CN208432646U - A kind of repetition pulse generating device based on direct digital frequency synthesis technology - Google Patents
A kind of repetition pulse generating device based on direct digital frequency synthesis technology Download PDFInfo
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- CN208432646U CN208432646U CN201820863545.9U CN201820863545U CN208432646U CN 208432646 U CN208432646 U CN 208432646U CN 201820863545 U CN201820863545 U CN 201820863545U CN 208432646 U CN208432646 U CN 208432646U
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Abstract
The utility model discloses a kind of repetition pulse generating device based on direct digital frequency synthesis technology, including shell, power module, protection location, impulse generating unit, connector, display, control button, switch, power input interface and waveform output interface；Impulse generating unit includes control module, DDS chip and low-pass filtering amplification module.The utility model is simple and reliable for structure, small in size, light-weight, by the way that protection location is added, can effectively remove DC influence, stablize output pulse signal, avoid influencing each other with external pulse signal.
Description
Technical field
The utility model belongs to Electric Power Equipment Insulation detection technique and its application field, is related to a kind of based on Direct Digital frequency
The repetition pulse generating device of rate synthetic technology.
Background technique
Currently when being detected to breaker coil, failure can generally be detected using repetition pulse method, be considered
Fault type into coil includes that capacitive short circuit, resistive shorts and perception short circuit etc. are a variety of, the spy that every kind of fault type generates
It is related with the frequency of pulse signal, amplitude, phase and generation interval to levy waveform.In order to detect the most apparent feature of fault message
Waveform needs a kind of repetition pulse generating device for capableing of flexible modulation items waveform parameter.Common repetition pulse fills
There are mainly two types of setting: first is that generating respective waveforms using bidirectional trigger diode pulse, but such method needs to build hardware electricity
Road, circuit is complex and generated waveform is vulnerable to equipment parameters affect；Second is that DAC digital waveform production method, such method
It is complex to adjust waveform parameter.
Patent No. CN201120272029.7 discloses a kind of DDS signal generator, which can export
Sine wave, square wave, the triangular wave of different frequency, high, low in energy consumption, output frequency signal Phase Continuation, frequency with frequency resolution
The advantages that rate conversion time is short；But in use, being flowed back into signal generator by pulse signal is influenced, the arteries and veins of output
Rush signal be finally cut in and signal generator in there is a problem of direct current signal interference and output signal it is unstable.
Summary of the invention
The utility model in view of the deficiencies of the prior art, proposes that one kind can effectively remove DC influence, stablizes output arteries and veins
Signal is rushed, avoids filling with the interactional repetition pulse based on direct digital frequency synthesis technology of external pulse signal
It sets.
To achieve the goals above, the utility model uses following technical scheme:
A kind of repetition pulse generating device based on direct digital frequency synthesis technology, including shell, display and control
Key；Power module, protection location and impulse generating unit are installed in the shell；The back side of shell two sides installation
There is connector；Switch, power input interface and waveform output interface are installed on the shell；The display and control
Key is separately mounted on shell；
The impulse generating unit includes control module, DDS chip and low-pass filtering amplification module；The control is pressed
Key, display are electrically connected with control module respectively；The DDS chip is electrically connected with control module, the output end of DDS chip with
The input terminal of the low-pass filtering amplification module is connected；The output end of the low-pass filtering amplification module and the protection
The input terminal of unit is connected；The output end of protection location is connected with waveform output interface；The display, control module, DDS
Chip, low-pass filtering amplification module, protection location are electrically connected with the power module respectively；The power input jack with
The power module is electrically connected；The switch is connected on the section lead between power input jack and power module.
As further technological improvement, the protection location is mainly made of protection circuit；The protection circuit
Including voltage follower N, diode D1, Zener diode D2, diode D3, capacitor C, resistance R1 and resistance R2；The electricity
First pin of pressure follower is connected with the output end of low pass amplifying circuit, the third pin of voltage follower N and two pole of Zener
One end of pipe D2, DC power cathode connection, the other end of Zener diode D2 and the 5th pin, the direct current of voltage follower N
Positive pole connection, the 4th pin of voltage follower N are connected with one end of diode D1, the other end and capacitor of diode D1
One end of C, the second pin of voltage follower N are connected, the other end and one end of resistance R1, one end phase of resistance R2 of capacitor C
Even, the other end of resistance R1 is connected to the ground, and the other end of resistance R2 is connected with one end of diode D3, and diode D3's is another
End is connected with waveform output interface.
As further technological improvement, the power module is mainly made of miniature transformer.
As further technological improvement, the control module is mainly made of control circuit；The control circuit
On be integrated with single-chip microcontroller.
As further technological improvement, the DDS chip is AD9102 chip.Select AD9102 chip, the chip
Integrated Direct Digital Frequency Synthesizers (DDS), can be used for the generation of complicated wave form.
As further technological improvement, the waveform output interface is bnc interface.Waveform output interface selects BNC
Interface is connected in the detection of breaker coil short trouble with coaxial cable, output waveform to test equipment.
As further technological improvement, the connector is made into using rigid material.
Working principle of the utility model is:
The utility model is by the phase of control button pulse waveform regulated, amplitude, frequency and generates interval, wave when adjusting
The parameter value of shape can show that the parameter after control module is adjusted according to key later gives DDS chip respectively in the display
It controls register write-in frequency control word, phase control words, amplitude control word and generates Separation control word；Control in DDS chip
Above-mentioned control word is sent into the conversion circuit of chip interior by register processed, and conversion circuit exports corresponding waveform number according to control word
According to；After last low-pass filtered amplification module filters out interference and carries out secondary amplification, i.e., waveform is converted into required simulation
Waveform, and exported from waveform output interface；Protection location can remove DC influence signal and stable mode in output waveform
Quasi- signal and the operation for preventing external pulse effect of signals pulse generating unit；Connector can be in order to consolidating pulse generating unit
Get up calmly, power input interface can be convenient pulse generating unit connection power supply；Switch can control opening for pulse generating unit
It closes；Power module can produce the direct current and alternating current of multiple groups different voltages value, for pulse generating unit use；Low-pass filtering
Amplification module carries out the secondary amplification of amplitude for filtering out high-frequency interferencing signal；Although the control register of DDS chip can be with
Change the size of waveforms amplitude, but regulating power is limited, output amplitude is up to 3.3V, and low-pass filtering amplification module can be secondary
Amplify amplitude, amplification factor is 10 times, cutoff frequency 30MHz.
Compared with prior art, the utility model have the utility model has the advantages that
1. the utility model can effectively remove DC influence, stablize output pulse signal, keep away by the way that protection location is added
Exempt to influence each other with external pulse signal.
2. the control word of parameters, realization pair are written by microprocessor to the control register of DDS for the utility model
Impulse waveform amplitude, phase, frequency and the adjustment for generating interval are conducive to generate the most apparent signature waveform of fault message, more
Accurately assess breaker coil turn-to-turn insulation state.
3. the utility model is simple and reliable for structure, small in size, light-weight, it is suitble to participate in detection line under various applications
Enclose shorted-turn fault.
Detailed description of the invention
Fig. 1 is the systematic schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of the utility model.
Fig. 3 is the schematic diagram of internal structure of shell in the utility model.
Fig. 4 is the circuit diagram that circuit is protected in the utility model.
Appended drawing reference: 1- connector, 2- switch, 3- display, 4- shell, 5- power input jack, the output of 6- waveform connect
Mouthful, 7- control button, 8- power module, 9- protection location, 10- impulse generating unit.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Embodiment 1:
A kind of repetition pulse generating device based on direct digital frequency synthesis technology, including shell 4, display 3 and control
Key 7 processed；Power module 8, protection location 9 and impulse generating unit 10 are installed in the shell 4；The shell 4 is carried on the back
Face two sides are equipped with connector 1；Switch 2, power input interface and waveform output interface 6 are installed on the shell 4；It is described
Display 3 and control button 7 be separately mounted on shell 4；
The impulse generating unit 10 includes control module, DDS chip and low-pass filtering amplification module；The control
Key 7, display 3 are electrically connected with control module respectively；The DDS chip is electrically connected with control module, DDS chip it is defeated
Outlet is connected with the input terminal of the low-pass filtering amplification module；The output end of the low-pass filtering amplification module with it is described
Protection location 9 input terminal be connected；The output end of protection location 9 is connected with waveform output interface 6；The display 3, control
Molding block, DDS chip, low-pass filtering amplification module, protection location 9 are electrically connected with the power module 8 respectively；The electricity
Source input socket 5 is electrically connected with the power module 8；The switch 2 is connected to power input jack 5 and power module 8
Between a section lead on.
The protection location 9 is mainly made of protection circuit；The protection circuit includes voltage follower N, two poles
Pipe D1, Zener diode D2, diode D3, capacitor C, resistance R1 and resistance R2；First pin of the voltage follower with
The output end of low pass amplifying circuit is connected, and the third pin and one end of Zener diode D2, DC power supply of voltage follower N is born
Pole connection, the other end of Zener diode D2 are connect with the 5th pin, the DC power anode of voltage follower N, voltage follow
The 4th pin of device N is connected with one end of diode D1, the other end of diode D1 and one end, the voltage follower N of capacitor C
Second pin be connected, the other end of capacitor C is connected with one end of one end of resistance R1, resistance R2, the other end of resistance R1 and
Ground is connected, and the other end of resistance R2 is connected with one end of diode D3, the other end and 6 phase of waveform output interface of diode D3
Even.
The power module 8 is mainly made of miniature transformer.
The control module is mainly made of control circuit；Single-chip microcontroller is integrated in the control circuit.
The DDS chip is AD9102 chip.Select AD9102 chip, the integrated chip Direct Digital Frequency Synthesizers
(DDS), it can be used for the generation of complicated wave form；
The waveform output interface 6 is bnc interface.Waveform output interface 6 selects bnc interface, short in breaker coil
It is connected when the fault detection of road with coaxial cable, output waveform to test equipment.
The connector 1 is made into using rigid material.
The working principle of the embodiment:
The utility model is by the phase of 7 pulse waveform regulated of control button, amplitude, frequency and generates interval, when adjusting
The parameter value of waveform can show that the parameter after control module is adjusted according to key later gives DDS chip respectively in display 3
Control register write-in frequency control word, phase control words, amplitude control word and generate Separation control word；In DDS chip
The conversion circuit that above-mentioned control word is sent into chip interior by register is controlled, conversion circuit exports corresponding waveform according to control word
Data；After last low-pass filtered amplification module filters out interference and carries out secondary amplification, i.e., waveform is converted into required mould
Quasi- waveform, and exported from waveform output interface 6；Protection location 9 can remove the DC influence signal in output waveform, Yi Jiwen
Determine analog signal and prevents the operation of external signal influence pulse generating unit；Connector 1 can be in order to by pulse generating unit
It is fixed up, power input interface can be convenient pulse generating unit connection power supply；Switch 2 can control pulse generating unit
Opening and closing；Power module 8 can produce the direct current and alternating current of multiple groups different voltages value, for pulse generating unit use；Low pass
Filter and amplification module carries out the secondary amplification of amplitude for filtering out high-frequency interferencing signal；Although the control register of DDS chip
It can change the size of waveforms amplitude, but regulating power is limited, output amplitude is up to 3.3V, and low-pass filtering amplification module can be with
Secondary amplification amplitude, amplification factor are 10 times, cutoff frequency 30MHz.
Claims (6)
1. a kind of repetition pulse generating device based on direct digital frequency synthesis technology, it is characterised in that: including shell (4),
Display (3) and control button (7)；Power module (8), protection location (9) and pulse generation are installed in the shell (4)
Unit (10)；Described shell (4) back side two sides are equipped with connector (1)；Switch (2), electricity are installed on the shell (4)
Source input socket (5) and waveform output interface (6)；The display (3) and control button (7) is separately mounted to shell (4)
On；
The impulse generating unit (10) includes control module, DDS chip and low-pass filtering amplification module；The control is pressed
Key (7), display (3) are electrically connected with control module respectively；The DDS chip is electrically connected with control module, DDS chip it is defeated
Outlet is connected with the input terminal of the low-pass filtering amplification module；The output end of the low-pass filtering amplification module with it is described
Protection location (9) input terminal be connected；The output end of protection location (9) is connected with waveform output interface (6)；The display
Device (3), control module, DDS chip, low-pass filtering amplification module, protection location (9) are electric with the power module (8) respectively
It is connected；The power input jack (5) is electrically connected with the power module (8)；It is defeated that the switch (2) is connected to power supply
Enter on the section lead between socket (5) and power module (8).
2. a kind of repetition pulse generating device based on direct digital frequency synthesis technology according to claim 1, special
Sign is: the protection location (9) is mainly made of protection circuit；The protection circuit includes voltage follower N, two poles
Pipe D1, Zener diode D2, diode D3, capacitor C, resistance R1 and resistance R2；First pin of the voltage follower with
The output end of low pass amplifying circuit is connected, and the third pin and one end of Zener diode D2, DC power supply of voltage follower N is born
Pole connection, the other end of Zener diode D2 are connect with the 5th pin, the DC power anode of voltage follower N, voltage follow
The 4th pin of device N is connected with one end of diode D1, one end of the other end of diode D1 and capacitor C, voltage follower N
Second pin is connected, and the other end of capacitor C is connected with one end of one end of resistance R1, resistance R2, the other end and ground of resistance R1
It is connected, the other end of resistance R2 is connected with one end of diode D3, the other end and waveform output interface (6) phase of diode D3
Even.
3. a kind of repetition pulse generating device based on direct digital frequency synthesis technology according to claim 1, special
Sign is: the power module (8) is mainly made of miniature transformer.
4. a kind of repetition pulse generating device based on direct digital frequency synthesis technology according to claim 1, special
Sign is: the control module is mainly made of control circuit；Single-chip microcontroller is integrated in the control circuit.
5. a kind of repetition pulse generating device based on direct digital frequency synthesis technology according to claim 1, special
Sign is: the DDS chip is AD9102 chip.
6. a kind of repetition pulse generating device based on direct digital frequency synthesis technology according to claim 1, special
Sign is: the waveform output interface (6) is bnc interface.
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| CN201820863545.9U CN208432646U (en) | 2018-06-05 | 2018-06-05 | A kind of repetition pulse generating device based on direct digital frequency synthesis technology |
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| CN201820863545.9U CN208432646U (en) | 2018-06-05 | 2018-06-05 | A kind of repetition pulse generating device based on direct digital frequency synthesis technology |
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| CN208432646U true CN208432646U (en) | 2019-01-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697948A (en) * | 2020-08-14 | 2020-09-22 | 南京盛普仪器科技有限公司 | Digital synthesis high-frequency standard signal generator |
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2018
- 2018-06-05 CN CN201820863545.9U patent/CN208432646U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697948A (en) * | 2020-08-14 | 2020-09-22 | 南京盛普仪器科技有限公司 | Digital synthesis high-frequency standard signal generator |
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