The invention discloses a special pseudorandom sequence dither frequency control oscillator A variable current source network and a current source phase of the oscillator are connected with the oscillator after being connected in parallel, the oscillator is connected with a frequency dividing circuit, the frequency dividing circuit is sequentially connected with a random clock generator and a self-starting pseudorandom sequence generator, and then the self-starting pseudorandom sequence generator is connected with the variable current source network to constitute a closed circuit The invention is used for making the oscillator in a power source management chip realize frequency change on the basis of the change of frequency change interval time to dither according to a pseudorandom mode, simulate pseudorandom noise and avoid introducing a novel frequency component in the dither frequency modulation process of the conventional dither frequency oscillator, so that the electromagnetic radiation is greatly reduced, and the environment test need of a switch power source is met The special pseudorandom sequence dither frequency control oscillator is suitable for all PS (power source) series AC-DC (alternating current to direct current) isolated or non-isolated switch power source controllers

Special pseudorandom sequence dither frequency control oscillator

The invention discloses a compass circuit high in precision and low in cost, and an implementation method. The compass circuit comprises an exciting circuit, a magnet exciting coil circuit, an induction coil circuit, a phase discrimination circuit, an amplification filter circuit and an error correction circuit, wherein the exciting circuit generates excitation signals which excite the magnet exciting coil circuit; the magnet exciting coil circuit generates a magnetic field; the induction coil circuit creates induced voltage carrying with geomagnetic field information; the phase discrimination circuit converts the carried geomagnetic field information in second harmonic components of circuit induction signals of two channels of induction coils into weak direct-current voltage; the amplification filter circuit amplifies and filters the signals output by the phase discrimination circuit, so that two channels of direct-current voltage reflecting changes of the geomagnetic field directly are formed; and the error correction circuit is used for eliminating errors caused by the fact that parameters of the two channels of the coils and the circuit are inconsistent. The compass circuit and the implementation method have the benefits of high precision and low cost, and is simple in structure, convenient to adjust and suitable for mass production.

Compass circuit high in precision and low in cost, and implementation method

The invention belongs to a laser gyroscope technology, and relates to a method for preciously measuring the dynamic lock region of a laser gyroscope. The method comprises the following steps: successively changing the sensitive axis of the gyroscope and the northern inclination angle near an east +/-alpha0 angle in a small angle and interval manner by using the component of the rotational angular velocity of the earth of 0 in order to change the gyroscope sensitive input angular velocity, maintaining every inclination angle position for a period of time, recording the output pulse number of the gyroscope in the position, and drafting a curve of the output pulse number of the gyroscope and the input earth velocity component to accurately obtain the dynamic lock region of the gyroscope. The above test method can eliminate the artificial repeated adjustment of southerly angle of the table top of a rotary table, reduces the test difficulty, shortens the test period, improves the test efficiency by 3 times, and easily realizes the automatic program control measurement of the dynamic lock region.

Method for preciously measuring dynamic lock region of laser gyroscope

The invention relates to an LabVIEW-based quantum sensor magnetic field closed-loop control monitoring system. The system comprises a parameter setting module, a communication module, a data processing module, a display module and a lower computer magnetic field closed-loop control hardware circuit module, wherein the parameter setting module is used by a user for input of a parameter and a command and adjustment of the parameter; the communication module is used for performing serial communication between an upper computer and the magnetic field closed-loop control hardware circuit system, transmitting a control command or receiving data; and the data processing module is used for receiving data conversion and corresponding calculation of the data; the display module is used for displaying a calculation result and drawing; the magnetic field closed-loop control hardware circuit module is used for controlling a magnetic field of a nuclear magnetic resonance gyroscope according to the control parameter sent by an LabVIEW and feeding back the demodulated signal to the LabVIEW. According to the LabVIEW-based quantum sensor magnetic field closed-loop control monitoring system, the accurate control for a closed-loop of the nuclear magnetic resonance gyroscope is implemented, the number of instruments required for control is reduced, the key parameters of the magnetic field control are monitored, the development cycle is greatly reduced and the development cost is saved.

