79results about How to "Compensation for measurement errors" patented technology

The invention discloses a compensating device and a method for line motion error of a rotary accelerometer and a gravity gradiometer. The device comprises a line motion detecting module, a reference signal generating module, a line motion error transmission coefficient processing module, a line motion error compensation signal generating module, and a self-gradient compensation signal generating module. The line motion detecting module detects the acceleration of the gravity gradiometer in real-time. The reference signal generating module generates a quadrature amplitude modulated carrier in real-time. The line motion error transmission coefficient processing module adjusts a line motion error transmission coefficient in real time according to a fed back and compensated gravity gradiometersignal. The line motion error compensation signal generating module generates a line motion error compensation signal according to the input gravity gradiometer acceleration signal, the quadrature amplitude modulated carrier, and the line motion error transmission coefficient. The self-gradient compensation signal generating module generates a self-gradient compensation signal according to the attitude of the gravity gradiometer. The method compensates before the demodulation of the gravity gradiometer signal, which can compensate the line motion error and the self-gradient of the gravity gradiometer, and can solve the problem of overvoltage circuit saturation and overvoltage circuit damage caused by the self-gradient and line motion error of the gravity gradiometer.

An apparatus for detection of the accuracy of format of a web of corrugated cardboard moved in a conveying direction comprises a light source which emits a light band to the surface of the web of corrugated cardboard in a direction crosswise of the conveying direction and at an angle to the web of corrugated cardboard. A measuring camera detects the different light intensities of the light reflected by the plane portions and the profiled patterns of the web of corrugated cardboard. This electronic image in the camera is evaluated by an evaluation device for determining the distance of the profiled patterns from each other.

The invention discloses a soft touch type horizontal or vertical intraocular pressure measuring device and method. The device comprises a small magnetic needle pressure measuring probe, a detection front-end device, a signal drive conditioning circuit, an intraocular pressure instrument moving posture sensing array, a DSP core processing unit, an LCD and a wireless printing module. The method comprises the following steps: detecting a posture of the intraocular pressure instrument in real time, acquiring triaxial acceleration, driving a small magnetic needle to softly touch the eyeball at a constant speed and to apply a certain pressure to the eyeball so as to allow the central cornea to deform by generating exciting current in an electrified solenoid drive coil, recording a current signal fed back in the small magnetic needle reciprocating process by virtue of an induction coil, and calculating the forced acceleration of the intraocular pressure according to the current signal fed back by the induction coil, the measurement time and the triaxial acceleration converted quantity; and calculating the actual measured intraocular pressure value by combining a linear regression equation according to the forced acceleration of the intraocular pressure and the central cornea thickness CCT. The method disclosed by the invention is an accurate horizontal or vertical intraocular pressure measuring method, and great convenience is provided for patients suffering from eye diseases and diagnosis and treatment physicians.