Chinese name: Pulse mbth: Pulse number per second Traditional: pulseㄇㄞˋㄔㄨㄙ Pinyin:? MàI chūng abbreviation: PPS main features: waveform definition, amplitude, width, repetition frequency, related terms, nerve impulses, pulse signal, electromagnetic pulse, pulse reactor, pulse power supply, pulse width, pulse circuit, pulse dialing, pulse heating and pulse wave. Literally, the definition refers to the shock wave produced by pulse beating. The definition of pulse is actually like this: the waveform of voltage (V) or current (A) is like the waveform of pulse beating on ECG. But what is the explanation of power pulse and sound pulse? The original meaning extension of pulse: mechanical forms such as waves emitted at the same time interval. Academically, pulse is defined as the process of physical quantity change that suddenly changes in a short time and then quickly returns to the initial value, which is called pulse. From the definition of pulse, we can easily see that pulse has the characteristics of interval, so we can take pulse as a signal. The definition of pulse signal comes from this: compared with continuous signal (signal that exists for a short time in the whole signal period), there is no signal in most pulse signal periods. Just like a person's pulse. Pulse signal is generally an exponential signal, which has been a signal for half the time (or even longer) in a cycle. The signal in the computer is a pulse signal, also known as a digital signal. In addition, pulses are also used to express emotional impulses and demands. For example, only competition can make the society develop more perfectly and harmoniously, but many middle school students have no such signal and pulse. ("China Youth Daily" 1988 April19) Related terms nerve impulse nerve impulse, to be exact, it should be called nerve im-pulse. When a certain part of the nerve is subjected to * * * with sufficient intensity, an action potential is generated in that part and propagates in two directions along the nerve fiber from this point. Impulse and action potential have the same meaning, but impulse is used as a signal propagating along the axon. According to the main position of impulse, it is an organ that acts from the center to the periphery in centrifugal nerve and conducts from the peripheral receptor to the center in centripetal nerve. Its function is to connect the central and peripheral signals. The transmission speed of impulse can vary with the thickness of myelin sheath and nerve fiber. The conduction velocity of myelinated nerve is proportional to the fiber diameter. In mammals, it is expressed by fiber diameter (micron) × 6m/s, and the highest value is120m/s. The conduction velocity of unmyelinated nerve is directly proportional to the square root of the diameter, usually below 2-3m/s. The voltage or current whose pulse signal suddenly changes and the action time is extremely short is called pulse signal. It can be repeated periodically, irregularly or once. Pulse signal is a kind of discrete signal with different shapes. Compared with ordinary analog signals (such as sine waves), the waveforms are discontinuous on the time axis (there are obvious intervals between waveforms) but have certain periodicity. The most common pulse wave is a rectangular wave (square wave). Pulse signal can be used to represent information, also can be used as carrier wave, such as pulse code modulation (PCM), pulse width modulation (PWM), etc., and can also be used as clock signal for various digital circuits and high-performance chips. The so-called pulse signal is a curve with countless breakpoints in plane coordinates, that is to say, in some periodic places, the limit of the point does not exist, such as sawtooth wave, and there are also digital circuit signals for computers, 0, 1. Pulse signals, that is, signals similar to pulse jumps, are compared with DC and intermittent signals. If described by water flow, direct current means that the faucet keeps dripping, and pulse means that the faucet keeps opening and closing to form water pulse. When you turn on the flashlight, the light comes on. This is DC. If the lights are turned on and off all the time, a pulse is formed, and the switching speed is the pulse frequency. Electromagnetic pulse Electromagnetic pulse (EMP) is a powerful energy field generated instantly. It is very sensitive to energy waves and can destroy countless power systems and high-tech microcircuits in the distance. The explosion of nuclear weapons in the upper atmosphere can produce a huge electromagnetic pulse effect, which is the phenomenon of high-altitude electromagnetic pulse (HEMP). Pulse reactor can reach supercritical state in a short time interval, thus generating high pulse power and strong neutron flux, and can be operated repeatedly safely and reliably. It is divided into thermal neutron pulse reactor and fast neutron pulse reactor. China has built a uranium zirconium hydride pulse reactor, which uses uranium zirconium hydride as fuel. It mainly uses hydrogen as moderator. With the increase of power and temperature, the moderating effect of hydrogen is weakened and the reactivity is immediately reduced. The reactor has a large instantaneous negative temperature coefficient, so it runs in pulse mode. Pulse reactors can be used for training personnel, conducting research and producing short-lived radioisotopes, as well as treating cancer, neutron radiography, activation analysis and irradiating fuels and materials. The load of pulse power users needs to be powered on intermittently, that is, according to a certain time law, the load is powered on for a certain time, and then powered off for a certain time, and it is turned on and off once, forming a cycle. This repeated execution constitutes a pulse power supply. For example, in the aging process of non-polar electrolytic capacitors, it is necessary to charge the capacitor in the forward direction for a period of time, then discharge it, then charge the capacitor in the reverse direction for a period of time, and then discharge it, thus forming the forward direction → discharge (power off) → reverse direction → discharge → forward direction, and so on. 1, single pulse power supply
Monopulse power supply generally outputs unidirectional pulse current with fixed parameters. If you want to change the pulse parameters, you need to reset them after stopping. 2. Double pulse power supply.
Double pulse power supply generally outputs periodic commutation pulse current with fixed parameters. If the pulse parameters are to be changed, it is necessary to reset the anode dissolution of the reverse pulse of the dual-pulse power supply after shutdown, so that the metal ion concentration on the cathode surface rises rapidly, which is beneficial to the subsequent cathode recycling with high pulse current density, so the coating is compact, bright and low in porosity. Anode stripping with reverse pulse of double pulse power supply greatly reduces the adhesion of organic impurities (including brightener) in the coating, so the coating has high purity and strong anti-discoloration ability. YS-9000 wing-lift intelligent pulse electroplating power supply provides a powerful means for the development and production of nano-electroplating technology. The specification parameter is 1, and the output waveform is square wave pulse or DC.
2. Pulse frequency:1-100 Hz1000 Hz 200-2000 Hz 500-5000 Hz10 khz-30 khz (optional and customizable).
3. Pulse duty ratio: 0 ~ 100%
4. Commutation time of forward and backward pulses: 0 ~ nine thousand nine hundred and ninety-nine MS 5, output voltage: 0- 100V 6, and maximum average output current: 0-5000 A.
7. Maximum peak current: 15000A pulse width is high level duration. It is usually used as a sampling signal or trigger signal for components such as thyristors. Pulse circuit is a circuit that generates, shapes and transforms pulse waveform. The pulse circuit consists of two parts: an inert circuit and a switch. The function of the switch is to destroy the steady state and make the circuit transient. Pulse dialing is a time domain processing method, which uses the number of pulses to represent numbers. Pulse dialing mode has strict requirements on pulse width, size, spacing and shape. If these parameters are changed due to line interference or other reasons, it may lead to wrong number reception. On the other hand, because each pulse takes up a certain time (generally, the time taken up by each pulse is 100ms), this dialing method is slow. Pulse heating is intermittent heating with various waveforms of pulse current to meet some special technological requirements. Pulse wave is a signal waveform generated in the form of impact.