CN102279321A - Portable low-frequency/very-low-frequency electromagnetic wave signal intensity detection device - Google Patents
Portable low-frequency/very-low-frequency electromagnetic wave signal intensity detection device Download PDFInfo
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Abstract
The invention relates to a portable low-frequency/very-low-frequency electromagnetic wave signal intensity detection device which consists of an antenna, a front end signal processing unit, an analog/digital (A/D) sampling unit, a central processing unit, a display unit, a signal indicating unit, an input unit, a communication interface and a power supply unit. The antenna is connected with the front end signal processing unit; the front end signal processing unit is connected with the A/D sampling unit; the output end of the A/D sampling unit is connected with the central processing unit; the central processing unit is connected with the display unit and the signal indicating unit respectively, and is also connected with the communication interface; and the input unit is connected with the central processing unit. The portable low-frequency/very-low-frequency electromagnetic wave signal intensity detection device has the advantages that the design is reasonable, the structure is novel, and the low-frequency/very-low-frequency electromagnetic wave signal range can be effectively detected; the signal intensity of a background electromagnetic field during the current period of time can be intuitively displayed, and the intensity display type can be flexibly set; and the detection device has the capacity of synchronously detecting three paths of signals in real time, has a function of prompting or indicating a variety of signals, and can realize data expansion through the communication interface.
Description
Technical field
The invention belongs to space electromagnetic wave signal detection range, particularly a kind of portable low frequency/very low frequency (VLF) electromagnetic wave signal intensity detecting device, it mainly is the background electromagnetic wave noise intensity that is used to measure the lightening detection device.
Background technology
The lightening detection device is a kind of automotive electronics that is used to survey the thunder and lightning electromagnetic wave signal, for making the lightening detection utensil that the good signal recognition capability be arranged, usually, the lightening detection device has strict requirement to the background electromagnetic wave noise intensity of working environment, therefore, before the lightening detection device uses, need measure in advance the background electromagnetic wave noise of its actual working environment, to judge that whether meeting the lightening detection device places condition.Existing its assay method of background electromagnetic wave noise intensity detecting device that uses is to adopt Analog Electronics Technique, with the reference voltage is reference, the electromagnetic wave signal intensity of sensing is compared, judge by the mode of pilot lamp whether the current background noise exceeds standard, its weak point is: 1, the intensity indication is not directly perceived, needs certain experience to judge noise level; 2, basic parameter is provided with inconvenience; 3, the electromagnetic field detection passage is limited, can't finish electric field signal is detected; 4, the mimic channel running parameter is subject to the influence of environmental baseline; 5, power consumption is higher.
In addition, Chinese patent literature CN 97226742.5 disclosed " hand-held field intensity meter " is mainly used in the measurement of cable TV signal.This hand-held field intensity meter is made up of housing and internal circuit, internal circuit is made up of microprocessor, attenuation network, tuned circuit, mixting circuit, rectification logarithm amplifying circuit, audio output circuit, signal output display circuit, power supply circuit and input keyboard, and wherein mixting circuit, rectification logarithm amplifying circuit are made of the chip of specific model.This hand-held field intensity meter has digital demonstration, continuously-tuning, the under-voltage monitoring of battery, energy-conservation and portable characteristics.
Chinese patent literature CN00262814.7 disclosed " 50Hz power frequency electric field field intensity meter " belongs to the measurement mechanism of 50Hz power-frequency electric field strength.The realization of this measurement mechanism must solve following technical matters, and the one, needs are made a kind of electric-field sensor of suitable measurement 50Hz power frequency electric field, and the 2nd, this measurement mechanism of requirement is easy and simple to handle, and security is good, and the accurate and digital clear display of measurement data.The electronic circuit of this measurement mechanism adopts element design such as Analogous Integrated Electronic Circuits and digital integrated circuit, and uses liquid crystal digital to show the 50Hz power-frequency electric field strength.This measurement mechanism is supported by insulation rod, and the hand-held insulation rod afterbody of operator just can carry out the untouchable measurement that suspends of 50Hz power frequency electric field space field strength distribution.This measurement mechanism is applicable to electric system, transformer station, generating plant and large-scale transmission unit, to the measurement of high-low pressure transmission line of electricity and transmission facility surrounding space 50Hz power-frequency electric field strength.In addition, it also can be used for the measurement of 60Hz power-frequency electric field strength.
