Research And Design Of Electric Sparker Based On Lithium Battery Power Supply

Sparker are often used for field oil and gas exploration and large distance formation ct.Traditional sparker are bulky and bulky,and rely heavily on utility or generator power supply,which brings inconvenience to actual production and construction.In order to solve the problem of power supply and weight of sparker and improve the production efficiency of sparker,this paper studies and designs a portable sparker based on lithium battery.Compared with the traditional mains-powered sparker,this design solves the problem of difficulty in charging the sparker during complex mountain exploration.Firstly,this paper studies the working mode of capacitor charging,and mainly studies three kinds of working characteristics of series resonance,parallel resonance and series-parallel resonance.The power supply for the sparker developed in this paper adopts series-parallel mode.By adjusting the parallel compensation capacitor in the circuit,the output current of the lithium ion battery is optimized,the lithium ion battery obtains the best output characteristics,and the volume of the power supply is optimized,which meets the requirements of portability,and the power supply mode of the lithium ion charging power source.The use scene of the sparker has been expanded.Secondly,the designed Sparker pulse capacitance is 200 ?F,the charging voltage is up to 10 kV,the charging time is 25 s,the discharge switch conduction delay is less than 0.1ms,the discharge energy is up to 10 kJ,and 100 times of discharge can be completed under 10 kJ excitation.Breaking through the problem of ins?Fficient energy of traditional sparker.The time difference between the output sync signal and the first pulse pressure wave is less than 1 ms,and the seismic wave energy generated by the sparker is at a frequency of 100-1000 Hz,which is mainly used for shallow exploration.The seismic wave exploration depth is about 100 m,and the depth varies according to different geological conditions.The traditional sparker requires at least two workers to operate.In areas where no mains supply is provided,additional generator power supply is required,and construction efficiency is low.The sparker designed in this paper is powered by a lithium-ion battery.The volume and weight are greatly reduced compared to the conventional source,and only one worker can operate.Because lithium battery charging power is the key to this design,this paper focuses on the charging power module.The SG3525 control chip is used to protect the external circuit multiple times,cancel the mechanical switch of the traditional sparker and the threeelectrode spark switch,and replace it with the IGBT switch,the delay is lower,and the energy loss during the discharge process is reduced.The traditional sparker determines the excitation signal of the source through the acoustic signal and current change,and the received signal has a high delay.In this design,the discharge cable and the discharge electrode are redesigned.The glass fiber is added into the discharge electrode steel tube,and the light signal generated by the discharge of the discharge electrode is used to determine the earthquake excitation time.The signal reception and the earthquake excitation time are basically no delay,and the operation is simple and easy.When the pulse capacitor is discharged,the large current of the device circuit causes large inductance interference,and it is basically impossible to directly measure the seismic wave signal near the discharge electrode.The use of fiber output reduces the current and inductance interference,and can achieve a zero-delay starting seismograph to improve the accuracy of the data.Through preliminary experiments,it was found that the Sparker prototype can basically be used for experiments.At present,the prototype does not meet the construction requirements.The lithium-ion battery charging power supply basically replaces the traditional mains and generator power supply,which is an important step in portability.The designed sparker wavelet has good consistency and wide spectrum.In the next work,we began to reduce the volume of the capacitor box,increase the discharge voltage of the lithium battery,and increase the stability of the circuit.The equipment can be used for actual production after improvement.