CN203535202U - High sensitivity electromagnetic field sensor - Google Patents
High sensitivity electromagnetic field sensor Download PDFInfo
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- CN203535202U CN203535202U CN201320735375.3U CN201320735375U CN203535202U CN 203535202 U CN203535202 U CN 203535202U CN 201320735375 U CN201320735375 U CN 201320735375U CN 203535202 U CN203535202 U CN 203535202U
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- resistance
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- operational amplifier
- low noise
- diode
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Abstract
The utility model discloses a high sensitivity electromagnetic field sensor, comprising a first resistor to a seventh resistor, a first capacitor to a sixth capacitor, a first diode, a second diode, a low-noise operational amplifier, an ammeter, a mobile phone detection head, an inductor and a battery. Compared with the prior art, the electromagnetic field sensor is advantaged by simple circuit structure, few electronic components, low power consumption, and low cost, in particular, the electromagnetic field sensor is high in sensitivity, and has value for popularization and promotion.
Description
Technical field
The utility model relates to a kind of emf sensor, relates in particular to a kind of high sensitive electromagnetic field sensor.
Background technology
Magnetic field sensor is the device that the amount of various magnetic field and variation thereof can be transformed into electric signal output.All there is the relevant information in Huo Yu magnetic field, magnetic field in many places of nature and human society life.The magnetic field that utilizes the artificial permanent magnet arranging to produce, can be used as the carrier of much information perhaps.Therefore, survey, gather, store, change, reappear and monitor the task of the various information of carrying in various magnetic field and magnetic field, naturally just drop on it magnetic field sensor.In current information society, magnetic field sensor has become indispensable base components in infotech and information industry.At present, people have developed the magnetic field sensor that utilizes various physics, chemistry and biological effect, and in the various aspects of scientific research, production and social life, are used widely, and bear the task of probing into all information.
Previous magnetic field sensor, be follow magnetic measurement apparatus progress and progressively development.In numerous survey magnetism methods, mostly Magnetic Field is become to electric signal and measure.In magnetic measurement apparatus, " probe " or " sampler " is exactly magnetic field sensor.Along with the develop rapidly of information industry, industrial automation, communications and transportation, Power Electronic Technique, office automation, household electrical appliance, Medical Instruments etc. and popularizing of Iron ore concentration, the non-electric parameter that need need be measured and be controlled with a large amount of sensors, convert to can with the signal of computing machine compatibility, as their input signal, this,, with regard to chance being provided to the fast development of magnetic field sensor, has formed appreciable magnetic field sensor industry.And emf sensor complex structure of the prior art, cost is high, power consumption is high, especially sensitivity is lower, is unfavorable for universal and promotes.
Utility model content
The purpose of this utility model provides a kind of high sensitive electromagnetic field sensor with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose: the utility model comprises the first resistance to the seven resistance, the first electric capacity to the six electric capacity, the first diode, the second diode, low noise operational amplifier, reometer, mobile phone detection head, inductor and battery, the anodal while of described battery and the first end of described the 6th electric capacity, the first end of described the 7th resistance, the positive pole of described low noise operational amplifier is connected with the first end of described the first resistance, the negative pole while of described battery and the second end of described the 6th electric capacity, the first end of described the 5th electric capacity, the emitter of described triode, the first end of described mobile phone detection head, the negative pole of described low noise operational amplifier, the first end of described the first resistance is connected with the first end of described the second electric capacity, the second end of described the 5th electric capacity is connected with the positive pole of described the second diode and the first end of described reometer simultaneously, the second end of described reometer is connected with the negative pole of described the first diode, the anodal while of described the first diode and the second end of described the 7th resistance, the first end of described the 6th resistance, the negative pole of described the second diode is connected with the collector of described triode, the base stage of described triode is connected with the first end of described the 4th resistance with the second end of described the 6th resistance simultaneously, the second end of described the 4th resistance is connected with the first end of described the 4th electric capacity with the first end of described the 5th resistance simultaneously, the second end of described the 5th resistance is connected with the second end of described mobile phone detection head, the second end while of described the 4th electric capacity and the output terminal of described low noise operational amplifier, the first end of described the second resistance is connected with the first end of described the 3rd electric capacity, the positive signal input end while of described low noise operational amplifier and the second end of described the second resistance, the second end of described the 3rd electric capacity is connected with the first end of described the first electric capacity, the negative signal input end while of described low noise operational amplifier and the second end of described the first resistance, the second end of described the first resistance, the second end of described the second electric capacity and the first end of described inductor are connected, the second end of described inductor is connected with the second end of described the first electric capacity.
Particularly, described low noise operational amplifier is the low noise operational amplifier of model LF351.
The beneficial effects of the utility model are: the utility model is a kind of high sensitive electromagnetic field sensor, compared with prior art, the utlity model has circuit structure simple, adopt electronic component advantage few, low in energy consumption, with low cost, especially of the present utility model highly sensitive, there is the value of penetration and promotion.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail: as shown in Figure 1: the utility model comprises that the first resistance R 1 is to the 7th resistance R 7, the first capacitor C 1 is to the 6th capacitor C 6, the first diode D1, the second diode D2, low noise operational amplifier IC, reometer A, mobile phone detection head Z, inductor L and battery E, the anodal while of battery E and the first end of the 6th capacitor C 6, the first end of the 7th resistance R 7, the positive pole of low noise operational amplifier IC is connected with the first end of the first resistance R 1, the negative pole while of battery E and the second end of the 6th capacitor C 6, the first end of the 5th capacitor C 5, the emitter of triode VT, the first end of mobile phone detection head Z, the negative pole of low noise operational amplifier IC, the first end of the first resistance R 1 is connected with the first end of the second capacitor C 2, the second end of the 5th capacitor C 5 is connected with the first end of reometer A with the positive pole of the second diode D2 simultaneously, the second end of reometer A is connected with the negative pole of the first diode D1, the anodal while of the first diode D1 and the second end of the 7th resistance R 7, the first end of the 6th resistance R 6, the negative pole of the second diode D2 is connected with the collector of triode VT, the base stage of triode VT is connected with the first end of the 4th resistance R 4 with the second end of the 6th resistance R 6 simultaneously, the second end of the 4th resistance R 4 is connected with the first end of the 4th capacitor C 4 with the first end of the 5th resistance R 5 simultaneously, the second end of the 5th resistance R 5 is connected with the second end of mobile phone detection head Z, the second end while of the 4th capacitor C 4 and the output terminal of low noise operational amplifier IC, the first end of the second resistance R 2 is connected with the first end of the 3rd capacitor C 3, the positive signal input end while of low noise operational amplifier IC and the second end of the second resistance R 2, the second end of the 3rd capacitor C 3 is connected with the first end of the first capacitor C 1, the negative signal input end while of low noise operational amplifier IC and the second end of the first resistance R 1, the second end of the first resistance R 1, the second end of the second electric capacity is connected with the first end of inductor L, the second end of inductor L is connected with the second end of the first capacitor C 1, low noise operational amplifier IC is the low noise operational amplifier of model LF351.
As shown in Figure 1: the utility model can be responded to 40Hz to the electromagnetic field of 140Hz, the part that the form of low noise operational amplifier IC and associated component is gone up, amplification for the inductor L of sensory field and execution necessity of low noise operational amplifier IC, if the electromagnetic field of finding is at audio frequency range, it can be connected with mobile phone by mobile phone detection head Z is also the arrangement of accurate measure signal intensity, triode VT carries out extra amplification pickoff signals, with driving circuit figure.
Claims (2)
1. a high sensitive electromagnetic field sensor, it is characterized in that: comprise the first resistance to the seven resistance, the first electric capacity to the six electric capacity, the first diode, the second diode, low noise operational amplifier, reometer, mobile phone detection head, inductor and battery, the anodal while of described battery and the first end of described the 6th electric capacity, the first end of described the 7th resistance, the positive pole of described low noise operational amplifier is connected with the first end of described the first resistance, the negative pole while of described battery and the second end of described the 6th electric capacity, the first end of described the 5th electric capacity, the emitter of described triode, the first end of described mobile phone detection head, the negative pole of described low noise operational amplifier, the first end of described the first resistance is connected with the first end of described the second electric capacity, the second end of described the 5th electric capacity is connected with the positive pole of described the second diode and the first end of described reometer simultaneously, the second end of described reometer is connected with the negative pole of described the first diode, the anodal while of described the first diode and the second end of described the 7th resistance, the first end of described the 6th resistance, the negative pole of described the second diode is connected with the collector of described triode, the base stage of described triode is connected with the first end of described the 4th resistance with the second end of described the 6th resistance simultaneously, the second end of described the 4th resistance is connected with the first end of described the 4th electric capacity with the first end of described the 5th resistance simultaneously, the second end of described the 5th resistance is connected with the second end of described mobile phone detection head, the second end while of described the 4th electric capacity and the output terminal of described low noise operational amplifier, the first end of described the second resistance is connected with the first end of described the 3rd electric capacity, the positive signal input end while of described low noise operational amplifier and the second end of described the second resistance, the second end of described the 3rd electric capacity is connected with the first end of described the first electric capacity, the negative signal input end while of described low noise operational amplifier and the second end of described the first resistance, the second end of described the first resistance, the second end of described the second electric capacity and the first end of described inductor are connected, the second end of described inductor is connected with the second end of described the first electric capacity.
2. high sensitive electromagnetic field sensor according to claim 1, is characterized in that: described low noise operational amplifier is the low noise operational amplifier of model LF351.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320735375.3U CN203535202U (en) | 2013-11-21 | 2013-11-21 | High sensitivity electromagnetic field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320735375.3U CN203535202U (en) | 2013-11-21 | 2013-11-21 | High sensitivity electromagnetic field sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535202U true CN203535202U (en) | 2014-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320735375.3U Expired - Fee Related CN203535202U (en) | 2013-11-21 | 2013-11-21 | High sensitivity electromagnetic field sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203535202U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884351A (en) * | 2019-03-02 | 2019-06-14 | 西安培华学院 | A kind of computer detection of electrons board |
-
2013
- 2013-11-21 CN CN201320735375.3U patent/CN203535202U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884351A (en) * | 2019-03-02 | 2019-06-14 | 西安培华学院 | A kind of computer detection of electrons board |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20141121 |
|
| EXPY | Termination of patent right or utility model |