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Resistivity detector and resistivity detection apparatus

A detection device and detector technology, which is applied in the direction of measuring devices, accessory devices, fluid resistance measurement, etc., can solve problems such as difficult to find, difficult to visually detect element dirt, deviation, etc., so as to avoid forgetting to check and easy to check dirt Effect

Inactive Publication Date: 2006-05-17
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the case of a wire electric discharge machine, the ion exchanger or the like is used to perform feedback control so that the specific resistance of the detected solution becomes a predetermined value, so it is difficult for the operator to detect contamination of the detection element of the detector that detects the specific resistance. As a result, the specific resistance of the machining fluid deviates from the detected specific resistance
In addition, it is difficult to detect the dirt of the element visually

Method used

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  • Resistivity detector and resistivity detection apparatus
  • Resistivity detector and resistivity detection apparatus
  • Resistivity detector and resistivity detection apparatus

Examples

Experimental program
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Effect test

no. 1 Embodiment approach

[0042] According to this embodiment, the specific resistance detector for detecting the specific resistance of a solution uses two detectors, a main detector and a sub detector, which detect different resistance values ​​when measuring the resistance value of the same solution. here,

[0043] Assuming that the detection element of the main detector (hereinafter referred to as the main detection element) has no dirt attached to it, the resistance value of the solution between the main detection elements is R0 ... (1)

[0044] The resistance value of the solution between the sub-detection elements when the detection element (hereinafter referred to as the sub-detection element) of the sub-detector is not attached to dirt is R0 / χ. …(2)

[0045] In addition, when dirt is attached to both the main detection element and the sub-detection element, the resistance value of the dirt attached to each detection element is Rd. then,

[0046] When dirt is attached to the main detection ele...

no. 2 Embodiment approach

[0058] If the main detection element and the sub-detection element are arranged to be immersed in the same solution, since the main detection element and the sub-detection element are placed in the same environment, the degree of contamination of the two detection elements is the same. Therefore, in the above-mentioned first embodiment, the detection resistance values ​​of the main and sub detectors are different (χ≠1) when the detection element is not stained as described above.

[0059] On the other hand, in the second embodiment, the detection resistance value between the main detectors and the detection resistance value between the sub detectors are set to be the same (χ = 1), and the difficulty of adhesion of dirt to the main detection element (the speed of dirt advancement) and the difficulty of adhesion of dirt to the sub-detection element (the speed of dirt advancement) are different.

[0060] On the surface of the object, dirt is easy to adhere to the rough side. The...

no. 3 Embodiment approach

[0083] This embodiment corresponds to a combination of the first and second embodiments described above.

[0084] In this embodiment, when the main detector and the sub-detector are immersed in the same solution, when there is no dirt attached to the main detection element and the sub-detection element, the resistance value of the working fluid between the sub-detection elements is different from that of the main detection element. The resistance value of the machining fluid differs between detection elements. Furthermore, it is configured so that the difficulty of adhesion of dirt to the sub-detection element (the advancing speed of dirt) is different from the difficulty of adhesion of dirt to the main detecting element (the advancing speed of dirt).

[0085] Here, in the state where no dirt adheres to the main detection element and the sub-detection element,

[0086] Assume that the resistance value of the solution between the main detection elements is R0, ...(14)

[0087...

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Abstract

Provided is a specific resistance detector including a main detector and a sub detector for measuring the resistance value of a solution. According to the output signals Ew1 and Ew2 of the main and auxiliary detectors, the dirt of the detection elements of the main and auxiliary detectors is detected. It is made to produce a speed difference when the detection element is fouled, or it is set to measure the resistance value of the same solution when the detection element is not polluted, and obtain different resistance values ​​from the output of the main and auxiliary detectors. When the detection element is contaminated, the ratio of the resistance values ​​obtained by the main detector and the sub-detector changes, and it is determined that the detection element is contaminated based on this change.

Description

technical field [0001] The present invention relates to a specific resistance detector and a specific resistance detection device for detecting the specific resistance of a solution such as a working fluid used in a wire electric discharge machine or the like. Background technique [0002] In a device that performs machining in a machining fluid such as a wire electric discharge machine, in order to maintain a constant machining accuracy, it is necessary to keep the specific resistance of the machining fluid constant. For this purpose, the specific resistance of the machining fluid is detected using a specific resistance meter, the set value is compared with the detected specific resistance value, and an ion exchanger is used to perform control so that the specific resistance of the machining fluid is maintained at a predetermined value. [0003] use Figure 9 An example of a conventionally used specific resistance detector using a DC power supply will be described. In this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/22
CPCB23H1/10B23H7/36B23H11/00G01N17/008G01N27/06
Inventor 喜多佑树樱井章博
Owner FANUC LTD
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