CN202453487U - Wide-range magnetometer - Google Patents
Wide-range magnetometer Download PDFInfo
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- CN202453487U CN202453487U CN2012200193091U CN201220019309U CN202453487U CN 202453487 U CN202453487 U CN 202453487U CN 2012200193091 U CN2012200193091 U CN 2012200193091U CN 201220019309 U CN201220019309 U CN 201220019309U CN 202453487 U CN202453487 U CN 202453487U
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Abstract
The utility model relates to the field of measuring instruments, in particular to a wide-range magnetometer. The wide-range magnetometer is characterized by comprising an oscillation excitation circuit, a filtering, phase-sensitive demodulating and integrating circuit, a feedback circuit and a calibration circuit; and the oscillation excitation circuit is connected with a probe and the filtering, phase-sensitive demodulating and integrating circuit, and the calibration circuit is connected with the oscillation excitation circuit. The wide-range magnetometer provided by the utility model has the advantage of realizing three-component, high resolution (1nT) and high precision (0.2%) measurement in a high magnetic intensity range from -2000muT to +2000muT. The instrument adopts an embedded control system structure and VFD (vacuum fluorescent display) large screen display, is convenient in operation and visual in display, and has functions of automatic zero calibration and automatic measurement range. The instrument is stable and reliable, can conduct long-time automatic measurement and record, provides multiple forms of communication interfaces including Ethernet, USB and RS-232, and has the advantages of small size and light weight.
Description
Technical field
The utility model relates to a kind of measuring appliance field, especially a kind of wide-range magnetometer.
Background technology
In the ship degassing process; Degaussing cable produces the high-intensity magnetic field of intensity up to 1600A/M in naval vessels surrounding space zone; This high-intensity magnetic field will bring influence to the technical feature and the security of the magnetosensitive sense parts of On-Board System, equipment, be accurately to grasp the exact level that should influence with analysis and assessment, and the high-intensity magnetic field in the time of need be to demagnetization is accurately measured; But owing to lack the detection means to this type of high-intensity magnetic field, this work can't be carried out always.
Summary of the invention
The purpose of the utility model is the weak point according to above-mentioned prior art; A kind of wide-range magnetometer is provided; This magnetometer is through improvement and optimize fluxgate sensor structure, parameter; Advanced control, measurement and signal processing technology are adopted in the design of innovation metering circuit, realize the measurement of wide-range high-intensity magnetic field.
The realization of the utility model is accomplished by following technical scheme: a kind of wide-range magnetometer; Comprise magnetic-field measurement module and acquisition control module; Said magnetic-field measurement module comprises probe, magnetic-field measurement circuit, and said probe connects the magnetic-field measurement circuit, and it is characterized in that: described magnetic-field measurement circuit comprises the vibratory stimulation circuit; Filtering, phase demodulation and integrating circuit; Feedback circuit and calibration circuit, said vibratory stimulation circuit connects probe and filtering, phase demodulation and integrating circuit, and said calibration circuit is connected with said vibratory stimulation circuit.
Said vibratory stimulation circuit is made up of counter, crystal resonator, amplifying circuit driving transformer, NPN triode and PNP triode; A pin of said counter inserts crystal resonator; And be connected with the amplifying circuit driving transformer through NPN triode and PNP triode, said amplifying circuit driving transformer connects probe.
Described filtering, phase demodulation and integrating circuit are realized that by bandpass filtering, phase demodulation, integration module a pin in said bandpass filtering, phase demodulation, the integration module connects probe, another pin output magnetic field magnitude of voltage.
Described feedback circuit is made up of two-way precision constant current source circuit and relay commutation circuit; Said two-way precision constant current source circuit is connected with the relay commutation circuit respectively, and said feedback circuit is communicated with the pin of output magnetic field magnitude of voltage in said bandpass filtering, phase demodulation, the integration module.
Described two-way precision constant current source circuit is divided into journey constant-current source circuit and wide range constant-current source circuit in a small amount.
Described calibration circuit is a current pump type ground connection load voltage controlled current source, by precision voltage source Voltage Reference is provided, and produces stable electric current with sample resistance, and is connected with relay, and said relay control inserts the alignment coil of probe.
The utility model has the advantages that: the scope that realized is measured for three-component, high resolving power (1nT) and the high precision (0.2%) of-2000 μ T～+ 2000 μ T high-intensity magnetic fields.Instrument adopts the embedded control system structure, the VFD large screen display, and easy to operate, intuitive display has automatic zero adjustment, automatic range function.Instrument stabilizer, reliable can be measured and record for a long time automatically, Ethernet, USB and RS-232 communication various ways communication interface is provided, and has little, the lightweight advantage of volume.
Description of drawings
Fig. 1 is the utility model instrument composition frame chart;
Fig. 2 is the utility model magnetic-field measurement circuit theory diagrams;
Fig. 3 is the utility model vibratory stimulation circuit diagram;
Fig. 4 is the utility model filtering, phase demodulation and integrating circuit figure;
Fig. 5 is the utility model feedback circuit figure;
Fig. 6 is calibration circuit figure.
Embodiment
Through embodiment the utility model characteristic and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Embodiment: the high-intensity magnetic field survey record appearance based on embedded control system as shown in Figure 1 mainly partly is made up of ARM controller, probe, magnetic-field measurement circuit, VFD display module, data storage circuitry, real time clock circuit, keyboard and USB, serial interface circuit, cpu monitor circuit and power supply etc.
As shown in Figure 2, the magnetic-field measurement circuit is made up of probe, vibratory stimulation circuit, circuitry for signal measurement and four parts of calibration circuit.Circuit adopts closed-loop system, with range for measuring that improves probe and the precision that guarantees measurement.When measuring wide range, adopt the feedback resistance automatic switch-over circuit, adjust feedback factor automatically and adjust gain, be implemented under the situation that does not influence stability and resolution and can reach ± measurement range of 2000 μ T with journey magnetic field in a small amount.
As shown in Figure 3, counter CD4060 inserts the vibration that the 2.5MHz crystal resonator produces 2.5MHz, and produces the probe pumping signal of 5KHz and the phase sensitive detection switching signal of 10KHz through its tally function at 13 pin and 14 pin.The square wave of 5KHz is through by two PNP triode 2N4403 and two complementary push-pull power amplification circuit driving transformer CH1 that NPN triode 2N4401 constitutes, and is extremely saturated through the CH1 incentive probe, probe beginning this moment collecting work.
As shown in Figure 4; Bandpass filtering, phase demodulation, integrating function are realized by the 704 MC-1510 modules that designed; The signal of probe output inserts the 1st pin of MC-1510 module; The phase sensitive detection signal of 10KHz inserts the 5th pin of MC-1510 module, and the signal BFX behind the 2nd pin output integration is used for feedback, and Vo1 is the magnetic field magnitude of voltage of output.
As shown in Figure 5, the feedback commutation circuit is made up of two-way precision constant current source circuit and relay commutation circuit.Amplifier OPA2227 and differential amplifier INA105 and sample resistance R16 form journey constant current source feedback and BUF634 and R17 composition wide range constant current source feedback in a small amount among the figure.Constant current source adopts the design of current pump type ground connection load voltage controlled current source, has the high characteristics of Current Control precision.Feedback adopts constant-current source circuit can guarantee the stability of feedback factor in the total temperature scope, and BUF634 is an electric current power amplifier chip, guarantees when large range measuring, can feed back enough electric currents, thereby produces enough feedback magnetic fields.Commutation circuit is with the ANG20012 small size signal relay design of PANASONIC; Its contact resistance is less than 100m Ω; Isolation resistance is greater than 1G Ω, and switch life is greater than 105 times, and relay is through photoelectric isolated chip PS2502-2 switch; When the isolation of guaranteeing relay circuit and control circuit reduces relay switch to the influence of signal circuit; PS2502-2 needs the drive current of 10mA, and the control signal DIO1 of M2378-CFN20I industry control module can only provide the rated current of 4mA, so PS2502-2 drives through NPN triode 9013.
As shown in Figure 6, calibration circuit is a current pump type ground connection load voltage controlled current source.Provided+the 5V Voltage Reference by precision voltage source REF02, produce stable 2.5mA with 2K sample resistance R22, the alignment coil that inserts probe by the control of AGN20012 relay whether.
In sum; Present embodiment adopts the metering circuit design of innovation; Subsidiary have automatic calibration circuit, and can meet technical requirement that wide-range surveys magnetic and to the protection and the preventive measure of the safety of On-Board System and equipment and performance impact, research correspondence essential technological means is provided for the assessment demagnetization: for the examination and the quality inspection of the newly-built degaussing stations of naval, degaussing ship provides new testing tool; For improvement demagnetization technology, raising demagnetization quality provide new test method, magnetic defense ability, guarantee ship navigating and the equipment that strengthens naval vessels gone entirely, keeps and improve naval's fighting capacity to have crucial meaning.
Claims (6)
1. a wide-range magnetometer comprises magnetic-field measurement module and acquisition control module, and said magnetic-field measurement module comprises probe, magnetic-field measurement circuit; Said probe connects the magnetic-field measurement circuit; It is characterized in that: described magnetic-field measurement circuit comprises the vibratory stimulation circuit, filtering, phase demodulation and integrating circuit, feedback circuit and calibration circuit; Said vibratory stimulation circuit connects probe and filtering, phase demodulation and integrating circuit, and said calibration circuit is connected with said vibratory stimulation circuit.
2. a kind of wide-range magnetometer according to claim 1; It is characterized in that: said vibratory stimulation circuit is made up of counter, crystal resonator, amplifying circuit driving transformer, NPN triode and PNP triode; A pin of said counter inserts crystal resonator; And be connected with the amplifying circuit driving transformer through NPN triode and PNP triode, said amplifying circuit driving transformer connects probe.
3. a kind of wide-range magnetometer according to claim 1; It is characterized in that: described filtering, phase demodulation and integrating circuit are realized by bandpass filtering, phase demodulation, integration module; A pin in said bandpass filtering, phase demodulation, the integration module connects probe, another pin output magnetic field magnitude of voltage.
4. a kind of wide-range magnetometer according to claim 1; It is characterized in that: described feedback circuit is made up of two-way precision constant current source circuit and relay commutation circuit; Said two-way precision constant current source circuit is connected with the relay commutation circuit respectively, and said feedback circuit is communicated with the pin of output magnetic field magnitude of voltage in said bandpass filtering, phase demodulation, the integration module.
5. a kind of wide-range magnetometer according to claim 4 is characterized in that: described two-way precision constant current source circuit is one tunnel a small amount of journey constant-current source circuit and one road wide range constant-current source circuit.
6. a kind of wide-range magnetometer according to claim 1; It is characterized in that: described calibration circuit is a current pump type ground connection load voltage controlled current source; By precision voltage source Voltage Reference is provided; Produce stable electric current with sample resistance, and be connected with relay, said relay control inserts the alignment coil of probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200193091U CN202453487U (en) | 2012-01-17 | 2012-01-17 | Wide-range magnetometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200193091U CN202453487U (en) | 2012-01-17 | 2012-01-17 | Wide-range magnetometer |
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| Publication Number | Publication Date |
|---|---|
| CN202453487U true CN202453487U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200193091U Expired - Fee Related CN202453487U (en) | 2012-01-17 | 2012-01-17 | Wide-range magnetometer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676151A (en) * | 2016-01-18 | 2016-06-15 | 华东师范大学 | Negative feedback type magnetic field sensor |
| CN111398880A (en) * | 2019-11-22 | 2020-07-10 | 中国计量大学上虞高等研究院有限公司 | Negative feedback type reading system for multiferroic magnetic sensor |
| RU2747015C1 (en) * | 2020-03-24 | 2021-04-23 | Акционерное общество "Раменское приборостроительное конструкторское бюро" | Navigation magnetometer (versions) |
-
2012
- 2012-01-17 CN CN2012200193091U patent/CN202453487U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105676151A (en) * | 2016-01-18 | 2016-06-15 | 华东师范大学 | Negative feedback type magnetic field sensor |
| CN105676151B (en) * | 2016-01-18 | 2018-06-22 | 华东师范大学 | A kind of negative feedback magnetic field sensor |
| CN111398880A (en) * | 2019-11-22 | 2020-07-10 | 中国计量大学上虞高等研究院有限公司 | Negative feedback type reading system for multiferroic magnetic sensor |
| RU2747015C1 (en) * | 2020-03-24 | 2021-04-23 | Акционерное общество "Раменское приборостроительное конструкторское бюро" | Navigation magnetometer (versions) |
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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 |
Granted publication date: 20120926 Termination date: 20180117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |