The draw-wire displacement sensor is also called a draw-wire sensor, a draw-wire electronic ruler, or a draw-wire encoder. The draw-wire displacement sensor is a sophisticated structural construction of a linear displacement sensor. It fully combines the advantages of an angle sensor and a linear displacement sensor to become a sensor with a small installation size, compact structure, large measuring stroke, and high accuracy. The stroke ranges from hundreds of millimeters to tens of meters. A draw-wire sensor (also called a string pot, cable extension transducer）is a linear position sensor that measures the displacement or velocity of a moving object. It works by converting the linear motion of a flexible measuring wire into a rotary motion, which is then translated into an electrical signal.

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Pulling-rope displacement sensor is widely used in hydraulic universal testing machine. Its main function is to measure the cylinder stroke of the testing machine, and send it to the controller by pulse signal during the test, so as to obtain the elongation of the tested material. If traditional scale or manual measurement is used, it will not only be inefficient, but also fail to achieve the measured test accuracy. However, the pulling rope displacement sensor has the characteristics of high accuracy of 0.01%, fast response speed, low cost and convenient installation. Compared with grating ruler and other products, it not only improves the displacement accuracy of testing machine, but also reduces the cost of the whole machine.

Pulling rope displacement sensor is a precision device that measures displacement by stretching and retracting the rope, widely used in industrial automation, mechanical manufacturing and other fields. The core principles, application scenarios, and usage methods are as follows:

The pull rope displacement sensor is especially suitable for linear guide rail system, hydraulic cylinder system, testing machine, telescopic system (forklift, press, elevator, pipe bender, bender, etc.), crane or cable winch, reservoir dam protection system, gate opening control system, testing machine pressure machinery, hydraulic universal experimental machinery, storage position positioning, pressure machinery, paper-making machinery, textile machinery, sheet metal machinery, packaging machinery, printing machinery. Construction machinery, horizontal controller, construction machinery, industrial robot, injection machine, woodworking machinery, elevator, air compressor/hydraulic press, height machine, X-Y axis and other length displacement, etc., dimension measurement and position control, especially suitable for the control of electro-hydraulic servo hydraulic universal testing machine.

Draw wire sensor is also called rope ruler and rope encoder. Its working principle is very simple, that is, the wire rope at the outlet of the sensor is pulled, in which the wire rope is wound on a pulley built in the sensor. When the wire rope is pulled, the other end of the sensor is connected to the mechanical motion, and a display is installed on it to convert the mechanical motion into an electrical signal to obtain the required data. In operation, the pull rope displacement sensor is installed at a fixed position, and the pull rope is tied to the moving object. The linear motion of the pull rope is aligned with the motion axis of the moving object. When the movement occurs, the rope stretches and contracts. An internal spring ensures that the tension of the pull rope is constant. The threaded hub drives the precision rotation sensor to rotate, and outputs an electrical signal proportional to the moving distance of the pull rope. The displacement, direction or velocity of the moving object can be obtained by measuring the output signal. Commonly used parameters include measuring stroke, output signal mode, linearity, repeatability, resolution, wire diameter specification, outlet tension, maximum round-trip speed, weight, input resistance, power, working voltage, working temperature, vibration, protection level, etc.

Rope displacement sensor, also known as rope sensor, rope electronic ruler and rope encoder, is a kind of sensor used to measure linear position. It combines the advantages of angle sensor and linear displacement sensor, and has the characteristics of small installation size, compact structure, large measuring stroke and high precision, ranging from hundreds of millimeters to tens of meters. Measuring the opening of the gate: the pull-rope/linear displacement sensor can directly measure the displacement of the gate leaf or arm, thus indirectly reflecting the opening of the gate.

The steel wire rope of the on-site rope position sensor broke. In response to this situation, the displacement sensor manufacturer has compiled the causes and consequences of the broken steel wire rope of the rope displacement sensor. They hope that in the selection process, customers can avoid detours and reduce cost losses. The main reasons for wire rope breakage in rope displacement sensors are as follows:

The rope displacement sensor has the advantages of wide measurement range, high resolution, good repeatability, and strong anti-interference ability.

Because of its unique product characteristics, the draw wire transducer is widely used in many fields, such as machinery manufacturing, construction engineering, aerospace, automation control and so on.