KR900002785B1 - Control devices of elevator - Google Patents

Abstract

The controller is for consuming the regenerative power in a motor. A compensator (16) generates a power drive torque command when an elevator starts. When the elevator enters a deceleration step, the compensator generates a brake torque command, a current value instruction circuit (32) outputs an absolute value of a current in response to the torque command, and a frequency instructing circuit (31) outputs a frequency command necessary for a motor speed. A current command composite circuit (38) combines them, outputs a command value of the output current of an inverter (7), and a PWM unit (36) controls the transistor of the inverter.

Description

Elevator control

1 is an overall configuration diagram of an elevator control device.

2 is a configuration diagram showing details of a control circuit of an elevator control apparatus in the related art.

3 is a schematic configuration diagram of the microcomputer in FIG.

4 is an explanatory diagram of a RAM storing conventional level position data.

Fig. 5 shows a flowchart for recording level position data in a conventional RAM.

6 is a configuration diagram showing an example of a counting circuit in the elevator control apparatus of the present invention.

7A to 7C are explanatory diagrams of a RAM in the present invention.

8 shows a flowchart for recording the level position data into the RAM according to the present invention.

9 is a flowchart showing a program used in the elevator control apparatus according to the second embodiment of the present invention.

10 is a flowchart showing details of a correction amount calculation subroutine in FIG.

11 is a flowchart showing a program used for the elevator control apparatus according to the third embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control apparatus, and more particularly, to an elevator control apparatus suitable for controlling an elevator using a microcomputer.

1 shows a schematic configuration of an elevator control apparatus for controlling elevators traveling on a plurality of floors by a microcomputer. In FIG. 1, 1 is an elevator car (hereinafter abbreviated as car), 2 is a counterweight, and 3 is a rope wound around a pulley 4, and both ends of the rope 3 are respectively a car 1 and a counterweight. (2) is combined.

5 is a motor for driving the pulley 4, 6 is a pulse generator for generating a pulse proportional to the moving distance of the car 1 by the rotation of the motor (5), 7 is a pulse generator in the pulse generator (6) The counting circuit 8, which counts, is a microcomputer that receives a signal from the counting circuit 7 and performs a predetermined arithmetic processing. The CPU 8a, ROM 8b, RAM 8c, and input port as shown in FIG. 8d and output port 8e.

9 is a floor, 10 is a plate mounted on the hoistway corresponding to each floor, and 11 and 12 are position detectors installed on the car 1, and when the car 1 reaches the level and position of each symptom, the output signal 11a is respectively. (12a) to the counting circuit (7) and the microcomputer (8), the position detector (11) is 10 mm below the level, the position detector (12) is to send a signal at 10 mm above the level, respectively. .

FIG. 2 shows a specific configuration diagram of the counting circuit 7 in FIG. ₁ , and includes counters CT ₁ and CT ₂ composed of 4-bit binary circuits, and T of this counter CT ₁ . terminal has been so applied via the output pulses (6a) are NAND circuits (NAND ₁₎ T terminal of that at the same time counter (CT ₂₎ is so applied directly sickle circuit (NOT ₁₎ of the pulse generator (6), For this reason, the driving pulses of the car 1 between each operation cycle of the microcomputer 8 are counted and stored in each counter CT ₁ , CT ₂ , and the count value is stored in the input port 8d in the following input processing. Is sent to the CPU 8a via the " The counting circuit 7 has an RS flip-flop (hereinafter simply referred to as flip-flop) FF ₁ and FF ₂ , and each set terminal S of each flip-flop FF ₁ and FF ₂ is a NAND circuit (NAND ₂ ), ( The outputs of NAND ₃ are respectively connected, and the rising signal UP emitted from the microcomputer 8, the output signal 11a from the position detector 11, and its output are connected to the input of the NAND circuit NAND ₂ . The signal 11a is applied to the sickle circuit NOT ₂ and a signal obtained through the time constant circuit of the resistor R ₁ and the capacitor C ₁ , and a microcomputer (NAND ₃ ) is input to the input of the NAND circuit (NAND ₃ ). 8, the falling signal DN generated from the position detector 12, the output signal 12a from the position detector 12, and the output signal 12a thereof, the sickle circuit NOT ₃ , the resistor R ₂ , and the capacitor C ₂ . The signal obtained through the correcting circuit is applied.

