CN202127386U - High-voltage parameter-adjustable nanosecond electric pulse generator based on photoconductive switch - Google Patents
High-voltage parameter-adjustable nanosecond electric pulse generator based on photoconductive switch Download PDFInfo
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- CN202127386U CN202127386U CN2011202139542U CN201120213954U CN202127386U CN 202127386 U CN202127386 U CN 202127386U CN 2011202139542 U CN2011202139542 U CN 2011202139542U CN 201120213954 U CN201120213954 U CN 201120213954U CN 202127386 U CN202127386 U CN 202127386U
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Abstract
The utility model discloses a high-voltage parameter-adjustable nanosecond electric pulse generator based on a photoconductive switch. The high-voltage parameter-adjustable nanosecond electric pulse generator is characterized in that the high-voltage parameter-adjustable nanosecond electric pulse generator comprises an optoelectronic relay subsystem, a pulse diode optical power adjusting subsystem, a high-voltage charging power supply subsystem, a capacitance energy-storing subsystem, a photoconductive switch discharging subsystem and a load application subsystem, wherein a laser pulse diode in the pulse diode optical power regulating subsystem is connected with a core device photoconductive switch in the capacitance energy-storing subsystem. The high-voltage parameter-adjustable nanosecond electric pulse generator has the beneficial effects that the service life of the photoconductive switch is prolonged; residual electric field of the photoconductive switch subjected to illumination is reduced by full conduction of the photoconductive switch and full discharge of a capacitor; when the photoconductive switch is dark, secondary conduction is not caused due to a negative differential effect of GaAs, so that the thermal breakdown rate of the photoconductive switch is reduced, and the service life of the GaAs photoconductive switch is prolonged to millions of times from tens of times.
Description
Technical field
The utility model relates to a kind of adjustable high pressure of parameter nanosecond electric pulse generator based on photoconductive switch.
Background technology
High pressure nanosecond, electric pulse generator can classify by output voltage height, pulse duration length, repetition frequency range and the kind of opening the light.Most of electric pulse generator output voltages are lower than 5kV, and the electric field that causes acting on load is low and in load, present more weak galvanomagnetic effect.The pulse duration of general electric pulse generator output is more than hundreds of nanoseconds so that reach microsecond, does not reach desirable aerial radiation effect or Treatment Effects in the needed cells in field such as medical treatment, agricultural occurred not.From repetition rate, in order to satisfy military needs, pulse repetition frequency very high (10kHz) does not have manual usually; High repetition frequency causes the overheated death of cell easily; The apoptosis of tumor cells response that expectation occurs does not perhaps have the appearance of the somatomedin of agricultural field expectation. the withstand voltage height of arrester switch; The pulse duration that produces is little; But switch life is short owing to the ablation of metal electrode, and is simultaneously bulky.Connection in series-parallel MOSFET and IGBT switch protection complicated circuit are easy to burn, and the life-span is short.The magnetic saturation material of the pulse generator of based semiconductor cut-off switch and magnetic saturation transformer is in advanced development, and is immature, and expensive.
In view of this, this high pressure nanosecond electric pulse generator utilize photoconductive switch produce voltage up to 5-10 kilovolt, pulse duration in hundreds of psecs between hundreds of nanoseconds and electric pulse with certain repetition rate.Characteristic such as the photoconductive switch of this electric pulse generator has static withstand voltage height, volume is little, the life-span is long and price is low.Pulsed laser diode replaces comparatively huge laser to produce laser; Laser light energy and capacitance energy storage are cooperated; Be devoted to the controllability of electric pulse parameter and the high usage of photoconductive switch, can be used for fields such as military affairs, medical treatment, agricultural, be national defense safety and human beings'health service.
The utility model content
The goal of the invention of the utility model is: the problem to above-mentioned existence, a kind of adjustable high pressure of parameter nanosecond electric pulse generator based on photoconductive switch is provided, and these innovation and creation comprise core devices: photoconductive switch.As shown in Figure 1, the energy storage of at first serial sized capacitors device cooperates with adjustable laser energy, makes the photoconductive switch conducting good, obtains the high pressure nanosecond electric pulse of different amplitudes and different pulse durations.The luminous power of laser diode is followed successively by 50,75,150 and 200W, is designated as P1, P2, P3, P4 fourth gear.Among closed S1, S2, S3, four switches of S4 one, corresponding electric capacity (withstand voltage 20 kV) be 30,45,90 and 120PF corresponding, be C1, C2, C3 and C4 shelves among the figure.Like this being combined as of the energy of photoconductive switch and storage capacitor (P1, C1), (P2, C2), (P3, C3) with (P4, C4).Usually, the storage capacitor in the high pressure nanosecond generator is the electric capacity of single Blumlein transmission line, and area is big, and electric capacity is difficult for regulating and changes.
Pulsed laser diode has replaced laser bulky, difficult in maintenance.Pulse diode circuit volume is little, easy to maintenance, and laser power can regulate drive current and pulse duration realizes.The electric pulse generator volume that this electric pulse generator volume triggers than the YAG laser has reduced over half, increases the convenience that carries.
Pulse amplitude, pulse duration and repetition rate can be regulated, and have increased the kind of load.Usually, with the military ultra-wideband antenna of high pressure nanosecond electric pulse feed-in.This invention is except the driving source of making ultra-wideband antenna; The electric pulse that produces can directly act on tumour cell or the tissue in the medical treatment; Increase the apoptosis percentage of tumour cell; Also can act on the plant that the spore suspension in agricultural field, no earth culture support and the round log of mushroom growth, improve the output of mushroom and crops.
New position relation:
High pressure nanosecond, electric pulse generator constituted: photoelectricity delayer subsystem, pulse diode optical power conditioning subsystem, high voltage charging power supply, capacitance energy storage subsystem and photoconductive switch discharge subsystem and load applications subsystem.
Photoelectricity delayer subsystem by repetition rate control (containing single triggers) button, 555 timers, time-delay regulate button, amplification circuit of electrical signal is formed, being respectively the miniaturization high voltage charging power supply provides the charging signals of time-delay and triggering signal is provided for the pulsed illumination diode drive circuit.
The high voltage charging power supply subsystem is made up of autotransformer, rectification circuit, IRF460 switching tube, kickback transformer.The storage magnetic energy of kickback transformer is converted into the electric energy of capacitor stores when switching tube breaks off.
(wavelength is greater than 870 nanometers by adjustment circuit (electric current and pulse width modulation), pulse diode drive circuit and pulse diode for pulse diode optical power conditioning subsystem; Less than 1730 nanometers) form, be used to provide the laser of pulse duration, pulsed light adjustable power joint.
Capacitive energy storage device and photoconductive switch electric discharge device by the series of combination of switch and storage capacitor (S1, C1 ... S4, C4), high voltage silicon stack and core devices photoconductive switch form, and realizes energy storage and based on the discharge of photoconductive switch.
The output pulse can be fed into ultra-wideband antenna; Can be transported to the cell suspension or the tissue of tumour; Act on the spore suspension and the herbaceous plant suspension in agricultural field.
Interconnected relationship:
As shown in Figure 1, come the Transistor-Transistor Logic level control impuls diode optical power conditioning subsystem of automatic control light signal, produce the adjustable light pulse of luminous energy; The miniaturization high voltage charging power supply is given different capacitance energy storages through high voltage silicon stack; Luminous energy makes the abundant conducting of photoconductive switch with corresponding electric energy coupling, realizes the abundant discharge of capacitor.
In sum, owing to adopted technique scheme, the beneficial effect of the utility model is:
This invention has the following technique effect:
1, improves the life-span of photoconductive switch
The abundant conducting of photoconductive switch and the abundant discharge of capacitor have reduced the residue electric field after the photoconductive switch illumination; Can not cause the secondary conducting when photoconductive switch is unglazed owing to the negative differential effect of GaAs; Reduced the thermal breakdown probability of photoconductive switch, thereby the life-span of GaAs photoconductive switch has been brought up to millions of times from tens of times.
