CN103399189A - Multifunctional alternating current circuit parameter test and feature demonstrating device - Google Patents
Multifunctional alternating current circuit parameter test and feature demonstrating device Download PDFInfo
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- CN103399189A CN103399189A CN2013103168724A CN201310316872A CN103399189A CN 103399189 A CN103399189 A CN 103399189A CN 2013103168724 A CN2013103168724 A CN 2013103168724A CN 201310316872 A CN201310316872 A CN 201310316872A CN 103399189 A CN103399189 A CN 103399189A
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Abstract
The invention discloses a multifunctional alternating current circuit parameter test and feature demonstrating device, comprising a test part and a demonstrating part. The multifunctional alternating current circuit parameter test and feature demonstrating device is characterized in that the test part comprises a control module, the control module is electrically connected with a frequency synthesizer, a keyboard and a display device, and the frequency synthesizer is electrically connected with two rectifier filtering circuit modules, an adjustable capacitor module and a load; an amplifier circuit module is arranged between the frequency synthesizer and one of the rectifier filtering circuit modules; the adjustable capacitor module is connected with the load, the load is connected with an oscillator, and the oscillator is electrically connected with the control module. The multifunctional alternating current circuit parameter test and feature demonstrating device not only can judge the feature of the whole load and test the circuit equivalent parameter of the circuit, but also can be used as an RLC component tester, an alternating current parameter tester and a common sine alternating current source, and besides, the device also can be used an experimental device and used for demonstrating the feature that the impedance of an alternating current circuit changes along with the frequency of a signal source and the features such as the circuit resonance.
Description
Technical field
The present invention relates to a kind of Multifunction AC circuit parameter testing and characteristic demonstration device.
Background technology
In alternating circuit, the impedance of circuit no longer shows as simple Ohm law relation in DC circuit, and often show as series, parallel or the resulting equiva lent impedance of series-parallel connection of certain resistance R, capacitor C, inductance L, and impedance will change along with the frequency change of signal source.The quick characteristic of obtaining exactly load and equivalent parameters thereof have Special Significance to the analysis of circuit and design etc.Existing tester is to the parameter measurement such as resistance, inductance, electric capacity with to alternating voltage, current effective value, frequency, power, power factor (PF), and the measurement of the alternating current parameter such as electric current and voltage phase differential is also comparatively commonly used in Practical Project, and the characteristics such as resonance of inquiring into alternating circuit are also significant.
But, existing instrument only possesses RLC parameter testing or alternating current parameter test function mostly, can't be directly used in the characteristic of the whole load of judgement and measure its circuit equivalent parameter, can't be directly used in the characteristics such as illustrative circuitry resonance, circuit comparatively complexity and computational accuracy also remains further to be improved.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned defect, a kind of Multifunction AC circuit parameter testing and characteristic demonstration device are provided, can judge the characteristic of whole load and measure its circuit equivalent parameter, can use as RLC component testing instrument, alternating current parameter tester and common simple alternating current source again, simultaneously, can also be as experimental provision, the impedance of demonstration alternating circuit is along with characteristics such as signal source frequency variation and circuit resonance.
For addressing the above problem, the technical solution adopted in the present invention is:
A kind of Multifunction AC circuit parameter testing and characteristic demonstration device, comprise part of detecting and demonstration part, it is characterized in that: described part of detecting comprises control module, control module is electrically connected with frequency synthesizer, keyboard, display device, and described frequency synthesizer is electrically connected to two current rectifying and wave filtering circuit modules, tunable capacitor module and loads; Be provided with the amplifying circuit module between described frequency synthesizer and one of them current rectifying and wave filtering circuit module; Described tunable capacitor module is connected with load, and load is connected with oscillator, and oscillator is electrically connected to control module.
As a kind of improvement, described frequency synthesizer is electrically connected with sampling resistor and fixed value resistance.
As a kind of improvement, described oscillator comprises RC oscillator and RL oscillator.
As a kind of improvement, described control module is single-chip microcomputer.
As a kind of improvement, described sampling resistor is the copper-manganese resistance of little resistance, and the current conversion that is used for load is produced is voltage signal, then sends into the amplifying circuit module.
As a kind of improvement, described amplifying circuit module is used for the small signals amplification that will collect, and then sends into the current rectifying and wave filtering circuit module, is convenient to single-chip microcomputer and receives identification.
As a kind of improvement, described controllable impedance L forms the RL oscillator in conjunction with VCO chip 1648, and the signal frequency that the RL oscillator produces is sent into single-chip microcomputer identification, and then determines the inductance value of place in circuit; Described controllable impedance L is special two controllable impedances.Described tunable capacitor C is in conjunction with 555 timing circuit module composition RC oscillators, and the signal frequency that produces is sent into single-chip microcomputer identification, and then determines the capacitance of place in circuit.Described tunable capacitor C is special two tunable capacitors.
As a kind of improvement, described display device is display screen.
Owing to having adopted technique scheme, compared with prior art, the present invention can obtain characteristic and the equivalent parameters thereof of load circuit exactly, and the analysis of circuit and design etc. are acquired a special sense, and also can be used as the RLC measuring instrument and uses; Remove the signal source part that DDS forms, simply add bleeder circuit, namely can be used as AC parameter measuring instrument and use, thereby settling signal voltage, current effective value, active power, reactive power, applied power, power factor (PF), the measurement of the electrical quantitys such as electric current and voltage phase differential, frequency; Can, as the impedance of experimental provision illustrative circuitry along with characteristics such as signal source frequency variation and circuit resonance, deepen the understanding of student to the alternating circuit characteristic; Simultaneously, can also allow student oneself carry out Single Chip Microcomputer (SCM) program and design above-mentioned correlation function, reach the student multi-door professional knowledge can be connected, study in order to practise, improve the purpose of its innovation ability.
Can realize the equivalent circuit parameter of judgement and the acquisition load of load characteristic on function of the present invention, can use as the RLC tester, also can test the electrical quantity of AC signal, use as AC parameter measuring instrument, simultaneously, the present invention can demonstrate the alternating circuit impedance with key properties such as frequency change and circuit resonance as experimental apparatus, can also use as the sinusoidal ac signal generator in addition, gather multi-function in integral whole, measure acquired results and intuitively show on liquid crystal display.
The invention will be further described below in conjunction with the drawings and specific embodiments simultaneously.
Description of drawings
Fig. 1 is the theory diagram of an embodiment of the present invention;
Fig. 2 is the circuit diagram of amplifying circuit module in an embodiment of the present invention;
Fig. 3 is the circuit diagram of current rectifying and wave filtering circuit module in an embodiment of the present invention;
Fig. 4 is the circuit theory diagrams of mode of operation one in an embodiment of the present invention;
Fig. 5 is the circuit theory diagrams of mode of operation two in an embodiment of the present invention;
Fig. 6 is the circuit theory diagrams of mode of operation three in an embodiment of the present invention.
Embodiment
Embodiment:
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of Multifunction AC circuit parameter testing and characteristic demonstration device, comprise control module, control module is electrically connected with frequency synthesizer, keyboard, display device, and described frequency synthesizer is electrically connected to two current rectifying and wave filtering circuit modules, tunable capacitor module and loads.Be provided with the amplifying circuit module between described frequency synthesizer and one of them current rectifying and wave filtering circuit module.Described tunable capacitor module and load are electrically connected with the RL oscillator jointly, and the RL oscillator is electrically connected to control module.
In the present embodiment, described frequency synthesizer is electrically connected with sampling resistor and fixed value resistance.Be provided with the controllable impedance module in described RL oscillator.Described control module is single-chip microcomputer.Described sampling resistor is the copper-manganese resistance of little resistance, and the current conversion that is used for load is produced is voltage signal, then sends into the amplifying circuit module.
Described amplifying circuit module is used for the small signals amplification that will collect, and then sends into the current rectifying and wave filtering circuit module, is convenient to single-chip microcomputer and receives identification.
Described RL oscillator is that controllable impedance L forms the RL oscillator in conjunction with VCO chip 1648, and the signal frequency that the RL oscillator produces is sent into single-chip microcomputer identification, and then determines the inductance value of place in circuit; Described controllable impedance L is special two controllable impedances.In addition, described display device is display screen.
Have the selection of four kinds of mode of operations on keyboard, and frequency, the initial phase of the sinusoidal signal that produces are intended in input.Above-mentionedly all be based on major function target of the present invention, except being specifically designed to, produce the sinusoidal ac signal function, for simplicity, can at first phase place be made as definite value, and directly the incoming frequency parameter gets final product.
Be illustrated in figure 4 as the circuit theory diagrams of mode of operation one, the judgement load characteristic is also measured its equivalent circuit parameter.
Frequency synthesizer output is connected to respectively A, B two ends, and C, 2 of D connect load ZL two ends, the switch of closed tunable capacitor C branch road.Select mode of operation one by keyboard, and input intends producing the frequency f of sinusoidal signal
0, then twist tunable capacitor C knob, can be in liquid crystal display the read test result, i.e. the characteristic of load, equivalent circuit parameter and equiva lent impedance.
In mode of operation one, by keyboard, key in incoming frequency f
0The time, after single-chip microcomputer (MCU) identification, (DDS) sends control signal to frequency synthesizer, and requiring it first to produce frequency is f
0The sinusoidal signal of-1Hz, the excitation load.After result was stable, single-chip microcomputer (MCU) controlled frequency compositor (DDS) produced frequency f
0Signal excitation load, again complete above-mentioned calculating process; Single-chip microcomputer (MCU) controlled frequency compositor (DDS) produces frequency f after measured result is stable
0The signal excitation load of+1Hz, complete same calculating process again; After stable testing, single-chip microcomputer (MCU) is averaged the circuit equivalent parameter of measuring gained for 3 times as the final circuit equivalent parameter of load, to export in liquid crystal display afterwards.
Be illustrated in figure 5 as the circuit theory diagrams of mode of operation two, measure alternating current parameter.
A, B two ends are connected to respectively A1, the B1 two ends of resistor voltage divider network, directly from IN end input sinusoidal ac signal, the switch of closed tunable capacitor C branch road.Then, select mode of operation two on keyboard, just can directly read the alternating current parameters such as voltage, current effective value, active power, reactive power, applied power, power factor (PF), signal frequency and electric current and voltage phase differential in liquid crystal display.Under this mode of operation, final test result is also be averaged after three computings and export net result.
Be illustrated in figure 6 as the circuit theory diagrams of mode of operation three, illustrative circuitry resonance.
After passing through a pair of load testing of mode of operation, while being shown as " inductive " or " capacitive character " in test result, can be by the changing-over circuit to corresponding circuit resonance demo mode.If pattern one test result shows " inductive ", one connection of circuit Holdover mode is constant, the illustrative circuitry parallel resonance.If result shows " capacitive character ", need disconnect the switch of tunable capacitor branch road, and controllable impedance is sealed in circuit, the illustrative circuitry series resonance, then keyboard is selected illustrative circuitry resonance mode of operation.Under this mode of operation, two kinds of demonstration modes are arranged: the first, frequency remains pattern one setting, adjusts the value of electric capacity (inductance), can be on liquid crystal the current value I, resulting impedance Z and the resonance situation (" parallel resonance " or " series resonance ") of circuit of display measurement gained.It two is, keeps inductance (electric capacity) value of place in circuit, then keys in new signal frequency (being the resonance frequency under this parameter), also can reach the purpose of illustrative circuitry resonance characteristic.To the known load of impedance, can be according to similar method demonstration resonance characteristic.
Mode of operation four, use as the simple alternating current source.
Select mode of operation four on keyboard, do not connect subsequent conditioning circuit,, directly from the two ends output of frequency synthesizer, can be met frequency that keyboard inputs and the sinusoidal ac signal of phase condition.
The present invention can obtain characteristic and the equivalent parameters thereof of load circuit exactly, and the analysis of circuit and design etc. are acquired a special sense, and also can be used as the RLC measuring instrument and uses; Remove the signal source part that DDS forms, simply add bleeder circuit, namely can be used as AC parameter measuring instrument and use, thereby settling signal voltage, current effective value, active power, reactive power, applied power, power factor (PF), the measurement of the electrical quantitys such as electric current and voltage phase differential, frequency; Can, as the impedance of experimental provision illustrative circuitry along with characteristics such as signal source frequency variation and circuit resonance, deepen the understanding of student to the alternating circuit characteristic; Simultaneously, can also allow student oneself carry out Single Chip Microcomputer (SCM) program and design above-mentioned correlation function, reach the student multi-door professional knowledge can be connected, study in order to practise, improve the purpose of its innovation ability.
In addition, can realize the equivalent circuit parameter of judgement and the acquisition load of load characteristic on function of the present invention, can use as the RLC tester, also can test the electrical quantity of AC signal, as AC parameter measuring instrument, use.
The present invention can demonstrate the alternating circuit impedance with key properties such as frequency change and circuit resonance as experimental apparatus, can also use as the sinusoidal ac signal generator in addition, gathers multi-function in integral whole, and measures acquired results and intuitively shows on liquid crystal display.
The present invention is not limited to above-mentioned preferred implementation, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or akin technical scheme with the present invention, all belongs to protection scope of the present invention.
Claims (9)
1. a Multifunction AC circuit parameter testing and characteristic demonstration device, it is characterized in that: comprise control module, control module is electrically connected with frequency synthesizer, keyboard, display device, and described frequency synthesizer is electrically connected to two current rectifying and wave filtering circuit modules, tunable capacitor module and loads; Be provided with the amplifying circuit module between described frequency synthesizer and one of them current rectifying and wave filtering circuit module; Described tunable capacitor module is connected with load, and load is connected with oscillator, and oscillator is electrically connected to control module.
2. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 1, it is characterized in that: described frequency synthesizer is electrically connected with sampling resistor and fixed value resistance.
3. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 2, it is characterized in that: described oscillator comprises RC oscillator and RL oscillator.
4. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 3, it is characterized in that: described control module is single-chip microcomputer.
5. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 3, it is characterized in that: described sampling resistor is the copper-manganese resistance of little resistance, the current conversion that is used for load is produced is voltage signal, then sends into the amplifying circuit module.
6. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 3, it is characterized in that: described amplifying circuit module is used for the small signals amplification that will collect, and then send into the current rectifying and wave filtering circuit module, be convenient to single-chip microcomputer and receive identification.
7. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 3, it is characterized in that: described controllable impedance L forms the RL oscillator in conjunction with VCO chip 1648, the signal frequency that the RL oscillator produces is sent into single-chip microcomputer identification, and then determines the inductance value of place in circuit; Described controllable impedance L is two controllable impedances.
8. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 7, it is characterized in that: described tunable capacitor C is in conjunction with 555 timing circuit module composition RC oscillators, the signal frequency that produces is sent into single-chip microcomputer identification, and then determines the capacitance of place in circuit; Described tunable capacitor C is the tunable capacitor module.
9. Multifunction AC circuit parameter testing and the characteristic demonstration device described according to claim 1, it is characterized in that: described display device is display screen.
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| CN201310316872.4A CN103399189B (en) | 2013-07-25 | 2013-07-25 | A kind of Multifunction AC circuit parameter testing and characteristic demonstration device |
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| CN201310316872.4A CN103399189B (en) | 2013-07-25 | 2013-07-25 | A kind of Multifunction AC circuit parameter testing and characteristic demonstration device |
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| CN103399189B CN103399189B (en) | 2016-03-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199285A (en) * | 2016-08-20 | 2016-12-07 | 福州大学 | The arbitrarily capacitance characteristic under AC carrier measures equipment and measuring method thereof |
| CN110568318A (en) * | 2019-10-22 | 2019-12-13 | 南昌航空大学 | Line load and fault detection device and method |
| CN110726893A (en) * | 2019-11-11 | 2020-01-24 | 河海大学常州校区 | Automatic detection device and detection method for line fault and load |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102187A (en) * | 1986-04-01 | 1987-10-21 | 湖北省计量测试研究所 | High frequency inducdtance and capacitance measuring instrument |
| CN101452022A (en) * | 2008-12-26 | 2009-06-10 | 华东师范大学 | Measuring device for inductance value of printing inductor |
| CN202534234U (en) * | 2012-04-13 | 2012-11-14 | 江南大学 | Resonance method inductance measurement experimental instrument |
| CN202855149U (en) * | 2012-08-03 | 2013-04-03 | 湖州文思必得科教仪器有限公司 | Frequency conversion sine AC characteristic demonstration device |
| CN202939886U (en) * | 2012-11-28 | 2013-05-15 | 成都捷康特科技有限公司 | Simple capacitance and inductance measurement teaching instrument |
-
2013
- 2013-07-25 CN CN201310316872.4A patent/CN103399189B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86102187A (en) * | 1986-04-01 | 1987-10-21 | 湖北省计量测试研究所 | High frequency inducdtance and capacitance measuring instrument |
| CN101452022A (en) * | 2008-12-26 | 2009-06-10 | 华东师范大学 | Measuring device for inductance value of printing inductor |
| CN202534234U (en) * | 2012-04-13 | 2012-11-14 | 江南大学 | Resonance method inductance measurement experimental instrument |
| CN202855149U (en) * | 2012-08-03 | 2013-04-03 | 湖州文思必得科教仪器有限公司 | Frequency conversion sine AC characteristic demonstration device |
| CN202939886U (en) * | 2012-11-28 | 2013-05-15 | 成都捷康特科技有限公司 | Simple capacitance and inductance measurement teaching instrument |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199285A (en) * | 2016-08-20 | 2016-12-07 | 福州大学 | The arbitrarily capacitance characteristic under AC carrier measures equipment and measuring method thereof |
| CN106199285B (en) * | 2016-08-20 | 2023-05-16 | 福州大学 | Capacitance characteristic measuring equipment and method under any alternating current carrier |
| CN110568318A (en) * | 2019-10-22 | 2019-12-13 | 南昌航空大学 | Line load and fault detection device and method |
| CN110726893A (en) * | 2019-11-11 | 2020-01-24 | 河海大学常州校区 | Automatic detection device and detection method for line fault and load |
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