In the flip-flop (FF _1), each ★ scan, the output of (FF ₂₎ is a logical sum circuit (OR ₁₎ being connected to an input of the OR circuit (OR ₁₎ the output signal is different from the NAND circuit (NAND ₁₎ of It is supposed to be applied as the input to the page.

This causes the counter CT ₂ to stop the counting operation whenever the output signal of the position detector 11 or 12 rises.

The reset signals RESET transmitted from the microcomputer 8 are applied to the reset terminals R of the counters CT ₁ , CT ₂ , and flip-flops FF ₁ , FF ₂ . have.

4 shows the inside of the RAM 8c of the microcomputer 8 storing the level position data on each floor, where each floor location of the N-stop building is located from the lowest floor to the highest floor, and the FLH (0) is the lowest floor. Level position and FLH (N-1) indicates the level position of the uppermost layer.

Next, the operation of the elevator control device configured as described above will be described. The case of writing the layer heights of each layer into the RAM 8c will be described based on the flowchart of FIG.

(a) First, in the state where the microcomputer 8 is initially set, the car 1 is stopped at the lowest floor, and the level position corresponding to the lowest floor is, for example, the reference value L, and this is FLH (0). Record at address 0 of. At this time, the current position FSY of the car is set to LO.

(b) Next, driving the car _{1 up} and counting the pulses generated by the pulse generator 6 with the counters CT ₁ and CT ₂ as the car travels measures the distance traveled by the car and the microcomputer The count value DP ₁ of the counter CT ₁ and the count value DP ₂ of the counter CT ₂ are determined by the input processing indicated in step 100 of FIG. 5 according to the start of the recording operation processing program of (8). (8), the reset signal RESET is sent by the microcomputer 8 in the next step 101, and the respective counters CT ₁ and CT ₂ are reset, and the flip-flop FF ₁ , Reset (FF ₂ ).

When the reset process is completed, the process proceeds to the next step 102, and it is determined whether the car 1 is in the ascending run, and when the recording process is "NO", the recording process is not performed. In the following procedure 103, it is determined whether the output signal 11a of the position detector 11 has risen when it is determined that the vehicle is traveling up, and when the determination is "NO", the procedure shifts to the procedure 106 and inputs the counter CT. the cumulative sum by a coefficient value (DP ₁₎ in ₁₎ in the microcomputer 8, and the processing of FSY FSY ← + DP1. If FSY is the current position of the car 1 and is running, the processes from steps 100 to 103 and 106 are performed for each calculation cycle of the microcomputer 8.

(c) Next, when the car 1 reaches the level position of the next floor and the microcomputer 8 detects the level signal generated by the position detector 11, the determination result in step 103 is "YES". Since the process proceeds to step 104, the process of I + 1 is performed so as to become the layered address of the RAM 8c to which the advice value should be recorded.

Then, the procedure proceeds to the next step 105, and the calculated value at the time when the level signal of the position detector 11 is issued is calculated by adding the count value DP ₂ of the counter CT ₂ to the current position FSY, and this calculated value FLH ( 1) is recorded in the address I of the RAM 8c corresponding to this.

In the same manner, the calculations from steps 100 to 106 are repeated to the uppermost floor, where the advice values FLH (0) -FLH (N-1) corresponding to the level positions on each floor are stored in the RAM 8c in the case of N-stop buildings. This is recorded as shown in FIG.

