JPWO2016084161A1 - Elevator control device - Google Patents

Abstract

The elevator control apparatus according to the present invention is based on the relative position of the car (4) when the accumulated travel distance of the car (4) after the absolute position of the car (4) is detected is less than the first threshold. The first failure determination is performed on the absolute position detection device (9) and the hoistway side absolute position detection device (10a-10d), and the accumulated travel distance of the car after the absolute position of the car (4) is detected is the first threshold value. In the above case, a failure determination unit (11e) that does not perform the first failure determination is provided. Accordingly, the present invention can prevent erroneous determination of failure of the car-side absolute position detection device and the hoistway-side absolute position detection device.

Description

  The present invention relates to an elevator control device.

  Patent Document 1 discloses an elevator control device. The control device changes the set speed of the car based on the relative position of the car detected based on the rotation of the rotating body that rotates as the car moves. For this reason, a short stroke shock absorber can be applied.

Japanese Unexamined Patent Publication No. 2003-104646

  A car-side absolute position detection device and a hoistway-side absolute value detection device are provided as a double safety device. The car side absolute position detection device and the hoistway side absolute value detection device detect the absolute position of the car independently of the rotation of the rotating body.

  If the absolute position of the car is not properly detected, the speed at which the car collides with the shock absorber can be excessive. For this reason, the failure determination with the cage | basket | car absolute position detection apparatus and the hoistway side absolute value detection apparatus is performed. For example, the failure determination is performed by comparing the absolute position and the relative position of the car. At this time, if the relative position of the car is not properly detected, a failure of the car-side absolute position detection device and the hoistway-side absolute value detection device is erroneously determined.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide an elevator control device that can prevent a failure of a car-side absolute position detection device and a hoistway-side absolute position detection device from being erroneously determined.

  The elevator control device according to the present invention includes a relative position recognition unit that recognizes the relative position of the car based on the rotational speed of the sheave around which the rope attached to the elevator car is wound, and the rotational speed of the sheave. A cumulative travel distance recognition unit for recognizing a cumulative travel distance of the car based on a car absolute position detection device provided in the car and a hoistway side absolute position detection device provided in the elevator hoistway. When the accumulated traveling distance of the car after the absolute position of the car is detected based on the detection result of the other by one side is less than a first threshold, the car-side absolute position detecting device is based on the relative position of the car When a first failure determination is made with respect to the hoistway side absolute position detection device, and the accumulated travel distance of the car after the absolute position of the car is detected is greater than or equal to the first threshold value Equipped with a malfunction determining unit does not perform the first failure judgment.

  According to this invention, the first failure determination is not performed when the cumulative traveling distance of the car is equal to or greater than the first threshold. For this reason, it can prevent erroneous determination of the failure of the car-side absolute position detection device and the hoistway-side absolute position detection device.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an elevator to which an elevator control device according to a first form of the present invention is applied. It is a flowchart for demonstrating the procedure of the 1st failure determination by the control apparatus of the elevator in the actual form 1 of this invention. It is a flowchart for demonstrating the procedure of the 2nd failure determination by the control apparatus of the elevator in the actual form 1 of this invention. It is a figure which shows the position and speed of the elevator car to which the control apparatus of the elevator in the actual form 1 of this invention was applied. It is a figure for demonstrating the relationship between the 1st threshold value, the 2nd threshold value, and the 3rd threshold value which were set to the control apparatus of the elevator in the actual form 1 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the part which is the same or it corresponds in each figure. The overlapping description of the part is appropriately simplified or omitted.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of an elevator to which an elevator control apparatus according to the first embodiment of the present invention is applied.

  In FIG. 1, an elevator hoistway 1 passes through each floor of a building. The hoisting machine 2 is provided in the upper part of the hoistway 1. A sheave (not shown) is provided in the hoisting machine 2. The main rope 3 is wound around the sheave of the hoisting machine 2. The car 4 is provided inside the hoistway 1. The car 4 is suspended on one side of the main rope 3. The car 4 is provided so that a user can ride. The counterweight 5 is provided inside the hoistway 1. The counterweight 5 is suspended on the other side of the main rope 3.

  The governing sheave 6 is provided in the upper part of the hoistway 1. The speed control rope 7 is wound around the speed control sheave 6. A part of the speed control rope 7 is attached to the lower part of the car 4. The car movement amount detection device 8 is provided in the speed control sheave 6. For example, the car movement amount detection device 8 includes an encoder. The car-side absolute position detection device 9 is provided on the upper part of the car 4. The plurality of hoistway side absolute position detection devices are provided on the side wall of the hoistway 1. For example, the four hoistway side absolute position detection devices 10a to 10d are arranged in the vertical direction.

