JPH07206299A - Safety signal transmitting system for elevator - Google Patents

Abstract

PURPOSE:To provide a safety signal wireless transmitting system by which transmission of a signal and operation and control of an elevator can be carried out without damaging any safety of the elevator. CONSTITUTION:A safety device signal inputting circuit 2 and a wireless transmitter 1 transmitting only the carrier wave are provided on a car side. The wireless transmitter 1 normally transmits the carrier wave and is controlled so as to stop the transmission of the carrier wave when action of a safety device is detected. A receiver 21 receiving the carrier wave is provided on a machine room side, and a microcomputer 22 for communication outputs a signal to an elevator control device 48 so that it stops the elevator. A transmission path for a safety device signal carrying out signal transmission in a car cage safety device constructed in this way is arranged independently of a transmission path for general device output. In this way, an operating condition of the safety device is transmitted only by on/off of the wireless carrier wave, and no information is provided in the wireless signal, so that highly reliable transmission can be carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal transmission system between an elevator car and a machine room, and particularly when transmitting a signal between the car and the machine room using a wireless transmission path. Related to the safety equipment signal transmission system of elevator.

[0002]

2. Description of the Related Art As a conventional technique for transmitting a signal between a car and a machine room using a wireless transmission path, for example, a technique described in Japanese Patent Laid-Open No. 63-300804 is known. .

According to this prior art, an antenna having a sharp directivity with respect to the passage of the car is attached to a machine room installed at the top of a hoistway where the car moves up and down, and the car has a wide beam width. An antenna is installed, these antennas are opposed to each other, and a signal in which all the signals necessary for controlling the movement of the car by radio signals are superimposed is transmitted and received bidirectionally.

With the above-mentioned prior art, a cableless elevator can be realized by eliminating the control cable between the car and the machine room.

[0005]

The above-mentioned prior art is to carry out signal transmission using a wireless transmission line, but no consideration is given to what kind of signal transmission system is specifically constructed. In particular, it does not specify how the car safety device signal transmission system and transmission method are performed, and there is a problem that further improvement is required to operate the elevator safely. .

That is, the above-mentioned prior art relates to the safety of what kind of signal transmission processing is performed when the safety device of the car operates, and how the elevator is operated and controlled to ensure the safety of passengers. It was not considered.

An object of the present invention is to solve the above-mentioned problems of the prior art, and in an elevator system for wirelessly transmitting a signal between a car and a machine room, the signal transmission and the elevator can be performed without impairing the safety of the elevator. An object of the present invention is to provide a wireless safety device signal transmission method for an elevator, which is suitable for use in controlling operation.

[0008]

According to the invention, said object comprises a safety device signal input circuit for a car and a radio transmitter for transmitting only a carrier wave, and a receiver for receiving said carrier wave in a machine room. , Configure a safety device signal transmission line that performs signal transmission of a car safety device using these devices, and use this safety device signal transmission line to change the operating state of the safety device to a wireless carrier wave. This is achieved by sending only by sending and stopping.

Further, the purpose is to detect the presence or absence of a carrier wave transmitted from the transmitter by the receiver provided in the machine room,
This is achieved by the elevator control device taking in this detection signal and controlling the operation of the elevator based on this detection signal.

Further, the above-mentioned object is achieved by independently providing a safety device signal transmission line for transmitting signals of a safety device of a car and a general device signal transmission line for transmitting signals of other devices. It

[0011]

The safety device signal input device provided in the car monitors the operating state of the safety device of the car, and if the safety device is not operating, sets the wireless transmitter to the transmitting state to transmit the carrier wave and When the device operates, the wireless transmitter is immediately stopped and the carrier wave transmission is stopped.

On the other hand, the radio receiver installed in the machine room is
It constantly receives the wireless carrier wave from the wireless transmitter, detects that the carrier wave transmission is stopped, and outputs a detection signal. This output signal is transmitted to the elevator control device. Thus, the elevator control device determines that the safety device has operated and immediately performs operation control such as stopping the elevator.

Further, since the safety device signal transmission line and the general device signal transmission line are provided independently of each other,
Signals can be transmitted independently of each other, and safety device signals can be transmitted with high reliability.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an elevator safety signal transmission system according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the construction of an elevator safety signal transmission system according to an embodiment of the present invention, FIG. 2 is a block diagram showing the construction of a radio transmitter, and FIG. 3 is a block showing the construction of a radio receiver. It is a figure. In FIG. 1, 1 is a wireless transmitter, 2 is a safety device signal input circuit, 4 is a communication microcomputer, 5 is a general / analog signal input circuit, 6 is a transmission line switching circuit, 8 and 9 are wireless modems, and 21 is wireless. Receiving machine,
22 is a communication microcomputer, 29 is a main circuit, 30 is a main motor, 32 and 33 are wireless modems, 34 is a transmission line switching circuit, and 48 is an elevator control device.

In the embodiment of the present invention shown in FIG. 1, a safety device signal input circuit 2 for taking in signals from the wireless transmitter 1, the stop switch 15, the door switch 15a, the safety switch 15b, etc. in the car, There is provided a car safety device signal transmission line constituted by a connection line 3 connecting the wireless transmitter 1 and the safety device signal input circuit 2.

Further, in the car, a communication microcomputer 4, a general / analog signal input circuit 5 for taking in signals from the driver's panel 16, a transmission line switching circuit 6, a wireless modem 8,
A car side general device signal transmission line constituted by 9 is provided. The transmission line switching circuit 6 is controlled by the communication microcomputer 4 via the control line 12, and connects the data transmission line 13 to one of the data transmission lines 13a and 13b for the wireless modems 8 and 9. Wireless modem 8, 9
Are installed in order to improve the reliability of the transmission path for general device signals, and these are controlled by the communication microcomputer 4 via the control lines 14 and 14a.

The safety device signal transmission line and the general device signal transmission line on the car side are connected to the connection line 7 for connecting the safety device signal input circuit 2 and the communication microcomputer 4, and the safety device signal input circuit 2. The general / analog signal input circuit 5 and the communication microcomputer 4 are connected by an address bus 10 and an address bus 11.

On the other hand, in the machine room, the communication microcomputer 22,
An elevator control device 48 including a safety device signal I / O 24, a DPRAM 25, a relay circuit 26, a CPU 27, and an I / O 28 is provided. This elevator control device 48 has DPRAM 25, PU 27 and I /
The O28s are connected to each other by an address bus 41 and a data bus 42.

The elevator operation control by the elevator controller 48 is performed by the CPU 27 and an I / O (not shown).
It is performed by controlling the main circuit 29 via the I / O 28 and the signal line 46 by the program stored in the ROM in the 28. Further, the main circuit 29 and the relay circuit 26 that receives the safety device signal are connected to the signal line 45.
Are connected by means of the signal line 45, and a signal for operating the safety device is received through the signal line 45 to control the stop of the car or the like. The car is driven by driving the main motor 30 via the control line 47 by the main circuit 29.

In the machine room, there is a radio receiver 21, a communication microcomputer 22, and a transmission line 23 for transmitting a detection signal from the radio receiver 21 to the communication microcomputer 22. A device signal transmission line and a general device signal transmission line on the machine room side, which includes the wireless modems 32 and 33, the transmission line switching circuit 34, and the communication microcomputer 22, are provided. The transmission line switching circuit 34 is
Controlled by the communication microcomputer 22 via the control line 35, the data transmission line 36 is connected to one of the data transmission lines for the wireless modems 32 and 33. Wireless modem 32, 3
Two units 3 are installed to improve the reliability of the general device signal transmission path, and these are controlled by the communication microcomputer 22 via the control lines 37 and 37a.

The communication microcomputer 22, the DPRAM 25 and the safety device signal I / O 24 in the elevator controller 48 are connected to the address bus 38 and the data bus 39.
Connected by.

As described above, in one embodiment of the present invention, the safety device signal transmission path includes the safety device signal input circuit 2, the communication microcomputer 4, the wireless transmitter 1, and the wireless receiver 2.
1. Composed of a communication microcomputer 22.

The safety device signal input circuit 2 includes a stop switch 15, a door switch 15a, and a safety switch 15.
It takes in switch signals such as b to monitor the operating condition of the car safety device. Then, the safety device signal input circuit 2 sends a transmission signal to the wireless transmitter 1 through the connection line 3 if the safety device is not operating, and the wireless transmitter 1
When the safety device operates, the wireless transmitter 1 is immediately controlled to stop via the connection line 3 to interrupt the transmission of the carrier wave. Further, the safety device signal input circuit 2 simultaneously transmits the operation of the safety device to the communication microcomputer 4 via the connection line 7.

On the other hand, the radio receiver 21 provided in the machine room is
When the carrier transmitted from the wireless transmitter in the car is constantly received and it is detected that the carrier has stopped transmitting, the detection signal is output. This detection signal is input to the interrupt signal terminal of the communication microcomputer 22 via the transmission line 23. Based on this detection signal, the communication microcomputer 22 determines that the car safety device has operated, interrupts the processing that has been performed up to that point, and performs the following processing with the highest priority.

