In this load cell the force transferring medium would be air, so when the fluid applies force on the sensing part of the load cell then it would transfer this force to the inside air and this force will be transferred to the potentiometer and it is in contact with the Wheatstone bridge. The sensing element of this load cell will be introduced to the place where the liquid weight or the pressure is to be measured. This type of load cell operates by using the force balance principle. The high temperature would affect the wire.It can’t be used to measure high capacities, or for weight measurement.The output doesn’t need any amplification because the produced signals don’t have low voltage.The measurement is done by checking the varying frequency and because of this it is not affected by the change in the cable resistance.So if we apply load in this load cell then the tension of the internal vibrating wire would increase, and due to this the frequency of the wire would change and this change in frequency will be proportional to the applied weight and it can be measured. This device is composed of a vibrating wire transducer and it would be fixed in a metallic cylinder and it can be used to check the tensile loads in batch systems and also in process weighing systems. This type of load cell can also be used to measure the level In order to generate the output, it would need an amplification circuit, due to the fact that the signals which are created by the gauge are very low voltage.It can’t be used for the pressure measurement of highly reactive or corrosive material because it could badly affect the gauge.Electrical energy is required for the entire operation.Load cells are classified according to their operation Each of the wires would perform as a separate sensor for the measurement of the load at that portion and the average value will be taken to get the actual load. There could be a problem where the load is not uniformly distributed because of the eccentric loading, a multi-wire system is used to solve this problem by averaging the load in different wires. So a load cell would do the measurement of the force according to the strain that it receives. The load cell would only work if there is any change in the strain gauge resistance and this change can be measured with the help of a wheat-stone bridge. The sensor (strain gauge) in this device would work if there is any compression, so if there is any variation in the length of the wire then there would be a change in frequency. The strain gauge would go through physical variation because of the movement in the strain gauge and at the same time, its resistivity will be varied too. So if the strain is placed in the load cell it would be stretched due to force or strain and thus the strain gauge movement could occur. It must be selected according to the environmental condition like if there is a presence of moisture above the limit could affect thisĪ load cell consists of strain gauges, the strain gauges are elastic materials and are made up of stainless steel.Changes in temperature should be considered.The frequency of the oscillation should be considered. It must be selected according to the size.What is Creep in pressure vessel? How to detect Creep?.What is a manometer and for what purpose it is used?.What is a barometer and what is it used for?.What is a piezo-meter and what are its types?.What is a multivariable transmitter and what are its uses?.Mostly one or more load cell is used to measure the force on a scale. The load cell operates in a way that if a force is exerted in a specified manner then the load cell would create an output that will be proportional to the applied force. The load cell can be used to measure weight it can be used to measure small things such as a needle to heavy things such as drilling machines. The load cell can be considered as a force transducer because it can convert the weight or force into an electrical signal. A load cell is a kind of transducer that would convert force into electrical output and this would be easily readable.
0 Comments
Leave a Reply. |