CN201043959Y - Metal detector - Google Patents
Metal detector Download PDFInfo
- Publication number
- CN201043959Y CN201043959Y CNU2007200125036U CN200720012503U CN201043959Y CN 201043959 Y CN201043959 Y CN 201043959Y CN U2007200125036 U CNU2007200125036 U CN U2007200125036U CN 200720012503 U CN200720012503 U CN 200720012503U CN 201043959 Y CN201043959 Y CN 201043959Y
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- sensor
- utility
- model
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Abstract
The utility model provides a metal detector composed of an LC oscillator and a RC-Wien-Bridge oscillator. When operating this circuit, inductance or coupling coefficient will change once ferromagnetic substance passes the sensor. Specifically, different physical properties of iron ores and hazardous metals can not be identified with the same voltage change while iron ores or hazardous metals pass the sensor, so iron ores and hazardous metals can not be identified. The main points of the utility model lie in an amplifier, a coupler, a comparator, and an actuator. The utility model is characterized in a multivibarator, a constant current source, and a sensor. The sensor is composed of two inductance coils in series, and the central tap is connected with the output terminal of the constant current source. Constant oscillation signals generated from the output terminal of the sensor and the multivibrator is transferred to a next amplifier through a coupler. The utility model is used to detect ferrous metals in iron ores.
Description
Technical field
The utility model relates to a kind of metal detector, is particularly suitable for surveying the poisonous metal in the iron ore.
Background technology
Present metal detector is made up of LC oscillator or RC Wien-bridge oscillator, coupling mechanism, amplifier, comparer and actuator etc.Forms of sensor has telefault or transformer type sensor.The metal detector that the oscillator of LC, RC circuit form is formed has a common feature, as long as have ferromagnetic material to pass through the variation that sensor (sensor of form whatsoever) all can cause inductance or coupling coefficient exactly, cause the variation on oscillator voltage or the coupled voltages.Therefore this metal detector can not be distinguished actual quantities and imaginary quantity, no matter be the variation on eddy effect or the inductance, the output of circuit all is the variation on the voltage.Specifically it can not distinguish the physical characteristics of iron ore and poisonous metal, when iron ore and poisonous metal during by sensor, can produce same change in voltage, so it can not distinguish iron ore and poisonous metal.
Summary of the invention
At the deficiencies in the prior art, the purpose of this utility model is to provide a kind of metal detector that can avoid above-mentioned deficiency.
The purpose of this utility model is achieved in that it has coupling mechanism, amplifier, comparer and actuator, it is characterized in that: it also has multivibrator, constant current source and sensor, sensor is composed in series by two telefaults, its center tap connects the constant current source output terminal, the continuous oscillation signal that the output terminal of sensor and multivibrator output terminal form is through the amplifier of coupling mechanism to next stage, this signal is again through comparer, distinguish iron ore and poisonous metal by change in voltage, carry out by actuator.
The utility model is compared with the prior art scheme, and it makes oscillatory circuit more stable with constant current source power supply, and when iron ore process sensor, oscillator output has only the variation on the frequency, and the variation on the voltage is very little.When harmful metal passed through sensor, the change in voltage of oscillator was very obvious.The poisonous metal that is specially adapted in the ferrous metal mine iron ore is surveyed.It can carry out the obvious and effective differentiation to iron ore and the pig iron, electrician's iron, nonmagnetic metals such as Gao Meng, Gao Ge.
Description of drawings
Further specify the utility model below in conjunction with accompanying drawing.
Accompanying drawing is an electrical schematic diagram of the present utility model.
Embodiment
It has coupling mechanism A5 and A6, amplifier, comparer and actuator, it also has the multivibrator of being made up of the triode A1 of two symmetry connections and A2, constant current source and the sensor formed by amplifier A7 and triode A8, sensor is composed in series by two telefault A3 and A4, its center tap connects the output terminal of constant current source, two output terminals of sensor are connected respectively to two ends that inductance-coupled coil is elementary, the other end of two first lines of inductance-coupled coil is connected respectively on the collector of two triodes of multivibrator, a building-out capacitor C1 is arranged between the collector of two triodes, the continuous oscillation signal that multivibrator and sensor form is by the secondary amp.in that outputs to next stage of two inductance-coupled coils, this signal is again through comparer, distinguish iron ore and poisonous metal by change in voltage, carry out by actuator.
It makes oscillatory circuit more stable with constant current source power supply, and when iron ore process sensor, oscillator output has only the variation on the frequency, and the variation on the voltage is very little.When harmful metal passed through sensor, the change in voltage of oscillator was very obvious.The poisonous metal that is specially adapted in the ferrous metal mine iron ore is surveyed.It can carry out the obvious and effective differentiation to iron ore and the pig iron, electrician's iron, nonmagnetic metals such as Gao Meng, Gao Ge.And other metal detector can't replace.
Claims (2)
1. metal detector, it has coupling mechanism, amplifier, comparer and actuator, it is characterized in that:
It also has multivibrator, constant current source and sensor, sensor is composed in series by two telefaults, its center tap connects the constant current source output terminal, and the continuous oscillation signal that the output terminal of sensor and multivibrator output terminal form is through the amplifier of coupling mechanism to next stage.
2. according to the described metal detector of claim 1, it is characterized in that: two output terminals of sensor are connected respectively to two ends that inductance-coupled coil is elementary, the other end of two first lines of inductance-coupled coil is connected respectively on the collector of two triodes of multivibrator, and a building-out capacitor is arranged between the collector of two triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200125036U CN201043959Y (en) | 2007-06-08 | 2007-06-08 | Metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200125036U CN201043959Y (en) | 2007-06-08 | 2007-06-08 | Metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043959Y true CN201043959Y (en) | 2008-04-02 |
Family
ID=39258853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200125036U Expired - Fee Related CN201043959Y (en) | 2007-06-08 | 2007-06-08 | Metal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201043959Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487333A (en) * | 2016-10-14 | 2017-03-08 | 北京无线电计量测试研究所 | A kind of constant current ionizes energizing circuit |
-
2007
- 2007-06-08 CN CNU2007200125036U patent/CN201043959Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487333A (en) * | 2016-10-14 | 2017-03-08 | 北京无线电计量测试研究所 | A kind of constant current ionizes energizing circuit |
| CN106487333B (en) * | 2016-10-14 | 2019-11-05 | 北京无线电计量测试研究所 | A kind of constant current ionization energizing circuit |
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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: 20080402 Termination date: 20120608 |