CN203777504U - Double-pulse magnetic sensitive effect increasing instrument - Google Patents
Double-pulse magnetic sensitive effect increasing instrument Download PDFInfo
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- CN203777504U CN203777504U CN201420125233.XU CN201420125233U CN203777504U CN 203777504 U CN203777504 U CN 203777504U CN 201420125233 U CN201420125233 U CN 201420125233U CN 203777504 U CN203777504 U CN 203777504U
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Abstract
The utility model discloses a double-pulse magnetic sensitive effect increasing instrument, which comprises a magnetic head and a control circuit, wherein the magnetic head uses a magnetic material as the magnetic core and uses an exciting coil to generate a high-intensity magnetic field, and the control circuit controls pulse current of a coil arranged in the magnetic head and achieves purposes of controlling the intensity of the magnetic field and the pulsed magnetic field frequency through controlling the size, the direction and the change frequency of the pulse current. The technical scheme of the utility model is that a problem of residual magnetism is solved by using positive and negative double pulse, the variable quantity of the magnetic flux is increased greatly, and the change rate of the magnetic field is ensured to be continuously adjustable. Meanwhile, selection for a one-way pulsed magnetic field can also be reserved, thereby being conducive to flexible selection according to requirements.
Description
Technical field
This utility model belongs to Medical electromagnetic enhanced sensitivity technology, more particularly, is specifically related to a kind of new dipulse magnetic field generator, to utilize pulsed magnetic field to strengthen the effect of tumor radiotherapy and chemotherapy.
Background technology
Tumor is the common and multiple disease of harm humans health, and wherein malignant tumor that is cancer are one of serious diseases of current harm humans health.At present, Radiotherapy chemotherapy is still one of Main Means of oncotherapy.But owing to lacking selectivity and specific aim, when chemicotherapy, ray, chemotherapeutic are not only killed cancerous cell, kill too the normal cell of human body, and the toxicity of chemicotherapy has seriously limited the performance of its therapeutical effect, patients ' life quality is obviously declined, many patients thereby abandon Radiotherapy chemotherapy.In fact, many tumour patients are not to die from tumor itself, but die from the complication that chemicotherapy causes.For the toxicity problem of chemicotherapy, the theory of chemicotherapy efficacy enhancing and toxicity reducing is considered to improve in a short time an effective way of tumor cure rate, require chemicotherapy synergisting method to there is safe, nontoxic, mitigation symptoms and do not affect the feature of original therapeutic scheme, utilizing magnetic field non-thermal biological effect (being the biological effect of magnetic field that frequency is lower) to strengthen therapeutic effect and just meeting this feature.There is many-sided research magnetic field non-thermal biological effect to tumor and treatment of cancer effect, pointed out that magnetic field has selective killing or growth inhibited effect to cancerous cell.Change because the effect of specific magnetic fields causes in cell charged particle or gene, effect and the transmission between molecule and electronics in cell is interfered, even destroyed, thus affect the growth and breeding of cancerous cell, make its poor growth or stagnation.The non-thermal biological effect in magnetic field has nonlinear feature, has significantly " frequency window effect " and " power window effect ", and magnetic field has selective killing or growth inhibited effect to cancerous cell.There is " threshold " value, " frequency or modulation window " and " intensity window " in low frequency magnetic field non-thermal biological effect.
At present domestic also useful low frequency or D.C. magnetic field carry out enhancement effect research, but that effect can not show a candle to pulsed magnetic field is good.About the sensitization of pulsed magnetic field, research is pointed out, the Synergistic Mechanisms of pulsed magnetic field is to be greater than Normocellular characteristic according to cancer cell membrane negative charge density, utilize pulsed magnetic field action in cancerous cell, the transition of electromagnetic radiation magnetic flux in cell, make the micro-electric current compared with normal cell in cancerous cell produce larger variation, especially to Ca
++, K
+the impact of ion channel is larger, and then change its biological characteristics, reaches physics effect of enhanced sensitivity.In addition, pulsed magnetic field is to G
0phase tumor cell has induction of differentiation, is therefore preventing can bringing into play larger effect aspect tumor recurrence, transfer.Also have research to point out, pulsed magnetic field energy inducing apoptosis of tumour cell, enhancing tumor cell are to the effect such as Concurrent Chemoradiotherapy Sensitivity and reverse multiple drug resistance of tumor.
