CN204989502U - Metal detector - Google Patents
Metal detector Download PDFInfo
- Publication number
- CN204989502U CN204989502U CN201520647442.5U CN201520647442U CN204989502U CN 204989502 U CN204989502 U CN 204989502U CN 201520647442 U CN201520647442 U CN 201520647442U CN 204989502 U CN204989502 U CN 204989502U
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- China
- Prior art keywords
- metal detector
- wave signal
- frequency
- circuit
- telefault
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Abstract
The utility model discloses a metal detector. This metal detector includes a transmitting circuit and a receiving circuit, this transmitting circuit is used for launching the electromagnetic wave signal, this receiving circuit is used for receiving and measures the electromagnetic wave signal that reflects, a serial communication port, this transmitting circuit includes an inductance coils, this inductance coils is as the transmitting coil of transmission electromagnetic wave signal, this metal detector still includes a frequency of operation regulating circuit, this frequency of operation regulating circuit has an adjustable potentiometre and an electric capacity, this adjustable potentiometre is parallelly connected with this inductance coils after establishing ties with this electric capacity. The utility model discloses a metal detector just can make the user have under the condition of interference at external environment under the condition that only increases a small amount of cost, and in certain extent adjusts metal detector's frequency of operation by oneself to the problem that metal detector's work easily received the interference has been solved in the external environment of being out of office.
Description
Technical field
The utility model relates to a kind of metal detector.
Background technology
Metal detector relies on from launching in perform region and receiving electromagnetic instrument.When detecting metal target thing, require in metal detector lowered in field environment in the unforeseen situation of already present electromagnetic field situation in the wild, still can steady operation.
In prior art there is following problem in metal detector:
1, mutually produce interference when identical frequency of operation or the close metal detector of frequency of operation work in certain region simultaneously, occur false alarm.Through experiment, make the metal detector of two same frequencys, particularly the highly sensitive metal detector distance mutually not producing interference that simultaneously works will reach more than 20 meters.This brings considerable restraint to the steady operation of metal detector.
2, the metal detector worked in the wild is subject to the impact of peripheral electromagnetic field, and the higher hamonic wave of the power frequency of such as high-voltage power line or signal of communication be cellular base station signal such as, and at this moment metal detector there will be false alarm, and cannot normally work.
Above situation brings considerable restraint all can to the steady operation of metal detector, even makes it normally to work.
Utility model content
The technical problems to be solved in the utility model is easily subject to external electromagnetic field interference to overcome existing metal detector, when there is external interference, the work of metal detector is seriously limited, the defect that cannot normally work even completely, provides a kind of metal detector.
The utility model solves above-mentioned technical matters by following technical proposals:
A kind of metal detector, comprise a radiating circuit and a receiving circuit, this radiating circuit is used for electromagnetic signals, this receiving circuit is for receiving and measure the electromagnetic wave signal reflected, its feature is, this radiating circuit comprises a telefault, this telefault is used as the transmitting coil of electromagnetic signals, this metal detector also comprises a frequency of operation regulating circuit, this frequency of operation regulating circuit has an adjustable potentiometer and an electric capacity, and this adjustable potentiometer is in parallel with this telefault with after this capacitances in series.
The user of metal detector, by the current potential of the adjustable potentiometer in this frequency of operation regulating circuit of regulation and control, just initiatively can change frequency of operation within the specific limits, to enable to avoid extraneous undesired signal impact, continues normally to work.
Preferably, this telefault also with one capacitance group is in parallel, and this capacitance group has some electric capacity parallel with one another.
Preferably, this capacitance group is made up of three electric capacity in parallel.
Preferably, this adjustable potentiometer is connected to a knob, and this knob is for regulating this adjustable potentiometer.
Preferably, this metal detector also comprises a comparer, the electromagnetic wave signal that this comparer is launched for obtaining this telefault, and exports the square-wave signal synchronous with this electromagnetic wave signal obtained.
Preferably, this metal detector also comprises a single-chip microcomputer, and this single-chip microcomputer is for the square-wave signal that obtains this comparer and export and measure the frequency of square-wave signal.
Preferably, this metal detector also comprises a display device, the frequency that this display device records for showing this single-chip microcomputer.
Preferably, this display device is liquid crystal display.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can combination in any, obtains each preferred embodiments of the utility model.
Positive progressive effect of the present utility model is: metal detector of the present utility model is under the condition only increasing a small amount of cost, user just can be made to be able under the noisy condition of external environment, regulate the frequency of operation of metal detector voluntarily within the specific limits, thus solve the problem that in lowered in field environment, the work of metal detector is easily disturbed.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the metal detector of the utility model one preferred embodiment.
Fig. 2 is the circuit diagram of the partial circuit of the metal detector of the utility model one preferred embodiment.
Embodiment
Mode below by embodiment further illustrates the utility model, but is not therefore limited among described scope of embodiments by the utility model.
Shown in figure 1,2, the metal detector of the present embodiment, comprise radiating circuit 1, receiving circuit 2, this radiating circuit is used for electromagnetic signals, this receiving circuit is for receiving and measure the electromagnetic wave signal reflected, this radiating circuit 1 comprises a telefault 6L1, and this telefault is used as the transmitting coil of electromagnetic signals.
