Quartz Flexible Accelerometer Typical Application

The force balance accelerometer is the most widely used in inertial navigation system, among which the quartz flexible accelerometer is the most representative one. It is a mechanical pendulum accelerometer that integrates the flexible support part and the capacitive sensor, so it has the advantages of simple structure, small size, high precision and sensitivity, low power consumption, light weight, high reliability, and easy miniaturization. In recent years, autopilot, strapdown and platform inertial navigation systems have used this device as the first choice. It is also widely used in aviation flight control system, microgravity measurement, satellite orbit control, ships and military vehicles and other servo control fields. With the continuous progress of quartz flexible accelerometer application technology, there is a huge potential demand for civilian applications in recent years, quartz flexible accelerometer application in the civil field has been developed by leaps and bounds, especially the growing demand in the field of petroleum exploration, has successfully led the development of quartz flexible accelerometer technology in a new direction.

Application

Petroleum exploration

Accelerometer sensors are mainly used in drilling inclinometer system and continuous inclinometer system of oil drilling to measure the slope of drilling. When observing with a clinometer, the probe moves from the bottom of the clinometer tube to the top, pauses and measures the tilt at a distance of half a meter. The tilt of the probe is measured by two balanced servo accelerometers. An accelerometer measures the longitudinal position of the groove of the inclinometer tube, that is, the inclination of the plane on which the inclinometer probe is located. The other accelerometer measures the inclination perpendicular to the plane of the wheel. The inclination can be converted into lateral displacement. Comparing the current and initial observational data, it is possible to determine the amount of lateral migration change and show the movement displacement occurring in the formation. Plotting the change in the offset gives a high resolution displacement profile. This profile helps determine the magnitude, depth, direction, and rate of ground motion displacement. ER-QA-03D can work normally at temperatures ranging from -55 to 180 ° C, and ensures bias repeatability <50μg and standard factor repeatability <50μg.

Inertial navigation and guidance system

Navigation guidance systems for missiles, aircraft, ships, and chariots must have speed and position information. In the case of low requirements, people use airspeed meters, Mach number sensors, odometers, etc., but with the performance requirements of the weapon system. Improve, the above instruments can not meet the requirements. The line accelerometer can be installed in a moving object to directly measure its acceleration, and then obtain the speed and position. The measurement accuracy is high and the dynamic performance is good, which is much better than the airspeed meter and the odometer. Therefore, linear accelerometers are one of the most important applications for inertial navigation guidance systems.

Tilt measurement and leveling system

In the gravitational field, a line accelerometer can measure changes in gravitational acceleration. When the sensitive axis is perpendicular to the horizontal plane, the accelerometer indicates the unit of gravity acceleration; if the sensitive axis is tilted, the output is the product of the gravitational acceleration and the sinusoidal function of the tilt angle. Using this principle, it can be used as tilt measurement and leveling. For example, the fire control gun sight radar, air defense radar leveling; in addition, by measuring the lateral acceleration of the train, the car to control the tilt angle, so that it can still run at high speed on the curve.

Overload switch

The overload switch is used for the bullet spreading system of the mother missile. In this system, the motion acceleration of the female projectile at the expected height is calculated and set by the ballistics. The axial acceleration of the overloaded switch mounted on the bomb, when the preset acceleration is reached, the overload switch outputs a bullet to dissipate the control signal, ignites the projectile, and causes the bullet to be thrown from the female projectile. A number of bullets are like a net woven into a bomb, so that the target being hit has nowhere to hide. It is a powerful weapon against enemy positions and large equipment.

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