It comprises low-frequency time-code receiving circuit and the control circuit that is used for complete machine is controlled, the output terminal connection control circuit of low-frequency time-code receiving circuit Chinese patent literature CN02259029.3 disclosed " lf time-code signal field intensity meter ".It adopts single-frequency to receive, and liquid crystal display can be write down the data and the locator data of long-time measurement automatically, personal error and the reading trouble of having avoided the pointer instrument to bring.This lf time-code signal field intensity meter mainly is that the time-code electric wave signal is detected, and measures narrow bandwidth, and measuring-signal is single.
Chinese patent literature CN 02113101.5 disclosed " movable space electromagnetic environment testing and analytical approach " and Chinese patent literature CN 200410013862.4 disclosed " space electromagnetic environment is portable to be measured and the method for analyzing " a kind ofly is integrated in omnidirectional antenna, electromagnetic field intensity meter (spectrum analysis), geographical space orientator, electromagnetic field intensity meter data-switching plug-in card, space electromagnetic environment basic data storer, Geographic Information System GIS on mobile vehicle such as the vehicle, and the implementation space electromagnetic environment is portable to be measured and analyze.The space electromagnetic environment Measurement and analysis is combined with the geographical space location technology, the master data that dynamic acquisition electromagnetic environment radiation space distributes, and with Geographic Information System GIS processing, show in the electronic chart mode.This technology convenient measurement, analysis, processing and management to space electromagnetic environment, and the use of electromagnetic environment data is as inquiry, demonstration.
Chinese patent literature CN 200910019496.6 disclosed " a kind of electromagnetic wave automatic monitoring and analytic system based on GIS " comprises radio field intensity instrument digital sampling and processing, manual load module, gps data acquisition processing module, real-time curve module, database module, electronic chart display module, data display module, isoline module and covering analyzing module.This invention has realized the real-time reception and the covering analyzing of electromagnetic signal, can finish the real-time acquisition process of field intensity data and space orientation data, draws the time dependent real-time curve of field intensity, the drafting of demonstration of monitor vehicle driving trace and field intensity coverage diagram.Field intensity monitoring equipment and geography information and database is integrated on monitor vehicle, finish gathering in real time automatically and analytical work of information, shorten the degree of accuracy of data acquisition time and drawing greatly, and be convenient to the comparison and the inquiry work of historical data.
According to the knowledge of the applicant, the electromagnetic wave signal strength investigation device that above-mentioned prior art relates to is that the electromagnetic wave signal with a certain special frequency channel (being limited to 50Hz power frequency and 50Hz with upper frequency) is a detected object, the look-in frequency width is narrower, can't satisfy the effective covering to low frequency/very low frequency (VLF) electromagnetic wave signal scope.And the charged magnetic wave detection system of broadband or full range, system equipment is numerous, the measuring system complex structure, move in vehicle-mounted mode, be not easy to the measurement of the electromagnetic wave signal intensity of part or specific region, particularly more inconvenient near the detection of the ground unrest lightning location system site, for example buildings roof, iron tower etc.On the other hand, existing apparatus mainly is a single channel passage detection of electromagnetic fields intensity, and the detection of electric field, magnetic-field component intensity can't be provided simultaneously, obtains multiple information as need and need acquire more equipment.The applicant finds under study for action, existing electromagnetic wave signal strength investigation device is limit owing to its performance, structural design is unreasonable, environment for use is restricted, be difficult to satisfy the needs of lightening detection station addressing, and to accurately understand the electromagnetic field background noise levels of preliminary election site, lightening detection station, and comprising electric field component and magnetic-field component information, need improve existing apparatus.
Summary of the invention
The objective of the invention is, deficiency at said apparatus, improve, a kind of portable low frequency/very low frequency (VLF) electromagnetic wave signal intensity detecting device is proposed, its be a kind of digital, possess multiplexed signal sampling, show the low frequency/very low frequency (VLF) electromagnetic wave signal intensity detecting device of functions such as output and parameter are provided with.
Technical solution of the present invention is: adopt antenna, the front end signal processing unit, the A/D sampling unit, CPU (central processing unit), display unit, the signal indicating member, input block, communication interface and power supply unit, it is characterized in that, the output terminal of antenna links to each other with the input end of front end signal processing unit, the output terminal of front end signal processing unit links to each other with the input end of A/D sampling unit, the output terminal of A/D sampling unit links to each other with the signal input part of CPU (central processing unit), the output terminal of CPU (central processing unit) respectively with display unit, the signal indicating member is connected, CPU (central processing unit) links to each other with communication interface, and the delivery outlet of input block links to each other with the input port of CPU (central processing unit).
It is characterized in that antenna comprises electric field antenna and magnetic field antenna.
It is characterized in that the electric field antenna adopts capacity plate antenna formula electric field antenna.
It is characterized in that magnetic field antenna adopts the orthogonal type frame antenna.
It is characterized in that the signal indicating member comprises signal lamp unit and hummer unit.
It is characterized in that the front end signal processing unit comprises three road input ends and three road output terminals.
It is characterized in that communication interface can connect peripheral expansion equipment.
It is characterized in that peripheral expansion equipment adopts the GPS unit.
It is characterized in that CPU (central processing unit) has connected storage unit.
Advantage of the present invention is: reasonable in design, novel structure can be realized the effective covering to low frequency/very low frequency (VLF) electromagnetic wave signal scope, can intuitively show background electromagnetic field signal intensity in the current slot, and the intensity display type can be set as required flexibly; Possesses the real-time synchronization detection capability of three road signals; Basic parameter can be provided with flexibly, has multiple signal prompt or deixis; Owing to adopted the digital signal implementation, make environmental stability height of the present invention, and can realize the data expansion by communication interface, low in energy consumption.
Description of drawings
Fig. 1, basic structure synoptic diagram of the present invention
Fig. 2, preferred construction synoptic diagram of the present invention
Embodiment
As shown in Figure 1, the present invention is made up of antenna, front end signal processing unit 3, A/D sampling unit 4, CPU (central processing unit) 5, display unit 6, signal indicating member, input block 9, communication interface 10 and power supply unit 11.Wherein, antenna includes electric field antenna 1 and magnetic field antenna 2.Electric field antenna 1 and magnetic field antenna 2 connect with front end signal processing unit 3 respectively.Electric field antenna 1 adopts capacity plate antenna formula electric field antenna, the electric field signal that the electric field change that external electromagnetic field produces can change between two pole plates of electric field antenna 1, the output terminal of electric field antenna 1 exports this signal to the electric field signal input end of front end signal processing unit 3.Magnetic field antenna 2 adopts the orthogonal type frame antenna, the changes of magnetic field that external electromagnetic field produces can produce the induction electromotive force of two-way quadrature in the frame molded lines circle of two quadratures, the output terminal of magnetic field antenna 2 exports above-mentioned two paths of signals to the two-way field signal input end of front end signal processing unit 3 respectively.
The output terminal of front end signal processing unit 3 links to each other with the input end of A/D sampling unit 4.Front end signal processing unit 3 is a kind of analog signal processing components that three road signal parallels can be handled, and it mainly acts on is that three road signals that come amplify, Filtering Processing to importing, and with signal condition to the dynamic range that sets.Effective working frequency range of front end signal processing unit 3 is in low frequency/very low frequency (VLF) section, can effectively improve the signal to noise ratio (S/N ratio) of echo signal.To export the input end of A/D sampling unit 4 by the output terminal of front end signal processing unit 3 to through three tunnel simulating signals after 3 processing of front end signal processing unit.
The output terminal of A/D sampling unit 4 links to each other with the signal input part of CPU (central processing unit) 5, A/D sampling unit 4 is AD conversion unit, and its effect is to be the digital signal that can be used for digital signal processing with the analog-signal transitions that front end signal processing unit 3 sends.Consider the real-time and the synchronism of signal Processing, what the present invention adopted is the parallel processing mode.To export the signal input part of CPU (central processing unit) 5 by the output terminal of A/D sampling unit 4 to through three way word signals after 4 processing of A/D sampling unit.
