Digital brinell hardness tester

Abstract

The invention discloses a digital brinell hardness tester. The digital brinell hardness tester comprises a sampling circuit, an amplifying circuit, an analogue-to-digital conversion circuit, a processor, a display, a driving circuit, a printer and an RS232 interface circuit, wherein the sampling circuit is used for acquiring an analogue signal of a pressure sensor and transmitting the analogue signal to the amplifying circuit; the amplifying circuit is connected with the sampling circuit, amplifies the acquired analogue signal and transmits the amplified analogue signal to the analogue-to-digital conversion circuit; the analogue-to-digital conversion circuit is connected with the amplifying circuit and performs conversion process on the analogue signal amplified by the amplifying circuit to convert the analogue signal into a digital signal; the processor is connected with the analogue-to-digital conversion circuit and processes the digital signal processed by the analogue-to-digital conversion circuit; the display is connected with the processor and displays a measurement value of the digital brinell hardness tester; the driving circuit is connected with the processor; the printer and the RS232 interface circuit are connected with the processor; the measurement value is printed and output by the printer; and by the RS232 interface, the measurement value is input into a computer. By the digital brinell hardness tester, a test force is precise, and no noise is produced during test.

Description

technical field [0001] The invention relates to a hardness measuring device, in particular to a digital display Brinell hardness tester. Background technique [0002] The Brinell hardness test method was first proposed in 1900 by J.A.Brinell, the chief engineer of Fagastra Steel Works in Sweden, and exhibited his products in the same year. It has been affirmed, so it is customarily called the Brinell hardness test method. The Brinell hardness test method is widely used, and it can test the hardness of metal raw materials, normalized, quenched and tempered and quenched parts. Because the test force of the Brinell hardness tester and the steel ball indenter are large, the indentation is also large, so it is especially suitable for the hardness determination of castings, bearing alloys and metal materials with coarse grains. The Brinell hardness test method can measure relatively large The comprehensive performance of each component of the metal in a wide range, without being...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a digital display Brinell hardness tester, which can solve the problems of the existing Brinell hardness tester that the small force is inaccurate, the noise is large when loading and unloading the test force, and the display screen shakes when displayed

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