JPH02305780A - Position detecting device of elevator - Google Patents

Abstract

PURPOSE:To reduce the burden of the upper level microcomputer side by providing a microcomputer for pulse counting to detect the position of an elevator from the pulse input signal from an input circuit and to memorize the data. CONSTITUTION:To the pulse signal from a pulse generator 4 which generates a pulse synchronous to the movement of an elevator, a microcomputer 18 for pulse counting carries out an operation process to detect the position of the elevator. Then, the resultant position detecting data is transmitted to a microcomputer for operation control at the upper level, and facilitates to carry out the necessary operation control of the elevator. And when a normal power source is stopped, a converting circuit 24 of the microcomputer power source gives the power source 23 from a time limit battery backup circuit 22 to the microcomputer 18 for pulse counting, to carry out the operation process to the pulse input signal from the pulse generator 4, and the result of the detecting process of the elevator position is stored in a memory 21.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an elevator position detection device.

(Prior Art) With the rapid progress and spread of microcomputer technology in recent years, microcomputers have come to be widely applied to control TG+ devices even in simple elevators.

When applying a microcomputer to the Elevator II II system, a semiconductor circuit was used to detect the position in place of the selector (mechanical detector that detects the position by reducing the movement of the elevator) that was conventionally used to detect the position. A detection method was adopted, in which a counter circuit counts pulse input signals from a pulse generator that generates pulse signals synchronized with elevator movement, and the count data is transmitted and input to a microcomputer as elevator position data. However, a configuration based on elevator operation is now being adopted.

FIG. 3 shows the circuit configuration of such a conventional elevator position detection device. 1 is an elevator car, 2 is a hoisting machine, 3 is a hoisting drive electric motor, 4 is a pulse generator that rotates in synchronization with the electric VJ machine 5, 5a and 5b are pulse signals emitted from the pulse generator 4, and 6 is these Input circuits for pulse signals 5a and 5b, 7a and 7b are pulse input signals, 8 is a counter circuit, 9 is a normal power supply, 10 is a memory backup battery, 11 is a battery/power supply switching circuit, and 12 is a battery backup power supply. .

Also, 13 is a counter data output signal, 14 is a counter data input bus buffer, 15 is a microcomputer pass line, and 16 is a data set bus buffer. , 17
is the count data set signal.

In this conventional elevator position detection device, an elevator car 1 is suspended by a hoisting machine 2, and an electric 1ls3
The electric motor 3 is controlled so that the car 1 reaches a predetermined floor.

A pulse generator 4 is directly connected to this electric motor 3 and generates a pulse signal in synchronization with the movement of the electric motor 3. That is, when the motor 3 rotates quickly, a large number of pulses are generated within a certain period of time, and when the motor 3 rotates slowly, the number of pulses decreases.

The pulse signals 5a, 5b generated in this way are given to a pulse input circuit 6 via a transmission line, where they undergo noise removal and waveform shaping, and are given to a counter circuit 8 as pulse input signals 7a, 7b. .

The counter circuit 8 is configured as a 16-bit counter by connecting a plurality of 4-bit counters in series, and further detects the driving direction based on the positional relationship of the pulse input signals 7a and 7b, By up-counting and down-counting the signals, the relative position of the elevator car 1 can be determined.

The data counted by this counter circuit 8 is outputted as a counter data output signal 13, and is inputted to a pass line 15 for an upper-level microcomputer (not shown) via a counter data buffer 14, and various signals are sent to the upper-level microcomputer. It is designed to perform arithmetic processing.

In addition, in order to initialize counter data during position adjustment, a data set path buffer 16 is connected to the microcomputer path line 15, and in order to set predetermined data on a predetermined floor such as the lowest floor, the counter circuit Counter data set signal @1 to the set terminal of 8
7 is connected. In other words, at the beginning of the adjustment,
The data of the counter circuit is undefined, and by setting data for a reference floor such as the lowest floor, the position of elevator car 1 is determined from the count value of the pulse input signal compared to this reference data. .

In such an elevator position detection device, it is necessary to maintain the data of the counter circuit 8 even during a power outage, and the normal power supply 9 is normally connected to the battery/power supply switching circuit 1.
0 to the counter circuit 8 via
Normally, when the voltage of the N source 9 becomes lower than a predetermined value,
The data memory is backed up by switching the battery/power supply switching circuit 11 to supply power from the memory backup battery 10 to the color converter circuit 8.

