CN203552052U - Control cabinet test bench - Google Patents

Abstract

A control cabinet test bench comprises a test bench main body, a servo driver, a servo motor and an encoder, the test bench main body comprises a host computer and a controller connected with the host computer, the encoder and the servo driver are respectively connected with the servo motor, and the host computer is connected with the servo driver through the controller. The control cabinet test bench has the beneficial effects that the servo motor is driven by the servo driver to operate, the host computer and the controller control the servo motor to operate and drive the encoder to generate car position deviation signals required for tests, and the car position deviation signals are transmitted to a control cabinet to be tested; and operating data output from the control cabinet to be tested is acquired and monitored by the test bench main body, and therefore a control cabinet with a position feedback function can be tested.

Description

Control cabinet test bench

technical field

The utility model relates to the field of elevator equipment detection, in particular to a control cabinet test bench.

Background technique

With the development of the elevator industry, people have higher and higher requirements for the running speed of the elevator. In recent years, a kind of ultra-high-speed elevator has appeared. Due to the speed of the ultra-high-speed elevator, the steel wire rope may slip during the start-stop phase, or the steel wire rope will stretch and contract when people enter and exit the car, causing the leveling position to change, resulting in insufficient leveling accuracy or even failure of the elevator. Therefore, an encoder will be added to the control of the ultra-high-speed elevator. The encoder is integrated with the speed limiter of the elevator car and moves with the speed limiter, and feeds back the position signal of the car to the control cabinet of the elevator. The control cabinet According to the feedback signal, the traction machine is controlled to make some adjustments during the next run to compensate the position deviation of the car caused by the above problems, so that the elevator maintains a high leveling accuracy.

The control cabinet test bench is a tool for testing various performance indicators of the elevator control cabinet. The general control cabinet test bench is designed for the control cabinet of ordinary elevators. Its main structure includes the host computer and controller, but it cannot test the control cabinet of ultra-high-speed elevators with position feedback function.

Utility model content

Based on this, it is necessary to address the problems in the prior art and provide a control cabinet test bench capable of testing elevator control cabinets with a position feedback function.

A test bench for a control cabinet, including a main body of the test bench, a servo driver, a servo motor, and an encoder. The main body of the test bench includes a host computer and a controller connected to the host computer. The encoder and the servo driver are respectively connected to the servo motor. The controller is connected with the servo driver.

The above-mentioned control cabinet test bench, the upper computer and the controller of the main body of the test bench constitute a signal simulation and monitoring system. Servo drive, servo motor and absolute position encoder replace the speed limiter in the elevator system to generate the position deviation signal when the elevator is running. The servo driver drives the servo motor to work, while the upper computer and the controller control the servo motor to run, drive the encoder to generate the deviation signal of the car position required for the test, and then transmit the deviation signal of the car position to the control cabinet under test, and then test The main body of the station collects and monitors the operating data output by the tested control cabinet, so as to realize the purpose of testing the control cabinet with position feedback function.

Description of drawings

Fig. 1 is the structural representation of the control cabinet test bench of a kind of embodiment of the present utility model;

Fig. 2 is the working principle block diagram of the control cabinet test bench of an embodiment of the present invention;

The meanings of the symbols in the figure are:

100-test bench body, 200-servo drive, 300-servo, 400-absolute encoder, 500-tested control cabinet, 600-traction machine.

Detailed ways

Embodiments of the utility model are described in detail below in conjunction with the accompanying drawings.

With reference to Fig. 1 and Fig. 2, a kind of control cabinet test bench comprises test bench main body 100, servo driver 200, servo motor 300 and encoder, and test bench main body 100 includes host computer and controller connected with host computer, encoder and The servo drivers 200 are connected to the servo motors 300 respectively, and the host computer is connected to the servo drivers 200 through a controller.

As a preferred solution, the encoder in this embodiment adopts an absolute encoder 400 . Its advantages are: because each position is absolutely unique, anti-interference, and does not require power-down memory, it has been more and more widely used in angle, length measurement and positioning control in various industrial systems, so it can ensure that the position in this embodiment The accuracy of feedback improves the accuracy of test results. Under circumstances known by those skilled in the art, other types of encoders can be used to achieve the same or close effect as the absolute encoder 400, such as incremental encoders.

As a preferred solution, the controller in this embodiment adopts a programmable controller. Its advantages are: programmable controller is an electronic system for digital operation, which is specially designed for application in industrial environment. It uses a memory that can be programmed to execute instructions for storing logic operations and sequence control, timing, counting, and arithmetic operations, and controls various types of mechanical equipment through digital or analog input structure ports and output interfaces. or production process. Other types of controllers can be used to achieve effects equal to or close to those of programmable controllers, as known to those skilled in the art.