Conventional pulse magnetosensitive increasing instrument device is generally Setting of Single-Pulse Magnetic Field and unidirectional pulse sequence (continuous impulse) magnetic field at present, and the magnetic field intensity that the former produces is excessive, and the latter adopts unidirectional current, intensity decreases.The coil that produces magnetic field can be air core coil, and without remanent magnetism problem, magnetic induction is less; Also can utilize magnetic material (as silicon steel, ferrite etc.) to strengthen magnetic field, but have remanent magnetism problem.
Utility model content
Technical purpose of the present utility model is to overcome the deficiencies in the prior art, based on magnetic field parameter requirement, provides new magnetic field generator that is magnetosensitive increasing instrument.The technical solution of the utility model utilizes positive and negative dipulse to solve remanent magnetism problem, greatly strengthens the variable quantity of magnetic flux, and ensures the adjustable continuously of rate of change of magnetic.Meanwhile, also can retain the selection in unidirectional pulse magnetic field, in order to selecting flexibly as required.
Technical purpose of the present utility model is achieved by following technical proposals:
Dipulse magnetosensitive increasing instrument, comprises magnetic head and control circuit, wherein:
Magnetic head utilizes magnetic material as magnetic core, produces compared with high-intensity magnetic field; Control circuit control is arranged on the pulse current of the coil in magnetic head, reaches the intensity of controlling magnetic field and the object of pulsed magnetic field frequency by size, direction and the change frequency of control impuls electric current.
Described magnetic head is made up of magnetizing coil and magnetic core, described magnetic core presents C shape magnetic material, by the first vertical part, the second vertical part, the 3rd vertical part, the first horizontal part and the second horizontal part composition, the two ends of the first horizontal part arrange respectively the first vertical part and the 3rd vertical part, the two ends of the second horizontal part arrange respectively the second vertical part and the 3rd vertical part, the two ends of the 3rd vertical part arrange respectively the first horizontal part and the second horizontal part, between the first vertical part and the second vertical part, form the opening of C shape, to ensure that the magnetic line of force is evenly distributed in the C shape magnetic core being made up of magnetic material, described magnetizing coil is wrapped on magnetic core, and uniform winding is on the first vertical part, the second vertical part, the 3rd vertical part, the first horizontal part and the second horizontal part, and its quantity is 2-8 groups, and every group of coil selected 10～200 circles, in the time winding the line, the coiling of composition coil adopts diameter of section between 0.8～2mm, and for example enamel-covered wire, according to possible size of current sub-thread coiling or multiply and be coiled into coil, in said head structure, between each magnetizing coil, can select the mode of series, parallel or connection in series-parallel combination to connect, then by the exciting bulk coil Access Control circuit after connecting.
In said head structure, magnetizing coil is preferably arranged near on first vertical part and the second vertical part of C shape opening part.
In said head structure, described magnetic core adopts soft magnetic materials, and the material of selecting is as stalloy, ferrite, amorphous magnetic material etc.; The formation of magnetic core can be made according to selected magnetic material feature, as selects stalloy, can adopt the mode of laminate patch plug-in mounting to make, specifically:
The length (b) of the first vertical part is 100-400mm;
The length (a) of the second vertical part is 100-400mm;
The length (e) of the 3rd vertical part is 600-1200mm;
The length (c) of the first horizontal part is 200-600mm;
The length (c) of the second horizontal part is 200-600mm;
The spacing (d) of the first horizontal part and the second horizontal part is 500-1000mm;
The length (f) of the C shape opening forming between the first vertical part and the second vertical part is 400-600mm;
The sectional area (A) of the C shape opening forming between the first vertical part and the second vertical part is 50～1600cm
2;
All the other locational cross-sectional areas are 1-0.3 times of sectional area of C shape opening.
In said head structure, select sub-thread coiling or multiply and around principle be that while being operated in maximum rated current, caloric value is very little, the temperature of work long hours under Indoor Natural environment (more than 4 hours) raises and is no more than 30 DEG C.