  For example, the control device 11 includes a computer such as a microcomputer. For example, the control device 11 is provided in the upper part of the hoistway 1. The control device 11 is connected to the hoisting machine 2 via a control cable (not shown). The control device 11 is connected to the car movement amount detection device 8 via a control cable. The control device 11 is connected to the car-side absolute position detection device 9 via a control cable.

  The computer of the control device 11 includes a relative position recognition unit 11a, a relative position correction unit 11b, an accumulated travel distance recognition unit 11c, a one-way travel distance recognition unit 11d, and a failure determination unit 11e.

  The control device 11 outputs a rotation command to the hoisting machine 2. The hoisting machine 2 rotates based on the rotation command. The main rope 3 moves following the rotation of the sheave of the hoist 2. The car 4 and the counterweight 5 move up and down following the movement of the main rope 3.

  The governing rope 7 moves following the raising and lowering of the car 4. The governing sheave 6 rotates following the movement of the governing rope 7. The car movement amount detection device 8 detects the movement amount of the car 4 based on the rotation speed of the speed regulating sheave 6. For example, the car movement amount detection device 8 detects the movement amount of the car 4 based on a pulse output corresponding to the rotation speed of the speed regulating sheave 6. The car-side absolute position detection device 9 discretely detects the absolute position of the car 4 by detecting any one of the hoistway-side absolute position detection devices 10a to 10d.

  The relative position recognition unit 11 a recognizes the relative position of the car 4 based on the detection result of the car movement amount detection device 8. For example, when the car movement amount detection device 8 detects that the car 4 has moved upward by 5 m, the relative position recognition unit 11a increases the relative position of the car 4 by 5 m upward.

  The relative position correction unit 11b stores the positions of the hoistway side absolute position detection devices 10a to 10d. The relative position correcting unit 11b corrects the relative position of the car 4 when the car-side absolute position detecting device 9 detects any one of the hoistway-side absolute position detecting devices 10a to 10d. For example, when the hoistway side absolute position detection device 10c is detected, the relative position correction unit 11b corrects the relative position of the car 4 to the distance from the lowest floor of the hoistway side absolute position detection device 10c.

  The cumulative travel distance recognition unit 11 c recognizes the cumulative travel distance of the car 4 based on the detection result of the car movement amount detection device 8. The cumulative travel distance of the car 4 is the sum of the distance traveled regardless of the travel direction of the car 4. For example, when the car 4 moves upward by 5 m and then moves downward by 7 m, the accumulated traveling distance of the car 4 is recognized as 12 m. The accumulated travel distance of the car 4 is reset when the car-side absolute position detection device 9 detects any one of the hoistway-side absolute position detection devices 10a to 10d.

  The one-way travel distance recognition unit 11 d recognizes the travel distance in one direction of the car 4 based on the detection result of the car movement amount detection device 8. For example, when the car 4 moves upward by 7 m, the traveling distance in one direction of the car 4 is recognized as 7 m. Thereafter, when the car 4 moves downward by 5 m, the traveling distance in one direction of the car 4 is recognized as 5 m. For example, when the car 4 moves upward by 7 m, the traveling distance in one direction of the car 4 is recognized as 7 m. Thereafter, when the car 4 moves upward by 8 m, the traveling distance in one direction of the car 4 is recognized as 15 m. The travel distance in one direction of the car 4 is reset when the car-side absolute position detection device 9 detects any one of the hoistway-side absolute position detection devices 10a to 10d.

  The failure determination unit 11e includes a first failure determination unit 11f and a second failure determination unit 11g.

  The first failure determination unit 11f determines the first failure for the car-side absolute position detection device 9 and the hoistway-side absolute position detection device 10a based on the relative position of the car 4 when the cumulative travel distance of the car 4 is less than the first threshold. Make a decision.

  The first failure determination unit 11f performs a first failure on the car-side absolute position detection device 9 and the hoistway-side absolute position detection device 10a based on the relative position of the car 4 when the cumulative travel distance of the car 4 is equal to or greater than the first threshold. Do not make a decision.

  The first threshold value is stored in advance in the first failure determination unit 11f. For example, the first threshold value is set based on the temperature fluctuation amount of the diameter of the governing sheave 6. For example, the first threshold value is set based on the relationship between the accumulated error due to the slip amount of the speed control sheave 6 and the speed control rope 7 and the cumulative travel distance of the car 4. For example, when the relationship that the relative position of the car 4 is shifted by a maximum of 50 mm due to the variation in the diameter of the speed control sheave 6 and the slippage when the cumulative travel distance of the car 4 is 1000 m is confirmed in advance, the first threshold value Is set to 1000 m.

  The second failure determination unit 11g applies to the car side absolute position detection device 9 and the hoistway side absolute position detection device 10a based on the travel distance in one direction of the car 4 when the cumulative travel distance of the car 4 is equal to or greater than the first threshold. A second failure determination is performed.

  As an example, a case where the car 4 passes the hoistway side absolute position detection device 10b upward from the vicinity of the hoistway side absolute position detection device 10c between the hoistway side absolute position detection device 10c and the hoistway side absolute position detection device 10c. Think. At this time, it is assumed that the hoistway side absolute position detection device 10b is out of order.

  When the accumulated travel distance of the car 4 after the car-side absolute position detection device 9 detects the hoistway-side absolute position detection device 10b or 10c is less than the first threshold, the hoistway-side absolute position detection device 10b and the hoistway-side absolute position detection The traveling frequency of the car 4 is low with respect to the device 10c. For this reason, the cumulative error of the relative position of the car 4 is small. In this case, when the car 4 passes the hoistway side absolute position detection device 10b, the difference between the relative position of the car 4 and the position of the hoistway side absolute position detection device 10b is equal to or greater than the second threshold value. At this time, the first failure determination unit 11f determines that the failure is at least one of the car-side absolute position detection device 9 and the hoistway-side absolute position detection device 10b.

  The second threshold value is stored in advance in the first failure determination unit 11f. For example, the second threshold value is determined when the car 4 travels the distance of the first threshold value based on the detection position shift amount due to the detection delay of the car-side absolute position detection device 9 and the longitudinal vibration of the car 4 when the car 4 travels. It is set to a value added with the accumulated error. For example, the second threshold value is set to 550 mm, which is a value obtained by adding a cumulative error of 50 mm when the car 4 travels a distance of 1000 m, which is the first threshold value, to the detection position deviation amount of 500 mm.

  When the accumulated traveling time of the car 4 after the car-side absolute position detecting device 9 detects either the hoistway-side absolute position detecting device 10b or 10c is equal to or greater than the first threshold value, the hoistway-side absolute position detecting device 10b and the hoistway-side absolute The traveling frequency of the car 4 is high with respect to the position detection device 10c. For this reason, the accumulated error of the relative position of the car 4 is large. In this case, when the car 4 passes through the hoistway side absolute position detection device 10b and travels to the vicinity of the hoistway side absolute position detection device 10a, the hoistway side absolute position detection device 10b and the hoistway side absolute position detection device 10c set in advance are set. And the travel distance in one direction of the car 4 are equal to or greater than the third threshold. At this time, the second failure determination unit 11g determines a failure of at least one of the car-side absolute position detection device 9 and the hoistway-side absolute position detection device 10b.

  The third threshold value is stored in advance in the second failure determination unit 11g. For example, the third threshold value is set to the detection position shift amount due to the detection delay of the two hoistway side absolute position detection devices 10 a and the like during the traveling of the car 4 and the vertical vibration of the car 4. For example, the third threshold value is set to 1000 mm, which is twice the detection position deviation amount of 500 mm.

Next, the first failure determination procedure will be described with reference to FIG.
FIG. 2 is a flowchart for explaining a procedure for determining a first failure by the elevator control apparatus according to the first embodiment of the present invention.

  The flow of FIG. 2 is executed in a cycle set in advance in the first failure determination unit 11f. In step S1, the first failure determination unit 11f determines whether or not the cumulative travel distance of the car 4 is equal to or greater than a first threshold value.

  If the accumulated travel distance of the car 4 is less than the first threshold value in step S1, the process proceeds to step S2. In step S2, the first failure determination unit 11f determines whether or not the difference between the position of the hoistway side absolute position detection device 10a and the like and the relative position of the car 4 is equal to or greater than a second threshold value.

  If the difference is less than the second threshold value in step S2, the process proceeds to step S3. In step S3, the first failure determination unit 11f determines that the car-side absolute position detection device 9, the hoistway-side absolute position detection device 10a, and the like are normal.