The advice thus obtained is used for normal operation of the elevator. In other words, the advice recorded in the RAM 8c is used to correct the current position of the car, the driving distance from the starting floor to the landing floor, the remaining distance from the landing floor, or the reference speed command. It can be used for generating control. However, the above conventional advice writing method has the following drawbacks.

(a) If the car is out of level position, the current position of the car cannot be modified.

(b) Even if the elevator attempts to correct it as an escape from the door zone (door opening / closing section) at start-up, when the number of years has elapsed, the level position on each floor cannot be corrected precisely due to the wear of the pulley.

In other words, if you try to modify the length of the door zone LDZ (previously stored as a fixed value in the ROM) in terms of extra traveling pulse, it becomes FSY ← FLH (1) + LDZ / 2 (stage I: stud layer). It is a fixed value stored in the ROM and the amount of pulley wear is not taken into account, so an accurate correction is not made.

(c) It does not remember exactly the level points on the floor of the building. That is, since the position detector does not detect the level point correctly, but checks the level point of 10 mm before and after the floor, the advice value FLH 1 has a difference of 10 mm.

Therefore, for example, in order to obtain the remaining distance in the ascending operation, an error of 10 mm occurs even when the FLH (1) -FSY (current position) is calculated, which causes deterioration of the landing accuracy of the elevator.

The present invention has been made to solve the above-mentioned shortcomings, and each floor position data for obtaining the present value of the elevator car, the remaining distance to conception, the reference speed command of the car, etc. is accurately stored in the RAM, and even if the car starts outside the level. It is to provide an elevator control device that can accurately correct the current position of the car.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

6 shows an example of a counting circuit in the elevator control apparatus of the present invention. The same reference numerals are given to the second and the same parts, and the description thereof is omitted, and the second diagram and the other parts are solved.

In other words, the difference between the second and the second point is that the logical sum of the output signals 11a and 12a of the position detectors 11 and 12 is obtained and the counter CT ₂ is counted when the logic sum signal rises and falls. .

For this reason, in this embodiment, a NOR circuit NOR ₁ for obtaining the logical sum of the output signals 11a of the position detectors 11 and 12 in FIG. ₁ is provided, and the output of this NOR circuit NOR _{1 is} provided. through the sickle circuit (NOT ₃₎ the signal make it a type of one of the NAND circuits (NAND _2), the NAND circuit (NAND ₂₎ the other input, the better the signal obtained in better circuit (NOT ₃₎ circuits (NOT ₂ ) And through the time constant circuit consisting of a resistor (R ₁ ) and a capacitor (C ₁ ) and the sickle circuit (NOT ₃ ) or through the sickle circuit (NOT ₂ ) and the time constant circuit The obtained signals are respectively applied to the two inputs of the NAND circuit NAND ₃ through the sickle circuit NOT ₄ and NOT ₅ .

As a result, the counter CT ₂ stops counting when the flip-flops FF ₁ and FF ₂ are set to the outputs of the NAND circuits NAND ₂ and NAND ₃ .

When the count value obtained by the counting circuit 7 having such a configuration is input to the microcomputer 8 and subjected to the arithmetic processing shown in FIG. 8, the level position on each floor can be accurately obtained.

That is, the position detectors 11 and 12 are for detecting the level position of the floor (eg, 10 mm after bottom), but the actual operating point is to continue the operation from 10 mm after floor to 300 mm after the floor.

Therefore, the present invention is applied to the RAM 8c of the microcomputer 8 with the level value FLHD (I) of 300 mm after the passage on each layer, that is, the level value of 300 mm of the bottom, and FLHU (I) of 300 mm above the floor. Basically, these values are used to calculate [FLHD (I) + FLHU (I)] ÷ 2 to obtain level positions on each floor, and store them in the RAM 8c to provide selector correction, remaining distance calculation, etc. I did it.

Next, in the embodiment of the present invention, the recording operation of the level position data on each floor will be described with the flowchart of FIG.

7 will be described before the operation.

Fig. 7 (a) shows FLDH (0) -FLDH at N-1 to N-1 at RAM 8c, corresponding to the lowermost layer at the lowermost level, for example, at a level position of 300 mm below the floor on each floor of N stops. 7 (b), FLHU (0) -FLHU (is shown in Fig. 7 (b) at the 0-1 level of RAM 8c at N-1, corresponding to the level value of 300mm above the floor. N-1), and Fig. 7 (c) takes the average value of the values of Fig. 7 (a) and (b) and changes the actual level position from address 0 to address N-1 of the RAM 8c. It is stored as FLHL (0) + FLHL (N-1).

First, the car 1 is stopped at the lowest floor.

At this time, the level position corresponding to the lowest layer is obtained by [FLHD (0) + FLHU (0)] ÷ 2, and the resulting level position is FLH | (0), as shown in FIG. Memorize at 0).

Next, the car 1 is driven up and the pulses generated by the pulse generator 6 according to the running of the car are counted by the counters CT ₁ and CT ₂ . The count value DP ₁ of the counter CT ₁ and the count value DP ₂ of the counter CT ₂ are determined by the input processing indicated at the level 200 of FIG. 8 according to the start of the recording operation processing program of (8). (8), the reset signal (RESET) is sent from the microcomputer (8) in the next procedure 201, and the respective counters (CT ₁ ) and (CT ₂ ) are reset, and the flip-flop (FF ₁ ) Reset (FF ₂ ).

When the reset processing is completed, the process proceeds to the next step 202 to determine whether or not the car 1 is in the ascending run, and when " NO ", no recording process is performed.

When it is determined that the vehicle is being driven up, the next step 203 determines whether the signal 12a of the position detector 12 has risen, and if the result is "YES", the microcomputer 8 proceeds to step 204. The process of I + 1 is carried out so as to become the layered address of the RAM 8c which records a significant value at 300 mm below the bottom of the layered floor, and the processing of FLDH (I)? FSY + DP ₂ is performed in the next procedure 205.

That is, the counted value of the counter CT ₂ input to the calculated value DPZ of the counter CT ₁ input for each calculation cycle of the microcomputer 8 and the current position FSY of the car which accumulated and added the traveling distance of the car before this. (DP ₂ ) is added, and this is recorded as FLDH (I) at the address of the RAM 8c corresponding to the I layer.

Again according to the procedure 206 along with the rising operation of the car (1) FSY ← FSY + by the process of the DP ₁ and enter the counter value (DP ₁₎ of the counter (CT ₁₎ for each CS cycle of the microcomputer 8 of the car Cumulatively add the present value.

On the other hand, if the determination in step 203 is "NO", the procedure goes to step 207 to determine whether the signal 11a of the position detector 11 falls.

At this time, if "NO", the flow advances to step 206 to perform the cumulative addition process of the present value of the car. When " YES " is determined, the procedure goes to step 208 to execute FLHU (I)? FSY + DP ₂ processing.

That is, the count value DP ₂ of the input counter CT ₂ is added to the current position value FSY of the car accumulated and added to the microcomputer 8, and this is FLHU (I), and the RAM 8c corresponding to the I layer is provided. Record at the street address.

When the recording of the data equivalent to 300 mm of the bottom is completed, the process proceeds to step 209 where the processing of FLHL (I)? [FLHD (I) + FLHU (I)] 2 is executed.

In other words, the average value of the level values including the upper and lower 300 mm of the floor in the I layer is obtained and stored in the I address of the RAM 8c as the correct level position value.

In the same manner, the procedure from steps 200 to 209 is repeated to the uppermost floor so that the advice value corresponding to the level position on each floor of the N-stop building is recorded in the RAM 8c as shown in FIG. .

The advice thus obtained is used to control the current position of the car and its modification, the generation of the reference speed command for the remaining distance or remaining distance to the landing floor during normal operation of the elevator.

In the present invention of the above method, the car position can be corrected even if the car is out of the level position.

That is, the operating point of the position detector by the plate 10 is, for example, 300 mm above and below the bottom, which is longer than the door zone.

Therefore, when the position detector passes through the plate 10, for example, when the car moves up on the I floor, the microcomputer 8 detects the fall of the output signal 11a of the position detector 11 and the FSY ← FLHU (I ) + DP ₂ , and when passing through the I + 1 layer, the falling edge of the output signal 12a of the position detector 12 is detected, and the operation of FSY ← FLHD (I + 1) + DP ₂ is performed. The position of the car can be corrected by detecting the fall of the output signal 11a of the position detector 11 again and calculating FSY? FLHU (I + 1) + DP ₂ .

In the present invention, the driving pulse of the car is detected in the path of the car → pulley → motor → pulse generator, and FLHD (I) + FLHU (I) and FLHL (I) stored in the RAM 8c are pulleys. Even with age, their relative values are always correct.

In other words, the distance per one pulse increases by a constant rate, so the level position on each floor always shows the correct value.

As described above, according to the present invention, since the location points (for example, 300 mm above and below the floor) of each floor are recorded in the RAM and the level positions of each floor are obtained by the average value of the location points, the level locations on each floor stored in the RAM. The exact position of the car can be corrected even if the car is out of the level position.

In the elevator control apparatus according to the embodiment of the present invention described above, in general, the rising and falling position detectors 11 and 12 exhibit a considerable response delay time, and when the response delay time is ΔT, V xΔ A distance error called T (v is the speed of the car) occurs.

For this reason, when recording advice data, the car 1 must be operated at a low speed in order to reduce the above-mentioned error, and in a building having a long lifting stroke, it takes a lot of time to record the total advice value.

On the other hand, in order to record the advice value while driving the car at a high speed, a position detector having a sufficiently different response speed must be used, and thus there are various problems such as becoming expensive.

Another embodiment of the present invention provides an elevator control apparatus capable of accurately recording a floor stratified value in a memory while driving a car at high speed even when a position detector showing a response delay is used to eliminate the above-mentioned defects.

In order to achieve the above object, the present invention compensates the response delay of the detector by changing the distance correction amount according to the moving speed of the car.

FIG. 9 is a flowchart for explaining the elevator control apparatus according to the second embodiment of the present invention, and shows a case where it is applied to the elevator control apparatus according to the configuration shown in FIGS. 1 and 3, and in this case It is assumed that the program is stored in the read ROM 8b constituting the microcomputer 8.

In FIG. 9, first, in step S ₁ , it is determined whether or not the moving direction of the car 1 is in the ascending direction, and if the determination result is "NO", the return is returned. In case of YES, the process proceeds to step S ₂ . do.

In step S ₂ , the output value DPS of the counting circuit 7 is added to the current position SYNC of the car 1, and the result of the addition is recorded as SYNC, and then the flow advances to step S ₃ . If in the step S ₃ determines whether the rising of the output signal (11a) in the raised position detector (11) and that the determination result is "NO" is returned, in the case of YES, the process moves to step S _4.

In this step S ₄ , after increasing the current position FSY of the car 1 by I, this is substituted into the dummy variable I.

Next in step S ₅ the In car 1 in the moving speed to obtain the correction amount CMPS the distance run a subroutine for the correction amount calculation processing to step S ₆ in accordance with the car 1, the correction amount of the distance from the current position SYNC of CMOS Subtracts the result, assigns the result to FLU (I), and returns.

10th turn and detailed program of the subroutine shown in the ninth step S ₅ degrees proceeds after the In set of the correction amount of the CMPS distance to zero in step S _6a to step _6b S.

Here, the output value DSP of the counting circuit 7 represents the moving distance of the car 1 in each calculation cycle of the central computing device 8a. In this case, however, the calculation cycle of the central computing device 8a is calculated. Since they are always the same, the DSP also represents the car speed.

DPS〈P₂의 경우에는 "1" , P₂≤DPS〈P₃의 경우에는 "2",P₃

DPS의 경우에는 "3"이 된다.Therefore, if steps S _6b- S _6g shown in FIG. 10 are executed, the distance correction amount CMPS becomes "0" when the moving distance DPS of the car in the operation cycle is DPS <P ₁ and P ₁

For DPS <P ₂ in the case of _{"1", P 2 ≤DPS <} P 3 is "2", P ₃

In the case of DPS, it is "3".

That is, since the response delay time DELTA T of the ascending position detector 9 is always constant, a correct position correction is performed accordingly by providing a correction amount at 0-3 pulses corresponding to the speed of the car.

In the above embodiment, only the case where the car rises is described. However, of course, even when the car descends, accurate position correction is performed by the same process.

As described above, in the elevator control apparatus according to the second embodiment of the present invention, since the distance correction amount is set according to the moving speed of the car, even if a time delay occurs in the position detector, the current position of the car is corrected. Even in the case of using a cheap position detector with a slow response speed, the car has a great effect such as accurately recording the floor cocoon while driving the highway.

In any of the embodiments of the present invention described above, the moving distance of the car 1 is not directly measured, but indirectly measured at the rotation speed of the motor 5, so that the slip of the rope 3 and the pulley 2 are aged. The error accumulates due to the decrease in hardness due to the change.

For this reason, in the elevator control device, the current position SYNC is corrected by supplying the output signals 11a and 12a of the rising position detector 11 and the falling position detector 12 to the central computing device 8a. .

For example, if the rising position detector 11 enters the plate of the first layer during the ascending driving and the output signal 11a is generated, SYNC? FLH (I) is executed.

Further, when the falling position detector 12 enters the plate 10 of the I layer on the falling run and the output signal 12a rises, SYNC ← FLP (I) is executed. However, in the correction direction, a distance error of V x DELTA T occurs due to the response delay of the rising position detector 11 and the falling position detector 12.

Where v is the speed of the car and ΔT is the response delay time of the position detectors 11 and 12 for ascending and descending.

Therefore, in the above-described correction method, a sufficient correction cannot be obtained, and a high-speed elevator has a problem that an expensive position detector must be used in order to stop the above correction or reduce the response delay.

In order to solve this problem, a third embodiment of the present invention will be described below. FIG. 11 is a flowchart for explaining an embodiment of the elevator control apparatus according to the third invention, and shows a case where it is applied to the elevator control apparatus according to the configuration shown in FIGS. 1 and 3, and in this case It is assumed that the program is stored in the ROM 8b constituting the microcomputer 8.

In Fig. ₁₁ , first in step S ₁₁ , the current position FSY is moved to the dummy variable I, and then step S ₁₂ is made.

In step S ₁₂ , it is determined whether or not the moving direction of the car 1 is in the upward direction, and if the read result is "NO", the return is returned. In case of "YES", the flow proceeds to step S ₁₂ .

[FVL(I)+FVL(I+1)] 이상 여부의 판정, 즉 카(1)이 층상과 다음 층상의 중간 위치를 통과하였는지의 여부를 팔별하고, 그 판별 결과가 "YES"인 경우에는 스텝 S₁₄로 이행하여 모조변수(I) 및 카(1)의 현재위치 FSY를 각각 I만큼 가산한 후 스텝 S₁₅로 이동한다.In step S ₁₃ , the current position SYNC of the car 1 is

[FVL (I) + FVL (I + 1)] Determination of abnormality, that is, whether car 1 has passed through the intermediate position on the floor and the next floor is discriminated, and the determination result is "YES". after the process is advanced to step S ₁₄ adds the current position of the FSY dummy variables (I) and the car (1) by I, respectively moves to step S _15.

