CN206788388U - The adjustable metal detection circuit of sensitivity - Google Patents
The adjustable metal detection circuit of sensitivity Download PDFInfo
- Publication number
- CN206788388U CN206788388U CN201720309239.6U CN201720309239U CN206788388U CN 206788388 U CN206788388 U CN 206788388U CN 201720309239 U CN201720309239 U CN 201720309239U CN 206788388 U CN206788388 U CN 206788388U
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- chip microcomputer
- circuit module
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Abstract
The utility model discloses a kind of adjustable metal detection circuit of sensitivity, include single-chip microcomputer, power module, crystal oscillating circuit module, reset circuit module, switch control module, signal conversion circuit module, metal sensitive circuit module, indicator lamp and warning circuit module, crystal oscillating circuit module, reset circuit module and switch control module are connected with the input of single-chip microcomputer respectively, indicator lamp and warning circuit module are connected with the output end of single-chip microcomputer respectively, the input of signal conversion circuit module is connected with metal sensitive circuit module, the output end of signal conversion circuit module is connected with the input of single-chip microcomputer；Power module supplies power to single-chip microcomputer, signal conversion circuit module, metal sensitive circuit module, indicator lamp and warning circuit module.The utility model function is strong, low in energy consumption, available for detecting metal object, and sensitivity can be adjusted by switch control module, so as to the metal detection occasion suitable for different sensitivity demand.
Description
Technical field
Metal detection circuit design field is the utility model is related to, specifically a kind of adjustable metal detection electricity of sensitivity
Road.
Background technology
Currently, it is necessary to which the occasion for carrying out metal detection is more and more, railway station, airport, bus station, shopping mall market
Applied metal detection is needed to carry out safety inspection, college entrance examination, GRE and civil servant examination with occasions such as exhibitions venues
Etc. large-scale examination examinee admission when, be required to applied metal detecting function to examination forbidden band article check.It is meanwhile different
Application scenario, the sensitivity requirement of metal detection is differed.With the rapid development of nowadays electronic technology, electronics member device
The continuous renewal of part is regenerated, and a kind of low in energy consumption, measuring speed of design is fast and the metal detection circuit of adjustable detectivity
It is that there is boundless application value.
Utility model content
The purpose of this utility model is to provide a kind of adjustable metal detection circuit of sensitivity, when detecting metal to realize
Alarm at once, and detectivity can be adjusted by ganged switch.
The technical solution of the utility model is as follows：
A kind of adjustable metal detection circuit of sensitivity, it is characterised in that：Include single-chip microcomputer, power module, crystal oscillator electricity
Road module, reset circuit module, switch control module, signal conversion circuit module, metal sensitive circuit module, indicator lamp and report
Alert circuit module, described crystal oscillating circuit module, reset circuit module and switch control module are defeated with the single-chip microcomputer respectively
Enter end to be connected, the output end of described indicator lamp and warning circuit module respectively with the single-chip microcomputer is connected, the signal
The input of translation circuit module is connected with described metal sensitive circuit module, the output end of signal conversion circuit module with
The input of the single-chip microcomputer is connected；Described power module supplies power to the single-chip microcomputer, signal conversion circuit module, metal
Sensitive circuit module, indicator lamp and warning circuit module.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：The model of the single-chip microcomputer uses
MSP430F149。
The adjustable metal detection circuit of described sensitivity, it is characterised in that：Described power module can provide+5V and+
3.3V DC voltage.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：Described switch control module uses duplex
Switch.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：Described signal conversion circuit module uses
Voltage comparator LM393P.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：Described metal sensitive circuit module uses
Coil oscillating circuit.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：Described warning circuit module uses acousto-optic
Alarm.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：The specific connected mode of integrated circuit is：It is single
Piece machine MSP430F149 1 pin connects+3.3V DC voltages, and single-chip microcomputer MSP430F149 12 pin connect ganged switch S1 3 pin,
Ganged switch S2 2 pin ground connection, single-chip microcomputer MSP430F149 13 pin connect ganged switch S2 3 pin, ganged switch S3 2 pin
