KR940000652B1 - Elevator synchro-position detecting circuit - Google Patents

Abstract

The elevator absolute sync. position detecting circuit in an elevator position detecting circuit for controlling a chip selection of a first parallel data adapter in response to an output signal of a first decoder for decoding an address signal of a first CPU, connecting a data bus between the first parallel data adapter and first CPU as well as a data bus between the first parallel data adapter and a second parallel data adapter, controlling a chip selection of the second parallel data adapter, a timer and a RAM connected to a backup battery by means of an output signal of a second decoder to receive/supply the data from them includes a decoder for decoding the address signal of the first CPU, magnet switches for generating a signal in accordance with the position of an elevator, and signal input ports subjected to the chip selection control by an output signal of the third decoder for receiving output signals from the magnet switches to supply the inputs to the first CPU.

Description

Absolute Synchronous Position Detection Circuit of Elevator

1 is a conventional elevator position detection circuit diagram.

2 is an absolute synchronization position detection circuit diagram of an elevator according to the present invention.

3 is a control flowchart executed by FIG.

* Explanation of symbols for main parts of the drawings

1,5: Central processing unit 2,6,10: Decoder

3,4: Parallel data adapter 7: Timer

8: RAM 9: Backup Battery

11,12: Signal input port MS ₁ , MS _n : Magnet switch

The present invention relates to an elevator position detection device, and more particularly, to an elevator absolute synchronous position detection circuit suitable for carrying out normal operation by determining the exact position of the elevator when the power is restored again by an emergency stop during power failure.

In general, the microcomputer control elevator counts the number of output pulses of the rotary encoder and detects the position of the elevator by the number of pulses. If a power failure occurs during operation, the number of encoder pulses at the time of power failure is stored in the data storage RAM, and when the power is restored, the data of the RAM is read and the value is determined as the current elevator position.

However, depending on the speed, weight and direction of the elevator at the time of power failure, the slip distance at the time of emergency stop may be somewhat different from the distance calculated by the number of pulses of the encoder in the microcomputer and malfunction of the integrated circuit (IC) when the power is turned off. Incorrect data value can be stored in RAM. If the actual position of elevator and the position value calculated by micom are more than one floor due to slippage in case of power failure, elevator will operate abnormally as much as this error. If the correct position is detected by the front and rear magnetic sensor input signal, and there is an error in the position value calculated by the microcomputer, it is necessary to correct this error so that normal service can be performed.

In the related art, in the related art, as shown in FIG. 1, the address bus of the first central processing apparatus 1 is connected to the first decoder 2 so that the chip can be selected by a designated address for each element. The signal line corresponding to the output line part of the decoder 2 is connected to the chip select terminal CS of the first parallel data adapter (hereinafter, referred to as a first adapter).

The data bus of the first central processing unit 1 is connected in series to the chip select terminal CS of the first adapter 3, respectively, and the data bus of the first central processing unit 1 is connected to the signal input port ( It is connected in series with the data lines 11 and 12, respectively, so that data can be transferred between the first adapter 3 and the second adapter 4, respectively.

Meanwhile, the second central processing apparatus 5 controls the timer 7 and the RAM 8 through the second decoder 6 and transmits and receives data with the second adapter 4. The RAM 8 is configured to be powered by an emergency by the backup battery 9.

Referring to the operation and problems with respect to the conventional circuit configured as described above in detail as follows.

First, during normal operation of the elevator, an output pulse is generated from the rotary encoder according to the rotational speed of the motor. Among the output pulses, the output pulse is input to the timer 7 by the ground signal Φ B and the timer is input by the input pulse Φ B. (7) starts counting, and every second the second processor 5 outputs an address to chip select the timer 7, it is decoded and output through the second decoder 6, and this signal is The chip 7 is chip-selected to be enabled.