For example, the power supply 9 normally has a voltage of about 5V, but in the event of a power outage, a voltage power of about 2 to 3V is supplied from the memory backup battery 10 to the counter circuit 8, and the data in the counter circuit 8 is retained. I will do it.

(Problem to be Solved by the Invention) However, in such a conventional elevator position detection device, the pulse generated from the pulse generator is usually about 1 pulse per travel length of 1 to 1Q mm, In this case, a large number of pulses will be input, so a counter device of 16 bits or more is usually required as the counter circuit 8, and furthermore, in order to connect these with circuits such as a counter data input bus buffer and a data set path buffer. many signal lines etc. are required,
Furthermore, the counter circuit processes only the counter data and outputs it to the host microcomputer, so that the host microcomputer side displays the gauge bar of the operating floor, the needle bar of the floor that can be stopped, and the display of the operating floor. Since arithmetic processing is performed on the elevator 2, there is a problem in that a large burden is placed on the host microcomputer, which performs various processes necessary for controlling the operation of the elevator 2, such as data transmission. Additionally, a simple counter circuit cannot adequately judge the positional relationship of pulses, the rationality of count data, etc., and there is also the problem that it cannot provide sufficient backup for the important function of elevator position detection. .

His invention was made in view of these conventional problems, and by applying a microcomputer for pulse counting, it was possible to process a lot of data related to position detection, and this made it possible to process a lot of data related to position detection. Elevator position detection that reduces the circuit component configuration for data transmission and reception with the microcomputer, further reduces the burden on the host microcomputer, and provides sufficient backup for the elevator position detection function. The purpose is to provide equipment.

[Structure of the Invention] (Means for Solving the Problems) The elevator position detection device of the present invention includes a pulse generator that generates pulses synchronized with the movement of the elevator, and an input circuit for the pulse signal generated by the pulse generator. , a pulse counting microcomputer that detects the position of the elevator based on the pulse input signal from this input circuit, and stores the data; this pulse counting microphone 1; a data transmission interface circuit for transmitting data to the operation control microcomputer to be executed, and transmitting data from the operation control microcomputer to the pulse counting microcomputer; and a normal power supply circuit for the pulse counting microcomputer. A power supply and memory backup battery, a battery/power supply switching circuit for these, and a power supply voltage for maintaining the normal power supply voltage for a certain period of time when the power supply voltage supplied from the battery/power supply switching circuit to the pulse counting microcomputer decreases. and a microcomputer power supply switching circuit that switches the output of the battery/power supply switching circuit and the limited time battery circuit to supply the output to the pulse counting microcomputer.

(Function) In the elevator position detection device of the present invention, the pulse counting microcomputer performs arithmetic processing on the pulse signal from the pulse generator that generates pulses synchronized with the movement of the elevator, thereby detecting the elevator position. I can do it.

The position detection data obtained by the arithmetic processing of the pulse counting microcomputer is transmitted to the upper-level operation control microcomputer and can be used for necessary elevator operation control.

As a power supply circuit for the pulse counting microcomputer, during normal operation, normal power is supplied from the normal power supply via the battery power supply switching circuit and the microcomputer power switching circuit, but when the normal power supply is stopped, , the microcomputer power supply switching circuit supplies power from the time-limited dispersion circuit to the pulse counting microcomputer, performs arithmetic processing on the pulse input signal from the pulse generator until the elevator stops at a predetermined floor, and calculates the elevator position detection processing result. store in memory.

After the elevator has completely stopped and the position detection data corresponding to the elevator's stopped floor has been stored in the memory, the microcomputer power switching circuit is switched to the memory backup battery side in the battery/power switching circuit. Power is supplied from the battery to the pulse counting microcomputer to back up this memory data.

Therefore, when the power outage is restored, the pulse counting microcomputer has secured the position data for the floor where the elevator is stopped, and smooth position detection operation can be resumed even when the elevator is restarted.

(Example) Below are the 11 fruits of this invention! An example will be explained in detail based on the diagram.

FIG. 1 shows an embodiment of the present invention, and the same parts as the circuit configuration shown in FIG. 3 of the conventional example are given the same reference numerals and explained.

