JPH0952669A - Elevator position detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically correct an error of the elevator car position pulse data due to a rope creep, and to maintain the accurate elevator car position detecting function for a long time. SOLUTION: A pulse generating unit 6 generates the pulse signal of the number proportional to the running distance of an elevator 1, and an elevator car position control unit 7 counts the pulse signal for estimation so as to compute the elevator position, and on the other hand, a floor detecting switch 9 generates the specified position passing detecting signal when an elevator passes through the preset position inside of a hoistway. The real pulse data C, which is computed by the car position control unit when the floor detecting switch generates the elevator passing detecting signal, and the reference pulse data D, which is stored in the car position data memory 12, are compared with each other, and in the case where an error exceeding the allowable range is generated, the real pulse data C of the car position control unit is automatically corrected on the basis of the reference pulse data D, and this corrected data is used for the position control thereafter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator position detecting device having an automatic position correcting function for accurately detecting a car position of an elevator.

[0002]

2. Description of the Related Art Generally, an elevator system has a mechanical structure as shown in FIG. The elevator car 1 is connected to the counterweight 3 by the wire rope 2,
The motor 4 transmits the rotational force to the main sheave 5, and the main sheave 5 uses the frictional force between the main sheave 5 and the wire rope 2 wound around the main sheave 5 to move the car 1 up and down. A pulse generator (PG) 6 that detects the shaft rotation of the motor 4 and that generates a number of pulse signals proportional to the rotation angle is installed, and the car position control unit 7 includes a pulse generator 6
The pulse position of the car is controlled by performing the pulse count of the pulse signal generated by, detecting the elevator position by the integrated pulse number. The speed control unit 8 performs speed control calculation from the motor position data processed by the car position control unit 7 and the motor rotation speed data obtained from the pulse frequency of the pulse generator 6, that is, the speed feedback data of the car 1, The rotation torque command is output to 4 to control the speed.

Generally, in the elevator, the wire rope 2
A slip occurs between the main sheave 5 and the main sheave 5, and the slip becomes larger as the traveling distance of the elevator becomes longer and the wire rope becomes longer, that is, as the elevator installation building has a higher floor.

Therefore, when the car position is controlled by calculating the car position from the pulse generated by the pulse generator 6 attached to the rotating shaft of the motor 4 as described above, if a slip occurs between the wire rope and the main sheave. There arises a problem that the actual car position deviates from the car position on the instrument, which is determined based on the pulse signal, that is, the problem of rope creep. If this rope creep occurs and its deviation becomes large, elevator position control cannot be performed accurately, and a landing error will occur.

Therefore, as a conventional method for correcting the deviation caused by rope creep, when the elevator stops at a certain floor, the pulse count data is corrected to a preset reference pulse count number corresponding to the floor position. The method is adopted.

[0006]

However, such a conventional elevator position detecting device has the following problems. Especially in the case of an elevator installed in a building with a high floor, the transit floor is set in advance like zone control and bank control, and the passengers are designed to be transported quickly from the entrance hall to the floor of a certain zone. However, if rope creep occurs on the passing floor, the display on the position display plate installed in the elevator car or the position display plate installed in the elevator hall will be significantly different from the actual elevator position. However, there is a problem in that the elevator arrives at the destination floor of the user or the waiting floor of the hall, although the vehicle should still be traveling in the passage zone on the display board, giving a feeling of distrust.

This rope creep is simply caused by the deviation between the main sheave and the wire rope,
Since there is no mechanical or electrical failure in other parts, if rope creep occurs, it is possible to ensure safe operation of the elevator simply by correcting the elevator position. it can.

However, conventionally, the position deviation caused by the rope creep and the position deviation caused by the abnormality of the pulse generator are not distinguished, and if the position detection operation becomes abnormal, the elevator is always stopped and a technician is called for inspection. Since the repair is performed, the elevator has to be stopped for a long period of time, which causes a great inconvenience for the user.

The present invention has been made in view of the above conventional problems, and the position deviation of the elevator car caused by the rope creep is distinguished from the position deviation of the elevator car caused by the abnormality on the side of the pulse generating means. If there is an error exceeding the allowable range between the reference pulse count number corresponding to the reference floor and the pulse count number by the pulse generation means when passing through a certain reference floor even though it is normal Another object of the present invention is to provide an elevator position detecting device capable of automatically performing elevator position detection correction based on the pulse signal of the pulse generating means and continuously operating the elevator.

