COMPENSATION-TYPE ACCELEROMETER Russian patent published in 2014 - IPC G01P15/13 

FIELD: measurement equipment.

SUBSTANCE: compensation-type accelerometer comprises inertia element (1), oscillating system (2), displacement transducer (3), balancing circuit amplifier (4), inverse converter (5), scaling resistor connection assembly (6), and temperature compensating amplifier (7). To a negative feedback circuit of a temperature compensating amplifier there connected between its inverting input and a feedback resistor is a circuit consisting of temperature sensor R₀₁ shunted with resistor R_"Ш1", the electrical resistance value of which is chosen based on the following: where where K_∑(t) - compensated value of temperature instability of a conversion factor of an accelerometer; K_t0(t₀), K_t0(Δt₁), K_t0(Δt₂) - temperature characteristic of a temperature compensating amplifier at switched-off temperature sensors under conditions of action of rated, reduced and increased working temperatures of the accelerometer respectively; K_A(t₀), K_A(Δt₁), K_A(Δt₂) - temperature characteristic of the accelerometer at switched-off temperature sensors under conditions of action of rated, reduced and increased working temperatures of the accelerometer respectively; K_t(t₀), K_t(Δt₁), K_t(Δt₂) - temperature characteristic of the chosen configuration of a temperature compensating amplifier under conditions of action of rated, reduced and increased working temperatures of the accelerometer respectively; R₀, R₀₁ - electrical resistance of copper coils connected to the input of the temperature compensating amplifier and to its negative feedback circuit respectively, at rated value of environment; α_R, α_M - temperature coefficient of resistance of resistors R_"П", R_"П1" and copper coils R₀, R₀₁ respectively; Δt - increase of ambient air temperature value of the accelerometer relative to its rated value. Connection of two temperature sensors to a circuit of the temperature compensating amplifier allows linearising compensated temperature characteristic of the accelerometer.

EFFECT: reduction of temperature instability of conversion factor of the accelerometer and reduction of labour intensity of its temperature adjustment process.

3 dwg

А - A

ОС - FB

М - M

Ш - "Ш"

П - "П"