Faraday effect tester with gauss meter

Abstract

The utility model discloses a Faraday effect tester with a gauss meter, which comprises a gauss meter box body and an electric box, the gauss meter box body is provided with a support corner, the support corner is provided with a monochromator, the monochromator is provided with an exit slit and an entrance slit, the entrance slit is provided with an entrance slit hand wheel, and the entrance slit hand wheel is provided with an entrance slit. The entrance slit is provided with a first connecting cylinder, and the first connecting cylinder is connected with a light source. The utility model relates to the technical field of farther effect testers of gauss meters. The calibration of the electromagnetic induction intensity of the electromagnet magnetic field is facilitated, students can learn the calibration method of the electromagnetic induction intensity of the electromagnet, the accuracy of experimental data is ensured, and different samples can be installed on the sample support for measurement.

Description

A Faraday effect testing instrument with a Gauss meter Technical Field

[0001] This utility model relates to the technical field of Faraday effect testing instruments, specifically a Faraday effect testing instrument with a gaussmeter. Background Technology

[0002] Some universities currently use experimental instruments that do not have gaussmeters. They determine the current value based on the magnetic intensity curve provided by the manufacturer when the instrument is manufactured, which is not very convenient for experiments. If recalibration is required, a gaussmeter must be ordered to measure the magnetic field strength, and it can only be used to measure one type of sample. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a Faraday effect tester with a gaussmeter, which solves the problem that some existing experimental instruments used in universities do not have a gaussmeter and rely on the magnetic intensity curve provided by the manufacturer to determine the current value, making the experiment inconvenient.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: It includes a gaussmeter housing and an electrical box. A support is installed on the gaussmeter housing, and a monochromator is installed on the support. The monochromator has an exit slit and an entrance slit. An entrance slit handwheel is provided on the entrance slit. A first connecting cylinder is installed on the entrance slit and connected to a light source. A second connecting cylinder is connected to the exit slit. A fixing frame is installed on the second connecting cylinder. A first polarizing seat is installed on the fixing frame. A first polarizer plate is installed inside the first polarizing seat. A pressure ring for pressing the first polarizer plate is provided on the first polarizing seat. A limiting seat is installed inside the first polarizer plate. One end of the limiting seat is connected to a first magnetic yoke, and a supporting beam is installed on the first magnetic yoke.

[0005] Preferably, a fixing plate is installed inside the electrical box, a photoelectric receiving dark box is fixed to one side of the fixing plate, a photoelectric receiving tube is installed on the photoelectric receiving dark box, a light shield is installed on the fixing plate by fixing nails, a worm gear bracket is installed on the fixing plate, a worm gear is installed on the worm gear bracket, the rotation of the worm gear drives the turbine to rotate, a second polarizer seat is installed on the turbine, a second polarizer plate is installed in the second polarizer seat, the second polarizer seat is connected to an encoder by a locking ring, and an encoder connecting bracket is connected to the encoder, a through hole is opened on the side wall of the electrical box, the encoder is positioned corresponding to the through hole, a connecting sleeve is connected to the side wall of the electrical box by a second fixing nail, a second magnetic yoke is installed on the connecting sleeve, and the second magnetic yoke is connected to the supporting crossbeam.

[0006] Preferably, poles are installed at both ends of the first and second magnetic yokes, and coils are connected to the poles. Electromagnet power supply plugs are fixed on the first and second magnetic yokes, and DC power supply plugs are provided on the electromagnet power supply plugs. A sample holder with a groove is placed between the two poles, and support beams are installed on both sides of the first and second magnetic yokes.

[0007] Preferably, a gaussmeter plug is installed on the gaussmeter housing, and a gaussmeter probe is connected to the gaussmeter plug via a data cable.

[0008] Preferably, a second foot is installed on the support beam on the first and second magnetic yokes.

[0009] Preferably, a wavelength handwheel is installed on the monochromator, and a rotating handle connected to the first polarizer plate is installed on the first polarizer plate.