[0010]

According to a first aspect of the present invention, there is provided an elevator position detecting device for determining a pulse generating means for generating a pulse signal of a number proportional to a traveling distance of an elevator and the presence / absence of abnormality of the pulse generating means. Pulse generation means abnormality determination means, elevator position calculation means for integrating and counting the pulse signals generated by the pulse generation means, and a signal for detecting the passage when the elevator passes through a preset position in the hoistway. Elevator passage detection signal generation means, reference pulse data storage means for storing a reference pulse count number corresponding to a position where the elevator passage detection signal generation means generates an elevator passage detection signal, and pulse generation means abnormality determination means is pulse generation means. Is determined to be normal, and the elevator passage detection signal generation means is When comparing the pulse count number calculated by the elevator position calculation means with the reference pulse count number stored by the reference pulse data storage means, when the error exceeding the allowable range occurs, that of the elevator position calculation means Pulse count number correcting means for replacing the pulse count numbers up to the above with the reference pulse count numbers.

In the elevator position detecting device according to the present invention, the pulse generating means generates the number of pulse signals proportional to the traveling distance of the elevator, and the elevator position calculating means integrates and counts the pulse signals to determine the elevator position. calculate. Further, when the elevator passes a preset position in the hoistway, the elevator passage detection signal generating means generates a detection signal of passage of the elevator at a specific position.

Therefore, on the condition that the pulse generation means abnormality determination means determines that the pulse generation means is normal, the pulse count number correction means causes the elevator passage detection signal generation means to make the elevator passage detection signal. When comparing the pulse count number calculated by the elevator position calculation means with the reference pulse count number stored in the reference pulse data storage means, when an error exceeding the allowable range occurs, the elevator position calculation means The pulse count number is replaced with the reference pulse count number. Then, thereafter, the elevator position calculating means continues counting the pulse signals from the pulse generating means with respect to the replaced reference pulse count number to continue the elevator position calculating operation.

Thus, there is no abnormality in the pulse generating means,
When the elevator position calculated by the elevator position calculation means based on the pulse count is distorted due to rope creep, it is possible to automatically correct when the elevator passes a specific position and always maintain an accurate position detection function. it can.

According to a second aspect of the present invention, in the elevator position detecting apparatus according to the first aspect, the pulse generation means abnormality determination means monitors the pulse cycle of the pulse signal generated by the pulse generation means, and the pulse cycle is set in advance. The normality / abnormality of the pulse generating means is judged by whether or not there is a deviation exceeding the allowable range from the reference pulse cycle.
When the pulse generating means is judged to be normal, the pulse count number correcting means is allowed to perform the pulse count number correcting operation.

With this, it is possible to accurately determine whether or not there is an abnormality in the pulse generating means, and only when there is no abnormality, the function of automatically correcting the position detection error of the elevator based on the pulse count can be activated.

According to a third aspect of the present invention, in the elevator position detecting apparatus according to the first or second aspect, the pulse count number correcting means performs the time required for the position correction calculation process of the elevator position detecting apparatus with respect to the reference pulse count number. The pulse count number corresponding to the distance traveled by the elevator is added as the correction pulse number, and is replaced with the pulse count number of the elevator position calculating means as the regular pulse count number.

Accordingly, by changing the setting of the correction pulse number according to the height of the elevator speed specification, it is possible to flexibly cope with the height and the elevator performance of the elevator installation building.

According to a fourth aspect of the present invention, in the elevator position detecting apparatus according to any of the first to third aspects, the elevator passage detection signal generating means is installed at a plurality of preset positions in the hoistway, and a reference pulse is provided. The data storage means stores a plurality of reference pulse count numbers corresponding to the elevator passage detection signal generating means at the plurality of positions.

As a result, especially when used for an elevator installed in a high-rise building, it becomes possible to automatically correct a position detection error caused by rope creep for each of a plurality of passing positions, and an accurate position detection function can be obtained. Can be maintained.

According to a fifth aspect of the invention, in the elevator position detecting apparatus according to any of the first to fourth aspects, the elevator passage detection signal generating means is installed at a position corresponding to a floor set as a passage floor of the elevator. It is a thing.

