RU201688U1 - MEASURING AND RECORDING DEVICE - Google Patents

Abstract

The utility model relates to measuring equipment, in particular to devices for determining the length of objects made of magnetic materials or their component parts, including for carrying out work on measuring sections of welded metal structures, certification of pipelines and fixing distances to supports, intersections, welds The device contains a measuring wheel made of magnetic material, which transmits rotation to an incremental encoder through a common axis. The measuring wheel, incremental encoder and housing are attached to a connecting rod. The housing contains: a microcontroller with an analog-to-digital converter (ADC), a screen for displaying information, a power supply, a control unit and a recording unit, and a handle is rigidly fixed on the outside of the case for the convenience of using the device. The device provides measurement of the length of objects made of magnetic steel or their sections with automatic recording of measurement results and other properties of measured objects, such as types of objects (pipe, transition, bend, angle, channel, etc.), the main characteristics of objects (diameter, profile), features (supports, intersections, welded seams, etc.). 2 fig.

Description

The utility model relates to measuring technology, in particular to devices for determining the distances and lengths of objects made of magnetic materials (for example, carbon steels) or their components, including for carrying out work on measuring sections of welded metal structures, certification of pipelines and fixing distances to supports, intersections, welds in relation to the measurements.

Known measuring wheel (patent US 20060156573 A1) containing a measuring wheel, a connecting rod, a mechanical counter and a handle. The wheel and the counter are interconnected by a transmission rod. A counter with an indicator of the distance traveled is located on the handle for easy reading of information and ease of use. Also, the device uses a magnetic mechanism to prevent arbitrary rotation of the wheel, which provides a more accurate measurement, eliminating idle spinning. This device is used to measure the length of roads or other distances over the earth's surface and does not allow recording additional features of the measured objects. When measuring smooth or painted surfaces, the coefficient of adhesion between the measuring wheel and the surface of the measured object is low, while the anti-roll mechanism creates additional force to turn the measuring wheel, in such conditions, the possibility of wheel slip on the measured object is created, which leads to distortion and errors in the measured parameters.

A known universal road curvimeter (RF patent 2261302) includes a bogie with three wheels, one of which is a measuring one, a path sensor, a spatial orientation unit, a pocket personal computer, a battery and a control system. The distance sensor is mounted on the measuring wheel and includes magnetic elements and a Hall sensor. When the measuring wheel rotates, the generated pulses are transmitted to the controller of the control system, providing a measurement of the distance traveled by counting the received pulses. The block of spatial orientation is based on measuring the increments of the angular velocities of the sensitivity axes and integrating the obtained values. Pocket personal computer controls the operation of the curvimeter, accumulation and display of measured parameters. The device is designed to measure the geometric parameters of highways: distances, evenness, transverse slopes and curve characteristics. This device in automatic mode allows recording the physical features of the measured objects, but does not allow adding them manually. When rolling on steel surfaces, the measuring wheel has the possibility of slipping due to dirty areas, which leads to errors and distortion of the measured parameters.

Known measuring wheel for magnetic steels (patent US 3295215), consisting of an assembly wheel connected by a shaft with a counter. The collecting wheel consists of steel disks made of magnetic steel, between which are located rubber wheels, with magnets included in them. The wheel is mounted on a measured metal band, so that the edges of the discs are frictionally engaged with the band. When the belt moves, the discs rotate, transmitting this rotation through the shaft to the counter. The use of a magnetic clutch eliminates the slippage of the measuring wheel on the moving belt, including those contaminated with oil. The measurement is carried out by linking the wheel circumference to a unit of measure and counting the number of wheel revolutions. The device is used for linear measurement of moving steel belts in production such as rolling or stamping. This invention provides grip of the measuring wheel with the surface, excluding slipping on the surface, but due to its purpose it is stationary and does not imply manual use. Also, the device does not have a block for fixing additional features of the measured objects.

The measuring wheel (US patent 20060156573 A1) is the closest device to the proposed utility model in terms of technical essence and the achieved result and is selected as a prototype.

The technical result of the utility model is to measure the length of objects made of magnetic steel or their sections with automatic fixation of measurement results and other properties of the measured objects, such as:

- types of objects (pipe, transition, bend, angle, channel, etc.);

- the main characteristics of objects (diameter, profile);

- features (supports, intersections, welds, etc.).

