CN214755501U - Protection device for long-distance signal transmission - Google Patents
Protection device for long-distance signal transmission Download PDFInfo
- Publication number
- CN214755501U CN214755501U CN202023236267.0U CN202023236267U CN214755501U CN 214755501 U CN214755501 U CN 214755501U CN 202023236267 U CN202023236267 U CN 202023236267U CN 214755501 U CN214755501 U CN 214755501U
- Authority
- CN
- China
- Prior art keywords
- shielding layer
- signal line
- signal
- return signal
- transmission
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model discloses a protection device for long-distance signal transmission, which comprises an acquisition circuit, a sensor and a driver, wherein a return signal line and an excitation signal line are arranged between the acquisition circuit and the sensor, and the driver is connected with the return signal line through a driving signal line; the electromagnetic shielding device is characterized in that an inner shielding layer and an outer shielding layer are arranged on the return signal line, the inner shielding layer is a single wire core shielding layer, the outer shielding layer is an electromagnetic shielding layer, and a driving signal which is completely consistent with a wire core signal of the return signal line is applied to the inner shielding layer of the return signal line. The utility model discloses eliminated cable distribution electric capacity and to measuring signal's influence, made test equipment need not to carry out secondary debugging and calibration, improved and used and maintenance efficiency. The utility model does not need to strictly control the distributed capacitance of the long cable, thus reducing the manufacturing difficulty and the inspection requirement of the cable; the transmission signal is not influenced by the distributed capacitance, the transmission distance of the signal is increased, and the practicability is better.
Description
Technical Field
The utility model belongs to the technical field of signal transmission, concretely relates to signal long distance transmission's protection device.
Background
In the measurement and control technology, signals of various sensors are generally required to be transmitted. Since the transmission signal of the sensor is usually a low-energy analog signal and is easily affected by electromagnetic interference during transmission, the cable is usually protected electromagnetically by a shielding wire. Because form distributed capacitance (or called parasitic capacitance) between shielding layer and the sinle silk, can cause the influence to the transmission signal, and distributed capacitance is arranged and is laid the influence by the cable sinle silk, can't carry out quantitative control, consequently can't the accurate measurement by survey the signal. The above problems are usually solved by debugging or calibrating the test equipment after the cable is laid. The mode makes equipment all need bring great maintenance work after using or changing for the first time, and measurement accuracy is subject to artifical debugging calibration effect, causes easily and thinks factor influence.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a signal long distance transmission's protection device aims at solving above-mentioned problem, eliminates long distance cable's parasitic capacitance and causes the interference to signal transmission, improves signal measurement accuracy and stability.
The utility model discloses mainly realize through following technical scheme:
a protection device for long-distance signal transmission comprises an acquisition circuit, a sensor and a driver, wherein a return signal line and an excitation signal line are arranged between the acquisition circuit and the sensor, and the driver is connected with the return signal line through a driving signal line; the electromagnetic shielding device is characterized in that an inner shielding layer and an outer shielding layer are arranged on the return signal line, the inner shielding layer is a single wire core shielding layer, the outer shielding layer is an electromagnetic shielding layer, and a driving signal which is completely consistent with a wire core signal of the return signal line is applied to the inner shielding layer of the return signal line.
In order to realize better the utility model discloses, furtherly, the internal shield layer of returning the signal line is single core shielded wire.
In order to better realize the utility model discloses, furtherly, outer shielding layer is for preventing the ripples cover, and single core shielded conductor establishment is in preventing the ripples cover.
In order to better realize the utility model, furthermore, the driving signal is output by the wire core return signal through the signal driver; the driving signal is transmitted to a source end of signal output through the equidistant long cable and is connected with the inner shielding layer.
In order to better realize the utility model discloses, furtherly, the outer shielding layer ground connection of return signal line.
