The emergency vehicle is a special rescue and emergency rescue vehicle used to deal with emergencies. The vehicle must be dispatched when it is used, so as to ensure the efficiency of emergency rescue. How should the emergency vehicle dispatch plan be developed? Take a look at the specific introduction.
First, the usual maintenance plan for vehicles. Emergency vehicles are used only when emergencies occur, but maintenance should be done in peacetime. As the so-called constant use of troops for a thousand days, only the maintenance work of vehicles can be ensured to be used normally in an emergency. This is an indispensable part of vehicle scheduling programs. The maintenance of emergency vehicles should be targeted according to the purpose of the vehicles, such as medical ambulances, fire-fighting vehicles, etc. Their use is different. The issues they care about may also differ, and professional maintenance of professional vehicles should be done. jobs.
Second, the development of the vehicle's driving route. Emergency vehicle scheduling program with particular attention to the vehicle travel route planning, emergency vehicles through which place should have an emergency lane as much as possible, which can greatly increase the speed of the rescue. If you take the ordinary lane, it may cause delays due to traffic jams or other problems. When scheduling vehicles, the convenience of the driving route should be fully considered so that rescue operations can be done well. In general, the road sections that should avoid traffic congestion can be selected as urban expressways, or outer loops, or where there are multiple roads in parallel, and appropriate arrangements should be made according to the conditions of the urban roads.
Third, the response to vehicle failures. In the process of dispatching the vehicle, we must also be prepared to deal with vehicle failures, such as preparing spare vehicles, quick repairs for emergency vehicles in general, or using other alternative methods. Under normal circumstances, the emergency vehicle rarely fails, but if there is a major danger, it is likely to cause failure of the use of the vehicle. These contents should be taken into consideration in the vehicle dispatching plan so as to effectively ensure that the emergency car can play a greater role.
Impedance control has been one of the essential concerns and tough problems in high-speed PCB design. Impedance is the sum of the resistance and reactance of an electrical circuit. The resistance being the opposition to current flow present in all materials. In high frequency applications, controlled impedance helps us ensure that signals are not degraded as they route around a PCB. Resistance and reactance of an electrical circuit have a major impact on functionality, as certain processes must be completed before others to ensure proper operation.
Because of complex processors, USB devices and antennas are printed directly on the circuit board surface. The speed of signal switching on the circuit board increases, and the electrical characteristics of the tracks that transmit signals between devices become more and more important. Therefore, more and more PCB designs need impedance control and testing.
Impedance control technologies are quite important in high-speed digital circuit design in which effective methods must be adopted to ensure the excellent performance of high-speed PCB. The impedance of a PCB is largely determined by some factors, such as trace width, copper thickness, dielectric thickness, dielectric constant. Impedance, generally measured in Ohms. We must control the resistance and reactance of an electrical circuit to ensure the quality of signal in the complex design. For example single-ended impedance 50 ohm ±10%, differential impedance 100ohm ±10%.
Electrical Impedance: A measure of opposition to time-varying electric current in an electric circuit.
The Problem: "A", "B" and "C" signals all reach the component at the same time.
The Solution: Apply Impedance to Circuit "C" to slow the signal enough for the component to first calculate ("A"+B").
Similar with a cable, the signal encounters a change of impedance arising from a change in material or geometry. Part of the signal will be reflected and part transmitted. These reflections are likely to cause aberrations on the signal which may degrade circuit performance (e.g. low gain, noise and random errors). In practice, board designers will specify impedance values and tolerances for board traces and rely on the PCB manufacturer to conform to the specification.
When rise times continue to reduce, inevitability the number of traces requiring impedance control will continue to increase. Where impedance control is needed it is important to control it accurately, calculating it with the most representative cross-section we can create.
Impedance Control PCB is too complicated? No worry! JHYPCB engineers can help you at any time as we have three shifts. Free stack-up and impedance calculations can be offered upon request. We will work with your engineering team at the conceptual level of the PCB design to assist you to get better results in controlling impedance by choosing the suitable laminate and layer stack up.
Why Impedance Control PCB can be shipped timely all the time? As common materials are stored well in JHY PCB warehouse regularly. We have heavy copper thickness, 2oz, 3oz or more. Odd copper thickness H/1 oz, H/2 oz, 1/2 oz. Foil: 1/4 oz, H oz, 1 oz, 2 oz, 3 oz.
If you need order Impedance Control PCB, just make notes in Readme file, and send it together with Gerber, our engineer will take care of it. Have a try!
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