JPS61114151A - Identifying device for heterogeneous metal - Google Patents

Abstract

PURPOSE:To identify the kinds of metallic materials accurately in a short time by bringing an electrode sensor for specific temperature and an electrode sensor for different temperature into contact with a member to be inspected with specific pressure. CONSTITUTION:Heterogeneous materials, e.g. normal iron pieces 2a and 2b are brought into contact with alloy iron 1 as the member to be inspected by springs 7 and 7' with the constant contact pressure. A heater 3 is incorporated in one electrode 2a and its temperature is adjusted by a temperature controller 4, and the other electrode 2b, on the other hand, is held at the room temperature. Then, electromotive force generated when the member 1 contacts the electrodes 2a and 2b is inputted to a comparator 5, whose comparison result is amplified 6 and displayed. This display is classified by coloring to identify the kind of iron.

Description

[Detailed description of the invention] 12! ``Evening''! The present invention relates to an apparatus for discriminating different metal materials.

Higashimoto ■l- Taking the steel plates used for car bodies as an example, generally when car bodies are made, they are made of iron plates and painted, but in the United States and other countries, they are coated with something like calcium chloride to prevent the roads from freezing in the winter. 1. Because of this, galvanized iron plates are now used for car bodies because they are more resistant to adhesion to the body of a running car and the car body is more likely to corrode. Again, KfIk's latest iron plate and 1. Iron plates mixed with titanium also began to appear on the car body. However, these dissimilar steel plates were mixed together in a car body factory, and it was impossible to tell them apart just by shining a light on them. Otherwise, identification will be hindered.

Koto! The inventor of the present invention has conducted various studies on FX and AK, and has discovered that sparks from welding fly and cut like in a car body shop.
In work sites where cutting, drilling, etc. produce smoke and dust, and where there is a lot of noise and vibration, it is very easy to perform delicate measurements, and electromagnetic measurements that utilize the magnetism of iron are not practical. I understand.

As a result of further trial production and experiments, the present inventor has found that it is promising to utilize thermoelectromotive force in such work sites. Thermoelectromotive force is also known as the Seebeck effect, and is a phenomenon in which thermoelectromotive force is generated in the circuit when the two connection points of a closed circuit made of two different types of conductors are kept at different temperatures. Different thermoelectromotive forces are generated by different conductor materials. However, it was also considered that such thermoelectromotive force may be affected by temperature and contact pressure.

My skin...! Therefore, in the present invention, for test members made of various different metal materials,
Distinguish the type of each metal material by bringing an electrode sensor at a predetermined temperature to be heated and an electrode sensor at a different temperature into contact at a predetermined pressure.1. It is characterized by a vine-like structure, and is capable of discriminating different metal materials in a short time, accurately, and at low cost.

By doing this in the present invention, as long as the temperature of both electrodes and the pressure on the member to be tested are kept constant and the materials of both electrodes are constant, the value of the thermoelectromotive force of the member to be tested can be adjusted. Determined according to metal and alloy.

The type of metal material can be identified more accurately in a shorter time than with K.

1 Next, an embodiment of the device of the present invention will be described with reference to the drawings.
is 2a if the test member is a ferroalloy such as titanium iron.
, 2b are a pair of metal electrodes made of, for example, ordinary iron, which is different from titanium iron.

The electrode 2aK has a built-in heater 3.1. Temperature controller 4
Adjust the temperature with 17. The electrode 2a is kept at a temperature of 100'C, for example, at a level that does not cause deterioration such as formation of a black film due to heating 17, and the electrode 2b is kept at room temperature.

Further, a constant contact pressure is maintained between the respective electrodes 2a and 2b by springs 7 and 7'.

Thus, if the test member is made of the same material as the electrode 2a, the thermoelectromotive force is 0.
However, if the same iron plate is made of different materials such as a titanium iron plate, a thermoelectromotive force is generated due to the Seebeck effect mentioned above, which is compared by the Y comparator 5 and amplified by the amplifier 6 for display. For example, the thermoelectromotive force Z standard is 0.5 millivolts, and if it is lower than that, for example, 0.1 millivolts, a blue lamp is lit, it is determined that it is a rotating iron plate, and if a thermoelectromotive force of 0.8 to 1 millivolts is generated, a red lamp is lit. In this case, if the red lamp lights up, it will be judged as a high-tension steel plate and will be discriminated.

This discrimination can also be carried out between iron plates and different iron plates, such as iron plates containing titanium and iron plates not containing titanium, as well as galvanized iron plates and non-galvanized iron plates. If the thermoelectromotive force of a metal is prepared, the material can be identified. Furthermore, although the above description has been made regarding steel plates for car bodies, it can also be widely applied to metal materials other than car bodies.

Effects of the Invention As described above, in the present invention, as long as the temperature of both electrodes and the pressure on the test member are kept constant and the materials of both electrodes are constant, the value of the thermoelectromotive force of the test member will be equal to that of the metal. If these are prepared in advance, the type of metal material can be identified accurately in a short time.

[Brief explanation of drawings]

The figure is a simplified block diagram showing one embodiment of the present invention. In the figure, 1 is a member to be tested, 2a and 2b are electrode sensors, 5 is a heater 14 is a heating regulator, 5 is a comparator, 6 is an amplifier, and 7
．． 7' is a spring.

Claims (2)

[Claims] (1) Distinguish the type of each metal material by bringing an electrode sensor heated to a predetermined temperature and an electrode sensor at a different temperature into contact with each other under a predetermined pressure against a test member made of various different metal materials. 1. A discriminating device for dissimilar metal materials, characterized in that it is capable of discriminating different metal materials. (2) The device for discriminating different metal materials according to claim 1, wherein the different metal materials also include various plating layers.