RU2676225C1 - Control and inspection complex for inspection of doppler velocity and speed meters - Google Patents

Abstract

FIELD: measuring equipment.SUBSTANCE: invention relates to a measurement technique, namely, devices for monitoring and measuring electrical parameters of aviation radio equipment, namely, Doppler velocity and drift meters. Control and test complex for checking the DISS contains a personal computer with software connected to a network filter and an uninterruptible power supply. In addition, it contains a software-controlled power supply unit with a direct voltage and a software-controlled power supply unit with an alternating voltage, and two measuring units connected via a switching panel to the control object. First measuring unit includes measuring modules that implement measuring channels of DC voltage and measuring channels of AC voltage. Second measuring unit contains the control tasks module that implements the measuring channel for reproducing the voltage of the “unipolar square wave” form and the measuring channel for the frequency and duration of the pulses, a sine-cosine transformer module and an amplifier module that implements a measuring channel for reproducing synchronous AC voltages, and a discrete input module that implements a measuring channel for time intervals between events.EFFECT: technical result of the solution consists in the creation of a control and test complex for carrying out DISS checks in semi-automatic mode, which provides increased reliability and reliability of the results of a comprehensive check of the parameters of the equipment being tested in all modes of operation, the possibility of conducting semi-automatic checks.1 cl, 1 dwg

Description

The invention relates to measuring technique, to devices for monitoring and measuring the electrical parameters of aircraft radio equipment, namely Doppler speed and demolition meters DISS-15 (G), DISS-32, DISS-32-90 (A), DISS-32-28, DISS-013-S2M, designed for installation on helicopters Mi-8, Mi-8MTV, Mi-17, Mi-171 (2), Mi-24, Mi-26, Mi-28N, Mi-35M, Ka-27, Ka-28, Ka-29, Ka-31, Ka-50, Ka-52 and IL-76 aircraft (M, MD, T, TD, TD-90).

A known bench for checking the Doppler current velocity meter (RF patent No. 2561997, 05.21.2014, patent holder of the Association of Marine Instrument Making Enterprises CJSC), which includes an acoustically drowned pool and calibration equipment consisting of receiving and transmitting paths. The receiving path contains a receiving hydroacoustic antenna, with the possibility of orientation in the direction of radiation of the device under test, means for isolating and measuring the carrier frequency of the sonar pulses emitted by the Doppler speed meter. The transmitting path includes a generator configured to set the calculated value of the carrier frequency, changed relative to the carrier frequency of the radiation of the device under test by the magnitude of the Doppler frequency shift. But this solution can only be applied to a liquid medium and to verify a Doppler current velocity meter.

Currently, maintenance and verification of the parameters of Doppler speed and drift meters (hereinafter referred to as the DISS) intended for installation on helicopters and aircraft is carried out in accordance with the operating instructions for the DISS. To check the DISS-15, the PKD-15 remote control is used (“Technical description and operating instructions for GR2.702.039 TO”, 1987).

The ERP4-001 remote control is also known, which contains channels for measuring controlled parameters (see Appendix 1, “Manual for the technical operation of GM2.702.188-01 RE”, 1985) and used for testing DISS-32, DISS-32-90 (A ), DISS-32-28. This solution is selected as a prototype.

A disadvantage of the known solution is its high complexity, since it is necessary to use a large number of individual instruments for measurements, and the entire verification process is carried out manually, as well as low measurement accuracy due to the influence of the human factor and the use of morally and physically obsolete equipment.

The technical problem solved by the invention is to reduce operating and time costs, increase the accuracy and reliability of measurements, as well as increase the convenience of the verification process and the ability to maintain an electronic database of checks.

The technical problem posed is solved by the fact that the well-known test complex for testing Doppler speed and drift meters, containing channels for measuring controlled parameters, additionally contains a personal computer with software connected to a line filter and uninterruptible power supply, with a program-controlled power supply unit with a constant voltage and with a software-controlled AC power supply, and with two measuring units, the first of which is includes measuring modules realizing measuring channels of direct current voltage and measuring channels of alternating current voltage, and the second measuring unit contains a control task module that implements a measuring channel for reproducing voltage of the form “unipolar meander” with arbitrary setting of amplitude, frequency and phase shift between the channels and measuring channel of frequency and duration of pulses, a module of sine-cosine transformers and an amplifier module that implements a measuring playback channel Synchro AC voltages and digital input module that implements the measuring channel time intervals between events, wherein the measuring units are connected via a patch panel with the object of control.

The technical result from the use of the claimed solution is to ensure high reliability and reliability of the results of a comprehensive check of DISS in all modes of their functioning, as well as the possibility of automated checks. The control and verification complex with the help of switching boards and program-controlled signal generators of a special form in accordance with the technical conditions for the test object forms a set of signals. The claimed solution provides the ability to maintain an electronic database of inspections, expanding the list of equipment under test by adding measuring modules and switching units without changing the existing circuit, creating, on the basis of a set of compact automated workstations for monitoring, troubleshooting and repair of DISS. Diagnostics and verification of DISS is carried out in a semi-automatic mode using software, which ensures high accuracy of quality control of DISS and troubleshooting, and also allows to reduce the influence of the human factor on the accuracy of measurements and reduce the time required to verify the operability of equipment.

The claimed combination of features is unknown to the applicant from available sources of information.

The claimed solution is illustrated by the drawing, which shows a block diagram of the device, with the positions indicated: 1 - line filter and uninterruptible power supply, 2 - software-controlled power supply with constant voltage, 3 - software-controlled power supply with alternating voltage, 4 - personal computer with software, 5 - measuring unit, containing measuring modules 6 and 7, 8 - measuring unit, containing modules for generating special signals 9, 10 11 and 12, 13 - switching panel, 14 - checked equipment of (DISS).

The control and verification complex (hereinafter referred to as the complex) for checking the DISS contains a personal computer 4 connected to measuring units 5, 8 and to power supply units 2, 3. Computer 4 is designed to control all units of the complex, display the progress of the test, and also to collect , processing, storing information about the equipment being tested.

Power supplies 2 and 3 are two separate programmable power supplies: AC 115 V and DC 27 V and provide power to the equipment under test 14. Power supply 2 implements a measurement channel (IR) for reproducing 27 V DC voltage. Power supply 3 implements IR playback of AC voltage 115 V 400 Hz.

The equipment under test 14 is connected to the panel of the switching complex 13 by means of the respective harnesses.

Mains power ~ 220 V 50 Hz is supplied to the power supply units, computer 4 and measuring units 5 and 8 through the line filter and uninterruptible power supply 1.

The measuring unit 5 includes measuring modules (6, 7) that implement the following measuring channels (IR):

- IR DC voltage;

- IR AC voltage.

The measuring unit 8 includes measuring modules and modules for generating special signals, namely: a control task module 9, a sine-cosine transformer (SKT) module 10, an amplifier module 11, and a discrete input module 12, which implement the following measuring channels (IR) :

- IR voltage reproduction of the “unipolar meander” form with arbitrary setting of the amplitude, frequency and phase shift between the channels (control task module 9);

- IR reproduction of synchronous AC voltages; (SKT 10 module, amplifier module 11);

- IR time intervals between events; (discrete input module 12);

- IR frequency and pulse duration (control task module 9).

The principle of operation of IR reproduction of a DC voltage of a 27 V network is based on the formation of a DC voltage by a switching power supply. DC voltage is output to external devices in a form convenient for the user. The principle of operation of IR reproduction of AC voltage of a network of 115 V 400 Hz is based on the formation of AC voltage using a DAC with its subsequent amplification by a D-class amplifier. The output voltage is galvanically isolated using a transformer. Adjustment is carried out by measuring the output voltage on the transformer and maintaining its level by commands from the PC via the USB interface.

The principle of operation of IR reproduction of voltage of the “unipolar meander” form with arbitrary setting of amplitude, frequency and phase shift between channels is based on digital synthesis of meander signals with an adjustable phase and frequency. The amplitude is adjusted using a multiplier. IR provides galvanic isolation of the digital synthesizer and output circuits using a DC / DC converter and optocouplers. The principle of operation of the IR reproduction of synchronous AC voltages is based on the reproduction of AC voltage using a DAC with subsequent amplification of the output signal by power. The phase shift of the AC voltage is adjusted programmatically by temporarily shifting between IR. The principle of operation of an IR voltage of direct (alternating) current is based on the formation of a voltage drop of direct (alternating) current on a voltage divider collected on resistors with a total resistance of more than 2 megohms, with its subsequent conversion to a digital code in real time using the ADC, followed by transmission via the interface USB to the system computer, its processing and delivery of measurement results to external devices in a form convenient for the user.

The principle of operation of IR time intervals between events is based on the use of the built-in PC clock for measuring time intervals. The principle of the IR frequency and pulse duration is based on counting the reference frequency pulses for the period of the measured signal and calculating the signal frequency and pulse duration.

The complex is designed to control and measure the electrical parameters of Doppler speed and demolition meters DISS-15 (G), DISS-32, DISS-32-90 (A), DISS-32-28, DISS-013-S2M, designed for installation on helicopters Mi-8, Mi-8MTV, Mi-17, Mi-171 (2), Mi-24, Mi-26, Mi-28N, Mi-35M, Ka-27, Ka-28, Ka-29, Ka-31 , Ka-50, Ka-52 and IL-76 aircraft (M, MD, T, TD, TD-90). In terms of design, the complex is made on a modular basis. The operator’s workplace is formed from separate parts of the complex.

The control and verification complex has several operating modes, including:

1) semi-automatic verification mode;

2) the mode of integrated monitoring of the health of the complex (self-diagnosis);

3) mode of metrological verification of measurement channels.

Description of the complex.

Before starting the DISS check, its blocks must be placed on the table and on the trolley for the RF block and connected using the appropriate harnesses to the system cabinet.

When connecting blocks of the tested DISS, control is carried out using a personal computer. The supply voltage is connected and the DISS is controlled by means of switching boards for measuring channels and supply voltages that are part of the measuring units.

After connecting the DISS to the system cabinet, the power supply is switched on programmatically, then the supply voltages are connected in the desired sequence, and the currently required DISS operating mode is turned on.

The measured parameters are compared with the reference values. If the deviations of the measured parameters from the reference are within the established tolerances, the object of verification is considered suitable. If the measured parameters deviate from the tolerances, the test object is recognized as defective. All signals measured as a result of the verification are entered into the computer database and on their basis a verification map of the corresponding object being checked is compiled.

The software of the KPK-2 complex is intended for:

- selection of the operating modes of the complex;

- Providing a convenient user interface for managing inspections and displaying control results;

- maintaining a database of inspections;

- generating reports on the results of inspections and printing them.

Verification Example.

Checking the accuracy of working out and indicating the components of the velocity vector according to the control task KZ-2 of the complex and changing the longitudinal (Wxg), transverse (Wzg) and vertical (Wyg) components of the velocity vector with the introduction of roll and pitch angles from the complex.

1. Connect the DISS-15 to the product with the appropriate harnesses.

2. After entering information on the tested DISS-15, go to the verification tab and, by clicking on the corresponding button, turn on the power, while DC27 + voltage and voltage will be applied to the DISS-15 from the software-controlled power supply units 2 through the switching panel 5 AC ~ 115 V 400 Hz.

3. Go to the tab “Control tasks” and press the button “KZ-2 (BACK-RIGHT)”, at the same time from the voltage reproducing module of the “unipolar meander” shape with arbitrary setting of the amplitude, frequency and phase shift between the channels of the measuring unit 4 through the switching panel 5 on the DISS-15 will be fed a set of signals corresponding to this control task. At DISS-15, the KZ-2 task will be fulfilled.

4. After working out the control task, it is necessary to enter the values of the velocity components Wxg, Wzg and Wyg measured by the DISIS-15 low-speed indicator in the “Back”, “Right”, “Up” fields on the “Data from block 6” panel of the product. The module for measuring the DC voltage of the measuring unit 4 will measure the voltages at the corresponding contacts of the DISS-15 and after mathematical processing will display the speed values proportional to the measured voltages.

5. To enter the roll angle from the product, select the “+ 15 °” (“-15 °”) angle on the “Enter roll and pitch angles” panel and press the “Roll” (“Pitch”) button, while using the synchronous playback module the alternating current voltages of the measuring unit 4 through the patch panel 5, the DISS-15 will receive a set of signals simulating a given roll angle (pitch). On the low-speed indicator, DISS-15 will fulfill the corresponding task. The changed values of the transverse Wzg and vertical Wyg components of the velocity vector are recorded by the operator in the "Right", "Up" fields.

6. After checking at the required angles and directions of angular movement, click on the “Reset” button on the “Entering roll and pitch angles” panel, while a set of signals simulating an angle of 0 ° across all of the signals will be sent to the DISS-15 from the module for reproducing synchronous AC voltages directions of angular movement.

7. After setting the values on the indicators of the complex, press the “KZ-2 (BACK-RIGHT)” button, and the signals to the DISS-15 from the unipolar meander voltage reproducing module with the arbitrary setting of amplitude, frequency and phase shift will stop between the channels. All necessary values measured during this check will be stored in the database.

The control and verification complex is an automated system for monitoring and measuring the DISS parameters of Mi-8, Mi-17, Mi-171 helicopters and others. It monitors and measures all the necessary parameters of the equipment under test in accordance with the regulatory inspection guides and technical operation manuals for checked DISS, preparation and formation of a standard report form for the results of tests and repairs.

The complex provides the functions of calibration of devices in accordance with the current regulatory documentation, collection, processing, accumulation and storage of test results, output of test results, maintaining a database for each tested device. All measured values using the software for each type of device are displayed on the monitor screen, and are also stored in the database for this type of device and can be used to verify its operability during operation.

Claims (1)

Testing complex for testing Doppler speed and drift meters, containing channels for measuring controlled parameters, characterized in that it contains a personal computer with software connected to a line filter and an uninterruptible power supply, with a software-controlled constant voltage power supply and with software -controlled power supply unit with alternating voltage, and with two measuring units, the first measuring unit includes measuring modules that realize measuring channels of direct current voltage and measuring channels of alternating current voltage, the second measuring unit contains a control task module that implements a measuring channel for reproducing voltage of the “unipolar meander” form with arbitrary setting of amplitude, frequency and phase shift between channels and a measuring channel for frequency and pulse duration, module sine-cosine transformers and an amplifier module that implements a measuring channel for reproducing synchronous AC voltages, and mod eh discrete input that implements the measuring channel time intervals between events, wherein the measuring units are connected via a patch panel with the object of control.

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