Eductional geomagnetic field measurement experimental apparatus

Abstract

The magnetic field test experiment equipment for teaching field belongs to test technology field. It relates to test system, pedestal, bracket, the first pin, rotating cylinder, the first handle, rotary table, the second handle, bushing, motherboard, copper pole, the second pin, dial and hand. The test system is made up by sensor, exterior circuit and data display part. The two parts fix on the motherboard respectively by two copper poles, the four copper poles connects with rotary table, the second handle connects with it which connects with the second pin by bushing. The second pin tightly assorts to rotating cylinder, the latter connects to bracket through the first pin which tightly assorts to bracket. The hand and the first handle fix on the rotating cylinder, the dial stick to the left to bracket that sets on the pedestal vertically. Its magnetoresistance sensor is small and low cost with high sensitivity, resist-electromagnetism yawp, resist-disturb capability, and dependability and is suitable to the teaching experiment in high school and academy.

Description

technical field [0001] The invention relates to a device in the field of measurement technology, in particular to a geomagnetic field measurement experiment device for teaching. Background technique [0002] There is a geomagnetic field on the earth, and the geomagnetic field is a weak field. The average magnetic induction intensity on the ground is about 0.5 to 0.6 Gauss (that is, 0.5×10 -4 Tesla, 1 millitesla = 10 Gauss). The strength and direction of the geomagnetic field vary with different locations. As an important natural magnetic source, it has important uses in military affairs, industry, medicine, and prospecting. In the measurement of DC weak magnetic field, it is often necessary to know its value and try to eliminate its influence. Therefore, it is very necessary to develop a geomagnetic field measuring device with advanced principle, simple operation, high sensitivity and low price. As a teaching device, the device is used in sensors or physics experiments in...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing magnetic field measurement devices on the market, such as Gaussmeter, Teslameter and fluxmeter, etc., mostly use the Hall effect principle. Although the measurement range is large and it also has a display function, the sensitivity is low and the linearity Not good, it is more suitable for measuring stronger magnetic fields, and the error is larger when measuring weak magnetic fields like the earth's magnetic field

In addition, although this type of instrument has been made into a product, it is expensive and cannot measure the magnetic inclination, so it is not suitable for teaching and experimental equipment and research purposes in middle schools and colleges.

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