In other words, 1 is an elevator car, 2 is a hoisting machine, 3 is a hoisting machine drive #J electric motor, and 4 is a pulse generator that generates a pulse signal in synchronization with the rotation of the hoisting machine drive *N motor 3.
The pulse input circuit 6 removes noise from the pulse signals @5a, 5b from the pulse generator 4, performs waveform shaping, creates pulse input signals 7a, 7b, and supplies them to the microcomputer 18 for pulse counting.

The microcomputer 18 is equipped with an oscillator 19,
It operates according to the frequency of this oscillator 19, counts the elevator position based on the pulse input signals 7a and 7b using an internal counter, and performs various arithmetic operations to determine the floor of the elevator and the floors where it can be stopped. 16 for calculating floor etc. and displaying position data.
Arithmetic processing data is written into the output memory 21 in both directions via the data input/output bus line 20.

A microcomputer pass line 15 for a higher-level elevator operation control microcomputer (not shown) is connected to this bidirectional input/output memory 21, and necessary data can be read and read by access from the higher-level microcomputer. is now possible.

As a power supply circuit for the pulse counting microcomputer 18, a battery/power supply switching circuit 11 for the normal power supply 9 and the memory backup battery 10;
A battery backup power supply 12 from this battery/power supply switching circuit 11 and a limited time battery backup circuit 22
a microcomputer power supply switching circuit 24 for switching between the limited time battery power supply gi 23 and the normal power supply 9 connected to the time limited battery backup circuit 22;
The second battery 25 is provided with a second battery 25 that can provide a voltage equal to the voltage. The microcomputer power supply 26 from this microcomputer power supply switching circuit 24 is input to the pulse counting microcomputer 18.

Next, the operation of the elevator position detection device configured as described above will be explained.

A pulse signal is outputted from the pulse generator 4 in synchronization with the raising and lowering operation of the car 1, noise is removed and waveform shaped through the pulse input circuit 6, and pulse input signals 7a and 7b are inputted to the pulse counting microcomputer 18. .

The pulse counting microcomputer 18 operates according to the frequency of the oscillating machine 19, and counts positions using a counter provided inside.

In addition, after performing various arithmetic processing and performing hexadecimal conversion to display elevator floors, stoppable floors, etc., and displaying position data, data is sent via the data input/output bus line 2o. The data of the operation i processing result is loaded into the bidirectional input/output memory 21.

A higher-level operation control microcomputer (not shown) accesses this bidirectional input/output memory 21 at any time to retrieve necessary data and write data.

The operation of the power supply circuit of the pulse counting microcomputer 18 will be described next. In order to prevent deviations in position data when the power supply 9 is out of power or cut off, the power supply is switched using the following control method.

That is, when the voltage of the normal power supply 9 decreases and becomes below a predetermined voltage, the time-limited battery backup circuit 22 operates and supplies power from the second battery 25, supplying almost the same voltage as the normal power supply 9 to the micro battery. It is applied to the pulse counting microcomputer 18 via the computer source switching circuit 24.

Then, after the elevator stops at a predetermined floor, the time-limited battery backup circuit 22 cuts off the power supply from the second battery 25 after a certain margin, and the voltage of the time-limited battery power source 23 drops.

When the voltage of this limited time battery backup power supply 23 decreases, the microcomputer power supply switching circuit 2
4 is switched to the battery/power supply switching circuit 11 side, and this battery/power supply switching circuit 11 normally switches from 1flli9 to the memory backup battery 10, and pulses the backup power FAI2 from the memory backup battery 10 as the microcomputer power supply 26. The pulse counting microcomputer 18 is provided with the pulse counting microcomputer 18, and the memory of the pulse counting microcomputer 18 is backed up.

To explain in more detail the backup operation of the power supply circuit for the pulse counting microcomputer 18, as shown in the time chart of FIG. Then, the waveform of the battery backup power supply 12 is the same voltage while the normal power supply 9 is being supplied, but after the power outage occurrence timing to, the voltage decreases and the voltage of the memory backup battery 10 is
Switches to 1.

Next, the voltage waveform C of the time-limited battery backup circuit 22
The normal voltage V2 is maintained for a certain period T even after the voltage drop timing to of the normal power supply 9, and the timing after the elevator has completely stopped and the daily counter data of the pulse counting microcomputer has been determined. 1. Stop the backup at .

