CN206515454U - Epstein square circles for becoming the measurement of temperature state magnetic - Google Patents

Abstract

The utility model discloses an Epstein square ring used for magnetic measurement in a variable temperature state. The Epstein square ring includes an Epstein square ring base, and four Epstein square ring winding skeletons are arranged symmetrically in pairs on the upper surface of the Epstein square ring base. The Epstein square coil winding frame is a square body, and the Epstein square coil winding frame is wound with an Epstein square coil winding coil, the two ends of the Epstein square coil winding frame are open, and the opposite faces of the four Epstein square coil winding frames are connected end to end to form For the square ring, a plurality of square thin-film thermocouples are arranged symmetrically on the base of the Epstein square circle directly below the winding skeleton of the Epstein square ring, and an induction probe is arranged in the center of the upper surface of the thin-film thermocouple 5 . The Epstein square ring used for magnetic measurement in variable temperature state of the utility model overcomes the deviation of the measurement result caused by the destruction of the magnetic field distribution of the winding coil by the original technical scheme, and at the same time truly reflects the temperature gradient on the surface of the sample.

Description

Epstein square rings for magnetic measurements at varying temperatures

technical field

The utility model relates to an Epstein square ring, in particular to an Epstein square ring used for magnetic measurement in a variable temperature state.

Background technique

At present, the most original definition of the Epstein square circle mainly comes from GB/T 3655. This standard mainly regulates the size and structure of the commonly used 25cm Epstein square circle, but the Epstein square circle under this standard is only suitable for normal temperature conditions. The magnetic measurement of (temperature range is 23 ± 5 ℃).

As for the patent on the design of the Epstein square ring under the variable temperature state, only a utility model patent (application number 201520684095.3) has been found so far. The description about the Epstein square ring is: the Epstein square ring magnetic permeability meter is set in a high and low temperature test chamber Inside, the shell of the magnetic permeability meter is made of high temperature resistant stainless steel, the winding is a high temperature resistant enamelled copper core winding, and the electronic thermocouple is equipped with an ambient temperature thermocouple probe and a sample temperature thermocouple probe, wherein the ambient temperature thermoelectric The couple probe is suspended in the high and low temperature test chamber, and the sample temperature thermocouple probe is set in the sample to be tested in the working state, and the magnetic testing module is electrically connected with the Epstein square magnetic permeability meter and the electronic thermocouple.

However, within the test range of -40°C to 150°C, refer to the corresponding standard requirements: at least one thermocouple is fixed at the position where the Epstein square coil winding contacts the surface of the sample to monitor the temperature of the sample. The temperature of the sample shall be the minimum value of one or more measurement points, and the fluctuation of the sample temperature during the measurement shall meet the requirements within ±2°C of the specified temperature. The standard requires the temperature gradient on the sample during measurement. Since the length of one side of the Epstein square circle is 220mm, there should be at least 3 temperature measurement points.

There are two main types of Epstein square rings currently used for measuring magnetic properties under variable temperature conditions:

The first type is to insert a thermocouple after drilling a hole on the winding frame on one side of the Epstein square coil, which will destroy the magnetic field distribution of the winding coil during measurement and affect the measurement result;

The second type is to cover a piece of sample with a temperature measuring strip, and then insert the group skeleton. This method feeds back the average value of the temperature on the sample, and does not reflect the temperature gradient on the sample, and the temperature measuring strip becomes an easy-to-use Consumables.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an Epstein square ring used for magnetic measurement under variable temperature state. It overcomes the deviation of the measurement results caused by the destruction of the magnetic field distribution of the wound coil by the original technical solution

In order to achieve the above-mentioned purpose, the utility model designs a kind of Epstein square circle that is used for the magnetic measurement under variable temperature state, and described Epstein square circle comprises Epstein square circle base, and the upper surface of described Epstein square circle base is symmetrically arranged with four The Epstein square coil winding skeleton, the Epstein square coil winding skeleton is a square body, and the Epstein square coil winding coil is wound on the Epstein square coil winding skeleton, the two ends of the Epstein square coil winding skeleton are open, and the four Epstein square coil windings The opposite faces of the framework are connected end to end to form a square ring, and a plurality of square film thermocouples are symmetrically arranged on the Epstein square circle base directly below the Epstein square coil winding skeleton, and an induction probe is arranged in the center of the upper surface of the film thermocouple 5 .

