CN101975878A - Bistable radiation comb signal source - Google Patents

Bistable radiation comb signal source Download PDF

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Publication number
CN101975878A
CN101975878A CN 201010506486 CN201010506486A CN101975878A CN 101975878 A CN101975878 A CN 101975878A CN 201010506486 CN201010506486 CN 201010506486 CN 201010506486 A CN201010506486 A CN 201010506486A CN 101975878 A CN101975878 A CN 101975878A
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China
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circuit
voltage
radiation
circuit board
bistable
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CN 201010506486
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CN101975878B (en
Inventor
钟冠平
许国进
李元密
何光平
刘佑明
林敬长
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XIAMEN XINZHITAI SCIENCE AND TECHNOLOGY Co Ltd
INSPECTION AND QUARANTINE CENTER OF XIAMEN ENTRY-EXIT INSPECTION AND QUARANTINE BUREAU
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XIAMEN XINZHITAI SCIENCE AND TECHNOLOGY Co Ltd
INSPECTION AND QUARANTINE CENTER OF XIAMEN ENTRY-EXIT INSPECTION AND QUARANTINE BUREAU
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Priority to CN2010105064868A priority Critical patent/CN101975878B/en
Publication of CN101975878A publication Critical patent/CN101975878A/en
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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

A kind of bistable radiation pectination signal source
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, 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, sends electromagnetic interference measurement, EMI measurement receiver RECEIVER to by cable after antenna receives.
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 by 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 radiating antenna and the charge protection module that is built in the screening can on the screening can outward; rechargeable battery and circuit board are formed; circuit board comprises the voltage detecting mu balanced circuit; the linear voltage decreasing mu balanced circuit; two crystal oscillating circuits; frequency division is selected circuit; the frequency division shaping circuit; the step shaping circuit; charge power supply is charged to rechargeable battery through the additives for overcharge protection module; power to the aftermentioned circuit board 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 the time domain pulse width; front and back are along steep; the pulse 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 described 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 illustrates 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, and the cell voltage deficiency is described, circuit board is not worked, and needs charging.
The top of described screening can is provided with BNC socket, and radiating antenna is installed on the screening can by BNC socket.
The length of described 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 as 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 by BNC socket 10.The length of radiating antenna 2 is 3 inches or 12 inches.
Circuit board 5 comprises that voltage detecting mu balanced circuit 51, linear voltage decreasing mu balanced circuit 52, two crystal oscillating circuits 53 and 54, frequency divisions select circuit 55 (as shown in Figure 6), frequency division shaping circuit 56 (as shown in Figure 6), step shaping circuit 57 (as shown in Figure 6).
Charge power supply is charged to rechargeable battery 4 through additives for overcharge protection module 3; power to aftermentioned circuit board 5 by rechargeable battery 4; through the stable working power of output after voltage detecting mu balanced circuit 51 and the linear voltage decreasing mu balanced circuit 52 bistable pressure technology; 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 the time domain pulse width; front and back are along steep; the pulse 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.
Power switch 11, power light 12, frequency change-over switch 13, low-voltage pilot lamp 14 and DC DC charging socket 15 are installed on the screening can 1 of this embodiment.Whether power switch 11 control circuit boards 5 switch on, and this power light 12 is lighted during energising, show "on" position.Frequency change-over switch 13 is a single-pole double-throw switch (SPDT), moving contact jaw is connected with linear voltage decreasing mu balanced circuit 52 and two quiet contact jaws are connected with 54 with two crystal oscillating circuits 53 respectively, and frequency change-over switch 13 is used for the linear decompression voltage regulator 52 of selection switching and is connected with one of them crystal oscillating circuit 53 or 54.Low-voltage pilot lamp 14 is connected with voltage detecting mu balanced circuit 51, and when undertension, this low-voltage pilot lamp 14 is lighted.DC DC charging socket 15 is located at the input end of charge protection module 3, is used for for be connected power supply with charge power supply.
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, export stable working power, produce the radiation high frequency pectination undesired signal of amplitude stabilization, frequency range is between the 30MHz-1000MHz, the frequency change-over switch has two grades, be respectively 1MHz, 5MHz, or 2MHz, 10MHz, or 5MHz, 20MHz, can change according to actual needs and customize, these frequencies are represented the spectrum intervals of output signal.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, carry out linear voltage decreasing and secondary voltage stabilizing again, when cell voltage is changed in a big way, can both export the operating voltage 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.
Described frequency division is selected circuit 55, frequency division shaping circuit 56, step shaping circuit 57, be that the crystal oscillation pulse of switch switch operating is connected the circuit that frequency division selector switch (S5B) is formed, behind frequency division shaping circuit (VP), form the signal of required radiation frequency feature, again by capacitor C 18, C19, C20, C21 be coupled simultaneously the height radio-frequency component, and, each order frequency composition is shaped as the extremely abundant radiation pectination signal of harmonic wave through the step shaping circuit that the efficient recovery diode of quick step (DIODE) network is formed.
The signal spectrum of described 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 described aerial radiation 2 outputs, highly stable concerning same model machine, substantially not in time, temperature and changing, thereby can not verify the accuracy of instrument.
The foregoing description and graphic be not limitation of the invention, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.

Claims (3)

1. bistable radiation pectination signal source; it is characterized in that: comprise screening can; be connected on radiating antenna and the charge protection module that is built in the screening can on the screening can outward; rechargeable battery and circuit board are formed; circuit board comprises the voltage detecting mu balanced circuit; the linear voltage decreasing mu balanced circuit; two crystal oscillating circuits; frequency division is selected circuit; the frequency division shaping circuit; the step shaping circuit; charge power supply is charged to rechargeable battery through the additives for overcharge protection module; power to the aftermentioned circuit board 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 the time domain pulse width; front and back are along steep; the pulse 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 described 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 described screening can is provided with BNC socket, and radiating antenna is installed on the screening can by BNC socket.The length of radiating antenna is 3 inches or 12 inches.
CN2010105064868A 2010-09-26 2010-09-26 Bistable radiation comb signal source Expired - Fee Related CN101975878B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
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
CN103713166A (en) * 2013-11-07 2014-04-09 威凯检测技术有限公司 Lamp product electromagnetic compatibility test standard sample
CN107228987A (en) * 2017-06-09 2017-10-03 中国电器科学研究院有限公司 Electric automobile electromagnetic field tests special proficiency testing method 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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
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
CN103713166A (en) * 2013-11-07 2014-04-09 威凯检测技术有限公司 Lamp product electromagnetic compatibility test standard sample
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
CN107228987A (en) * 2017-06-09 2017-10-03 中国电器科学研究院有限公司 Electric automobile electromagnetic field tests special proficiency testing method and comb signal generator
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
CN113721054B (en) * 2021-07-15 2024-06-28 宁波市信测检测技术有限公司 Comb signal generator

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