That is, the communication microcomputer 22 outputs an elevator stop command to the relay circuit 26 via the safety device signal I / O 24 in the elevator control device 48. The relay circuit 26 causes the main circuit 2 to receive the stop command.
9 to control the main motor 30 to stop the car. In addition, the communication microcomputer 4 uses the address bus 1
Data indicating which safety device has operated from the safety device signal input circuit 2 via 0 and the data bus 11,
Transmission path switching circuit 6, wireless modem 8 and wireless modem 3
2, transmitting the data to the general device signal transmission line composed of the transmission line switching circuit 32 and the communication microcomputer 22,
The elevator control device 48 determines which safety device has operated.
Let me know.

As a result, the elevator control device 48
Can know what state the car is in, and can reliably perform the next operation control after the car is stopped.

Further, according to the embodiment of the present invention, by providing the signal line 7'shown by the dotted line in FIG. 1, even if the signal transmission of the general equipment signal transmission line is disturbed, the elevator control apparatus is provided. 48, car stop switch 1
5, it is possible to inform which safety device such as the door switch 15a and the safety switch 15b has operated.

That is, when the communication microcomputer 4 receives a report from the safety device signal input circuit 2 that a failure has occurred in the general device signal transmission line and that the safety device has operated, the communication device 4 receives from the safety device signal input circuit 2. Cage stop switch 1
5, a safety switch such as a door switch 15a, a safety switch 15b, and the like are taken in, and the wireless transmitter 1 which has stopped the transmission of the carrier signal by the connection line 3 is keyed and controlled to indicate the operated safety device. The carrier wave is intermittently transmitted.

The elevator control device in the machine room receives this signal from the communication microcomputer 22, and determines the operating state of the safety device of the car by signal transmission through the safety device signal transmission path by the intermittent period of the carrier wave or the like. I can know.

Therefore, if the safety device such as the stop switch 15 does not operate, the elevator control device can perform operation control such as stopping the elevator to the nearest floor, and confine passengers in the car. You can control the car so that there is no.

Next, the configuration and operation of the wireless transmitter 1 are shown in FIG.
Will be described with reference to. In FIG. 2, reference numeral 51 is an oscillation circuit for oscillating a carrier wave, 52 is a buffer circuit, 53 is a power amplifier circuit, 54 is a filter circuit, 88 is a keying circuit, 56 is a voltage level conversion circuit, 57 is a control signal, and 5 is a control signal.
8 is an antenna.

Safety device signal input circuit 2 to connection line 3
The voltage level of the control signal 57 sent via the voltage level conversion circuit 56 is converted and the control signal 57 is transmitted through the keying circuit 5.
Input to 5. The keying circuit 55 turns on the buffer circuit 52 if the control signal 57 from the safety device signal input circuit 2 indicates that one of the safety devices has operated.
Control to FF, and control to ON in other normal times. As a result, normally, the carrier wave from the oscillation circuit 51 passes through the buffer circuit 52, is amplified by the power amplification circuit 53, is filtered by the filter circuit 54 to remove unnecessary frequency components, and is then transmitted via the antenna 58.

Next, the configuration and operation of the wireless receiver 21 will be described with reference to FIG.
Will be described with reference to. In FIG. 3, 72 is an antenna,
60 and 63 are filter circuits, 61 is a high frequency amplifier circuit,
62 is a frequency conversion circuit, 71 is a local oscillation circuit, 64, 6
5 is an intermediate frequency amplification circuit, 66 is a detection circuit, 67 is a squelch circuit, 69 is a voltage level conversion circuit, and 70 is a detection signal.

The carrier wave transmitted from the radio transmitter 1 is received by the antenna 72, passes through the filter circuit 60, and is amplified to a proper signal level by the high frequency amplifier circuit 61. Thereafter, the received carrier wave is converted into a frequency that is easily amplified by the frequency conversion circuit 62 and the local oscillation circuit 71, passes through the filter circuit 63, and the intermediate frequency amplification circuits 64 and 65.
Is amplified by.

The amplified signal is detected by the detection circuit, becomes a DC signal, and is input to the squelch circuit 67. The squelch circuit 67 detects the magnitude of the received voltage of the high frequency output signal of the filter circuit 63, and if the received voltage is less than or equal to a set value, the output of the detection circuit is changed to a low frequency amplifier circuit 68 in the subsequent stage.
Work so as not to tell. As a result, noise below the set value is not detected, and malfunctions due to noise can be prevented. The set value can be adjusted. The voltage level of the signal output from the squelch circuit 67 is converted by the voltage level conversion circuit 69, and the detection signal 7
It is output as 0.

As described above, the radio receiver 21 receives the transmitted carrier wave, outputs the detection signal 70 when the received voltage level of the carrier wave is equal to or higher than a predetermined magnitude, and outputs the detection signal 70 at a predetermined magnitude or lower. If so, the detection signal 70 is not output. The communication microcomputer 22 transfers the detection signal 70 to the safety device signal I / O of the elevator control device 48.

As described above, according to one embodiment of the present invention, the operation status of the safety device is transmitted only by transmitting and stopping the wireless carrier wave, and since the wireless signal does not carry information, an error in data transmission is prevented. The safety device signal can be transmitted with high reliability without consideration.

Further, according to one embodiment of the present invention, since the exclusive safety device signal transmission path for transmitting the signal of the car safety device is provided, the operating condition of the safety device is immediately transmitted to the machine room without delay. And, even if the transmission path for the general equipment signal is disturbed, if the transmission path for the safety equipment signal is not obstructed, the operation status of the safety equipment of the car can be transmitted to the elevator control equipment. . As a result, the elevator control device can perform the rescue operation to rescue the passenger in the car.

In the above description of the operation of the embodiment of the present invention, the operation using the safety device signal transmission line is mainly described, but the operation using the general device signal transmission line is publicly known. Since it is the same as the one described above, detailed description is omitted.

[0041]

As described above, according to the present invention, the operation status of the safety device is transmitted only by transmitting and stopping the wireless carrier wave, and the wireless signal is not provided with information, so that an error in data transmission is taken into consideration. It is possible to perform a highly reliable transmission of the safety device signal without doing so.

Further, according to the present invention, since the exclusive safety device signal transmission path for transmitting the signal of the car safety device is provided, the operating condition of the safety device can be immediately transmitted to the machine room without delay. In addition, even if the transmission line for the general device signal is disturbed, if the transmission line for the safety device signal is not obstructed, the operating condition of the safety device of the car can be transmitted to the elevator explanation device.

Thus, according to the present invention, the elevator control device constitutes a highly reliable and safe radio signal transmission elevator system capable of performing rescue operation for rescue of passengers in the car. be able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an elevator safety signal transmission system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless transmitter.

FIG. 3 is a block diagram showing a configuration of a wireless receiver.

[Explanation of symbols]

 1 wireless transmitter 2 safety device signal input circuit 4 communication microcomputer 5 general / analog signal input circuit 6, 34 transmission line switching circuit 8, 9, 32, 33 wireless modem 21 wireless receiver 22 communication microcomputer 29 main circuit 30 main Motor 48 Elevator control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiromi Inaba 7-1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (72) Inventor Toshio Meguro 1070 Ige, Katsuta-shi, Ibaraki Hitachi, Ltd., Mito Plant (72) Inventor, Seinosuke Yahiro, 1070 Ichige, Katsuta City, Ibaraki Prefecture, Hitachi Ltd., Mito Plant, Hitachi, Ltd. (72) Inventor, Tsutomu Oka, 1070, Ige, Katsuta, Ibaraki Hitachi, Ltd. Mito Plant, Mfg. Co., Ltd. (72) Inventor Kenji Takahashi 1070 Ma, Katsuta City, Ibaraki Prefecture Hitachi, Ltd. Mito Plant

Claims (6)

[Claims] 1. An elevator safety signal transmission system for wirelessly transmitting a signal between a car and a machine room, wherein a safety device signal for a car is transmitted by transmitting and stopping a wireless carrier wave. Elevator safety signal transmission method. 2. The safety device signal transmission is performed by a safety device signal transmission line that is provided independently of a general device signal transmission line that transmits an operating state of a general device. Elevator safety signal transmission method described in 1. 3. The operation control for stopping the elevator to the nearest floor when the safety device signal transmission line is not obstructed and the general device signal transmission line is disturbed. Elevator safety signal transmission system. 4. The safety device signal transmission path receives a safety device signal input circuit provided in a car, a wireless transmitter for transmitting only a carrier wave, and a carrier wave provided in a machine room, 3. A wireless receiver configured to detect the presence or absence of a carrier wave and output a detection signal.
Or the elevator safety signal transmission method described in 3. 5. A radio receiver provided in the machine room,
When the carrier wave is always received and it is detected that the transmission of the carrier wave is stopped, the detection signal is transmitted to the elevator control device, and the elevator control device immediately stops the elevator according to the transmitted detection signal. The safety signal transmission system for an elevator according to claim 4, wherein operation control is performed. 6. The elevator safety signal transmission system according to claim 2, wherein the contents of the operated safety device are transmitted to the elevator control device through a general device signal transmission path.