  If the difference is greater than or equal to the second threshold value in step S2, the process proceeds to step S4. In step S4, the first failure determination unit 11f determines that at least one of the car-side absolute position detection device 9, the hoistway-side absolute position detection device 10a, and the like has a failure.

  If the cumulative travel distance of the car 4 is greater than or equal to the first threshold value in step S1, the first failure determination unit 11f holds the failure determination.

Next, the second failure determination procedure will be described with reference to FIG.
FIG. 3 is a flowchart for explaining a procedure for determining a second failure by the elevator control apparatus according to the first embodiment of the present invention.

  The flow of FIG. 3 is executed in a cycle set in advance in the second failure determination unit 11g. In step S11, the second failure determination unit 11g determines whether the cumulative travel distance of the car 4 is equal to or greater than the first threshold value.

  If the cumulative travel distance of the car 4 is less than the first threshold value in step S11, the failure determination unit 11e suspends the failure determination.

  If the accumulated travel distance of the car 4 is greater than or equal to the first threshold value in step S11, the process proceeds to step S12. In step S12, the second failure determination unit 11g determines whether or not the difference between the distance between the adjacent hoistway side absolute position detection devices 10a and the like and the traveling distance in one direction of the car 4 is equal to or greater than a third threshold value.

  If the difference is less than the third threshold value in step S12, the process proceeds to step S13. In step S13, the second failure determination unit 11g determines that the car-side absolute position detection device 9, the adjacent hoistway-side absolute position detection device 10a, and the like are normal.

  If the difference is greater than or equal to the third threshold value in step S12, the process proceeds to step S14. In step S14, the failure determination unit 11e determines that at least one of the car-side absolute position detection device 9 and the adjacent hoistway-side absolute position detection device 10a is in failure.

Next, the influence of the second threshold value on a terminal floor forced deceleration device (not shown) will be described with reference to FIG.
FIG. 4 is a diagram showing the position and speed of an elevator car to which the elevator control apparatus according to the first embodiment of the present invention is applied. The horizontal axis in FIG. 4 is the speed of the car (monitoring speed). The vertical axis in FIG. 4 is the position of the car.

  When the terminal floor forced deceleration device is provided, the speed limit section is set between the hoistway side absolute position detection device 10a and the hoistway side absolute position detection device 10b. At this time, the second threshold is set as an allowable deviation in the distance between the hoistway side absolute position detection device 10a and the hoistway side absolute position detection device 10b. In this case, the range of the speed limit section is closer to the uppermost floor by the second threshold than the hoistway side absolute position detection device 10a.

  At this time, the speed limit is lowered from VLVL to VLVL ′ in order to ensure safety on the top floor. When the speed of the car 4 exceeds VLVL ′, the terminal floor forced reduction device operates. As a result, the car 4 comes to an emergency stop. For this reason, the second threshold value and the VLVL ′ are set so that the car 4 does not stop urgently during the normal running of the car 4. The first threshold is set so that the accumulated error added to the second threshold is as small as possible.

Next, the relationship among the first threshold, the second threshold, and the third threshold will be described with reference to FIG.
FIG. 5 is a diagram for explaining the relationship among the first threshold value, the second threshold value, and the third threshold value set in the elevator control apparatus according to the first aspect of the present invention.

  The accumulated error of the relative position of the car 4 is proportional to the accumulated travel distance of the car 4. As shown on the left side of FIG. 5, when the cumulative travel distance of the car 4 is smaller than the first threshold, the cumulative error of the relative position of the car 4 does not significantly affect the second threshold.

  However, the first threshold value is set based on the accumulated traveling distance of the car 4 when the influence of the accumulated error of the relative position of the car 4 cannot be ignored. Therefore, as shown on the right side of FIG. 5, when the cumulative travel distance of the car 4 is larger than the first threshold, the cumulative error of the relative position of the car 4 has a great influence on the second threshold.

  On the other hand, the accumulated error of the traveling distance in one direction of the car 4 is set by accumulating the measured values of the short distance from the traveling of the car 4 to the stop. At this time, the accumulated error of the traveling distance in one direction of the car 4 is independent of the magnitude of the accumulated traveling distance of the car 4. For this reason, the accumulated error of the traveling distance in one direction of the car 4 does not have a great influence on the third threshold value.

  According to the first embodiment described above, the first failure determination is not performed when the cumulative travel distance of the car 4 is equal to or greater than the first threshold. For this reason, it is possible to prevent a failure of the car-side absolute position detection device 9 and the hoistway-side absolute position detection device 10a from being erroneously determined. As a result, it is possible to prevent the serviceability of the elevator from deteriorating, such as the stop of the car 4 due to erroneous determination of failure.