LabVIEW-based quantum sensor magnetic field closed-loop control monitoring system

The present invention relates to a mechanically dithered ring laser gyro dither device based on DSP and FPGA. A dithering mechanism generates a dither signal, and first passes the dither signal through a voltage follower, and then performs RC filtering; the filtering results are sent to a frequency follower circuit and a fixed amplitude circuit; the signal output by the frequency stabilization circuit directly enters an I / O port of a DSP; the output signal by the fixed amplitude circuit passes through an A / D converter and is transmitted to a DSP; the DSP conducts internally amplitude modulation and frequency follow, and outputs PWM wave to an FPGA; the FPGA conducts a phase shift processing, and outputs the results to a power amplifier circuit; and the results finally enter the dithering mechanism. The device has simple structure, small size and high control accuracy.

Mechanically dithered ring laser gyro dither device based on DSP and FPGA

The utility model belongs to circuits of mechanically dithered ring laser gyroscopes, in particular to a circuit capable of simultaneously sampling and simulating pseudorandom noise injection used for a mechanically dithered ring laser gyroscope. The circuit comprises a clock oscillator, a clock frequency divider, an M sequence generator, a synchronization signal rising edge detection circuit, a synchronization signal falling edge detection circuit, a rising edge spike pulse generating circuit, a falling edge spike pulse generating circuit, a full-period or half-period selection control circuit and a sampling hold circuit, wherein the full-period or half-period selection control circuit controls the on state of a nusoidal signal falling edge spike pulse generating circuit, and nusoidal signal rising edge synchronous sampling spike pulse signals and nusoidal signal falling edge synchronous sampling spike pulse signals are output after the XOR operation to obtain the synchronous sampling spike pulse signals, thereby realizing that the mechanically dithered signals can simulate the pseudorandom noise injection in a half-period simultaneous way, integrating the full-period synchronous noise injection, reducing the dynamic lock-in of the mechanically dithered ring laser gyroscope effectively, and improving the performance figures of the laser gyroscope.

Circuit capable of simultaneously sampling and simulating pseudorandom noise injection used for mechanically dithered ring laser gyroscope

The utility model belongs to a machine shaking laser gyro circuit, and particularly relates to a digital machine shaking control circuit The digital machine shaking control circuit comprises a machine shaking feedback signal detection circuit, a machine shaking amplitude value detection circuit, a machine shaking phase discriminator circuit, a control module, an isolating circuit and a machine shaking driving circuit, wherein the machine shaking feedback signal detection circuit is used for receiving an external signal; the machine shaking amplitude value detection circuit used for amplitude value detection and the machine shaking phase discriminator circuit used for phase discriminator are used for receiving a signal which is output by the machine shaking feedback signal detection circuit; the control module is used for receiving a signal which is output by the machine shaking amplitude value detection circuit and the machine shaking phase discriminator circuit and generating a machine shaking driving signal after combining signals output by the machine shaking amplitude value detection circuit and the machine shaking phase discriminator circuit; the isolating circuit is used for receiving a signal of the control module and isolating a noise wave; and the machine shaking driving circuit is used for receiving a driving signal generated by the isolating circuit and outputting the driving signal to an external device The digital machine shaking control circuit has the beneficial effects that: the circuit is simple and reliable, the control process is clear and the driving torque changes are smooth

Laser gyro digital machine shaking control circuit

The invention belongs to the nuclear magnetic resonance gyro control technology, and specifically discloses a laser diode current control system The laser diode current control system includes a DC control signal generation module and an AC control signal generation module, and also includes a current error detection and control module, a DC potential following control module and a laser diode module The laser diode current control system can effectively reduce the influence of a sampling resistor temperature coefficient on the current sampling precision, realizes the high stability control of the current, ensures the control accuracy of the DC current, improves the dynamic response bandwidth of the current, and enables the control accuracy of the DC current not to be affected in the AC current adjustment process through the DC potential following control technology

Yi Zheng

Papers

Circuit capable of simultaneously sampling and simulating pseudorandom noise injection used for mechanically dithered ring laser gyroscope

Laser gyro digital machine shaking control circuit

Laser diode current control system