Ground connection, single-chip microcomputer MSP430F149 14 pin connect ganged switch S3 3 pin, and single-chip microcomputer MSP430F149 32 pin connect voltage ratio
1 pin compared with device LM393P, voltage comparator LM393P 4 pin connect+5V DC voltages, and voltage comparator LM393P 8 pin connect
Ground, voltage comparator LM393P 2 pin connect slide rheostat R9 sliding end, and it is straight that slide rheostat R9 both ends meet+5V respectively
Stream voltage and ground connection, voltage comparator LM393P 3 pin wiring circle L1 side, coil L1 opposite side connect duplex respectively
S1 4 pin and coil L2 side are switched, coil L2 opposite side connects ganged switch S2 4 pin and coil L3 side respectively,
Coil L3 another side joint ganged switch S3 4 pin, voltage comparator LM393P 3 pin are also connected with electric capacity C9 side and three poles
Pipe 2N3904 colelctor electrode, electric capacity C9 opposite side ground connection, ganged switch S1, S2 and S3 1 pin are grounded by electric capacity C10,
And by electric capacity C11 connecting triodes 2N3904 base stage, triode 2N3904 grounded emitter, triode 2N3904's
Ground level connects+5V DC voltages by resistance R7, and triode 2N3904 colelctor electrode connects+5V DC voltages, monolithic by resistance R8
Machine MSP430F149 33 pin connect triode S8550 ground level by resistance R6, and triode S8550 emitter stage connects+5V direct currents
Voltage, triode S8550 colelctor electrode connect buzzer BUZZER 1 pin, buzzer BUZZER 2 pin ground connection, single-chip microcomputer
MSP430F149 34 pin connect+5V DC voltages, single-chip microcomputer by resistance R5 and light emitting diode D4 series circuit
MSP430F149 46 pin connect+5V DC voltages, single-chip microcomputer by resistance R4 and light emitting diode D3 series circuit
MSP430F149 47 pin connect+5V DC voltages, single-chip microcomputer by resistance R3 and light emitting diode D2 series circuit
MSP430F149 48 pin connect+5V DC voltages, single-chip microcomputer by resistance R2 and light emitting diode D1 series circuit
MSP430F149 52 pin connect crystal oscillator XTAL 2 pin and are grounded by electric capacity C5, and single-chip microcomputer MSP430F149 53 pin connect crystal oscillator
XTAL 1 pin is simultaneously grounded by electric capacity C4, the 2 pin phases that single-chip microcomputer MSP430F149 58 pin pass through electric capacity C6 and button KEY1
Even, while single-chip microcomputer MSP430F149 58 pin are directly connected to button KEY1 1 pin, and button KEY1 1 pin is connect by resistance R1
Ground, single-chip microcomputer MSP430F149 63 pin ground connection, the negative pole ground connection of 9V batteries, the positive pole of 9V batteries connect 3 pin of voltage-stabiliser tube 7805,
3 pin of voltage-stabiliser tube 7805 are grounded by electric capacity C3, and the 1 pin ground connection of voltage-stabiliser tube 7805,2 pin of voltage-stabiliser tube 7805 pass through electric capacity C4
It is grounded with C5 parallel circuit, 2 pin output+5V DC voltages of voltage-stabiliser tube 7805, it is straight that voltage-stabiliser tube 1117-3.3 3 pin meet+5V
Flow voltage, voltage-stabiliser tube 1117-3.3 1 pin ground connection, voltage-stabiliser tube 1117-3.3 2 pin output+3.3V DC voltages, voltage-stabiliser tube
1117-3.3 3 pin and 2 pin are grounded by electric capacity C7 and C8 respectively.
The adjustable metal detection circuit of described sensitivity, it is characterised in that：Described ganged switch shares 3 in circuit
It is individual, for setting 3 kinds of different metal detection sensitivity.
The beneficial effects of the utility model：
1st, the utility model is practical.
2nd, for the utility model using MSP430F149 as microprocessor, disposal ability is strong, low in energy consumption.
3rd, the utility model is simple and quick, and the sensitivity of metal detection can be set by pressing ganged switch, is applicable
Operated in ordinary person.
4th, the coil oscillating circuit that the utility model uses, reaction speed is fast and measurement is accurate.
Brief description of the drawings
Fig. 1 is the utility model structural principle block diagram.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Referring to Fig. 1, a kind of adjustable metal detection circuit of sensitivity, include single-chip microcomputer 1, power module 2, crystal oscillating circuit
Module 3, reset circuit module 4, switch control module 5, signal conversion circuit module 6, metal sensitive circuit module 7, indicator lamp 8
It is defeated with single-chip microcomputer 1 respectively with warning circuit module 9, crystal oscillating circuit module 3, reset circuit module 4 and switch control module 5
Enter end to be connected, the output end of indicator lamp 8 and warning circuit module 9 respectively with single-chip microcomputer 1 is connected, signal conversion circuit mould
The input of block 6 is connected with metal sensitive circuit module 7, the output end of signal conversion circuit module 6 and the input of single-chip microcomputer 1
End is connected；Power module 2 supplies power to single-chip microcomputer 1, signal conversion circuit module 6, metal sensitive circuit module 7, indicator lamp 8
With warning circuit module 9.
