TR202009847A1 - A METHOD AND AN DEVICE FOR ROTARY SHAFT SPEED MEASUREMENT - Google Patents

Abstract

The invention is an inductive power source that does not need to use any sensors and cable connections located on the rotating shaft (1) by using the lowest and highest values of the magnetic field and voltage amplitudes to measure the number of revolutions (rotation) of the rotating shafts (1) used in the industry. It relates to a speed measuring device which provides the speed measurement method provided by the conveying system.

Description

DESCRIPTION A METHOD AND AN DEVICE FOR ROTARY SHAFT SPEED MEASUREMENT Technological Field: The invention enables the measurement of revolutions (rotation) numbers of rotary shafts used in industry. lowest and highest magnetic field and voltage amplitudes to make Using the values, any sensors and cables located on the rotating shaft With inductive power transmission system that does not require the use of connection It relates to the speed measurement method and equipment provided.

Known Status of the Technique: Rotary shafts are elements that are frequently used in the known art and industry. Rotary The rotation speeds of shafts are important factors in the machines, devices and systems in which they are used. It is a parameter and needs to be measured and controlled. Description The subject invention describes a method and equipment for measuring the speed of rotating shafts. It does.

In known art, in rotary shaft speed measurement systems, The use of embedded sensors is common. In other methods, it returns Measurement is provided by the additional apparatus placed on the shaft. This The general disadvantage of these methods is the sensor placed on the rotating shaft and The apparatus causes a multiplicity of cables on the rotating shaft and the sensors It requires additional power.

The disadvantages of the methods used in the known technique are listed below.

- The sensor system is located on the rotating shaft and provides energy to the sensor. It requires cabling because it has to be supplied.

- Stabilization of sensors changes over time.

- The cables on the rotating shaft undergo deformation over time. Reliable data cannot be received from the sensor.

- The sensor on the rotating shaft does not give healthy results over time and Constantly changing the sensor causes costs.

In the literature research, the Russian language numbered RU was encountered. measurement of axial loads and RPM value of rotating shafts in the patent document A device that can be used for With the said device Claims to provide high reliability, measurement accuracy and ease of use is done. In the Russian patent document, provided with primary and secondary coils A measurement method has not been revealed, and as a disadvantage, it is not possible to Reference elements are placed.

Numbered KR encountered in the literature research, In the Korean patent document, the torque value and revolutions per minute of a rotating shaft A system is mentioned to measure the number of The mentioned system and device, a device for measuring first and second magnets, first and second It contains magnetic resistance sensors and a circuit board. Korean patent In the document, sensor elements positioned on the shaft were found.

Japanese study number JPH was encountered in the literature research. There is material loss in a sample called core in the patent document. A system is mentioned to measure whether it is present or not. In the mentioned document, A method provided with primary and secondary coils has not been found.

In other literature research, patent number U83952220A In the document, the device that provides speed measurement is used, numbered US 4306462A. provides speed measurement using a magnetic transducer in the patent document. From a method, using the output signals of the US 4535288A converter A method that provides measurement is described in the document numbered US 5311123A. Thanks to the sensors placed on it and the signals produced by these sensors A method that provides measurement is mentioned.

In these patent studies examined, speed and torque measurement are generally used. were targeted and different techniques were tried on these measurements. to this time When we look at the techniques used until now, the first place is the use of sensors. is taking.

As a result, the known state of the technique has been overcome and its disadvantages have been eliminated. A rotary shaft speed measurement method is needed.

Brief Description of the Invention: The invention is one in which the known state of the technique is surpassed, its disadvantages are eliminated, and additional It is a rotating shaft speed measurement method with many features.

The purpose of the invention is to prevent any sensors, cables and additional equipment on the rotating shaft. The aim is to introduce a new rotating shaft measurement method that does not involve

Another purpose of the invention is the inductive power transmission system in rotary shaft speed measurement. To reveal the speed measurement method and equipment provided by .

Another purpose of the invention is to eliminate any sensor-related maintenance costs and operations. A new rotary shaft speed measurement method and equipment that does not require is to put.

