Speed sensors are machines used to detect the speed of a transport vehicle.
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There are kinds of grip gauges, and the spring scale is the simplest type of dynamometer. The dynamometer is used to lift the object vertically. When the spring dynamometer and the object are both stationary, it means that the object is subject to the balance force, that is, the force of gravity and tension is a pair of balance forces and the sizes are equal. The force of the object on the dynamometer is The dynamometer's pulling force on the object is equal to the force and reaction force, so the reading is the gravity of the measured object. According to F=k·X (Hooke's law), the force is proportional to the spring elongation. Coulomb Torsion Scale: The torque of the suspension wire can provide physicists with a way to measure very small forces. The torsional moment is proportional to the torsion angle of the suspension wire and is proportional to the fourth power of the suspension wire diameter and is inversely proportional to the length of the suspension wire. The main part of the Coulomb torsion balance is a metal filament fixed at the top and suspended at the bottom. The object rotates under the action of the external force to twist the metal wire. When the torsion angle is measured, the external force can be calculated according to the law of torsion.
Scales: The principle of scales is measured on the basis of force, but on the Earth, in the reference system (inertial frame of reference) where the Earth is considered to be immobile, scales say the result is “correctâ€. Because the acceleration of gravity was taken at 9.8 N/kg. If it is on the moon, what is said is not "correct" because the scales see the acceleration of gravity as 9.8 N/kg. In fact, the gravitational acceleration on the moon is much less than this.
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Using the elasticity of metal to make an instrument marked with a scale to measure the force, it is called "dynamometer". Dynamometers come in a variety of different configurations, but the main part of them is curved spring steel or spiral springs. When the external force causes deformation of the elastic steel sheet or spring, the pointer is rotated by a lever and other transmission mechanism, and the pointer is stopped at the position on the dial, which is a digital dynamometer for external force in pharmaceuticals, cosmetics, food, packaging, automobiles Various industries such as electronics, electronics, and machinery are widely used. It is an indispensable measuring tool in product manufacturing, quality management, and research and development. It is a new type of dynamometer with perfect data management function. It can be connected to the computer through the USB interface. It can perform rapid peak measurement of 1000 times/second. It can set the upper limit value and lower limit value to judge whether the product is qualified. It can also be used with a dynamometer stand for high-precision measurement.