CN112767800A - Multifunctional electricity experiment instrument - Google Patents

Multifunctional electricity experiment instrument Download PDF

Info

Publication number
CN112767800A
CN112767800A CN202110197107.XA CN202110197107A CN112767800A CN 112767800 A CN112767800 A CN 112767800A CN 202110197107 A CN202110197107 A CN 202110197107A CN 112767800 A CN112767800 A CN 112767800A
Authority
CN
China
Prior art keywords
switch
ammeter
resistance
terminal
diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110197107.XA
Other languages
Chinese (zh)
Inventor
冯中营
武晓恺
郭泽凯
卫贺贺
杨莹
柴立臣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan Institute of Technology
Original Assignee
Taiyuan Institute of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan Institute of Technology filed Critical Taiyuan Institute of Technology
Priority to CN202110197107.XA priority Critical patent/CN112767800A/en
Publication of CN112767800A publication Critical patent/CN112767800A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
    • G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
    • G09B23/187—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for measuring instruments

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Algebra (AREA)
  • Pure & Applied Mathematics (AREA)
  • Educational Administration (AREA)
  • Computational Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

The invention discloses a multifunctional electricity experimental instrument which comprises a cuboid frame, wherein a first functional area switch, a first oscillography binding post, a second oscillography binding post, a third oscillography binding post, a capacitance control switch, an inductance control switch, a second functional area switch, a first resistance binding post to be measured, a second resistance binding post to be measured, a first ammeter and a regulating resistor R are embedded on the side surface of the cuboid frame1A fixed resistor R2Adjusting the resistance RSThe device comprises a third functional area switch, a voltmeter selection switch, a diode selection switch, a second ammeter, a voltmeter, a regulating resistor, a forward diode, a backward diode and an ammeter switch; the side inner wall of the cuboid frame is provided with a 9V battery and a connecting circuit board, and the connecting circuit board and the 9V battery bin are located on the same inner side wall. The original complex experiment operation is simplified and convenient, the three experiments can be well demonstrated, the assembly time is saved, and the device has good practicability and is worth popularizing.