2, regulated the parameters in series of electric pulse
In order to obtain the optimal response of certain loads, need carry out the adjusting of relative broad range to the pulse duration of electric pulse.Electrical pulse amplitudes is at 5-10kV, and pulse duration is that hundreds of psecs (ps) were regulated in hundreds of nanoseconds (ns).Pulse frequency has single to output to tens of hertz of (Hz) adjustable outputs.
3, reduced the volume of laser aid widely
The pulsed laser diode system has replaced bulky YAG laser, has reduced the volume of electric pulse generator, is convenient to carrying of electric pulse generator, has also reduced the support price in its cost and the operation widely.
4, the load of the multiple class of excitation
The controllability on a large scale of electronic pulse width is for the application of this pulse generator in the agricultural field lays a solid foundation.Plant cell and spore cell and mammalian cell differ greatly, and can use the less pulse deburring of pulse duration to swash the growth of crops and edible fungi; The pulse long with pulse duration, that electric field amplitude is big promotes the death (apoptosis and necrosis) of animal tumor cell.
Description of drawings
Fig. 1 is the utility model technical scheme sketch map.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, come the Transistor-Transistor Logic level control impuls diode optical power conditioning subsystem of automatic control light signal, produce the adjustable light pulse of luminous energy; The miniaturization high voltage charging power supply is given different capacitance energy storages through high voltage silicon stack; Luminous energy makes the abundant conducting of photoconductive switch with corresponding electric energy coupling, realizes the abundant discharge of capacitor.
Whole flow process:
The photoelectricity delayer sends the two-way triggering signal, and one the tunnel is called charging signals, and another road TTL signal is called the control light signal.Charging signals is provided with suitable delay with the control light signal, and the pressure-resistant time that makes photoconductive switch be under the dark resistance state is very short, reaches several microseconds, avoids thermal effect to cause the thermal breakdown of photoconductive switch.Charging signals is given the charging of miniaturization high voltage charging power supply, and then lets the different electric energy of storage capacitor (C1, C2, C3, C4) storage supply photoconductive switch to be discharged into load.Control light signal starting impulse led lighting circuit, through the electric current and the pulsewidth of adjustment drive circuit, thus the light energy output of change pulse diode.Photoconductive switch receives the effect of different laser powers; The electric energy that is stored in the storage capacitor corresponding with laser power is discharged to load; Form the adjustable high-voltage nanosecond pulse of pulse duration, offer various loads (spore suspension in military ultra-wideband antenna, medical tumour cell and tissue and agricultural field and herbaceous plant suspension).High pressure nanosecond, the voltage amplitude of electric pulse generator can also regulate to improve the photoconductive switch life-span to greatest extent through the input voltage of regulating primary source.The repetition rate of pulse is by the control of photoelectricity delayer, and the temperature of control tumour cell raises, and Treatment Effects in the electric pulse of research cell is impelled the apoptosis of tumour cell and promoted plant cell and archesporial growth effects.
Because the pulsed laser diode system replaced the YAG laser system, whole laser system volume is little, but the luminous energy flexible, thus reduced volume, weight and the cost of whole electric pulse generator.Keep the pulsewidth of pulsed laser diode drive circuit constant, change the drive current of adjustment circuit, thereby change the power of pulse diode; The drive current of holding circuit is constant, thus the size of adjustment pulsewidth adjustment light energy output.
Because the luminous energy of laser part and the energy storage of capacitor cooperate, the electric field of GaAs photoconductive switch after discharge prolonged the photoconductive switch life-span less than 3.4kV/cm (being lower than the negative differential threshold field of GaAs), improved the utilance of photoconductive switch.
