CN208092214U - Open side type based on Bluetooth transmission is used for the device of ferromagnetic detection - Google Patents
Open side type based on Bluetooth transmission is used for the device of ferromagnetic detection Download PDFInfo
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- CN208092214U CN208092214U CN201820194294.XU CN201820194294U CN208092214U CN 208092214 U CN208092214 U CN 208092214U CN 201820194294 U CN201820194294 U CN 201820194294U CN 208092214 U CN208092214 U CN 208092214U
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Abstract
The utility model discloses the devices that a kind of open side type based on Bluetooth transmission is used for ferromagnetic detection, the output end of fluxgate pumping signal module and the input terminal of fluxgate sensor connect, the output end of fluxgate sensor and the input terminal of speed A/D converter connect, the output end of speed A/D converter is connect with the input terminal of DSP digital signal processing units, DSP digital signal processing units are connect with power amplifier, power amplifier connects intelligent alarm and LED light, DSP digital signal processing units are connect with bluetooth communication module, bluetooth communication module is connected with mobile terminal.Open side type of the utility model based on Bluetooth transmission is used for the device of ferromagnetic detection, and DSP digital signal processing units are connect by bluetooth communication module with mobile terminal, and bidirectional transfer of information may be implemented；And using the method for DSP digital processings, the manufacture difficulty of fluxgate signal-processing board is substantially reduced, the performance of product is promoted, while improving accuracy of detection.
Description
Technical field
The utility model is related to ferromagnetic detection technology field, specifically a kind of open side type based on Bluetooth transmission is used for
The device of ferromagnetic detection.
Background technology
In the early 1930s, there is Fluxgate Technique, it can measure constant and low frequency low-intensity magnetic field, basic principle
Be using the soft magnetic materials magnetic core of high magnetic permeability, low-coercivity be made induction coil be energized after, appearance become with environmental magnetic field
Even-order harmonic component potential behavior, by high performance fluxgate modulate circuit measure even-order harmonic component, to measure
The size of environmental magnetic field.Fluxgate sensor be using high conducting magnet core in tested magnetic field under the saturation activation of alternating magnetic field,
The non-linear relation of its magnetic induction intensity and magnetic field intensity measures a kind of sensor of low-intensity magnetic field.With other types magnetic measurement apparatus
It compares, fluxgate sensor has resolving power height, measures low-intensity magnetic field range component etc. that is wide, reliable, can directly measuring magnetic field
Feature.General ferromagnetics object is all the alloy using iron-cobalt-nickel base.After the advent of fluxgate magnetometry soon, in second of generation
Just be applied to detect a mine in boundary's Great War, visit it is latent etc., be widely used in again after the war ground magnetic field research, aeromagnetic detection,
Shake the fields such as prediction research, subterranean deposit exploration, biomedical research, interplanetary magnetic survey.Fluxgate sensor is still measured with it
The remarkable advantages such as high sensitivity, high temperature resistant, split axle measurement, low in energy consumption, simple in structure, are widely used in weak magnetic measurement neck
Domain.
Conventional fluxgate signal processing circuit is to carry out analyzing processing to signal by analog circuit, this results in locating
It is extremely complex to manage circuit board making.And since it is realized using analog circuit, influenced by the characteristic of electronic device, it can introduce
Many noises are easy to be influenced by temperature drift, and the time of integration of correlation detector is limited, and accuracy of detection is caused to be limited
System.
Current ferromagnetic detection device is only limitted to detection signal, feedback signal, cannot achieve the transmitted in both directions of information.
Utility model content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, solve presently, there are technology lack
It falls into, the utility model provides the device that a kind of open side type based on Bluetooth transmission is used for ferromagnetic detection.
Technical solution used by the utility model is：
Open side type based on Bluetooth transmission is used for the device of ferromagnetic detection, including fluxgate pumping signal module, fluxgate
Sensor, speed A/D converter, DSP digital signal processing units, power amplification circuit, intelligent alarm, LED light and bluetooth are logical
Module is interrogated, the output end of the fluxgate pumping signal module is connect with the input terminal of the fluxgate sensor, the magnetic flux
The output end of door sensor is connect with the input terminal of the speed A/D converter, the output end of the speed A/D converter with it is described
The input terminal of DSP digital signal processing units connects, and the DSP digital signal processing units are connect with the power amplifier,
The power amplifier connection intelligent alarm and LED light, the DSP digital signal processing units connect with bluetooth communication module
It connects, the bluetooth communication module is connected with mobile terminal.
Preferably, described device is column structure, described device includes a shell, the fluxgate pumping signal mould
Block, fluxgate sensor, speed A/D converter, DSP digital signal processing units, power amplification circuit, intelligent alarm and LED
Lamp is placed in the stand-alone shell.
Preferably, the quantity of the fluxgate sensor is three, the fluxgate sensor includes the first magnetic flux
Door sensor, the second fluxgate sensor and third fluxgate sensor.
Preferably, the shell include a cylinder, first fluxgate sensor be placed in capital or its near, institute
State the second fluxgate sensor be placed among column or its near, the third fluxgate sensor be placed in column bottom or its near.
Preferably, the cylinder top is LED light, the cylinder is equipped with fluxgate pumping signal module, high speed
AD converters, DSP digital signal processing units, power amplification circuit, power supply changeover device, external interface and intelligent alarm, institute
It states column bottom and power interface, power interface of the 220V AC powers from column bottom access device is installed.
Preferably, the intelligent alarm includes voice guard and alarm lamp.
Further, described device further includes fluxgate signal processing circuit, and the fluxgate signal processing circuit includes
Frequency-selective amplifier circuit, phase-sensitive detector circuit and integration filter circuit.
Further, the frequency-selective amplifier circuit includes first resistor R1, second resistance R2,3rd resistor R3, first
Operational amplifier U1, the first capacitance C1 and the second capacitance C2, the input terminal of the first resistor R1 are connect with the 5th resistance R5, institute
The other end for stating first resistor R1 is connect with the reverse input end of second resistance R2 and the first operational amplifier U1 respectively, and described
The other end of two resistance R2 by the second capacitance R2 ground connection, the other end of the second resistance R2 also by 3rd resistor R3 with
The input terminal of phase-sensitive detector circuit connects, the positive input ground connection of the first operational amplifier U1, first operation
The output end of amplifier U1 is connect with the input terminal of phase-sensitive detector circuit, and the first capacitance C1 is parallel to the second resistance
Between R2 and 3rd resistor R3.
Further, the phase-sensitive detector circuit includes that third capacitance C3, the 4th resistance R4 and 3 road alternative simulations are opened
It closes, one end of the third capacitance C3 is connect with the output end of frequency-selective amplifier circuit, and the other end of the third capacitance C3 is logical
It crosses the 4th resistance R4 to connect with the Z input terminals of 3 road alternative analog switches, the Z0 output ends of the 3 road alternative analog switch
It is connect with the reverse input end of second operational amplifier U2, the Z1 output ends of the 3 road alternative analog switch and the second operation
The positive input of amplifier U2 connects, and the Z1 output ends of the 3 road alternative analog switch are with second operational amplifier U2's
It is grounded while positive input.
Further, the integration filter circuit includes second operational amplifier U2 and the 4th capacitance C4, and the described 4th
Capacitance C4 is parallel between the reverse input end and output end of second operational amplifier U2, the second operational amplifier U2's
Output end is also connect with the other end of the 5th resistance R5, the output end output digit signals of the second operational amplifier U2.
Compared with prior art, a kind of open side type based on Bluetooth transmission disclosed by the utility model is for ferromagnetic detection
Device, DSP digital signal processing units are connect by bluetooth communication module with mobile terminal, and bidirectional transfer of information may be implemented,
The reception of detection information may be implemented, and the systematic parameters such as alarm, sensitivity can be adjusted by mobile terminal.
The utility model uses DSP digital signal processing units, to the collected changes of magnetic field of fluxgate sensor, Men Kai
It the digital signals such as closes, swarm into be post-processed in real time, realizing ferromagnetics detection and intelligentized alert process；
Fluxgate original signal is adopted using high speed FPGA and ultra high speed A/D conversion device using the method for DSP digital processings
Then sample carries out waveform fitting again, and the second harmonic of magnetic flux gate signal is found out by mathematical computations, and periphery is measured to reach
The purpose in magnetic field substantially reduces the manufacture difficulty of fluxgate signal-processing board, promotes the performance of product, while improving detection essence
Degree；The metal object containing ferromagnetics, and the non-metallic object containing ferromagnetics can be detected, including is implanted in ferromagnetics in human body
Object.
The utility model is described in further detail below in conjunction with the accompanying drawings.
Description of the drawings
Fig. 1 is system structure signal of open side type of the utility model based on Bluetooth transmission for the device of ferromagnetic detection
Figure.
Fig. 2 is fluxgate signal processing of open side type of the utility model based on Bluetooth transmission for the device of ferromagnetic detection
Circuit diagram.
In figure, 1- the first fluxgate sensor 2- the second fluxgate sensor 3- third fluxgate sensors 4- intelligence
Alarm 5-LED lamp 6- mobile terminals.
Specific implementation mode
In order to deepen the understanding to the utility model, the utility model is made with reference to the accompanying drawings and examples further detailed
Thin explanation.Following embodiment is only used for clearly illustrating the technical solution of the utility model, and cannot be limited with this
The scope of protection of the utility model.
As shown in Figure 1, open side type of the utility model based on Bluetooth transmission is used for the device of ferromagnetic detection, including fluxgate
Pumping signal module, fluxgate sensor, speed A/D converter, DSP digital signal processing units, power amplification circuit, intelligence
Alarm, LED light and bluetooth communication module, the output end of fluxgate pumping signal module and the input terminal of fluxgate sensor connect
Connect, the input terminal of the output end of fluxgate sensor and speed A/D converter connects, the output end of speed A/D converter with it is described
The input terminal of DSP digital signal processing units connects, and DSP digital signal processing units are connect with the power amplifier, power
Amplifier connects intelligent alarm and LED light, DSP digital signal processing units are connect with bluetooth communication module, bluetooth communication mould
Block is connected with mobile terminal.
In the utility model, device is column structure, and device includes a shell, fluxgate pumping signal module, fluxgate
Sensor, speed A/D converter, DSP digital signal processing units, power amplification circuit, intelligent alarm and LED light are placed in
In the stand-alone shell.
In the utility model, the quantity of fluxgate sensor is three, and fluxgate sensor is sensed including the first fluxgate
Device, the second fluxgate sensor and third fluxgate sensor.
In the utility model, shell include a cylinder, the first fluxgate sensor be placed in capital or its near, the second magnetic flux
Door sensor be placed among column or its near, third fluxgate sensor be placed in column bottom or its near.
In the utility model, cylinder top is LED light, and cylinder is equipped with fluxgate pumping signal module, ultra high speed A/D conversion
Device, DSP digital signal processing units, power amplification circuit, power supply changeover device, external interface and intelligent alarm, the installation of column bottom
There are power interface, power interface of the 220V AC powers from column bottom access device.
In the utility model, intelligent alarm includes voice guard and alarm lamp.
As shown in Fig. 2, device further includes fluxgate signal processing circuit, fluxgate signal processing circuit includes frequency-selecting amplification
Device circuit, phase-sensitive detector circuit and integration filter circuit.
As shown in Fig. 2, frequency-selective amplifier circuit includes first resistor R1, second resistance R2,3rd resistor R3, the first operation
Amplifier U1, the first capacitance C1 and the second capacitance C2, the input terminal of first resistor R1 are connect with the 5th resistance R5, first resistor R1
The other end connect respectively with the reverse input end of second resistance R2 and the first operational amplifier U1, second resistance R2's is another
End also passes through the input of 3rd resistor R3 and phase-sensitive detector circuit by the second capacitance R2 ground connection, the other end of second resistance R2
End connection, the positive input ground connection of the first operational amplifier U1, the output end and phase-sensitive detector of the first operational amplifier U1
The input terminal of circuit connects, and the first capacitance C1 is parallel between second resistance R2 and 3rd resistor R3.
As shown in Fig. 2, phase-sensitive detector circuit includes third capacitance C3, the 4th resistance R4 and 3 road alternative analog switches,
One end of third capacitance C3 is connect with the output end of frequency-selective amplifier circuit, and the other end of third capacitance C3 passes through the 4th resistance
R4 is connect with the Z input terminals of 3 road alternative analog switches, the Z0 output ends and the second operation amplifier of 3 road alternative analog switches
The reverse input end of device U2 connects, and the Z1 output ends of 3 road alternative analog switches are inputted with the positive of second operational amplifier U2
End connection, the positive input of the Z1 output ends and second operational amplifier U2 of 3 road alternative analog switches while, are grounded.
As shown in Fig. 2, integration filter circuit includes second operational amplifier U2 and the 4th capacitance C4, the 4th capacitance C4 is simultaneously
It is coupled between the reverse input end and output end of second operational amplifier U2, the output end of second operational amplifier U2 is also with the 5th
The other end of resistance R5 connects, the output end output signal of second operational amplifier U2.
For the environmental magnetic field intensity that fluxgate detects after above several links, output one is proportional to environmental magnetic field
D. c. voltage signal, this signal is sent to high-accuracy data acquisition part and handled.
The sensor used in the utility model is simple component digitlization fluxgate.This sensor uses square wave or triangular wave
The frequency range of excitation, driving voltage is 1k~10kHz, and driving voltage valid value range is that 2~3.2V (surveys L, R with multimeter
Between voltage), recommend driving voltage frequency be 5kHz, the square wave that amplitude is 5V.Meanwhile the frequency of phase sensitive detection is driving voltage
It twice, is divided using homologous oscillator and generates excitation, waveform detection, the phase bit comparison of waveform is accurate.
L, R of simple component fluxgate sensor are excitation end, connect the both ends of driving voltage, interchangeable, and the ends M are believed for fluxgate
Number output end, connect the frequency-selective amplifier of fluxgate signal conditioning circuit.At a distance from sensor is between fluxgate modulate circuit
When distant (100 meters of L ﹥), need suitably to amplify pumping signal, ensure that fluxgate sensor is operated in optimum state.
It is noted that embodiment described above is to the illustrative and not limiting of technical solutions of the utility model, affiliated skill
The equivalent replacement of art field those of ordinary skill or other modifications made according to the prior art, as long as it is new not exceed this practicality
The thinking and range of type technical solution, should be included within the interest field required by the utility model.
Claims (10)
1. the open side type based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Including fluxgate pumping signal mould
Block, fluxgate sensor, speed A/D converter, DSP digital signal processing units, power amplification circuit, intelligent alarm, LED
Lamp and bluetooth communication module, the output end of the fluxgate pumping signal module connect with the input terminal of the fluxgate sensor
It connects, the output end of the fluxgate sensor is connect with the input terminal of the speed A/D converter, the speed A/D converter
Output end is connect with the input terminal of the DSP digital signal processing units, the DSP digital signal processing units and the power
Amplifying circuit connects, power amplification circuit connection intelligent alarm and LED light, the DSP digital signal processing units with
Bluetooth communication module connects, and the bluetooth communication module is connected with mobile terminal.
2. the open side type according to claim 1 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
It is column structure to state device, and described device includes a shell, the fluxgate pumping signal module, fluxgate sensor, high speed
AD converter, DSP digital signal processing units, power amplification circuit, intelligent alarm and LED light are placed in shell.
