JPH07247071A - Information transmission device for elevator - Google Patents

Abstract

PURPOSE:To increase the transmission distance by providing a transmission line branching device with means for delivering data to a transmission line on the other side after correcting the turbulence of taken-in and detected waveform caused by waveform distortion on a transmission line at the time of relaying data transmission. CONSTITUTION:A transmission line terminal resistance 15 is received and connected to a transmission line I/F 16. The transmission line I/F 16 converts transmission waveform into a control signal and outputs it as an input signal 19. An edge detecting circuit 25 is provided to detect the signal rise of this input signal 19, and a sampling timer circuit 26 is provided to input an edge signal from the edge detecting circuit 25 and a clock signal 23a so as to prepare a timing correction signal 27 for the duty correction of the input signal 19. A buffer IC 28 for taking in the timing correction signal 27 and correcting the input signal 19 to output it again as a transmit signal 20a is further added to input the transmit signal 20a to a transmission line I/F (16) on the other side. The transmission distance can be thereby increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a serial transmission line using a twisted pair cable between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device and an external control device. The present invention relates to an elevator information transmission device for serially transmitting various information signals represented by time data, message data, control operation data, car and hall status data, external input data, etc. by a phase modulation method.

[0002]

2. Description of the Related Art With the recent trend toward intelligent buildings, the needs of customers are becoming more and more prominent, such as the enhancement of elevator control technology and enhancement of human interface technology.

Reflecting these requirements, the amount of control signals for the operation of the elevator itself is not only increased, but also useful information is provided on the display of the elevator car or hall, for example, the display of basic information such as time and weather, So-called service information such as displaying arbitrary information such as event notices, displaying control information such as earthquakes and fires, and providing elevator operation information, car and hall usage status, etc. to the monitoring room and LAN in the building The increase in volume is remarkable,
It is believed that it will be generally accepted more rapidly in the future.

Although the above service information has hitherto been incorporated into transmission means for controlling the operation of an elevator to meet customer demands, recently a LAN dedicated to service information independent of a control system has been constructed for the above-mentioned reason. It has been started to be applied to properties by calling it an information transmission system.

FIG. 5 is a system configuration diagram of a conventional elevator information transmission device. In the figure, 1 is a central information control device, and via an elevator control device 2 and an elevator control device interface (elevator control device I / F) 3,
While it retrieves driving information and provides control information, it downloads necessary information for this system. A twisted pair cable is used for the transmission line 7, and the car information control device 6 (6a, 6b) and the hall information control device 1 in the car 5 (5a, 5b) are connected via the transmission line branching device 4.
3 and a so-called external control device 9 represented by a monitoring device or a LAN I / F / display message input terminal in the building. The transmission speed is 2 Mbps class, and the increase in the amount of information such as color display is taken into consideration, and the token passing system is adopted.
Various efforts have been made to facilitate the connection / disconnection of each node to / from the system and to develop an efficient system by equalizing the CPU load factor of each node.

The twisted pair cable is adopted for the transmission line 7, not to mention that it is cheaper than the optical cable and the coaxial cable, but it is largely due to the ease of handling such as wiring. Particularly regarding the attachment of the transmission line to the car information control device 6, since the car 5 itself moves, it is necessary to incorporate it into the tail cord 8 whose bendability constantly changes, and thus there is a high demand for usability.

The transmission system used in this information transmission apparatus is called a phase modulation system, and data is created by inverting the phase of the reference waveform between 1 and 0 of the data. Data 1
The data string combined with the 0 format is shown in FIG.
Shown in B. In the environment of the transmission rate of 2 Mbps, X and Z in the figure correspond to 0.5 us and Y corresponds to 0.25 us.

FIG. 3 is a hardware configuration diagram showing an example of a conventional transmission line branching device 4, and the diagram shows a transmission line I / F for convenience.
Portion 16 (16) is shown with two ports. The transmission line using the twisted pair cable is a transmission line terminating resistor 15 (this resistor is a termination process for making the transmission line appear to be infinite at the other end node, and is a measure for preventing reflection of the propagation waveform. Is received) and is connected to the transmission line I / F 16.

The transmission line I / F 16 converts the transmission waveform into a 1.0 control signal and outputs it as a reception signal 19. The carrier detection circuit 18 constantly monitors the reception signal 19 and outputs the output control signal 21 when detecting the data reception. The output control signal 21 is a transmission path I / F other than the one being received (other side).
When the transmission line I / F 16 input to (16) detects the output control signal 21, the transmission line I / F 16 prohibits data reception from the transmission line. By this action, when a certain transmission line I / F 16 is receiving data, the other port does not accept the received data, and the relay data is garbled due to the mixed data of a plurality of ports.
The system down is avoided.

A delay circuit using a clock signal 23 supplied from a data sampling clock (hereinafter referred to as OSI) 22 before the reception signal 19 is output to the transmission line I / F 16 of the partner port as an output signal 20. 17
Pass through. In the delay circuit 17, the detection time of the carrier detection circuit 18 and the transmission path I / F of the partner port are described.
The reaction time of the reception prohibition mode of the data of (16) is gained, and this causes the reception signal 19 (output signal 20) to be transmitted to the transmission path I / F (16) of the partner port at the beginning of the data string. Prevents disappearance.

The input waveform, reception signal 19 (detection waveform) and transmission signal 20 (corresponding transmission path output waveform) of the transmission line configured as described above are as shown in FIG. 4 (t indicates a delay time). By these, the data is smoothly distributed to other ports, and the system of FIG. 5 functions.

[0012]

A conventional elevator information transmission device is to distribute and output a data waveform detected by one port to another port. By the way, the transmission path 7 contains internal impedance and capacitance, so that the data distortion and the amplitude decrease occur as the transmission distance increases. FIG. 6C shows this state, and shows the bluntness at the end of the transmission path on the opposite side with respect to the output B to the transmission path of each node. D of FIG. 6 shows a detected waveform in the propagation path I / F portion for C. Since the transmission path I / F unit only converts the transmission waveform in the detection unit into 1.0, a shift of 1.0 in the output time (phase) plane occurs with respect to the waveform of B. That is, the output time of 1.0 fluctuates, such as X'for X and Y'for Y.

The output timing of 1.0 is called a duty. Although each model circuit on the receiving side has a margin for the duty fluctuation in advance, it is generally max.
It is up to about ± 30%, and if it exceeds the range, data cannot be detected (that is, X'and Y'cannot be distinguished and received data cannot be judged).

Although the effective distance of data transmission on the twisted pair transmission line is greatly influenced by the quality of the transmission line and the transmission speed, it is generally about 300 m (at 2 Mbps).
It is believed that.

However, the data detection in the transmission line I / F section 16 of the transmission line branching device 4 described above → the other port transmission line I / F
The process of waveform propagation of the output of the F unit 16 is as shown in FIG. 4, but it only outputs the detection data as it is and does not have a correction means for fluctuations in the detection duty. Therefore, in this system which adopts the token passing method, the transmission distance is greatly restricted. If the transmission distance limit of about 300 m described above is quoted, in the system of FIG. 5, considering the transmission between the car and the car, the hoistway length is max 150 m. Reproducibility accuracy in the transmission line branching device 4 (actually, since the reception signal 19 is sampled by the clock signal 23 to create the transmission signal 20, there is a reproducibility difference of one clock), safety factor, etc. When examined, the realization of the system with the current configuration is about 2 stories high.
It will be on the 5th floor (25th floor), and in recent years the building has become taller,
Considering the remote installation of the monitoring room due to decoding, it is extremely
I have to say that the specifications are halfway.

Therefore, the present invention provides an elevator information transmission device which can contribute to the improvement of the transmission quality between the nodes and can also increase the transmission distance, thereby significantly improving the versatility of the system. The purpose is to do.

[0017]

In order to achieve the above object, the invention corresponding to claim 1 is at least an elevator control device and various control devices such as a car information control device, a hall information control device and an external control device. A serial transmission line with a twisted pair cable arranged between one and
It has a transmission line branching device provided in the middle of this serial transmission line, and phase-modulates various information signals represented by time data, message data, control operation data, car and hall status data, external input data, etc. In an elevator information transmission device that performs serial transmission according to the method, when the data transmission is relayed to the transmission line branching device, the disturbance of the captured detection waveform due to the waveform distortion or the like on the transmission line is corrected, and then the transmission line is returned to the other side transmission line. It is an information transmission device for an elevator, characterized in that it is provided with means for sending out.