This metal detector also comprises a frequency of operation regulating circuit 3, and this frequency of operation regulating circuit 3 has an an adjustable potentiometer W6 and electric capacity C33, overall in parallel with this telefault 6L1 as one after this adjustable potentiometer W6 connects with this electric capacity C33.This adjustable potentiometer is connected to a knob, and this knob is for regulating this adjustable potentiometer.This telefault also with one capacitance group is in parallel, and this capacitance group is made up of three electric capacity 6C1,6C2, C27 in parallel.That is, after this telefault 6L1 and electric capacity 6C1,6C2, C27 parallel connection again with series connection after adjustable potentiometer W6 and electric capacity C33 in parallel, this part circuit determines in fact the frequency of operation of metal detector.At 6L1,6C1,6C2, C27 that this occurs etc., be the Reference numeral in accompanying drawing.
This metal detector also comprises a comparer U3A, single-chip microcomputer 4 and a display device 5, the electromagnetic wave signal that this comparer is launched for obtaining this telefault, and export the square-wave signal synchronous with this electromagnetic wave signal obtained, this single-chip microcomputer obtain this comparer export square-wave signal and after measuring the frequency of square-wave signal, the frequency recorded is shown, namely current frequency of operation by this display device.
The metal detector of the present embodiment, in use can by the current potential of the adjustable potentiometer in this frequency of operation regulating circuit of regulation and control, just initiatively can change frequency of operation within the specific limits, to enable to avoid extraneous undesired signal impact, continue normally to work.
After tested, when the metal detector applying the present embodiment carries out operation, in the narrow range of mutual spacing 1 meter, as long as the frequency of operation of reasonable adjusting metal detector, make frequency of operation difference more than the 200Hz of multiple stage metal detector, just can make it normal work simultaneously.
On the other hand, the metal detector of the present embodiment is when producing in enormous quantities, bring the material cost that increases in other words and cost of labor all very limited, also be minimum to the requirement of hardware, only need carry out very little change to circuit usually used in original metal detector, just can reach comparatively ideal Effect on Detecting.
Although the foregoing describe embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present utility model and essence, can make various changes or modifications to these embodiments, but these change and amendment all falls into protection domain of the present utility model.
Claims (8)
1. a metal detector, comprise a radiating circuit and a receiving circuit, this radiating circuit is used for electromagnetic signals, this receiving circuit is for receiving and measure the electromagnetic wave signal reflected, it is characterized in that, this radiating circuit comprises a telefault, this telefault is used as the transmitting coil of electromagnetic signals, this metal detector also comprises a frequency of operation regulating circuit, this frequency of operation regulating circuit has an adjustable potentiometer and an electric capacity, and this adjustable potentiometer is in parallel with this telefault with after this capacitances in series.
2. metal detector as claimed in claim 1, is characterized in that, this telefault also with one capacitance group is in parallel, and this capacitance group has some electric capacity parallel with one another.
3. metal detector as claimed in claim 2, is characterized in that, this capacitance group is made up of three electric capacity in parallel.
4. metal detector as claimed in claim 1, it is characterized in that, this adjustable potentiometer is connected to a knob, and this knob is for regulating this adjustable potentiometer.
5. as the metal detector in claim 1-4 as described in any one, it is characterized in that, this metal detector also comprises a comparer, the electromagnetic wave signal that this comparer is launched for obtaining this telefault, and exports the square-wave signal synchronous with this electromagnetic wave signal obtained.
6. metal detector as claimed in claim 5, it is characterized in that, this metal detector also comprises a single-chip microcomputer, and this single-chip microcomputer is for the square-wave signal that obtains this comparer and export and measure the frequency of square-wave signal.
7. metal detector as claimed in claim 6, it is characterized in that, this metal detector also comprises a display device, the frequency that this display device records for showing this single-chip microcomputer.
8. metal detector as claimed in claim 7, it is characterized in that, this display device is liquid crystal display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520647442.5U CN204989502U (en) | 2015-08-25 | 2015-08-25 | Metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520647442.5U CN204989502U (en) | 2015-08-25 | 2015-08-25 | Metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204989502U true CN204989502U (en) | 2016-01-20 |
Family
ID=55123857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520647442.5U Expired - Fee Related CN204989502U (en) | 2015-08-25 | 2015-08-25 | Metal detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204989502U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279439A (en) * | 2017-12-29 | 2018-07-13 | 清华大学 | Special-purpose metal detector towards buried corrosion pipeline |
| CN108387939A (en) * | 2017-12-29 | 2018-08-10 | 清华大学 | The special-purpose metal detector of chemical weapons is lost towards buried day |
-
2015
- 2015-08-25 CN CN201520647442.5U patent/CN204989502U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279439A (en) * | 2017-12-29 | 2018-07-13 | 清华大学 | Special-purpose metal detector towards buried corrosion pipeline |
| CN108387939A (en) * | 2017-12-29 | 2018-08-10 | 清华大学 | The special-purpose metal detector of chemical weapons is lost towards buried day |
| WO2019127842A1 (en) * | 2017-12-29 | 2019-07-04 | 清华大学 | Metal detector for buried abandoned japanese chemical weapons |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160825 |