CN217504658U - System for measuring and calculating cable length by using balun device - Google Patents
System for measuring and calculating cable length by using balun device Download PDFInfo
- Publication number
- CN217504658U CN217504658U CN202220255085.8U CN202220255085U CN217504658U CN 217504658 U CN217504658 U CN 217504658U CN 202220255085 U CN202220255085 U CN 202220255085U CN 217504658 U CN217504658 U CN 217504658U
- Authority
- CN
- China
- Prior art keywords
- balun
- coaxial cable
- measuring
- length
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses an use system that balun device calculated cable length, include: the signal generator is used for providing electric signals with various frequencies, waveforms and output levels, and is used as a signal source or an excitation source for testing when measuring the amplitude characteristics, the frequency characteristics, the transmission characteristics and other electric parameters of various telecommunication systems or telecommunication equipment and measuring the characteristics and parameters of components; the coaxial cable is used for realizing electric wire and signal transmission; the balun is used for a balance-to-unbalance action and an impedance conversion action and is used for a balun of a twisted pair; and an oscilloscope for converting various waveform curves of signal amplitude changing with time into the waveform curves such as voltage, current, frequency, phase difference or amplitude modulation; the utility model discloses practical simple, the time difference of the incident wave and the back wave that can test coaxial cable calculates coaxial cable's length. The measuring scheme is accurate, and the length of the coaxial cable to be verified can be measured accurately.
Description
Technical Field
The utility model relates to the technical field of cables, and more specifically relate to a system for use balun device to calculate cable length.
Background
The balun has a balance-to-unbalance action and an impedance conversion action and is used for a twisted pair balun, the length of a coaxial cable can be measured directly through a measuring tape usually, but some cables with longer lengths cannot be measured directly, so that the working difficulty is high, and the use is extremely inconvenient.
The utility model discloses an use BALUN device to calculate cable length's method, this scheme comprises signal generator, oscilloscope, BALUN (BALUN), coaxial cable etc. realizes being used for measuring the length of unknown coaxial cable through calculating to use in the engineering application. Mainly for research and development stages aiming at measurements that cannot be made by directly measuring the cable length.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned technique, the utility model discloses an use system that balun device calculated cable length, the utility model discloses practical simple, the incident wave that can test coaxial cable and the time difference of back wave calculate coaxial cable's length. The measuring scheme is accurate, and the length of the coaxial cable to be verified can be measured accurately.
The utility model adopts the following technical scheme: a system for measuring cable length using a balun device, comprising:
the signal generator is used for providing electric signals with various frequencies, waveforms and output levels, and is used as a signal source or an excitation source for testing when measuring the amplitude characteristics, the frequency characteristics, the transmission characteristics and other electric parameters of various telecommunication systems or telecommunication equipment and measuring the characteristics and parameters of components;
the coaxial cable is used for realizing electric wire and signal transmission;
the balun is used for a balance-to-unbalance action and an impedance conversion action and is used for a balun of a twisted pair; and
the oscilloscope is used for converting an invisible electric signal into a visible image, so that a user can conveniently research the change process of various electric phenomena; converting the waveform curves of various signal amplitudes changing along with time into waveforms such as voltage, current, frequency, phase difference or amplitude modulation;
the output end of the signal generator is connected with the input end of the coaxial cable, the output end of the coaxial cable is connected with the input end of the balun, the output end of the balun is connected with the input end of the coaxial cable, and the output end of the coaxial cable is connected with the input end of the oscilloscope.
In the utility model, the excitation source output by the signal generator is a square wave signal with rising edge time of 30 ps;
the utility model discloses in, balun is provided with SMA input and first SMA output and second SMA output.
The utility model discloses in, the SMA input of balun is connected with signal generator, and first SMA output is connected with oscilloscope, and second SMA output is unsettled.
The utility model discloses in, oscilloscope measures the time difference of the incident wave and the back wave of coaxial cable and is 6 ns.
The utility model discloses in, when oscilloscope measured the time difference of coaxial cable's incident wave and back wave was 6ns, coaxial cable's length was 63 cm.
Has the positive and beneficial effects that:
the utility model discloses practical simple, the time difference of the incident wave and the back wave that can test coaxial cable calculates coaxial cable's length. The measuring scheme is accurate, and the length of the coaxial cable to be verified can be measured accurately.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive labor, wherein:
fig. 1 is a system for measuring and calculating a cable length using a balun device according to the present invention;
fig. 2 is a schematic view of an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that the embodiments described herein are merely illustrative and explanatory of the present invention, and are not restrictive of the invention.
As shown in fig. 1-2, the utility model discloses a system for using balun device to measure and calculate cable length includes:
the signal generator is used for providing electric signals with various frequencies, waveforms and output levels, and is used as a signal source or an excitation source for testing when measuring the amplitude characteristics, the frequency characteristics, the transmission characteristics and other electric parameters of various telecommunication systems or telecommunication equipment and measuring the characteristics and parameters of components;
the coaxial cable is used for realizing electric wire and signal transmission;
the balun is used for a balance-to-unbalance action and an impedance conversion action and is used for a balun of a twisted pair; and
the oscilloscope is used for converting an invisible electric signal into a visible image, so that a user can conveniently research the change process of various electric phenomena; converting the waveform curves of various signal amplitudes changing along with time into waveforms such as voltage, current, frequency, phase difference or amplitude modulation;
the output end of the signal generator is connected with the input end of the coaxial cable, the output end of the coaxial cable is connected with the input end of the balun, the output end of the balun is connected with the input end of the coaxial cable, and the output end of the coaxial cable is connected with the input end of the oscilloscope.
In the utility model, the excitation source output by the signal generator is a square wave signal with rising edge time of 30 ps;
the utility model discloses in, balun is provided with SMA input and first SMA output and second SMA output.
The utility model discloses in, the SMA input of balun is connected with signal generator, and first SMA output is connected with oscilloscope, and second SMA output is unsettled.
The utility model discloses in, oscilloscope measures the time difference of the incident wave and the back wave of coaxial cable and is 6 ns.
In the present invention, when the time difference between the incident wave and the reflected wave of the coaxial cable measured by the oscilloscope is 6ns, the length of the coaxial cable is 63 cm.
The invention will be described in conjunction with specific embodiments for a better understanding of the invention.
As shown in fig. 2, the present invention is configured by a signal generator, an oscilloscope, a BALUN (BALUN), a coaxial cable, etc., and is implemented by calculating the length of the unknown coaxial cable, and is used in engineering applications. As shown in fig. 2.
In a particular embodiment, the signal generator is a device that can provide electrical signals of various frequencies, waveforms, and output levels. In measuring amplitude characteristics, frequency characteristics, transmission characteristics and other electrical parameters of various telecommunication systems or telecommunication equipment, and in measuring characteristics and parameters of components, it is used as a signal source or a stimulus source for testing, where a square wave signal with a rising edge time of 30ps is used as the stimulus source. The balun has a balance-to-unbalance action and an impedance transformation action, is used for a twisted pair balun, and is provided with an SMA input end (shown as an A point) at one end and an SMA output end (shown as B, C points) at the other end, as shown in figure 2, the A point is connected with a signal generator, the B point is connected with an oscilloscope, the C point is suspended, the time difference between incident wave and reflected wave of the rising edge of a fast edge signal at the B point is measured through the oscilloscope, then the coaxial cable to be tested is connected to the C point, the time difference between the incident wave and the reflected wave of the rising edge of the fast edge signal is measured once, the two measurement results are subtracted, so that the accurate time difference between the incident wave and the reflected wave of the coaxial cable to be tested can be obtained, and the length of the coaxial cable to be tested is measured according to calculation.
When the scheme is used for verification, firstly, an environment diagram is built according to the diagram 2, then the coaxial cable to be tested is connected to the position of the port C, the time difference between the incident wave and the reflected wave of the coaxial cable is measured by an oscilloscope to be 6ns, the length of the coaxial cable corresponding to 6ns is calculated to be 63cm at the moment, and the comparison is consistent with the actual measurement by a tape measure, so that the scheme is correct. The scheme is simple to implement, and the length of the coaxial cable to be verified can be accurately measured.
The utility model discloses it is practical simple, can test coaxial cable's incident wave and the time difference of back wave, calculate coaxial cable's length. The measuring scheme is accurate, and the length of the coaxial cable to be verified can be measured accurately.
Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that these specific embodiments are merely illustrative and that various omissions, substitutions and changes in the form and details of the methods and systems described above may be made by those skilled in the art without departing from the spirit and scope of the invention. For example, it is within the scope of the present invention to combine the above-described method steps to perform substantially the same function in substantially the same way to achieve substantially the same result. Accordingly, the scope of the invention is to be limited only by the following claims.
Claims (6)
1. A system for measuring and calculating cable length using balun devices, comprising: the method comprises the following steps:
the signal generator is used for providing electric signals with various frequencies, waveforms and output levels, and is used as a signal source or an excitation source for testing when measuring the amplitude characteristics, the frequency characteristics, the transmission characteristics and other electric parameters of various telecommunication systems or telecommunication equipment and measuring the characteristics and parameters of components;
the coaxial cable is used for realizing electric wire and signal transmission;
the balun is used for a balance-to-unbalance action and an impedance conversion action and is used for a balun of a twisted pair; and
the oscilloscope is used for converting an invisible electric signal into a visible image, so that a user can conveniently research the change process of various electric phenomena; converting the waveform curve of various signal amplitudes changing along with time into the waveform curve such as voltage, current, frequency, phase difference or amplitude modulation;
the output end of the signal generator is connected with the input end of the coaxial cable, the output end of the coaxial cable is connected with the input end of the balun, the output end of the balun is connected with the input end of the coaxial cable, and the output end of the coaxial cable is connected with the input end of the oscilloscope.
2. The system for measuring and calculating the length of the cable by using the balun device as claimed in claim 1, wherein: the excitation source output by the signal generator is a square wave signal with the rising edge time of 30 ps.
3. The system for measuring and calculating the length of the cable by using the balun device as claimed in claim 1, wherein: the balun is provided with an SMA input end, a first SMA output end and a second SMA output end.
4. The system for measuring and calculating the length of the cable by using the balun device as claimed in claim 1, wherein: the SMA input end of the balun is connected with the signal generator, the first SMA output end is connected with the oscilloscope, and the second SMA output end is suspended.
5. The system for measuring and calculating the length of the cable by using the balun device as claimed in claim 1, wherein: the oscilloscope measures the time difference between the incident wave and the reflected wave of the coaxial cable to be 6 ns.
6. The system for measuring and calculating the length of the cable by using the balun device as claimed in claim 1, wherein: when the oscilloscope measures the time difference between the incident wave and the reflected wave of the coaxial cable to be 6ns, the length of the coaxial cable is 63 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220255085.8U CN217504658U (en) | 2022-02-08 | 2022-02-08 | System for measuring and calculating cable length by using balun device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220255085.8U CN217504658U (en) | 2022-02-08 | 2022-02-08 | System for measuring and calculating cable length by using balun device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217504658U true CN217504658U (en) | 2022-09-27 |
Family
ID=83346576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220255085.8U Active CN217504658U (en) | 2022-02-08 | 2022-02-08 | System for measuring and calculating cable length by using balun device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217504658U (en) |
-
2022
- 2022-02-08 CN CN202220255085.8U patent/CN217504658U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109324248B (en) | Integrated vector network analyzer for data domain analysis and testing method thereof | |
| CN108318852B (en) | Square wave influence test method for intelligent electric energy meter | |
| CN110988774A (en) | Calibration method and system of electromagnetic pulse electric field probe | |
| CN109639345B (en) | Cable bandwidth testing method based on Time Domain Reflectometry (TDR) technology | |
| US10191092B2 (en) | Time domain measuring method with calibration in the frequency range | |
| CN103529261A (en) | Device and method for measuring time-domain waveforms of ultrafast pulses | |
| CN104270208A (en) | Method and device for detecting standing-wave ratio of RRU | |
| JP3234339B2 (en) | Power measuring apparatus and method | |
| CN107656226B (en) | HFCT electrical parameter test device and test method based on transmission coefficient | |
| CN105606885B (en) | A kind of pulse power measurement system based on intermediate frequency substitute technology | |
| CN208350944U (en) | The test macro of Millimeter Wave Pulsed power amplifier chip | |
| Shi et al. | Detection and location of single cable fault by impedance spectroscopy | |
| CN217504658U (en) | System for measuring and calculating cable length by using balun device | |
| CN105572452B (en) | A kind of Gaussian beam group average current measuring method of particle accelerator under quasi-continuous operation state | |
| CN106896270A (en) | A kind of measuring method of transmission line impedance | |
| WO2023284679A1 (en) | Apparatus and method for calibrating complex frequency response of sampling oscilloscope | |
| CN110471019B (en) | Ultrahigh frequency partial discharge sensor performance detection method and system | |
| CN110531298A (en) | Ultra high-frequency partial discharge sensor performance improvement detection method and system | |
| CN112763082B (en) | Picosecond-level pulse waveform parameter measuring device and method based on photoconductive technology | |
| WO2007090467A1 (en) | Detecting a transmission behavior by sampling a reflection signal | |
| US8285503B1 (en) | Balanced two-conductor time domain reflectometer | |
| CN109188375B (en) | System and method for generating radio simulation height by adopting synchronous signal excitation | |
| Karnas et al. | Calibration of electric field antennae operating in the ELF-MF frequency range at the lightning research station in Rzeszow | |
| CN106872820B (en) | Method for measuring eye pattern based on vector network analyzer | |
| Kurokawa et al. | Time-domain three antenna method for biconical antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |