CN110426665A - A kind of signal generator of automotive electronics electromagnetic compatibility test place verifying - Google Patents
A kind of signal generator of automotive electronics electromagnetic compatibility test place verifying Download PDFInfo
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- CN110426665A CN110426665A CN201910798508.3A CN201910798508A CN110426665A CN 110426665 A CN110426665 A CN 110426665A CN 201910798508 A CN201910798508 A CN 201910798508A CN 110426665 A CN110426665 A CN 110426665A
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- capacitor
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- crystal oscillator
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- signal generator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
A kind of signal generator of automotive electronics electromagnetic compatibility test place verifying, it is to be made of battery, filter, first capacitor, resistance, antenna and crystal oscillator, filter is made of the second capacitor, third capacitor, the 4th capacitor and magnet ring, battery is connected by the foot 4 of filter and crystal oscillator, the foot 3 of crystal oscillator is connect with antenna, resistance is connected on the circuit between crystal oscillator and antenna, first capacitor one end is connect with antenna, the other end of first capacitor is grounded, and the foot 2 of crystal oscillator is grounded.It is signal stabilization of the present invention, low in energy consumption, at low cost, the signal amplitude that the present invention emits linear change with the variation of supply voltage, furthermore by adjusting the length of antenna, the amplitude of tuning frequency point can be guaranteed to the saturated characteristic of the sufficiently strong verifying test system of signal of radiation.
Description
Technical field
The present invention relates to a kind of electromagnetic compatibility place checking signal generators, try especially suitable for electromagnetic compatibility radiation disturbance
Verifying is met to place system before testing, guarantees the consistency before and after test site system.
Background technique
The EMC emission test of automotive electronics electromagnetic compatibility is related to each test component of system, receiver, cable, letter
Number amplifier, cable end port connections, attenuator, the characteristic and mutual connection for testing antenna (especially active antenna)
Matching is based on 1 meter of method near-field test especially in automotive electronics electromagnetic compatibility standard.Different factors can generate test result
Different Effects.There are problems that an impedance matching, antenna output impedance 50ohm, due to antenna between antenna and cable
Characteristic, the 50ohm output impedance characteristic of antenna and the bad matching of cable impedance characteristic, are easy to produce non-correlation in this way.It receives
Machine, signal amplifier and active antenna are sensitive to signal, and especially big signal be easy to cause overload, and such phenomenon is easy to test
The original characteristic of component damages, and causes the inaccuracy of test result.Accuracy in order to ensure the test results with it is consistent
Property, the compatible EMC emission test place of verifying electromagnetic must be gone to guarantee one before test using a stable signal generator every time
Cause property.At present for the signal generator of use other than cost is very expensive, all have the shortcomings that respective:
1) signal generator for using portable, battery powered, when signal generator works, due to needing continuously ceaselessly
The electromagnetic wave band for radiating wide section is very easy to consumption signal generator battery capacity, after battery capacity decline, portable signal
The signal and nonlinear change of generator transmitting, therefore the signal results tested are very difficult to guarantee the accuracy of signal.
2) desk-top signal generator, signal stabilization but very inconvenient in Ground arrangement are used.
Summary of the invention
In order to solve practical problem existing for current signal generator, the present invention provide it is a kind of it is signal-stabilized, low in energy consumption,
The signal generator of automotive electronics electromagnetic compatibility test place verifying at low cost.The signal amplitude that the present invention emits is with power supply electricity
The amplitude of tuning frequency point can be guaranteed the signal of radiation furthermore by adjusting the length of antenna by the variation of pressure and linear change
The saturated characteristic of sufficiently strong verifying test system.
The present invention is made of battery, filter, first capacitor, resistance, antenna and crystal oscillator, and filter is by
Two capacitors, third capacitor, the 4th capacitor and magnet ring are constituted, and battery passes through the power end VCC connection of filter and crystal oscillator,
The output end OUT of crystal oscillator is connect with antenna, and resistance is connected on the circuit between crystal oscillator and antenna, the first electricity
Hold one end to connect with antenna, the other end ground connection of first capacitor, the ground terminal GND ground connection of crystal oscillator.
The model SG-210SCBA of the crystal oscillator.
The battery is 18650 battery of Panasonic.
The crystal oscillator is temperature control type crystal oscillator.
The antenna uses coaxial cable.
The resistance value of the resistance is 10 Ω；The capacitance of first capacitor is 10pF；The capacitance of second capacitor is 0.01 μ
F；The capacitance of third capacitor is 0.1 μ F；The capacitance of 4th capacitor is 4.7 μ F.
The course of work of the invention:
Operating current 2.84mA of the invention, power supply use 18650 battery of the Panasonic stabilization signal long-term enough of large capacity
The normal work of generator, and reduce other DC power supply bring clutters；Second capacitor, third capacitor, the 4th capacitor and magnetic
The filter of ring composition plays a filtering role, it is ensured that the pure stabilization of power supply.Resistance guarantees day using the resistance of 10 Ω
The impedance matching of line, the back wave for reducing antenna improve emission effciency, and first capacitor plays sliding wave to output waveform, is conducive to
Waveform stablizes output.Crystal oscillator uses temperature control type crystal oscillator, the maximum feature temperature of temperature control type crystal oscillator
It deviates small while highly stable.Antenna uses coaxial cable material, and antenna length is added according to the amplitude of actual requirement frequency
Work.By adjusting the length of antenna, the amplitude of tuning frequency point can be guaranteed to the sufficiently strong verifying test system of signal of radiation
Saturated characteristic.
Test verifying is carried out to the present invention by using 1 meter of method of telescopic antenna in CISPR25 standard.Antenna of the invention
When length is 5cm, test data as shown in Fig. 2, as the supply voltage 4VDC of voltage signal generator, telescopic antenna test
Field strength is 84v/m, as the intensity of the reduction test field strength of voltage is substantially linear reduction, reduces voltage to 2.8VDC
When, the field strength of test is 72.3v/m.By testing above data, linear very good, the Neng Goufei of supply voltage and test field strength
Often stablize the consistency in evaluation place.
Beneficial effects of the present invention:
Signal stabilization of the present invention, low in energy consumption, at low cost, the signal amplitude that the present invention emits line with the variation of supply voltage
Property variation furthermore by adjusting the length of antenna the amplitude of tuning frequency point being guaranteed to, the enough strong authentications of signal of radiation are surveyed
The saturated characteristic of test system.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Fig. 2 is the relational graph of supply voltage and test field strength of the invention.
Specific embodiment
Refering to Figure 1, the present invention is shaken by battery 1, filter 2, first capacitor C1, resistance R1, antenna 3 and crystal
The composition of device 4 is swung, filter 2 is made of the second capacitor C2, third capacitor C3, the 4th capacitor C4 and magnet ring FB-1, and battery 1 passes through
Filter 2 is connect with the power end VCC of crystal oscillator 4, and the output end OUT of crystal oscillator 4 is connect with antenna 3, resistance R1
It is connected on the circuit between crystal oscillator 4 and antenna 3, the one end first capacitor C1 is connect with antenna 3, and first capacitor C1's is another
One end ground connection, the ground terminal GND ground connection of crystal oscillator 4.
The model SG-210SCBA of the crystal oscillator 4.
The battery 1 is 18650 battery of Panasonic.
The crystal oscillator 4 is temperature control type crystal oscillator.
The antenna 3 uses coaxial cable.
The resistance value of the resistance R1 is 10 Ω；The capacitance of first capacitor C1 is 10pF；The capacitance of second capacitor C2
For 0.01 μ F；The capacitance of third capacitor C3 is 0.1 μ F；The capacitance of 4th capacitor C4 is 4.7 μ F.
The course of work of the invention:
As shown in Figure 1, operating current 2.84mA of the invention, power supply uses the 18650 battery long enough of Panasonic of large capacity
The normal work of phase stabilization signal generator, and reduce other DC power supply bring clutters；Second capacitor C2, third capacitor
The filter of C3, the 4th capacitor C4 and magnet ring FB-1 composition plays a filtering role, it is ensured that the pure stabilization of power supply.Resistance R1 is adopted
Guarantee the impedance matching of antenna 3 with the resistance of 10 Ω, the back wave for reducing antenna 3 improves emission effciency, first capacitor
C1 plays sliding wave to output waveform, stablizes output conducive to waveform.Crystal oscillator 4 uses temperature control type crystal oscillator, temperature
The maximum feature temperature drift of control type crystal oscillator is small while highly stable.Antenna 3 uses coaxial cable material, antenna length
It is processed according to the amplitude of actual requirement frequency.By adjusting the length of antenna, the amplitude of tuning frequency point can be guaranteed into spoke
The saturated characteristic of the sufficiently strong verifying test system of the signal penetrated.
Test verifying is carried out to the present invention by using 1 meter of method of telescopic antenna in CISPR25 standard.Antenna of the invention
When 3 length are 5cm, test data as shown in Fig. 2, as the supply voltage 4VDC of voltage signal generator, test by telescopic antenna
Field strength be 84v/m, as the intensity of the reduction test field strength of voltage is substantially linear reduction, reduce voltage to 2.8VDC
When, the field strength of test is 72.3v/m.By testing above data, linear very good, the Neng Goufei of supply voltage and test field strength
Often stablize the consistency in evaluation place.
Claims (3)
1. a kind of signal generator of automotive electronics electromagnetic compatibility test place verifying, it is characterised in that: be by battery (1), filter
Wave device (2), first capacitor (C1), resistance (R1), antenna (3) and crystal oscillator (4) are constituted, and filter (2) is by the second electricity
Hold (C2), third capacitor (C3), the 4th capacitor (C4) and magnet ring (FB-1) to constitute, battery (1) is shaken by filter (2) and crystal
The power end VCC connection of device (4) is swung, the output end OUT of crystal oscillator (4) is connect with antenna (3), and resistance (R1) is connected on crystalline substance
On circuit between oscillation body device (4) and antenna (3), first capacitor one end (C1) is connect with antenna (3), first capacitor (C1)
Other end ground connection, the ground terminal GND ground connection of crystal oscillator (4).
2. a kind of signal generator of automotive electronics electromagnetic compatibility test place verifying according to claim 1, feature
It is: the model SG-210SCBA of the crystal oscillator (4)；The battery (1) is 18650 battery of Panasonic；It is described
Crystal oscillator (4) be temperature control type crystal oscillator；The antenna (3) uses coaxial cable.
3. a kind of signal generator of automotive electronics electromagnetic compatibility test place verifying according to claim 1, feature
Be: the resistance value of the resistance (R1) is 10 Ω；The capacitance of first capacitor (C1) is 10pF；The capacitor of second capacitor (C2)
Amount is 0.01 μ F；The capacitance of third capacitor (C3) is 0.1 μ F；The capacitance of 4th capacitor (C4) is 4.7 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798508.3A CN110426665A (en) | 2019-08-27 | 2019-08-27 | A kind of signal generator of automotive electronics electromagnetic compatibility test place verifying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910798508.3A CN110426665A (en) | 2019-08-27 | 2019-08-27 | A kind of signal generator of automotive electronics electromagnetic compatibility test place verifying |
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| Publication Number | Publication Date |
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| CN110426665A true CN110426665A (en) | 2019-11-08 |
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| CN201910798508.3A Pending CN110426665A (en) | 2019-08-27 | 2019-08-27 | A kind of signal generator of automotive electronics electromagnetic compatibility test place verifying |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986699A (en) * | 2021-03-29 | 2021-06-18 | 一汽奔腾轿车有限公司 | Automobile Bluetooth key electromagnetic compatibility test system and control method thereof |
| CN113075464A (en) * | 2021-03-30 | 2021-07-06 | 一汽奔腾轿车有限公司 | Vehicle-mounted three-in-one antenna electromagnetic compatibility test system and control method thereof |
| CN113419116A (en) * | 2021-06-18 | 2021-09-21 | 一汽奔腾轿车有限公司 | Passive performance test system and test method suitable for whole vehicle-level antenna |
-
2019
- 2019-08-27 CN CN201910798508.3A patent/CN110426665A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986699A (en) * | 2021-03-29 | 2021-06-18 | 一汽奔腾轿车有限公司 | Automobile Bluetooth key electromagnetic compatibility test system and control method thereof |
| CN113075464A (en) * | 2021-03-30 | 2021-07-06 | 一汽奔腾轿车有限公司 | Vehicle-mounted three-in-one antenna electromagnetic compatibility test system and control method thereof |
| CN113419116A (en) * | 2021-06-18 | 2021-09-21 | 一汽奔腾轿车有限公司 | Passive performance test system and test method suitable for whole vehicle-level antenna |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200312 Address after: 130000 No. 4888 Weishan Road, Changchun High-tech Zone, Jilin Province Applicant after: FAW Pentium Car Co., Ltd Address before: 130000 No. 4888 Weishan Road, Changchun High-tech Zone, Jilin Province Applicant before: FAW CAR Co., Ltd. |
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