The utility model has the advantages that:
(1) the utility model eliminates the influence of the cable distributed capacitance on the measuring signal, so that the testing equipment does not need to be debugged and calibrated for the second time, and the use and maintenance efficiency is improved;
(2) the utility model avoids the error caused by debugging and calibration, and improves the measurement precision;
(3) the utility model does not need to strictly control the distributed capacitance of the long cable, thus reducing the manufacturing difficulty and the inspection requirement of the cable; the transmission signal is not influenced by the distributed capacitance, the transmission distance of the signal is increased, and the practicability is better.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
Example 1:
a protection device for long-distance signal transmission comprises an acquisition circuit, a sensor and a driver, wherein a return signal line and an excitation signal line are arranged between the acquisition circuit and the sensor, and the driver is connected with the return signal line through a driving signal line; the electromagnetic shielding device is characterized in that an inner shielding layer and an outer shielding layer are arranged on the return signal line, the inner shielding layer is a single wire core shielding layer, the outer shielding layer is an electromagnetic shielding layer, and a driving signal which is completely consistent with a wire core signal of the return signal line is applied to the inner shielding layer of the return signal line.
The utility model discloses eliminated cable distribution electric capacity and to measuring signal's influence, made test equipment need not to carry out secondary debugging and calibration, improved and used and maintenance efficiency. The utility model does not need to strictly control the distributed capacitance of the long cable, thus reducing the manufacturing difficulty and the inspection requirement of the cable; the transmission signal is not influenced by the distributed capacitance, the transmission distance of the signal is increased, and the practicability is better.
Example 2:
the embodiment is optimized on the basis of embodiment 1, the inner shielding layer of the return signal line is a single-core shielding wire, the outer shielding layer is a wave-proof sleeve, and the single-core shielding wire is woven in the wave-proof sleeve.
Further, the driving signal is output from the wire core return signal through the signal driver; the driving signal is transmitted to a source end of signal output through the equidistant long cable and is connected with the inner shielding layer.
Further, the outer shielding layer of the return signal line is grounded.
As shown in fig. 1, a signal return line transmission cable is manufactured by using a double-layer shielding line, wherein an inner shielding layer is a single-core shielding layer and can be realized by using a single-core shielding wire. The outer shielding layer is the electromagnetic protection shielding layer of all cables, and the accessible is realized in the wave-proof cover with all single core shielded conductor weaves.
The driving signal which is completely consistent with the core signal is applied to the inner shielding layer for signal protection, and the outer shielding layer is grounded for shielding protection. The driving signal is output by the wire core return signal through the signal driver, in order to ensure the consistency of the driving signal and the return signal, an operational amplifier with proper parameters can be selected according to the signal current and the frequency characteristics, the signal is accessed to the equidirectional input end, the output end is connected between the operational amplifier reverse input ends, the output end signal is transmitted to the source end of the signal output through the equidistant long cable and is connected with the inner shielding layer.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
the utility model provides a signal long distance transmission's protection device, uses double-deck shielded wire to make signal return line transmission cable, and wherein the internal shield layer is single sinle silk shielding layer, uses single core shielded conductor to realize. The outer shielding layer is the electromagnetic protection shielding layer of all cables, and the accessible is realized in the wave-proof cover with all single core shielded conductor weaves. The driving signal which is completely consistent with the core signal is applied to the inner shielding layer for signal protection, and the outer shielding layer is grounded for shielding protection. The driving signal is output by the signal driver through the wire core return signal, is transmitted to the source end of the signal output through the equidistant long cable, and is connected with the inner shielding layer.
As shown in fig. 1, a signal return line transmission cable is manufactured by using a double-layer shielding line, wherein an inner shielding layer is a single-core shielding layer and can be realized by using a single-core shielding wire. The outer shielding layer is the electromagnetic protection shielding layer of all cables, and the accessible is realized in the wave-proof cover with all single core shielded conductor weaves.
The driving signal which is completely consistent with the core signal is applied to the inner shielding layer for signal protection, and the outer shielding layer is grounded for shielding protection. The driving signal is output by the wire core return signal through the signal driver, in order to ensure the consistency of the driving signal and the return signal, an operational amplifier with proper parameters can be selected according to the signal current and the frequency characteristics, the signal is accessed to the equidirectional input end, the output end is connected between the operational amplifier reverse input ends, the output end signal is transmitted to the source end of the signal output through the equidistant long cable and is connected with the inner shielding layer.
The utility model discloses eliminated cable distribution electric capacity and to measuring signal's influence, made test equipment need not to carry out secondary debugging and calibration, improved and used and maintenance efficiency. The utility model does not need to strictly control the distributed capacitance of the long cable, thus reducing the manufacturing difficulty and the inspection requirement of the cable; the transmission signal is not influenced by the distributed capacitance, the transmission distance of the signal is increased, and the practicability is better.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (4)
1. A protection device for long-distance signal transmission is characterized by comprising an acquisition circuit, a sensor and a driver, wherein a return signal line and an excitation signal line are arranged between the acquisition circuit and the sensor, and the driver is connected with the return signal line through a driving signal line; the electromagnetic shielding device is characterized in that an inner shielding layer and an outer shielding layer are arranged on the return signal line, the inner shielding layer is a single wire core shielding layer, the outer shielding layer is an electromagnetic shielding layer, and a driving signal which is completely consistent with a wire core signal of the return signal line is applied to the inner shielding layer of the return signal line.
2. The protection device for long-distance signal transmission according to claim 1, wherein the inner shielding layer of the return signal line is a single-core shielding wire.
3. The device for protecting the long-distance transmission of signals according to claim 2, wherein the outer shielding layer is a wave-proof sleeve, and the single-core shielding wire is woven in the wave-proof sleeve.
4. The device of claim 1, wherein the outer shield of the return signal line is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023236267.0U CN214755501U (en) | 2020-12-29 | 2020-12-29 | Protection device for long-distance signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023236267.0U CN214755501U (en) | 2020-12-29 | 2020-12-29 | Protection device for long-distance signal transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214755501U true CN214755501U (en) | 2021-11-16 |
Family
ID=78634934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023236267.0U Active CN214755501U (en) | 2020-12-29 | 2020-12-29 | Protection device for long-distance signal transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214755501U (en) |
-
2020
- 2020-12-29 CN CN202023236267.0U patent/CN214755501U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105372483B (en) | A kind of radio-frequency voltage current sensing means | |
| US10067165B2 (en) | Isolated differential voltage probe for EMI noise source | |
| EP3499253A1 (en) | Marine cable section and method for identifying a partial electrical discharge in a marine cable section | |
| CN101533049A (en) | Current radiation transmitting device for measuring cable | |
| CN109752606A (en) | A kind of three coaxial test macros of radio frequency (RF) coaxial connector | |
| CN214755501U (en) | Protection device for long-distance signal transmission | |
| CN205246741U (en) | Small electric current signal measurement device of high potential pulse | |
| CN101285852B (en) | Alternating current voltage electric current converter and device and method for testing alternating-current small ammeter | |
| CN105954697A (en) | Wide band precision calibration method and device of pulse current sensor | |
| US11325720B2 (en) | Electric power and data communications within a fuel tank and across a wall of the fuel tank using resistive non-metallic wire | |
| Smith | Current probes, more useful than you think | |
| CN110320402B (en) | Device and method for measuring transient overvoltage of primary side of capacitive voltage transformer | |
| CN102062848A (en) | Calibrating device of output voltage of insulating oil dielectric strength tester | |
| CN114696871A (en) | Protection method for long-distance signal transmission | |
| CN111781428A (en) | Wireless sensing capacitive equipment dielectric loss live-line testing device | |
| CN106507951B (en) | Shared test equipment is for the anti-interference method of AC servo control system | |
| CN210835116U (en) | Performance test system of power filter under simulated actual working state | |
| CN113721060A (en) | Shielding voltage divider | |
| CN106569156A (en) | Substation switching operation transient measurement probe and high-frequency measurement method | |
| GB2608210A (en) | Instrument interface method and device | |
| CN110531170A (en) | Shielded cable shielding attenuation measurement method | |
| CN101271128B (en) | Digital display signal measurement amplifying circuit | |
| CN105021870A (en) | Measurement method for induced voltage of cable terminal | |
| CN114264851B (en) | Electromagnetic shielding attenuation measurement method for shielded cable | |
| CN219935963U (en) | Voltage and current measurement channel of digital bridge and digital bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |