CN103021238A - Digital static tester - Google Patents
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- CN103021238A CN103021238A CN201210521414XA CN201210521414A CN103021238A CN 103021238 A CN103021238 A CN 103021238A CN 201210521414X A CN201210521414X A CN 201210521414XA CN 201210521414 A CN201210521414 A CN 201210521414A CN 103021238 A CN103021238 A CN 103021238A
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Abstract
The invention provides a digital static tester which comprises a signal processing circuit, a master control circuit, a liquid crystal display circuit, a power source circuit, a wireless emission circuit and a wireless receiving circuit. The signal processing circuit, the master control circuit, the liquid crystal display circuit and the wireless transmission circuit are all connected with the power source circuit, the signal processing circuit is connected with the master control circuit, the liquid crystal display circuit and the wireless transmission circuit are both connected with the master control circuit, and the wireless transmission circuit is in Bluetooth wireless communication connection with the wireless receiving module. The digital static tester is provided with a large-capacitance circuit, the electrified potential is correspondingly reduced, and by means of a digital signal collecting function, data in a static test can be displayed, recorded and stored in dynamic real-time mode. The digital static tester can display whether charges are large or small and can display whether the charges are positive or negative in quantitative mode, is free of influence from the external environment and reliable to use, and has the advantages of being capable of indicating polarity, high and adjustable in sensitivity, capable of performing quantitative research and process research and capable of being used in large-scale demonstration and the like.
Description
Technical field
The present invention relates to a kind of tester for the measurement of electrostatic quantity of electric charge, belong to the electrostatic experiment technical field.
Background technology
Static is very unique in a physics teaching in secondary school content part, also is the part that the student is very difficult to understand.Its uniqueness is that the correlation degree of this part content and other parts is little, and is relatively isolated, and comparatively abstract; But because be the rudimentary knowledge of the rare student can be led atomic physics and even quantum theory in the physics teaching in secondary school, the static content is indispensable.Because the characteristic of static and the restriction of traditional experiment instrument cause the electrostatic experiment difficulty to be done, and cause student's indigestion.Traditional electrometer has adopted " condenser type " structure, has consisted of electric capacity by instrument itself, therefore, keeps insulation good (comprising that air is dry) and equipment clean, becomes Success in Experiment whether key.But because the restriction of experimental situation, the as easy as rolling off a log impact that is subject to air humidity or temperature is leaked electricity in the experiment, causes the success ratio of experiment not high.Traditional electrometer also has the defective of two aspects, does not namely have the data of quantification, can only judge qualitatively by the inclined to one side size of pointer the size of electric charge, can not distinguish the polarity of electric charge.
Summary of the invention
The present invention is directed to the deficiency that existing electrostatic experiment technology exists, provide a kind of and be not subjected to external environment influence, can show the digital electrostatic experiment device that electric charge is positive and negative and carry out quantitative examination.
Digital electrostatic experiment device of the present invention is by the following technical solutions:
This numeral electrostatic experiment device comprises signal conditioning circuit, governor circuit, liquid crystal display circuit, power circuit
,Radio transmitter and wireless receiving module; Signal conditioning circuit, governor circuit, liquid crystal display circuit and radio transmitter all are connected with power circuit, signal conditioning circuit is connected with governor circuit, liquid crystal display circuit and radio transmitter all are connected with governor circuit, adopt blue tooth wireless communication to be connected between radio transmitter and the wireless receiving module; Wireless receiving module comprises wireless receiving circuit, Data Analysis circuit, usb circuit and feed circuit, wireless receiving circuit is connected with the Data Analysis circuit, the Data Analysis circuit is connected with usb circuit, and wireless receiving circuit, Data Analysis circuit and usb circuit all are connected with feed circuit.