The upper computer uses a computer to communicate with the programmable controller through the communication bus. The output point of the programmable controller is connected to the input point of the control cabinet 500 under test, and the input point of the programmable controller is connected to the output point of the control cabinet 500 under test. Specific connection methods: such as connecting with the control cabinet via a serial communication board and/or directly connecting with the control cabinet.

When testing the position feedback function of the control cabinet: the upper computer controls the servo driver 200 through the programmable controller, drives the servo motor 300 to run, generates the elevator car position deviation signal, and then the absolute encoder 400 transmits the generated car position deviation signal The control cabinet 500 under test, the control cabinet 500 under test fine-tunes the traction machine 600 of the elevator according to the car position deviation signal, and at the same time the programmable controller is connected to the main engine encoder on the traction machine 600 of the elevator to collect the data of the traction machine 600 The operating status is fed back to the host computer. The equipment of the speed limiter in the elevator system is relatively bulky. Although the position deviation signal required for the test can be generated directly by using the speed limiter and the encoder, it is very troublesome to test. Here, the servo drive 200, servo The electric appliance and the absolute encoder 400 are used to replace the speed limiter and the encoder in the elevator system, which not only achieves the test effect, but also simplifies the test equipment and reduces the implementation cost required for the test.

When testing the normal functions of the control cabinet: the upper computer issues operation instructions to the programmable controller, and the programmable controller outputs corresponding signals to the elevator control cabinet according to the instructions issued by the upper computer, and at the same time, the programmable controller quickly detects the operating status of the elevator. A series of action states are uploaded to the host computer, and the host computer records the feedback information of the programmable controller, including the input and output signals of the tested control cabinet 500, and judges the status of the tested control cabinet 500 by comparing the logical relationship between the input and output signals. Check the correctness of the main circuit, power circuit, signal circuit, control circuit, safety circuit, AC circuit and alarm circuit, and display the test results.

The above-mentioned control cabinet test bench, the upper computer and the programmable controller of the test bench main body 100 form a signal simulation and monitoring system. The servo driver 200, the servo motor 300 and the absolute position encoder replace the speed limiter in the elevator system to generate a position deviation signal when the elevator is running. The servo driver 200 drives the servo motor 300 to work, and at the same time, the upper computer and the programmable controller control the servo motor 300 to run, drive the absolute encoder 400 to generate the deviation signal of the car position required for the test, and then transmit the deviation signal of the car position To the control cabinet 500 under test, the control cabinet 500 under test processes the deviation signal of the car position to obtain the operation data, and then the test bench main body 100 collects and monitors the operation data output by the control cabinet 500 under test, so as to realize the The purpose of testing the control cabinet with position feedback function.

In one of the embodiments, the test bench main body 100 also includes a display, which is connected to the host computer. The upper computer displays the detected data through the display, such as pictures, color changes, text, sound and other forms, which are very intuitively displayed to the testing personnel.

In one of the embodiments, the main body of the test bench 100 is a box structure, the front of the main body of the test bench is provided with a door, the rear of the main body of the test bench and the left and right sides are provided with detachable side panels, and the lower part of the side panels is provided with ventilation holes. . The main body 100 of the test bench is a box structure, which is convenient for placement. Testers can adjust the equipment inside the test bench main body 100 by opening or closing the door in front of the test bench main body; The main body 100 is assembled and disassembled, and the lower part of the side plate is provided with ventilation holes, which can enhance the heat dissipation effect of the main body 100 of the test bench.

In one of the embodiments, the bottom of the test bench body 100 is provided with universal wheels. Universal wheels make it easy for testers to move the device.

In one of the embodiments, the main body 100 of the test bench is also provided with an exhaust fan. The exhaust fan can enhance the heat dissipation effect of the main body 100 of the test bench, and avoid affecting the operation of the equipment due to the high internal temperature of the main body 100 of the test bench.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (7)

1. a control cabinet test bench, is characterized in that, comprises test bench main body, servo driver, servo motor and encoder, and described test bench main body comprises upper computer and the controller that is connected with upper computer, and described encoder and servo The drivers are respectively connected with the servo motors, and the upper computer is connected with the servo drivers through the controller. 2. The control cabinet test bench according to claim 1, wherein the encoder is an absolute encoder or an incremental encoder. 3. The control cabinet test bench according to claim 1, wherein the controller is a programmable controller. 4 . The control cabinet test bench according to claim 1 , wherein the main body of the test bench further includes a display, and the display is connected to a host computer. 5. The control cabinet test bench according to claim 1, wherein the main body of the test bench is a box structure, the front of the main body of the test bench is provided with a door, and the back and left and right sides of the main body of the test bench are A detachable side panel is provided, and a ventilation hole is provided at the lower part of the side panel. 6. The control cabinet test bench according to claim 1, wherein the bottom of the test bench body is provided with universal wheels. 7. The control cabinet test bench according to any one of claims 1 to 6, characterized in that the main body of the test bench is also provided with an exhaust fan.

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