CN203849331U - Handheld standing-wave ratio detector - Google Patents
Handheld standing-wave ratio detector Download PDFInfo
- Publication number
- CN203849331U CN203849331U CN201420177388.8U CN201420177388U CN203849331U CN 203849331 U CN203849331 U CN 203849331U CN 201420177388 U CN201420177388 U CN 201420177388U CN 203849331 U CN203849331 U CN 203849331U
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- wave ratio
- standing
- housing
- circuit board
- processing circuit
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Abstract
A handheld standing-wave ratio detector comprises a housing, a liquid crystal display screen and a touch control panel are installed on the housing, a signal processing circuit board is installed in the housing, and a test interface and a battery chamber body are fixed on the signal processing circuit board. The signal processing circuit board comprises an MSP430 processor chip connected with an AD9834 signal generator, the MSP430 processor chip controls the AD9834 signal generator to generate DDS sampling signals, and the DDS sampling signals are output to the test interface through a power amplification processor and a filter. Compared with an existing standing-wave ratio detecting device, the handheld standing-wave ratio detector is light in weight, and cost is greatly reduced; and a data processing method combined with mean value and advance comparison is used, standing-wave ratio measuring speed is faster, and measured values are more accurate.
Description
Technical field
A kind of hand-held standing-wave ratio (SWR) of the utility model detector, relates to measure and control instrument field.
Background technology
Standing-wave ratio (SWR) size is the important indicator of antenna performance quality, and standing-wave ratio (SWR) is larger, means that loss is larger, and antenna gain is lower.At present, the domestic instrument that is specifically designed to SWR measurement is few, and expensive, equipment is heavy, complicated operation, can not simple and fast feedback metrical information.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of hand-held standing-wave ratio (SWR) detector, relatively existing standing wave ration detection device, and it is lightweight, cost significantly reduces; Adopt average and go forward one by one and compare the data processing method combining, making the measuring speed of standing-wave ratio (SWR) faster, measured value is more accurate.
The technical scheme that the utility model is taked is: hand-held standing-wave ratio (SWR) detector, comprise housing, LCDs, touch control panel are installed on housing, signal processing circuit board is installed in housing, on signal processing circuit board, be fixed with test interface, battery warehouse.Described signal processing circuit board comprises MSP430 processor chips, MSP430 processor chips connect AD9834 signal generator, MSP430 processor chips control AD9834 signal generator produces DDS sampled signal, after power amplification processor, wave filter, exports test interface to.
Described housing comprises upper shell, lower house, LCDs and touch control panel are fixed on upper shell by pressing plate, described signal processing circuit board is fixed on lower house by trip bolt, and described upper shell, lower house seal assembling by support column, forms all-sealed structure.Described housing adopts teflon material.Described test interface is RFOUT port.
The utility model provides a kind of hand-held standing-wave ratio (SWR) detector, and technique effect is as follows: adopt pressing plate LCDs, touch control panel to be fixed on to the same level of upper shell, and by support column, upper shell and lower house are fitted together.Not only exquisite appearance but also good airproof performance.Adopt polytetrafluoroethylmaterial material, significantly alleviated the weight of equipment, be convenient for carrying.
Brief description of the drawings
Fig. 1 is the utility model hand-held standing-wave ratio (SWR) detector structural representation.
Fig. 2 is standing-wave ratio (SWR) curve map.
Embodiment
As shown in Figure 1, hand-held standing-wave ratio (SWR) detector, comprises housing 6, and LCDs 1, touch control panel 2 are installed on housing 6, and signal processing circuit board 3 is installed in housing 6, is fixed with test interface 5, battery warehouse 4 on signal processing circuit board 3; Described signal processing circuit board comprises MSP430 processor chips, MSP430 processor chips connect AD9834 signal generator, MSP430 processor chips control AD9834 signal generator produces DDS sampled signal, exports test interface 5 after power amplification processor, wave filter to.Described housing 6 comprises upper shell, lower house, LCDs 1 and touch control panel 2 are fixed on upper shell by pressing plate, described signal processing circuit board 3 is fixed on lower house by trip bolt, and described upper shell, lower house, by support column 7 sealing assemblings, form all-sealed structure.Described housing 6 adopts teflon material.Described test interface 5 is RFOUT port.
A measuring method of measuring the Intelligent treatment measuring error Real-time Feedback of antenna standing wave ratio, measuring process comprises following steps:
Step 1: according to user's demand, test frequency scope is set, for example, generally selects 7.0MHZ ~ 25.0MHZ for the antenna measurement frequency of ground wave radar.And intelligent decision goes out the logical scope of band of filtering, automatically open the wave filter of different frequency by switch chip.
Step 2:MSP430 processor chips control AD9834 signal generator, the DDS sampled signal of 7.0MHZ ~ 25.0MHZ range frequencies that generation stepping is 0.1MHZ, through power amplification processor RF2360 and filtering circuit, be finally sent to antenna to be checked by RFOUT port.
Step 3, is sampled respectively and is transmitted voltage, DDS signal by power amplifier and filter process by two-way digital-to-analogue sample circuit, after magnet ring and antenna feedback voltage.By calculating standing-wave ratio (SWR) Vswr,
Vswr=
=
; Or Vswr=
Wherein: R is input impedance, r is output impedance, and L is reflection coefficient,
incident voltage (voltage transmits),
reflected voltage (being antenna feedback voltage).
Step 4: the standing-wave ratio (SWR) parameter calculating is carried out to error analysis, adopt average and the invalid value of the method rejecting sudden change that the comparison of going forward one by one combines.It is 10 times that averaging method repeatedly adopts to each frequency emissioning signal voltage and antenna feedback voltage that sample device sets exactly, then averages; The comparison of going forward one by one is exactly according to standing-wave ratio (SWR) and frequency change relation, as shown in Figure 2.According to the step frequency arranging, (this device is set as 0.1MHZ) divides into groups to compare, the survey frequency scope of for example setting is 7.0-12MHZ, step frequency is 0.1MHZ, system is for being automatically divided into survey frequency 4 groups so, then the close frequencies of every group is asked to its slope: standing-wave ratio (SWR) difference, than upper survey frequency difference, is finally organized interior comparison and adjacent set comparison.And the employing of this equipment is the data processing method that two kinds of modes are combined, first each frequency sampling signal is carried out to 10 samplings, ask its mean value, then the sampled signal of side frequency is asked to its slope, slope is compared and judged data, judge that if there is slope sudden change situation this value is that invalid value or exceptional value are rejected resampling, the data of finally finishing dealing with are depicted as chart.
Each frequency band is divided into some set of samples, and every group of sampling density regulates by step frequency value, rejects if there is abnormal value, finally draws standing-wave ratio (SWR) curve according to the result after data processing, as shown in Figure 2.
Claims (4)
1. hand-held standing-wave ratio (SWR) detector, comprise housing (6), LCDs (1), touch control panel (2) are installed on housing (6), it is characterized in that, signal processing circuit board (3) is installed in housing (6), on signal processing circuit board (3), is fixed with test interface (5), battery warehouse (4); Described signal processing circuit board comprises processor chips, and processor chips connect signal generator, and processor chips control signal generator produces DDS sampled signal, exports test interface (5) after power amplification processor, wave filter to.
2. hand-held standing-wave ratio (SWR) detector according to claim 1, it is characterized in that, described housing (6) comprises upper shell, lower house, LCDs (1) and touch control panel (2) are fixed on upper shell by pressing plate, described signal processing circuit board (3) is fixed on lower house by trip bolt, and described upper shell, lower house are by support column (7) sealing assembling.
3. according to hand-held standing-wave ratio (SWR) detector described in claim 1 or 2, it is characterized in that, described housing (6) adopts teflon material.
4. according to hand-held standing-wave ratio (SWR) detector described in claim 1 or 2, it is characterized in that, described test interface (5) is RFOUT port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177388.8U CN203849331U (en) | 2014-04-14 | 2014-04-14 | Handheld standing-wave ratio detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177388.8U CN203849331U (en) | 2014-04-14 | 2014-04-14 | Handheld standing-wave ratio detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203849331U true CN203849331U (en) | 2014-09-24 |
Family
ID=51562332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420177388.8U Expired - Fee Related CN203849331U (en) | 2014-04-14 | 2014-04-14 | Handheld standing-wave ratio detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203849331U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954838A (en) * | 2014-04-14 | 2014-07-30 | 中船重工中南装备有限责任公司 | Hand-held standing wave ratio measurer |
| CN104849561A (en) * | 2015-04-14 | 2015-08-19 | 西安电子科技大学 | Method for calculating standing-wave ratio in high precision under low-sampling rate and under-sampling rate |
-
2014
- 2014-04-14 CN CN201420177388.8U patent/CN203849331U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954838A (en) * | 2014-04-14 | 2014-07-30 | 中船重工中南装备有限责任公司 | Hand-held standing wave ratio measurer |
| CN104849561A (en) * | 2015-04-14 | 2015-08-19 | 西安电子科技大学 | Method for calculating standing-wave ratio in high precision under low-sampling rate and under-sampling rate |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20160414 |