[0010] This invention provides a Faraday effect tester with a gaussmeter. It offers the following advantages: it facilitates the calibration of the electromagnetic induction intensity of an electromagnet's magnetic field, allowing students to learn the calibration method for electromagnet electromagnetic induction intensity, while also ensuring the accuracy of experimental data. Furthermore, the sample holder can accommodate different samples for measurement. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the structure of the Faraday effect tester with a gaussmeter described in this utility model.

[0012] Figure 2 is a side view of the gaussmeter housing of the Faraday effect tester with gaussmeter described in this utility model.

[0013] Figure 3 is a side view of the first magnetic yoke of the Faraday effect tester with a gaussmeter described in this utility model.

[0014] Figure 4 is a side view of the sample holder of the Faraday effect tester with a gaussmeter described in this utility model.

[0015] Figure 5 is a front view of the sample holder of the Faraday effect tester with a gaussmeter described in this utility model.

[0016] Figure 6 is a schematic diagram of a purchased DC regulated power supply for a Faraday effect tester with a gaussmeter described in this utility model.

[0017] In the diagram: 1-Gaussmeter housing; 2-Electrical box; 3-Support; 4-Monochromator; 5-Exit slit; 6-Inlet slit; 7-Inlet slit adjusting handwheel; 8-First connecting cylinder; 9-Light source; 10-Second connecting cylinder; 11-First polarizer plate; 12-First polarizer seat; 13-Fixing frame; 14-Pressure ring; 15-Limiting seat; 16-First magnetic yoke; 17-Fixing plate; 18-Photoelectric receiving dark box; 19-Photoelectric receiving tube; 20-Light shield; 21-Worm support; 22-Worm; 23-Vortex 24-Second polarizer holder; 25-Second polarizer; 26-Locking ring; 27-Encoder; 28-Second fixing pin; 29-Wavelength handwheel; 30-Second magnetic yoke; 31-Connecting sleeve; 32-Pole head; 33-Coil; 34-Electromagnet power supply plug; 35-DC power supply connection hole; 36-Sample holder; 37-Gaussmeter plug; 38-Gaussmeter probe; 39-Second foot; 40-Rotation handle; 41-Encoder connection bracket; 42-Support beam; 43-Signal zeroing handwheel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please refer to Figures 1-6. This utility model provides a technical solution: a Faraday effect tester with a gaussmeter, including a gaussmeter housing 1 and an electrical box 2. A support 3 is installed on the gaussmeter housing 1, and a monochromator 4 is installed on the support 3. The monochromator 4 is provided with an exit slit 5 and an entrance slit 6. An entrance slit handwheel 7 is provided on the entrance slit 6. A first connecting cylinder 8 is installed on the entrance slit 6 and is connected to a light source 9. A second connecting cylinder 10 is connected to the exit slit 5. A fixing frame 13 is installed on the second connecting cylinder 10. A first polarizing seat 12 is installed on the fixing frame 13. A first polarizer plate 11 is installed inside the first polarizing seat 12. A pressure ring 14 for pressing the first polarizer plate 11 is provided on the first polarizing seat 12. A limiting seat 15 is installed inside the first polarizer plate 11. A first magnetic yoke 16 is connected to one end of the limiting seat 15. A supporting beam 42 is installed on the first magnetic yoke 16.

[0020] As a preferred technical solution, further, a fixing plate 17 is installed inside the electrical box 2. A photoelectric receiving dark box 18 is fixed to one side of the fixing plate 17. A photoelectric receiving tube 19 is installed on the photoelectric receiving dark box 18. A light shield 20 is installed on the fixing plate 17 by fixing nails. A worm gear bracket 21 is installed on the fixing plate 17. A worm gear 22 is installed on the worm gear bracket 21. The rotation of the worm gear 22 drives the turbine 23 to rotate. A second polarizer seat 24 is installed on the turbine 23. A second polarizer 25 is installed inside the second polarizer seat 24. An encoder 27 is connected to the second polarizer seat 24 by a locking ring 26. An encoder connecting bracket 41 is connected to the encoder. A through hole is opened on the side wall of the electrical box 2. The encoder 27 is positioned corresponding to the through hole. A connecting sleeve 31 is connected to the side wall of the electrical box by a second fixing nail 28. A second magnetic yoke 30 is installed on the connecting sleeve 31. The second magnetic yoke 30 is connected to the supporting beam 42.

[0021] As a preferred technical solution, further, pole heads 32 are installed at both ends of the first magnetic yoke 16 and the second magnetic yoke 30, and coils 33 are connected to the pole heads 32. Electromagnetic power supply plugs 34 are fixed on the first magnetic yoke 16 and the second magnetic yoke 30. The electromagnet power supply plugs 34 are provided with DC power connection holes 35. A sample holder 36 with a groove is placed between the two pole heads 32. Support beams 42 are installed on both sides of the first magnetic yoke 16 and the second magnetic yoke 30.

[0022] As a preferred technical solution, a gaussmeter plug 37 is further installed on the gaussmeter housing 1, and the gaussmeter probe 38 is connected to the gaussmeter plug 37 via a data cable.

[0023] As a preferred technical solution, a second foot 39 is further installed on the support beam 42 on the first magnetic yoke 16 and the second magnetic yoke 30.

[0024] As a preferred technical solution, a wavelength handwheel 29 is installed on the monochromator 4, and a rotating handle 40 connected to the first polarizer plate 12 is installed on the first polarizer plate 11.

[0025] Specifically, it should be explained as follows:

[0026] Light source 9 emits light, which passes through connecting tube 8 to the entrance slit 6 of the monochromator. The size of the slit is adjusted by the entrance slit adjustment handwheel 7 to determine the intensity of the incident light. After being dispersed by the monochromator, the incident light exits through the exit slit 5 and passes through the first polarizer 11. The spectral positions after dispersion by the monochromator are provided with a spectral line table, and the desired wavelength position can be achieved by rotating the wavelength handwheel 29. The width of the entrance slit is determined by the scale on the entrance slit adjustment handwheel 7.

[0027] The first magnetic yoke 16, the second magnetic yoke 30, the coil 33, and the two poles 32 form an electromagnet. When current is applied through an externally purchased DC regulated power supply, a magnetic field is generated. The larger the current, the stronger the magnetic field. There are light-transmitting holes in the middle of the two magnetic yokes and the two poles.

[0028] The gaussmeter probe 38 on the gaussmeter housing 1 is installed in the groove of the sample holder 36 and placed between the two poles 32 to measure the magnetic field strength after the electromagnet is connected to the current. The larger the current, the stronger the magnetic field.

[0029] Inside the electrical box 2, the encoder bracket 41 and the fixing plate 17 are both connected to the bottom plate of the electrical box. The second polarizer seat 24 and the second polarizer 25 are installed on the worm gear 23. The second polarizer seat (24) and the hollow shaft of the encoder 27 are connected by the locking ring 26. The photoelectric receiving dark box 18 is installed on the fixing plate 17. The photoelectric receiving tube 19 is installed on the photoelectric receiving dark box 18. The worm bracket 21 is installed on the fixing plate 17. The worm 22 is installed on the worm bracket 21. The rotation of the worm 22 drives the rotation of the worm gear 23, which in turn drives the rotation of the second polarizer 25 and the hollow shaft of the encoder 27. The encoder 27 realizes the numerical change of the angle of the electrical box meter, and the photoelectric receiving tube 19 realizes the change of the signal strength.

[0030] A DC regulated power supply is used to provide power to an electromagnet, thereby causing a change in the magnetic field strength of the electromagnet.

[0031] The following points need to be noted in the instrumental experiment:

[0032] 1. Place the instrument on a stable experimental platform and position it as shown in the diagram. Using the light output hole of the monochromator as a reference, adjust the lifting adjustment knob of the electromagnet and adjust the foot adjustment handwheel under the electrical box 2 to make the electrical box 2 and the light output hole of the electromagnet coaxial.

[0033] 2. Connect the power supply to the electrical box and the DC regulated power supply. When turning on the instrument, set the voltage and current knobs to zero and turn on all wires. Turn on the light source switch and keep the power and light source running for more than 10 minutes. Adjust the entrance slit handwheel 7 to open the entrance slit by about 0.05 mm. Adjust the wavelength handwheel 29 of the monochromator 4 to a wavelength of 546.1 nm. A clear image of the exit slit can be seen visually on one side of the electromagnet. At this point, install the electrical box and move it to find the strongest value. The instrument is now adjusted.

[0034] 3. Adjusting the gaussmeter reading: Connect the gaussmeter probe 38 to the gaussmeter plug 37. The gaussmeter is factory calibrated. Place the gaussmeter probe 38 in a non-magnetic field space. When the button is in the calibration state, make sure it matches the marked value. If it does not match, use a flathead screwdriver to adjust it. When the button is in the zeroing state, the reading will show zero. If it is not zero, use a flathead screwdriver to adjust it to zero. At this time, the gaussmeter adjustment is complete.

[0035] 4. Install the gaussmeter probe 38 on the sample holder 36, place the sample holder 36 on the electromagnet yoke, align the gaussmeter probe 38 with the electromagnet pole 32, determine the position (refer to the position of the copper nail), connect the electromagnet to the DC regulated power supply with a wire, magnetize the electromagnet, adjust the DC regulated power supply, adjust the current directly to 5A and then return to 0.

[0036] 5. Determine the relationship between current and magnetic field: Adjust the current of the DC regulated power supply and observe the change in the Gaussian count value. When the magnetic field strength reaches 2000 GS, record the current value at this time. Record the current values ​​at 4000 GS, 6000 GS, 8000 GS, and 10000 GS sequentially. Ideally, use the average current value from multiple magnetic field strength measurements as the current adjustment data. It is best to magnetize the device before each experiment and determine the average current value for each magnetic field strength to ensure data accuracy. After calculating the current data, record the corresponding current data at 2000, 4000, 6000, 8000, and 10000 GS to prepare for subsequent experiments.

[0037] 6. Remove the Hall probe and install the sample. Place the sample between the two pole heads 32, keeping the optical path unchanged. Rotate the worm gear 22 and observe the change in the light intensity display value. Adjust the worm gear 22 to rotate in the direction where the light intensity display value decreases. When the light intensity display value reaches a certain minimum value, continue rotating the worm gear. The light intensity display value will begin to increase. Use the zeroing button to zero the angle at the position where the light intensity display value is the minimum. Then rotate the worm gear 2 to rotate the polarizer 2 to ±40 to 45° (this position is a relatively ideal Faraday experiment position. When rotated to the positive angle position, the light intensity value will increase when the electromagnet is loaded with current; when rotated to the negative angle, the light intensity value will decrease when the electromagnet is loaded with current). Use the angle zeroing button on the electrical box to zero the angle. Adjust the signal zeroing handwheel 43 on the electrical box to adjust the light intensity display to a certain fixed value. Ideally, the value should be within 80. If the value is large, you can adjust the entrance slit adjustment handwheel 7 or the zeroing handwheel 43 of the electrical box signal. If the value is too large, you can adjust the dark potentiometer on the back of the electrical box (the instrument is pre-adjusted at the factory, so try not to adjust it).

[0038] 7. Adjust the DC regulated power supply so that the output current slowly reaches the magnetic field current value of 2000GS. When the current changes, the light intensity display will also change accordingly. Observe the light intensity value, then adjust the current back to "0" and check if the light intensity display is a fixed and stable value. Repeat the above steps until the digital display value is stable. (The value should ideally not exceed 80; the smaller the value, the more stable it is. This can be controlled by the size of the entrance slit.) After applying a 2000GS current to the electromagnet, slowly adjust the worm gear 22 so that the light intensity display value gradually returns to the value before the current was applied. At this time, the value displayed on the angle meter is the deflection angle of the light-transmitting medium under the magnetic field of 2000GS current.

[0039] 9. Adjust the output of the DC regulated power supply to the magnetic field current value of 4000GS, and slowly adjust the angle handwheel so that the light intensity display value gradually returns to the value before the current is applied. At this time, the value displayed on the angle meter is the deflection angle of the light-transmitting medium under the magnetic field of 4000GS current.

[0040] 10. By repeating the above method, the deflection angle of the light-transmitting medium under current magnetic fields of 6000GS, 8000GS, and 10000GS can be measured (or a measurement can be performed every 1000GS, and multiple measurements can be taken under the same current to take the average value to reduce experimental error).

[0041] The deflection angle α is calculated for every 2000GS increase using the successive difference method. Substituting the value into the formula α=VBD, V is calculated, where B is the magnetic field strength and D is the thickness of the medium sample.

[0042] The V value can be measured and calculated again based on different wavelengths.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A Faraday effect testing instrument with a gaussmeter, comprising a gaussmeter housing (1) and an electrical box (2), wherein a support (3) is mounted on the gaussmeter housing (1), a monochromator (4) is mounted on the support (3), the monochromator (4) is provided with an exit slit (5) and an entrance slit (6), an entrance slit handwheel (7) is provided on the entrance slit (6), and a first connecting cylinder (8) is mounted on the entrance slit (6), the first connecting cylinder (8) being connected to a light source (9), characterized in that, The exit slit (5) is connected to a second connecting cylinder (10), and a fixing frame (13) is installed on the second connecting cylinder (10). A first polarizing seat (12) is installed on the fixing frame (13), and a first polarizer plate (11) is installed inside the first polarizing seat (12). A pressure ring (14) for pressing the first polarizer plate (11) is provided on the first polarizing seat (12). A limiting seat (15) is installed inside the first polarizer plate (11). A first magnetic yoke (16) is connected to one end of the limiting seat (15), and a supporting beam (42) is installed on the first magnetic yoke (16).

2. The Faraday effect tester with a Gauss meter according to claim 1, characterized in that, A fixing plate (17) is installed inside the electrical box (2). A photoelectric receiving dark box (18) is fixed on one side of the fixing plate (17). A photoelectric receiving tube (19) is installed on the photoelectric receiving dark box (18). A light shield (20) is installed on the fixing plate (17) by fixing nails. A worm gear bracket (21) is installed on the fixing plate (17). A worm gear (22) is installed on the worm gear bracket (21). The rotation of the worm gear (22) drives the turbine (23) to rotate. A second polarizer seat (24) is installed on the turbine (23). The second polarizer holder (24) is equipped with a second polarizer (25). The second polarizer holder (24) is connected to an encoder (27) via a locking ring (26). The encoder is connected to an encoder connecting bracket (41). The side wall of the electrical box (2) has a through hole. The encoder (27) is positioned corresponding to the through hole. The side wall of the electrical box is connected to a connecting sleeve (31) via a second fixing nail (28). A second magnetic yoke (30) is installed on the connecting sleeve (31). The second magnetic yoke (30) is connected to the supporting beam (42).

3. The Faraday effect testing instrument with a gaussmeter according to claim 2, characterized in that, The first magnetic yoke (16) and the second magnetic yoke (30) are equipped with pole heads (32) at both ends. A coil (33) is connected to the pole head (32). An electromagnet power supply plug (34) is fixed on the first magnetic yoke (16) and the second magnetic yoke (30). The electromagnet power supply plug (34) is provided with a DC power supply connection hole (35). A sample holder (36) with a groove is placed between the two pole heads (32). Support beams (42) are installed on both sides of the first magnetic yoke (16) and the second magnetic yoke (30).

4. The Faraday effect testing instrument with a gaussmeter according to claim 1, characterized in that, The gaussmeter housing (1) is fitted with a gaussmeter plug (37), and the gaussmeter plug (37) is connected to the gaussmeter probe (38) via a data cable.

5. The Faraday effect tester with a Gauss meter according to claim 1, characterized in that, The first magnetic yoke (16) and the second magnetic yoke (30) are equipped with second feet (39) on the support beam (42).

6. The Faraday effect testing instrument with a gaussmeter according to claim 1, characterized in that, The monochromator (4) is equipped with a wavelength handwheel (29), and the first polarizer plate (11) is equipped with a rotating handle (40) connected to the first polarizer seat (12).

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