Described control circuit, comprises pulse generator, the first drive circuit, the second drive circuit, the 3rd drive circuit, the 4th drive circuit, the first electronic power switch, the second electronic power switch, the 3rd electronic power switch, quadrielectron power switch, resistance:
Described the first drive circuit, the second drive circuit, the 3rd drive circuit, the 4th drive circuit, the first electronic power switch, the second electronic power switch, the 3rd electronic power switch and quadrielectron power switch composition full bridge inverter; Described the first drive circuit, the first electronic power switch, the 4th drive circuit and quadrielectron power switch form one group, and described the first drive circuit is connected with the first electronic power switch, and described the 4th drive circuit is connected with quadrielectron power switch; Described the second drive circuit, the second electronic power switch, the 3rd drive circuit and the 3rd electronic power switch form another group, and described the second drive circuit is connected with the second electronic power switch, and described the 3rd drive circuit is connected with the 3rd electronic power switch; The first-phase pulse of described pulse generator is connected with the second drive circuit, the 3rd drive circuit, and the second-phase pulse of pulse generator is connected with the first drive circuit, the 4th drive circuit; The first-phase pulse of described pulse generator and the impulse phase of second-phase pulse differ 180 °; One end of magnetizing coil (being all magnetizing coil in the magnetic head structure exciting bulk coil after series connection or parallel connection) is connected with the first electronic power switch, the second electronic power switch, after the other end is in series with a resistor, be connected with the 3rd electronic power switch, quadrielectron power switch.
The external power supply adopting selects 220 volts of line voltages to obtain (i.e. shunt capacitance C on whole circuit through rectifying and wave-filtering, to realize filter action), also can directly adopt rearrangeable switch Power supply (can be multiple low-tension supplies series connection meet the requirements of external power supply).
First, second phase pulse is produced and is controlled by pulse-generator circuit, and is determined the size of pulse frequency by pulse generator, and controls both; The size of pulse current is determined by external power supply and resistance, thus the intensity of definite pulsed magnetic field.
Described the first electronic power switch, the second electronic power switch, the 3rd electronic power switch and quadrielectron power switch are respectively IGBT, also can be replaced by suitable field effect transistor; No matter which kind of, require its inside to comprise the body diode with clamping action.
Described the first drive circuit, the second drive circuit, the 3rd drive circuit and the 4th drive circuit adopt photoelectric coupling drive circuit, as EXB841.
Described pulse generator can adopt PWM(pulse width modulation) control chip, fix its output pulse width, produce desired pulse.
The periodic magnetic flux transition of pulsed magnetic field is the key factor that affects tumor cell, like this magnetic field parameter that produces the equipment of pulsed magnetic field or be called magnetosensitive increasing instrument is required at least should comprise two aspects: the one, the change frequency of magnetic flux, the one, the variable quantity of magnetic flux.Available technology adopting Setting of Single-Pulse Magnetic Field and unidirectional pulse sequence (continuous impulse) magnetic field.
General magnetic material all can have remanent magnetism unidirectional after excitatory, can eliminate remanent magnetism by inverse-exciting, and magnetic field magnetic variations of flux amount is increased.The principle schematic of technical solutions of the utility model as shown in Figure 1, after a direction pulse current stops, due to magnetic material left magnetic effect, still has certain magnetic field to exist; In the time that reverse current passes through, remanence disappearance produces opposing magnetic field.The size of electric current determines the intensity in the magnetic field that produces, pulse, and power frequency determines the frequency of pulsed magnetic field, selected magnetic material determines the size of remanent magnetism, the interval t between reversal pulse
cbe the lasting time of each remanent magnetism; By selecting high performance current transformation device, as field effect transistor, IGBT etc., can be by t
cforeshorten to Microsecond grade, thereby obtain the dipulse current waveform that frequency is the approximate square wave of 0～1000Hz.The magnetic induction absolute value in magnetic field should be in 0～0.1T(tesla) scope in, such dipulse rate of change of magnetic improves at least 1 times than the unidirectional pulse magnetic field under equal conditions.
The utility model proposes a kind of apparatus and method of new dipulse magnetosensitive potentiation, can obtain frequency is the dipulse field waveform of 0～1000Hz, the magnetic induction absolute value in magnetic field should reach 0.1T(tesla), its variable quantity can reach 0.2T(tesla); Large 1 times of the variable quantity of the intensity in comparable unidirectional pulse magnetic field under similarity condition; Meanwhile, if only allow unidirectional pulse electric current by and select the magnetic material that remanent magnetism is less, can obtain unidirectional pulse magnetic field.This device both can obtain positive and negative bidirectional pulse magnetic field like this, also can obtain unidirectional pulse magnetic field, can select flexibly as required, for the magnetic field enhanced sensitivity research of oncotherapy provides new measure, widen the scope of the action of a magnetic field, for further studying and lay a good foundation.
Brief description of the drawings
Fig. 1 is the principle schematic of technical solutions of the utility model.