The output terminal of CPU (central processing unit) 5 is connected with display unit 6, signal indicating member respectively.CPU (central processing unit) 5 is the core components among the present invention, and its effect is that three way word signals of input are handled, analyzed and compare by algorithm, and according to using needs to export on the display unit 6.Simultaneously, can instructional information be sent by the signal indicating member according to setting.Signal indicating member of the present invention comprises signal lamp unit 7 and hummer unit 8, by signal lamp unit 7 and hummer unit 8 instructional information is sent, and also can use signal lamp unit 7 or hummer unit 8 separately.By display unit 6, the user can conveniently read parameters such as current demand signal intensity, average signal strength, unit interval noise number of times.The user also can judge by the prompting of indicator unit 7 or hummer unit 8 by pre-set parameter.For the experience user, judge the determination efficiency that can improve the fixed in place parameter by the prompting of signal lamp unit 7 or hummer unit 8.
CPU (central processing unit) 5 links to each other with communication interface 10, and the delivery outlet of input block 9 links to each other with the input port of CPU (central processing unit) 5.
As shown in Figure 2, the preferred version that another embodiment that the present invention proposes adopts is to be made up of antenna, front end signal processing unit 3, A/D sampling unit 4, CPU (central processing unit) 5, display unit 6, signal indicating member, input block 9, communication interface 10, GPS unit 12, storage unit 13 and power supply unit 11.Wherein, antenna includes electric field antenna 1 and magnetic field antenna 2.Electric field antenna 1 and magnetic field antenna 2 connect with front end signal processing unit 3 respectively.Electric field antenna 1 adopts capacity plate antenna formula electric field antenna.Magnetic field antenna 2 adopts the orthogonal type frame antenna.The output terminal of front end signal processing unit 3 links to each other with the input end of A/D sampling unit.The output terminal of A/D sampling unit 4 links to each other with the signal input part of CPU (central processing unit) 5, and the output terminal of CPU (central processing unit) 5 is connected with display unit 6, signal indicating member, storage unit 13 respectively.The signal indicating member comprises signal lamp unit 7 and hummer unit 8.Connect between the input/output terminal of the external interface of communication interface 10 and GPS unit 12, by GPS unit 12, CPU (central processing unit) 5 can be obtained gps coordinate data and time service accurately.Storage unit 13 is parts that this preferred version adopts, and storage unit 13 links to each other with CPU (central processing unit) 5, thereby realizes the local record storage of mass data.In conjunction with GPS unit 12, low frequency/very low frequency (VLF) electromagnetic wave signal intensity detecting device can conveniently write down the coordinate information and the background signal strength information of corresponding time period of a large amount of detections, makes things convenient for the analytic statistics of slip-stick artist's late time data.
Among two embodiment of the present invention, power supply unit 11 is the underlying hardware unit, of the present inventionly has the parts of need for electricity that the power supply support is provided for constituting.Consider portability of the present invention, power supply unit 11 should adopt dc-battery.
Claims (9)
1. portable low frequency/very low frequency (VLF) electromagnetic wave signal intensity detecting device, adopt antenna, the front end signal processing unit, the A/D sampling unit, CPU (central processing unit), display unit, the signal indicating member, input block, communication interface and power supply unit, it is characterized in that, the output terminal of antenna links to each other with the input end of front end signal processing unit (3), the output terminal of front end signal processing unit (3) links to each other with the input end of A/D sampling unit (4), the output terminal of A/D sampling unit (4) links to each other with the signal input part of CPU (central processing unit) (5), the output terminal of CPU (central processing unit) (5) respectively with display unit (6), the signal indicating member is connected, CPU (central processing unit) (5) links to each other with communication interface (10), and the delivery outlet of input block (9) links to each other with the input port of CPU (central processing unit) (5).
2. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that, antenna comprises electric field antenna (1) and magnetic field antenna (2).
3. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that, electric field antenna (1) adopts capacity plate antenna formula electric field antenna.
4. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that, magnetic field antenna (2) adopts the orthogonal type frame antenna.
5. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that, the signal indicating member comprises signal lamp unit (7) and hummer unit (8).
6. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that front end signal processing unit (3) comprises three road input ends and three road output terminals.
7. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that communication interface (10) can connect peripheral expansion equipment.
8. a kind of portable low frequency according to claim 7/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterized in that, peripheral expansion equipment adopts GPS unit (12).
9. a kind of portable low frequency according to claim 1/very low frequency (VLF) electromagnetic wave signal intensity detecting device is characterised in that CPU (central processing unit) (5) has connected storage unit (13).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103048552A (en) * | 2012-12-20 | 2013-04-17 | 孙海元 | Lightning early warning device and implementation method for lightning early warning |
| CN103323683A (en) * | 2013-06-09 | 2013-09-25 | 中国科学院深圳先进技术研究院 | Portable electromagnetic wave strength detecting device and method |
| CN104849571A (en) * | 2015-05-08 | 2015-08-19 | 浙江大学 | Smart phone audio port-based portable electromagnetic wave intensity detection device |
| CN105008939A (en) * | 2013-03-10 | 2015-10-28 | 高通股份有限公司 | Detecting electromagnetic energy for alarm or log using mobile phone devices |
| CN105842545A (en) * | 2016-05-12 | 2016-08-10 | 北京森馥科技股份有限公司 | Three dimensional omnidirectional electromagnetic field probe and electromagnetic detection device |
| CN106018977A (en) * | 2016-05-25 | 2016-10-12 | 四川润泽经伟信息技术有限公司 | Wireless electromagnetic signal acquisition and storage system and storage method |
| CN107741541A (en) * | 2017-10-12 | 2018-02-27 | 中车株洲电力机车有限公司 | A kind of rail traffic vehicles built-in field intensity near-field test method and system |
| CN116879814A (en) * | 2023-06-20 | 2023-10-13 | 北京自动化控制设备研究所 | Very low frequency signal detection method and system based on atomic magnetometer |
| CN116879814B (en) * | 2023-06-20 | 2024-07-09 | 北京自动化控制设备研究所 | Very low frequency signal detection method and system based on atomic magnetometer |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103048552A (en) * | 2012-12-20 | 2013-04-17 | 孙海元 | Lightning early warning device and implementation method for lightning early warning |
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| CN105008939A (en) * | 2013-03-10 | 2015-10-28 | 高通股份有限公司 | Detecting electromagnetic energy for alarm or log using mobile phone devices |
| CN103323683A (en) * | 2013-06-09 | 2013-09-25 | 中国科学院深圳先进技术研究院 | Portable electromagnetic wave strength detecting device and method |
| CN103323683B (en) * | 2013-06-09 | 2015-10-28 | 中国科学院深圳先进技术研究院 | A kind of portable electromagnetic wave intensity detecting device and method |
| CN104849571A (en) * | 2015-05-08 | 2015-08-19 | 浙江大学 | Smart phone audio port-based portable electromagnetic wave intensity detection device |
| CN105842545A (en) * | 2016-05-12 | 2016-08-10 | 北京森馥科技股份有限公司 | Three dimensional omnidirectional electromagnetic field probe and electromagnetic detection device |
| CN106018977A (en) * | 2016-05-25 | 2016-10-12 | 四川润泽经伟信息技术有限公司 | Wireless electromagnetic signal acquisition and storage system and storage method |
| CN107741541A (en) * | 2017-10-12 | 2018-02-27 | 中车株洲电力机车有限公司 | A kind of rail traffic vehicles built-in field intensity near-field test method and system |
| CN116879814A (en) * | 2023-06-20 | 2023-10-13 | 北京自动化控制设备研究所 | Very low frequency signal detection method and system based on atomic magnetometer |
| CN116879814B (en) * | 2023-06-20 | 2024-07-09 | 北京自动化控制设备研究所 | Very low frequency signal detection method and system based on atomic magnetometer |
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