CN1323922C - Elevator cabin monitor and method thereof and mounting method for such monitor - Google Patents
Elevator cabin monitor and method thereof and mounting method for such monitor Download PDFInfo
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- CN1323922C CN1323922C CNB2003101044085A CN200310104408A CN1323922C CN 1323922 C CN1323922 C CN 1323922C CN B2003101044085 A CNB2003101044085 A CN B2003101044085A CN 200310104408 A CN200310104408 A CN 200310104408A CN 1323922 C CN1323922 C CN 1323922C
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- lift car
- communicator
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- communicate
- monitor unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0012—Devices monitoring the users of the elevator system
Abstract
Provided is an elevator car monitoring device capable of stably transmitting images of the inside of an elevator car and maintenance data (running data) by using existing tail codes even if an elevator inverter is operated for running the elevator car. This elevator car monitoring device performs communication by allocating transmission data to carrier signals by using a plurality of carrier signals. S/N (ratio of signal to noise) is estimated for the carrier signals. According to the estimated S/N value, communication devices 5a and 5b performing communication by changing the allocated amount of the transmission data to the carriers are installed in and on the outside the elevator car 1 for communication between both communication devices by using, as communication lines, strands built in a tail cord 7.
Description
Technical field
The present invention relates to a kind of image and the service data in the car (running data) that can effectively the employing pick up camera be taken the state in the lift car and be sent to the outer lift car monitor unit of car.
Background technology
In recent years, along with the high stratification of building, the elevator of various buildings is required the High Level of comfort feature, safety and operating maintenance.Particularly, at secure context, monitor that externally the system of the image in the lift car is very general.Again, in service at elevator, according to the viewpoint that improves maintenance efficiency, wish to have the system of its motoring condition of energy distant surveillance.For the image monitoring in such lift car, following system (for example referring to patent documentation 1) is arranged as prior art.In patent documentation 1, disclose, adopt multiple twin that line is passed through this multiple twin to line as trailing cable, the picture signal that the pick up camera that is arranged in the car is taken sends the control setup of Machine Room to, further adopts coaxial cable to send the technology of the monitoring room of centralized management to from control setup this picture signal.Also can utilize coaxial cable to substitute above-mentioned multiple twin to line.For the distant surveillance of above-mentioned elevator, following system (for example referring to patent documentation 2) is arranged as prior art again.In patent documentation 2, disclose, vibration during by the operation that acceleration pick-up detected that is arranged in the lift car, it is service data (running data) sends elevator to by trailing cable control panel, send servicing center to by telephone wire then, the technology of service data (running data) being resolved at servicing center.
[patent documentation 1]
The spy opens 2002-173273 communique (paragraph 0012～0023)
[patent documentation 2]
The spy opens 2001-341956 communique (paragraph 0016～0029)
Summary of the invention
(problem that invention will solve)
But, in above-mentioned arbitrary prior art, all be to send information (data) to Machine Room (place of control panel or control setup is set) from lift car.At this moment, between Machine Room and elevator, trailing cable is set, communicates, and present situation is that trailing cable is not discussed on utilizing especially with this.Trailing cable generally just is made of many twisted wires (not having multiple twin), multiple twin is not packed in the trailing cable to line or coaxial cable.For this reason, need lay the multiple twin different,, new technology occur as new trailing cable to line or coaxial cable with the trailing cable that constitutes by many twisted wires.Again, as other method, need remanufacturing with multiple twin to line or coaxial cable and many twisted wires and special trailing cable together.
If can realize directly utilizing the trailing cable that constitutes by many twisted wires to send information from lift car, then do not need new cable installatition operation, can be easily and construct the system that between lift car and Machine Room, can communicate at short notice.Again, not to multiple twin to line like that with 2 twisted wire multiple twins.Therefore, from noise proof viewpoint, be very weak cable.Constituting these many twisted wires of trailing cable, is the structure that is subjected to the high-frequency electromagnetic The noise especially easily.
The image in the lift car and the transmission of service data (running data), the state in lift car travels carries out.Nearest elevator in order to improve rideability and comfortable travelling, has adopted inverter.Owing to constitute the opening of on-off element (for example IGBT, thyristors such as bipolar transistor, FET, silicon control) of inverter, disconnected action, produce electromagnetic noise.This electromagnetic noise, the on-off element conducting or by the time, be the definite high frequency noise of switching speed of the inductance, distributed capacitance and the on-off element that form by the wiring in the circuit.The result of this frequency of Huo Deing shows by experiment, to tens of MHz, reaches hundreds of MHz at hundreds of KHz sometimes.Further, in order to carry out the speed control of lift car, the frequency of electric moter voltage is variable, can produce electromagnetic noise below tens of KHz by the first-harmonic of this frequency and high order harmonic.Its result shows, lift car electromagnetic noise in motion, and its main body is below number MHz.
A part that is contained in many twisted wires in the trailing cable is the signal wire (SW) that is used for lift car control, is connected with control setup.Therefore, transmit usefulness as monitoring picture and service data, if adopt other twisted wire in the same trailing cable of packing into, these lines also will be configured in inverter and control setup thereof and elevator drive with near the power line of motor.When elevator travels, in order to carry out the ride control of lift car, the inverter action, the above-mentioned electromagnetic noise that inverter produces, be induced to the signal wire (SW) of the control that is used for lift car, overlapping electromagnetic noise on this signal wire (SW) can further be induced to twisted wire and the service data that image in the same trailing cable of packing into transmits usefulness and transmit on the twisted wire of usefulness, perhaps directly transmit on the twisted wire of usefulness from twisted wire and the service data that inverter is induced to image transmission usefulness by the space, further, overlapping elevator drive transmits on the twisted wire of usefulness with twisted wire and the service data that the electromagnetic noise from inverter on the power line of motor also can be induced to image transmission usefulness.Its result, if adopt a part of line of many twisted wires that constitute trailing cable to transmit lift car interior image and service data (running data), lift car is under motoring condition, because above-mentioned electromagnetic noise, can make communication disruption, perhaps have more existing transmission error code, the problem that appearance can not fully communicate.
For this reason, even the object of the present invention is to provide a kind of inverter for elevator action that allows lift car travel, also can adopt a part of line stabilization of many twisted wires that constitute trailing cable to transmit lift car interior image and service data (running data) in real time, can monitor lift car monitor unit and method thereof in the elevator.
(solving the means of problem)
In order to solve above-mentioned problem, the invention provides a kind of lift car monitor unit, monitor monitoring picture and service data in the lift car, in lift car and elevating road or Machine Room, communicator is set, adopt the twisted wire that is encased in the trailing cable to connect two communicators, communicator with twisted wire as order wire, adopt a plurality of carrier signals and each carrier signal distributed and transmit data and communicate, perhaps adopt to expand to the spread spectrum communication mode that wideer frequency band communicates and communicate.
These communicators are adopting a plurality of carrier signals (being also referred to as multicarrier) then, and when communicating after each carrier signal is distributed the transmission data, according to S/N (ratio of signal and the noise) value of each carrier signal, change communicates after transmitting the data allocations amount.Again, each carrier signal evaluation is transmitted the bit error ratio, according to the bit error ratio of being estimated, change communicates after transmitting the data allocations amount.Further, adopt OFDM (orthogonal frequency is multiple to be cut apart) mode to communicate on the basis of the above.Again, these communicators have judged whether to obtain the S/N of the ratio of predetermined noise to carrier signal, when judged result when predetermined S/N is following, with the frequency of carrier signal be altered to predetermined different frequency after communicate.
Again, the lift car monitor unit, the interphone bonded assembly interphone line that two communicators are adopted and are arranged in the car communicates.
Then, in the communication between above-mentioned two communicators, the monitoring picture in the lift car and service data (running data) can be sent to outside the lift car in real time from lift car and monitor.
According to the present invention, by by the communication in the high frequency band of communication, the S/N of the high carrier signal of S/N, adopt and expand to the communication that spread spectrum communication that the frequency band wideer than communication band communicate has improved S/N,, the inverter for elevator that allows lift car travel produces noise even moving, can can not be subjected under the situation of its big influence, adopt the stable monitoring picture and the service data of implementing to transmit in the lift car (running data) of a part of many twisted wires that constitute trailing cable.There is no need to lay the cable installatition operation of the new traffic line that is used to transmit again.And, monitoring picture in the lift car and service data can be used for distant surveillances such as safety and motoring condition.
The invention provides a kind of lift car method for monitoring, monitor monitoring picture and service data in the lift car, in lift car and elevating road or Machine Room, communicator is set, adopt the twisted wire that is encased in the trailing cable to connect two communicators, with twisted wire as order wire, adopt a plurality of carrier signals and each carrier signal is distributed the transmission data, perhaps adopt and expand to the spread spectrum communication mode that wideer frequency band communicates, can implement the monitoring picture and the service data that transmit, monitor that lift car is interior.
The present invention also provides a kind of installation method of lift car monitor unit, and the interior monitoring picture of supervision lift car and the lift car monitor unit of service data are installed.In lift car and elevating road or Machine Room, communicator is set, two communicators are adopted twisted wire or the interphone wire joint that is encased in the trailing cable, with twisted wire or interphone line as order wire, communicator adopts a plurality of carrier signals and each carrier signal is distributed and transmits data and communicate, and perhaps adopts to expand to the spread spectrum communication mode that wideer frequency band communicates and communicate.
Description of drawings
Fig. 1 represents the instruction diagram of the present invention's the 1st embodiment.
Fig. 2 represents the summary pie graph of trailing cable.
Fig. 3 is the instruction diagram of communication characteristic.
Fig. 4 is the spectrogram of the general multichannel carrier of explanation.
Fig. 5 is the spectrogram of explanation OFDM.
Fig. 6 is the figure of the communication bit error performance under the explanation Gaussian noise.
Fig. 7 represents that certain hour estimates the processing flow chart of S/N at interval.
Fig. 8 represents the instruction diagram of transformat.
Fig. 9 represents the instruction diagram of the signal location configuration of QPSK.
Figure 10 represents the S/N evaluation map of QPSK.
The processing flow chart that the S/N that Figure 11 presentation of events drives estimates.
Figure 12 has represented to adopt the instruction diagram of the embodiment of spread spectrum communication mode
Figure 13 represents the instruction diagram of the present invention's the 2nd embodiment (utilizing the communication of interphone).
Figure 14 represents the configuration example of frequency divider 80a.
Figure 15 is illustrated in the figure that is provided with of communicator in the elevator.
Nomenclature
The 1-lift car; The 2-pick up camera; The 3-data acquisition unit; The 4-interphone; 5a, 5b-communicator; 6-interphone device; The 7-trailing cable; 72-interphone line; 80a, 80b-frequency divider; The 9-server; 11-administrative center; The 12-image storage server; The 13-servicing center; The 100-Machine Room; The 200-elevating road; The 300-building; Space in the 310-building.
The specific embodiment
Below the embodiment that present invention will be described in detail with reference to the accompanying.In addition, embodiments of the present invention, roughly be divided into the 2nd embodiment that the 1st embodiment of the lift car monitor unit that a part that (1) utilize the twisted wire of trailing cable communicates in the multichannel carrier mode and (2) utilize the lift car monitor unit that interphone communicates, describe.
(the 1st embodiment)
The 1st embodiment of the lift car monitor unit that a part that describes the twisted wire utilize trailing cable with reference to accompanying drawing in detail communicates in the multichannel carrier mode.Fig. 1 represents the pie graph of the lift car monitor unit of the 1st embodiment.Pick up camera 2 is set in lift car 1, can monitors the situation in the lift car 1.Pick up camera 2 has wide-angle lens, can take the whole zone in the lift car 1.Between pick up camera 2 and communicator 5b, adopt special-purpose cable, for example ether (R) cable or coaxial cable to connect.When adopting ether (R) cable, for example that works connects ether (R) cable to the website pick up camera for pick up camera 2.Picture signal in the lift car that pick up camera 2 is taken is to communicator 5b output, and further, communicator 5b and data acquisition unit 3 for example adopt that such private siding such as ether (R) cable, USB (Universal Serial Bus) cable is connected.Data acquisition unit 3, be used to gather the data in order to safeguard of lift car 1, for example adopt the 31 pairs of vibration datas of accelerometer that are installed in the lift car to gather, utilize microphone that sound data (being used to detect abnormal sound) is gathered, unillustrated detection among the figure is gathered at the signal of the stop position of each layer.These signals of being gathered are exported to communicator 5b from data acquisition unit 3 as service data.Like this, transmit monitoring picture and service data,, require communication speed more than the degree of 1Mbps because the data volume of monitoring picture is many.
The formation of communicator 5b for example adopts and the identical formation of communicator 5a that is arranged on the Machine Room, and it adopts communicator 5a to describe in detail.Though communicator 5b is connected with 2 twisted wires of electric wire in being arranged on trailing cable 7 (being also referred to as removal cable or the cable of advancing) between lift car 1 and the Machine Room side, adopts line chart to represent at this.Trailing cable 7 for example has formation shown in Figure 2, and both shielding did not have multiple twin yet, only will tie up bundle together as many of the twisted wires of electric wire.In the present embodiment, 8 twisted wire formations are a branch of, and 4 bundles are set therein.Electric wire (twisted wire) in the trailing cable 7 is the electric wire that is subjected to the influence of electromagnetic noise easily owing to both there be not shielding also not have multiple twin.This trailing cable 7, be used for illumination with, control with, interlock and to use with, interphone etc.When adopting the trailing cable 7 that has laid, utilize 2 of the untapped twisted wires (for example preparing line) of the part of trailing cable 7, communicate the intercommunication mutually between device 5a and the communicator 5b.This line is called order wire 71.Be called interphone line 72 with interphone 4 bonded assembly twisted wires.Again control with, interlocking is called control line 73 with twisted wire.Because lift car 1 is wanted lifting, the single line in the trailing cable 7, also can adopt single line to communicate, and can not go wrong in company with adopting twisted wire according to flexual viewpoint.Interphone 4 is to be used for being purpose with lift car 1 outer the conversation, transmits acoustic information by interphone line 72 and the interphone device (interphone communicator) 6 that is arranged on the Machine Room.Be input to control setup 8 by the signal (controlling necessary signal) that is arranged on various sensors (not drawing among the figure) output on the lift car 1 by control setup 14, control line 73.
Constitute the on-off element (for example IGBT, thyristors such as bipolar transistor, FET, silicon control) of inverter 81 since its open, the disconnected action produce electromagnetic noise.This electromagnetic noise, the on-off element conducting or by the time, be the definite high frequency noise of switching speed of the inductance, distributed capacitance and the on-off element that form by the wiring in the circuit.The result of Huo Deing shows by experiment, and this frequency to tens of MHz, reaches hundreds of MHz at hundreds of KHz sometimes.Further, in order to carry out the speed control of lift car 1, the frequency of electric moter voltage is variable, can produce electromagnetic noise below tens of KHz by the first-harmonic of this frequency and high order harmonic.Its result shows, lift car 1 electromagnetic noise in motion, and its main body is below number MHz.One is for example shown in Figure 3.The noise that lift car 1 is overlapped in motion on the order wire 71 is represented together with transmission signals of communicating by letter and reception in the figure.Will be explained below for these relations.Show the power height of noise below about 5MHz among the figure, and very not high more than about 5MHz.For example, directly adopting this order wire 71 in the experiment of the picture signal of the output of Machine Room side surveillance camera 2, when lift car 1 travelled, the image of receiver side was upset, and reaches the degree that can not monitor.And also overlapping at the above noise of 5MHz, utilizing this band territory to communicate also can become obstacle.
Interface between server 9 and the communicator 5a, for example standard specifications such as ether (R) or USB that adopt for this reason, are provided with protocol converter 56 more in communicator 5a.Protocol converter 56 obtains data from server 9, is transformed into the communications packets of given format in communicator 5a.Access controller 55, when the communications packets that receives from protocol converter 56, with these data to modulator 57 outputs.Modulator 57 is given each carrier wave according to the data allocations amount information 55b of each carrier wave with above-mentioned data allocations.This is also referred to as Bit Allocation in Discrete.Distributed the signal of data to be transformed into analog signal by D/A58 on carrier wave, amplified by transmit amplifier 59, to order wire 71 outputs, 5b communicates with communicator by BP filter 60.
On the other hand, from the signal that communicator 5b sends,, the signal of communication band is exported to receiving amplifier 51 by the signal that BP filter 50 suppresses outside the communication band.The 51 pairs of signals that received of receiving amplifier amplify the back to A/D52 output, and the signal that is transformed into after the digital signal by A/D52 is exported to balancer 53.Balancer 53 is devices that the communication road distortion (being also referred to as the distortion of transmission road) to order wire 71 is proofreaied and correct.The signal that communicates after the correction that distorts on the road is handled is exported to demoder 54.In demoder 54, according to the data allocations amount information 55a of each carrier wave of other input, take out the data of distributing to each carrier wave, to access controller 55 outputs.In access controller 55, the data of being taken out are transformed into the communications packets of given format, to protocol converter 56 outputs.Protocol converter 56 carries out protocol conversion with this communications packets so that the interface (for example ether (R) or USB etc.) that can convey between the server 9 obtains, and with information to server 9 output.
As shown in Figure 3, the noise that overlaps on the order wire 71 is high more at low frequency more, and at high frequency, for example very not high more than 5MHz.From communicator 5b when communicator 5a transmits data, even communicator 5b is sent to information strength on the order wire 71 and is illustrated in figure 3 as when constant, because the characteristic of order wire 71 has frequency dependence, the signal strength that is received by communicator 5a reduces more at high frequency more, and change.This is because the decay of the signal of communication that the electrostatic capacity between the trip path of the inductance of order wire and order wire forms and cause in the institutes such as reflection of the end points of order wire 71.For the stabilized communication (communication speed is more than the 1Mbps degree) that carries out monitoring picture, the S/N of the ratio of received signal and noise (poor for it when representing with db) need be more than given, if estimate the decay in the high frequency band territory of received signal, wish to use the following frequency band of 30MHz as communication band.In addition, as the standard of EMI (Electromagnetic interference, electromagnetic interference), more than 30MHz, be defined as radiation electric field intensity in the place at the 10m place that is separated by below 30db μ V/m.Therefore, like this,, can suppress the electric field of outside radiation is promptly radiated noise by limiting employed frequency band.Also has the anti noise that can suppress to the radiation of the people in lift car 1 again.The communication road distortion of balancer 53 correction communication lines 71 is that correct restored data needs separating timing.This is to adopt the preamble signal in the communication that the distortion of communication road is estimated, and adopts this evaluation result to proofread and correct.As shown in Figure 3, the received signal after 53 pairs of decay of balancer is amplified, and at this moment because noise component also is exaggerated, does not improve S/N.If this balancer 53 not, because the influence of communication road distortion, can not restored data, promptly produce transmission error.Will be explained below for this point.
Below situation when adopting a plurality of carrier waves (multicarrier) in the service band as carrier wave be example, the structure of estimating S/N, change data allocations amount is described.Fig. 4 represents the spectrogram of multicarrier.The carrier wave of bandwidth deltaf f is divided into a plurality of in service band, in order to allow non-overlapping between carrier wave and the carrier wave, and the gap of the given bandwidth of generally between carrier wave, being separated by.The bit that distributes given transmission data on each carrier wave.As shown in Figure 5, as the OFDM (vertical frequeney is multiple to be cut apart) of the extraordinary circumstances of multicarrier,, allow the power of other carrier wave be zero to dispose each carrier wave like that at the peak point of carrier wave, the bandwidth of each carrier wave is Δ f, and the inverse fourier transform of (Δ f/2) is kept its perpendicularity in the time 1/.For this reason, different with general multicarrier, even each carrier wave overlaps, signal also can restore, and have service band can be narrower than general multicarrier, and the characteristics of the general overloading wave height of frequency utilization efficiency ratio.In addition, OFDM also belongs to a kind of of multicarrier.
As the mode that adopts carrier wave to communicate, the mode (being called the multi-carrier communication mode) that adopts a plurality of carrier waves as described above to communicate is arranged, communicating mode (being called the single carrier communication mode) with the single carrier wave of employing, all is to transmit after distribute data on the carrier wave (bit).Transmitting after distribute data on the carrier wave, is because the S/N of each carrier wave is restricted to the data sendout.The multi-carrier communication mode is that the mode that a plurality of narrowband carriers communicate is set in service band.For this reason, overlap in the noise on the order wire 71, if the noise level height of characteristic frequency, low than other carrier wave just at the S/N of the carrier wave consistent with the strong noise frequency, and the data allocations amount of this carrier wave is just become lower, can keep high data allocations amount as whole carrier wave.Its result can guarantee high transfer rate.Like this, the multi-carrier communication mode owing to adopt a plurality of carrier waves to communicate, just reduces its data allocations amount for the specific carriers behind the S/N step-down.To this, in the single carrier communication mode, even after the noise level of specific carriers increases, because carrier wave has only one, the data volume of distributing to this carrier wave reduces, and compares with the multi-carrier communication mode, and transfer rate can quite reduce.Particularly in order to transmit the monitoring picture of lift car 1, require the above transfer rate of 1Mbps, the multi-carrier communication mode is more suitable than single carrier communication mode.
Though use a plurality of waveforms (amplitude is different with phase place) at each carrier wave, distribute data on this waveform (bit) transmits, modulation when adopting a plurality of transmission waveforms to transmit is called many-valued modulation, S/N by each carrier wave is restricted to this data allocations amount (being also referred to as bit allocation amounts), is called relation shown in Figure 6.For example, if transmission error rates sets 1/10 for
5, in 256QAM, 64QAM, 16QAM, QPSK, BPSK, the S/N that needs is about 22.5dB respectively, is about 17.7dB, is about 13.5dB, is about 9.5dB, is about 6.3dB.In 256QAM, can distribute 8 bits, in 64QAM, can distribute 6 bits, in 16QAM, can distribute 4 bits, in QPSK, can distribute 2 bits, in BPSK, can distribute 1 bit.If S/N less than 6.3dB, incites somebody to action not allocation bit.In addition, QAM is called quadrature amplitude modulation (QuadratureAmplitude Modulation), QPSK is called Quadrature Phase Shift Keying (Quadrature Phase ShiftKeying), BPSK is called binary phase shift keying (Binary Phase Shift Keying), QAM is an amplitude modulation, and QPSK and BPSK are phase modulation.In above-mentioned example, though do not point out 128QAM, 32QAM etc., other QAM also exists.In addition, by the additional error code calibration function, transmission error rates can be from 1/10
5Rise to 1/10
7Therefore, for example, if speed of transmission is 1Mbps, its probability is that error code takes place 1 10 seconds, by transmitting the transfer frame produced error code once more, just can not can exist under the situation of any problem and carries out stabilized communication.
[the supposition evaluation of S/N]
Below, with reference to Fig. 7, the evaluation of S/N is described.Fig. 7 represents to transmit the exercise data that are used to estimate S/N from communicator 5a to communicator 5b with the processing flow chart of certain hour interval to the S/N evaluation, calculates the example of S/N thus.In addition, transmitting the exercise data be used to estimate S/N from communicator 5b to communicator 5a, to calculate the situation of S/N thus also identical.When communicator 5a transmits common data, implement the 1st and go on foot the 5th flow process that goes on foot, the processing that S/N estimates is implemented by interrupt handling.At this,, be example with the interrupt handling that starts at certain hour as interrupt handling.Processing shown in Figure 7 is undertaken by access controller 55.In common data transmit,, become bag data in the communicator according to the data creating that takes out from protocol converter 56 at first in the 1st step.Then, in the 2nd step, the bag data of made are exported to modulator 57.Like this, after data are modulated, export to communicator 5b.For the data that send from communicator 5b, shown in the 3rd step, take out bag data from demoder 54.The 4th step implement CRC (CycleRedundancy Check: evaluation Cyclical Redundancy Check), transmit Error detection.In the 5th step, if the transmission error code is arranged, send the request that transmits once more to communicator 5b, if do not transmit error code, the data of taking out are exported to protocol converter 56.
Under the state of having implemented so common data communication processing, be embodied as the interrupt handling that S/N estimates.In the 6th step, pre-prepd exercise data are exported to modulator.Its result after the exercise data are modulated, transmits to communicator 5b.To this, communicator 5b receives the exercise data in the 10th step, calculates the S/N of each carrier wave in the 11st step.This calculating be will be explained below.Further, in the 12nd step, carrier index and bit allocation amounts as a pair of bag data that are transformed into, are exported to modulator.Carrier index and bit allocation amounts conduct are to being called as bit distribution information.This result transmits bit distribution information (carrier index and bit allocation amounts) from communicator 5b to communicator 5a.In order to upgrade the bit distribution information of communicator 5b itself, implement the rewriting of bit distribution information again.This bit distribution information will separated the timing use by the demoder of communicator 5b from the data that communicator 5a sends.Then, communicator 5a receives the bit distribution information that sends from communicator 5b in the 7th step, implements the rewriting of bit distribution information table in the 8th step.After this processing finishes, transmit the ACK of the rewriting end of expression bit distribution information in the 9th step.In communicator 5b, receive ACK, end process in the 13rd step.After this processing finishes, transmit exercise information from communicator 5b to communicator 5a, to carry out the evaluation of S/N to the transmission of communicator 5a from communicator 5b.If the S/N of order wire is symmetrical, will there is no need, if when S/N does not have symmetry, doing like this is actv..For elevator, in communicator 5a one side, inverter is eager to excel at the noise of communicator 5b in the noise ratio of communicator 5a side as the inverter of noise source.Therefore, because the S/N among the communicator 5a reduces, when communicator 5a transmitted data, the bit of distributing to each carrier wave need reduce according to S/N from communicator 5b.Like this, when having difference between the S/N of each communicator, implement the evaluation of S/N on twocouese, the bit distribution information that is obtained by this result is kept in each access controller 55, is utilized in modulation and demodulation.
Being to transmit the exercise data or transmit common data, is need be distinguishing, and this can realize by constituting transformat shown in Figure 8.This transformat is made of preamble signal, head, data, CRC.Expression is exercise information or common data message in head.If in head the expression be exercise information, in data, then put into the exercise use data, in head if data message is then put into common transmission data in data.Using data as exercise, 256QAM, 64QAM, QPSK etc. are arranged, at this, for the ease of understanding, is that example describes with QPSK.In addition, to be used for signal synchronous for preamble signal.QPSK is the modulation system of distributing 2 bits on each carrier wave, and signal location disposes as shown in Figure 9.To the data allocations of signal location, for example represent data " 00 " at the signal location of the 1st quadrant, represent data " 01 " at the signal location of the 2nd quadrant, represent data " 11 " at the signal location of the 3rd quadrant, represent data " 10 " at the signal location of the 4th quadrant.For this reason, after the data that transmit All Quardrants, can more correctly estimate S/N.If not strict, as also can to utilize 2 bits to constitute proper data.For example, also can constitute, utilize " 00 ", " 11 ",, utilize " 00 " by the data formation of the 1st quadrant by the data of the 1st quadrant and the 3rd quadrant.