Description

Multifunctional electricity experiment instrument
Technical Field
The invention belongs to the technical field of electrical test instruments, and particularly relates to a multifunctional electrical test instrument.
Background
Electricity is a branch subject of physics, an electricity design experiment subject can effectively examine experimental skills and creative thinking ability of students, three experiments of 'transient process of RLC series circuit', 'measuring volt-ampere characteristic of nonlinear element', 'measuring resistance by using direct current single-arm bridge' are widely taught in many colleges, but the experiment operation process is complicated, and more experimental instruments are involved, so that the experiment is not beneficial to the operation of students.
Disclosure of Invention
Aiming at the existing problems, the experimental device is optimally designed, so that the improved tester is simple and convenient, and the three experimental operations can be met.
The technical scheme adopted by the invention is as follows:
the utility model provides a multi-functional electricity experiment appearance, its characterized in that, includes the cuboid frame of constituteing by transparent plastic board that can assemble, it is equipped with first function area switch, first oscillography terminal, second oscillography terminal, third oscillography terminal, capacitance control switch, inductance control switch, second function area switch to inlay on the side of cuboid frame, first resistance terminal, the second resistance terminal that awaits measuring, first ampere meter, adjusting resistance R that awaits measuring1A fixed resistor R2Adjusting the resistance RSA third functional area switch, a voltmeter selection switch, a diode selection switch, a second ammeter, a voltmeter and a regulating resistor R3A forward diode, a backward diode, an ammeter switch; a 9V battery bin is arranged at the bottom in the rectangular frame; be provided with 9V battery and connecting circuit board on cuboid frame's the side inner wall, connecting circuit board and 9V battery storehouse are located same inside wall, and the fixed required electric capacity and the inductance of RLC functional area that is connected with on it for realize the connection between first oscillography terminal, second oscillography terminal, third oscillography terminal, capacitance control switch, inductance control switch, electric capacity, the inductance.
Preferably, the cuboid frame is formed by sequentially splicing and connecting six transparent plastic plates, the end part of each transparent plastic plate is provided with a tooth-shaped clamping groove respectively, and the adjacent two transparent plastic plates are spliced and connected through the tooth-shaped clamping grooves at the end parts.
Preferably, the first function area switch, the first oscillography terminal, the second oscillography terminal, the third oscillography terminal, the capacitance control switch, the inductance control switch, the second function area switch, the first resistance terminal to be tested, the second resistance terminal to be tested, the first ammeter and the adjusting resistor R1Adjusting the resistance RSAll embedded in the upper plate surface of the cuboid frame, and the fixed resistor R2The inner surface of the upper plate surface is pasted inside the cuboid frame;
the first function area switch, the first oscillography binding post, the second oscillography binding post, the third oscillography binding post, the capacitance control switch and the inductance control switch are all positioned in the RLC function area; the first function area switch is connected with a capacitor and an inductor on a connecting circuit board in series in sequence, two ends of the capacitor and the inductor are respectively connected with a lead out wire and a capacitor control switch and an inductor control switch, the lead out wire at one end of the electric principle inductor is connected with a first wiring terminal, the lead out wire between the capacitor and the inductor is connected with a second wiring terminal, and the lead out wire at one end of the inductor principle capacitor is connected with a third wiring terminal;
second function area switch, first resistance terminal to be tested, second resistance terminal to be tested, first ammeter and adjusting resistor R1A fixed resistor R2Adjusting the resistance RSThe single-arm current bridge resistance measurement functional area; the adjusting resistor RSAnd a second function area switch and a built-in fixed resistor R2Are sequentially connected in series between the positive electrode and the negative electrode on the power supply bin; the adjusting resistor R1Is connected to the fixed resistor R2Remote control resistor RSThe other end of the first ammeter is connected with a lead of the first ammeter on a first to-be-detected resistance binding post; the other lead of the first ammeter is connected with a fixed resistor R2And adjusting the resistance RSIn the meantime.
Preferably, theA third functional area switch, a voltmeter selection switch, a diode selection switch, a second ammeter, a voltmeter and a regulating resistor R3The forward diode and the backward diode are embedded in the front plate surface of the cuboid frame;
wherein the adjusting resistor R3The second ammeter and the diode selection switch are connected in series in sequence; a lead wire '1' of the diode selection switch is connected with the anode of the forward diode, and a lead wire '0' of the diode selection switch is connected with the cathode of the reverse diode; the negative pole of the forward diode and the positive pole of the reverse diode are connected to the third functional area switch and connected to the regulating resistor R3The second ammeter and the diode selection switch are connected in series in the positive and negative electrodes of the circuit; the negative pole of the voltmeter is connected with one end of the third functional area switch, which is far away from the power supply, and the positive pole of the voltmeter is connected with the voltmeter selection switch; the lead wire '1' of the voltmeter selection switch is connected with one end, close to the forward diode, of the ammeter, and the lead wire '0' of the voltmeter selection switch is connected with one end, far away from the reverse diode, of the ammeter.
Preferably, the ammeter switch is embedded in the left plate surface of the cuboid frame and used for controlling the power supply and disconnection of the first ammeter independently supplying power.
Preferably, a negative terminal and a positive terminal are arranged on the 9V battery cabin, the negative terminal is connected with a negative electrode of a power supply, and the positive terminal is connected with a positive electrode of the power supply.
The invention has the beneficial effects that:
the multifunctional electrical experiment instrument can realize that one tester can meet the requirement of' RLC series circuit
The three experiments of transient process, measurement of volt-ampere characteristic of the nonlinear element and measurement of resistance by using the direct current single-arm bridge simplify and facilitate original complex experiment operation, can well demonstrate the three experiments, saves assembly time, has good practicability and is worthy of popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a current schematic of the present invention for measuring the current-voltage characteristic of a nonlinear element;
FIG. 2 is a schematic circuit diagram of a DC single-arm bridge resistor tester according to the present invention;
FIG. 3 is a circuit schematic of the transient characteristics of the RLC circuit in the present invention;
FIG. 4 is a front view of the multifunctional electrical experiment apparatus of the present invention;
FIG. 5 is a top view of the multifunctional electrical experiment apparatus of the present invention;
FIG. 6 is a left side view of the multifunctional electrical experiment apparatus of the present invention;
FIG. 7 is a schematic view of the structure of the transparent plastic plate according to the present invention;
FIG. 8 is a data validation of the forward characteristic of the current-voltage characteristic of the measured nonlinear element;
FIG. 9 is a data validation of measuring the inverse of the current-voltage characteristic of a nonlinear element;
FIG. 10 is a graph of experimental data for single arm bridge resistance measurements;
FIG. 11 is RL image information during a transient state of an RLC series circuit in accordance with the present invention;
FIG. 12 is RC image information during a transient state of the RLC series circuit of the present invention;
fig. 13 shows RLC image information during a transient state of the RLC series circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Principle of design
Measuring the current-voltage characteristic of a non-linear element
The main use of voltammetry is to measure and study the characteristics of nonlinear elements. Some sensors exhibit a regular change in their voltammetric characteristics with changes in the physical quantity, and therefore when the sensor is analyzed for its voltammetric characteristics, it is often necessary to measure them.
According to ohm's law R ═ U/I
The element R to be tested can be obtained by calculating the indicating values U and I of the voltmeter and the ammeterXThe resistance value of (c). There are two ways to represent the resistance of a nonlinear element, one is called the static resistance (or DC resistance) and R is usedDRepresents; the other is called dynamic resistance (or micro-variable resistance) and r is usedDIndicating that it is equal to the ratio of the amount of change in voltage to the amount of change in current near the operating point. The dynamic resistance can be obtained by voltammetry, and the static resistance R of the point Q in FIG. 1D＝UQ/IQDynamic resistance rDIs composed of
Figure BDA0002947346740000051
When measuring volt-ampere characteristics, the connection mode of ammeter has two: the ammeter is connected with the inside of the ammeter and connected with the outside of the ammeter. Both connections cause certain systematic errors due to the influence of the current internal resistance. Usually, a proper electric meter connection mode is selected according to the resistance value of the element to be measured and the internal resistance of the electric meter so as to reduce the influence of the access error. When measuring small resistance, an ammeter is externally connected; the side-measuring resistor is often connected with an ammeter. The known ammeter and voltmeter have internal resistances of RAAnd RVFor the measured resistance RxAnd (6) correcting.
When the ammeter is connected in the internal circuit,
Figure BDA0002947346740000061
when the ammeter is connected with the external circuit,
Figure BDA0002947346740000062
measuring resistance by using direct current single-arm bridge
The single-arm DC resistor is also called Wheatstone bridge, R in FIG. 21,R2Is a fixed resistance, RSFor adjustable resistors, they are connected to the resistor R to be measuredXConnected into a quadrangle. Each side is called one arm of the bridge and a power supply E is connected between the opposite corners a and C. The connection is bridged between opposite corners B and D with galvanometer P. If regulating RSAnd (4) when the potentials of the point B and the point D are equal, no current passes through the galvanometer P, and the bridge is in a balanced state. At this time have
I1R1＝I2R2
I1RX＝I2RS
Two-phase division to obtain RX＝(R1/R2)RS
Commonly referred to as RxIs an arm to be measured; r1And R2Is a proportional arm, ratio R1/R2Is called magnification and RSThe value of (3) can be used for calculating the resistance to be measured.
Transient characteristics of RLC series circuit
Under the action of the step voltage, the RLC series circuit jumps from one equilibrium state to another equilibrium state, and the transition process is called a transient process. The transient characteristics of the RLC circuit are very important in practical operation, for example, the switching characteristics of elements and the charging and discharging problems of capacitors are often encountered in a pulse circuit; transient characteristics are often used in electronics to improve the waveform or to generate a specific waveform. Transient characteristics can also be harmful, for example, at the moment of switching on and off the power supply, the transient characteristics can cause excessive current and voltage in the circuit, and damage to components and equipment can be caused. Therefore, it is very important to study the variation rule of voltage and current in the transient process. The schematic circuit diagram is shown in fig. 3.