Accordingly, particularly when applied to an elevator installed in a high-rise building, the elevator position can be automatically corrected while traveling in a long express zone, and an accurate position detection function can be maintained at all times.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the embodiment shown in FIG. 1, the elevator car 1 has the same elevator speed / position control system as in the conventional example, and the elevator car 1 is connected to the counterweight 3 by the wire rope 2.
The motor 4 transmits the rotational force to the main sheave 5, and the main sheave 5 uses the frictional force between the main sheave 5 and the wire rope 2 wound around the main sheave 5 to move the car 1 up and down. A pulse generator (PG) 6 that detects the shaft rotation of the motor 4 and generates a number of pulse signals proportional to the rotation angle is installed, and the car position control unit 7 generates pulses generated by the pulse generator 6. The up / down count of the signal is performed, the elevator position is detected by the integrated pulse number, and the car position is controlled. The speed control unit 8 performs speed control calculation from the motor position data processed by the car position control unit 7 and the motor rotation speed data obtained from the pulse frequency of the pulse generator 6, that is, the speed feedback data of the car 1, The rotation torque command is output to 4 to control the speed.

The automatic correction system of the pulse count number used by the car position control unit 7 is constructed as follows. A floor position detection plate 9a is installed at a predetermined position in the hoistway of the building where the elevator is installed (especially each floor corresponding to the passage zone in the case of a high-rise elevator), and these are installed on the elevator car 1 side. A floor detection switch 9b for detecting the presence of the floor position detection plate 9a is installed. The floor detection unit 10 which receives the detection signal of the floor detection switch 9b has a pulse period measuring function for measuring the period of the pulse signal input from the pulse generator 6 and a pulse measured by this pulse period measuring function. The floor switch 9 has a pulse generator operating state determination function for determining normality / abnormality of the pulse generator 6 depending on whether the cycle is normal or not, and conditions under which the pulse generator 6 determines normality.
It has a correction system start command output function that outputs a correction system start command A at the timing when the floor detection signal of b is input.

The correction value storage unit 11 is a floor detection switch 9b.
The number of pulses that the pulse generator 6 will generate corresponding to the distance traveled by the elevator car 1 from the operation timing of 1 to the completion of the automatic correction of the pulse count number by the present elevator position detection device is stored as the correction value B. are doing. In the car position data storage unit 12, the count number of the pulse signal output by the pulse generator 6 in a normal state is registered in advance as reference data corresponding to the installation position of the floor detection plate 9a of each floor.

The pulse data comparison unit 13 is the floor detection unit 10.
When receiving the correction system start command A from the car position control unit 7
Compares the actual pulse data C obtained by the integrated counting with the reference pulse data D registered in the car position data storage unit 12, and outputs the pulse data correction command E depending on whether the difference exceeds the allowable range. To do.
When the pulse data correction unit 14 receives the correction system activation command A from the floor detection unit 10, the pulse data correction unit 14 gives the reference pulse data D given from the car position data storage unit 12 via the pulse data comparison unit 13 and the correction value storage unit 11. Correction data B
And are added and given to the car position control unit 7 as corrected pulse data F.

Next, the operation of the elevator position detecting device of this embodiment will be described. The operation of this elevator position detection device, together with other elevator control programs as a control program registered in the microcomputer,
It is repeatedly executed at a certain cycle from the start of the elevator, and operates according to the flowchart of FIG.

The main sheave 5 rotates in the forward and reverse directions by the rotational driving of the motor 4, and the car 1 and the counterweight 3 connected by the wire rope 2 move up and down like a fishing bottle. Pulse generator 6 attached to the rotation shaft of the motor 4
Outputs a pulse signal in proportion to the rotation angle of the motor 4,
This is output to the car position control unit 7 and the speed control unit 8, and the car position control unit 7 obtains pulse data by performing integrated counting of pulse signals (addition in case of rising, subtraction in case of machining). Then, this is converted into position data to determine the car position, and a speed command according to a speed pattern registered in advance according to the car position is given to the speed control unit 8. The motor speed is calculated from the cycle of the pulse signal input from the pulse generator 6, and the speed control unit 8 controls the speed of the motor 4 so as to match the given speed command.

When the car 1 passes through the floor on which the floor detection plate 9a is installed, for example, the fourth floor in the ascending direction while the elevator is operating, and the floor detection switch 9b is operated, the floor is detected. The signal is input to the detection unit 10, and the pulse data correction processing routine shown in FIG. 2 is started (step S1).

The floor detection unit 10 always takes in the pulse signal from the pulse generator 6, measures the pulse period thereof, and compares it with the reference pulse period in the normal state which is registered in advance within the allowable range. If they match, the pulse generator 6 is judged to be normal, and a normal / abnormal judgment result is output when the pulse data correction processing routine is started (steps S2 to S5). If it is determined to be abnormal here,
Since it is an abnormality on the side of the pulse generator 6, the abnormality determination result is output to the elevator control device (not shown) without performing the processing of step S6 and thereafter, and the instructions for elevator stop, inspection, and repair are output.