At this time, the second central processing apparatus 5 reads the count value of the timer 7 and adds and subtracts the advice position data value of the second central processing apparatus 5 to determine the actual elevator position based on the result value. For example, when the elevator goes up when the data value of the second central processing unit 5 is almost 0 when the elevator is at the lowest floor, the output pulse value of the encoder is The counting is continued, and the second central processing unit 5 reads the count value of the timer 7 and adds it to the data value of the second central processing unit 5, indicating that the elevator is at some position on the lowest floor. On the contrary, when descending from the uppermost floor, the second central processing apparatus 5 has accumulated and accumulated advice position data, and the timer 7 restarts from the beginning. During the descent operation, the count value of the timer 7 is read and the accumulated advice position data value of the second central processing unit 5 is subtracted to detect that the elevator is located at the lowermost level. do.

Therefore, when the elevator descends or climbs, it is possible to detect the actual elevator position by adding or subtracting the count value of the output pulse of the encoder to the advice position data value accumulated in the second central processing unit (5). If a power failure occurs during operation, all data values are cleared, so even if the power is restored, there is no advice position data value, so the actual elevator position cannot be determined.

Therefore, in case of power failure, it is necessary to remember the advice position data value by the number of pulses of the encoder until the power is restored. In case of power failure, the advice position data value is stored in the RAM (8) and the backup battery (9) until the power is restored. The hardware is configured so that the data value of the RAM 8 can be kept continuously. When the power is restored, the second central processing unit 5 reads the advice position data value stored in the RAM 8, The service will continue by detecting the value as the actual location of the elevator.

However, the above-described method does not have any abnormality in hardware during power outage and the slip distance of the elevator is exactly reminiscent of the emergency stop, so if there is no error in the actual stop position of the elevator and the advice position data by the second central processing unit 5, Although there is no problem, during the power failure, the second central processing apparatus 5 may malfunction, and the slip distance at the time of emergency stop is different depending on the weight, speed, and direction of the elevator.

Due to this factor, if the actual elevator position and the advice position data value stored in the RAM 8 have an error of more than one floor, when the power recovery is completed and the service is performed, abnormal service as much as this error is performed, thus serving as an elevator. You will not be able to perform it properly.

The present invention, in view of the problems of the conventional elevator circuit as described above, if the correct position of the elevator is detected by the magnetic sensor input signal, and if there is an error in the position calculated by the microcomputer to correct this error, the invention can be carried out to perform the correct service If it is described in detail with reference to the accompanying drawings as follows.

2 is an elevator absolute synchronous position detection circuit diagram of the present invention. In addition to the circuit of FIG. 1, as shown here, an address line is connected in series with a third decoder 10 to the first central processing apparatus 1, The output of the third decoder 10 is connected in series to the chip select terminals CS of the corresponding signal input ports 11 and 12 so that the signal input ports 11 and 12 can be selected by the designated address signals. The data buses of the first central processing unit 1 are connected in parallel to match the data lines of the signal input ports 11 and 12, respectively, and the magnetic switch MS ₁ to the signal input ports 11 and 12 are connected to each other. MS _n ) Connect each contact and input terminal so that 8 contacts are connected, and the other terminals of the magnetic switches MS ₁ to MS _n are commonly connected to the power supply VDD.

The operation and effect of the circuit of the present invention configured as described above will be described in detail with the control flowchart of FIG. 3 as follows.

There are two kinds of emergency stops in the case of an error while driving and a power outage.In order to restart the vehicle after stopping, it is necessary to first determine which emergency stop is caused by an error. If it is an emergency stop due to a power outage, it is determined whether the elevator stop position is at the landing level. If the stop position is out of the landing level, low-speed rescue operation is performed to the landing level to check the synchronous position. Do this.

When the elevator arrives at the level of landing, the operation signal of the magnetic switch MS ₁ to MS _n is read in order to confirm the synchronous position. First, the first central processing unit 1 performs the switching of the switches MS ₁ to MS _n . An address for reading the contact signal is output, and the output signal for this address is decoded through the third decoder 10 and input to the chip select terminals CS of the signal input ports 11 and 12 to receive the signal input port. (11,12) is enabled.

At this time, the magnetic switch (MS ₁ ~ MS _n ) contact operation signal is transmitted to the first central processing unit (1) through a data bus, the position of the elevator can be determined by searching the bits of the signal, for example The first magnet switch MS ₁ is mounted on the first floor, and the nth magnet switch MS _n is mounted on the n floor, and the signal input ports 11 and 12 output a high level signal to the input power supply VDD. Assuming that the first central processing unit 1 determines that the magnetic switches MS ₁ to MS _n of the corresponding bits have been operated on the bits that are low in the read data value, the position detection of the elevator is as follows. can do.

That is, if the elevator arrives at the concept level after the power recovery, the second magnet switch MS ₂ is operated, and the magnet switch MS ₂ is a B contact, and thus the contact is opened, and the input terminal is Since the power supply voltage VDD cannot be input, the input signal from the magnet switch MS ₂ provided on the second floor becomes low level and is input to the signal input port 11, so that the first central processing apparatus 1 receives the signal. When the signals of the input ports 11 and 12 are read, all the bits except the 1 bit become high level. Since the 1 bit corresponding to the data on the 2nd floor is low level, the first central processing unit 1 has an elevator on the 2nd floor. Will be determined to

And when reading the magnetic switch (MS ₁ ~ MS _n ) contact point, if there is no input signal or two or more input signals, the magnet sensor is broken or there is a problem in the hardware that inputs this signal. The return operation to.

If there is no abnormality in the input signal, the static layered data is created from the data values by the signal input ports 11 and 12, and the data is transmitted to the second central processing apparatus 5 through the adapters 3 and 4.

When this operation is completed, the service is searched for the presence of parts, and if there is a part, service is performed for the call.

Therefore, the sensor is mounted on each floor so that the magnetic switch (MS ₁ ~ MS _n ) can operate when the elevator stops at each floor level.If the power is restored, first determine the cause of the emergency stop, If it is not stopped, the routine according to the error processing is executed, and if it is an emergency stop due to a power failure, when the low-speed rescue operation is performed to the conception level and arrives at the conception level, the first central processing apparatus 1 receives the third decoder ( 10) select the signal input ports (11, 12) to read the B contact signal of the magnet switch (MS ₁ ~ MS _n ) and determine the stop position of the current elevator. At this time, only one B contact operation signal of the magnet switch (MS ₁ ~ MS _n ) should be one. If there are two or more B contact signals, there is an error in the magnet switch (MS ₁ ~ MS _n ) or the hardware reading the input signal. The reference floor return operation is performed at low speed. If the input signal is normal, the first central processing unit 1 writes data on the stationary floor and stops the second central processing unit 5 through the adapters 3 and 4. It performs the process of transmitting the data on the layer and correcting the layer signal data by the data on the stationary layer. Then, it checks whether there is a calling and performs the service of the calling if there is no calling. By performing the reference floor return operation, even if a power failure occurs, when the power is restored, the correct position of the elevator is detected by the input signal of the hardware. Normal service can be performed.

In addition, if there is a lot of non-stop floors and the section is long, if the emergency stop is made in this section, the low-speed rescue operation time will be extended to the nearest service floor, and the service efficiency of the elevator will be considerably reduced. By correcting the accurate synchronization signal by the high speed can be started even in the non-stop section, it is possible to increase the service efficiency of the elevator.

Claims (1)

The chip selection of the first parallel data adapter 3 is controlled by the output signal of the first decoder 2 which decodes the address signal of the first central processing apparatus 1, and the first parallel data adapter 3 and the first parallel data adapter 3. The second central processing apparatus connects a data bus between the first central processing apparatus 1, and also connects a data bus between the first parallel data adapter 3 and the second parallel data adapter 4. The chip and the data of the second parallel data adapter 4, the timer 7 and the RAM 8 are controlled by the output signal of the second decoder 6 which decodes the address signal of (5). Input / output and a position detection circuit of an elevator having a backup battery 9 connected to the ram 8, wherein the address signal of the first central processing apparatus 1 is decoded when the elevator position is detected. According to the position of the three decoder 10 and the elevator generates a signal accordingly The network switch (MS ₁ ~ MS _n) and the third decoder 10 receives a chip select controlled by the output signal receives the output signal of the magnet switch (MS ₁ ~ MS _n), the first central processing of Elevator absolute synchronization position detection circuit, characterized in that it comprises a signal input port (11, 12) applied to the device (1).