CN206210214U - For the electrometer of middle school's electrostatic experiment - Google Patents
For the electrometer of middle school's electrostatic experiment Download PDFInfo
- Publication number
- CN206210214U CN206210214U CN201620705292.3U CN201620705292U CN206210214U CN 206210214 U CN206210214 U CN 206210214U CN 201620705292 U CN201620705292 U CN 201620705292U CN 206210214 U CN206210214 U CN 206210214U
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- electrostatic
- electrometer
- electric charge
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of electrometer for middle school's electrostatic experiment, electrostatic ball is located at casing top surface by insulated terminal, display screen, power switch and zero setting button are located at straight panel and flat board before casing, electric charge acquisition module gathers electrostatic ball electric charge and is input into small-signal and filters conditioning module, the signal output of small-signal filtering conditioning module is to signal amplification module, the signal transmission of signal amplification module is to central processing module, the display signal output of central processing module is to display screen, power module provides the working power of modules, power switch is serially connected with the current supply circuit of power module, zero setting button is serially connected with the electric charge acquisition circuit of electric charge acquisition module, power module, electric charge acquisition module, small-signal filters conditioning module, signal amplification module and central processing module are in casing.This electrometer intuitively shows experimental data by display screen, and uses external-connected port transmission experiment data, improves electrostatic experiment effect, and student can be made effectively to grasp electrostatic knowledge.
Description
Technical field
The utility model is related to a kind of electrometer for middle school's electrostatic experiment.
Background technology
Electrometer is the Quasi-quantitative measurement instrument commonly used in middle school's electrostatic experiment also known as potentiometer or pointer electroscope.
Electrometer can be used for the species for checking object electrically charged（It is positive or negative）, conventional electrostatic meter is as shown in figure 1, it is on base 1
Dial plate 2 is set, and the top of dial plate 2 is provided with electrostatic ball 3, center-pole 4 and pointer 5 are provided with dial plate 2, and electrometer center is first made during experiment
Bar 4 takes the electric charge of Known Species, and electrostatic ball 3 is contacted using the rubbed glass bar of silk, and the subtended angle of pointer 5 becomes big quiet to indicate
The quantity of electric charge on electric ball 3, and show similar with the electric charge of center-pole 4；Show the electricity with center-pole 4 if the subtended angle of pointer 5 diminishes
Lotus foreign peoples.Such electrostatic is calculated as pointer class instrument and indicates the quantity of electric charge and charge species by pointer, lacks the straight of electrostatic experiment
The property seen, and experimentation is more uninteresting, and electrostatic experiment effect is influenceed to a certain degree.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of electrometer for middle school's electrostatic experiment, this electrostatic
Meter overcomes the defect of pointer class measuring instrument, and experimental data is intuitively shown by display screen, and is transmitted using external-connected port real
Data are tested, electrostatic experiment effect is improve, student can be made effectively to grasp electrostatic knowledge.
In order to solve the above technical problems, the electrometer that the utility model is used for middle school's electrostatic experiment includes electrostatic ball, insulation
Terminal, casing, display screen, power switch, zero setting button, power module, electric charge acquisition module, small-signal filtering conditioning module,
Signal amplification module and central processing module, the electrostatic ball are located at the casing top surface, the display screen by insulated terminal
The straight panel before the casing, the power switch and zero setting button are respectively arranged on the casing front panel, the electric charge
The signal input part of acquisition module connects the electrostatic ball, signal output part and connects the input that the small-signal filters conditioning module
End, the output end of the small-signal filtering conditioning module connects the input of the signal amplification module, and the signal amplifies mould
The output end of block connects the signal input part of the central processing module, and the display signal output part of the central processing module connects
The display screen is connect, the power module provides the working power of modules, and the power switch is serially connected with the power supply mould
The current supply circuit of block, the zero setting button is serially connected with the electric charge acquisition circuit of the electric charge acquisition module, the power module, electricity
Lotus acquisition module, small-signal filtering conditioning module, signal amplification module and central processing module are in the casing.
Further, this electrometer also includes wireless transport module, the wireless transport module in the casing and
Signal input part connects the signal output part of the central processing module.
Further, the wireless transport module is bluetooth module or WIFI module.
Further, this electrometer also includes USB interface, and the USB interface is located at the housing side wall and connects described
The signal output part of central processing module.
Because the electrometer that the utility model is used for middle school's electrostatic experiment employs above-mentioned technical proposal, i.e. this electrometer
Electrostatic ball is located at casing top surface by insulated terminal, and display screen, power switch and zero setting button are located at straight panel peace before casing
Plate, electric charge acquisition module collection electrostatic ball electric charge is simultaneously input into small-signal filtering conditioning module, small-signal filtering conditioning module
Signal output to signal amplification module, the signal transmission of signal amplification module to central processing module, central processing module it is aobvious
Show signal output to display screen, power module provides the working power of modules, and power switch is serially connected with the confession of power module
Electrical circuit, zero setting button is serially connected with the electric charge acquisition circuit of electric charge acquisition module, power module, electric charge acquisition module, small-signal
Filtering conditioning module, signal amplification module and central processing module are in casing.This electrometer overcomes pointer class measuring instrument
The defect of device, experimental data is intuitively shown by display screen, and uses external-connected port transmission experiment data, improves electrostatic experiment
Effect, can make student effectively grasp electrostatic knowledge.
