CN200989937Y - Magnetic field detector - Google Patents
Magnetic field detector Download PDFInfo
- Publication number
- CN200989937Y CN200989937Y CN 200620017145 CN200620017145U CN200989937Y CN 200989937 Y CN200989937 Y CN 200989937Y CN 200620017145 CN200620017145 CN 200620017145 CN 200620017145 U CN200620017145 U CN 200620017145U CN 200989937 Y CN200989937 Y CN 200989937Y
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- voltage changer
- detector
- utility
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
The utility model relates to a magnetic field detection device comprising an impulsator, a voltage converter and an output rectifying and filtering unit; wherein, the voltage coverter has a primary winding connected with the impulsator and a secondary winding connected with the output rectifying and the filtering unit. The utility model makes a judgment that whether or not an additional magnetic field exits by detecting the value of the output signal generated by the voltage coverter. Thanks to the adoption of a voltage converter as a magnetic field detecting component, the utility model has the advantages of simple circuit, lower cost, free detecting dead angle in detection, flexible setting of input driving signal and controllable flexibility according to demands.
Description
Technical field
The utility model relates to detection technique, more particularly, relates to a kind of detector for magnetic field.
Background technology
Add high-intensity magnetic field and may influence the operate as normal of product; for example; metering outfit such as ammeter, gas meter placed around magnetic devices (as electromagnet) or add the high-intensity magnetic field that adds that heavy current produces to coil can make the metering outfit operation irregularity or quits work, and causes damage to relevant unit.Therefore, on many products, all need to be equipped with detector for magnetic field.
Current magnetic field detection adopts tongue tube usually, the ear sensing element waits and realizes suddenly, but it is all undesirable to detect effect.Wherein, tongue tube is very responsive to the directivity in magnetic field, and because tongue tube is switching value output, sensitivity is wayward.And equally also there is too sensitive issue of directivity in the ear sensing element suddenly, can not detect field strength values accurately in some direction and angle, and so pick-up unit also just can not accurately detect to exist and add high-intensity magnetic field.If use a plurality of Hall devices to detect the field strength values of different directions respectively, then treatment circuit can be very complicated, and the cost of circuit also increases with regard to corresponding.
The utility model content
The technical problems to be solved in the utility model is, at the deficiencies in the prior art, provides a kind of can accurately detecting to add the detector for magnetic field that high-intensity magnetic field exists.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of detector for magnetic field, comprise pulse producer, voltage changer and output rectification and filter unit, the elementary winding of described voltage changer is connected on the described pulse producer, and the secondary winding of described voltage changer is connected on described output rectification and the filter unit.
In detector for magnetic field described in the utility model, between the elementary winding of described pulse producer and described voltage changer, be connected with pulse driver.
In detector for magnetic field described in the utility model, described pulse driver comprises first triode, second triode and biasing resistor, the base stage of described first triode, collector and emitter connects described pulse producer respectively, the end of the same name of the elementary winding of direct supply and described voltage changer, the base stage of described second triode and emitter are connected the end of the same name of the elementary winding of described pulse producer and described voltage changer respectively, the collector of described second triode is connected to the different name end of the elementary winding of described voltage changer, ground connection simultaneously, described biasing resistor are connected between the end of the same name of elementary winding of described pulse producer and described voltage changer.
In detector for magnetic field described in the utility model, described output rectification and filter unit comprise electric capacity and diode, the input end of described diode and output terminal are connected respectively on the secondary winding of described voltage changer, described electric capacity is connected between the secondary winding of the output terminal of described diode and described voltage changer, and described second resistance is connected in described electric capacity two ends in parallel.
In detector for magnetic field described in the utility model, iron core is shaped as annular, the degree of lip-rounding, E-E shape, E-I shape, jar shape or clavate in the described voltage changer.
Implement detector for magnetic field of the present utility model, has following beneficial effect: judge whether to exist externally-applied magnetic field by the size that detects the output signal that voltage changer generates, owing to adopt voltage changer as magnetic devices, circuit is simple, cost is lower, do not detect the dead angle in testing process, input drive signal also can be provided with flexibly, and sensitivity can be controlled as required.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram of the testing circuit of the utility model detector for magnetic field;
Fig. 2 be in the utility model detector for magnetic field voltage changer adopt two-wire and around structural representation;
Fig. 3 is that voltage changer adopts the structural representation that separately twines in the utility model detector for magnetic field;
Fig. 4 is the structural representation that voltage changer adopts annular core in the utility model detector for magnetic field;
Fig. 5 is the structural representation that voltage changer adopts E-E shape iron core in the utility model detector for magnetic field;
Fig. 6 is the structural representation that voltage changer adopts the E-I iron core in the utility model detector for magnetic field;
Fig. 7 is the structural representation that voltage changer adopts pot core in the utility model detector for magnetic field;
Fig. 8 is the structural representation that voltage changer adopts degree of lip-rounding iron core in the utility model detector for magnetic field;
Fig. 9 is the structural representation that voltage changer adopts the clavate iron core in the utility model detector for magnetic field.
Figure 10 is the structural representation of the utility model detector for magnetic field.
Embodiment
Fig. 1 is the schematic diagram of the testing circuit of the utility model detector for magnetic field.As shown in Figure 1, the detector for magnetic field introduced of the utility model mainly comprises pulse producer 1, pulse driver 2, voltage changer T and output rectification and filter unit 3.Wherein, pulse producer 1 can be produced by oscillating circuit, pulse generation application-specific integrated circuit (integrated circuit) circuit or software; Pulse driver 2 comprises the first triode Q1, the second triode Q2, biasing resistor R2 and direct supply DC again, and as selection, pulse driver 2 also can comprise first resistance R 1 of metering function.The effect of pulse driver 2 is that the alternating current that paired pulses generator 1 generates amplifies, promptly when pulse producer 1 output high level, the first triode Q1 conducting, at its emitter output amplified current, when pulse producer 1 output low level, the second triode Q2 conducting is to the elementary winding discharge of voltage changer T; Output rectification and filter unit 3 comprise capacitor C, diode D, as selection, also can comprise load R3.The effect of output rectification and filter unit 3 is that the alternating current that the secondary winding to voltage changer T generates carries out filtering and rectification.
When not having externally-applied magnetic field, the alternating current that pulse producer 1 generates is after pulse driver 2 amplifies, driving voltage transducer T secondarily the level winding on the outputting standard alternating voltage, convert the standard DC voltage to after the diode D rectification of output rectification and filter unit 3, this standard dc voltage value can directly reflect the size of the magnetic field intensity that is generated by voltage changer T.Do not having under the situation of externally-applied magnetic field, when the alternating current of pulse producer 1 generation was relatively stable, this standard direct current output valve was approximately a fixed value.
When having externally-applied magnetic field, transformer flux changes, cause coil current to change, actual alternating current is exported in the acting in conjunction meeting of externally-applied magnetic field and pulse driver 2 on the secondary winding of voltage changer T, after the diode D rectification of output rectification and filter unit 3, convert actual DC voltage to, and then at the capacitor C two ends of output rectification and filter unit 3 formation virtual voltage, can obtain the actual DC output valve by the output terminal that detects described capacitor C two ends, this actual DC output valve is reflected then is size by voltage changer T and the common magnetic field intensity that generates of externally-applied magnetic field.Because the effect of externally-applied magnetic field, certainly exist difference between standard direct current output valve and the actual DC output valve, therefore, by the size of contrast standard direct current output valve and actual DC output valve, just can judge the size of externally-applied magnetic field on every side of detector for magnetic field.
Fig. 2 and Fig. 3 are respectively the structural representations of two kinds of coilings of voltage changer T in the utility model detector for magnetic field.As shown in the figure, in detector for magnetic field of the present utility model, the method for winding of voltage changer T can adopt two-wire and around (Fig. 2) or winding methods such as (Fig. 3) separately.For example, when using two-wire and winding method, primary and secondary wire spacing minimum can be reduced to minimum value with leakage inductance.
Fig. 4-Fig. 9 is respectively 7 kinds of structural representations that can be applicable to voltage changer T iron core in the utility model detector for magnetic field.As shown in the figure, in detector for magnetic field of the present utility model, voltage changer T can use difform iron core, as the degree of lip-rounding of the annular among Fig. 4, Fig. 8, the E-E shape of Fig. 5, the E-I shape of Fig. 6, the jar shape of Fig. 7 and the clavate of Fig. 9.For example, annular core shown in Figure 4 is most economical, compares with the iron core of other shapes, and the cost of detector for magnetic field is minimum.
Figure 10 is the structural representation of the utility model detector for magnetic field.As shown in the figure, the detector for magnetic field that the utility model is introduced is made up of shell 4, pcb board 5 (printed circuit board (PCB)) and drain pan 6, and wherein, the testing circuit among Fig. 1 is installed on the pcb board.
The detector for magnetic field that the utility model is introduced adopts voltage changer as magnetic devices, and circuit is simple, and cost is lower, does not detect the dead angle in testing process, and input drive signal also can be provided with flexibly, and sensitivity can be controlled as required.
Claims (5)
1, a kind of detector for magnetic field, it is characterized in that, comprise pulse producer, voltage changer and output rectification and filter unit, the elementary winding of described voltage changer is connected on the described pulse producer, and the secondary winding of described voltage changer is connected on described output rectification and the filter unit.
2, detector for magnetic field according to claim 1 is characterized in that, is connected with pulse driver between the elementary winding of described pulse producer and described voltage changer.
3, detector for magnetic field according to claim 2, it is characterized in that, described pulse driver comprises first triode, second triode and biasing resistor, the base stage of described first triode, collector and emitter connects described pulse producer respectively, the end of the same name of the elementary winding of direct supply and described voltage changer, the base stage of described second triode and emitter are connected the end of the same name of the elementary winding of described pulse producer and described voltage changer respectively, the collector of described second triode is connected to the different name end of the elementary winding of described voltage changer, ground connection simultaneously, described biasing resistor are connected between the end of the same name of elementary winding of described pulse producer and described voltage changer.
4, detector for magnetic field according to claim 1, it is characterized in that, described output rectification and filter unit comprise electric capacity and diode, the input end of described diode and output terminal are connected respectively on the secondary winding of described voltage changer, described electric capacity is connected between the secondary winding of the output terminal of described diode and described voltage changer, and described second resistance is connected in described electric capacity two ends in parallel.
5, detector for magnetic field according to claim 1 is characterized in that, iron core is shaped as annular, the degree of lip-rounding, E-E shape, E-I shape, jar shape or clavate in the described voltage changer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017145 CN200989937Y (en) | 2006-06-01 | 2006-06-01 | Magnetic field detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620017145 CN200989937Y (en) | 2006-06-01 | 2006-06-01 | Magnetic field detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200989937Y true CN200989937Y (en) | 2007-12-12 |
Family
ID=38940973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620017145 Expired - Fee Related CN200989937Y (en) | 2006-06-01 | 2006-06-01 | Magnetic field detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200989937Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082657B (en) * | 2006-06-01 | 2012-04-18 | 深圳长城开发科技股份有限公司 | Detector for magnetic field and method thereof |
-
2006
- 2006-06-01 CN CN 200620017145 patent/CN200989937Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082657B (en) * | 2006-06-01 | 2012-04-18 | 深圳长城开发科技股份有限公司 | Detector for magnetic field and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104934931A (en) | Residual current protection device | |
| CN102222984B (en) | On-line monitoring inductive electricity-taking device for intelligent switchgear | |
| CN101082657B (en) | Detector for magnetic field and method thereof | |
| CN112147401A (en) | Current detection circuit based on Hall current sensor | |
| CN107979066A (en) | Type B leakage circuit breakers and its detection method | |
| CN200989937Y (en) | Magnetic field detector | |
| CN207303993U (en) | Overcurrent-overvoltage protecting circuit, induction wireless power supply system and cooking apparatus | |
| CN101526561B (en) | High frequency single-polarity heavy current pulse detection circuit | |
| CN201697982U (en) | Multifunctional household appliance maintenance comprehensive testing instrument | |
| CN208125798U (en) | Open type leakage current sensor | |
| CN2662257Y (en) | A novel circuit current detecting device | |
| CN206118075U (en) | Electromagnetic heating arranges machine | |
| CN101162242A (en) | Method for testing direct current by quadrature transformer | |
| CN212060398U (en) | Non-invasive high-precision AC/DC universal current sensor | |
| CN102004231A (en) | DC and low frequency magnetic field signal detection device and detection method thereof | |
| CN110726956B (en) | Leakage detection circuit and device | |
| CN103439670A (en) | Alternating current power supply sensing device | |
| CN103619107A (en) | LED streetlamp control system and control method | |
| CN107787061A (en) | Electromagnetic heating cooking machine | |
| CN216595275U (en) | Hall current sensor and detection circuit special for automobile | |
| CN202443855U (en) | Comprehensive conditioning module for squirrel-cage hollow current transformer | |
| CN111211815A (en) | Antenna position detection device and detection method | |
| CN201340444Y (en) | Module for detecting residual voltage frequency of generator | |
| US6566901B2 (en) | Printed circuit board testing apparatus | |
| CN213337800U (en) | Residual current detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071212 Termination date: 20120601 |