NHVS-1000AT image acquisition micro Vickers hardness tester

Product Introduction

lThe body is equipped with a CCD camera and can be optionally equipped with a computer and measurement software. Only one data cable is needed to connect the hardness tester to the computer, and then the software can be used for measurement. The image processing system has a simple and tidy appearance, and can also be equipped with a Knoop indenter for Knoop hardness measurement;

lTwo operation modes, dual light path system, the device retains traditional touch screen and micrometer operation measurement modes on the basis of using an industrial control integrated computer, providing users with more options for operation and calibration;

lThe body is made of high-quality cast iron and cast in one go, combined with automotive paint treatment technology, with a round and beautiful appearance;

lThe turbine worm lifting system effectively improves testing stability and accuracy, and there is no need to re focus after testing is completed;

lEquipped with automatic turret function, high-definition measurement and observation - dual objective lens combination, combined with high-definition micrometer eyepiece with built-in length encoder, realizes one click measurement of indentation diagonal, effectively reducing human operation interference and reading errors;

lConvenient CNC system that can automatically convert units of the full hardness scale;

lThe maximum and minimum hardness values can be set, and when the test value exceeds the set range, a buzzing sound will be emitted;

lEquipped with software hardness value correction function, it can directly correct the hardness value within a certain range;

lEquipped with database functionality, the experimental data can be automatically grouped and saved, with each group capable of storing 10 data points and more than 2000 data points;

lEquipped with a hardness curve display function, it intuitively displays the changes in hardness values;

lConfigure a wireless Bluetooth printer and output data through RS232 and USB (optional) interfaces;

lAccuracy meets GB/T4340.2 ISO6507-2And ASTM E384.

Technical Specifications:

Standard configuration of attachments:

The above is the standard configuration, and the actual product is subject to the actual product!

Software Function Introduction

image 2.1 main software interface

(1) Image hardness measurement function, supporting manual tangent measurement and manual corner measurement

(2) Support fine-tuning of image measurement results

(3) Support testing data list and hardening curve display, which can intuitively obtain data change trends

(4) History recording function: You can query records by time or part number and export reports

(5) Supports two image calibration methods: hardness block calibration and ruler calibration

(6) Gradient testing function, supports custom testing paths, supports exporting gradient testing reports

(7) Support the conversion between Vickers and various hardness values

(8) Depth conversion function, which can automatically convert Vickers indentation depth

(9) Provide Word, PDF, Excel Format report, supporting report content定制

(10) Support distance measurement and angle measurement functions

(11) Compatible with the measurement of Knoop hardness (HK), it can automatically identify the Knoop indentation

3 Hardness measurement

3.1 Basic Operations

image 3.1.1Hardness measurement related buttons

（1）Preview image

Main interface "automatic measurement ”The button above the button is red "Preview Image ”When in a state, you need to click on 'pre' View images ”Release the camera and measure after a clear indentation appears on the main image page.

（2）Image measurement

The software supports three ways of image measurement:

Automatic measurement: Click“ automatic measurement ”Automatically recognize indentation and obtain hardness results after pressing the button

Tangent measurement: Click on "Tangent measurement ”Click on the left, right, top, and bottom indentation cuts in the main image Hardness measurement at the edge of the line

Corner measurement: Click on "Corner measurement ”Click on the four corner points of the indentation in the main image to achieve hardness measurement

（3）Fine tuning of measurement results

When the measurement results are inaccurate, the results can be fine tuned. There are two ways to achieve hardness fine-tuning: Directly drag the inaccurate edge of the indentation red box in the main image;

Select image 3.1 The recognition edge items to be adjusted in the middle (top, bottom, left, right)），Then click to increase or decrease Small, achieve an edge adjustment. Adjusting up or down refers to adjusting the red box of the indentation in the direction of increasing or decreasing.

3.2 The measurement results show that

After the measurement is completed, there will be a red box in the main image to enclose the indentationIf the measurement is inaccurate, the measurement results can be fine tuned.

image 3.2.1Impression diagram display

The current hardness test result can be displayed in the upper right corner of the software, which is green when it is qualified and red otherwise. simultaneously It can display information such as hardness conversion value, length and width value of indentation, current lens, test force, and qualified hardness range.

image 3.2.2Measurement result display interface

3.3 Current measurement result list

The current test result list can be displayed in the lower left corner of the software. Clicking on a line in the list will display it in the main image Detailed information about the data.

Click on the main page to export the report ”After clicking the button, the data in this list can be exported to the report. Click on the main page to clear the list ”After clicking the button, the list can be cleared.

image 3.3.1Measurement result display interface

3.4 Hardness curve

The hardness curve can be displayed in the lower right corner of the software, and the hardness values in the current test result list can be plotted as a curve, Easy to observe the trend of hardness changes.

image 3.4.1Measurement result display interface

4 Image assistance tools

image 4.1 Image Assistance Toolbar

The image auxiliary toolbar above the software main image provides several tools for users to use, where they can proceed Partial image manipulation.

（1）Read image: Load offline image for image measurement testing

（2）Storage image: Save the current indentation image

（3）Display marking: Display the cross marking in the main image

（4）Reset the marking: Reset the marking to the center of the main image, and drag the center of the marking to move its position

（5）Hidden markings: Hide the cross markings in the main image

（6）Image enlargement: enlarge to display the main image

（7）Image reduction: Reduce the display size of the main image

（8）Knoop hardness: HK scale

（9）Fracture indentation: testing fracture toughness

s Measurement parameter settings

5.1 system parameter setting

image 5.1.1System parameter setting interface

Click on "System Settings" on the main page ”The button can bring up the system settings interface as shown in the above figure, and the software is large Most parameter configurations are implemented on this page. Including the following parameter settings:

（1）Lens magnification: Switch the test lens, see details 5.2

（2）Test pressure: Switch test pressure, see details 5.3

（3）Conversion ruler: Switch hardness conversion ruler, see details 5.4

（4）Hardness range: Qualified range, i.e. minimum qualified hardness and maximum qualified hardness

（5）Decimal places: The number of decimal places included in the hardness value, reflected in the hardness list and report

（6）Pressure unit: optional gor kgAs a unit of pressure

（7）Nu's measurement: When turned on, it will automatically switch to Nu's measurement software

（8）Conversion depth: After activation, the indentation depth will be automatically converted and reflected in the hardness list

（9）Image calibration: Calibrate the correspondence between image pixels and the physical dimensions of the workpiece, as detailed in 5.8

（10）Report settings: Set the content of the report, see details 5.5

（11）Language settings: Switch between Chinese and English

（12）Report type: Switch to default report type on the main interface, supports word ThepdfTheexcel

（13）Camera Name: Select here when multiple cameras are inserted into the computer, and it will take effect after restarting the software

（14）Camera input: Set the camera image format, resolution, etc., see details 5.6

5.2 Camera selection

The software supports lens settings with two resolutions, as shown in the following figure. You can click on "Lens" in the system settings magnification ”Call up this interface, or click on "Lens" in the result display bar of the main interface ”Call up the selection interface.

image 5.2.1Lens selection interface

5.3 Experimental force selection

Software supports commonly used 16 Test the pressure in the middle, as shown in the following figure. You can click on "Test" in the system settings pressure ”Call up this interface, or click on "Test Force" in the result display bar of the main interface ”Call up the selection interface.

image 5.3.1Test force selection interface

5.4 Hardness Conversion Settings

The software supports converting Vickers hardness to other hardness, and the type of conversion can be selected on the conversion scale interface.

image 5.4.1Hardness conversion type selection interface

5.5 Report format setting

Basic information: Inspection unit, part name, execution standard, sample description and other information will be automatically filled in the report Report the basic information column.

Report Title: The title of the report

Image mode: Set whether the report includes indentation images, only print the first indentation image, or all indentation images. Hardening curve: whether to print the hardening curve.

Basic information: All basic information in the report can be set to use the current setting value, or hardness testing can be used The setting value of the trial mainly refers to the situation where different basic information is used for testing data in different periods of historical records

The situation.

image 5.5.1Report format setting interface

5.6 Camera parameter settings

The software can configure parameters such as camera resolution, brightness, contrast, etc.

If you want to modify the image format, image resolution, etc., please click on "Camera Input Settings" in the system settings ”， It will appear as shown in the picture 5.6.1 Please be cautious when modifying the image resolution on the interface, and re calibrate the image after modification.

If the imaging is not clear, you can click on the "Camera Settings" button on the main interface ”The software automatically retrieves it 5.6.2所示界 Users can modify parameters such as brightness, contrast, and white balance until a clearer indentation appearsImage.

image 5.6.1Camera image format setting interface

image 5.6.2Camera optical parameter setting interface

5.8 Image calibration

Image calibration can determine the correspondence between camera pixels and the physical dimensions of the workpiece. Before calibration, please set Set the camera resolution. If you want to modify the camera resolution, you need to recalibrate it.

Click on the image calibration in the system settings to bring up the calibration interface. The software supports every compression for each lens Calibrate the force values separately, select the lens magnification and test pressure values, and click "Fill in" ”The button can be used for this mirror Add separate calibration coefficients to the head and pressure values. All coefficients that have been filled in will appear in the list on the left, unfilled The added factor will automatically search for a coefficient that is close to its own pressure, and at least one factor must be added for each lens magnification.

（1）Calibration of hardness indentation method

Before entering the calibration page, perform indentation measurement to ensure the accuracy of the main interfaceThe red box just frames the indentation.

Select the current lens magnification and pressure value from the coefficient list on the left, and enter the calibration on the indentation calibration page on the right Block hardness, click on 'Calculate coefficient' ”At this point, the calibration coefficient will be automatically filled in on the interface, and the calculation will be done when there are no issues Click the 'Calibration' button ”Complete the current coefficient calibration.

image 5.8.1Indentation calibration interface

（2）Calibration of ruler method

Place a standard ruler horizontally below the lens, and then call up the calibration page. Switch to the ruler calibration page, Click on 'ruler measurement' ”Button, the software will automatically switch to the main interface and start the image drawing process. On the ruler Click the left mouse button on one scale position, move the mouse to another scale and click the left mouse button again, then the software Automatically jump back to the calibration interface and enter the distance between the two scales you just clicked on as the 'physical distance' ”Column, however Click on 'Calculate Coefficient' afterwards ”->Calibration ”Complete the current coefficient calibration.

image 5.8.2Scale calibration interface

6 gradient test

6.1 Create Path

Before gradient testing, it is necessary to plan the testing path in advance and input the distance from each testing point to the previous one in the depth list Interval between test points (input the first value as the distance between the first point and the edge of the workpiece)），Separate with spaces, and then Click to create a path, and a list of paths will appear on the left.

image 6.1.1Test path setting interface

6.2 hardness test

After setting up the testing path, start testing and fill in the hardness of the corresponding point in the path list for each testing point Value.

After the test is completed, if you want to test the next workpiece, you can click to clear the record, and the test path will be retained at this timeThe path can be used to conduct the same test on different workpieces.

When you want to modify the test path after completing or partially completing the dotting, you can directly modify the depth list and click create pathAt this point, the hardness results of the dots will be retained.

6.2.1Gradient measurement result display interface

6.3 gradient calculation

After testing all points in the path, click on "Gradient Analysis ”The button will display the gradient analysis interface. The interface contains information such as hardness value curve and hardness value list.

After selecting the depth unit and critical hardness, click on the hardening layer analysis to automatically calculate the hardening layer depth and The results are plotted in a chart.

image 6.3.1Gradient analysis interface

6.4 print report

After entering the sample properties at the bottom of the gradient analysis interface and clicking on export report, the report will be automatically generated The formula is shown in the following figure.

The software supports three report formats:Word ThePDF TheExcel Can the configurable report include indentation The picture.