3. the open side type according to claim 2 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
The quantity for stating fluxgate sensor is three, and the fluxgate sensor includes the first fluxgate sensor, the second fluxgate biography
Sensor and third fluxgate sensor.
4. the open side type according to claim 3 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
State shell include a cylinder, first fluxgate sensor be placed in capital or its near, second fluxgate sensor is set
Among the column or near it, the third fluxgate sensor be placed in column bottom or its near.
5. the open side type according to claim 4 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
It is LED light to state cylinder top, and the cylinder is equipped with fluxgate pumping signal module, speed A/D converter, at DSP digital signals
Reason unit, power amplification circuit, power supply changeover device, external interface and intelligent alarm, the column bottom are equipped with power interface,
Power interface of the 220V AC powers from column bottom access device.
6. the open side type according to claim 1 or 4 based on Bluetooth transmission is used for the device of ferromagnetic detection, feature exists
In：The intelligent alarm includes voice guard and alarm lamp.
7. the open side type according to claim 1 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
It further includes fluxgate signal processing circuit to state device, and the fluxgate signal processing circuit includes frequency-selective amplifier circuit, phase sensitivity
Detector circuit and integration filter circuit.
8. the open side type according to claim 7 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
It includes first resistor R1, second resistance R2,3rd resistor R3, the first operational amplifier U1, the first electricity to state frequency-selective amplifier circuit
Hold C1 and the second capacitance C2, the input terminal of the first resistor R1 are connect with the 5th resistance R5, the first resistor R1's is another
End is connect with the reverse input end of second resistance R2 and the first operational amplifier U1 respectively, and the other end of the second resistance R2 is logical
The second capacitance R2 ground connection is crossed, the other end of the second resistance R2 also passes through the input of 3rd resistor R3 and phase-sensitive detector circuit
End connection, the positive input ground connection of the first operational amplifier U1, the output end and phase of the first operational amplifier U1
The input terminal of quick detector circuit connects, and the first capacitance C1 is parallel between the second resistance R2 and 3rd resistor R3.
9. the open side type according to claim 7 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：Institute
It includes third capacitance C3, the 4th resistance R4 and 3 road alternative analog switches to state phase-sensitive detector circuit, the third capacitance C3's
One end is connect with the output end of frequency-selective amplifier circuit, and the other end of the third capacitance C3 passes through the 4th resistance R4 and 3 tunnels two
The Z input terminals of an analog switch are selected to connect, the Z0 output ends of the 3 road alternative analog switch are with second operational amplifier U2's
Reverse input end connects, the positive input of the Z1 output ends and second operational amplifier U2 of the 3 road alternative analog switch
Connection, the positive input of the Z1 output ends and second operational amplifier U2 of 3 road alternative analog switch while, are grounded.
10. the open side type according to claim 7 based on Bluetooth transmission is used for the device of ferromagnetic detection, it is characterised in that：
The integration filter circuit includes second operational amplifier U2 and the 4th capacitance C4, and the 4th capacitance C4 is parallel to the second fortune
Between the reverse input end and output end of calculating amplifier U2, the output end of the second operational amplifier U2 also with the 5th resistance R5
The other end connection, the output end output digit signals of the second operational amplifier U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820194294.XU CN208092214U (en) | 2018-02-05 | 2018-02-05 | Open side type based on Bluetooth transmission is used for the device of ferromagnetic detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820194294.XU CN208092214U (en) | 2018-02-05 | 2018-02-05 | Open side type based on Bluetooth transmission is used for the device of ferromagnetic detection |
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| Publication Number | Publication Date |
|---|---|
| CN208092214U true CN208092214U (en) | 2018-11-13 |
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|---|---|---|---|
| CN201820194294.XU Active CN208092214U (en) | 2018-02-05 | 2018-02-05 | Open side type based on Bluetooth transmission is used for the device of ferromagnetic detection |
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| Country | Link |
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| CN (1) | CN208092214U (en) |
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