Installation method of draw-wire displacement sensor for external installation of cylinder displacement:

In the field of industrial automation, accurate measurement of cylinder displacement is crucial for the stable operation and efficient production of equipment. The draw-wire displacement sensor, with its advantages of high precision and high reliability, has become an ideal choice for measuring cylinder displacement. This article will introduce in detail the specific method of applying the draw-wire displacement sensor for external installation of cylinder displacement.

I. Preparation before installation

1. Equipment selection: According to factors such as the working stroke, precision requirements, and working environment of the cylinder, select a draw-wire displacement sensor with appropriate range, precision, and protection level. For example, for a cylinder with a stroke of 1 - 2 meters, a sensor with a range of about 2.5 meters can be selected to ensure that the measurement range covers the maximum stroke of the cylinder; if there is dust and moisture in the working environment, a sensor with a protection level of at least IP65 should be selected.

2. Tool and material preparation: Prepare the tools required for installation, such as wrenches, screwdrivers, electric drills, etc., as well as supporting installation brackets, bolts, nuts, cable wires and other materials. The installation bracket needs to be customized according to the structure of the cylinder and the sensor to ensure that the two can be firmly connected. The materials should have sufficient strength and corrosion resistance.

II. Installation steps

1. Determine the installation location: On the outside of the cylinder barrel, select a flat location that is convenient for installation and does not affect the normal operation of the cylinder. Generally speaking, the side of the cylinder near the extending end of the piston rod is a relatively ideal installation point, so that the draw-wire can naturally extend and reduce friction and interference. At the same time, ensure that the installation location is parallel to the movement direction of the cylinder to avoid measurement errors caused by angular deviations.

2. Fix the installation bracket: Drill holes at the selected location with an electric drill and firmly fix the installation bracket on the cylinder barrel with bolts. The fixation of the installation bracket must ensure horizontal or vertical, and a level gauge can be used for calibration to avoid inclination and affect the measurement accuracy of the sensor. During the installation process, pay attention to the tightening force of the bolts. It is necessary to ensure that the bracket is stable and not cause deformation of the cylinder barrel due to excessive tightening.

3. Sensor installation: Install the draw-wire displacement sensor on the bracket and ensure that the outlet of the sensor is in the same direction as the movement direction of the cylinder piston rod. Use the supporting bolts and nuts to fix the sensor on the bracket. During the tightening process, pay attention to the installation angle of the sensor to keep it in a horizontal or vertical state, and control the error within a very small range. Some sensors may need to fine-tune the installation angle by adjusting shims to achieve the best measurement state.

4. Draw-wire connection: Reliably connect the end of the draw-wire to the cylinder piston rod. Common connection methods are to connect through a special connector. The connector should be tightly matched with the connection part of the piston rod to prevent loosening or falling off during the movement of the cylinder. When connecting, ensure that the draw-wire is in a naturally extended state without twisting or knotting. At the same time, reserve a certain degree of slack to avoid generating additional tension on the draw-wire during the movement of the cylinder, which affects the measurement accuracy and sensor life.

5. Electrical connection: According to the electrical interface type of the sensor, select an appropriate cable for connection. Generally, the draw-wire displacement sensor will provide standard electrical interfaces such as RS485 and analog output. Connect one end of the cable to the electrical interface of the sensor to ensure a firm connection and good contact, and avoid unstable signal transmission caused by false connections. Connect the other end of the cable to the control system or data acquisition device. During the connection process, pay attention to following electrical safety specifications to avoid problems such as short circuits and leakage.

III. Installation debugging and precautions:

1. Installation debugging: After the installation is completed, debug the draw-wire displacement sensor. First, manually push the cylinder piston rod and observe the stretching and retracting situation of the draw-wire to ensure that the draw-wire moves smoothly without jamming. Then, read the output signal of the sensor through the control system or data acquisition device to check whether the signal is normal and stable. Perform zero calibration and range calibration on the sensor. According to the actual stroke and precision requirements of the cylinder, adjust the output parameters of the sensor to make its measured value consistent with the actual displacement value. During the calibration process, measure different displacement positions of the cylinder multiple times and take the average value for calibration to improve measurement accuracy.

2. Precautions: During the installation and use process, avoid the draw-wire being impacted and squeezed by external forces to prevent measurement failures caused by draw-wire damage. Regularly inspect the sensor and installation bracket to check for looseness, deformation, etc., and tighten and repair in time. At the same time, pay attention to the influence of the working environment on the sensor. Environmental factors such as high temperature, high humidity, and strong electromagnetic interference may affect the performance and life of the sensor. If necessary, take corresponding protective measures such as installing heat insulation covers, moisture-proof boxes, and electromagnetic shielding devices.

During the external installation process of the draw-wire displacement sensor for cylinder displacement, through strict preparation before installation, standardized installation steps, and careful installation debugging and precautions control, accurate measurement of cylinder displacement can be achieved, providing reliable data support for the stable operation of industrial equipment and improving production efficiency and product quality.