  Further, when the cumulative travel distance of the car 4 is equal to or greater than the first threshold, the second failure determination is performed based on the travel distance in one direction of the car 4. In the traveling distance of the car 4 in one direction, the influence of the accumulated error due to the temperature fluctuation of the speed control sheave 6 is small. For this reason, it is possible to determine the failure of the car-side absolute position detection device 9, the hoistway-side absolute position detection device 10a, and the like while eliminating the influence of the accumulated error due to the traveling of the car 4.

  The traveling distance 14 in one direction of the car 4 may be a value from the start of the second failure determination until the cumulative traveling distance of the car 4 becomes equal to or more than the first threshold again. For example, when the car 4 is moved upward by 7 m and then moved upward by 8 m, the traveling distance 14 in one direction is recognized as 15 m.

  The second failure determination unit 11g resets the travel distance in one direction of the car 4 when the cumulative travel distance of the car 4 again exceeds the first threshold after the start of the second failure determination, and then again determines the second failure. Can be done. In this case, even if the car 4 repeats short-distance travel and the cumulative error due to temperature fluctuation of the speed control sheave 6 increases, the influence of the error of the cumulative travel distance of the car 4 is eliminated, and the car-side absolute position is eliminated. The failure determination of the detection device 9 and the hoistway side absolute position detection device 10a can be continued.

  Further, the relative position of the car 4 may be recognized based on the rotational speed of the sheave around which the main rope 3 is wound.

  The absolute position of the car 4 may be output to the control device 11 from the hoistway side absolute position detection device 10a or the like.

  As described above, the elevator control device according to the present invention can be used in a system that prevents erroneous determination of a car-side absolute position detection device and a hoistway-side absolute position detection device.

1 hoistway, 2 hoisting machine, 3 main rope, 4 basket, 5 counterweight, 6
Speed control sheave, 7 speed control rope, 8 car movement amount detection device, 9 car side absolute position detection device, 10a to 10d hoistway side absolute position detection device, 11 control device, 11a relative position recognition unit, 11b relative position correction unit, 11c Cumulative mileage recognition unit, 11d
One-way travel distance recognition unit, 11e failure determination unit, 11f first failure determination unit, 11g
Second failure determination unit

Claims (4)

A relative position recognition unit for recognizing the relative position of the car based on the rotational speed of the sheave around which the rope attached to the elevator car is wound;
A cumulative travel distance recognition unit that recognizes the cumulative travel distance of the car based on the rotational speed of the sheave;
The absolute position of the car is detected based on the other detection result by one of the car-side absolute position detection device provided in the car and the hoistway-side absolute position detection device provided in the elevator hoistway. If the cumulative travel distance of the car from the vehicle is less than a first threshold, a first failure determination is performed for the car-side absolute position detection device and the hoistway-side absolute position detection device based on the relative position of the car, and the car A failure determination unit that does not perform the first failure determination when the cumulative travel distance of the car after the absolute position is detected is equal to or greater than the first threshold;
Elevator control device. A one-way travel distance recognition unit for recognizing a travel distance in one direction of the car based on the rotational speed of the sheave;
With
In the failure determination unit, the absolute position of the car is detected based on the other detection result by one of the car-side absolute position detection device and the plurality of hoistway-side absolute position detection devices provided in the hoistway. When the cumulative travel distance of the car since the absolute position of the car was previously detected is equal to or greater than a first threshold, the travel distance in one direction of the car recognized by the one-way travel distance recognition unit is determined. The elevator control device according to claim 1, wherein a second failure determination is made for the car-side absolute position detection device and the hoistway-side absolute position detection device based on the second failure determination.   The failure determination unit detects the car-side absolute position when a difference between the position of the hoistway-side absolute position detection device and the relative position of the car set in advance at the time of the first failure determination is equal to or greater than a second threshold value. The elevator control device according to claim 1, wherein at least one of the device and the hoistway side absolute position detection device is determined to be faulty.   When the difference between the distance between adjacent hoistway-side absolute position detection devices set in advance at the time of the second failure determination and the traveling distance in one direction of the car is equal to or greater than a third threshold, The elevator control device according to claim 2, wherein at least one of the car-side absolute position detection device and the adjacent hoistway-side absolute position detection device is determined to be faulty.

Images