Also, if the determination in step S ₁₃ is "NO", the process proceeds to step S ₁₅ directly.

In step S ₁₅ to determine the increase if the output signal (11a) in the raised position detector (11), and the determination result is "YES" in case the step S by moving ₁₆ the amount of correction of the distance according to the car speed CMPS After execution of the subroutine for determining, the process proceeds to step _S17 .

Using the correction amount CMPS calculated in the step S ₁₆ in the step S ₁₇ is followed by a return correct the current position of the car SYNC (1).

In the case where the determination is "NO" in step S ₁₅ is omitted in the modification of the current car position SYNC followed by returning the value obtained by adding a coefficient circuit (DPS) to the current position of the car SYNC (1) according to S _18.

In operation of step S ₁₆ is not described is the same as the operation shown in Figure 10. By performing such a calculation process, the correct current position can be corrected.

Claims (8)

An elevator control apparatus for controlling elevators traveling on a plurality of floors by a computer, comprising: (a) pulse generating means for generating a pulse proportional to a moving distance of a car. (b) A plurality of plates for position detection corresponding to each of the plurality of floors and provided in a hoistway. (c) It is provided in the car at a position opposite to each of the plates, and the position of the layer is detected by facing the plate, and the predetermined point on the layer and the predetermined point on the layer under the predetermined distance on each layer. Position detectors that emit position signals when points are detected. (d) Storage means capable of reading and writing. (e) means for calculating the position of each predetermined point according to the number of pulses generated by the pulse generating means when a signal having detected the upper and lower peaks for each layer is transmitted; . (f) The elevator control apparatus provided with the means which calculates the position on each floor by the said calculated said predetermined point position, and stores this in the said storage means. The said storing means inputs the angle value which shows the calculation position of each up-down operation point with respect to a certain floor by the said calculation means, calculates the average value of each value, and calculates the said value. Elevator control device which outputs as a position on any floor. 2. The elevator according to claim 1, wherein the position detector outputs a signal indicating that the car is in the layered position within the range even when the car is out of a predetermined amount with respect to the actual layered position when detecting the position on the layered position. Control unit. 2. The plate of claim 1, wherein the plate is provided one for each layer and has two detection elements of the position detector, and each of the two plate elements is detected by the detection or non-detection signal of the plate. An elevator control apparatus in which position and detection of predetermined points of each of the upper and lower sides are performed. 5. The device according to claim 4, wherein one of the two detection elements detects the plate, thereby detecting a predetermined point of the lower or upper phase, and then detecting that the other is out of the plate after facing the plate. Elevator control device for detecting a predetermined point. An elevator control apparatus for controlling elevators traveling on a plurality of floors using a microcomputer, comprising: pulse generating means for generating pulses proportional to the amount of movement of the car, and fixed to the hoistway corresponding to each floor by being installed in the car; A position detector for detecting the plate, a memory capable of reading and writing, means for storing the operating position of the position detector for each floor in the memory, and presetting according to the speed of the car when the memory is stored in the memory. And a means for correcting by adding or subtracting a correction value to an operating position of the position detector. The elevator control apparatus according to claim 6, wherein the correction means performs the addition and subtraction with a large correction value when the speed of the car is large, and the addition and subtraction with the small correction value when the speed of the car is small. In an elevator control apparatus for controlling elevators traveling on a plurality of floors using a microcomputer, a plate fixed to a hoistway corresponding to each floor by providing a number of pulses proportional to the amount of movement of the car to the car and generating means. A position detector for detecting a position, a memory in which advice values for each floor are stored in advance, a current position detecting means for detecting the current position of the car by counting the number of pulses generated by the pulse generating means, and a current position of the car. And setting means for setting in said memory at the time of output of the position detector, and means for adding and subtracting and resetting the preset correction value according to the speed of the car at the time of resetting to said memory by this setting means. Elevator controls.

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