Brief description of the drawings
The utility model is described in further detail with implementation method below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of conventional electrostatic meter；
Fig. 2 is the electrometer structural representation that the utility model is used for middle school's electrostatic experiment；
Fig. 3 is the theory diagram of modules in this electrometer；
Fig. 4 and Fig. 5 is electric charge acquisition module physical circuit figure in this electrometer；
Fig. 6 is the physical circuit figure of signal amplification module in this electrometer.
Specific embodiment
Embodiment as shown in Figures 2 and 3, the utility model be used for middle school's electrostatic experiment electrometer include electrostatic ball 6, absolutely
Acies 7, casing 8, display screen 9, power switch 10, zero setting button 11, power module 12, electric charge acquisition module 13, small-signal
Filtering conditioning module 14, signal amplification module 15 and central processing module 16, the electrostatic ball 6 are located at institute by insulated terminal 7
The top surface of casing 8 is stated, the display screen 9 located at straight panel 81 before the casing 8, distinguish by the power switch 10 and zero setting button 11
Located at the front panel 82 of the casing 8, the signal input part connection electrostatic ball 6, signal of the electric charge acquisition module 13 is defeated
Go out the input that the end connection small-signal filters conditioning module 14, the output end connection of the small-signal filtering conditioning module 14
The input of the signal amplification module 15, the output end of the signal amplification module 15 connects the central processing module 16
Signal input part, the display signal output part of the central processing module 16 connects the display screen 9, and the power module 12 is carried
For the working power of modules, the power switch 10 is serially connected with the current supply circuit of the power module 12, and the zero setting is pressed
Button 11 is serially connected with the electric charge acquisition circuit of the electric charge acquisition module 13, the power module 12, electric charge acquisition module 13, small letter
Number filtering conditioning module 14, signal amplification module 15 and central processing module 16 are in the casing 8.
Preferably, this electrometer also includes wireless transport module 17, and the wireless transport module 17 is in the casing 8
And signal input part connects the signal output part of the central processing module 16.
Preferably, the wireless transport module 17 is bluetooth module or WIFI module.
Preferably, this electrometer also includes usb 18, and the usb 18 is located at the side plate 83 of the casing 8 and connects
Connect the signal output part of the central processing module 16.
This electrometer is used to measure object institute static electrification electricity and polarity, and it is internal using highly integrated digital integration
Circuit module realizes collection, conversion, transmission and the treatment display of electric charge small-signal, can provide high accuracy, the electricity of high stability
Lotus measures.This electrometer uses the graphic user interface, display screen can to use 5 cun of segmentation color LCD screen Dynamic Announces directly perceived
The change of electricity and experimental data, power module can be worked independently using the portable design of built-in lithium battery with off line.Separately
Outer electrometer can provide USB interface or wireless transport module and upper machine communication, realize the collection of experimental data, show, deposit
Storage and later stage treatment.The band power consumption of electric charge acquisition module collection electrostatic ball is simultaneously processed, letter through small-signal filtering conditioning module
Voltage signal is amplified and is transmitted after analog-to-digital conversion process to central processing module by number amplification module, and central processing module is by signal
Treatment is shown after being converted into corresponding charge value by display screen.
As shown in Figure 4 and Figure 5, electric charge acquisition module coordinates 16 analog-to-digital conversions of high accuracy using high impedance charge amplifier
Chip realizes the digital collection of electrostatic electricity, distinguishable faint electric quantity change.U3A and U3B is high input impedance computing in Fig. 4
Faint charge signal change is converted into measurable digital voltage signal, U3A by amplifier, U3B composition electric charge change-over circuits
The circuit of composition provides zero point level for the circuit that U3B is constituted so that the electricity of the measurable positive and negative change of electrometer.Fig. 5 is electricity
The clear circuit that lotus acquisition module is made up of signal relay U4, its effect is that the sampling in short-circuit U3B built-up circuits keeps electricity
Hold C2 two ends, i.e., the electricity accumulated on release electrostatic ball, display screen display 0nC after clear operation all should before remeasuring every time
Clear operation is first carried out, central processing module detects control clear circuit when zero setting button is pressed and carries out a clear operation.
As shown in fig. 6, the signal amplification module in this electrometer constitutes letter using built-in 1-128 times of programmable amplifier U5
Number amplifying circuit, it supports that single-ended and double-width grinding, central processing module can gather the numeral letter after amplifying by SPI interface
Number.
Central processing module in this electrometer can be using the single-chip microcomputer of model C8051F340, its running frequency
48MHZ, supports USB2.0 communication interfaces.
This electrometer show with numeral, graphic form, can direct reading, lightly easy to carry and measurement range extensively, in reality
During testing, using electrostatic ball is contacted after silk friction glass bar or rubber bar, glass bar can directly be read by this electrometer
Or the quantity of electric charge and polarity of rubber bar institute band, and electric charge is lossless in a long time, it is clear by zero setting button when measuring again
Zero, to ensure the accuracy of measurement.After electrometer is reset simultaneously, hold metallic plate and be positioned over electrostatic ball top, will be powered
Glass bar or rubber bar observe the measurement result of electrometer, to understand electrostatic screen phenomenon near metallic plate.
Claims (4)
1. a kind of electrometer for middle school's electrostatic experiment, including electrostatic ball and insulated terminal, it is characterised in that：The present apparatus is also wrapped
Include casing, display screen, power switch, zero setting button, power module, electric charge acquisition module, small-signal filtering conditioning module, signal
Amplification module and central processing module, the electrostatic ball are located at the casing top surface by insulated terminal, and the display screen is located at
Straight panel before the casing, the power switch and zero setting button are respectively arranged on the casing front panel, the electric charge collection
The signal input part of module connects the electrostatic ball, signal output part and connects the input that the small-signal filters conditioning module,
The output end of the small-signal filtering conditioning module connects the input of the signal amplification module, the signal amplification module
Output end connects the signal input part of the central processing module, the display signal output part connection institute of the central processing module
Display screen is stated, the power module provides the working power of modules, and the power switch is serially connected with the power module
Current supply circuit, the zero setting button is serially connected with the electric charge acquisition circuit of the electric charge acquisition module, and the power module, electric charge are adopted
Collection module, small-signal filtering conditioning module, signal amplification module and central processing module are in the casing.
2. the electrometer for middle school's electrostatic experiment according to claim 1, it is characterised in that：This electrometer also includes nothing
Line transport module, the wireless transport module is in the casing and signal input part connects the central processing module
Signal output part.
3. the electrometer for middle school's electrostatic experiment according to claim 2, it is characterised in that：The wireless transport module
It is bluetooth module or WIFI module.
4. the electrometer for middle school's electrostatic experiment according to claim 1,2 or 3, it is characterised in that：This electrometer is also
Including USB interface, the USB interface is located at the housing side wall and connects the signal output part of the central processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620705292.3U CN206210214U (en) | 2016-07-06 | 2016-07-06 | For the electrometer of middle school's electrostatic experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620705292.3U CN206210214U (en) | 2016-07-06 | 2016-07-06 | For the electrometer of middle school's electrostatic experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206210214U true CN206210214U (en) | 2017-05-31 |
Family
ID=58756219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620705292.3U Active CN206210214U (en) | 2016-07-06 | 2016-07-06 | For the electrometer of middle school's electrostatic experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206210214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591067A (en) * | 2016-07-06 | 2018-01-16 | 陈强 | Electrometer for middle school's electrostatic experiment |
-
2016
- 2016-07-06 CN CN201620705292.3U patent/CN206210214U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591067A (en) * | 2016-07-06 | 2018-01-16 | 陈强 | Electrometer for middle school's electrostatic experiment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110031137A (en) | A kind of spring touch finger is comprehensive to compress force checking device | |
| CN206210214U (en) | For the electrometer of middle school's electrostatic experiment | |
| CN204744166U (en) | Fat balance is examined to intelligence | |
| CN206422805U (en) | A kind of mobile phone with blood sugar test function | |
| CN203117280U (en) | STM 32-based intelligent four-probe meter | |
| CN203786176U (en) | Intelligent mobile terminal based portable oscilloscope | |
| CN107591067A (en) | Electrometer for middle school's electrostatic experiment | |
| CN205301405U (en) | Novel digital power frequency virtual value multimeter of low -power consumption | |
| CN204422507U (en) | Intelligence wrist-negative ion measuring instrument | |
| CN207036340U (en) | Acquisition and analysis instrument | |
| CN209589309U (en) | A kind of spring touch finger is comprehensive to compress force checking device | |
| CN103076484B (en) | electrical test system and method | |
| CN214310656U (en) | Centralized measuring system | |
| CN202256238U (en) | Portable edible oil quality test device | |
| CN205786450U (en) | A kind of grain moisture based on GPRS technology detection device | |
| CN206002169U (en) | A kind of electric coupling measures the detection means of liquid capacity | |
| CN105425028A (en) | Microwave power measurer based on FPGA | |
| CN205229297U (en) | Use electric energy meter of card agate sampling resistor | |
| CN204330656U (en) | A kind of blood gas analyzer with W shape blood gas analysis room | |
| CN205920590U (en) | Portable handheld terminating set | |
| CN209559950U (en) | A kind of Novel universal table | |
| CN215678318U (en) | Equipment for solving data transmission and automatically accounting data | |
| CN214502769U (en) | Electronic equipment for testing flexible pressure sensor | |
| CN214539703U (en) | Measuring device | |
| CN206832967U (en) | A kind of apparatus for testing electric capacit in batter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |