JPH072439A - Hydraulic elevator controller - Google Patents

Abstract

(57) [Summary] [Structure] Before the floor height measurement operation is performed at elevator startup,
Accelerate the car with a preset acceleration in the speed control circuit, calculate the actual car acceleration from the pulse count output from the pulse encoder, or convert it to the car speed control pulse, then compare it with the reference pulse length to obtain the difference A hydraulic elevator control device that creates a car speed control pulse that is close to ideal and uses it for each operation while setting the reference pulse length so that there is no [Effect] The acceleration / deceleration control of the elevator car having higher reliability than the conventional elevator control device can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic elevator control device, and more particularly to learning the mechanical variation of the response of a solenoid valve used for controlling the speed of a car to obtain the optimum pulse for the response of the solenoid valve. TECHNICAL FIELD The present invention relates to a control device for an elevator that operates a solenoid valve for a long time.

[0002]

2. Description of the Related Art In a conventional hydraulic elevator PWM control system, when operating a car speed control solenoid valve,
Regarding the operation pulse length of the solenoid valve, the operation pulse length was set to a constant value in accordance with the solenoid valve having a slow mechanical response.

[0003]

In the prior art, when the solenoid valve is operated, the operating pulse length is set to a constant value. Therefore, the pulse length is set according to the slow response due to variations in the response of the solenoid valve. Because I have to
There is a problem in that the solenoid valve is additionally operated by the difference between the fast response and the slow response, which affects the elevator speed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator control device which realizes more accurate and stable acceleration / deceleration in the elevator acceleration / deceleration control.

[0005]

In order to achieve the above object, the present invention sets a reference solenoid valve operation pulse length value for a test prepared in a software program for controlling a car speed before a floor height measuring operation. Based on learning the optimum pulse length for the response of each solenoid valve currently in use, the result is combined with the pulse length calculated by the speed control circuit to utilize the pulse for acceleration / deceleration control of various operations. Is.

[0006]

As described above, since the acceleration / deceleration control can be performed with the pulse length that matches the variation of the response of the solenoid valve, the inoperable failure rate of the car in various operations of the hydraulic elevator is reduced, and the car pops out during inching operation. It is possible to realize more reliable elevator acceleration / deceleration control such as reduction of phenomena and smooth car acceleration / deceleration control during normal operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

First, the configuration of this embodiment will be described. FIG. 1 shows the configuration of a control system according to an embodiment of the present invention. In the figure, 1 is a hoistway of a hydraulic elevator, 2 is a cylinder buried in the lower part of the hoistway 1, 3 is pressure oil filled inside the cylinder 2, 4 is a plunger supported by the pressure oil 3, Reference numeral 5 is a car fixed to the top of the plunger 4, and 6 is an inductive position detector (positor) provided on the car 5, which detects the door zone and the stop position when the shield plates 7 and 8 are opposed. Reference numeral 11 denotes a pulse encoder for detecting the speed and position of the car, which is directly connected to a pulley 9 provided at the bottom of the hoistway 1. The pulley 9 rotates in synchronism with the movement of the car through a pulley 10 at the top and a rope 11a fixed to the car 5. 12 is a solenoid valve SU
A pipe line through which the pressure oil 3 is fed into the cylinder 2 by the ascending main control valve UV and the descending main control valve DV controlled by H, SUL, SDH, and SDL.
It is connected to a pump 13 that sucks the pressure oil 3 by a motor 14 driven by 5. 26 is a speed control circuit,
The ascending speed command SPU and the descending speed command SPD are output, and the ascending solenoid valve drive circuit 36 and the ascending solenoid valve drive circuit 37 receive them and reflect them on the solenoid valve to control the speed of the car.

Next, the basic driving operation of this embodiment will be described.

Before the floor height measuring operation is performed at the time of starting the elevator, the car is accelerated with a preset acceleration in the speed control circuit 26, and the actual car is calculated by the number of output pulses called PULS output from the pulse encoder 11. After calculating the acceleration and converting the calculated value into a car speed control pulse, the reference pulse length is reset so that the difference approaches 0 by comparing the converted pulse length and the reference pulse length, and a car speed control pulse close to ideal is created. , Utilize for each driving.

Details of this embodiment will be described.

FIG. 2 is a solenoid valve response time calculation flowchart of this embodiment.

Step 100 is data initialization of the program created by the present invention, and step 200 is to accelerate the car with a variable pulse 51 of 10% of the release time of the rising main control valve UV in order to confirm that the car is operable. Then, after calculating the actual acceleration of the car by the count number of the pulse PULS output from the pulse encoder 11, it is converted into the speed control pulse of the solenoid valve, and the pulse length converted in step 200 and the software program in the speed control circuit 26 are converted. In step 300, the reference pulse length set in step 1 is compared. As a result of the comparison, when the solenoid valve does not operate, the intermediate value between the minimum response pulse length value and the reference pulse length value is reset to the reference pulse length as in step 401, and when the solenoid valve operates, the operation in step 402 is performed. Thus, the intermediate value between the maximum response pulse length value and the reference pulse length value is reset to the reference pulse length. This operation is repeated several times in steps 500 and 600 to approach the response time of the solenoid valve, and in step 700 the solenoid valve forced closing time 50 (FIG. 3) during acceleration / deceleration of each operation is set. The system configuration is such that the calculation result is reset in 26 and utilized for the car speed control pulse of each operation.

The car speed control pulse for operating the solenoid valve will be described.

FIG. 3 is a comparison of the cage speed control pulse 40 for operating the solenoid valve, the rising / falling waveform 41 of the solenoid valve, and the solenoid valve optimum operation pulse 42. The car speed control pulse includes a forced closing time 50 and a variable pulse 51.

The forced closing time 50 is the pulse length set under the worst condition of the response time of the solenoid valve. Currently, the response time varies like the rising / falling waveform 41 of the solenoid valve. Also the solenoid valve is designed to be driven.

However, in the case of a fast response, there is a problem that the cage speed jumps out due to the margin 52, and in the case of a slow response, there is a problem that the solenoid valve does not respond. Can be learned, the margin 52 can be almost deleted, and the compulsory closing time 50 of the solenoid valve optimum operation pulse 42 that solves the above problem can be created.

The variable pulse 51 is used for the speed command circuit 2
Change the pulse length by the speed command sent from 6,
The car acceleration is changed according to the change.

[0019]

As described above, according to the present invention, it is possible to provide a control device with higher accuracy than the conventional control device for a hydraulic elevator.

[Brief description of drawings]

FIG. 1 is a block diagram of a hydraulic elevator.

FIG. 2 is a flowchart of a solenoid valve operation start time calculation software program.

FIG. 3 is an explanatory view of old and new electromagnetic valve operation waveforms.

[Explanation of symbols]

3 ... Pressure oil, 4 ... Plunger, 5 ... Basket, 6 ... Induction type position detector (positor), 7, 8 ... Shielding plate, 9 ... Lower pulley, 10 ... Upper pulley, 11 ... Pulse encoder, 12
… Pipeline, 13… Pump, 14… Motor, 15… Power supply, 1
6 ... tank.

Claims (1)

[Claims] 1. A hydraulic jack comprising a cylinder and a plunger for raising and lowering a car in a hoistway, and a pump for connecting the cylinder to a discharge side through a check valve to supply pressure oil to the cylinder to raise the car. An electric motor that drives the pump, a rise control valve that is provided in a bypass from the discharge side of the pump to the pressure oil tank and that controls the flow rate of bypass pressure oil to control the rise of the car, and the cylinder A lowering control valve that is provided in a return line to the pressure oil tank and that controls the lowering of the car by adjusting the flow rate of the pressure oil that flows out, and a control device that controls the ascending control valve and the descending control valve are provided. In a hydraulic elevator, the variation in the response of each of the ascending control valve and the descending control valve operated by applying a pulse signal for a predetermined time is learned, and the learning result is used. It calculates an optimum pulse length to the solenoid valve operation control system for a hydraulic elevator, characterized in the calculated pulse length to operate the increase control valve and the lowering control valve.