The HTS-JA4-01 cost-effective quartz accelerometers is a high-precision quartz flexible accelerometer notable for its reliability and stability in extreme operating conditions. It is designed for critical applications that demand exceptional accuracy, such as in aerospace, defense, and seismic monitoring.

Core technology and operating principle

The HTS-JA4-01 likely functions as a servo-accelerometer, using a force-balance principle to measure acceleration. 

Quartz flexible sensing element: When an external acceleration is applied, it causes a small displacement in a pendulum or proof mass within the sensor's quartz structure. The quartz material is prized for its high fatigue resistance and low hysteresis.

•  Capacitance detection: The movement of the quartz element alters the capacitance between it and fixed plates. This capacitance change is detected and used as an error signal.

•  Digital closed-loop feedback: A dedicated servo circuit applies an electromagnetic force to counteract the displacement and restore the pendulum to its null position. The current required to re-center the pendulum is directly proportional to the applied acceleration.

•  Built-in temperature compensation: An optional built-in temperature sensor allows the device to compensate for thermal drift, ensuring stable performance across a wide temperature range. 

Key performance specifications

Based on the available HTS-JA4 series data, the HTS-JA4-01 model is distinguished by its superior precision. 

Measurement range:≥±30𝑔.

Bias: A low bias of ≤±10𝑚𝑔.

Bias repeatability: Excellent repeatability of ≤±50 ug over one month.

Bias temperature coefficient: A low tempreature sensitivity of ±50 ug/ ℃

Scale factor: The output current-to-acceleration ratio is 1.1 t0 1.4 mA/g.

Output: Continuous anolog current output, wchih can be digitized for processing.

Applications in high-stakes environments

The robust design and high-accuracy specifications of the HTS-JA4-01 make it suitable for demanding applications in several sectors. 

•  Aerospace and defense: Core component of high-precision inertial navigation systems (INS) for missiles, aircraft, and spacecraft.

•  Seismic monitoring: Used to detect and monitor seismic activity due to its high sensitivity and low noise floor.

•  Industrial: Provides high-precision motion sensing for control and stability systems in equipment like high-speed trains, ships, and drilling systems.

•  Precision instrument vibration isolation: Employed in applications requiring the testing and isolation of subtle vibrations in sensitive equipment.

•  Civil engineering: Used for measuring the inclination of large structures like bridges and dams.