Signal conditioning circuit comprises inductive head, capacitor C 24, reed switch relay U8, zeroing button S1, high input impedance operational amplifier U6 and dual operational amplifier U9; Inductive head is connected to capacitor C 24 through resistance R 18, capacitor C 24 1 end ground connection, and the other end is connected to operational amplifier U6, and operational amplifier U6 is connected with dual operational amplifier U9, and dual operational amplifier U9 is connected with single-chip microcomputer U2 in the governor circuit; Reed switch relay U8 and zeroing button S1 form zeroing circuit, and zeroing button S1 is connected with reed switch relay U8, and reed switch relay U8 is connected with the voltage output end of capacitor C 24 on the one hand, on the one hand ground connection.
Governor circuit comprises single-chip microcomputer U2, download interface and battery power detection circuit (resistance R 30 and R31); Download interface and battery power detection circuit all are connected with single-chip microcomputer U2.
Liquid crystal display circuit comprises lcd driver U5, liquid crystal display and field effect transistor Q1, and liquid crystal display is connected with lcd driver U5, and field effect transistor Q1 is connected with liquid crystal display, and lcd driver U5 is connected with single-chip microcomputer U2 in the governor circuit.
Power circuit comprises on/off circuit, mu balanced circuit, positive-negative power circuit and reference source circuit four parts; On/off circuit is by field effect transistor Q2 and switching on and shutting down button S2; Mu balanced circuit uses voltage stabilizing chip U1, will stabilize to 3.3V voltage by the power supply of on/off circuit input, for governor circuit, liquid crystal display circuit, wireless communication line provide power supply; The generating positive and negative voltage circuit adopts positive-negative power chip U7, and output ± 15V voltage provides positive-negative power for signal conditioning circuit; Reference source circuit adopts reference source chip U3, and the 2.5V voltage that stable output ripple is very little provides voltage reference for the inner ADC module of the single-chip microcomputer in the governor circuit.
Radio transmitter comprises from bluetooth serial ports module U4 and field effect transistor Q4, be connected with single-chip microcomputer U2 the governor circuit from bluetooth serial ports module U4, field effect transistor Q4 be connected from bluetooth serial ports module U4 and be connected with single-chip microcomputer U2 the governor circuit.
Wireless receiving circuit in the wireless receiving module, comprise main bluetooth serial ports module U11, Bluetooth pairing pilot lamp D7 and pairing button S2, main bluetooth serial ports module U11 is connected with Bluetooth pairing pilot lamp D7, pilot lamp D7 be used to indicate main bluetooth serial ports module U11 whether with from the successful matching of bluetooth serial ports module, pairing button S2 links to each other with main bluetooth serial ports module U11.Main bluetooth serial ports module U11 receives the electromagnetic wave from bluetooth serial ports module U4 emission of with it pairing, and with the interior data information analysis out, sends to the Data Analysis circuit.
Data Analysis circuit in the wireless receiving module, comprise single-chip microcomputer U10 and program download interface J3, the program download interface is connected with single-chip microcomputer U10, and the program that is used for single-chip microcomputer U10 is downloaded, single-chip microcomputer U10 is used for receiving the data that main bluetooth serial ports module U11 sends, and carries out data and resolve.
Interface circuit in the wireless receiving module comprises Transient Suppression Diode TVS1 and USB interface, and Transient Suppression Diode TVS1 connects USB interface and single-chip microcomputer U10, and electrostatic protective function is played in communication to data, and USB interface is used for being connected with outer computer.
The feed circuit of wireless receiving module comprise voltage stabilizing chip U12, for output+3.3V voltage after the voltage stabilizing of general+5V voltage.
Wireless receiving module is connected with computing machine, turns on the power switch, and flicking zeroing button, make liquid crystal display be shown as zero.Use the glass bar or the rubber bar that rubbed to come close to or in contact with input end (inductive head), liquid crystal display will show current electrostatic charge.The quantity of electric charge that Computer display is current and quantity of electric charge oscillography show.
The present invention is provided with high-c circuit, electric capacity than conventional electrostatic meter large several magnitudes, the also corresponding reduction of electromotive force after charged by digitized signals collecting function, can be carried out real-time dynamic display and record storage to the data in the electrostatic experiment.The size that not only can quantitatively show electric charge, and can show the positive and negative of electric charge, not affected by external environmental factor, use reliably, have that polarity indication, high sensitivity and sensitivity are adjustable, quantitative examination, process study, can be for characteristics such as large-scale demonstrations.
Description of drawingsQuiet
Fig. 1 is the Facad structure synoptic diagram of the present invention's numeral electrostatic experiment device.
Fig. 2 is the reverse side structural representation of the present invention's numeral electrostatic experiment device.
Fig. 3 is the circuit theory diagrams of signal conditioning circuit among the present invention.
Fig. 4 is the circuit theory diagrams of governor circuit among the present invention.
Fig. 5 is the circuit theory diagrams of liquid crystal display circuit among the present invention.
Fig. 6 is the circuit theory diagrams of mu balanced circuit among the present invention.
Fig. 7 is the circuit theory diagrams of on/off circuit among the present invention.
Fig. 8 is the circuit theory diagrams of positive-negative power circuit among the present invention.
Fig. 9 is the circuit theory diagrams of reference source circuit among the present invention.
Figure 10 is the circuit theory diagrams of radio transmitter among the present invention.
Figure 11 is the circuit theory diagrams of wireless receiving module among the present invention.
Figure 12 is the circuit theory diagrams of the Data Analysis circuit of wireless receiving module among the present invention.
Figure 13 is the circuit theory diagrams of the usb circuit of wireless receiving module among the present invention.
Figure 14 is the circuit theory diagrams of the feed circuit of wireless receiving module among the present invention.
Wherein: 1, power switch, 2, the zeroing button, 3, input end, 4, liquid crystal display, 5, support, 6, ground wire plug, 7, battery compartment.
Embodiment
Electrostatic experiment device of the present invention is one and comprises signal conditioning circuit, governor circuit, liquid crystal display circuit, power circuit
,Radio transmitter, wireless receiving module and computer software are at interior experiment teaching system, and wherein signal conditioning circuit, governor circuit, liquid crystal display circuit, power circuit and radio transmitter form electrometer.Wherein power circuit comprises again mu balanced circuit, on/off circuit, positive-negative power circuit, reference source circuit.Power circuit provides power supply for whole circuit, signal conditioning circuit is connected with governor circuit, the various signals of signal conditioning circuit collection are delivered to governor circuit and are processed, governor circuit is connected with radio transmitter with liquid crystal display circuit, and the digital signal of handling well is shown also and can deliver to radio transmitter by serial interface at liquid crystal display.Adopt blue tooth wireless communication between radio transmitter and the wireless receiving module, wireless receiving module is uploaded to computing machine with experimental data, carries out data by the software in the computing machine and processes.
The outward appearance of electrostatic experiment device as depicted in figs. 1 and 2, the right side is provided with power switch 1, the upper right side be provided with the zeroing button 2, the upper left side is provided with input end 3, the front arranges liquid crystal display 4, the bottom is provided with support 5.As shown in Figure 2, bottom, the left side is provided with ground receptacle 6.The electrometer bottom surface is provided with battery compartment 7, and what install in the battery compartment 7 is the lithium battery of nominal 3.7V.
Annex has spherical input end, faraday cylinder, zine plate, barricade.Can change different annexes according to different experiments, faraday cylinder can be done the experiment of two kinds of electric charges, and zine plate can be used for doing photoelectric effect experiment, and spherical input end and barricade combination can be used for doing the electrostatic screening experiment.
During experiment, wireless receiving module is connected with computing machine, clicks and press power switch 1, power-on.Click zeroing button 2, what make liquid crystal display 4 is shown as zero.The object proximity of static electrification or the contact electrometer input end 3 time, signal conditioning circuit amplifies adjustment to electric signal.Process and change into digital signal by the single-chip microcomputer U2 in the governor circuit, subsequently signal data is shown at liquid crystal display 4, and send by radio transmitter.After wireless receiving module receives signal, carry out Data Analysis by the single-chip microcomputer U1 in the Data Analysis circuit, and by the USB mouth resolution data is uploaded to computing machine.Computing machine will show in real time according to the acquisition data size of electrostatic charge, but and oscillography demonstration data.The measurements and calculations result all shows by computer software, and can carry out by man-machine interaction original measurement result's processing and application.Computer software adopts the VC++ exploitation, and installation and operation is on the mainstream operation systems such as WindowsXP, Windows7, and built-in formula storehouse and algorithms library are supported the demand that the middle school physical experiment data are processed.
Signal conditioning circuit comprises that mainly inductive head, basic propylene capacitor C 24, reed switch relay U8, zeroing button S1(are the zeroing button 2 among Fig. 1 as shown in Figure 3), high input impedance operational amplifier U6(INA116UA) and dual operational amplifier U9(TL062).Capacitor C 24 is basic propylene electric capacity, and electric capacity is 10000pF, and polypropylene capactive is nonpolarity, and insulation impedance is very high, frequency characteristic excellent (frequency response is broad), and also dielectric loss is very little.Based on above advantage, can guarantee effectively that the electric charge of electric capacity storage can not leak not at short notice.Inductive head is connected to basic propylene capacitor C 24 through resistance R 18, and when with the object proximity of static or contact induction head (input end), electric charge will charge to capacitor C 24, can form electric potential difference at the two ends of capacitor C 24.By C=Q/U as can be known, the voltage U at capacitor C 24 two ends is directly proportional with the charge Q of inflow.Capacitor C 24 1 end ground connection, the other end is connected to operational amplifier U6(INA116UA), the input impedance of INA116UA is greater than 10
15Ω, leakage current is minimum, therefore can guarantee that the electric charge of capacitor C 24 can very fast loss.Input to dual operational amplifier U9 through the signal after the impedance transformation of operational amplifier U6 and amplify, adjust, with the input requirements of the ADC that meets single-chip microcomputer U2.Be connected to dual operational amplifier U9(TL062 behind the output pin process R24 of INA116UA, the R27 electric resistance partial pressure).Signal exports governor circuit to by the 7th pin after dual operational amplifier U9 amplifies.Because electric charge is difficult to miss in the electric capacity, in order to carry out fast revision test, therefore increased zeroing circuit, zeroing circuit is comprised of zeroing button S1 and reed switch relay U8, zeroing button S1 is connected with reed switch relay U8,1 pin of reed switch relay U8 is connected with the voltage output end of polypropylene capactive C24,3, the 4 pin ground connection of reed switch relay U8.When zeroing button S1 pressed, 2 pin of reed switch relay U8 had the voltage input, and 1 pin of reed switch relay U8 just can be connected with ground inner, and the electric charge in the basic propylene capacitor C 24 just can pour off very soon.
Governor circuit comprises single-chip microcomputer U2(C8051F410 as shown in Figure 4), download interface and battery power detection circuit (resistance R 30 and R31).The output signal of signal conditioning circuit is connected to the 29th pin of single-chip microcomputer U2, and this pin is the input pin of Chip Microcomputer A/D C by the single-chip microcomputer application configuration, and single-chip microcomputer U2 carries out the AD sampling to signal.Download interface and battery power detection circuit all are connected with single-chip microcomputer U2.The 21st, 22 serial port pin of single-chip microcomputer U2 are connected to radio transmitter.The 17th, 18,19,20 pin of single-chip microcomputer U2 are connected to liquid crystal display circuit.Data after single-chip microcomputer U2 processes can show at liquid crystal display, also can transfer to wireless receiving module by radio transmitter.Resistance R 30 and R31 are connected to the 24th pin of single-chip microcomputer U2 after to lithium battery voltage dividing potential drop, the 24th pin is configured to the input pin of ADC, single-chip microcomputer U2 carries out the rear electric quantity data of judging lithium battery of AD sampling, and with information about power in the liquid crystal screen display, when electric weight was lower than minimum threshold values, single-chip microcomputer U2 was with the powered-down circuit.Single-chip microcomputer U2 is by the on/off of the 16th foot control radio transmitter processed.
Liquid crystal display circuit comprises that mainly lcd driver U5(segment liquid crystal screen drives chip HT1621B as shown in Figure 5), liquid crystal display (the segment liquid crystal screen lcd1 of customization) and field effect transistor Q1(AO3401).HT1621B is 128 points, memory mapping and multi-functional lcd driver, the 9th, 10,11,12 pin of HT1621B are connected to single-chip microcomputer U2, the SEG[0:19 of HT1621B] be connected to successively the SEG[0:19 of liquid crystal display] pin, to HT1621B, HT1621B realizes the demonstration of segment liquid crystal screen is refreshed single-chip microcomputer U2 with the data transmission that shows.Field effect transistor Q1 is connected with backlight board of liquid crystal screen, liquid crystal display backlight by field effect transistor Q1 by Single-chip Controlling, field effect transistor Q1(AO3401) the LCD_EN signal wire be connected to single-chip microcomputer U2, can control liquid crystal display light on and off backlight.
The mu balanced circuit of power circuit mainly comprises voltage stabilizing chip U1(LTC3440EMS as shown in Figure 6).Voltage stabilizing chip U1 and peripheral circuits can be converted into stable 3.3V voltage through the power supply input, for whole other circuit provides the 3.3V power supply.
The on/off circuit of power circuit mainly comprises 1 joint 3.7V nominal lithium battery BT1, field effect transistor Q2 as shown in Figure 7.Lithium battery BT1 is connected to on/off circuit, and when switching on and shutting down button S2 pressed, boot-strap circuit made field effect transistor Q2 conducting, simultaneously push button signalling is reached the P1.6 pin of single-chip microcomputer U2, single-chip microcomputer U2 detects push button signalling, by the field effect transistor Q2 state locking processed of P1.5 foot control, finishes start.When the switching on and shutting down button was pressed again, single-chip microcomputer U2 detected push button signalling, and control P1.5 pin makes field effect transistor Q2 cut-off, finishes shutdown.
The positive negative circuit of power circuit adopts positive-negative power chip U7(LTC1945 as shown in Figure 8).Positive-negative power chip U7 can stablize output ± 15V voltage, for operational amplifier U6 in the signal conditioning circuit and dual operational amplifier U9 provide positive-negative power.
The reference source circuit of power circuit mainly comprises reference source chip U3(ADR391AUJZ as shown in Figure 9).Reference source chip U3 can the very little 2.5V voltage of output ripple, and output is connected to the 11st pin (VREF pin) of single-chip microcomputer U2, for the adc circuit of single-chip microcomputer U2 inside provides stable reference source, guarantees that the ADC sampled value gets accurate stable.
Radio transmitter mainly comprises as shown in figure 10 from bluetooth serial ports module U4 and field effect transistor Q4.Be connected with single-chip microcomputer U2 the 21st, 22 pin from the 1st, 2 pin of bluetooth serial ports module U4.Field effect transistor Q4 is connected and is connected with 16 pin of single-chip microcomputer U2 the governor circuit with 12 pin from bluetooth serial ports module U4.Field effect transistor Q4 is by the power supply of the 16 foot control systems of single-chip microcomputer U2 with flexible switch bluetooth module.
Wireless receiving module comprises wireless receiving circuit, Data Analysis circuit, usb circuit and feed circuit, wireless receiving circuit is connected with the Data Analysis circuit, the Data Analysis circuit is connected with usb circuit, wireless receiving circuit, Data Analysis circuit and usb circuit all are connected with feed circuit, and feed circuit provide power supply for other circuit.
The wireless receiving circuit of wireless receiving module comprises main bluetooth serial ports module U11, Bluetooth pairing pilot lamp D7 and pairing button S2 as shown in figure 11.Main bluetooth serial ports module U11 receives the 2.4GHz electromagnetic wave from the emission of bluetooth serial ports module of with it pairing, and with the interior data information analysis out, sends to the Data Analysis circuit by serial interface.Main bluetooth serial ports module U11 is connected with Bluetooth pairing pilot lamp D7, pilot lamp D7 be used to indicate main bluetooth serial ports module whether with from the successful matching of bluetooth serial ports module.Pairing button S2 links to each other with the 26th pin of main bluetooth serial ports module U11, and master's bluetooth serial ports module U11 will search for again from bluetooth serial ports module U4, automatic matching when pressing.
The Data Analysis circuit of wireless receiving module mainly comprises single-chip microcomputer U10 and program download interface J3 as shown in figure 12.Single-chip microcomputer U10 is used for receiving the data that main bluetooth serial ports module sends, and it is carried out Data Analysis, is uploaded to computing machine by interface circuit again.The program download interface is connected to the 13rd, 14 pin of single-chip microcomputer U10, and the program that is used for single-chip microcomputer U10 is downloaded.
The interface circuit of wireless receiving module mainly comprises Transient Suppression Diode TVS1 and USB interface as shown in figure 13.Transient Suppression Diode TVS1 connects the 8th, 9 pin of USB interface and single-chip microcomputer U10, and electrostatic protective function is played in communication to data, and USB interface is connected with computing machine.
The feed circuit of wireless receiving module mainly comprise voltage stabilizing chip U12 as shown in figure 14, and+5V voltage connects the 1st, 3 pin of voltage stabilizing chip U12, after its voltage stabilizing from the 5th pin output+3.3V voltage.
The experiment model of above-mentioned electrostatic experiment device is as described below:
Wireless receiving module is accessed computing machine, turn on the power switch 1, and flicking zeroing button 2, this moment, liquid crystal display 4 was shown as zero.Wireless sign flicker during start on the liquid crystal display 4, complete with the wireless receiving module pairing when radio transmitter, wireless sign lights no longer glimmers.
The rubber bar that the glass bar that the use silk rubbed or fur rubbed comes close to or in contact with input end (inductive head), and liquid crystal display 4 will show current electrostatic charge.Open the computing machine special software, click " beginning record ", computer software begins to show the current quantity of electric charge, clicks " oscillography " button, and quantity of electric charge oscillography shows.
The present invention has following characteristics:
1, polarity indication: judge polarity chron when needs, the conventional electrostatic meter must have a reference charge, and electrometer of the present invention can directly be indicated polarity.
2, high sensitivity and sensitivity are adjustable: sensitivity of the present invention is significantly higher than the conventional electrostatic meter and sensitivity can be adjusted, and the scope of electrostatic experiment can enlarge because of the upgrading of survey instrument.
3, quantitative examination: a considerable advantage of the present invention has been linear scale, compares with conventional electrostatic meter that can only rough measure, and precision is higher.Therefore can verify that physical law is linearity or exponential relationship with the present invention.This so that the experiment in broken away from the qualitative observation state, entered into measurement, analysis phase.Not only the size of electric charge can be quantitatively shown, and the positive and negative of electric charge can be shown.
4, process study: the present invention can show, record by the oscillography display mode process of electrostatic experiment real-time dynamicly.
5, can be for large-scale demonstration: link to each other with computing machine, special software has the plurality of display modes such as numeral, oscillography, instrument, can with the modernized audio-visual education programme means couplings such as projection, blank.
Claims (8)
1. a digital electrostatic experiment device comprises signal conditioning circuit, governor circuit, liquid crystal display circuit, power circuit
,Radio transmitter and wireless receiving module; It is characterized in that: signal conditioning circuit, governor circuit, liquid crystal display circuit and radio transmitter all are connected with power circuit, signal conditioning circuit is connected with governor circuit, liquid crystal display circuit and radio transmitter all are connected with governor circuit, adopt blue tooth wireless communication to be connected between radio transmitter and the wireless receiving module; Wireless receiving module comprises wireless receiving circuit, Data Analysis circuit, usb circuit and feed circuit, wireless receiving circuit is connected with the Data Analysis circuit, the Data Analysis circuit is connected with usb circuit, and wireless receiving circuit, Data Analysis circuit and usb circuit all are connected with feed circuit.
2. digital electrostatic experiment device according to claim 1 is characterized in that: described signal conditioning circuit comprises inductive head, capacitor C 24, reed switch relay U8, zeroing button S1, high input impedance operational amplifier U6 and dual operational amplifier U9; Inductive head is connected to capacitor C 24 through resistance R 18, capacitor C 24 1 end ground connection, and the other end is connected to operational amplifier U6, and operational amplifier U6 is connected with dual operational amplifier U9, and dual operational amplifier U9 is connected with single-chip microcomputer U2 in the governor circuit; Reed switch relay U8 and zeroing button S1 form zeroing circuit, and zeroing button S1 is connected with reed switch relay U8, and reed switch relay U8 is connected with the voltage output end of capacitor C 24 on the one hand, on the one hand ground connection.
3. digital electrostatic experiment device according to claim 1, it is characterized in that: described governor circuit comprises single-chip microcomputer U2, download interface and battery power detection circuit; Download interface and battery power detection circuit all are connected with single-chip microcomputer U2.
4. digital electrostatic experiment device according to claim 1, it is characterized in that: described liquid crystal display circuit, comprise lcd driver U5, liquid crystal display and field effect transistor Q1, liquid crystal display is connected with lcd driver U5, field effect transistor Q1 is connected with liquid crystal display, and lcd driver U5 is connected with single-chip microcomputer U2 in the governor circuit.
5. digital electrostatic experiment device according to claim 1, it is characterized in that: described radio transmitter, comprise from bluetooth serial ports module U4 and field effect transistor Q4, be connected with single-chip microcomputer U2 the governor circuit from bluetooth serial ports module U4, field effect transistor Q4 be connected from bluetooth serial ports module U4 and be connected with single-chip microcomputer U2 the governor circuit.
6. digital electrostatic experiment device according to claim 1, it is characterized in that: the wireless receiving circuit in the described wireless receiving module, comprise main bluetooth serial ports module U11, Bluetooth pairing pilot lamp D7 and pairing button S2, main bluetooth serial ports module U11 is connected with Bluetooth pairing pilot lamp D7, pilot lamp D7 be used to indicate main bluetooth serial ports module U11 whether with from the successful matching of bluetooth serial ports module, pairing button S2 links to each other with main bluetooth serial ports module U11;
Main bluetooth serial ports module U11 receives the electromagnetic wave from bluetooth serial ports module U4 emission of with it pairing, and with the interior data information analysis out, sends to the Data Analysis circuit.
7. digital electrostatic experiment device according to claim 1, it is characterized in that: the Data Analysis circuit in the described wireless receiving module, comprise single-chip microcomputer U10 and program download interface J3, the program download interface is connected with single-chip microcomputer U10, the program that is used for single-chip microcomputer U10 is downloaded, single-chip microcomputer U10 is used for receiving the data that main bluetooth serial ports module U11 sends, and carries out data and resolve.
8. digital electrostatic experiment device according to claim 1; it is characterized in that: the interface circuit in the described wireless receiving module; comprise Transient Suppression Diode TVS1 and USB interface; Transient Suppression Diode TVS1 connects USB interface and single-chip microcomputer U10; electrostatic protective function is played in communication to data, and USB interface is used for being connected with outer computer.
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| CN201210521414.XA CN103021238B (en) | 2012-12-07 | 2012-12-07 | Digital static tester |
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| CN201210521414.XA CN103021238B (en) | 2012-12-07 | 2012-12-07 | Digital static tester |
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| CN108806432A (en) * | 2018-06-25 | 2018-11-13 | 江苏苏威尔科技有限公司 | A kind of high-pressure electrostatic experiment external member and its application method |
| CN109323133A (en) * | 2018-12-04 | 2019-02-12 | 济南市长清计算机应用公司 | A kind of adjustable fuel gas acousto-optic leak detector of sensitivity and the method for judging combustible gas leakage point |
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| CN107591067A (en) * | 2016-07-06 | 2018-01-16 | 陈强 | Electrometer for middle school's electrostatic experiment |
| CN108806432A (en) * | 2018-06-25 | 2018-11-13 | 江苏苏威尔科技有限公司 | A kind of high-pressure electrostatic experiment external member and its application method |
| CN109323133A (en) * | 2018-12-04 | 2019-02-12 | 济南市长清计算机应用公司 | A kind of adjustable fuel gas acousto-optic leak detector of sensitivity and the method for judging combustible gas leakage point |
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| CN103021238B (en) | 2014-10-08 |
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