CN202352195U

CN202352195U - Oster experimental demonstrator

Info

Publication number: CN202352195U
Application number: CN2011203667305U
Authority: CN
Inventors: 王富民
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-26
Filing date: 2011-09-26
Publication date: 2012-07-25
Anticipated expiration: 2021-09-26

Abstract

The utility model relates to an Oster experimental demonstrator, which is characterized by comprising a capacitance charging and discharging device and a suspension type magnetic needle detection device; the capacitance charging and discharging device is in the form of a miniature transformer which is 5-10 W, 220 V in input and 16 V in secondary output; the charging process is displayed through light emission of a small bulb; the charging time is controlled through a switch K1; a 120-ohm resistor is connected to two ends of the small bulb in series and used for protecting the small bulb and for emergent service; two-voltage-multiplying rectification and large capacitance energy storage are adopted; an electronic switch made of a carbon rod or a high-power silicon controlled rectifier is used for instantaneously discharging; and an elongated and suspension type detection magnetic needle made of bar ferrite or neodymium iron boron magnetic body is adopted.

Description

Oersted experimental demonstration appearance

Technical field

The utility model relates to a kind of oersted experimental demonstration appearance, especially has the oersted experimental demonstration appearance of capacitor charge and discharge device and suspension type needle pick-up unit.

Background technology

At present, teach edition regular senior secondary school curricular standard experiment textbook physics to take as an elective course in the teaching in 3-1 (2010 April the 3rd edition) chapter 3 magnetic field, during explanation " magnetic effect of electric current " the people; Owing to lack the demonstration equipment; To ampere on the History of Physics and faraday's oersted that praise greatly, famous experiment (in April, 1820) much teachers touch on lightly, glance off, lack the excavation of teaching material and deeply probe into, the teacher who has downloads the animation courseware from the Internet when imparting knowledge to students; But the student still lacks the sense of reality of experiment; Carry out the oersted experiment and can make the student understand physical development, excite student's curiosity, Innovative Ability.

The utility model content

The utility model provides a kind of simple in structure, easy operating, the Physical Experiment teaching aid oersted experimental demonstration appearance that visibility is high.

The utility model solves the scheme that its technical matters adopted: oersted experimental demonstration appearance has capacitor charge and discharge device and suspension type needle pick-up unit; The miniature transformer of 5-10 watt of capacitor charge and discharge device employing, 220 volts of inputs, 16 volts of secondary outputs; The luminous demonstration charging process of " 3.8V, 0.3A " miniature bulb, K switch ₁In the control duration of charging, 120 Ohmages are connected in parallel on the miniature bulb two ends, in order to protection miniature bulb and emergent the use; Adopt 2 voltage multiplying rectifiers, big capacitance energy storage, the electronic switch instantaneous discharge of processing with carbon-point or high-power silicon controlled rectifier; In straight conductor, produce powerful electric current; Produce the enough magnetic field of detected certain intensity around making straight conductor, the strip, the suspension type that adopt bar shaped ferrite or neodymium iron boron magnetic body to process detect needle, and the suspension type needle has less moment of inertia; And can produce enough torsional moments, make the suspension type needle detect straight conductor in the moment of energising and produce magnetic field on every side.Bar shaped ferrite or neodymium iron boron magnetic body are adopted in the making of suspension type needle, and two identical shaped strip soft irons of magnetic pole two ends difference adhesive are then with aluminium foil or Copper Foil parcel; The aluminium foil or the Copper Foil of symmetry reserved at the two ends of suspension type needle; And stamp symmetrical aperture, two apertures link to each other with a fine rule, in order to the vertical fine rule of suspention; And the node of the vertical fine rule of suspention that can on the connection fine rule of two apertures, slide, to regulate suspension type needle level.

The beneficial effect of the utility model is: experimental apparatus compact overall structure, succinct, attractive in appearance occupies little space with low cost, easy operating; Experiment success rate is high, and experimental phenomena is directly perceived, and visibility is big; Strengthen student's perceptual knowledge; Can make the student think deeply and understand " electricity is got in touch with magnetic " better, excite student's curiosity and aspiration to knowledge, Innovative Ability.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the one-piece construction figure of oersted experimental demonstration appearance.

Fig. 2 is the circuit diagram of oersted experimental demonstration appearance electric capacity charging energy storage.

Fig. 3 is the cut-open view of oersted experimental demonstration appearance suspension type needle.

Fig. 4 is the electronic switching circuit figure of oersted experimental demonstration appearance capacitor discharge.

Among Fig. 1,101 control knob K for electric capacity charging energy storage ₁, 102 is the overhead support bracket of suspension type needle, 103 circuit boards for electric capacity charging energy storage, and 104 is the suspension type needle, 105 is the electronic switch control knob K of capacitor discharge ₂, 106 is the straight conductor of suspension type needle below, and 107 are carbon-point discharge handle, and 108 are the discharge carbon-point on the carbon-point discharge handle, and 109 is the discharge carbon-point on the straight conductor ends.

Among Fig. 2, K ₁Be the push type microswitch, A, B are respectively red, black binding post, resistance R power is more than 1 watt.

Among Fig. 3; 301 is the identical shaped strip soft iron of two magnetic pole two ends of bar-shaped magnet difference adhesive in the suspension type needle; 302 vertical fine rules for suspention suspension type needle; 305 is the two ends aluminium foil with holes or the Copper Foil that reserve, symmetry of suspension type needle, and 304 is bar-shaped magnet in the suspension type needle, and 303 is the fine rule that connects two apertures on the suspension type needle.

Among Fig. 4, the control element that mainly discharges is bidirectional triode thyristor BTA41700B, and terminal C connects binding post A, and terminal D connects the discharge carbon-point on the straight conductor ends, K ₂Be the push type microswitch, resistance R power is 1-2 watt.

Embodiment

It is the melamine facing fiberboard of 16MM that oersted experimental demonstration appearance bottom panel and facade plate adopt thickness, the long 38CM of bottom panel, wide 23CM, and the long 35CM of facade plate, wide 15CM, the facade plate is apart from bottom panel outer rim 20CM; The overhead support bracket of suspension type needle is that thickness 1MM, square section become 90 degree knuckles, right-angle side respectively to be the aluminum alloy frame section bar of 1CM; Long 44CM is converted into an angle of 90 degrees from mid point, and an end is got an aperture suspention suspension type needle; The other end flattens a section of 2CM length; Be plugged on the facade backboard face, the aluminum alloy sheet of the long 5CM of the useful screw fixings of facade backboard face coboundary, wide 3CM, thickness 1MM is reserved certain slit between aluminum alloy sheet and the facade plate; Straight conductor is selected 2.5 square millimeters red skin copper cash for use, and straight conductor is fixed on the bottom panel edge with wire clamp, and the discharge carbon-point is selected the carbon-point of No. 1 dry cell for use, and it is the pvc pipe of 1.6MM that carbon-point discharge handle is selected Φ for use, long 30CM; The long 20CM of circuit board, the wide 10CM of electric capacity charging energy storage press Fig. 2 and are connected each element with Fig. 4 circuit, and circuit board is fixed on the facade plate, K ₂Push type microswitch K ₁, K ₂Be fixed on facade plate coboundary correspondence position, the electronic switch of the discharge control element that mainly discharges is bidirectional triode thyristor BTA41700B, should add suitable heat radiator; Among Fig. 2, miniature bulb L is " 3.8V/0.3A ", C ₁, C ₂Be " 1000 μ F/25V ", C ₃, C ₄, C ₅, C ₆Be " 4700 μ F/50V ", D ₁, D ₂Be 1N4007, R is 120 ohm, 1 watt; Among Fig. 4, R is 1.2 kilohms, and 1 to 2 watt, C is " 0.18K/200V "; The suspension type needle of straight conductor top and the spacing 2MM of straight conductor.

Claims

1. oersted experimental demonstration appearance; It is characterized in that: oersted experimental demonstration appearance has capacitor charge and discharge device and suspension type needle pick-up unit; The miniature transformer of 5-10 watt of capacitor charge and discharge device employing, 220 volts of inputs, 16 volts of secondary outputs, the luminous demonstration charging process of miniature bulb, K switch ₁The control duration of charging; 120 Ohmages are connected in parallel on the miniature bulb two ends; In order to protection miniature bulb and emergent the use, adopt 2 voltage multiplying rectifiers, big capacitance energy storage; With the electronic switch instantaneous discharge that carbon-point or high-power silicon controlled rectifier are processed, the strip, the suspension type that adopt bar shaped ferrite or neodymium iron boron magnetic body to process detect needle.

2. oersted experimental demonstration appearance according to claim 1; It is characterized in that: bar shaped ferrite or neodymium iron boron magnetic body are adopted in the making of suspension type needle, and two identical shaped strip soft irons of magnetic pole two ends difference adhesive are then with aluminium foil or Copper Foil parcel; The aluminium foil or the Copper Foil of symmetry reserved at the two ends of suspension type needle; And stamp symmetrical aperture, two apertures link to each other with a fine rule, in order to the vertical fine rule of suspention; And the node of the vertical fine rule of suspention that can on the connection fine rule of two apertures, slide, to regulate suspension type needle level.

3. oersted experimental demonstration appearance according to claim 1; It is characterized in that: it is the melamine facing fiberboard of 16MM that oersted experimental demonstration appearance bottom panel and facade plate adopt thickness; The long 38CM of bottom panel, wide 23CM, the long 35CM of facade plate, wide 15CM, the facade plate is apart from bottom panel outer rim 20CM.

4. oersted experimental demonstration appearance according to claim 1 is characterized in that: the electronic switch of the capacitor discharge control element that mainly discharges is bidirectional triode thyristor BTA41700B, and adds suitable heat radiator, the control knob K of electric capacity charging energy storage ₁, capacitor discharge electronic switch control knob K ₂Select the push type microswitch for use, be fixed on facade plate coboundary correspondence position.

5. oersted experimental demonstration appearance according to claim 1; It is characterized in that: the overhead support bracket of suspension type needle is that thickness 1MM, square section become 90 degree knuckles, right-angle side respectively to be the aluminum alloy frame section bar of 1CM; Long 44CM is converted into an angle of 90 degrees from mid point, and an end is got an aperture suspention suspension type needle; The other end flattens a section of 2CM length; Be plugged on the facade backboard face, the aluminum alloy sheet of the long 5CM of the useful screw fixings of facade backboard face coboundary, wide 3CM, thickness 1MM is reserved certain slit between aluminum alloy sheet and the facade plate; Straight conductor is selected 2.5 square millimeters red skin copper cash for use, and straight conductor is fixed on the bottom panel edge with wire clamp; The suspension type needle of straight conductor top and the spacing 2MM of straight conductor.