As the exercise data of Fig. 7, be set at " 00 ", " 01 ", " 11 ", " 10 ".At this moment, as the bit distribution information of exporting to modulator 57 from access controller 55 in Fig. 1, output distributes the information of 2 bauds (QPSK) on each carrier wave.Like this, modulator 57 with the exercise data of 2 bits, distributes 2 bits to transmit by the QPSK modulation on each carrier wave.In when exercise,, whole carrier wave is implemented QPSK modulation back transmit data owing to be to be purpose with the S/N that estimates each carrier wave.When exercise, adopt the QPSK modulation to transmit owing to pre-determine, receiver side adopts QPSK to carry out demodulation.In addition, all identical for its amplitude of all signal locations in QPSK, and have only the phase place difference, demodulation process is very simple.Also can adopt 256QAM, 64QAM etc. to implement exercise.
The evaluation of S/N is implemented as follows.For QPSK, if on order wire, both there be not noise, also not decay, the signal location after the demodulation is as shown in figure 10.But, noise is arranged on order wire, and decay is arranged.Owing to adopt the balancer 53 of Fig. 1 to proofread and correct, the signal after the demodulation restores around true value in the signal location configuration basically for decay.In Figure 10, scope shown in the circle is the signal point position after the demodulation.The strength S of the distance expression signal from the initial point to the true value, the intensity N of the distance expression noise of the signal point position after from the true value to the demodulation.Therefore, can obtain S/N if calculate ratio between two.In exercise, because modulation system is determining that in advance the residing position of true value can be kept in the communicator in advance.As mentioned above, calculate the mode of S/N, adopt the mode of aviation value in addition except adopting true value.This is the aviation value that calculates the signal point position after the demodulation, and the distance that adopts this result and initial point is as S, and the distance of the signal point position after each demodulation is as the mode of N.In any mode,, need repeatedly transmit the exercise data at each carrier wave for more accurate evaluation (inferring or mensuration) noise.Consider the lift car image monitoring, require per second to carry out image monitoring in the prior art, therefore also wish to press a second level, implemented to practise in preferred per 1 second.
[transmitting bit error ratio evaluation]
Then, the mode with the event implementation exercise is described.This is handled as shown in figure 11.Being with the difference of Fig. 7, is not to implement exercise at regular intervals, when the transmission error code repeatedly takes place, implement exercise in implementing common data transmission.For this reason,,, calculate error code generation frequency in the specified time,, implement exercise if when this result has exceeded predetermined given value in the 5th step according to the error code collation that is undertaken by CRC in the 4th step shown in Figure 11.Same for exercise and Fig. 7, by implement the 6th go on foot the 13rd the step finish.After this exercise finishes, implement common data communication.In addition, in this embodiment, though according to the transmission error code that when communicator 5a transmits data, takes place from communicator 5b, carry out exercise from communicator 5a to communicator 5b, on the contrary, for the transmission error code that basis takes place when communicator 5b transmits data from communicator 5a, the exercise of carrying out from communicator 5b to communicator 5a also can be implemented equally.
Like this,, promptly when the S/N variation, practise, compare, have the high characteristics of transmission efficiency with the mode of implementing exercise at regular intervals at interval owing to require to practise (event driven exercise) according to transmitting error code.
Further, if also with this event driven exercise and exercise at regular intervals, transmission efficiency further improves.That is, can practise when the S/N variation, and after S/N improves,, can carry out the data allocations under the high S/N state, transfer rate is further quickened by exercise at regular intervals by event driven exercise.If have only event driven exercise, the exercise institute determination data in the time of then can only adopting by the S/N variation is distributed, and this can not improve transfer rate.By also in two ways, can address this problem., handle as long as adopt the processing of Figure 11 to implement event driven exercise by access controller, the exercise of implementing at regular intervals in interrupt handling gets final product for this reason.
[ofdm communication]
On the superincumbent basis, the multi-carrier communication mode that comprises OFDM by utilization communicates between communicator 5a, 5b, even there is the frequency that to guarantee enough S/N, its result exists in the time of can not carrying out the carrier wave of data allocations, if the S/N height of other frequency, on these frequency carriers, can carry out more data and distribute, can guarantee enough communication speeds that 1Mbps is above on the whole.Further, OFDM is because frequency utilization efficient height can be guaranteed equal communication speed in than the narrower frequency band of general multi-carrier communication mode.For this reason, though the inverter noise can make S/N with frequency change, the variation of this S/N has the characteristics that easy employing S/N sets as service band than higher frequency band owing to be in frequency limit to a certain degree in OFDM.
[S/N of single carrier estimates]
Below S/N when using single carrier estimate and describe.Use single carrier,, need widen the frequency band of single carrier in order to realize the transfer rate identical with multicarrier.By widening the frequency band of single carrier, can accelerate transfer rate.As modulation system, owing to do not change with multicarrier, Fig. 7 and exercise shown in Figure 11 can directly be suitable for.By, S/N estimates also as shown in figure 10.
[alter mode of carrier frequency]
Below, the mode according to S/N evaluation result change carrier frequency is described.Though in Fig. 7 and Figure 11, show the situation of change data allocations amount, also can not change the data allocations amount, and the frequency of carrier wave is altered on the frequency band of S/N more than equal (being also referred to as displacement).At this moment, the carrier frequency modification information substitutes data allocations amount information 55a, 55b shown in Figure 1, is exported to modulator 57 and demoder 54 by access controller 55.In addition, implement the mensuration of S/N in advance, determine to be altered to that frequency band.Under this mode, during single carrier, because carrier wave is 1, its change is handled easily and is realized.But the service band of communication must be the enough wide frequency band that can carry out the frequency change.
As mentioned above, by adopting the high carrier signal of S/N to communicate, perhaps in the high frequency band of S/N, communicate,, the inverter for elevator that allows lift car travel produces noise even moving, can not be subjected to its big influence yet, can adopt a part of line stabilization of many twisted wires that constitute trailing cable to carry out the interior image of lift car and the transmission of service data.
[spread spectrum communication mode]
With reference to Figure 12 the lift car monitor unit that adopts spread spectrum communication mode to communicate is described.Figure 12 represents to be suitable for the embodiment of spread spectrum communication mode.The point different with Fig. 1 is the part of relevant modulator 57 and demoder 54, and other is identical.The multi-carrier mode that comprises OFDM is the bit allocation amounts of each carrier wave of change, and spread spectrum communication mode does not carry out such processing, communicates but base band is extended to wideer frequency band, is separating timing compression base band, restored data.This spread spectrum communication mode, for overlapping when communicating under the situation of random noise on the road in communication, can improve S/N, carry out stable communication, be particularly suitable for lift car noise (being called the frequency selectivity noise) communication that level is high under such special frequency band when driving.Difference with Fig. 1 is described.Modulator 57, when spread spectrum communication mode, be also referred to as demoder No. 1 time, various modulation systems such as 16QAM, the 64QAM that amplitude modulation, frequency modulation (FM), phase modulation (BPSK, QPSK), phase place and the amplitude that can adopt in common transmission to be adopted modulated simultaneously, 256QAM.The output signal of modulator 57 (signal after 1 modulation) input spread spectrum modulator 63.Signal times after 63 pairs of 1 modulation of spread spectrum modulator is exported to D/A58 with after being called the special waveform of PN (Pseudorandom Noise) series from 64 outputs of escape character producer.This processing also can adopt analog processing circuit to realize, does not at this moment need D/A58.Handle by these, the signal after the band spectrum modulation communicates to communicator 5b from communicator 5a.Bandwidth after the band spectrum modulation is respectively the bandwidth and the PN sequence sum of 1 modulation.Usually because the multiplying power of band spread is big, the bandwidth of PN sequence just becomes the bandwidth of spread signal in fact.Therefore, service band need than 1 time the modulation the wideer frequency band of bandwidth (base band), wish the rate of spread more than 5 times, when lift car drives owing to noise level than higher, wish at least more than 10 times.For the monitoring picture that carries out in the lift car transmits and the service data transmission, even the minimum transfer rate that also requires 1Mbps, base band requires at least at 1MHz, and therefore, service band also requires the above frequency band of 10MHz of its 10 octave band.And as shown in Figure 3, judging according to its measurement result, is exactly actv. more than 5MHz.That is, when lift car drives, more than the 5MHz and to use as service band with the frequency band more than the 10MHz at least be actv..
On the other hand, handle in the following manner for demodulation.The output signal of A/D52 is to timing/ synchronous circuit 61 and 62 outputs of spread spectrum inverse converter.After employing is multiplied each other once more with the employed identical PN sequence of transmitter side in spread spectrum inverse converter 62, restore the signal of 1 modulation.This processing is also referred to as band compression.By this band compression, can improve the S among the S/N, the N of the frequency selectivity noise that the inverter noise when suppressing the lift car driving is such.For this reason, the S/N of the demodulation process in demoder 54 is enough high, and the influence of noise on the road that can not be subjected to communicating by letter resets into original signal.In addition, regularly/synchronous circuit 61, be used for when spread spectrum inverse converter 62 multiplies each other with the PN sequence once more, obtaining synchronously.Again, regularly/synchronous 61 and spread spectrum inverse converter 62 when adopting analogous circuit to realize, do not need A/D52.
As mentioned above, by adopting spread spectrum communication mode between communicator 5a and communicator 5b, to communicate, because needed for determining the exercise of bit allocation amounts when there is no need to be implemented in the multi-carrier communication mode, have the monitoring picture that can be all the time under the situation of interruption not occurring transmitting, carries out in the lift car and the transmission of service data.
(the 2nd embodiment)
Below the 2nd embodiment that utilizes the lift car monitor unit that interphone line 72 communicates is described.
With reference to Figure 13 any of the signalling methods of the multi-carrier communication mode that comprises OFDM that adopts above explanation, single carrier communication mode, change carrier frequency, spread spectrum communication mode described the 2nd embodiment that the monitoring picture and the service data of lift car are sent to outside the railway carriage or compartment.In communicator 5a side, with interphone 4 and carry out aud. snl. communication interphone device (interphone communicator) 6 bonded assembly interphone lines 72 be connected frequency divider 80a midway, be connected with communicator 5a by this frequency divider 80a.In communicator 5b side, the frequency divider of the connection midway 80b at the interphone line 72 that connects interphone 4 is connected with communicator 5b by this frequency divider 80b.The communication information between interphone device 6 and the interphone 4 is an aud. snl., and its frequency band is 4KHz.On the other hand, the communication information between communicator 5a and communicator 5b is the monitoring picture and the service data of lift car, owing to require the above transfer rate of 1Mbps at least, needs the above communication band of megahertz (MHz).That is, shared interphone line 72, the two signal of aud. snl. by being used for intercommunication and the monitoring picture in the lift car and service data.For this reason, frequency divider 80a, 80b are set.Aud. snl. is the following signal of 4KHz, the monitoring picture of lift car and service data are the above signals of megahertz (MHz), and both frequencies differ greatly, and utilize difference on the frequency, dividing frequency communicates, and can utilize 1 interphone line to transmit both signals simultaneously.Again, interphone line 72 is owing to overlapping vdc, and communicator 5a, 5b are connected with frequency divider by coupler 65.For the formation of frequency divider 80a, 80b, as shown in figure 14, be example with 80a.Also show the formation of coupler 65 among the figure.In addition, interphone line 72 is not a line chart, but represents with 2 wires.Frequency divider 80a blocks filter 80a1 at the high frequency that comprises of interphone line 72 midway, and 80a1 is connected with interphone device 6 by high frequency blocking-up filter.The purpose of high frequency blocking-up filter 80a1 is with the signal blocker more than the megahertz of communicating by letter between the communicator (MHz), and the aud. snl. below the 4KHz is passed through.For this reason, also can adopt low-pass filter to substitute high frequency blocking-up filter 80a1.The blocking frequency of high frequency blocking-up filter 80a is just enough at 100KHz.The cutoff frequency of low-pass filter also can be at 100KHz, and is in order to suppress the N/R high frequency, just enough in the degree of 40KHz (4KHz ten times).The interphone line 72 of utilization between high frequency blocking-up filter 80a1 communicates the communication between device 5a, the 5b.Because interphone line 72 is overlapping vdc, coupler 65 adopts electric capacity to block direct current, high pass characteristic by being determined by the static capacity value of the inductance of voltage transformer and this electric capacity can overlap onto on the interphone line 72 under the situation of the high frequency attenuation that does not make megahertz (MHz).In communicator 5a, 5b, owing to be provided with the bandpass filter (BP filter) 50,60 that only allows communication band pass through, aud. snl. can not enter in the communicator.When not having overlapping vdc on the interphone line 72, there is no need to adopt coupler 65.By above such formation, situation about can not obscure between the signal of communication of the monitoring picture of aud. snl. and lift car and service data is carried out frequency division communication.
In said apparatus, even since on the interphone line 72 overlapping under the state of vdc by utilizing coupler 65 between communicator 5a, 5b, to communicate, therefore also can adopt electric wire from vdc to lift car that supply with, substitute interphone line 72, between communicator 5a, 5b, communicate.At this moment, frequency divider 80a adopts the formation of Figure 14, gets final product and just interphone line 72 is changed into the electric wire of supplying with vdc.In addition, interphone 4 and interphone device 6 in order to carry out the communication of aud. snl., also are provided with the filter that only allows the frequency band of this aud. snl. pass through sometimes.This filter is low-pass filter, is high-cut filter, shown in the bandpass filter 50 and 60 of communicator 5a like that, and order wire between interface position on be provided with.Therefore, the function of high frequency blocking-up filter 80a1 shown in Figure 14 can be finished by this filter.Its result can cancel the high frequency of Figure 14 and block filter 80a1.That is, do not need frequency divider 80a, only need coupler 65 is connected with interphone line 72, utilize interphone line 72, can communicate the communication between device 5a, the 5b.Certainly, between interphone 4 and interphone device 6, can under the situation of any influence that is not subjected to the communication between communicator 5a, the 5b, carry out audio communication.
As mentioned above, be arranged on the formation that the interphone line 72 in the lift car communicates by utilization, do not needing to lay under the situation of new communication line, guaranteeing to prepare under the state of line, can stablize the image and the service data of carrying out lift car and transmit in maintenance.
[installation method of lift car monitor unit]
The following installation method that the lift car monitor unit is described with reference to Figure 15.Figure 15 is illustrated in the figure that is provided with that communicator is set in the elevator.Show the interior space 310 of buildings such as elevating road 200, lift car 1, Machine Room 100, trailing cable 7, building 300, living space or public space of elevator.Pick up camera shown in Figure 12 and interphone (not drawing among the figure) are set in lift car 1.
Communicator 5b is installed in the such moving part of lift car 1, and the service data of in the moving of lift car 1 monitoring picture and the data acquisition unit (device of symbol 3 expressions among Fig. 1) of pick up camera 2 grades being gathered transmits to the opposing party's communicator 5a.Installation method in moving part can be in the inside of lift car 1, also can be in the outside of lift car 1, for example, the arbitrary position in top and side.Again, communicator 5a on the other hand is arranged on not movable part, for example is arranged in the Machine Room 100, also can slimly be stored in the building of elevating road 200.Be not particularly limited in the space of Machine Room 100.Then, communicator 5a and communicator 5b are connected with a part of line of many twisted wires in trailing cable 7 or with unillustrated interphone line 72 among the figure, and a part of line or the interphone line 72 of this twisted wire use as communication line.Be arranged on the communicator 5a of movable part and be provided with between the communicator 5b in the lift car 1 (moving part) and can carry out one to one, perhaps communicator 5a and Duo Tai are arranged between the communicator 5b in the lift car 1 and carry out communicating by letter of 1 couple of N.At this moment, in communicator 5a, need to be provided for controlling the functions such as switch control of a plurality of communications.Again, for the situation of 1 couple of N, communicator 5a preferably is not arranged in the elevating road, and is arranged on in the shared public part of each elevating road.
Like this by not being limited in the Machine Room 100, and on the moving part of elevator and movable part, communicator 5a, 5b are set, can carry out the supervision in the lift car 1.
[the lift car method for monitoring that can monitor monitoring picture and service data]
Communicator 5a shown in Figure 1 is connected with administrative center 11, image storage server 12, servicing center 13 with communication network 10 by server 9.Administrative center 11 carries out the management of relevant building and equipment together with servicing center 13.Servicing center 13 carries out services such as Maintenance and Repair according to service data to the equipment of the relevant building that comprises elevator.Again, image storage server 12 is servers of the monitoring picture that sends from communicator 5a of storage.Monitoring picture, by being arranged on pick up camera 2 collections such as grade in the lift car 1, after service data adopts data acquisition unit 3 to gather, be sent in the image storage server 12 by communication line, communicator 5a such as communicator 5b, a part of line of many twisted wires in trailing cable 7 or interphone lines 72.This monitoring picture and service data owing to transmit in real time, can monitor at any time in administrative center 11 or servicing center 13.According to the present invention, monitoring picture is owing to transmit in real time, can save this such monitoring picture being kept in the memory storage that is arranged in the lift car 1 before every 1 second, and then the trouble of taking out, can tackle various case in the lift car 1 in real time.In addition, image storage server 12 also can be used as one of system in administrative center 11 or the servicing center 13 and is provided with.
In recent years, begin to construct the building of the information equipment that comprises internet and supervision various device, so-called IT building etc.Monitoring picture and the service data obtained by the monitor unit of lift car as the safety of these IT buildings with safeguard the management information of usefulness, can be used effectively.
That is, apartment, office building or taxi building along with the progress of ITization and the progress of the communication technology, also begin configuration information equipment and information terminal, and its typical example is the apartment, internet that can carry out the internet.Server is set in the apartment, and the LAN in the employing apartment connects the microcomputer of each resident family.Again, have and to carry out the control of the information household appliances of open and close control to illumination, air-conditioning and water heater, further, has the sense of security that adopts various sensors and surveillance camera, these and infrastructure management company (administrative center) and guard company (servicing center) can tackle when urgent in real time at wire joint.Facilities and equipment is gathered the information that is used to safeguard, regularly carries out upkeep operation and daily operation management according to service data.Equipment and instruments such as elevator, escalator, electrical equipment, conditioning unit, the equipment of taking precautions against natural calamities by infrastructure management company's distant surveillance, regularly comprise the management of maintenance.Monitoring picture and service data by the lift car monitor unit is gathered as one of them, monitor in infrastructure management company (administrative center) and servicing center, can be used effectively.
Like this, monitor monitoring picture and the service data obtain, can be used for the distant surveillance of the safety of elevator and motoring condition etc. by lift car.
In addition, in the present embodiment, though the situation that adopts trailing cable 7, interphone line 72 is illustrated as order wire, trailing cable 7 generally just is made of many twisted wires (not having multiple twin), multiple twin in trailing cable, do not pack into to line and coaxial cable, certainly, also can adopt multiple twin to line and coaxial cable as order wire.At this moment,, further improve S/N, and can carry out high-speed communication, shorten the communication cycle of service data, improve monitor performance better owing to can reduce the noise level that overlaps on these lines.
(effect of invention)
More than, according to the present invention, though inverter for elevator action and produce noise, can be not Can be subjected in the situation of its big impact, adopt to consist of the retinue cable many twisted wires a part or The intercom line stabilization implements to transmit monitoring picture and the service data (data of travelling) in the lift car. Again, there is no need to lay new order wire, in that guarantee to prepare can be with lift car under the state of line It is remote that interior monitoring picture and service data (data of travelling) are used for safety and transport condition etc. In the supervision.
Claims (10)
1. a lift car monitor unit is the interior monitoring picture of supervision lift car and the lift car monitor unit of service data, it is characterized in that:
In lift car and elevating road or Machine Room, communicator is set, adopt the twisted wire that is encased in the trailing cable to connect two communicators, described communicator with described twisted wire as order wire, adopt a plurality of carrier signals and each carrier signal distributed and transmit data and communicate, perhaps adopt to expand to the spread spectrum communication mode that wideer frequency band communicates and communicate.
2. lift car monitor unit according to claim 1, it is characterized in that: described lift car monitor unit, in this communicator, adopt a plurality of carrier signals and each carrier signal is distributed when transmitting data and communicating, S/N at the ratio of each carrier signal supposition or measured signal and noise, according to the S/N value that institute infers or measures, after the transmission data allocations amount of change to each carrier signal, communicate.
3. lift car monitor unit according to claim 1, it is characterized in that: described lift car monitor unit, in this communicator, when distributing transmission data to communicate when a plurality of carrier signals of employing and to each carrier signal, transmit the bit error ratio at each carrier signal evaluation, according to the transmission bit error ratio of being estimated, after the transmission data allocations amount of change to each carrier signal, communicate.
4. lift car monitor unit according to claim 1, it is characterized in that: described lift car monitor unit, in this communicator, when distributing transmission data to communicate, adopt the multiple signalling methods of cutting apart of quadrature carrier to communicate when a plurality of carrier signals of employing and to each carrier signal.
5. lift car monitor unit according to claim 1, it is characterized in that: described lift car monitor unit, in its communicator, adopt a plurality of carrier signals and when carrier signal distribute transmitted data and communicate, carrier signal has been judged whether to obtain the S/N of the ratio of predetermined noise, when judged result when predetermined S/N is following, with the frequency of carrier signal be altered to predetermined different frequency after, communicate.
6. lift car monitor unit according to claim 1, it is characterized in that: described lift car monitor unit, when distributing transmission data to communicate when a plurality of carrier signals of employing and to each carrier signal, utilizing at least in the communication of described two communicators, the frequency below the above 30MHz of 5MHz communicates.
7. lift car monitor unit according to claim 1 is characterized in that:
The twisted wire that is encased in the described trailing cable is the interphone line, with be arranged on car in interphone bonded assembly interphone line midway be arranged on car outside midway being connected with frequency divider respectively of interphone communicator bonded assembly interphone line, adopt described interphone line as order wire, communicate by described two frequency dividers.
8. a lift car method for monitoring is the interior monitoring picture of supervision lift car and the lift car method for monitoring of service data, it is characterized in that:
In lift car and elevating road or Machine Room, communicator is set, adopt the twisted wire that is encased in the trailing cable to connect two communicators, with described twisted wire as order wire, adopt a plurality of carrier signals and each carrier signal is distributed the transmission data, perhaps adopt and expand to the spread spectrum communication mode that wideer frequency band communicates, can implement the monitoring picture and the service data that transmit, monitor that lift car is interior.
9. lift car method for monitoring according to claim 8 is characterized in that:
The twisted wire that is encased in the described trailing cable is the interphone line, as order wire, can implement the monitoring picture and the service data that transmit, monitor that lift car is interior with described interphone line.
10. the installation method of a lift car monitor unit is the installation method of the lift car monitor unit of interior monitoring picture of supervision lift car and service data, it is characterized in that:
In lift car and elevating road or Machine Room, communicator is set, two communicators are adopted twisted wire or the interphone wire joint that is encased in the trailing cable, with described twisted wire or interphone line as order wire, described communicator adopts a plurality of carrier signals and each carrier signal is distributed and transmits data and communicate, and perhaps adopts to expand to the spread spectrum communication mode that wideer frequency band communicates and communicate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002312547 | 2002-10-28 | ||
| JP2002312547A JP3894487B2 (en) | 2002-10-28 | 2002-10-28 | Elevator car monitoring device and method, and elevator car monitoring device mounting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1498846A CN1498846A (en) | 2004-05-26 |
| CN1323922C true CN1323922C (en) | 2007-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101044085A Expired - Fee Related CN1323922C (en) | 2002-10-28 | 2003-10-28 | Elevator cabin monitor and method thereof and mounting method for such monitor |
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| JP (1) | JP3894487B2 (en) |
| CN (1) | CN1323922C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007221614A (en) * | 2006-02-20 | 2007-08-30 | Hitachi Ltd | Intra-automobile communications apparatus |
| JP4571606B2 (en) * | 2006-10-16 | 2010-10-27 | 株式会社日立製作所 | Elevator car monitoring device |
| JP2008308244A (en) * | 2007-06-12 | 2008-12-25 | Nippon Otis Elevator Co | Information transmission system for elevator |
| CN102983882A (en) * | 2011-09-05 | 2013-03-20 | 秦皇岛国安电力电子技术有限公司 | Method, system, and signal processing device for transmitting network data by using trailing cable |
| JP5987750B2 (en) * | 2013-03-29 | 2016-09-07 | 三菱電機株式会社 | Elevator camera equipment |
| CN103264937B (en) * | 2013-05-10 | 2016-04-20 | 苏州汇川技术有限公司 | Double-shaft elevator system and control method |
| JP6106575B2 (en) * | 2013-11-13 | 2017-04-05 | 株式会社日立ビルシステム | Elevator equipment |
| CN104555639B (en) * | 2015-01-05 | 2017-07-18 | 湖南崇友电梯科技有限公司 | Elevator repair and maintenance method for monitoring |
| US10171182B2 (en) | 2015-01-25 | 2019-01-01 | Valens Semiconductor Ltd. | Sending known data to support fast convergence |
| EP3293931A1 (en) * | 2015-01-25 | 2018-03-14 | Valens Semiconductor Ltd. | Transceiver and method for fast recovery from quality degradation |
| US10256920B2 (en) | 2015-01-25 | 2019-04-09 | Valens Semiconductor Ltd. | Mode-conversion digital canceller for high bandwidth differential signaling |
| CN105245411B (en) * | 2015-11-18 | 2018-05-11 | 中景恒基云端物联网科技成都有限公司 | A kind of processing method for elevator shaft internet of things equipment lradio communication failure |
| EP3978411A1 (en) * | 2020-10-02 | 2022-04-06 | KONE Corporation | Condition monitoring of an elevator |
| CN112225038B (en) * | 2020-10-21 | 2022-02-22 | 南京卓欧信息技术有限公司 | Detection system for health state monitoring of elevator trailing cable signal cable |
| CN113213298B (en) * | 2021-05-18 | 2022-01-07 | 江苏荣泽信息科技股份有限公司 | Elevator running state intelligent detection system based on block chain |
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| US5086450A (en) * | 1989-08-23 | 1992-02-04 | Mitsubishi Denki Kabushiki Kaisha | Emergency intercommunication system for elevator |
| CN1059880A (en) * | 1990-09-10 | 1992-04-01 | 株式会社日立制作所 | The apparatus and method of elevator monitoring diagnostic |
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| US5086450A (en) * | 1989-08-23 | 1992-02-04 | Mitsubishi Denki Kabushiki Kaisha | Emergency intercommunication system for elevator |
| CN1059880A (en) * | 1990-09-10 | 1992-04-01 | 株式会社日立制作所 | The apparatus and method of elevator monitoring diagnostic |
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|---|---|
| JP3894487B2 (en) | 2007-03-22 |
| JP2004142924A (en) | 2004-05-20 |
| CN1498846A (en) | 2004-05-26 |
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