Fig. 2 is magnetic head structure schematic diagram in technical solutions of the utility model, wherein 1 is the first vertical part, 2 is the second vertical part, 3 is the 3rd vertical part, 4 is the first horizontal part, 5 is the second horizontal part, 6 is magnetizing coil, a is the length of the second vertical part, b is the length of the first vertical part, c is the length of the first horizontal part, c is the length of the second horizontal part, d is the spacing of the first horizontal part and the second horizontal part, e is the length of the 3rd vertical part, f is the length of the C shape opening that forms between the first vertical part and the second vertical part, A is the sectional area of the C shape opening that forms between the first vertical part and the second vertical part.
Fig. 3 is control circuit structural representation in technical solutions of the utility model, and wherein drive circuit 1-4, pulse generator (pulse of A phase, the pulse of B phase), electronic power switch VT1～VT4, C are that electric capacity, R are resistance, U
dfor power supply, N
1for being arranged on the coil on magnetic head.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with specific embodiment.
Magnetic head structure schematic diagram (schematic cross-section) in technical solutions of the utility model as shown in Figure 2, wherein 1 is the first vertical part, 2 is the second vertical part, 3 is the 3rd vertical part, 4 is the first horizontal part, 5 is the second horizontal part, 6 is magnetizing coil, a is the length of the second vertical part, b is the length of the first vertical part, c is the length of the first horizontal part, c is the length of the second horizontal part, d is the spacing of the first horizontal part and the second horizontal part, e is the length of the 3rd vertical part, f is the length of the C shape opening that forms between the first vertical part and the second vertical part, A is the sectional area of the C shape opening that forms between the first vertical part and the second vertical part.
Magnetic head is made up of magnetizing coil and magnetic core, described magnetic core presents C shape magnetic material, by the first vertical part, the second vertical part, the 3rd vertical part, the first horizontal part and the second horizontal part composition, the two ends of the first horizontal part arrange respectively the first vertical part and the 3rd vertical part, the two ends of the second horizontal part arrange respectively the second vertical part and the 3rd vertical part, the two ends of the 3rd vertical part arrange respectively the first horizontal part and the second horizontal part, between the first vertical part and the second vertical part, form the opening of C shape, to ensure that the magnetic line of force is evenly distributed in the C shape magnetic core being made up of magnetic material.Described magnetic core adopts soft magnetic materials, and the material of selecting is as stalloy, ferrite, amorphous magnetic material etc.; The formation of magnetic core can be made according to selected magnetic material feature, as selects stalloy, can adopt the mode of laminate patch plug-in mounting to make, specifically:
The length (b) of the first vertical part is 100-400mm;
The length (a) of the second vertical part is 100-400mm;
The length (e) of the 3rd vertical part is 600-1200mm;
The length (c) of the first horizontal part is 200-600mm;
The length (c) of the second horizontal part is 200-600mm;
The spacing (d) of the first horizontal part and the second horizontal part is 500-1000mm;
The length (f) of the C shape opening forming between the first vertical part and the second vertical part is 400-600mm;
The sectional area (A) of the C shape opening forming between the first vertical part and the second vertical part is 50～1600cm
2;
All the other locational cross-sectional areas are 1-0.3 times of sectional area of C shape opening.
Magnetizing coil is wrapped on magnetic core, and uniform winding is on the first vertical part, the second vertical part, the 3rd vertical part, the first horizontal part and the second horizontal part, and its quantity is 2-8 groups (being illustrated as 6 groups), and every group of coil selected 10～200 circles; In the time winding the line, the coiling of composition coil adopts diameter of section between 0.8～2mm, for example enamel-covered wire, according to possible size of current sub-thread coiling or multiply and be coiled into coil, select sub-thread coiling or multiply and around principle be that while being operated in maximum rated current, caloric value is very little, the temperature of work long hours under Indoor Natural environment (more than 4 hours) raises and is no more than 30 DEG C.
Magnetizing coil is preferably arranged near on first vertical part and the second vertical part of C shape opening part.Between above-mentioned each magnetizing coil, can select the mode of series, parallel or connection in series-parallel combination.
Control circuit structural representation in technical solutions of the utility model as shown in Figure 3, wherein drive circuit 1-4, pulse generator (pulse of A phase, the pulse of B phase), electronic power switch VT1～VT4, C are that electric capacity, R are resistance, U
dfor power supply, N
1for being arranged on the coil on magnetic head.
Described N
1for the magnetizing coil on aforementioned magnetic head, coil can be series, parallel or the connection in series-parallel combination of coil on aforementioned magnetic head; Control circuit is mainly by 4 electronic power switch VT
1～VT
4the full bridge inverter composition of composition, VT1, VT4 are one group, and VT2, VT3 are another group, and electronic power switch VT1～VT4 is connected with drive circuit 1-4 respectively.The A phase pulse of described pulse generator is connected with drive circuit 2, drive circuit 3; The B phase pulse of pulse generator is connected with drive circuit 1, drive circuit 4; Magnetizing coil N
1one end be connected with VT1, VT2, after the other end is connected with resistance R, be connected with VT4, VT3; A, the pulse of B phase are produced and are controlled by pulse-generator circuit, and determine the size of pulse frequency by pulse generator, and control both impulse phases and differ 180 °; The size of pulse current is passed through U
ddetermine with R, thus the intensity of definite pulsed magnetic field.
A that phase phase difference is 180 °, B two-phase pulse drives and alternate conduction produces forward and reverse function of current in N1, and size of current depends on resistance R and DC voltage U
d.In the time of VT1, VT4 conducting simultaneously, electric current is through VT1, N1, R, VT4 closure, DC voltage U
dbe added in N1 upper, the voltage on N1 is left positive right negative, not conducting of VT2, VT3; Subsequently, VT1, VT4 turn-off, VT2, VT3 conducting simultaneously, and electric current is through VT3, R, N1, VT2 closure, and the voltage on N1 is right positive left negative, and the upper voltage polarity inversion of N1 is come.So just on coil, produce positive and negative dipulse electric current, thereby produced dipulse magnetic field.
That in figure, VT1～VT4 selects is IGBT, also can be replaced by suitable field effect transistor; No matter which kind of, require its inside to comprise the body diode with clamping action.4 drive circuits adopt photoelectric coupling drive circuit, as EXB841; U
dcan be that 220 volts of line voltages obtain (being capacitor C filter action) through rectifying and wave-filtering, also can directly adopt rearrangeable switch Power supply (can multiple low-tension supply series connection meet the requirements of U
d).Pulse generator can adopt PWM(pulse width modulation) control chip, as SG3525, also can adopt numeral to be combined and to combine with analog circuit, fix its output pulse width, produce desired pulse.Pwm chip output pulse can be two-phase pulse (A, B is biphase), and 180 ° of phase contrasts are controlled the output of bidirectional pulse magnetic field; Also can an output single-phase pulse (A or B phase) export, control the output of unidirectional pulse magnetic field.
Leukemia HL-60 cell is tested, and the apoptosis rate that adopts independent gamma-rays effect is 18.6%; Under similarity condition, unidirectional pulse magnetic field (10mT, 250Hz) is 33.4% with the symphyogenetic apoptosis rate of gamma-rays, and bidirectional pulse magnetic field (5mT, 250Hz) is 34.1% with the symphyogenetic apoptosis rate of gamma-rays.Can find out, pulsed magnetic field is to the obvious effect of enhanced sensitivity of gamma-rays effect and dipulse magnetic field same effect of enhanced sensitivity under the condition that weakens magnetic field intensity.
Above this utility model is done to exemplary description; should be noted that; in the situation that not departing from core of the present utility model, the replacement that is equal to that any simple distortion, amendment or other those skilled in the art can not spend creative work all falls into protection domain of the present utility model.