The technical result is achieved by the fact that the device contains a measuring wheel, a counter and a housing with a handle, fixed on a connecting rod, and the measuring wheel is made of magnetic material, which ensures uniform movement over metal structures without slipping, and an incremental encoder is used as a wheel revolution counter, connected to the measuring wheel by a common axis and transmitting information in digital form to a microcontroller with an ADC connected to a control unit, a recording unit and a power supply located in a housing equipped with a screen for displaying information.

FIG. 1 shows a general view of the device, FIG. 2 shows the enlarged electronic circuit of the device.

The device contains a measuring wheel 1 made of magnetic material, transmitting rotation to an incremental encoder 2. Measuring wheel 1, an incremental encoder 2 and a housing 3 are attached to a connecting rod 4. In housing 3 there are: a microcontroller with an analog-to-digital converter (ADC) 5, a screen for information output 6, power supply 7, control unit 8, recording unit 9, and a handle 10 is rigidly fixed on the outer side of the case for ease of use of the device.

The distance traveled by the measuring wheel is calculated using the formula:

Where: e _i - the number of pulses received from the encoder;

π is a constant equal to 3.1416;

R is the outer radius of the magnetic wheel;

Ε - number of pulses issued by the incremental encoder per one complete revolution of the measuring wheel.

The encoder and the measuring wheel are connected by a common axis. The accuracy of measuring the distance traveled can be changed by using an encoder with more or less pulses or by changing the diameter of the measuring wheel.

The device works as follows:

At the beginning of measurements, the name or number of the measured section is set through the control unit, the standard size of the first measured element is set. The measuring wheel is installed at the beginning of the section to be measured. The distance traveled is marked as "0". In the parameters of the standard size of the first element of the object, the following are indicated: the type of element (pipe, transition, elbow, tee, faucet, angle, channel, etc.), diameter or designation of the section. The device moves along the surface of the element, while the measuring wheel rotates, and the encoder connected to the measuring wheel transmits pulses to the ADC. If, when measuring the length of an element, there are supports, intersections with communications, defects, welds or other features on it, this is noted on the control unit by pressing the appropriate key (or key combination), the following is recorded on the recording unit: distance traveled from the beginning measurements, from the beginning of the element; the type of feature being registered; its serial number and other required parameters. When the end of the measured element (expressed as a weld seam, flange connection, threaded connection) is reached during the measurement process, this is also recorded through the control unit. The registering unit records information about the total length, the type of element traveled, its length and serial number, the type of connection achieved and other parameters. The distance traveled indicator for the new element takes on the value "0", the total distance of the segment continues to accumulate until the operator's instructions. If necessary, the parameters of the next measured element are specified by changing the data about it through the control unit, then the cycle is repeated. All recorded values of the numbers of sections and connections of elements can be adjusted at the beginning of measurements, and automatically increase according to the mark of their passage, they can also be corrected when carrying out work through the control unit.

As a result, structured information is accumulated in the memory of the recording unit, containing the measured sections of objects with a total length, a list of elements with their standard sizes and lengths, the features on them and distances to features both from the beginning of the section and from the beginning of the element.

Storing information in digital form allows you to use it with a high degree of automation when entering it into databases, compiling reports based on measurement results, counting the number of features of various types, the total length of the site, the number of elements of a certain standard size and other parameters during certification or examination.

The device can be implemented on the basis of ATmega168, ATmega328, ATmega2560, Cortex-M3 and others microcontrollers with at least 512 bytes non-volatile memory for storing calibration data. As an encoder, it is possible to use an electro-optical incremental encoder, for example, Encoder-400, LPD3806-400 VM. The body of the device is made of an aluminum alloy, hard plastic or other material similar in characteristics to aluminum-based alloys.

Claims (1)

Measuring and recording device for measuring the length of objects made of magnetic steel, containing a measuring wheel, a counter and a housing with a handle, fixed on a connecting rod, characterized in that the measuring wheel is made of magnetic material, which ensures uniform movement over metal structures without slipping, and as The wheel revolution counter uses an incremental encoder connected to the measuring wheel by a common axis and transmitting information in digital form to a microcontroller with an ADC connected to a control unit, a recording unit and a power supply located in a case equipped with a screen for displaying information.

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