All of the above mentioned and will emerge from the detailed explanation below. In order to achieve the objectives, the present invention uses rotary machines used in industry. In order to measure the revolutions (rotation) of the shafts, magnetic field and using the lowest and highest values of voltage amplitudes, the rotating shaft The need to use any sensors and cable connections located on The speed measurement method provided by an inductive power transmission system that does not hear has emerged. It is a speed measurement device that measures the number of revolutions, and its feature is; any machine, device or creating a magnetic field from the element and voltage to the secondary rectangular coil It contains at least one primary rectangular coil to induce the rotary shaft bottom At least one wave induced by the primary rectangular coil attached to its surface containing a secondary rectangular coil, said secondary rectangular coil primary with secondary rectangular coil due to rotation with the rotating shaft voltage, which measures the peaks of voltage amplitudes between rectangular coils determine the return period by measuring the time it takes for the amplitudes to reach their peaks. After the rotation period is determined, it returns with the formulas f=1/T and N=60*f It is characterized by containing at least one microcontroller that calculates the shaft speed. is to be done.

Explanation of Figures: The invention will be explained by referring to the attached figures, so that the invention is features will be more clearly understood. However, the purpose of this is obvious It is not limited by regulations. On the contrary, the invention is claimed in the accompanying claims. All alternatives, modifications that can be included within the scope defined by and its equivalences are also intended to be covered. Details shown are only Preferred embodiments of the present invention are illustrated for purposes of illustration and rules and concepts of both shaping methods and invention. In order to provide the most useful and easily understandable description of its features It should be understood that they are presented. In these drawings; Figure-1 For circular inductive power transmission system in known technique is a representative view.

Figure-2 The device for rotary shaft speed measurement according to the invention It is the view at the position where the induced voltage is maximum.

Figure-3 The device for rotary shaft speed measurement according to the invention It is the view at the position where the induced voltage is minimum.

Figures that will help understand this invention are shown in the attached picture. They are numbered and given below with their names.

Disclosure of References: rotary shaft Primary circular coil Secondary circular coil mounting plate micro controller Primary rectangular coil Secondary rectangular coil Description of the invention: In this detailed explanation, the rotary shaft (1) speed measurement method and The device is intended only for a better understanding of the subject, without any limitation. It is explained with examples that will not create any impact. In the description, in the industry To measure the number of revolutions (rotation) of the rotary shafts (1) used, lowest and highest values of magnetic field and voltage amplitudes any sensors and cables positioned on the rotating shaft (1) using With inductive power transmission system that does not require the use of connection The speed measurement method and equipment provided are explained.

Figure 1 shows a view of the inductive power transmission system in the known technique. is taking. In fact, this system is the starting point of the invention. Therefore this system It is necessary to understand the working method well. Inductive power transmission systems, a one primary circular coil (2), one secondary circular coil (3) oscillator It consists of a circuit (input) and a receiver circuit. In these systems, primary circular The coil (2) acts as a transmitter and the secondary circular coil (3) acts as a receiver.

The secondary circular coil (3) is attached to the rotating shaft (1) via a mounting plate (4). is connected. Faraday principle is the basis of inductive power transfer and this According to the principle, any flux change in a conductor per unit time If this occurs, voltage is observed to be induced at the receiving end. between coils When induction occurs, the rotating shaft (1) rotates. Uninterrupted power transfer For this to happen, both the secondary coil and the primary coil are arranged in a circle. It must be wrapped. In this way, the magnetic effect created by the primary coil The field will almost completely cut the conductors of the secondary coil and a voltage will induce. From primary circular coil (2) to secondary circular coil (3) The induced voltage amplitude is due to the circular shape of the coils (2,3). has a constant value. But primary and secondary coils When the geometric shapes are changed, from the primary coil to the secondary coil The induced voltage amplitude varies from peak to peak. Because In the invention subject to the description, rectangular coils are used instead of circular coils (2,3). (7,8) is used, the voltage value induced between the rectangular coils (7,8) is By determining the minimum and maximum time intervals, the rotating shaft (1) The number of revolutions was measured. This is the brief summary of the invention. Also find out Although it was inspired by the inductive power transmission system during its development, The invention subject to the description is only used to determine the number of revolutions of the rotating shafts (1). It is used for this purpose.

Figure 2 and Figure Site are for measuring the rotational speed of the rotating shaft (1) subject to the invention. There are views of the device. Accordingly, the section of the rotating shaft (1) is The secondary rectangular coil (3) is attached to the mounting plate (4). Secondary rectangular coil (8) is connected by a primary rectangular coil (7) is induced. In this case, the rotating shaft (1) is in rotation. Rotary shaft (1) As it rotates, the secondary rectangular coil (8) rotates with it, two rectangular coil (7,8) first rotates the magnetic coupling field in every 90 degree rotation. After maximum it decreases to a minimum. Primary rectangular coil in Figure 2 (7) and the short and long edges of the secondary rectangular coil (8) are connected to each other. It matches. In this position, the magnetic gap between the rectangular coils (7,8) The coupling area is at its maximum value. In Figure 3, the primary rectangle The short and long edges of the coil (7) and the secondary rectangular coil (8) are opposite each other. It is matched. In this case, the magnetic coupling between the rectangular coils (7,8) area is at minimum value. In other words, two rectangular coils (7,8) In each 90 degree rotation, the magnetic coupling field first reaches maximum and then There is a minimum. Primary rectangular coil (7) with secondary rectangular The magnetic voltage amplitude value between the coil (8) is maximum When the time elapsed between values is calculated, the number of revolutions of the rotating shaft (1) can be calculated. To achieve this, speed measurement a microcontroller (5) integrated into the assembly with a cable (6) is used. The voltage amplitude is measured with the voltage meter within the microcontroller (5). measures their values. Also located in the microcontroller (5) A stopwatch runs via a timer. This stopwatch is the first maximum It is run when the value is seen, after the two minimum values, the second maximum It is stopped at . The elapsed time is the rotation period of the rotating shaft. This after measurement; f=1/T In accordance with the above formula, it is drawn as the following equation, N=60*f The turnover is calculated in accordance with this formula.

With the invention subject to the description, there is no need for a sensor or apparatus integrated into the rotating shaft (1). caused by two coils and the magnetic field change between them without hearing Rotary shaft (1) speed measurement is provided with voltage amplitudes.

Claims (6)

1- The invention does not require the use of any sensors and cable connections positioned on the rotating shaft (1) by using the lowest and highest values of magnetic field and voltage amplitudes to measure the revolutions (rotation) of the rotating shafts (1) used in the industry. It is a speed measurement device that provides a speed measurement method provided by an inductive power transmission system, and its feature is; .;. At least one secondary rectangular coil (induced by the primary rectangular coil (7)) is attached to the bottom surface of the rotating shaft (1) in order to create a magnetic field from any machine, device or element and to induce voltage to the secondary rectangular coil (8). 8) includes, - measuring the voltage amplitude peaks between the secondary rectangular coil (8) and the primary rectangular coil (7) resulting from the rotation of the said secondary rectangular coil (8) with the rotating shaft (1), - measuring the time it takes for the voltage amplitudes to reach their peaks. It is characterized by containing at least one microcontroller (5) that detects the rotation period and calculates the rotation of the rotating shaft (1) with the formulas f=1/T and N=60*f after the rotation period is determined. 2- It is a speed measurement device in accordance with Claim 1, and its feature is; It contains at least one stopwatch within the microcontroller (5) to measure the time it takes for the voltage amplitudes to reach their peaks. 3- It is a speed measurement device in accordance with claim 1, and its feature is; It contains at least one current meter and/or voltage meter and/or sensor within the microcontroller (5) to detect the voltage amplitudes between the secondary rectangular coil (8) and the primary rectangular coil (7). 4- It is a speed measurement device in accordance with Claim 1, and its feature is; It contains at least one mounting plate (4) that allows the secondary rectangular coil (8) to be mounted on the cross section of the rotating shaft (1). 5- It is a speed measurement device in accordance with Claim 1, and its feature is; It is characterized by containing at least one cable (6) to connect the microcontroller (5) to the primary rectangular coil (7). 6- It is a speed measurement device in accordance with Claim 1, and its feature is; primary rectangular coil (7) and secondary rectangular coil (8) elements have any form other than circular form in order to obtain minimum and maximum voltage amplitudes.