Therefore, the microcomputer power switching circuit 24
The voltage waveform d of the microcomputer power supply 26 is held at the normal power supply voltage V2 until timing t1, and then is switched to the power supply voltage V+ of the memory backup battery 10, and a transition is made to the memory backup operation.

In this way, the pulse counting microcomputer is used to perform data processing that was conventionally performed by the higher-level elevator operation υ control microcomputer, such as detecting the elevator position, determining floors that can be stopped, and creating signals for displaying the elevator position. In order to perform advanced data processing on the pulse counting microcomputer 18 side, the pulse generator 4 is
While the pulse signal is being input from the second battery 25, the time-limited battery backup circuit 22 supplies power at the same voltage as the normal power supply in order to maintain the arithmetic processing operation of the pulse counting microcomputer 18. After this is determined, the power is switched to the memory backup battery 10 to back up the memory of the determined data, and when the elevator is restarted, the pulse counting microcomputer 18 immediately stores the data in the memory 21. Based on the data, the arithmetic processing can be restarted according to the input pulse signal from the pulse generator 4, making it possible to eliminate the need for complicated procedures for restarting.

〔Effect of the invention〕

As described above, according to the present invention, in the conventional circuit, the pulse count circuit performs pulse counting on the pulse input signal from the pulse generator, and the pulse count data is transmitted to the host microcomputer. The calculation process used to be performed on the computer side to determine the elevator position, floors at which it can be stopped, floors that can be stopped, etc., can now be done on the pulse counting microcomputer side by using a pulse counting microcomputer.
The burden on the host microcomputer can be reduced by Pl.

In addition, since most of the calculation processing for pulse signals from the pulse generator is performed on the pulse counting microcomputer side, there is no need for a path buffer for data set input or count data input from the host microcomputer side. The circuit configuration can be simplified.

Furthermore, as a power supply circuit for the pulse counting microcomputer, a battery/power supply switching circuit between a normal power supply and a memory backup battery is provided, as well as a limited-time battery circuit that provides the same voltage as the normal power supply. Until the elevator car moves to a predetermined stop floor and stops, as long as there is an input signal from the pulse generator, arithmetic processing is performed on the pulse input signal, and when the data is determined, it is recorded in memory. Since the power source is switched to memory backup battery power to maintain data, the pulse counting microcomputer immediately switches to the pulse generator based on the data stored in memory without having to perform many procedures when restarting. It is possible to restart the arithmetic processing for the pulse input signal from the controller, and it is also possible to prevent inconveniences caused by a power outage or interruption of the normal power supply.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of an embodiment of the present invention, FIG. 2 is a time chart explaining the operation of the above embodiment, and FIG. 3 is a circuit diagram of a conventional example. 1... Car 2... Hoisting machine 3... Drive motor 4... Pulse generator 6... Pulse input circuit 9... Normal power supply 10...
・Memory backup battery 11...Battery・
Power supply switching circuit 12...Battery backup power supply 15...Microcomputer pass line 18...
Pulse counting microcomputer 21... Bidirectional input/output memory 22... Limited time battery backup circuit 23... Limited time battery power supply 24... Microcomputer power supply switching circuit 25.
・Second battery

Claims (1)

[Claims] A pulse generator that generates pulses synchronized with the movement of the elevator, an input circuit for the pulse signals generated by this pulse generator, and a pulse count that detects the elevator position using the pulse input signal from this input circuit and stores the data. The microcomputer transmits the processing data of this pulse counting microcomputer to the operation control microcomputer that performs other operation control processing of the elevator, and also transmits the data from this operation control microcomputer to the pulse counting microcomputer. an interface circuit for data transmission, a normal power supply and memory backup battery as a power supply circuit for the pulse counting microcomputer, and a battery/power supply switching circuit for these;
A time limit battery circuit that provides a power supply voltage to maintain the normal power supply voltage for a certain period of time when the power supply voltage applied to the pulse counting microcomputer from the battery/power supply switching circuit drops; An elevator position detection device comprising: a microcomputer power supply switching circuit that switches an output from a battery circuit and supplies the output to the pulse counting microcomputer.