Further, the Epstein square coil winding frame is made of high temperature resistant synthetic material, and the length, width and height of the inner cavity are 220mm, 32mm, 10-20mm.

Still further, the Epstein square coil wound coil is composed of a primary coil winding and a secondary coil winding alternately wound, the primary coil winding and the secondary coil winding are high temperature resistant enamelled copper cores, and the primary coil winding is φ= 2.24mm double-strand high-temperature-resistant enamelled copper core, and the secondary coil winding is a single-strand high-temperature-resistant enamelled copper core with φ=1.0mm.

Further, there are 3 thin-film thermocouples, one of which is located under the Epstein square coil winding skeleton, and the other two thin-film thermocouples are arranged symmetrically on both sides, and the length and width of the thin-film thermocouples are 15-25 mm. , The distance between the film thermocouples on both sides is 10-20mm from the edge of the Epstein square coil winding frame. The length and width of the thin film thermocouple are preferably 20mm×20mm to ensure full contact with the 30mm wide sample and the thin film thermocouple is not in contact with the winding frame, which can truly reflect the temperature change of the sample. The distance between the thin film thermocouples on both sides of the winding frame is 10mm, to prevent damage to the thin film thermocouple when the Epstein square ring sample is inserted.

Still further, the radius r of the sensing probe is 0.5-2 mm. The induction probe is connected with the thin-film thermocouple to monitor the temperature gradient on the surface of the sample in real time, and transmit the 3 temperatures on each side to the control system. If the temperature of the sample is within ±2°C of the specified temperature, the magnetic properties of the sample can be measured Yes, if the temperature deviation exceeds 5°C due to the heating of the sample or the unstable temperature of the heating system, the measurement will be terminated.

The beneficial effects of the utility model:

The Epstein square ring used in the magnetic measurement under the variable temperature state of the utility model overcomes the deviation of the measurement results caused by the destruction of the magnetic field distribution of the winding coil by the original technical scheme, and at the same time truly reflects the temperature gradient on the surface of the sample;

The utility model is used for the introduction of thin-film thermocouples in the Epstein square circle for magnetic measurement under variable temperature conditions. What is measured is the surface temperature of the sample surface, rather than the point temperature measured by common thermocouples, and the temperature measurement is more real and reliable; in addition, The temperature monitoring during the measurement process is realized through the temperature measurement and feedback program, and the measurement can be effectively controlled by judging the temperature distribution on the surface of the sample, so as to better meet the standard requirements.

The utility model is used in the Epstein square ring for magnetic measurement under variable temperature state. Three induction probes with r=1mm are introduced, and pass through the lower surface of the Epstein square ring winding frame. The upper end of each induction needle is fixed with a 20mm×20mm film thermocouple. The center point of the winding frame and the 70mm positions on the left and right sides are symmetrically distributed, and are consistent with the plane of the lower surface of the winding frame, which not only ensures that the magnetic field distribution of the winding coil is not affected during the measurement, but also can monitor the temperature gradient of the sample surface in real time.

Description of drawings

Fig. 1 is the perspective view of the Epstein square circle that the utility model is used for magnetic measurement under variable temperature state;

Fig. 2 is the plan view of the Epstein square circle that the utility model is used for magnetic measurement under variable temperature state;

Fig. 3 is the front view of the Epstein square ring used for magnetic measurement under variable temperature state of the present invention;

In the figure, Epstein square coil base 1, Epstein square coil winding skeleton 2, Epstein square coil winding coil 3, induction probe 4, thin film thermocouple 5.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can understand.

As shown in Figures 1 to 3, an Epstein square ring used for magnetic measurement under variable temperature conditions, the Epstein square ring includes an Epstein square ring base 1, and four Epstein square ring winding skeletons 2 are symmetrically arranged on the upper surface of the Epstein square ring base 1. , Epstein square coil winding skeleton 2 is a high temperature resistant synthetic material, and the length, width and height of the inner cavity are 220mm, 32mm and 10mm.