Based on the principle analysis of the physical and electrical experiment, the invention specifically designs a multifunctional electrical experiment instrument which comprises an assembled cuboid frame composed of transparent plastic plates, as shown in fig. 7, the cuboid frame is formed by sequentially splicing and connecting six transparent plastic plates, the end part of each transparent plastic plate is respectively provided with a tooth-shaped clamping groove, and two adjacent transparent plastic plates are spliced and connected through the tooth-shaped clamping grooves at the end parts.
As shown in fig. 4-6, specifically, the cuboid frame is embedded with a first functional area switch, a first oscillography binding post, a second oscillography binding post, a third oscillography binding post, a capacitance control switch, an inductance control switch, a second functional area switch, a first resistance binding post to be tested, a second resistance binding post to be tested, a first ammeter and a regulating resistor R on the side surface thereof1A fixed resistor R2Adjusting the resistance RSThe device comprises a third functional area switch, a voltmeter selection switch, a diode selection switch, a second ammeter, a voltmeter, a regulating resistor, a forward diode, a backward diode and an ammeter switch; a 9V battery bin is arranged at the bottom in the cuboid frame and used for supplying power to an ammeter screen and normally displaying a current signal; be provided with 9V battery and connecting circuit board on cuboid frame's the side inner wall, connecting circuit board and 9V battery storehouse are located same inside wall, and the fixed required electric capacity and the inductance of RLC functional area that is connected with on it for realize the connection between first oscillography terminal, second oscillography terminal, third oscillography terminal, capacitance control switch, inductance control switch, electric capacity, the inductance.
Specifically, the first function area switch, the first oscillography terminal, the second oscillography terminal, the third oscillography terminal, the capacitance control switch, the inductance control switch, the second function area switch, the first resistance terminal to be tested, the second resistance terminal to be tested, the first ammeter and the adjusting resistor R1Adjusting the resistance RSAll embedded in the upper plate surface of the cuboid frame, and the fixed resistor R2The inner surface of the upper plate surface is pasted inside the cuboid frame;
the first function area switch, the first oscillography binding post, the second oscillography binding post, the third oscillography binding post, the capacitance control switch and the inductance control switch are all positioned in the RLC function area; the first function area switch is connected with a capacitor and an inductor on a connecting circuit board in series in sequence, two ends of the capacitor and the inductor are respectively connected with a lead out wire and a capacitor control switch and an inductor control switch, the lead out wire at one end of the electric principle inductor is connected with a first wiring terminal, the lead out wire between the capacitor and the inductor is connected with a second wiring terminal, and the lead out wire at one end of the inductor principle capacitor is connected with a third wiring terminal;
second function area switch, first resistance terminal to be tested, second resistance terminal to be tested, first ammeter and adjusting resistor R1Adjusting the resistance RSThe single-arm current bridge resistance measurement functional area; the adjusting resistor RSAnd a second function area switch and a built-in fixed resistor R2Are sequentially connected in series between the positive electrode and the negative electrode on the power supply bin; the adjusting resistor R1Is connected to the fixed resistor R2Remote control resistor RSThe other end of the first ammeter is connected with a lead of the first ammeter on a first to-be-detected resistance binding post; the other lead of the first ammeter is connected with a fixed resistor R2And adjusting the resistance RSIn the meantime.
Specifically, the third functional area switch, the voltmeter selection switch, the diode selection switch, the second ammeter, the voltmeter and the adjusting resistor R3The forward diode and the backward diode are embedded in the front plate surface of the cuboid frame;
wherein the adjusting resistor R3The second ammeter and the diode selection switch are connected in series in sequence; a lead wire '1' of the diode selection switch is connected with the anode of the forward diode, and a lead wire '0' of the diode selection switch is connected with the cathode of the reverse diode; the negative pole of the forward diode and the positive pole of the reverse diode are connected to the third functional area switch and connected to the regulating resistor R3The second ammeter and the diode selection switch are connected in series in the positive and negative electrodes of the circuit;the negative pole of the voltmeter is connected with one end of the third functional area switch, which is far away from the power supply, and the positive pole of the voltmeter is connected with the voltmeter selection switch; the lead wire '1' of the voltmeter selection switch is connected with one end, close to the forward diode, of the ammeter, and the lead wire '0' of the voltmeter selection switch is connected with one end, far away from the reverse diode, of the ammeter.
Specifically, the ammeter switch is embedded in the left plate surface of the cuboid frame and used for controlling power supply and disconnection of the first ammeter independently supplying power.
Specifically, be provided with negative terminal and positive terminal on the 9V battery compartment, negative terminal connects the power negative pole, positive terminal connects the power positive pole.
The names and basic functions of the components mentioned above are shown in table 1 below.
TABLE 1 component names and basic functions
Figure BDA0002947346740000091
Figure BDA0002947346740000101
First, experiment operation
-measuring forward and reverse current-voltage characteristics of diode
1. The power supply is switched on, the negative pole is connected with the negative terminal 1, and the positive pole is connected with the positive terminal 2;
2. opening an ammeter switch 23;
3. opening the third functional zone switch 15;
4. the power supply output voltage is 4V-8V;
5. the voltmeter selection switch 16 and the diode selection switch 17 are set to be in the position '1', and at the moment, the forward diode 21 is on;
6. slowly adjusting the regulating resistance R 320, changing the ammeter 18 and the voltmeter 19 at the two ends of the diode;
7. drawing a volt-ampere characteristic curve by taking 0.1V as a unit;
8. when the reverse current-voltage characteristic curve of the diode is measured, the voltmeter selecting switch 16 and the diode selecting switch 17 in the step 5 are set to be 0, and the reverse diode 22 is not observed to be bright.
Verifying the resistance of the single-arm bridge
1. Connecting the resistor to be tested to the first resistor to be tested binding post and the second resistor to be tested binding post;
2. opening the ammeter switch 23, at which time the first ammeter 12 is observed to be bright;
3. the power is switched on, the positive pole is connected with the positive terminal 2, and the negative pole is connected with the negative terminal 1;
4. turning on the second functional area switch 9;
5. will adjust the resistance R 113 twist to index "6" at which time resistor R is adjusted113 has a resistance of 3000 ohms, R1/R2＝3；
6. The power supply outputs 2-5V of voltage, and the number of the first ammeter 12 is not 0;
7. adjusting the regulating resistance R S14 until the first ammeter 12 hours approach 0, at which time the resistance R is adjustedS14 resistance and R1/R2The product of the two is the resistance value of the resistor to be measured;
8. by adjusting the regulating resistance R 113 changing R1/R2So as to achieve the purpose of expanding and reducing the measuring range.
RLC experiments
1. The power is switched on, the positive pole is connected with the positive terminal 2, and the negative pole is connected with the negative terminal 1;
2. opening the first functional area switch 3;
3. when an RC circuit is researched, the capacitance control switch 7 is required to be arranged at '1' and the inductance control switch 8 is required to be arranged at '0' (so that an inductor is short-circuited), and at the moment, the first oscillography binding post 4 and the second oscillography binding post 5 are connected to two ends of a capacitor;
4. when an RL circuit is researched, an inductance control switch 8 is required to be arranged at '1' and a capacitance control switch 7 is ensured to be arranged at '0' (so that a capacitor is short-circuited), and at the moment, a second oscillography binding post 5 and a third oscillography binding post 6 are connected to two ends of an inductor;
5. when an RLC series circuit is researched, a capacitance control switch 7 and an inductance control switch 8 are required to be all set to be 1 (so that a capacitance inductor works normally), and at the moment, a first oscillography binding post 4 and a second oscillography binding post 5 are connected to two ends of a capacitor.
Second, data recording, processing and error analysis
1. Data records (data record tables to indicate physical quantities and units represented by symbols, and table names)
TABLE 2 measurement of forward and reverse current-voltage characteristics of diodes
Figure BDA0002947346740000131
Table 3 verification of single-arm bridge resistance
Figure BDA0002947346740000132
A transient of the RLC series circuit (as shown in fig. 11-13).
2. Data processing (using list method, drawing method, difference method, least square method, etc. to process data, drawing graph line using calculating paper, calculating uncertainty of A type, B type, synthesis, relative and total synthesis, obtaining standard expression of measurement result and drawing conclusion)
Measuring the current-voltage characteristic of the non-linear element (as shown in FIGS. 8 and 9)
Fig. 8 is a graph of forward current-voltage characteristics of the diode calculated from the relationship between the measured current and voltage, and it can be concluded that the voltage and the current are linear, and the current increases with the increase of the voltage. While verifying the correctness of the device.
Fig. 9 is a graph of reverse current-voltage characteristic data of the diode calculated from the relationship between the measured current and the measured voltage, and it can be concluded that the voltage and the current are in a nonlinear relationship, the reverse current is almost constant when the reverse voltage is small, and the reverse current increases sharply when the reverse voltage exceeds a certain voltage. While verifying the correctness of the device.
Verifying the single bridge resistance (as shown in FIG. 10)
The data of the single-arm bridge resistance measurement is verified, the data measured by the experimental instrument is compared with the data measured by the universal meter, and the data measured by the experimental instrument is very close to the data measured by the universal meter according to the result, so that the result measured by the experimental instrument is accurate.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The utility model provides a multi-functional electricity experiment appearance, its characterized in that, includes the cuboid frame of constituteing by transparent plastic board that can assemble, it is equipped with first function area switch, first oscillography terminal, second oscillography terminal, third oscillography terminal, capacitance control switch, inductance control switch, second function area switch to inlay on the side of cuboid frame, first resistance terminal, the second resistance terminal that awaits measuring, first ampere meter, adjusting resistance R that awaits measuring1A fixed resistor R2Adjusting the resistance RSA third functional area switch, a voltmeter selection switch, a diode selection switch, a second ammeter, a voltmeter and a regulating resistor R3A forward diode, a backward diode, an ammeter switch; a 9V battery bin is arranged at the bottom in the rectangular frame; be provided with 9V battery and connecting circuit board on cuboid frame's the side inner wall, connecting circuit board and 9V battery storehouse are located same inside wall, and the fixed required electric capacity and the inductance of RLC functional area that is connected with on it for realize the connection between first oscillography terminal, second oscillography terminal, third oscillography terminal, capacitance control switch, inductance control switch, electric capacity, the inductance.
2. The multifunctional electrical experiment instrument according to claim 1, wherein the rectangular frame is formed by six transparent plastic plates which are sequentially connected in an inserted manner, the end portion of each transparent plastic plate is provided with a tooth-shaped clamping groove, and two adjacent transparent plastic plates are connected in an inserted manner through the tooth-shaped clamping grooves at the end portions of the two adjacent transparent plastic plates.
3. The multifunctional electrical experiment instrument according to claim 2, wherein the first function area switch, the first oscillographic binding post, the second oscillographic binding post, the third oscillographic binding post, the capacitance control switch, the inductance control switch, the second function area switch, the first resistance binding post to be measured, the second resistance binding post to be measured, the first ammeter and the regulating resistor R are arranged in sequence in the first function area switch and the second function area switch1Adjusting the resistance RSAll embedded in the upper plate surface of the cuboid frame, and the fixed resistor R2The inner surface of the upper plate surface is pasted inside the cuboid frame;
the first function area switch, the first oscillography binding post, the second oscillography binding post, the third oscillography binding post, the capacitance control switch and the inductance control switch are all positioned in the RLC function area; the first function area switch is connected with a capacitor and an inductor on a connecting circuit board in series in sequence, two ends of the capacitor and the inductor are respectively connected with a lead out wire and a capacitor control switch and an inductor control switch, the lead out wire at one end of the electric principle inductor is connected with a first wiring terminal, the lead out wire between the capacitor and the inductor is connected with a second wiring terminal, and the lead out wire at one end of the inductor principle capacitor is connected with a third wiring terminal;
second function area switch, first resistance terminal to be tested, second resistance terminal to be tested, first ammeter and adjusting resistor R1A fixed resistor R2Adjusting the resistance RSThe single-arm current bridge resistance measurement functional area; the adjusting resistor RSAnd a second function area switch and a built-in fixed resistor R2Are sequentially connected in series between the positive electrode and the negative electrode on the power supply bin; the adjusting resistor R1Is connected to the fixed resistor R2Remote control resistor RSThe other end of the first ammeter is connected with a lead of the first ammeter on a first to-be-detected resistance binding post; the other lead of the first ammeter is connected withFixed resistance R2And adjusting the resistance RSIn the meantime.
4. The multifunctional electrical experimental instrument according to claim 2, wherein said third functional area switch, voltmeter selecting switch, diode selecting switch, second ammeter, voltmeter, and adjusting resistor R3The forward diode and the backward diode are embedded in the front plate surface of the cuboid frame;
wherein the adjusting resistor R3The second ammeter and the diode selection switch are connected in series in sequence; a lead wire '1' of the diode selection switch is connected with the anode of the forward diode, and a lead wire '0' of the diode selection switch is connected with the cathode of the reverse diode; the negative pole of the forward diode and the positive pole of the reverse diode are connected to the third functional area switch and connected to the regulating resistor R3The second ammeter and the diode selection switch are connected in series in the positive and negative electrodes of the circuit; the negative pole of the voltmeter is connected with one end of the third functional area switch, which is far away from the power supply, and the positive pole of the voltmeter is connected with the voltmeter selection switch; the lead wire '1' of the voltmeter selection switch is connected with one end, close to the forward diode, of the ammeter, and the lead wire '0' of the voltmeter selection switch is connected with one end, far away from the reverse diode, of the ammeter.
5. The multifunctional electrical experiment instrument according to claim 2, wherein the ammeter switch is embedded in the left plate surface of the rectangular frame and used for controlling the power supply and disconnection of the first ammeter which is independently powered.
6. The multifunctional electrical experiment instrument according to claim 2, wherein a negative terminal and a positive terminal are arranged on the 9V battery chamber, the negative terminal is connected with a negative pole of a power supply, and the positive terminal is connected with a positive pole of the power supply.
CN202110197107.XA 2021-02-22 2021-02-22 Multifunctional electricity experiment instrument Pending CN112767800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110197107.XA CN112767800A (en) 2021-02-22 2021-02-22 Multifunctional electricity experiment instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110197107.XA CN112767800A (en) 2021-02-22 2021-02-22 Multifunctional electricity experiment instrument

Publications (1)

Publication Number Publication Date
CN112767800A true CN112767800A (en) 2021-05-07

Family

ID=75703886

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110197107.XA Pending CN112767800A (en) 2021-02-22 2021-02-22 Multifunctional electricity experiment instrument

Country Status (1)

Country Link
CN (1) CN112767800A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113409662A (en) * 2021-06-21 2021-09-17 江苏省丹阳高级中学 Multifunctional component testing device
CN117872031A (en) * 2023-03-07 2024-04-12 王正洲 Method for determining 10KV line fault by using direct-current single-arm bridge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113409662A (en) * 2021-06-21 2021-09-17 江苏省丹阳高级中学 Multifunctional component testing device
CN113409662B (en) * 2021-06-21 2022-06-28 江苏省丹阳高级中学 Multifunctional component testing device
CN117872031A (en) * 2023-03-07 2024-04-12 王正洲 Method for determining 10KV line fault by using direct-current single-arm bridge

Similar Documents

Publication Publication Date Title
CN101435838B (en) Apparatus for measuring capacitance capacity
US7768292B1 (en) Non-invasive power supply tester
CN112767800A (en) Multifunctional electricity experiment instrument
CN101806640B (en) Measurement system of thermal resistance signal
CN111722044A (en) Direct current charging pile testing method, device and equipment based on frequency sweep calibration shunt
CN1882843A (en) Battery cell voltage and impedance measuring circuit
CN206292307U (en) A kind of device of utilization Wheatstone bridge measuring resistance
CN214671360U (en) Multifunctional electricity experiment instrument
JPH04248472A (en) Method of measuring resistance value
CN106374834B (en) A kind of solar cell voltammetric characteristic measuring circuit and method
CN204945288U (en) A kind of capacitance testing device
CN208076704U (en) Small signal source for examining and determine indirect access type direct current energy meter
CN107037391A (en) Novel and multifunctional electric meter refitting and calibration experiments instrument
CN103823116A (en) Self-checking type precision battery internal resistance instrument
CN203502489U (en) Improved circuit capable of expanding measurement scope of voltmeter
CN113470489A (en) Network type bridge resistance measurement experiment instrument and operation method
CN207336660U (en) One kind simulation electric shock test device
CN220543028U (en) Power supply internal resistance parameter measuring circuit and power supply internal resistance measuring instrument
CN214375061U (en) Volt-ampere characteristic measuring device
CN2563585Y (en) Electronic meter head pointer indication insulation resistance measurer
CN1465981A (en) Electric bridge for experiment
Jain et al. Self-balancing digitizer for resistive half-bridge
CN217332594U (en) Current measuring device
CN218629989U (en) Circuit and device for measuring two-terminal grounding resistance by using natural field
CN210982689U (en) Direct current electronic load device with constant current and constant voltage working modes

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination