1, cable fault tester is a comprehensiveCompliant cable fault tester. It can detect cable faults through a number of detection methods. Can solve the problem of stroboscopic and short circuit, can solve the problem of cable line. It is also possible to test the relevant cable path, the buried depth of the cable, measure the speed by radio waves, and then check the cable length. A recorded cable file can also be established to facilitate the normal maintenance and management of the machine in the future.
2, cable fault tester is a special instrument used to detect cable faults, mainly used to locate the fault point in the cable. It does this by sending a specific signal into the cable and then judging it based on the received signalThe location of the barrier point. Cable fault testers can often be used to test various types of cables, including power cables, communication cables, etc.
3, cable fault tester is a comprehensive set of equipment. Used for power cable open circuit, short circuit, ground, low resistance, high resistance flashover and high resistance leakage fault test, as well as coaxial communication cable and local cable open circuit, short circuit fault test. It can also test cable path, buried depth, as well as radio wave velocity measurement, check cable length, etc., and can establish cable files for daily maintenance management.
is feasible, and now there are countries, like Germany already have this technology, but the power is limited, with the passage of time, will achieve, of course, there will be bottlenecks in the development process. Talk about it again, we call radio waves weak electricity, and the general power is strong electricity, and the strength itselfIt is also relative, with no clear boundaries.
Radio energy transmission, the cornerstone of this innovative technology originated from the invention of Nicholas Tesla's induction coil (transformer) in 1836, which cleverly realized non-contact magnetic energy transmission, opening up new possibilities for power transmission. The ideal transformer coupling coefficient is close to 1, but in practical applications, due to the limitation of coil spacing, high-frequency and resonant circuits are widely used to improve efficiency, such as the 60W transmission experiment at MIT in 2007.
My research direction happens to be superconducting power, and the group is also doing wireless power transmission.I agree with some respondents that the two issues are not at the same level. Talking about superconductivity technology first, superconductivity involves more things, and the basic research of superconductivity is still a hot direction in physics, which can be seen from the number of Nobel prizes and nature and science articles in the past 30 or 40 years.
No direct current, direct current can not form an alternating magnetic field, the opposite collar can not sense the voltage. After receiving the electric part can be rectified out of the DC.
If it's power transmission in the form of radio waves, there have to be many aspects. First of all, since it isid=' What are the steps to use a wireless high voltage nuclear phase meter? '> What are the steps for using a wireless high voltage nuclear phase meter?
⑤ When measuring ≥10KV, X and Y can be placed directly on the wire or insulation at the same time for nuclear phase. When the nuclear phase is ≥66KV, X and Y collectors can take contact or non-contact methods of nuclear phase. For example, when measuring 110KV and 220KV, place the X and Y acquisition heads 300mm to 1000mm below the high voltage wire.
When using a wireless high voltage nuclear phase meter, first ensure that the device is properly connected. When in contact with a live wire,An audible signal will be heard, accompanied by four indicator lights. After about 5-10 seconds, LED2-4 will go off and the acoustic signal will stop. At this point, the transmitter will automatically enter voltage measurement mode, and only one LED indicator will continue to light. If the signal continues after 5-10 seconds, it indicates that the battery is low and a new battery needs to be replaced.
Wireless high voltage nuclear phase meter Usage Install the meter head vertically on the tripod. Make the indicator close to or equal to zero, connect the connecting wire to the test rod and the instrument according to the same color, and ground the grounding wire to ensure that the wiring is correct and good. Connect the two poles to their respective sidesThe line.
operation, the instrument transmits the digital signal to the receiving end through the wireless transmission module, which cleverly avoids external interference and reduces the error. When used, the receiver is first aligned with the measured power grid conductor and then aligned with the other side, and the wireless nuclear phaser will clearly issue a voice prompt of "same phase" or "Attention, different phase" to help the user make a quick judgment.
