CN201819983U - PCB (printed circuit board) of digital flux-gate magnetometer - Google Patents
PCB (printed circuit board) of digital flux-gate magnetometer Download PDFInfo
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- CN201819983U CN201819983U CN2010205808619U CN201020580861U CN201819983U CN 201819983 U CN201819983 U CN 201819983U CN 2010205808619 U CN2010205808619 U CN 2010205808619U CN 201020580861 U CN201020580861 U CN 201020580861U CN 201819983 U CN201819983 U CN 201819983U
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Abstract
The utility model provides a PCB of a digital flux-gate magnetometer, which comprises a PCB substrate and a printed circuit, wherein the printed circuit comprises an A/D converter, a digital processing unit, a D/A conversion chip and an ARM controller; a flux gate signal is sampled with high speed by the A/D converter and inputted to the digital processing unit; the digital processing unit performs the filtration, the phase-sensitive rectification, the digital integration and calibration and the compensation to generate a DC digital signal; and the DC digital signal is inputted to the D/A conversion chip and the ARM controller; the D/A conversion chip inputs the DC digital signal to a flux gate feedback coil; and the ARM controller performs the man-machine interactive processing through an operating keyboard and displays the result on a display device. The utility model adopts the digital processing unit instead of the conventional analog circuit to perform the secondary harmonic signal processing, and reduces the environmental influence on the measurement equipment. The feedback system allows the flux gate probe to work in the condition free of the magnetic field, eliminates the induction or stray effect among the analog elements, and ensures good equipment stability and high measurement accuracy.
Description
Technical field
The utility model relates to pcb board, relates to a kind of digital flux-gate magnetometer pcb board specifically.
Background technology
The desirable output signal of fluxgate is the AC signal that only contains even-order harmonic, usually need it be transformed into by the linear d. c. voltage signal of measuring magnetic field; Method commonly used is information extraction from second harmonic.Because the influence of some factors, it is even-order harmonic that the signal of actual output has more than, and also contains odd harmonic simultaneously; And the main effect of selective frequency amplifier circuit is the odd harmonic that suppresses excitation frequency when useful signal is amplified.After phase depending on rectification, the DC component of signal is with linear by measuring magnetic field.
Traditional flux-gate magnetometer mainly adopts Analog Circuit Design.Yet analog element is affected by environment easily, and is relatively more responsive to temperature variation, aging easily, and also occur induction, spurious effects between a large amount of analog elements easily, even make circuit concussion etc. occur, make the stability of equipment and accuracy of measurement all be subjected to very big influence.
Summary of the invention
At above-mentioned situation, the utility model provides a kind of digital flux-gate magnetometer pcb board, with solve traditional flux-gate magnetometer easily affected by environment, be subject to influence of temperature change, easily aging, and be prone to the problem that induction, spurious effects cause stabilization of equipment performance and accuracy of measurement difference between analog element.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of digital flux-gate magnetometer pcb board comprises the one group of P.e.c. that is provided with on PCB substrate and the real estate, it is characterized in that, described one group of P.e.c. comprises A/D converter, digital processing unit, D/A conversion chip, ARM controller and circuitry lines; Described inlet circuit line connects the A/D converter input end; Described A/D converter output terminal is by circuitry lines linking number word processor input end; Described digital processing unit has two output terminals, and one of them output terminal connects an input end of ARM controller by circuitry lines; The input end of described ARM controller is two, and another input end of ARM controller connects a circuitry lines, and the output terminal of described ARM connects the circuit of output terminal line; Another output terminal of described digital processing unit is by the input end of circuitry lines connection D/A conversion chip, and the output terminal of described D/A conversion chip connects an output circuit line.
Further, described digital processing unit comprises wave filter, phase-sensitive rectifier, digital integration element, compensation for calibrating errors device; Described filter input end connects the A/D converter output terminal by circuitry lines; Filter output connects the phase-sensitive rectifier input end by circuitry lines; The phase-sensitive rectifier output terminal connects digital integral element input end by circuitry lines; Digital integration element output terminal connects compensation for calibrating errors device input end by circuitry lines; The output terminal of described compensation for calibrating errors device is two, a input end by circuitry lines connection ARM controller, and another connects the input end of D/A conversion chip by circuitry lines.
The beneficial effects of the utility model are, digital processing unit has replaced conventional analog circuits to carry out the signal Processing of second harmonic, reduced the influence of environment to measuring equipment, the D/A output signal is operated under zero magnetic field condition fluxgate magnetic core by backfeed loop, induction, spurious effects between analog element have been eliminated, stabilization of equipment performance is good, the accuracy of measurement height.
Description of drawings
Fig. 1 is the structural representation of a kind of digital flux-gate magnetometer pcb board of the utility model.
Fig. 2 is the system chart of a kind of digital flux-gate magnetometer pcb board of the utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to a kind of digital flux-gate magnetometer pcb board of Fig. 1, comprise the one group of P.e.c. 200 that is provided with on PCB substrate 100 and the real estate.
Described pcb board, i.e. printed-wiring board (PWB), English name printed circuit board is called for short PCB, is insulcrete.
Referring to Fig. 2, described one group of P.e.c. comprises A/D converter, digital processing unit DSP, D/A conversion chip, ARM controller and circuitry lines.
Described inlet circuit line connects the A/D converter input end; Described A/D converter output terminal is by circuitry lines linking number word processor input end; Described digital processing unit has two output terminals, and one of them output terminal connects an input end of ARM controller by circuitry lines; The input end of described ARM controller is two, and another input end of ARM controller connects a circuitry lines, and the output terminal of described ARM connects the circuit of output terminal line; Another output terminal of described digital processing unit is by the input end of circuitry lines connection D/A conversion chip, and the output terminal of described D/A conversion chip connects an output circuit line.
Described digital processing unit comprises wave filter, phase-sensitive rectifier, digital integration element, compensation for calibrating errors device; Described filter input end connects the A/D converter output terminal by circuitry lines; Filter output connects the phase-sensitive rectifier input end by circuitry lines; The phase-sensitive rectifier output terminal connects digital integral element input end by circuitry lines; Digital integration element output terminal connects compensation for calibrating errors device input end by circuitry lines; The output terminal of described compensation for calibrating errors device is two, a input end by circuitry lines connection ARM controller, and another connects the input end of D/A conversion chip by circuitry lines.
Described A/D converter input end connects the output terminal of the inductive coil of fluxgate magnetic core induced field size by the inlet circuit line, the inductive coil of fluxgate magnetic core induced field size connects exciting current, under the exciting current effect, the inductive coil of fluxgate magnetic core induces the fluxgate signal of reaction environment magnetic field size, sends digital processing unit DSP after the A/D converter high-speed sampling to.Digital processing unit DSP obtains reacting the DC digital signal of external magnetic field after the digital signal of input is passed through links such as filtering, phase depending on rectification, digital integration, calibration, compensation successively, and outputs to the D/A conversion chip.The D/A output signal forms closed-loop system by the tickler (inductive coil) that backfeed loop is input to fluxgate magnetic core.Owing to adopted closed-loop control, and digital processing unit DSP is provided with integral element, according to this closed-loop system of Theory of Automatic Control is indifference system, thereby fluxgate magnetic core is actually and is operated under zero magnetic field condition, that is to say that magnetic field that feedback current produces and environmental magnetic field equal and opposite in direction, direction are opposite.Integrating circuit is a high-gain link, and the ideal integrator gain is zero, also is that the forward path gain is very big, and at this moment the gradient of system signal depends primarily on feedback factor.And feedback factor determines that by feedback resistance more stable, Signal gradient has the good linearity.Thereby under the sufficiently high condition of D/A precision, the digital signal of D/A front end has been reacted environmental magnetic field exactly.The DSP integration obtains signal and passes to the ARM controller through compensation for calibrating errors.The output terminal of described ARM controller connects display, and another input end connects keyboard; Show and the man-machine interaction processing.
Hardware aspect, A/D converter becomes simulating signal into the accessible digital quantity of digital processing unit DSP, is the basis that DSP carries out data processing; The utility model can adopt conversion chip AD7710, resolution 24 Bit.Each probe is furnished with an A/D converter, and data conversion process is controlled by DSP, and conversion gained data directly enter pending and transmission such as DSP.
DSP can adopt the TMS320VC5509A of Ti company, and dominant frequency is 144 MHz, can realize high speed, large capacity digital signal Processing.The data of fluxgate magnetic core collection convert digital signal to through A/D, in DSP, carry out Filtering Processing then, extract the second harmonic in the probe iron core, and calculate the amplitude and the phase place of second harmonic, obtain by the size and Orientation of measuring magnetic field through converting, result's output is passed to ARM carry out subsequent treatment.
The D/A conversion chip is converted to simulating signal with digital signal, and the utility model can adopt conversion chip DAC7664EB, and resolution is 16, and linear error is 1LSB, and be 10 μ s switching time.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a digital flux-gate magnetometer pcb board comprises the one group of P.e.c. that is provided with on PCB substrate and the real estate, it is characterized in that, described one group of P.e.c. comprises A/D converter, digital processing unit, D/A conversion chip, ARM controller and circuitry lines; Described inlet circuit line connects the A/D converter input end; Described A/D converter output terminal is by circuitry lines linking number word processor input end; Described digital processing unit has two output terminals, and one of them output terminal connects an input end of ARM controller by circuitry lines; The input end of described ARM controller is two, and another input end of ARM controller connects a circuitry lines, and the output terminal of described ARM connects the circuit of output terminal line; Another output terminal of described digital processing unit is by the input end of circuitry lines connection D/A conversion chip, and the output terminal of described D/A conversion chip connects an output circuit line.
2. a kind of digital flux-gate magnetometer pcb board according to claim 1 is characterized in that described digital processing unit comprises wave filter, phase-sensitive rectifier, digital integration element, compensation for calibrating errors device; Described filter input end connects the A/D converter output terminal by circuitry lines; Filter output connects the phase-sensitive rectifier input end by circuitry lines; The phase-sensitive rectifier output terminal connects digital integral element input end by circuitry lines; Digital integration element output terminal connects compensation for calibrating errors device input end by circuitry lines; The output terminal of described compensation for calibrating errors device is two, a input end by circuitry lines connection ARM controller, and another connects the input end of D/A conversion chip by circuitry lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205808619U CN201819983U (en) | 2010-10-28 | 2010-10-28 | PCB (printed circuit board) of digital flux-gate magnetometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205808619U CN201819983U (en) | 2010-10-28 | 2010-10-28 | PCB (printed circuit board) of digital flux-gate magnetometer |
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| Publication Number | Publication Date |
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| CN201819983U true CN201819983U (en) | 2011-05-04 |
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| CN2010205808619U Expired - Fee Related CN201819983U (en) | 2010-10-28 | 2010-10-28 | PCB (printed circuit board) of digital flux-gate magnetometer |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520375A (en) * | 2011-12-14 | 2012-06-27 | 吉林大学 | Fluxgate magnetometer detection circuit and method for improving accuracy thereof |
| CN102565723A (en) * | 2012-01-17 | 2012-07-11 | 中国人民解放军91872部队上海研究室 | Flux-gate type wide-range magnetometer |
| CN102830371A (en) * | 2012-05-24 | 2012-12-19 | 中国石油天然气集团公司 | Signal processing circuit of fluxgate sensor |
| CN102866366A (en) * | 2012-09-25 | 2013-01-09 | 北京机械设备研究所 | Magnetic field measurement device based on giant magneto-impedance effect |
| CN103438876A (en) * | 2013-09-05 | 2013-12-11 | 新乡学院 | Magnetic heading system based on digital magnetic flux gate |
| CN103743400A (en) * | 2013-09-05 | 2014-04-23 | 新乡学院 | Magnetic heading resolver |
| CN104321662A (en) * | 2012-05-15 | 2015-01-28 | 株式会社藤仓 | Magnetic element control device, magnetic element control method, and magnetic detection device |
| CN105044629A (en) * | 2015-05-18 | 2015-11-11 | 西北工业大学 | Fluxgate sensor feedback circuit |
| CN106324542A (en) * | 2016-08-30 | 2017-01-11 | 中国人民解放军海军工程大学 | Triaxial decoupling self-zero-setting fluxgate magnetometer zero point measurement circuit |
| CN106405452A (en) * | 2015-11-20 | 2017-02-15 | 北京纳特斯拉科技有限公司 | Chip-level packaging micro-triaxial fluxgate magnetometer |
| CN107643498A (en) * | 2016-07-21 | 2018-01-30 | 武汉市中邦博尔高新科技有限公司 | A kind of magnetic measurement system and survey magnetism method based on fluxgate sensor |
-
2010
- 2010-10-28 CN CN2010205808619U patent/CN201819983U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520375B (en) * | 2011-12-14 | 2015-06-03 | 吉林大学 | Fluxgate magnetometer detection circuit and method for improving accuracy thereof |
| CN102520375A (en) * | 2011-12-14 | 2012-06-27 | 吉林大学 | Fluxgate magnetometer detection circuit and method for improving accuracy thereof |
| CN102565723A (en) * | 2012-01-17 | 2012-07-11 | 中国人民解放军91872部队上海研究室 | Flux-gate type wide-range magnetometer |
| US9157969B2 (en) | 2012-05-15 | 2015-10-13 | Fujikura Ltd. | Magnetic element control device, magnetic device control method, and magnetic detecting device |
| CN104321662A (en) * | 2012-05-15 | 2015-01-28 | 株式会社藤仓 | Magnetic element control device, magnetic element control method, and magnetic detection device |
| CN102830371A (en) * | 2012-05-24 | 2012-12-19 | 中国石油天然气集团公司 | Signal processing circuit of fluxgate sensor |
| CN102866366A (en) * | 2012-09-25 | 2013-01-09 | 北京机械设备研究所 | Magnetic field measurement device based on giant magneto-impedance effect |
| CN103438876A (en) * | 2013-09-05 | 2013-12-11 | 新乡学院 | Magnetic heading system based on digital magnetic flux gate |
| CN103743400A (en) * | 2013-09-05 | 2014-04-23 | 新乡学院 | Magnetic heading resolver |
| CN103438876B (en) * | 2013-09-05 | 2016-08-17 | 新乡学院 | A kind of Magnetic Heading System based on numeral fluxgate |
| CN103743400B (en) * | 2013-09-05 | 2017-04-05 | 新乡学院 | A kind of magnetic heading resolver |
| CN105044629A (en) * | 2015-05-18 | 2015-11-11 | 西北工业大学 | Fluxgate sensor feedback circuit |
| CN105044629B (en) * | 2015-05-18 | 2018-06-19 | 西北工业大学 | A kind of fluxgate sensor feedback circuit |
| CN106405452A (en) * | 2015-11-20 | 2017-02-15 | 北京纳特斯拉科技有限公司 | Chip-level packaging micro-triaxial fluxgate magnetometer |
| CN107643498A (en) * | 2016-07-21 | 2018-01-30 | 武汉市中邦博尔高新科技有限公司 | A kind of magnetic measurement system and survey magnetism method based on fluxgate sensor |
| CN106324542A (en) * | 2016-08-30 | 2017-01-11 | 中国人民解放军海军工程大学 | Triaxial decoupling self-zero-setting fluxgate magnetometer zero point measurement circuit |
| CN106324542B (en) * | 2016-08-30 | 2018-11-09 | 中国人民解放军海军工程大学 | A kind of three axis decoupling self-regulated Zero flux flux gate magnetometer zero measuring 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: 20110504 Termination date: 20111028 |