CN101975878B - Bistable radiation comb signal source - Google Patents
Bistable radiation comb signal source Download PDFInfo
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- CN101975878B CN101975878B CN2010105064868A CN201010506486A CN101975878B CN 101975878 B CN101975878 B CN 101975878B CN 2010105064868 A CN2010105064868 A CN 2010105064868A CN 201010506486 A CN201010506486 A CN 201010506486A CN 101975878 B CN101975878 B CN 101975878B
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Abstract
The invention discloses a bistable radiation comb signal source, which comprises a shielding shell, a radiation antenna externally connected to the shielding shell, a charge protection module, a rechargeable battery and a circuit board, wherein the charge protection module, the rechargeable battery and the circuit board are arranged in the shielding shell; the circuit board comprises a voltage detection regulating circuit, a linear reducing regulating circuit, two crystal oscillation circuits, a frequency division selection circuit, a frequency division shaping circuit and a step shaping circuit; and a charge power supply charges the rechargeable battery by the charge protection module, the rechargeable battery supplies power to the circuit board to form comb spectral lines by the circuit board, and the comb spectral lines are output by the radiation antenna. The generated bistable radiation comb signal source has a simple structure and stable performance, is convenient to operate, and as a stable standard signal, is applied to the regular check of test equipment and environments thereof to check whether the accuracy of the equipment meets the requirement or not.
Description
Technical field
The present invention relates to test in a kind of radio field the multiple spectra standard signal source that electromagnetic compatibility (EMC) radiation project is used; Refer in particular to a kind of bistable radiation pectination signal source; This pectination signal source device is as stable standard signal; Be used for the daily verification of testing apparatus and environment thereof, verify instrument accuracy grade and whether meet the requirements.
Background technology
Technical regulation has all unified to stipulate electromagnetic compatibility (EMC) the radiation term purpose method of detecting electric product both at home and abroad.Test site carries out in oval open area test site of CISPR or the anechoic chamber, in equivalence, and is as shown in Figure 1.Test macro is made up of the oval open area test site of the CISPR of standard, antenna, measuring receiver etc.; Test product EUT and antenna ANTENNA are respectively on two focuses of ellipse; The undesired signal that EUT sends is propagated at checkout area, after antenna receives, sends electromagnetic interference measurement, EMI measurement receiver RECEIVER to by cable.
When the test macro verification, radiation pectination signal source replaces test product, is placed on one of them focus, and the pectination signal source is by self powered battery, and radiation pectination undesired signal through antenna receiving signal, is used for test and check test system.
At present, also do not have unified standard to be used for testing whether accurately method of whole system both at home and abroad, just respectively measuring receiver, open area test site or anechoic chamber, etc. are carried out independent verification, test each equipment and facility separately and whether meet precision requirement.Domesticly do not design yet, invent and sell such pectination signal source, do not have such patent of invention.
Summary of the invention
The bistable radiation pectination signal source that the purpose of this invention is to provide a kind of simple in structure, easy to operate, stable performance.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of bistable radiation pectination signal source; Comprise screening can, be connected on the radiating antenna on the screening can and be built in charge protection module in the screening can, rechargeable battery and circuit board and form outward; Circuit board comprises that voltage detecting mu balanced circuit, linear voltage decreasing mu balanced circuit, two crystal oscillating circuits, frequency divisions select circuit, frequency division shaping circuit, step shaping circuit, and charge power supply is charged to rechargeable battery through the additives for overcharge protection module, states the circuit board power supply backward by rechargeable battery; Through voltage detecting mu balanced circuit and the stable working power of linear voltage decreasing mu balanced circuit output; Produce two frequencies and the pulse of spoke degree stable clock respectively through two crystal oscillating circuits again, select to carry out the frequency division shaping again behind the circuit through frequency division, through the step shaping circuit; Produce time domain pulse width, front and back along the pulse steep, that amplitude is high; Through Fourier transform, on frequency domain, form the abundant pectination spectral line of high frequency composition, export by radiating antenna at last.
Power switch, power light, frequency change-over switch, low-voltage pilot lamp and DC DC charging socket are installed on the said screening can; One end of frequency change-over switch is connected with the linear voltage decreasing mu balanced circuit and the other end select to switch and to be connected with one of them crystal oscillating circuit; The low-voltage pilot lamp is connected with low-voltage detection circuit also whether display voltage is not enough, and the input end that DC DC charging socket is located at the charge protection module is connected with charge power supply.After power switch was connected, if power light PWR is bright, low-voltage pilot lamp LOW BAT did not work, and explains that cell voltage is normal, the circuit board operate as normal; If power light PWR does not work, low-voltage pilot lamp LOW BAT is bright, explains that cell voltage is not enough, and circuit board is not worked, and needs charging.
The top of said screening can is provided with BNC socket, and radiating antenna is installed on the screening can through BNC socket.
The length of said radiating antenna is 3 inches or 12 inches.
After adopting such scheme, the present invention is simple in structure, easy to operate, because technology is pressed in the utilization bistable; So, stable performance, the bistable high frequency radiation pectination signal source that is produced is mainly used in the accuracy of verification electromagnetic interference test system; Perhaps being used for inside, laboratory carries out Intermediate Checks to equipment of itself (equipment sent for twice in the time cycle of external calibration; Accuracy is verified and verified in the centre to equipment, is called Intermediate Checks), this pectination signal source plays standard substance.
Description of drawings
Fig. 1 is existing test macro synoptic diagram;
Fig. 2 is a schematic appearance of the present invention;
Fig. 3 is a theory diagram of the present invention;
Fig. 4 is a circuit diagram of the present invention;
Fig. 5 is a 20MHz radiation pectination signal spectrum at interval;
Fig. 6 is the structural drawing that frequency division is selected circuit, frequency division shaping circuit and step shaping circuit.
Embodiment
To shown in Figure 4, a kind of bistable radiation pectination signal source that the present invention discloses comprises screening can 1, is connected on the radiating antenna 2 on the screening can 1 outward and the charge protection module 3, rechargeable battery 4 and the circuit board 5 that are built in the screening can 1 are formed like Fig. 2.
The top of screening can 1 is provided with BNC socket 10, and radiating antenna 2 is installed on the screening can 1 through BNC socket 10.The length of radiating antenna 2 is 3 inches or 12 inches.
Charge power supply is charged to rechargeable battery 4 through additives for overcharge protection module 3; State circuit board 5 power supplies backward by rechargeable battery 4; Press the stable working power of technology back output through voltage detecting mu balanced circuit 51 and 52 bistables of linear voltage decreasing mu balanced circuit; Produce two frequencies and spoke degree stable clock pulse (radiation high frequency pectination undesired signal) respectively through two crystal oscillating circuits 53 and 54 again, select to carry out the frequency division shaping through frequency division shaping circuit 56 again behind the circuit 55 through frequency division, through step shaping circuit 57; Produce time domain pulse width, front and back along the pulse steep, that amplitude is high; Through Fourier transform, on frequency domain, form the abundant pectination spectral line of high frequency composition, at last by radiating antenna 2 outputs.
Principle of work of the present invention: when power switch 11 is allocated to ON, power light 12 is bright, circuit working, and radiating antenna 2 gives off undesired signal, is used for system check.When low-voltage pilot lamp 14 was bright, the expression cell voltage was low, needed charging.Charge power supply is direct current DC6V, behind the overprotection treatment circuit, charges the battery.Because the voltage of battery can change along with the process of using and charging, and is bigger to the pectination effect of signals, therefore, must carries out voltage stabilizing to battery and handle.The present invention adopts bistable pressure technology, promptly after voltage detecting mu balanced circuit 51, handles through linear decompression voltage regulator 52, and cell voltage is judged, when undertension, low pressure pilot lamp 14 is bright, should charge; When voltage just often, power light 12 is bright, exports stable working power; Produce the radiation high frequency pectination undesired signal of amplitude stabilization, frequency range is between the 30MHz-1000MHz, and the frequency change-over switch has two grades; Be respectively 1MHz, 5MHz, or 2MHz, 10MHz, or 5MHz, 20MHz; Can change and customize the spectrum intervals of these frequency representative output signals according to actual needs.Two crystal oscillating circuits 53 and 54 produce two stable clock pulses respectively; Select to carry out frequency division shaping 56 again behind the circuit 55 through frequency division; Through step shaping circuit 57, produce time domain pulse width, front and back along the pulse steep, that amplitude is high, through Fourier transform; On frequency domain, form the abundant pectination spectral line of high frequency composition, at last by radiating antenna 2 outputs of 3 inches or 12 inches.
The radiation signal of output is measured through test macro, promptly obtains high frequency pectination signal spectrum as shown in Figure 5.
Among the present invention; Described voltage detecting voltage stabilizing 51, linear voltage decreasing mu balanced circuit 52; Its function is to detect and stable cell voltage, carries out linear voltage decreasing and secondary voltage stabilizing again, when cell voltage is changed in a big way; Can both export the WV of quite stable, reach the purpose that this device has bistable standard substance.Low-voltage detection circuit detects cell voltage, and when battery was not enough, low-voltage pilot lamp LOW BAT was bright, and circuit quits work.
Said frequency division is selected circuit 55, frequency division shaping circuit 56, step shaping circuit 57; Be to connect the circuit that frequency division selector switch (S5B) is formed to the crystal oscillation pulse of switch switch operating; Behind frequency division shaping circuit (VP); Form the signal of required radiation frequency characteristic; Again through capacitor C 18, C19, C20, the C21 height radio-frequency component that is coupled simultaneously, and, be shaped as the extremely abundant radiation pectination signal of harmonic wave to each order frequency composition through the step shaping circuit that the efficient recovery diode of quick step (DIODE) network is formed.
The signal spectrum of said aerial radiation 2 outputs, the spectrum intervals that different model machines produce can be different, and the profile envelope that height of spectral line forms can be different; But the frequency spectrum profiles envelope that same model machine produces is identical and stable.
The signal spectrum of said aerial radiation 2 outputs, highly stable concerning same model machine, basically not in time, temperature and changing, thereby can not verify the accuracy of instrument.
The foregoing description and graphic be not to qualification of the present invention, any under the those of ordinary skill of technical field to its suitable variation or modification of doing, all should be regarded as not breaking away from patent category of the present invention.
Claims (3)
1. bistable radiation pectination signal source; It is characterized in that: comprise screening can, radiating antenna, charge protection module, rechargeable battery and circuit board; Radiating antenna is connected on outward on the screening can, and charge protection module, rechargeable battery and circuit board are built in the screening can, and circuit board comprises that voltage detecting mu balanced circuit, linear voltage decreasing mu balanced circuit, two crystal oscillating circuits, frequency divisions select circuit, frequency division shaping circuit, step shaping circuit; Charge power supply is charged to rechargeable battery through the additives for overcharge protection module; Supply power to said circuit board by rechargeable battery,, produce two frequencies and the pulse of spoke degree stable clock respectively through two crystal oscillating circuits again through voltage detecting mu balanced circuit and the stable working power of linear voltage decreasing mu balanced circuit output; Select to carry out the frequency division shaping again behind the circuit through frequency division; Through the step shaping circuit, produce time domain pulse width, front and back along the pulse steep, that amplitude is high, through Fourier transform; On frequency domain, form the abundant pectination spectral line of high frequency composition, export by radiating antenna at last.
2. a kind of bistable radiation pectination signal source as claimed in claim 1; It is characterized in that: power switch, power light, frequency change-over switch, low-voltage pilot lamp and DC DC charging socket are installed on the said screening can; One end of frequency change-over switch is connected with the linear voltage decreasing mu balanced circuit and the other end select to switch and to be connected with one of them crystal oscillating circuit; The low-voltage pilot lamp is connected with low-voltage detection circuit also whether display voltage is not enough, and the input end that DC DC charging socket is located at the charge protection module is connected with charge power supply.
3. a kind of bistable radiation pectination signal source as claimed in claim 1, it is characterized in that: the top of said screening can is provided with BNC socket, and radiating antenna is installed on the screening can through BNC socket, and the length of radiating antenna is 3 inches or 12 inches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105064868A CN101975878B (en) | 2010-09-26 | 2010-09-26 | Bistable radiation comb signal source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105064868A CN101975878B (en) | 2010-09-26 | 2010-09-26 | Bistable radiation comb signal source |
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| Publication Number | Publication Date |
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| CN101975878A CN101975878A (en) | 2011-02-16 |
| CN101975878B true CN101975878B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105064868A Expired - Fee Related CN101975878B (en) | 2010-09-26 | 2010-09-26 | Bistable radiation comb signal source |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592478A (en) * | 2012-08-17 | 2014-02-19 | 鸿富锦精密工业（深圳）有限公司 | Radiation signal source |
| CN103713166B (en) * | 2013-11-07 | 2016-05-11 | 威凯检测技术有限公司 | A kind of light fixture EMC testing standard sample |
| CN107228987B (en) * | 2017-06-09 | 2020-03-20 | 中国电器科学研究院股份有限公司 | Special capability verification method for electric vehicle electromagnetic field test and comb signal generator |
| CN107703388A (en) * | 2017-09-28 | 2018-02-16 | 北京计算机技术及应用研究所 | A kind of simulation harassing and wrecking source for electromagnetic compatibility diagnosis |
| CN112730932A (en) * | 2020-12-23 | 2021-04-30 | 广州广电计量检测股份有限公司 | Comb spectrum signal generating system |
| CN113721054A (en) * | 2021-07-15 | 2021-11-30 | 宁波市信测检测技术有限公司 | Comb signal generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258327Y (en) * | 1996-06-28 | 1997-07-23 | 清华大学 | High-resolution and broadband linear frequency-scanning signal resource |
| CN2288551Y (en) * | 1997-03-04 | 1998-08-19 | 深圳市华为技术有限公司 | Timing signal generator |
| CN101059554A (en) * | 2007-04-28 | 2007-10-24 | 何毓宁 | Specific exciting frequency accumulator on-line internal resistance four-line measurement method and signal source device |
| CN201828583U (en) * | 2010-09-26 | 2011-05-11 | 厦门出入境检验检疫局检验检疫技术中心 | Bi-stable radiation comb-shaped signal source |
-
2010
- 2010-09-26 CN CN2010105064868A patent/CN101975878B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258327Y (en) * | 1996-06-28 | 1997-07-23 | 清华大学 | High-resolution and broadband linear frequency-scanning signal resource |
| CN2288551Y (en) * | 1997-03-04 | 1998-08-19 | 深圳市华为技术有限公司 | Timing signal generator |
| CN101059554A (en) * | 2007-04-28 | 2007-10-24 | 何毓宁 | Specific exciting frequency accumulator on-line internal resistance four-line measurement method and signal source device |
| CN201828583U (en) * | 2010-09-26 | 2011-05-11 | 厦门出入境检验检疫局检验检疫技术中心 | Bi-stable radiation comb-shaped signal source |
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| CN101975878A (en) | 2011-02-16 |
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Granted publication date: 20121114 Termination date: 20160926 |