High Quality Road milling sensor (2137341/161455) 04-20-30070) string Controller For w2000/w2100/w150 milling machine

Road milling sensor (2137341/161455) 04-20-30070) string Controller

1. Function and Purpose

Its core function is to monitor the height of the reference and transmit signals to the main controller to automatically adjust the depth of the milling drum, ensuring the road surface achieves the preset smoothness or slope.

Height Sensing: The sensor works by detecting an external reference. This reference can be a taut wire stringline, a fixed curb, or an existing unmilled road surface.

Signal Transmission: The sensor internally converts detected mechanical position changes or distance variations into electrical signals.

Depth Control: The main controller receives the sensor's signals and compares them to the desired depth or slope value set by the operator. The controller then sends commands to adjust the planer's track or milling drum hydraulic cylinders, achieving fine-tuning of the milling depth to ensure a very smooth milled surface.

2. Types and Operation

Depending on the type of reference it detects, this sensor typically comes in two forms, and the name "String Controller" strongly suggests it is primarily designed for mechanical stringline reference:

Mechanical Sensor / Sonde: Equipped with a movable mechanical arm. During operation, the arm rests directly on the reference wire stringline or curb. The up-and-down movement of the arm is converted into an electrical signal. This is the most classic and reliable leveling method, especially suitable for projects requiring high precision.

Non-Contact Ultrasonic Sensor: Measures the distance from the sensor to the road surface reference (e.g., existing surface) by emitting and receiving ultrasonic waves. This method does not require setting up a physical wire, making setup faster, but its accuracy and anti-interference ability may be slightly lower than the mechanical type.

The "String Controller" may refer to the entire control unit that integrates the function of receiving and processing signals from the mechanical sensor.

3. Location

The sensor is typically mounted on the left side, right side, or front/rear ends of the planer's track frame (or body) using a dedicated sensor mounting bracket. The mounting position must ensure it can stably contact the reference (wire string or road surface).