The model of single-chip microcomputer 1 uses MSP430F149, is 16 super low-power consumption microprocessors, and cheap and function is strong
Greatly.
Power module 2 uses 9V battery powereds, and+5V and+3.3V DC voltages can be provided after voltage transformation.
Switch control module 5 uses ganged switch, including 3 ganged switches, corresponding sensitivity to differ, and presses double
The button of connection switch can be closed at or disconnect two branch roads, and different ganged switches corresponds to metal sensitive circuit mould when closing
The coil number of block 7 is different, i.e. metal detection sensitivity is different.
Signal conversion circuit module 6 uses voltage comparator LM393P, and sine wave can be changed into the square wave of same frequency.
Metal sensitive circuit module 7 uses coil oscillating circuit, and the number and parameter value of coil are as ganged switch 5 closes
Conjunction difference and change.
Warning circuit module 9 uses sound and light alarm, i.e. buzzer sends sound, and alarm lamp then flashes always.
Referring to Fig. 2, the specific connected mode of integrated circuit is：Single-chip microcomputer MSP430F149 1 pin connects+3.3V direct currents
Pressure, single-chip microcomputer MSP430F149 12 pin connect ganged switch S1 3 pin, ganged switch S2 2 pin ground connection, single-chip microcomputer
MSP430F149 13 pin connect ganged switch S2 3 pin, ganged switch S3 2 pin ground connection, single-chip microcomputer MSP430F149 14 pin
Ganged switch S3 3 pin are connect, single-chip microcomputer MSP430F149 32 pin connect voltage comparator LM393P 1 pin, voltage comparator
LM393P 4 pin connect+5V DC voltages, voltage comparator LM393P 8 pin ground connection, and voltage comparator LM393P 2 pin connect cunning
Dynamic rheostat R9 sliding end, slide rheostat R9 both ends meet+5V DC voltages and ground connection, voltage comparator LM393P respectively
3 pin wiring circle L1 side, coil L1 opposite side connects ganged switch S1 4 pin and coil L2 side, coil respectively
L2 opposite side connects ganged switch S2 4 pin and coil L3 side respectively, and the 4 of coil L3 another side joint ganged switch S3
Pin, voltage comparator LM393P 3 pin are also connected with electric capacity C9 side and triode 2N3904 colelctor electrode, and electric capacity C9's is another
Side is grounded, and ganged switch S1, S2 and S3 1 pin are grounded by electric capacity C10, and pass through electric capacity C11 connecting triodes
2N3904 base stage, triode 2N3904 grounded emitter, triode 2N3904 ground level connect+5V direct currents by resistance R7
Voltage, triode 2N3904 colelctor electrode connect+5V DC voltages by resistance R8, and single-chip microcomputer MSP430F149 33 pin pass through electricity
Resistance R6 connects triode S8550 ground level, and triode S8550 emitter stage connects+5V DC voltages, triode S8550 colelctor electrode
Connect buzzer BUZZER 1 pin, buzzer BUZZER 2 pin ground connection, single-chip microcomputer MSP430F149 34 pin by resistance R5 and
Light emitting diode D4 series circuit connects+5V DC voltages, and single-chip microcomputer MSP430F149 46 pin pass through resistance R4 and luminous two
Pole pipe D3 series circuit connects+5V DC voltages, and single-chip microcomputer MSP430F149 47 pin pass through resistance R3 and light emitting diode D2
Series circuit connect+5V DC voltages, the series connection that single-chip microcomputer MSP430F149 48 pin pass through resistance R2 and light emitting diode D1
Circuit connects+5V DC voltages, and single-chip microcomputer MSP430F149 52 pin connect crystal oscillator XTAL 2 pin and are grounded by electric capacity C5, monolithic
Machine MSP430F149 53 pin connect crystal oscillator XTAL 1 pin and are grounded by electric capacity C4, and single-chip microcomputer MSP430F149 58 pin lead to
Electric capacity C6 is crossed with button KEY1 2 pin to be connected, while single-chip microcomputer MSP430F149 58 pin are directly connected to button KEY1 1 pin,
Button KEY1 1 pin is grounded by resistance R1, single-chip microcomputer MSP430F149 63 pin ground connection, the negative pole ground connection of 9V batteries, 9V electricity
The positive pole in pond connects 3 pin of voltage-stabiliser tube 7805, and 3 pin of voltage-stabiliser tube 7805 are grounded by electric capacity C3, the 1 pin ground connection of voltage-stabiliser tube 7805,
2 pin of voltage-stabiliser tube 7805 are grounded by electric capacity C4 and C5 parallel circuit, 2 pin output+5V DC voltages of voltage-stabiliser tube 7805,
Voltage-stabiliser tube 1117-3.3 3 pin connect+5V DC voltages, voltage-stabiliser tube 1117-3.3 1 pin ground connection, voltage-stabiliser tube 1117-3.3 2 pin
Output+3.3V DC voltages, voltage-stabiliser tube 1117-3.3 3 pin and 2 pin are grounded by electric capacity C7 and C8 respectively.
