal generator one side; A signal converter in described signal generator one side, is used for this electric pulse is converted to acoustic impluse (23,25); And a signal coupler, be used for described acoustic impluse is coupled to described sound conductor.
4. location detecting apparatus as claimed in claim 3, wherein, described aud. snl. receptor comprises: a dector is used for extracting described acoustic impluse (23,25) from described sound conductor; And a signal repeater, be used for described acoustic impluse being converted to electric pulse in described receptor one side.
5. location detecting apparatus as claimed in claim 4, wherein, described sound transmission time measurement device is coupled to described signal generator (15) and is coupled to described signal receiver (29 in described receptor one side, 33), and utilization is at the electric pulse (41 of described signal generator one side, 43) with at the electric pulse of receptor one side, determine signal propagation time.
6. location detecting apparatus as claimed in claim 5, wherein, two end points (19 in described tracks, in the zone of each end points 21), provide one to have signal receiver (29,33) and a signal propagation time measurement mechanism (35,37) extracting position, utilize them can determine signal propagation time between coupling position and corresponding extracting position, wherein, described processing equipment (45) is designed to determine the instantaneous position of described movable object (12) according to determined signal propagation time.
7. location detecting apparatus as claimed in claim 6, wherein, each pulse of described signal impulse sequence (Fig. 2) all has the independent pulse recognition number (1 to 11) of distributing to it, and at least one signal receiver (29,33) comprise that a pulse recognition number determines device (Fig. 3), be used to determine the identification number (1 to 11) of the corresponding signal impulse that extracts at extracting position, described pulse recognition number determines that device is designed to determine the corresponding signal impulse of extraction and the time gap between the former corresponding signal impulse that extracts, and, give the pulse recognition number for the corresponding signal impulse that extracts according to determined time gap.
8. location detecting apparatus as claimed in claim 7 comprises a signal generator (15) that ultrasonic signal is provided.
9. location detecting apparatus as claimed in claim 7 comprises an elevator cage as movable object (12).
10. location detecting apparatus as claimed in claim 7 comprises the sound conductor of a metal track form.
11. location detecting apparatus as claimed in claim 7 comprises the sound conductor of a mfg. metal cord form.
12. location detecting apparatus as claimed in claim 7 comprises the sound conductor of a plain conductor form.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10156043.5 | 2001-11-15 | ||
| DE2001156043 DE10156043B4 (en) | 2001-11-15 | 2001-11-15 | Position-determining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1692068A true CN1692068A (en) | 2005-11-02 |
| CN100528725C CN100528725C (en) | 2009-08-19 |
Family
ID=7705796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02822843XA Expired - Fee Related CN100528725C (en) | 2001-11-15 | 2002-10-15 | Position detection equipment |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4399264B2 (en) |
| CN (1) | CN100528725C (en) |
| DE (1) | DE10156043B4 (en) |
| HK (1) | HK1083093A1 (en) |
| WO (1) | WO2003043920A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100257B (en) * | 2006-07-07 | 2010-06-02 | 株式会社日立制作所 | Multi-car elevator |
| CN108474843A (en) * | 2016-01-29 | 2018-08-31 | 松下知识产权经营株式会社 | Distance-measuring device |
| CN110869303A (en) * | 2017-06-27 | 2020-03-06 | 通力股份公司 | Method and apparatus for configuring wireless devices in an elevator system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012169042A1 (en) * | 2011-06-09 | 2012-12-13 | 三菱電機株式会社 | Elevator device |
| CN112061909B (en) * | 2020-09-23 | 2023-03-17 | 森思泰克河北科技有限公司 | Elevator control system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4426793C1 (en) * | 1994-07-28 | 1995-10-26 | Schmersal K A Gmbh & Co | Position measurement appts. for e.g. elevator or lift shaft |
| US5883345A (en) * | 1997-12-23 | 1999-03-16 | Otis Elevator Company | Sonic position measurement system |
| DE19903644C1 (en) * | 1999-01-29 | 2000-07-06 | Schmersal K A Gmbh & Co | Position detection arrangement has sound signal line extending along measurement path, derives position correction value from calibration signal distance and transition time |
| DE19903645C2 (en) * | 1999-01-29 | 2002-07-18 | Schmersal K A Gmbh & Co | Position detection device |
| DE19903643A1 (en) * | 1999-01-29 | 2000-08-24 | Schmersal K A Gmbh & Co | Position detection device |
-
2001
- 2001-11-15 DE DE2001156043 patent/DE10156043B4/en not_active Expired - Fee Related
-
2002
- 2002-10-15 JP JP2003545567A patent/JP4399264B2/en not_active Expired - Fee Related
- 2002-10-15 CN CNB02822843XA patent/CN100528725C/en not_active Expired - Fee Related
- 2002-10-15 WO PCT/US2002/032907 patent/WO2003043920A1/en active Application Filing
-
2006
- 2006-03-10 HK HK06103099.8A patent/HK1083093A1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100257B (en) * | 2006-07-07 | 2010-06-02 | 株式会社日立制作所 | Multi-car elevator |
| CN108474843A (en) * | 2016-01-29 | 2018-08-31 | 松下知识产权经营株式会社 | Distance-measuring device |
| CN110869303A (en) * | 2017-06-27 | 2020-03-06 | 通力股份公司 | Method and apparatus for configuring wireless devices in an elevator system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10156043A1 (en) | 2003-06-05 |
| JP4399264B2 (en) | 2010-01-13 |
| CN100528725C (en) | 2009-08-19 |
| WO2003043920A1 (en) | 2003-05-30 |
| JP2005509867A (en) | 2005-04-14 |
| DE10156043B4 (en) | 2006-03-02 |
| HK1083093A1 (en) | 2006-06-23 |
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