RU2738910C1 - Control and verification system for aneroid-membrane devices - Google Patents

Abstract

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment, namely to devices for monitoring and measuring parameters of aneroid-membrane devices of helicopters. Control and verification system for aneroid-membrane devices includes a computer, a measuring unit, a power supply unit and a pressure calibrator with a pneumatic pump connected to it. Besides, it is equipped with unit of air signals system checking and interface module for data exchange with air signals system. Air signal system check unit comprises resistance reproduction module and voltage reproduction module, which are connected by outputs with inspection object, and module of AC current measurement, which is connected to inputs with verification object.

EFFECT: technical result is broader functional capabilities of the system.

1 cl, 1 dwg

Description

The claimed solution relates to measuring equipment, namely to devices for monitoring and measuring the parameters of aneroid-membrane instruments of helicopters Mi-8, Mi-17, Mi-171, etc.

In the patent of the Russian Federation No. 47096, 2005, the patent holder of the Open Joint Stock Company "Ramenskoye Instrument-Making Design Bureau" "Test equipment for inertial navigation systems", a device is described containing a computer connected at the inputs and outputs with an interface unit, which is through a local exchange highway data connected to the block of power supplies. Using the standard RS-232 interface allows using any PC regardless of its internal bus without an additional interface calibrator board. For storing programs and long-term information, a flash memory chip of 2 MB or more with support for file structure is installed, and there is also the possibility of expanding memory up to 144 MB. The disadvantage of this solution is the impossibility of using it to measure the parameters of navigation devices of the aneroid-membrane type, since it does not provide the ability to measure and set pressure.

The closest in technical essence and the achieved result of the existing analogues is the solution "Control and verification complex for aneroid-membrane devices", RF patent No. 94696, 2010, including a computer connected to the inputs and outputs with an interface unit, a local data exchange highway, a power supply unit, a pressure calibrator with a pneumatic pump connected to it and a measuring unit consisting of a discrete input module, a switching module, a data decryption module from an on-board recording device, AC voltage measurement modules, adjustable current source modules and DC voltage measurement modules. The complex carries out diagnostics and testing of aneroid-membrane devices of helicopters in automatic mode, using software, which allows to reduce the influence of the human factor on the measurement accuracy and reduce the time spent on checking the equipment operability. However, this complex does not provide the ability to check the aneroid-membrane equipment of the Mi-8/17, Mi 24, Mi 26, Mi-28N, Mi-35M helicopters, etc. due to the impossibility of checking the helicopter air signal system (SVS).

The technical problem, the elimination of which the claimed solution is aimed at, is the expansion of the functionality of the control and verification complex for testing aneroid-membrane equipment.

The problem is solved due to the fact that the well-known control and verification complex for aneroid-membrane devices containing a computer connected through a local data exchange line to a power supply unit, a pressure calibrator with a pneumatic pump connected to it and a measuring unit consisting of a discrete input module , a switching module, a data decoding module, modules for measuring AC and DC voltages and modules of adjustable current sources, additionally contains a unit for checking the air signal system and an interface module for exchanging data with the air signal system, which are connected to a computer via a local data exchange line, while the air signal system testing unit is made up of a resistance reproduction module and a voltage reproduction module connected at the outputs to the test object and an alternating current measurement module connected at the inputs to the test object.

The technical result from the use of the claimed solution is achieved due to the fact that the claimed set of features makes it possible to create certain combinations of static and dynamic pressures in the static and dynamic SHS systems, while the input parameters are set by the air signal system check unit and through the interface module for data exchange with the system air signals and the computer go to the SHS. Each set of test signals corresponds to a set of reference signals at the outputs of the tested objects.

The resistance reproduction module forms a DC resistance using a set of resistors and a trimming potentiometer, which is connected to the output contacts of the module by turning on the corresponding electromagnetic relay controlled by the system computer via the RS-485 interface. The voltage reproducing module generates an alternating current voltage with an amplitude of 0 to 10 V and a frequency of 400 Hz using a multiplying digital-to-analog converter (DAC). The multiplication factor is set on the computer of the system with subsequent transfer to the DAC via the RS-485 interface. The AC current measuring module with forms the AC voltage drop using a current transformer on the Hall effect with the voltage transfer to the measuring unit, followed by its conversion into a digital code in real time using a second order sigma-delta analog-to-digital converter with subsequent transmission over interface RS-485 to the computer of the system, its processing and output of results.

The claimed solution is a complex that carries out diagnostics and testing of all aneroid-membrane instruments of helicopters in automatic mode, using software, which reduces the influence of the human factor on the measurement accuracy and reduces the time spent on checking the equipment operability.

The claimed set of features is not known to the applicant from available sources of information.

The stated solution is illustrated by drawings, where:

FIG. 1 shows a block diagram of the device.

The control and testing complex for aneroid-membrane devices (hereinafter referred to as the complex), includes an industrial computer 1, which is connected via a local data exchange line to an interface module for exchanging data with an air signal system (interface module) 2, to an air signal system test unit 3 , to the measuring unit 7, to the unit of programmed power supplies (supply voltage unit) 8, to the pressure calibrator 9 with a pneumatic pump connected to it 10. The air signal system test unit 3, consists of a resistance reproduction module 4, a voltage reproduction module 5 and a module measuring alternating current 6. The measuring unit 7 contains a discrete input module, a switching module, a module for decrypting data from an on-board recording device, modules for measuring alternating voltages, modules for adjustable current sources and modules for measuring constant voltages (not shown in the diagram). The test object 11 is connected to the measuring unit 7, the supply voltage unit 8, the pressure calibrator 9, the interface module for exchanging data with the air signal system 2, the air signal system test unit 3. Computer 1 is designed to control all the units of the complex, display the test progress, and also for collecting, processing, storing information about the tested equipment. Supply voltage block 8 consists of three separate programmable power supplies: AC 36 V 400 Hz, 115 V 400 Hz and DC 27 V and is designed to generate supply currents and voltages. The interface module for data exchange with the air signal system 2 and the air signal system test unit 3 are designed to test the operability of the SVS-V1-1 air signal system (test object 11) and the units included in it. The resistance reproducing module 4 and the voltage reproducing module 5 are connected at the outputs to the test object 11. The AC current measurement module 6 is connected at the inputs to the test object 11.

The complex is designed to control and measure the parameters of the following aneroid-membrane devices of the Mi-8/17, Mi-24, Mi-26, Mi-28N, Mi-35M, Ka-27, Ka-28, Ka-29, Ka-31R helicopters , Ka-52, Ka-226: speed indicators US-450K, US-350K, USV-450PZ, etc .; variometers VAR-30M, VR-30PZ, VRF-6K, etc .; altimeters VD-10 VK, VEM-72, UVID-30-15, UVID-30-15K, VM-15PZ, VMTs-10-PZ, etc .; DVK altitude correction sensors; pressure measuring complexes IKD-27, IKD27Df-0.4, IKD27Da-7, etc.; measuring complexes for pressure switches IKDRDf-0.016-0.005-3, IKDRDf-0.016-0.005-O, IKDRDf-0.1-0.08-3; height correctors KV-11; correctors-setters of instrumental speed KZSP with block BSG; correctors-setters of height KZV-0-15 with block BSG; BSG readiness signal blocks; height sensors DV-15MV; DAS instrument speed sensors; DPSM-1 instrument speed sensors; ICE-24 airspeed sensors; pressure alarms SD-29A, SDU2A-0D8; pressure regulators RDII-0,16-0,125-0; blocks BSPI-4-2 and PU-25 from the BUR-1-2 set through the channels of the DPSM-1, DAS, DV-15MV sensors; high-speed pressure signaling devices SSN-0.075; speed signaling devices SSA-0.7-2.2; air signal systems SVS-V1-1.

The control and verification complex has several modes of operation, including:

1) automatic check mode;

2) manual check mode;

3) the mode of the built-in monitoring of the complex performance.

The work of the complex is based on:

- DC voltage measurement;

- measuring alternating voltage;

- measuring direct current;

- measuring alternating current;

- measuring resistance;

- installation and measurement of static and dynamic pressure;

- measurement of pressure leaks of static and dynamic systems; -forming single-phase / three-phase voltages 0 ... 150 V,

frequency of 400 Hz;

- forming a constant voltage of 27 V.

- measuring the reliability of the contact system;

Before starting the test of the tested aneroid-membrane device 11, it must be installed on a vibro-rotary installation (not shown) and connected using wiring harnesses, as well as static and dynamic pressure hoses to the control and testing complex.

The control and verification complex with the help of a pressure calibrator 9 and a pneumatic pump 10 in accordance with the technical specifications for the object of inspection And forms a set of signals of static or dynamic pressure, or static and dynamic pressure. Each set of test signals corresponds to a set of reference signals at the outputs of the objects to be tested (in the technique of automated control, they are called response signals to test signals). Data on the reference values of the parameters of the aggregates of static and dynamic pressure signals and the parameters corresponding to the reference response signals are taken from the technical specifications of the corresponding objects of verification. The parameters of the response signals obtained using the measuring unit 7 are compared with the reference values. If the deviations of the measured parameters from the reference ones are within the established tolerances, the test object is considered suitable. If the measured parameters deviate outside the tolerance limits, the test object is recognized as faulty and the fault is diagnosed. All signals measured as a result of the check are entered into the database of computer 1, and on their basis a check card of the corresponding checked object is drawn up.

As an example of the operation of the complex, a description of the verification of the SVS-V1-1 air signal system (hereinafter - SVS) is given.

1. To check the tightness of the static system, the pneumatic pump 10 creates an absolute pressure of 355 mm Hg in the static and dynamic systems of the SHS. Using the pressure calibrator 9, the tightness of the static system is measured for 1 min, which must meet the technical conditions.

2. To check the output parameters in the operating mode through the channels of the indicated speed and barometric altitude, the pneumatic pump 10 creates certain combinations of static and dynamic pressures in the static and dynamic systems of the SHS. The input parameters are set by the air signal system check unit 3 and through the interface module for data exchange with the air signal system (hereinafter referred to as the interface module) 2 and the computer 1 enter the CBC. Upon reaching the preset pressure levels, information in the form of octal codes is read, which comes from the CBC through the interface module 2 to the computer monitor 1. The values of the codes must correspond to the values specified in the technical specifications.

3. To check the operability in the "Test-control" mode, the input parameters supplied to the CBC are set through the interface module 2. Then the information in the form of octal codes is read, which comes from the CBC through the interface module 2 to the computer monitor 1. The values of the codes must correspond values specified in the technical specifications.

4. To check the operability in the operating mode, the pneumatic pump 10 creates certain combinations of static and dynamic pressures in the static and dynamic SHS systems. The input parameters are set by the pressure calibrator, the air signal system testing unit 3 and are fed to the CBC through the interface module 2 and the computer. Upon reaching the preset pressure levels, information in the form of octal codes is read, which comes from the CBC through the interface module 2 to the computer monitor 1. The values of the codes must correspond to the values specified in the technical specifications.

The control and verification complex is an automated system for monitoring and measuring the parameters of aneroid-membrane instruments of helicopters Mi-8, Mi-17, Mi-171, etc. and monitors and measures all the necessary parameters of the tested equipment in accordance with the manuals for overhaul, manuals for technical operation and technical conditions for the tested aneroid-membrane devices, preparation and formation of a standard report form based on the results of tests and repairs.

The complex ensures the performance of the functions of checking devices in accordance with the current regulatory documentation, collecting, processing, accumulating and storing test results, displaying 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 check its operability during the operation of the device.

Claims (1)

A control and testing complex for aneroid-membrane devices containing a computer connected through a local data exchange line to a power supply unit, a pressure calibrator with a pneumatic pump connected to it, and a measuring unit consisting of a discrete input module, a switching module, a data decoding module, modules measuring AC and DC voltages and modules of adjustable current sources, characterized in that it additionally contains a unit for checking the air signal system and an interface module for exchanging data with the air signal system, which are connected to a computer via a local data exchange line, while the unit for checking the air system signals is made consisting of a resistance reproducing module, and a voltage reproducing module connected at the outputs to the test object, and an alternating current measuring module connected at the inputs to the test object.

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