On the other hand, when it is determined that the pulse generator 6 is normal, the correction system start command A is simultaneously output to the correction value storage unit 11, the pulse data comparison unit 13 and the pulse data correction unit 14 (step S5). In response to this, the pulse data comparison unit 13 reads the actual pulse data C from the car position control unit 7, reads the reference pulse data D from the car position data storage unit 12 and compares them, and an error exceeding the allowable range occurs. If so, the correction command E is output, and if no error exceeding the allowable range has occurred, this correction processing routine ends (steps S6 to S8).

When an error exceeding the permissible range has occurred in the determination in step S8 and the pulse data comparison unit 13 gives the correction instruction E to the pulse data correction unit 14, the pulse data correction unit 14 outputs the correction value storage unit 11 from the correction value storage unit 11. The correction value B is read and added to the reference pulse data D when the car 1 rises, and on the contrary, subtracted when the car 1 descends to calculate the corrected pulse data F (step S9), and the car position control unit 7
The corrected pulse data F is used as a reference to restart the cumulative counting of pulse signals thereafter (step S10).

Similarly, the elevator car 1 passes through the position of the floor detection plate 9a on the 5th floor, and the floor detection switch 9b turns to 1.
When the passage of the 0th floor is detected, the correction process of the car position corresponding pulse data is executed based on the flowchart of FIG.

An example of this pulse data correction process is as follows. The floor detection plate 9a is installed corresponding to each floor in the elevator hoistway, and the 1st floor ... 1111 2nd floor ... 2222 3rd floor ... 3333 4th floor ... 4444 5th floor ... 5555 6th floor ... 6666 7th floor ... 7777 It is assumed that the reference pulse data of 8th floor ... 8888 is registered in the car position data storage unit 12, and that 11 is registered as the pulse data correction value in the correction value storage unit 11.

When the car 1 passes through the fourth floor and the floor detection switch 9b inputs a detection signal to the floor detection unit 10,
The pulse generator 6 is normal, and the actual pulse data and this 4
When the error from the reference pulse data 4444 on the floor is large, and the car 1 is rising, the car position control unit 7 (4
The pulse data of 444 + 11) = 4455 is replaced with the actual pulse data up to that point, and thereafter, the cumulative counting of pulse signals is restarted from this pulse data. If the actual pulse data calculated by the car position control unit 7 is within the range of 4433 to 4455, the maximum difference between the actual pulse data and the reference pulse data 4444 is 11
Since it is only a degree, the correction process is not executed, and the subsequent position control is continued based on the original actual pulse data. Note that these pulse data are just examples,
It is not limited to this.

As described above, according to the elevator position detecting apparatus of this embodiment, the floor detecting section 10 measures the period of the pulse signal supplied from the pulse generator 6 to determine whether or not there is an abnormality, and If there is no abnormality on the generator 6 side and there is an error between the actual pulse data and the reference pulse data that exceeds the allowable range, it is determined that rope creep has occurred and the actual pulse data is determined. By automatically correcting based on the reference pulse data, the elevator position control and speed control based on the pulse signal generated by the pulse generator in proportion to the movement of the elevator car can always be performed accurately.

[0036]

As described above, according to the first aspect of the present invention, the pulse generating means generates the pulse signals of the number proportional to the traveling distance of the elevator, and the elevator position calculating means cumulatively counts the pulse signals. Then, the elevator position is calculated, and when the elevator passes a preset position in the hoistway, the elevator passage detection signal generating means generates a detection signal of passage of a specific position of the elevator, and the pulse generating means is abnormal. The pulse count number and the reference calculated by the elevator position calculation means when the elevator passage detection signal generation means generates the elevator passage detection signal, with one condition that the determination means determines that the pulse generation means is normal. The reference pulse count number stored in the pulse data storage means is compared in the pulse count number correction means. When an error exceeding the allowable range occurs, the pulse count number of the elevator position calculation means is replaced with the reference pulse count number, and thereafter, the elevator position calculation means outputs the replaced reference pulse count number from the pulse generation means. Since the elevator position calculation operation is continued by counting the pulse signals of the above, there is no abnormality in the pulse generating means, and the rope creep causes a deviation in the elevator position calculated by the elevator position calculating means based on the pulse count. In this case, when the elevator passes a specific position, it can be automatically corrected and an accurate elevator position detection function can be maintained at all times, and the elevator position control and speed control can be performed accurately.

According to the second aspect of the invention, the pulse generation means abnormality determination means monitors the pulse cycle of the pulse signal generated by the pulse generation means, and the pulse cycle is allowed between the pulse cycle and a preset reference pulse cycle. The normality / abnormality of the pulse generating means is judged depending on whether a deviation exceeding the range has occurred, and when the pulse generating means is judged to be normal, the pulse count number correcting means is allowed to perform the pulse count number correcting operation. Therefore, it is possible to accurately determine whether or not there is an abnormality in the pulse generating means, and only when there is no abnormality, the function of automatically correcting an elevator position detection error based on the pulse count can be activated.

According to the third aspect of the invention, the pulse count number correcting means determines the pulse count number corresponding to the distance traveled by the elevator during the time required for the position correction calculation processing of the detection device with respect to the reference pulse count number. Since it is added as the correction pulse number and is replaced with the pulse count number of the elevator position calculating means as the regular pulse count number, the height of the elevator installation building is changed by changing the setting of the correction pulse number corresponding to the high speed and low speed of the elevator speed specification,
It can flexibly respond to elevator performance.

According to the invention of claim 4, the elevator passage detection signal generating means is installed at a plurality of preset positions in the hoistway, and the elevator passage detection signals at the plurality of positions are stored in the reference pulse data storage means. Since a plurality of reference pulse count numbers corresponding to each generating means are stored, the position detection error caused by rope creep is automatically corrected for each of a plurality of passing positions, especially when it is used for an elevator installed in a high-rise building. Therefore, the accurate position detection function can be maintained.

According to the fifth aspect of the present invention, the elevator passage detection signal generating means is installed at a position corresponding to the floor set as the passage floor of the elevator. Therefore, particularly in an elevator installed in a high-rise building. When used, the elevator position can be automatically corrected while traveling in a long express zone, and an accurate position detection function can be maintained at all times.

[Brief description of drawings]

FIG. 1 is a functional block diagram of one embodiment of the present invention.

FIG. 2 is a flowchart showing automatic correction processing of car position pulse data according to the above embodiment.

FIG. 3 is a functional block diagram of a conventional example.

[Explanation of symbols]

 1 car 2 wire rope 4 motor 5 main sheave 6 pulse generator 7 car position control unit 8 speed control unit 9a floor detection plate 9b floor detection switch 10 floor detection unit 11 correction value storage unit 12 car position data storage unit 13 Pulse data comparison unit 14 Pulse data correction unit

Claims (5)

[Claims] 1. A pulse generating means for generating a number of pulse signals proportional to the traveling distance of an elevator, a pulse generating means abnormality determining means for determining whether or not there is an abnormality in the pulse generating means, and a pulse generated by the pulse generating means. Elevator position calculation means for integrating and counting signals, elevator passage detection signal generation means for generating a signal for detecting the passage when the elevator passes a preset position in the hoistway, and the elevator passage detection signal The reference pulse data storage means for storing the reference pulse count number corresponding to the position where the generation means generates the elevator passage detection signal, and the pulse generation means abnormality determination means determines that the pulse generation means is normal, and When the elevator passage detection signal generating means generates the elevator passage detection signal, the elevator passage detection signal is generated. The pulse count number calculated by the position calculation means and the reference pulse count number stored by the reference pulse data storage means are compared, and when an error exceeding the allowable range is generated, the pulses up to that point of the elevator position calculation means are compared. An elevator position detecting device comprising pulse count number correcting means for replacing the count number with the reference pulse count number. 2. The pulse generation means abnormality determination means monitors a pulse cycle of a pulse signal emitted by the pulse generation means, and a deviation exceeding an allowable range is generated between the pulse cycle and a preset reference pulse cycle. The normality / abnormality of the pulse generating means is judged depending on whether or not it is generated,
2. The elevator position detecting device according to claim 1, wherein the pulse count number correcting unit permits the pulse count number correcting operation when the pulse generating unit is judged to be normal. 3. The pulse count number correction means corrects the pulse count number corresponding to the distance traveled by the elevator during the time required for the position correction calculation processing of the elevator position detection device with respect to the reference pulse count number. 3. The elevator position detecting device according to claim 1, wherein the elevator position detecting device is added as a number, and is replaced with a pulse count number of the elevator position calculating means as a regular pulse count number. 4. The elevator passage detection signal generation means is installed at a plurality of preset positions in the hoistway, and the elevator pulse detection signal generation means at each of the plurality of positions is stored in the reference pulse data storage means. A plurality of corresponding reference pulse count numbers are stored and stored.
3. The elevator position detection device according to any one of 3. 5. The elevator position detecting device according to claim 1, wherein the elevator passage detection signal generating means is installed at a position corresponding to a floor set as a passage floor of the elevator. .