What is the function of the hydraulic cylinder displacement sensor in the hydraulic cylinder?

The main function is to ensure the precise displacement of the piston rod.

How it works. Potentiometer-type displacement sensor.

displacement sensor (Figure 2).

It converts mechanical displacement into a resistive or voltage output with a linear or arbitrary function through a potentiometer element. Both a normal linear potentiometer and a circular potentiometer can be used as linear and angular displacement sensors, respectively. However, potentiometers designed for the purpose of measuring displacement require a definite relationship between the change in displacement and the change in resistance.

Movable brushes for potentiometer-type displacement sensors.

Connected to the object being measured.

The displacement of the object causes a change in the resistance of the moving end of the potentiometer. The change in resistance reflects the magnitude of the displacement, and whether the resistance increases or decreases indicates the direction of the displacement. A supply voltage is usually applied to the potentiometer to convert the resistance change into a voltage output.

The output characteristics of wirewound potentiometers are also stepped due to the fact that the resistance of the wirewound potentiometer changes in turn resistance as the brush moves. If this displacement sensor is in the servo system.

, an excessively large step voltage will cause the system to oscillate. Therefore, in the manufacture of potentiometers, the resistance value of each turn should be reduced as much as possible. Another major disadvantage of potentiometer sensors is their ease of wear.

Its advantages are: simple structure, large output signal, easy to use, and low cost.

The main purpose is for the precise displacement of the piston rod so that the basic requirements and functions of some mechanical actions can be guaranteed.

The main thing is to control the precise displacement of the piston rod to realize the function of the actuator.

First of all, you need to know what a hydraulic cylinder is, and secondly, you need to know what the sensor is for.

1.Sensor failure: If the sensor is physically damaged or electronically malfunctioning, it may result in the value not being displayed.

You can determine if the sensor is working properly by checking that the indicator light on the sensor is working properly and that the cable that connects the sensor is in place.

2.Sensor connection issues: The sensor may not be properly connected to the machine, or the connection is loose, which can also cause the sensor to not work properly. You can check that the connection between the sensor and the machine is secure, or try to reconnect the sensor.

4.Control system problems: The signal from the grinding cavity sensor may not be read correctly by the control system, resulting in the failure to display the normal value. You can check the settings of the control system, or try restarting the control system to see if that resolves the issue.

To sum up, if so, it is recommended to check whether the sensor itself is working properly and look for other possible causes so that they can be ruled out and resolved.

There are many reasons why the external displacement stroke sensor of the large hydraulic cylinder does not display the value, such as sensor damage, power failure, poor signal cable connection, etc. Further investigation and troubleshooting are required to determine the specific cause.

Dear, according to your question, here for you, the hydraulic cylinder is a hydraulic synchronous system that can realize the simultaneous control of displacement and force, in order to realize the movement of multiple actuators at the same displacement, the same force or equal speed. Due to the large load force or layout of large equipment, multiple hydraulic actuators need to be set up to drive an actuator at the same time. For example, at present, the hydraulic circuit of the steel trolley under the cooling bed of the high-speed bar line is controlled by the valve group of a group of large-flow electro-hydraulic reversing valves, and the hydraulic cylinders of multiple groups are controlled in parallel by the valve group of a group of small-flow electromagnetic reversing valves, or the valve groups of multiple groups of small-flow electromagnetic reversing valves are controlled by multiple groups of hydraulic cylinders.

However, such control is difficult to ensure that the hydraulic cylinder acts at the same time, and the trolley can only be moved after the hydraulic cylinder is all raised, so the action time is extended; And the inconsistent speed rise and fall will have the phenomenon of steel stacking, which will affect the output and the quality of the hole front. In view of this, it is necessary to design a high-precision synchronous hydraulic system device to improve the synchronization accuracy and shorten the operation time.

The pushing device acts as a hydraulic cylinder, which consists of an inner diameter that pushes the hydraulic piston and an outer diameter, which is the storage space for the liquid. The push device plays the role of a hydraulic cylinder, it is a kind of connection between the liquid pressure piston and the hydraulic oil piston and the hydraulic oil piston cylinder, the function of the push device is: the hydraulic piston pushes the inner diameter from the outer diameter under the effect of the pushing device, presses the liquid into the hydraulic cylinder, forms a forward pressure, so that the liquid can pass through the hydraulic piston, so that the hydraulic system can play an effective role.

Let's make a shelf first and install it in the right place. You can send me your drawings to see and help you choose a method.

The magnetic tape is more accurate in measuring the liquid level, what are you on? There is no need to use a magnetic tape to measure the jack with a conventional photoelectric displacement sensor, depending on your application environment to determine the installation also depends on your equipment drawings, the size of the sensor and the installation location are determined according to the site

Magnetostrictive displacement sensor, measuring range 0 50 5000mm, standard signal output, accuracy can be reached, mainly used in cylinder displacement measurement.

Features: Non-contact measurement.

High precision (high stability, high reliability.)

Long service life.

High performance** ratio.

A variety of standard output methods are available.

It has the function of reverse polarity protection of the input power supply.

Lightning protection, exquisite structure, easy installation, strong environmental adaptability.

No regular calibration and maintenance is required.

Applications: servo hydraulic cylinder piston position feedback or preset.

Servo cylinder piston displacement feedback or preset.

Grinding mechanical position feedback or presets.

Forging machine tool displacement control.

Positioning and monitoring of injection molding machine templates.

Positioning control for woodworking.

Other mechanical positioning and displacement detection.

Detection and control of the opening of the gas resistance valve of the steam turbine.

Detection and control of guide vane opening of hydraulic turbine.

Reel roll displacement control.

Liquefied gas level control.

Level measurement of oil tanks and chemical tanks.

According to the conservation of mass of the central rodless cavity, it can be obtained:

v1*d1^2=v2*d2^2

There is a rod cavity on the left side: qv1=v1*pi 4(d1 2-d1 2) on the right side: qv2=v2*pi 4(d2 2-d2 2) The above three formulas are combined, and the ternary system of linear equations. Solve.

How much drifted?

1. The hydraulic oil itself can be compressed (mainly because of the dissolved gas inside the hydraulic oil), and when the external load changes (or the temperature changes), the volume of the cylinder closed cavity will also change, and the piston position will drift, and the value will be less than 2% of the stroke.

2 Hydraulic oil closures with less rigid components, such as high-pressure hoses, can also cause the piston to drift.

3. The sealing of the piston and the sealing of the hydraulic valve have small leakage, and the drift is obvious when the pressure holding time is long.

There is a problem with your system, and it is possible that your sensor is not calibrated.