Accurate measurement platform control system

Abstract

The utility model discloses an accurate measurement platform control system, which belongs to the technical field of railway measurement and comprises a man-machine interaction device, a BSM module, a PLC (programmable logic controller), a matched pneumatic clamping mechanism, a cooling water tank and a steel rail conveyor. The man-machine interaction device, the BSM module and the PLC are connected in parallel through an RS-485 bus, and MODBUS protocol communication is adopted; an MC communication protocol is arranged between the man-machine interaction device and the PLC. And an output terminal of the PLC is respectively connected with an oil pump start-stop control relay and a roller way advance and retreat control frequency converter in the steel rail conveyor to control the steel rail conveyor. The BSM module is connected with a water pump control relay in the cooling water tank and an air cylinder telescopic control electromagnetic valve in the clamping mechanism to control the cooling water tank. According to the utility model, the working states of the oil pump, the sudden stop, the rail running speed, the rail running direction, the clamp, the water pump and the like are integrated in one control platform, and the panel touch screen is used for controlling, so that the running of the long steel rail can be controlled more accurately, efficiently and safely, and the safety of operators is ensured.

Description

TECHNICAL FIELD

[0002] This utility model relates to the field of railway measurement technology, specifically a precision measurement platform control system. BACKGROUND

[0004] With the rapid development of high-speed railways, the requirements for the quality of railway line products are becoming increasingly stringent. The straightness of welded joints directly affects the smoothness of high-speed train operation and passenger comfort. Currently, the straightness measurement of most rail welding bases' visual inspection stations still relies on manual operation and intervention, resulting in low automation and susceptibility to measurement errors due to human factors. Manually pressing buttons to move long rails on roller conveyors is complex and carries the risk of rail collisions. Existing precision measurement platforms are prone to instability, such as large fluctuations in measurement data, which seriously affect the continuity and reliability of measurements. In summary, rail welding base precision measurement platforms have many shortcomings in terms of accuracy, stability, and intelligence, necessitating a safe and efficient precision measurement platform control system to address these issues. SUMMARY

[0006] To address the aforementioned problems, this utility model proposes a precision measurement platform control system, which has the advantages of being simple to use, having a fast dynamic response, high positioning accuracy, good system stability, and accurate measurement data, thus solving the problems of difficult measurement operations, cumbersome processes, and low accuracy in existing measurement systems.

[0007] The precision measurement platform control system of this utility model includes an actuator consisting of a pneumatic clamping mechanism, a cooling water tank, and a rail conveying mechanism, as well as a control part consisting of a human-machine interface device, a BSM module, and a PLC.

[0008] The human-machine interface device, BSM module, and PLC are connected in parallel via an RS-485 bus.

[0009] The BSM module connects the water pump in the cooling water tank to the cylinder in the pneumatic clamping mechanism.

[0010] The PLC is connected to the oil pump start / stop control relay, the rail clamping / releasing control relay, and the frequency converter in the rail conveyor.

[0011] The advantages of this utility model are:

[0012] 1. The precision measurement platform control system of this utility model integrates the working status of the rail conveyor oil pump, emergency stop, rail speed, rail direction, pneumatic clamping mechanism cylinder, water pump, etc. into one control platform, which is controlled through the panel touch screen. It can control the movement of long rails more accurately, efficiently and safely, and ensure the safety of operators.

[0013] 2. The precision measurement platform control system of this utility model controls the locking state of the long steel rail of the work station roller conveyor to keep it in a locked and clamped state, which can ensure that the operators can work in a safe state of being stopped and locked. Setting the watering time of the welding joint can better control the surface temperature of the welding joint, ensure the accuracy of the straightness measurement of the welding joint, and improve production efficiency.

[0014] 3. Compared with traditional operation methods, the precision measurement platform control system of this utility model is simple to operate and easy to learn. It is safer and more reliable to control the running status and speed of long steel rails at the appearance inspection position. BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 This is a block diagram of the control system of the precision measurement platform of this utility model.

[0017] In the picture:

[0018] 1- Human-Machine Interface (HMI) 2- BSM Module 3- PLC 4- Pneumatic Support Mechanism

[0019] 5-Cooling water tank 6-Rail conveyor DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] The precision measurement platform control system of this utility model consists of a control part consisting of 1, BSM module 2, and PLC 3, and an execution part consisting of a pneumatic clamping mechanism 4, a cooling water tank 5, and a rail conveyor 6.

[0023] The human-machine interface device 1, BSM2, and PLC3 modules are connected in parallel via an RS-485 bus and communicate using the MODBUS protocol. The human-machine interface device 1 and PLC3 also share Mitsubishi's MC communication protocol, which allows for the establishment of a connection between the touchscreen and a PLC of the same type, enabling real-time monitoring and management of the system's operating status. The aforementioned human-machine interface device is model MT8101i, featuring a simple and intuitive interface design, sensitive touch response, and ease of observation and operation.

[0024] The PLC3, an fX3U series PLC, is used to send control signals to the rail conveyor and collect operating status information from the rail conveyor. PLC3 output terminals Y0-Y17 represent different outputs; here, PLC3 output terminals Y0 and Y1 are connected to relays controlling the start and stop of the oil pump in the rail conveyor, respectively; PLC3 output terminals Y2 and Y3 are connected to relays controlling the clamping and releasing of the rail conveyor, respectively; PLC3 output terminals Y6 and Y7 are connected to the forward and reverse terminals of the frequency converter, respectively; and PLC3 output terminals Y10 and Y11 are connected to the fast and slow terminals of the frequency converter, respectively. Furthermore, based on the control signals sent by the human-machine interface device 1, PLC3 controls the opening and closing of the hydraulic solenoid valves via relays to achieve the start and stop control of the oil pump in the rail conveyor; and controls the forward and backward movement of the roller conveyor via the frequency converter.

[0025] The BSM module 2 is model 0404RB. BSM module 2 connects to the relay in the cooling water tank 5 used to control the contactor's engagement and disengagement, and to the pneumatic solenoid valve in the pneumatic clamping mechanism used to control the cylinder's extension and retraction. Furthermore, BSM module 2 receives control signals from the human-machine interface, controls the contactor's engagement and disengagement via the relay to start and stop the water pump in the cooling water tank 5; and controls the cylinder's extension and retraction via the pneumatic solenoid valve to achieve the clamping action of the pneumatic clamping mechanism 4 on the platform used to clamp and position the steel rails. The cooling water pump is connected to a water storage tank and is responsible for cooling the welded joint by spraying water at set intervals; the clamping cylinder 4, composed of a cylinder and a clamping block, is responsible for locking the steel rails on the precision measurement platform's roller conveyor line.

[0026] This utility model's precision measurement platform control system integrates the working status of the oil pump, emergency stop, rail speed, rail direction, clamps, and water pump in the precision measurement platform used for measuring the straightness of welded joints at the rail welding base's appearance inspection station into a single control platform. Program control and parameter setting are achieved through a BSM module, PLC, and human-machine interface (HMI), with distributed centralized control via a touchscreen panel. This enables more precise and efficient control of the long rail movement, ensuring the accuracy and stability of the precision measurement platform during the measurement of welded joint straightness, while also guaranteeing the safety of the operators.

Claims

1. A precision measurement platform control system, comprising a pneumatic clamping mechanism, a cooling water tank, and a rail conveyor; characterized in that: It also includes a control section consisting of human-computer interaction devices, BSM modules, and PLCs; The human-machine interaction device, BSM module and PLC are connected in parallel via RS-485 bus; The BSM module connects the water pump in the cooling water tank to the cylinder in the pneumatic clamping mechanism. The PLC is connected to the oil pump start / stop control relay, the rail clamping and releasing control relay, and the frequency converter in the rail conveyor.

2. The precision measurement platform control system as described in claim 1, characterized in that: The PLC's output terminals Y0 and Y1 are connected to relays that control the start and stop of the oil pump in the rail conveyor, respectively; output terminals Y2 and Y3 are connected to relays that control the clamping and releasing of the rail conveyor, respectively; output terminals Y6 and Y7 are connected to the forward and reverse terminals of the frequency converter in the rail conveyor, respectively; and output terminals Y10 and Y11 are connected to the fast and slow terminals of the frequency converter in the rail conveyor, respectively.

3. The precision measurement platform control system as described in claim 1, characterized in that: The BSM module connects to the relay in the cooling water tank that controls the contactor's engagement and disengagement, and the contactor controls the water pump's operation.

4. The precision measurement platform control system as described in claim 1, characterized in that: The BSM module connects to the pneumatic solenoid valve in the pneumatic clamping mechanism that controls the extension and retraction of the cylinder.

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