RU2789297C1 - Torsiograph - Google Patents

Abstract

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment and may be used to diagnose condition of shafts and shaft lines in shipbuilding. Torsiograph contains a casing, a base in the form of a printed circuit board fixed on the bottom surface of the casing, on which a three-axis microelectromechanical accelerometer with built-in analog-to-digital converter, a microprocessor connected to the ADC, a memory chip connected to the microprocessor, an information output device made in the form of a LED graphic screen installed on metal legs and connected to the microprocessor, and a battery connected to a voltage regulator fixed to the side of the casing. The voltage regulator is connected to the microprocessor, accelerometer, memory chip, information output device and touch buttons on the metal legs to control the microprocessor, the casing has a transparent plastic cover with a toggle switch and a connector for information transfer and charging the battery and is rigidly fixed to the the shaft with mounting straps fitted with a ratchet lock.

EFFECT: invention increases the torsional vibration measurement accuracy.

1 cl, 2 dwg

Description

The invention relates to the field of measuring technology and can be used to diagnose the condition of shafts and shaft lines in shipbuilding.

A device for controlling torsional vibrations is known (see RF patent No. 2044285, 1995), containing a housing fixed on an object, made in the form of two communicating vessels, an inertial element placed in the housing, a light source, a light guide installed in the housing and optically connected to the inertial element , which uses mercury, and a light source, a measuring unit with a photoconverter.

This device has the disadvantages that it is impossible to measure torsional vibrations with a frequency of more than 1 Hz, and, in addition, it uses a harmful material - mercury.

The closest in design is an electronic-mechanical device (torsiograph) with an analog-to-digital converter, selected as a prototype (see patent RU 60718 U1, 2007).

The disadvantages of this device are: the presence of wire strain gauges complicates the installation, adjustment and calibration of the device, the device must be fixed at the free end of the shaft line, which complicates the installation of the device, the device contains mechanical parts that wear out during use.

The technical result is an increase in the accuracy of measuring torsional vibrations.

It is achieved by the fact that a well-known device containing a housing, the shaft under study, additionally has a base in the form of a printed circuit board, fixed on the lower surface of the housing, on which a three-axis microelectromechanical accelerometer with a built-in analog-to-digital converter, a microprocessor connected to an analog-to-digital converter are installed and fixed. converter, a memory chip connected to the microprocessor, an information output device mounted on metal legs, made in the form of an LED graphic screen, and connected to the microprocessor, a storage battery connected to a voltage stabilizer fixed on the side surface of the housing, while the voltage stabilizer is connected to microprocessor, accelerometer, memory chip, information output device and touch buttons on metal legs to control the microprocessor and connected to it, the case is equipped with a transparent plastic cover with a toggle switch and a connector for transmitting information and charging the battery and is rigidly fixed on the test shaft with the help of fastening straps equipped with a ratchet lock.

The proposed device is schematically shown in the drawing (Fig. 1 - top view, Fig. 2 - cover with toggle switch and connector, top view).

The device consists of a body 1, a shaft 2 under investigation, has a base in the form of a printed circuit board 3, fixed on the lower surface of the body 1, on which a three-axis microelectromechanical accelerometer 4 with a built-in analog-to-digital converter 5, a microprocessor 6 connected to an analog-to-digital converter 5, a memory chip 7 connected to the microprocessor 6, an information output device 8 made in the form of a light-emitting diode graphic screen (OLED display) mounted on metal legs (not shown in the drawing) and connected to the microprocessor 6, a battery 9 connected with a voltage regulator 10 fixed on the side surface of the housing 1, while the voltage regulator 10 is connected to the microprocessor 6, accelerometer 4, memory chip 7, information output device 8 and touch buttons 11 on metal legs (not shown) to control the microprocessor 6 and connected with it, building 1 equipped with a cover 12 made of transparent plastic with a toggle switch 13 and a connector 14 for transmitting information and charging the battery 9. The housing 1 is rigidly fixed on the investigated shaft 2 using fastening straps 15, equipped with a ratchet lock (not shown in the drawing).

The device works as follows. The body 1 with a cover 12 made of transparent plastic is fixed on the test shaft 2 with the help of fastening belts 15, which are tightened with a ratchet lock. When the toggle switch 13 is pressed, power is supplied from the battery 9 to the voltage stabilizer 10. From the voltage stabilizer 10, power is supplied to the microprocessor 6, accelerometer 4 with a built-in analog-to-digital converter 5, touch buttons 11, memory chip 7, information output device 8. The output device 8 displays the result of the power-on self-test and after a few seconds the main menu is displayed. After selecting the "work" mode using the touch buttons 11, the device is completely ready for operation. The body 1, fixed with fastening straps 15, exactly reproduces the rotational movements of the shaft 2 under study. The accelerometer 4, which has been calibrated at the factory, perceives the accelerations occurring in the shaft 2 under study, after which the built-in analog-to-digital converter 5 transmits a signal to the microprocessor 6, which after conversion, it transfers data to the memory chip 7 and the information output device 8, which is used as an OLED display. Connector 14 is used to charge the battery 9 and transfer information to the computer.

The use of a 3-axis MEMS accelerometer with a built-in analog-to-digital converter allows for more accurate torsional vibration measurements without having to calibrate the device during installation. The microprocessor promptly processes the data received from the accelerometer and transfers them to the memory chip and the information output device. The memory chip stores the received data for a long time. The information output device allows you to monitor the operation mode of the torsiograph. The battery allows you to accumulate energy for the purpose of its subsequent use to supply power to the voltage regulator, which distributes it between the elements of the device and stabilizes the voltage. Touch buttons serve for convenience of management of the microprocessor. The printed circuit board allows you to place, fix and connect the elements of the device. The transparent plastic cover protects the device elements from mechanical damage and allows you to control the touch buttons and monitor the information output device. Using the toggle switch allows you to turn the device on and off. Using the connector, the battery is charged and information is transmitted to the computer. The use of fastening belts and a ratchet lock allows you to fix the device in any place of the investigated shaft.

A positive effect - the proposed torsiograph is easy to use, allows more accurate measurement of torsional vibrations of shafts and shafting in shipbuilding, ship repair, as well as measurement of structural vibrations, without calibrating the device after installing it in any convenient place of the object under study.

Claims (1)

A torsiograph containing a housing, characterized in that it additionally has a base in the form of a printed circuit board, fixed on the lower surface of the housing, on which a three-axis microelectromechanical accelerometer with a built-in analog-to-digital converter, a microprocessor connected to an analog-to-digital converter, a memory chip are installed and fixed, associated with the microprocessor, an information output device made in the form of an LED graphic screen, mounted on metal legs and connected to the microprocessor, a storage battery connected to a voltage stabilizer fixed on the side surface of the case, while the voltage stabilizer is connected to the microprocessor, accelerometer, memory chip , an information output device and touch buttons on metal legs for controlling the microprocessor and connected to it, the case is equipped with a transparent plastic cover with a toggle switch and a connector for transmitting information and charging acc. battery and is rigidly fixed on the test shaft using fastening straps equipped with a ratchet lock.

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