Claims (10)
1. dipulse magnetosensitive increasing instrument, is characterized in that, comprises magnetic head and control circuit, wherein:
Described magnetic head is made up of magnetizing coil and magnetic core, described magnetic core presents C shape magnetic material, formed by the first vertical part, the second vertical part, the 3rd vertical part, the first horizontal part and the second horizontal part, the two ends of the first horizontal part arrange respectively the first vertical part and the 3rd vertical part, the two ends of the second horizontal part arrange respectively the second vertical part and the 3rd vertical part, the two ends of the 3rd vertical part arrange respectively the first horizontal part and the second horizontal part, form the opening of C shape between the first vertical part and the second vertical part; Described magnetizing coil is wrapped on magnetic core, and uniform winding is on the first vertical part, the second vertical part, the 3rd vertical part, the first horizontal part and the second horizontal part;
Described control circuit, comprises pulse generator, the first drive circuit, the second drive circuit, the 3rd drive circuit, the 4th drive circuit, the first electronic power switch, the second electronic power switch, the 3rd electronic power switch, quadrielectron power switch, resistance:
Described the first drive circuit, the second drive circuit, the 3rd drive circuit, the 4th drive circuit, the first electronic power switch, the second electronic power switch, the 3rd electronic power switch and quadrielectron power switch composition full bridge inverter; Described the first drive circuit, the first electronic power switch, the 4th drive circuit and quadrielectron power switch form one group, and described the first drive circuit is connected with the first electronic power switch, and described the 4th drive circuit is connected with quadrielectron power switch; Described the second drive circuit, the second electronic power switch, the 3rd drive circuit and the 3rd electronic power switch form another group, and described the second drive circuit is connected with the second electronic power switch, and described the 3rd drive circuit is connected with the 3rd electronic power switch; The first-phase pulse of described pulse generator is connected with the second drive circuit, the 3rd drive circuit, and the second-phase pulse of pulse generator is connected with the first drive circuit, the 4th drive circuit; The first-phase pulse of described pulse generator and the impulse phase of second-phase pulse differ 180 °; One end of magnetizing coil is connected with the first electronic power switch, the second electronic power switch, after the other end is in series with a resistor, is connected with the 3rd electronic power switch, quadrielectron power switch.
2. dipulse magnetosensitive increasing instrument according to claim 1, is characterized in that, described magnetizing coil is preferably arranged near on first vertical part and the second vertical part of C shape opening part.
3. according to the dipulse magnetosensitive increasing instrument described in claim 1 or 2, it is characterized in that, described magnetizing coil quantity is 2-8 groups, and every group of coil selected 10～200 circles; In the time winding the line, the coiling of composition coil adopts the enamel-covered wire of diameter of section between 0.8～2mm.
4. according to the dipulse magnetosensitive increasing instrument described in claim 1 or 2, it is characterized in that, in described magnetic head structure, between each magnetizing coil, select the mode of series, parallel or connection in series-parallel combination to connect; In control circuit, by the exciting bulk coil Access Control circuit after connecting in magnetic head structure.
5. dipulse magnetosensitive increasing instrument according to claim 1, is characterized in that, described magnetic core adopts soft magnetic materials, and the length of the first vertical part is 100-400mm; The length of the second vertical part is 100-400mm; The length of the 3rd vertical part is 600-1200mm; The length of the first horizontal part is 200-600mm; The length of the second horizontal part is 200-600mm; The spacing of the first horizontal part and the second horizontal part is 500-1000mm; The length of the C shape opening forming between the first vertical part and the second vertical part is 400-600mm; The sectional area of the C shape opening forming between the first vertical part and the second vertical part is 50～1600cm
2; All the other locational cross-sectional areas are 1-0.3 times of sectional area of C shape opening.
6. dipulse magnetosensitive increasing instrument according to claim 1, is characterized in that, described the first electronic power switch, the second electronic power switch, the 3rd electronic power switch and quadrielectron power switch are field effect transistor.
7. dipulse magnetosensitive increasing instrument according to claim 6, is characterized in that, described the first electronic power switch, the second electronic power switch, the 3rd electronic power switch and quadrielectron power switch are IGBT.
8. dipulse magnetosensitive increasing instrument according to claim 1, is characterized in that, described the first drive circuit, the second drive circuit, the 3rd drive circuit and the 4th drive circuit adopt photoelectric coupling drive circuit.
9. dipulse magnetosensitive increasing instrument according to claim 1, is characterized in that, described the first drive circuit, the second drive circuit, the 3rd drive circuit and the 4th drive circuit adopt photoelectric coupling drive circuit EXB841.
10. dipulse magnetosensitive increasing instrument according to claim 1, is characterized in that, described pulse generator adopts pwm chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125233.XU CN203777504U (en) | 2014-03-19 | 2014-03-19 | Double-pulse magnetic sensitive effect increasing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420125233.XU CN203777504U (en) | 2014-03-19 | 2014-03-19 | Double-pulse magnetic sensitive effect increasing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203777504U true CN203777504U (en) | 2014-08-20 |
Family
ID=51313739
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|---|---|---|---|
| CN201420125233.XU Expired - Fee Related CN203777504U (en) | 2014-03-19 | 2014-03-19 | Double-pulse magnetic sensitive effect increasing instrument |
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| Country | Link |
|---|---|
| CN (1) | CN203777504U (en) |
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2014
- 2014-03-19 CN CN201420125233.XU patent/CN203777504U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20180319 |