The Epstein square coil winding frame 2 is a square body, and the Epstein square coil winding frame 2 is wound with the Epstein square coil winding coil 3, and the Epstein square coil winding coil 3 is composed of primary coil winding and secondary coil winding alternately, and the primary coil The winding and secondary coil windings are high temperature resistant enamelled copper cores, the primary coil windings are double-strand high temperature resistant enamelled copper cores with φ=2.24mm, and the secondary coil windings are single strand high temperature resistant enamelled copper cores with φ=1.0mm core.

The two ends of the Epstein square coil winding frame 2 are open, and the four Epstein square coil winding frames 2 are connected end to end to form a square ring. The Epstein square coil base 1 directly below the Epstein square coil winding frame 2 is symmetrically arranged with three square thin film thermoelectric devices. Couple 5, wherein one thin-film thermocouple 5 is located below the Epstein square coil winding skeleton 2, and the other two thin-film thermocouples 5 are symmetrically arranged on both sides, and the length and width of the thin-film thermocouple 5 are 20mm×20mm; The edge of the winding frame is 10 mm, and the center of the upper surface of the thin-film thermocouple 5 is provided with an induction probe 4 with a radius r of 1 mm.

The action process of the Epstein square ring used for magnetic measurement under the variable temperature state:

1) Insert the sample in the Epstein square circle;

2) Put the Epstein square ring into the variable temperature environment box;

3) The variable temperature environment box is raised to the specified temperature, and the film thermocouple measures the temperature of the sample and feeds it back to the control system;

4) The control system instructs the equipment to measure according to the temperature gradient on the sample;

5) During the measurement process, the temperature of the sample is monitored and fed back in real time, and the measurement process is judged;

6) After the measurement is completed, the variable temperature environment box is cooled to room temperature;

7) Unload the sample from the Epstein square circle.

Other parts not specified in detail are prior art. Although the foregoing embodiments have described the utility model in detail, it is only a part of the embodiments of the utility model, rather than all embodiments, and people can also obtain other embodiments according to the present embodiment without inventive step, these The embodiments all belong to the protection scope of the utility model.

Claims (5)

1. a kind of Epstein square circle that is used for magnetic measurement under variable temperature state, it is characterized in that: described Epstein square circle comprises Epstein square circle base (1), and described Epstein square circle base (1) upper surface is arranged symmetrically in pairs Four Epstein square coil winding skeletons (2), the Epstein square coil winding skeletons (2) are cubes, and the Epstein square coil winding skeletons (2) are wound with Epstein square coil winding coils (3), the Epstein The two ends of the square ring winding skeleton (2) are open, and the opposite faces of four Epstein square winding skeletons (2) are connected end to end to form a square ring. A plurality of square thin-film thermocouples (5) are symmetrically arranged, and an induction probe (4) is arranged in the center of the upper surface of the thin-film thermocouple (5). 2. according to claim 1, be used for the Epstein square ring of magnetic measurement under variable temperature state, it is characterized in that: described Epstein square ring winding skeleton (2) is high temperature resistant synthetic material, and its inner chamber length, width, height are 220mm , 32mm and 10-20mm. 3. according to claim 1, the Epstein square coil for magnetic measurement under variable temperature state is characterized in that: said Epstein square coil winding coil (3) is made up of primary coil winding and secondary coil winding alternately winding, primary coil The winding and secondary coil windings are high temperature resistant enamelled copper cores, the primary coil winding is a double-strand high temperature resistant enamelled copper core with φ=2.24mm, and the secondary coil winding is a single strand high temperature resistant paint with φ=1.0mm Copper clad core. 4. the Epstein square ring that is used for magnetic measurement under variable temperature state according to claim 1, is characterized in that: described thin film thermocouple (5) is 3, and wherein a thin film thermocouple (5) is positioned at Epstein square ring winding skeleton (2) below, the other two thin-film thermocouples (5) are symmetrically arranged on both sides, and the length and width of the thin-film thermocouples (5) are 15-25 mm, and the distance between the thin-film thermocouples (5) on both sides of the Epstein square coil winding skeleton (2) The edge is 5-6mm. 5 . The Epstein square circle used for magnetic measurement under variable temperature state according to claim 1 , characterized in that: the radius r of the induction probe ( 4 ) is 0.5-2 mm.