In order to achieve the above object, the invention according to claim 2 is arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device and an external control device. It has a serial transmission line with a twisted pair cable installed, and a transmission line branching device provided in the middle of this serial transmission line, and has time data, message data, control operation data, car and hall status data, external input data, etc. In an information transmission device of an elevator that serially transmits various information signals typified by 1), the transmission path branching device captures data from the serial transmission path or sends data to the transmission path. The transmission line interface part and the rising edge of the waveform captured by this transmission line interface part An edge detection circuit for outputting, a clock for data sampling, a sampling timer circuit for capturing a detection signal and a clock signal by the edge detection circuit, and creating a reference timing signal for sampling the captured data, and this sampling timer circuit An information transmission apparatus for an elevator, comprising a buffer for correcting a waveform captured by the transmission path interface unit using a reference timing signal provided by the above.

In order to achieve the above object, the invention according to claim 3 is arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device and an external control device. It has a serial transmission line with a twisted pair cable installed, and a transmission line branching device provided in the middle of this serial transmission line, and has time data, message data, control operation data, car and hall status data, external input data, etc. Various information signals represented by, in the information transmission device of the elevator that performs serial transmission by the phase modulation method, the transmission line branching device and the intermediate cable relay section in the transmission line of the transmission line branching device and the car information control device, When relaying data transmission, after correcting the disturbance of the captured detection waveform due to waveform distortion etc. on the transmission line, Means for delivering to degrees counterpart transmission path is a information transmission device for an elevator, characterized in that provided respectively.

In order to achieve the above object, the invention according to claim 4 is arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device and an external control device. It has a serial transmission line with a twisted pair cable installed, and a transmission line branching device provided in the middle of this serial transmission line, and has time data, message data, control operation data, car and hall status data, external input data, etc. Various information signals represented by, in the information transmission device of the elevator that performs serial transmission by the phase modulation method, the transmission line branching device and the intermediate cable relay section in the transmission line of the transmission line branching device and the car information control device, In the intermediate cable relay section in the middle of the hoistway, capture of data from the serial transmission path or on the transmission path , A transmission line interface section for transmitting the data, an edge detection circuit for detecting the rising edge of the waveform captured by the transmission path interface section, a data sampling clock, and a detection signal and a clock signal for the edge detection circuit. A sampling timer circuit that creates a reference timing signal for sampling the captured data, and a buffer that corrects the captured waveform by the transmission path interface unit using the reference timing signal provided by the sampling timer circuit. It is an elevator information transmission device.

[0021]

According to the invention according to claim 1 or 2, when the data transmission is relayed, the disturbance of the acquisition detection waveform due to the waveform distortion or the like on the transmission line is corrected, and the data is sent again to the transmission line on the other side. This contributes to the improvement of transmission quality and reduces the possibility of system down due to transmission error, and at the same time increases transmission distance without adding a modem IC, lowering the transmission speed, or changing the CPU software. Can be realized.

According to the invention corresponding to claim 3 or claim 4, in addition to the operation of claim 1 or 2, a special transmission of an optical cable or the like to a further higher-rise elevator, for example, a hoistway length of 300 m class. It does not require a medium and can be handled.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a transmission line branching device of a first embodiment of the present invention.
The / F section 16 (16) is shown with two ports. This embodiment is characterized in that the transmission line branching device is provided with a means for correcting the disturbance of the captured detection waveform due to the waveform distortion on the transmission line at the time of relaying the data transmission, and then sending it to the other side transmission line again. The above will be described in detail below.

The transmission line using the twisted pair cable is a transmission line terminating resistor 15 (this resistance is a termination process for making the transmission line appear to be infinite at infinity as viewed from the other node,
It is connected to the transmission line I / F 16 in response to a countermeasure for preventing reflection of the propagation waveform.

The transmission line I / F 16 converts the transmission waveform into a 1.0 control signal and outputs it as a reception signal 19. The carrier detection circuit 18 constantly monitors the reception signal 19 and outputs the output control signal 21 when detecting the data reception. The output control signal 21 is a transmission path I / F other than the one being received (other side).
When the transmission line I / F 16 input to (16) detects the output control signal 21, the transmission line I / F 16 prohibits data reception from the transmission line. By this action, when a certain transmission line I / F 16 is receiving data, the other port does not accept the received data, and the relay data is garbled due to the mixed data of a plurality of ports.
Avoiding system down. The configuration described above is
This is the same as the conventional example of FIG.