Operation principle of the present utility model is：The detectivity that the needs of metal detection occasion are set is first according to, i.e.,
Ganged switch S1, S2 and S3 corresponding to pressing, it is sensitive that different ganged switches corresponds to the i.e. different detection of different coil numbers
Degree, and the pin being grounded when single-chip microcomputer MSP430F149 closes according to ganged switch goes to determine the sensitivity set, for monolithic
Machine MSP430F149 calls different contrast frequencies.Single-chip microcomputer MSP430F149 light different LED D1, D2 and D3 so as to
Prompt the grade of detectivity.When close to metal object, the frequency of the sine wave signal of oscillating circuit output where coil
Rate will change, and sine wave signal frequency is converted into data signal after over-voltage comparator LM393P, and passes to monolithic
Machine MSP430F149.Single-chip microcomputer MSP430F149 to by the digital signal frequency of reception and set contrast frequency contrast,
If showing to detect metal object, single-chip microcomputer MSP430F149 drives buzzer BUZZER by triode S8550
Pronunciation alarm and driving LED D4 carry out flashing light alarm, if equal, representative not yet detects gold in the range of current sensitivity degree
Category.
It is described above, only it is better embodiment of the present utility model, not the utility model is imposed any restrictions, it is every
Any simple modification, the change made according to the utility model technical spirit to embodiment of above, it is new to still fall within this practicality
Within the protection domain of type technical scheme.
Claims (9)
- A kind of 1. adjustable metal detection circuit of sensitivity, it is characterised in that：Include single-chip microcomputer, power module, crystal oscillating circuit Module, reset circuit module, switch control module, signal conversion circuit module, metal sensitive circuit module, indicator lamp and alarm Circuit module, the input with the single-chip microcomputer respectively of described crystal oscillating circuit module, reset circuit module and switch control module End is connected, and the output end of described indicator lamp and warning circuit module respectively with the single-chip microcomputer is connected, and the signal becomes The input for changing circuit module is connected with described metal sensitive circuit module, the output end of signal conversion circuit module and institute The input for stating single-chip microcomputer is connected；Described power module supplies power to the single-chip microcomputer, signal conversion circuit module, metal sensitization Inductive circuit module, indicator lamp and warning circuit module.
- 2. the adjustable metal detection circuit of sensitivity according to claim 1, it is characterised in that：The model of the single-chip microcomputer Using MSP430F149.
- 3. the adjustable metal detection circuit of sensitivity according to claim 1, it is characterised in that：Described power module can Offer+5V and+3.3V DC voltages.
- 4. the adjustable metal detection circuit of sensitivity according to claim 1, it is characterised in that：Described switch control mould Block uses ganged switch.
- 5. the adjustable metal detection circuit of sensitivity according to claim 1, it is characterised in that：Described signal conversion electricity Road module uses voltage comparator LM393P.
- 6. the adjustable metal detection circuit of sensitivity according to claim 1, it is characterised in that：Described metal sensitive electrical Road module uses coil oscillating circuit.
- 7. the adjustable metal detection circuit of sensitivity according to claim 1, it is characterised in that：Described warning circuit mould Block uses sound and light alarm.
- 8. the adjustable metal detection circuit of sensitivity according to Claims 2 or 3 or 4 or 5 or 6 or 7, it is characterised in that： The specific connected mode of integrated circuit is：Single-chip microcomputer MSP430F149 1 pin connects+3.3V DC voltages, single-chip microcomputer MSP430F149 12 pin connect ganged switch S1 3 pin, ganged switch S2 2 pin ground connection, single-chip microcomputer MSP430F149 13 pin Ganged switch S2 3 pin, ganged switch S3 2 pin ground connection are connect, single-chip microcomputer MSP430F149 14 pin connect the 3 of ganged switch S3 Pin, single-chip microcomputer MSP430F149 32 pin connect voltage comparator LM393P 1 pin, and it is straight that voltage comparator LM393P 4 pin meet+5V Voltage, voltage comparator LM393P 8 pin ground connection are flowed, voltage comparator LM393P 2 pin connect slide rheostat R9 sliding end, Slide rheostat R9 both ends connect+5V DC voltages and ground connection respectively, and the one of voltage comparator LM393P 3 pin wiring circle L1 Side, coil L1 opposite side connect ganged switch S1 4 pin and coil L2 side respectively, and coil L2 opposite side connects double respectively Connection switch S2 4 pin and coil L3 side, coil L3 another side joint ganged switch S3 4 pin, voltage comparator LM393P 3 pin be also connected with electric capacity C9 side and triode 2N3904 colelctor electrode, electric capacity C9 opposite side ground connection, ganged switch S1, S2 and S3 1 pin is grounded by electric capacity C10, and passes through electric capacity C11 connecting triodes 2N3904 base stage, triode 2N3904 Grounded emitter, triode 2N3904 ground level connects+5V DC voltages by resistance R7, and triode 2N3904 colelctor electrode leads to To cross resistance R8 and connect+5V DC voltages, single-chip microcomputer MSP430F149 33 pin connect triode S8550 ground level by resistance R6, and three Pole pipe S8550 emitter stage connects+5V DC voltages, and triode S8550 colelctor electrode connects buzzer BUZZER 1 pin, buzzer BUZZER 2 pin ground connection, single-chip microcomputer MSP430F149 34 pin meet+5V by resistance R5 and light emitting diode D4 series circuit DC voltage, single-chip microcomputer MSP430F149 46 pin connect+5V direct currents by resistance R4 and light emitting diode D3 series circuit Pressure, single-chip microcomputer MSP430F149 47 pin connect+5V DC voltages, monolithic by resistance R3 and light emitting diode D2 series circuit Machine MSP430F149 48 pin connect+5V DC voltages, single-chip microcomputer by resistance R2 and light emitting diode D1 series circuit MSP430F149 52 pin connect crystal oscillator XTAL 2 pin and are grounded by electric capacity C5, and single-chip microcomputer MSP430F149 53 pin connect crystal oscillator XTAL 1 pin is simultaneously grounded by electric capacity C4, the 2 pin phases that single-chip microcomputer MSP430F149 58 pin pass through electric capacity C6 and button KEY1 Even, while single-chip microcomputer MSP430F149 58 pin are directly connected to button KEY1 1 pin, and button KEY1 1 pin is connect by resistance R1 Ground, single-chip microcomputer MSP430F149 63 pin ground connection, the negative pole ground connection of 9V batteries, the positive pole of 9V batteries connect 3 pin of voltage-stabiliser tube 7805, 3 pin of voltage-stabiliser tube 7805 are grounded by electric capacity C3,1 pin of voltage-stabiliser tube 7805 ground connection, 2 pin of voltage-stabiliser tube 7805 by electric capacity C4 and C5 parallel circuit ground connection, 2 pin output+5V DC voltages of voltage-stabiliser tube 7805, voltage-stabiliser tube 1117-3.3 3 pin connect+5V direct currents Voltage, voltage-stabiliser tube 1117-3.3 1 pin ground connection, voltage-stabiliser tube 1117-3.3 2 pin output+3.3V DC voltages, voltage-stabiliser tube 1117- 3.3 3 pin and 2 pin are grounded by electric capacity C7 and C8 respectively.
- 9. the adjustable metal detection circuit of sensitivity according to claim 4, it is characterised in that：Described ganged switch exists 3 are shared in circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720309239.6U CN206788388U (en) | 2017-03-28 | 2017-03-28 | The adjustable metal detection circuit of sensitivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720309239.6U CN206788388U (en) | 2017-03-28 | 2017-03-28 | The adjustable metal detection circuit of sensitivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206788388U true CN206788388U (en) | 2017-12-22 |
Family
ID=60705547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720309239.6U Expired - Fee Related CN206788388U (en) | 2017-03-28 | 2017-03-28 | The adjustable metal detection circuit of sensitivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206788388U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270580A (en) * | 2018-11-19 | 2019-01-25 | 永州市诺方舟电子科技有限公司 | One kind is chargeable, sensitivity is adjustable, highly sensitive hand-held metal detector |
-
2017
- 2017-03-28 CN CN201720309239.6U patent/CN206788388U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270580A (en) * | 2018-11-19 | 2019-01-25 | 永州市诺方舟电子科技有限公司 | One kind is chargeable, sensitivity is adjustable, highly sensitive hand-held metal detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171222 Termination date: 20190328 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |