RU123167U1 - TACHOMETER CHECK UNIT - Google Patents

Abstract

1. A tachometer testing unit containing a power source and a speed setting device, characterized in that it further comprises a control module including a controller and a switch, and input and output devices, and the speed setting device is made in the form of a servo drive connected to the control module and consisting of from a servomotor and a servo amplifier, while the servomotor is mechanically connected to the tested tachometer and generates the specified rpm of the tested tachometer, and the tested tachometer is connected through the electrical connector to the commutator of the control module. 2. The tachometer testing unit according to claim 1, characterized in that it additionally contains electrical connectors for connecting to a computer.

Description

The utility model relates to measuring equipment, namely to devices for monitoring and measuring the parameters of tachometers, in particular magnetic induction ITE-1T and ITE-2T,

Currently, tachometers are monitored and measured using the KTU-1M control test installation in accordance with the “Technical Description and Installation and Operation Instructions” (see Appendix 1). The installation contains a remote control measuring PI-1M, a sensor of type D-14 and a friction clutch of type F-1, as a speed setting device. The power supply of the installation and the equipment under test is carried out from the workshop power sources. This solution is selected as a prototype.

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

The objective of the claimed solution 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 inspections.

This goal is achieved due to the fact that the known tachometer check unit containing a power source and a speed generating device further comprises a control module including a controller and a switch and input and output devices, and the speed generating device is made in the form of a servo connected to the control module and consisting of a servomotor and a servo amplifier, while the servomotor is mechanically connected to the tested tachometer and generates the given revolutions of the tested tachometer, which The cut electrical connector is connected to the switch of the control module. In addition, the tachometer check unit is equipped with electrical connectors for connecting to a computer.

The technical result from the use of the claimed solution is to reduce operating and time costs, increase the accuracy and reliability of the results of checking tachometers, as well as the possibility of conducting fully automated checks when connecting the unit to a PC. The claimed solution is a unit that performs diagnostics and verification of tachometers both in manual and automatic mode, using software, which allows to reduce the influence of the human factor on the accuracy of measurements and reduce the time required to verify the operability of the equipment.

The servo drive of the tachometer check unit generates speed with high stability and, the unit, through the control module, measures the interfacial voltage of the tachometers. The power source generates the necessary voltage for the operation of the unit nodes and powering the equipment under test. When checking, the control module generates control signals for the servo drive to smoothly set the required speed. After setting the required value, the servo drive enters the mode of maintaining revolutions at the required level (mechanical loads on the equipment under test are reduced). Thus, both the necessary speed for setting the revolutions and the high stability of the set value are ensured. Revolution stability is maintained automatically during operation. The stability of revolutions is also supported by possible fluctuations in the load (due to mechanical wear of the sensors).

If the permissible load is exceeded (in case of malfunction of the equipment under test), the servo is switched off, which ensures safe operation.

The advantage of the claimed solution is the convenience and accuracy of setting and removing parameters during testing, low noise during operation, ease of mounting of the equipment under test, low weight of the unit. The block allows checking, both under computer control, and autonomously.

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

The claimed solution is illustrated by drawings, where figure 1 shows a block diagram of a device.

The tachometer check unit contains:

1 - control module

2 - controller

3 - switch

4 - servo

5 - servo amplifier

6 - servomotor

7 - output device

8 - input device

9 - power source

10 - mechanical articulation with the equipment under test

11 - electrical connector for connecting the equipment under test

12-14 - interfaces for connecting to a PC

The tachometer check unit contains a control module 1, including a controller 2 and a switch 3, a servo drive 4 connected to a control module 1 and consisting of a servomotor 5 and a servo amplifier 6, an information output device 7 and an input device 8, a power supply 9. A servomotor 5 through a mechanical joint 10 is connected to the tachometer under test and generates the given revolutions of the tachometer under test, and the tachometer under test is connected through the electrical connector 11 to the switch 3 of the control module 1. The unit is equipped with Nia 1 interfaces 12, 13 and 14 for connection to a PC.

The power source 9 generates the necessary voltage for the operation of the unit nodes and powering the equipment under test.

Through the electrical connector 11, the signals from the sensor of the tested tachometer arrive at the switch 3 of the control module 1. The signals passing through the switch 3 are sent to the controller 2, which measures the parameters taken from the tested tachometer, processes and displays on the output device 7. Through the electrical connectors 12, 13 and 14, the processed information may be transmitted to a computer.

The tachometer check unit has several modes of operation, including:

1) automatic verification mode;

2) manual verification mode;

3) the mode of integrated control of the health of the complex.

Diagnostic tests are preliminarily generated, which can be generated, for example, based on the manufacturer's specifications.

Before starting the test, the control object (the checked tachometer) is connected to the test block, the power is turned on, and the block carries out a self-diagnosis procedure. The indicators control the health of the unit and the correct connection of the control object. Then select the type of tachometer under test and the type of test.

To check the basic error of the tachometer, the equipment under test is connected in accordance with the verification scheme. The block sets the revolutions corresponding to the value of the tested point;

The output device displays

- the checked value of revolutions at the checkpoint;

- the actual value of the revolutions given by the unit;

- measurement error;

- value of the measured voltage in the selected phase

The rpm values are sequentially set and the voltage of the tachometer sensor is measured. In this case, visually check the position of the gauge needle and, if necessary, adjust the position of the pointer arrow by increasing or decreasing the speed, based on the theoretically required value and practically set by the control module 1. Using the control buttons, set the arrow on the tachometer pointer exactly at the point being checked and record the value inaccuracies. The error value is determined for each tested point of the device in the forward and reverse stages.

To verify the smooth running of the tachometer needle, the equipment under test is connected in accordance with the verification scheme.

The unit gradually increases and decreases the speed value, setting the speed value within the first test range of 250-375 rpm (10-15% on the tachometer pointer). Visually evaluate the jitter of the tachometer needle. The arrow should move smoothly, without jerks noticeable to the eye. Then move on to the next tested range. Measure on all three test ranges. The error should not exceed 1.5%, from the upper limit of measurement, in the range of (10-15)%, 1% in the range of (15-25)% and 0.1% in the range of (25-110)%.

To check the tachometer input in synchronism, the equipment under test is connected in accordance with the verification scheme.

The unit sets the speed value within the checked range (50-2750) rpm (1-110% on the tachometer pointer). Visually assess the entry of the tachometer into synchronism, noting the point from which the pointer arrow begins to move smoothly, without jerking. The indicator motor must be in synchronism up to and including 10%.

The parameters of the output signals 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 drawn up.

The hardware of the unit can function both in manual mode and in automatic mode under the control of system and application software installed on a PC. The complex software is intended for:

- selection of unit operating modes;

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

- simulation of the operating modes of the device under test;

- control of the correct connection of the device under test;

- automatic block testing;

- automated verification of the parameters of the device under test;

- maintaining a database of inspections;

- generating reports on the results of inspections and printing them

The tachometer check block is an automated system for monitoring and measuring tachometer parameters, and monitors and measures all the necessary parameters in accordance with the manuals for technical operation and technical conditions, collects, processes, accumulates and stores the results of checks, displays the results of checks, maintains a database for each the device under test. All measured values using the software for each type of device are displayed on the information output device, and are also stored in the database for this type of device and can be used to verify its operability during operation of the device.

Claims (2)

1. The tachometer check unit containing a power source and a speed setting device, characterized in that it further comprises a control module including a controller and a switch, and input and output devices, and the speed setting device is made in the form of a servo connected to the control module and consisting of from a servomotor and a servo amplifier, while the servomotor is mechanically connected to the tested tachometer and generates the given revolutions of the tested tachometer, and the tested tachometer through the electrical connector with one with the switch management module. 2. The tachometer check unit according to claim 1, characterized in that it further comprises electrical connectors for connecting to a computer.