Because the changeability and the diversity of load; Determined amplitude, pulse duration and the repetition rate of output high pressure nanosecond electric pulse should have controllability; This high pressure nanosecond, electric pulse generator realized the adjustable target of parameter on a large scale, thereby can be with the impulse action of demands of different in different loads.With the military ultra-wideband antenna of ultra wide band electric pulse signal feed-in, can form aerial array, improve the axial Energy density of aerial array, make the impulse radar transmitter, cooperate the reflected signal device of accepting, catch Air Stealth Flying Object Using.Can act on tumour cell or tissue by the electric pulse that highfield, pulse duration is long, promote their apoptosis, reduce the side effect of oncotherapy.With the electric pulse effect plant cell and the spore cell of weak electric field, short pulse width, stimulate their growth, improve the output of crops and edible mushroom.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (5)
1. based on the adjustable high pressure of the parameter nanosecond electric pulse generator of photoconductive switch; It is characterized in that this high pressure nanosecond electric pulse generator comprises photoelectricity delayer subsystem, pulse diode optical power conditioning subsystem, high voltage charging power supply subsystem, capacitance energy storage subsystem and photoconductive switch discharge subsystem and load applications subsystem, the laser pulse diode in the wherein said pulse diode optical power conditioning subsystem is connected with core devices photoconductive switch in the said capacitance energy storage subsystem.
2. the adjustable high pressure of the parameter nanosecond electric pulse generator based on photoconductive switch according to claim 1; It is characterized in that said photoelectricity delayer subsystem by repetition rate control button, 555 timers, time-delay regulate button, amplification circuit of electrical signal is formed, being used to be respectively the miniaturization high voltage charging power supply provides the charging signals of time-delay and triggering signal is provided for the pulsed illumination diode drive circuit.
3. the adjustable high pressure of the parameter nanosecond electric pulse generator based on photoconductive switch according to claim 1 is characterized in that said high voltage charging power supply subsystem is made up of autotransformer, rectification circuit, IRF460 switching tube, kickback transformer; Wherein said kickback transformer is used for it is stored magnetic energy is converted into capacitor stores when switching tube breaks off electric energy.
4. the adjustable high pressure of the parameter nanosecond electric pulse generator based on photoconductive switch according to claim 1; It is characterized in that said pulse diode optical power conditioning subsystem is made up of adjustment circuit, pulse diode drive circuit and aforementioned laser pulse diode, be used to the laser that provides pulse duration, pulsed light adjustable power to save.
5. the adjustable high pressure of the parameter nanosecond electric pulse generator based on photoconductive switch according to claim 1; It is characterized in that said capacitance energy storage subsystem comprises capacitive energy storage device and photoconductive switch electric discharge device; Said capacitive energy storage device and photoconductive switch electric discharge device are made up of series of combination, high voltage silicon stack and the core devices photoconductive switch of switch and storage capacitor, are used to realize energy storage and based on the discharge of photoconductive switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202139542U CN202127386U (en) | 2011-06-23 | 2011-06-23 | High-voltage parameter-adjustable nanosecond electric pulse generator based on photoconductive switch |
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| CN2011202139542U CN202127386U (en) | 2011-06-23 | 2011-06-23 | High-voltage parameter-adjustable nanosecond electric pulse generator based on photoconductive switch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624278A (en) * | 2012-04-21 | 2012-08-01 | 吉林大学 | Pulse driving power supply of high-power semiconductor laser |
| CN104639109A (en) * | 2015-02-12 | 2015-05-20 | 上海凌世电子有限公司 | Spike pulse generator |
| CN114601551A (en) * | 2022-03-18 | 2022-06-10 | 天津市鹰泰利安康医疗科技有限责任公司 | High-frequency irreversible electroporation treatment system |
-
2011
- 2011-06-23 CN CN2011202139542U patent/CN202127386U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624278A (en) * | 2012-04-21 | 2012-08-01 | 吉林大学 | Pulse driving power supply of high-power semiconductor laser |
| CN102624278B (en) * | 2012-04-21 | 2013-12-25 | 吉林大学 | Pulse driving power supply of high-power semiconductor laser |
| CN104639109A (en) * | 2015-02-12 | 2015-05-20 | 上海凌世电子有限公司 | Spike pulse generator |
| CN104639109B (en) * | 2015-02-12 | 2017-03-01 | 上海凌世电子有限公司 | Spike generator |
| CN114601551A (en) * | 2022-03-18 | 2022-06-10 | 天津市鹰泰利安康医疗科技有限责任公司 | High-frequency irreversible electroporation treatment system |
| CN114601551B (en) * | 2022-03-18 | 2022-11-18 | 天津市鹰泰利安康医疗科技有限责任公司 | High-frequency irreversible electroporation treatment system |
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Granted publication date: 20120125 |
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