To measure another phase line, remove the transmitter from the line until LED1 is off and then place the transmitter on the line for another voltage measurement. Ibid. The transmitter emits a radio frequency signal into the air when it enters measurement modeAt the same time, a part of the signal is transmitted along a line that acts as an antenna and once the receiver can recognize the signal, the receiver starts working immediately.
The self-calibrating plug can be reversed, then pulled out and reinserted. Low-voltage core wire: When the conductor voltage is lower than 100V, the auxiliary test wire can be used to insert the round hole end into the charging hole of the sub-machine, and the EFI clamp end is grounded; The auxiliary test line should not be used for lead voltages above 220 V. Wireless high voltage nuclear phaser for nuclear phase, use method is very simple. And after the power worker reads the product manual, it can be operated.
Radio telemetry is the measurement of distant objects. Get the data you need. Such as radio telemetry automatic weather station, located on a mountain, do not need people directly in the mountain weather station operation, you can know the required information, such as atmospheric pressure, atmospheric temperature, atmospheric relative humidity, average wind speed, rainfall and so on.
Radio refers to electromagnetic waves propagating in free space (including air and vacuum) with a frequency below 300GHz (the lower limit frequency is less uniform, in various RF specifications, there are three common3KHz~300GHz, 9KHz~300GHz, 10KHz~300GHz). Radio technology is the technology of transmitting signals through radio waves. The principle of radio technology is that changes in the strength of an electric current in a conductor produce radio waves.
Learn basic concepts: Understand the basic principles of radio, such as electromagnetic waves, frequencies, wavelengths, modulation and demodulation. These concepts are fundamental to understanding radio technology. Learn circuit principles: familiar with common electronic components, such as resistors, capacitors, inductors, diodes, transistors, etc., and learn to analyze simple circuit diagrams. In additionIt is also necessary to understand basic circuit analysis methods, such as Ohm's law, Kirchhoff's law, etc.
The voltage or current that changes suddenly and acts for a very short time is called pulse current. It can be repeated periodically or aperiodically. "Pulse" contains the meaning of pulsation and brevity. In the pulse technique, the voltage or current of some discontinuous action is studied, whose duration is very short, and the time interval between the two actions is relatively long.
PulseCurrent: Current whose direction is constant and whose intensity changes periodically with time. So the DC square wave current is a pulse current, while the AC square wave current is not.
Pulse current refers to the current whose direction is unchanged and strength changes periodically with time, also known as pulsating current. The pulse power supply has single positive pulse and double positive and negative pulse power supply, which adopts unique modulation technology and digital control. The positive pulse opening width (T) and negative pulse opening time width (T-) can be adjusted respectively during the whole cycle. Positive current, voltage regulation, negative current, voltage can be adjusted independently.
Pulse current means constant direction,The current whose intensity changes periodically with time is also called pulsating current. Some users need to intermittently power up the load, that is, according to a certain time law, power up the load for a certain time, and then power off for a certain time, and form a cycle. This repeated execution constitutes a pulse power supply.
Pulse current is a current or voltage pulse that repeats periodically. Pulse current is also called pulsating current, which refers to the current with constant direction and changing intensity. Strictly speaking, the current output by the DC generator is the pulsating current. But the degree of change in the strength of the current is small. Pulse current can also be saidA current in which a unidirectional (cathode) current is periodically interrupted by a series of open circuits (through which no current passes).
The receiver frequency must be consistent with the frequency of the signal in order to receive the signal.
Use a directional antenna with strong directivity and a selective receiving device. After scanning the target signal, judge the signal orientation by comparing the signal strength in each direction. If the signal is too strong, it is necessary to add a damping device at the receiving end to control the input signal strength. I hope my answer can help you.
Good antenna, the frequency is consistent, the transmitting end power is large, the receiving end amplifier circuit is good.
You must have a directional antenna with a lobe Angle of 15°. People who have a good knowledge of electromagnetic field theory and microwave technology can design it. Check with a store that sells radio direction-finding sports equipment to see if you can get one ready made.