RU2643684C1 - Device for measurement of navigation instruments immunity level - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: device for noise immunity level measurement for navigation instruments contains a deflecting unit with the shaft kinematically connected with a rotating transformer and being the kinematic input of the device, an alternating voltage source, a signal analyzer connected to the sine and cosine windings of the rotating transformer, which are the device output, a transformer, through the primary winding of which the AC voltage source is connected to the excitation winding of the rotating transformer, serially connected interference signal generator and buffer with an output connected to the secondary winding of the transformer, a radio interference source, a shielding device, a radio interference receiver, an interference analyzer.

EFFECT: expanded functionality due to introduction of the mode of radio interference effect provision, their control and measurement.

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Description

The invention relates to the field of measurement and can be used in metrological studies of navigation instruments using signals from a rotating transformer.

A device for measuring the static error of a rotating transformer [1], containing a corner-setting assembly, the shaft of which is kinematically connected with a rotating transformer and is the kinematic input of the device, analog-to-digital converter, digital-to-analog converter, monitor, AC voltage source connected functionally.

The disadvantage of this device is the lack of a mode to ensure the measurement of the level of resistance to radio interference.

A device is known for measuring the noise immunity of navigation instruments using signals from a rotating transformer [2], comprising a corner-setting assembly, a rotating transformer with sine and cosine windings and an excitation winding, an AC voltage source, a signal analyzer, a transformer with primary and secondary windings, an interference signal conditioner , buffer connected functionally.

The disadvantage of this device is the lack of a mode to ensure the measurement of the level of resistance to radio interference.

Achievable technical result of the present invention is the expansion of functionality by introducing a mode of providing exposure to radio interference, their monitoring and measurement.

This object is achieved in that in a device for measuring the noise immunity of navigation instruments using signals from a rotating transformer, containing an angle-setting unit, the shaft of which is kinematically connected to the input of the device, an AC voltage source, a signal analyzer connected to the sine and cosine windings of the rotating transformer, which is the output of the device, a transformer, through the primary winding of which the AC voltage source is connected to the field winding by rotating According to the invention, a shielding device, a radio interference analyzer, a radio noise receiver, the output of which is connected to the input of an interference analyzer, a radio noise source that acts on the shielding device are additionally introduced according to the invention rotating transformer and radio interference receiver.

Significant differences of the proposed device include the introduction of a shielding device, a radio noise analyzer, a radio noise receiver, the output of which is connected to the input of an interference analyzer, a radio noise source that acts on a rotating transformer and a radio noise receiver placed in the shielding device. This inclusion allows you to impose a signal of radio interference through the shielding device on a rotating transformer, and therefore on the useful signal of its sine and cosine windings, which are the output of the device.

In FIG. 1 shows a diagram of a device.

The proposed device contains a corner-setting unit (1), a rotating transformer 2 with a sine and cosine windings 10, 11 and an excitation winding 12, an AC voltage source 3, a signal analyzer 4, a transformer 5 with a primary and secondary windings 8, 9, an interference signal shaper 6, buffer 7, outputs 13, 14, shielding device 15, radio interference analyzer 16, radio interference receiver 17, radio interference source 18.

In the device, the angle-setting unit 1 is kinematically connected with the rotating transformer 2, the AC voltage source 3 is connected through the primary winding 8 of the transformer 5 to the excitation winding 12 of the rotating transformer 2, the sine and cosine windings 10, 11 of which are the outputs 13, 14 of the device and are connected to the analyzer 4 signal, the shaper 6 of the interference signal is connected through a buffer 7 to the secondary winding 9 of the transformer 5, the radio noise receiver 17 is connected to the radio noise analyzer 16, the radio noise source 18 affects the e in the shielding device 15, a rotating transformer 5 and a radio interference receiver 17.

A device for measuring the noise immunity of navigation devices works as follows.

The navigation device uses signals that change according to the law of sine and cosine when the angular position of the rotating transformer changes.

In the proposed product, using an angle-setting unit 1, kinematically connected with a rotating transformer 2, you can set any angle, while the outputs of the sine and cosine windings 10, 11 will change the signal amplitude according to the law of sine and cosine. These signals from the outputs 13, 14 are fed to the input of the investigated navigation device. A sinusoidal signal is supplied to the excitation winding 12 from an AC voltage source 3 through the primary winding 8 of the transformer 5 to provide power to the rotating transformer 2. An interference signal is applied to the primary winding 9 of the transformer 5 from the shaper 6 through the buffer 7, which is superimposed on the sinusoidal supply voltage of the excitation winding 12 through the primary winding 8 of the transformer 5.

The radio interference signal superimposed on the rotating transformer 2 is transmitted to the signals of the sine and cosine windings 10 and 11, causing an error in the operation of the navigation device.

The ratio of the useful signal to interference is measured by the analyzer 4 signal.

The noise immunity level of the navigation device is measured as follows. The angle at which the noise immunity is to be estimated on the scale of the angle-detecting unit 1, include the interference signal generator 6 and the radio noise source 18, monitoring the interference level by the radio interference analyzer 16, compare the indicator value of the navigation device with the angle value set on the angle-correction node scale 1. By increasing the output signal of the jammer 6 of the interference signal and / or the source of radio interference 18, an error is obtained between the indication of the indicator of the navigation device and the set value of the angle on the scale of the angle-setting unit 1, and the ratio of the useful signal and interference is measured using the signal analyzer 4.

The proposed device is used to measure the noise immunity of an integrated system of backup devices.

Information sources

1. RF patent No. 2362178, IPC Н03М 1/10, 2008

2. RF patent No. 2572500, IPC Н03М 1/10, 2014 (prototype).

Claims (1)

A device for measuring the noise immunity level of navigation instruments, which contains an angle-locking assembly, the shaft of which is kinematically connected to a rotating transformer and is the kinematic input of the device, an AC voltage source, a signal analyzer connected to the sine and cosine windings of the rotating transformer, which are the output of the device, a transformer, through the primary winding whose AC voltage source is connected to the field winding of a rotating transformer, connected after Conversely, the jammer of the interference signal and the buffer, the output of which is connected to the secondary winding of the transformer, characterized in that it additionally includes a shielding device, a radio noise analyzer, a radio noise receiver, the output of which is connected to the input of the interference analyzer, and a radio noise source that acts on the shielding device rotating transformer and radio interference receiver.

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