Next, the points to be described are different from the conventional example of FIG. That is, the edge detection circuit 25 that detects the rising edge of the received signal 19 and the edge signal and the clock signal 23a by the edge detection circuit 25 are input to receive the received signal 1
The sampling timer circuit 26 for creating the timing correction signal 27 for duty correction of No. 9 and the buffer IC 28 for taking in the timing correction signal 27, correcting the received signal 19 and re-outputting it as the transmitted signal 20 are newly added. Has been added.

The operation and effect of this embodiment having the above-described structure will be described below.
For convenience, the transmission rate is defined as 2 Mbps, and the number of clocks of the data sampling clock (OSI) 22a is 40.
It is defined as MHz.

When the edge detection circuit 25 detects the rising edge of the received signal 19, the sampling timer circuit 2
An edge signal (used for resetting the clock count inside the timer circuit) is output to 6. When the sampling timer circuit 26 receives an edge signal,
Start timer sampling.

The original 1-level signal output time of the received signal 19 should be 0.25 us or 0.5 us, which is the clock signal 23 generated by the OSI 22a.
Converted to the number of pulses of a, 10 pulses and 20 pulses, respectively
It becomes a pulse.

In this embodiment, the 1-level output time of the reception signal 19 is compared with the number of pulses of the clock signal 23a, so that the output time is 0.25 us, 0.5 u.
The duty of the data is corrected by correcting any of the values.

In this embodiment, if the 1-level output time of the received signal 19 is 15 pulses or less in terms of the number of pulses of the clock signal 23a, it is considered that 10 pulses (0.25 us) were output, and 15 pulses are output. If the pulse or more, 20
Judging that there was a pulse (0.5us) output,
The transmission signal 20a is reproduced with an output having a time width adapted to it.

To this end, the sampling timer circuit 26
Detects an edge signal, resets the timer circuit 26 and starts counting from the beginning. Timing correction signal 2
7 is the fifth pulse from the sampling timer circuit 26, 2
The edge is output at the 5th pulse.

Buffer IC (general-purpose logic IC) 28
Is the reception signal 19 triggered by the timing correction signal 27.
The output level of is transmitted to the transmission signal 20a. According to this embodiment, if the 1-level output time of the input reception signal 19 is 15 pulses or less (5 pulses or more) in terms of the number of pulses of the clock signal 23, 5 pulses of the timing correction signal 27 are used as the transmission signal 20a. 10 pulses from the eye to the 15th pulse will be output.

If the 1-level output time of the input reception signal 19 is 15 pulses or more (25 pulses or less) in terms of the number of pulses of the clock signal 23a, the transmission signal 20a is from the 5th pulse of the timing correction signal 27. 20 pulses are output up to the 25th pulse.

A timing diagram for this operation is shown in FIG. With the above configuration, the transmission line branching device 4
In addition to the conventional branching and reproduction of detected data, is improved in terms of waveform quality and can contribute to the improvement of transmission quality between nodes.

Further, by this, the transmission distance can be increased, and if the above-mentioned transmission distance of max 300 m is quoted, it can be applied to a property with a hoistway length of about 280 m and floors of 50 floors or more, which is a general-purpose system. Sex is significantly improved.

Incidentally, the sampling timer circuit 26 described in the present embodiment can be easily configured by a general-purpose counter IC such as 4060 + logic IC, and the buffer IC 2
8 is also sufficiently compatible with a flip-flop standard IC such as 273. Therefore, this embodiment is effective because it can realize its function at a very low cost.

The present invention is not limited to the embodiments described above,
For example, it may be configured as follows. In the above-described embodiment, the transmission line branching device 4 shown in FIG. 5 is improved as shown in FIG. 1. In addition to this, in addition to this, the transmission line branching device 4 and the car information control device 6a in the middle of the hoistway 11 of FIG. The intermediate cable relay units 12a and 12b in the transmission lines 6b and 6b may have the same configuration as in FIG. By doing so, it is easy to apply it to, for example, a hoistway relay of an ultra-high-rise elevator. In this case, the circuit as it is in FIG. 1 may be used, and for example, the substrate size can be realized with about 10 cm × 15 cm.
0m class) can be supported without requiring a special transmission medium such as an optical cable.

[0039]

According to the information transmission device for an elevator of the present invention, the relay of data transmission is performed to the transmission line branching device or the transmission line branching device and the intermediate cable relaying part in the transmission line of the transmission line branching device and the car information control device. At this time, since the disturbance of the captured detection waveform due to the waveform distortion on the transmission line is corrected and then sent out to the other side transmission line, it can contribute to the improvement of the transmission quality between each node and the transmission distance. It is possible to increase the number, and the versatility of the system can be significantly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a transmission line branching device of an embodiment of an elevator information transmission device according to the present invention.

FIG. 2 is a diagram for explaining the operational effects of the transmission path branching device of FIG.

FIG. 3 is a block diagram showing a configuration of a transmission path branching device as an example of a conventional elevator information transmission device.

FIG. 4 is a diagram for explaining the operational effect of the transmission path branching device according to FIG. 3;

FIG. 5 is a conceptual diagram of an elevator information transmission device.

6 is an explanatory diagram of twisted pair transmission of FIG.

[Explanation of symbols]

1 ... Central information control device, 2 ... Elevator control device, 3 ...
Elevator control device I / F, 4 ... Transmission line branching device, 5 ...
Elevator car, 6 ... Car information control device, 7 ... Information transmission line, 8 ... Tail code, 9 ... External control device, 10 ... Elevator machine room, 11 ... Hoistway, 12 ... Hoistway intermediate JT,
13 ... Elevator hall information control device, 15 ... Transmission line terminal resistance, 16 ... Transmission line I / F, 17 ... Delay circuit, 18 ...
Carrier detection circuit, 19 ... Received signal, 20, 20a ... Transmitted signal, 21 ... Output control signal, 22, 22a ... OSI,
23, 23a ... Clock signal, 25 ... Edge detection circuit,
26 ... Sampling timer circuit, 27 ... Timing correction signal, 28 ... Buffer IC.

Claims (4)

[Claims] 1. A serial transmission line using a twisted pair cable arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device, and an external control device, and this serial transmission. It has a transmission line branching device installed in the middle of the road, and serializes various information signals represented by time data, message data, control operation data, car and hall status data, external input data, etc. by phase modulation method. In an information transmission device for an elevator that performs transmission, means for correcting the disturbance of a captured detection waveform due to waveform distortion or the like on the transmission line at the time of relaying the data transmission to the transmission line branching device, and then sending it to the other side transmission line again. An information transmission device for an elevator, comprising: 2. A serial transmission line using a twisted pair cable arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device, and an external control device, and this serial transmission. It has a transmission line branching device installed in the middle of the road, and serializes various information signals represented by time data, message data, control operation data, car and hall status data, external input data, etc. by phase modulation method. In an elevator information transmission device for transmission, the transmission line branching device receives a data from a serial transmission line and / or outputs a data to the transmission line, and a waveform captured by the transmission line interface unit. Edge detection circuit that detects the rising edge of Using a lock, a sampling timer circuit that captures a detection signal and a clock signal by the edge detection circuit, and creates a reference timing signal for sampling the captured data, and a reference timing signal provided by the sampling timer circuit, An elevator information transmission device including a buffer for correcting a waveform captured by the transmission line interface unit. 3. A serial transmission line using a twisted pair cable arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device and an external control device, and the serial transmission line. It has a transmission line branching device installed in the middle of the road, and serializes various information signals represented by time data, message data, control operation data, car and hall status data, external input data, etc. by phase modulation method. In an information transmission device for an elevator that performs transmission, the transmission line branching device and an intermediate cable relay section in the transmission line of the transmission line branching device and the car information control device, when relaying data transmission, capture by waveform distortion or the like on the transmission line A means for correcting the disturbance of the detected waveform and sending again to the other party's transmission line is provided. Elevator information transmission apparatus according to claim. 4. A serial transmission line using a twisted pair cable arranged between an elevator control device and at least one of various control devices such as a car information control device, a hall information control device, and an external control device, and this serial transmission. It has a transmission line branching device installed in the middle of the road, and serializes various information signals represented by time data, message data, control operation data, car and hall status data, external input data, etc. by phase modulation method. In an elevator information transmission device that performs transmission, the transmission line branching device and an intermediate cable relay part in the transmission line of the transmission line branching device and the car information control device, an intermediate cable relay part in the middle of a hoistway, from a serial transmission line With a transmission line interface unit that takes in the data of or sends the data to the transmission line. An edge detection circuit that detects the rising edge of the waveform captured by the transmission path interface unit, a clock for data sampling, a detection signal and a clock signal by the edge detection circuit are captured, and a reference timing signal for sampling the captured data is obtained. An elevator information transmission device comprising: a sampling timer circuit to be created; and a buffer for correcting a waveform captured by the transmission path interface unit using a reference timing signal provided by the sampling timer circuit.