To ensure the stability of the power supply testing system for electric tools,the digital data collection,control devices,and methods are mainly reflected.The online monitoring system for transmission lines can be said to be a microcosm of the intelligent development of high-voltage transmission lines in today's era.The system includes seven subsystems:transmission line video monitoring system,transmission line micro meteorological online monitoring system,transmission line icing online monitoring system,transmission line wire temperature online monitoring system,transmission line tower tilt online monitoring system,transmission line wire wind deviation online monitoring system,transmission line insulator leakage current online monitoring system,etc.It can monitor various states of high-voltage transmission and transformation lines for users to set no-load,load,or locked rotor.
　　Can perform manual loading tests and flexibly adjust the load.The time for each stage can be set to 0-6553.6 seconds(which needs to be set through durability software).Users can flexibly set the external or internal cycle,and flexibly set the operation mode(counting or timing)to meet different durability test cycle beats,ensuring the safe and reliable operation of the power grid.At the same time,effective management of transmission lines can also be achieved through remote monitoring.
　　When we short circuit the oscilloscope probe to the ground wire(crocodile clip)and try to place the power tool probe close to the circuit board,we can detect spatial noise from the oscilloscope.We generally tend to believe that this is because the crocodile clip ground wire of the probe forms an"antenna"that receives radiation from space.Especially if there is a DC/DC circuit on the board,we will bite the probe closer to the DC/DC chip,and we will be able to obtain a particularly clear waveform.Undoubtedly,this is the spatial noise of DC/DC,which can even reach 60mVpp(when the"antenna"is very close to the DC/DC)on the power supply testing system we tested.