Design Of Synchronous Device For Electromagnetic Instrument Based On Rubidium Atomic Clocks

With the development of the society, upgrading of electromagnetic instrument ismore and more frequent, the application of electromagnetic instrument synchronousdevice also puts forward new requirements.In the past, Electromagnetic instrumentapplied for measuring the surface. now it works in the mine,unnel and undergroundengineering, measuring environment increasingly complex. The key to the acquisitiondata is the Synchronized methods into electromagnetic instruments improve workefficiency and stability. How to improve the precision of the electromagneticinstrument clock synchronization, and to adapt to the bad weather change andcomplex terrain environment, is the key to improve the electromagnetic instrument.Through access to domestic and foreign data of electromagnetic instrumentsynchronization device，the main synchronization methods of the electromagneticmethod instrument synchronization device are: line synchronization, GPSsynchronization, quartz crystal synchronization mode, In the field of detection willhave more or less problems.On cable synchronization are affected by geographical environment, It isextremely inconvenient,when electromagnetic instrument working distance is far,The GPS synchronization is influenced by the change of weather, geographicallocation and other factors greatly; The shortcoming of quartz clock synchronizationmethod is quartz crystal with the increase of time, the crystal will appear agingproblem and needs to be measured under the condition of constant temperature, whenthe long time detection, errors should be corrected,another disadvantage is warmed upfor a long time, It is affect work efficiency. To solve above disadvantages, It isproposed the design principle of electromagnetic instrument based on rubidiumatomic clock synchronization device and gives the specific design scheme. Electromagnetic instrument synchronous device can be applied to send andreceive electromagnetic method of separation of instruments or distributed on thereceiver,it has high synchronization precision, not only inaffected by terrain, weather,and the environment, but also can effectively enhances the working efficiency of theinstrument. To improve the way of other synchronization, in this paper, it is proposedthe design of design of synchronous device for electromagnetic instrument based onrubidium atomic clocksBased on the domestic and foreign research status and development trend of thesynchronous device, puts forward the design scheme of the device and theperformance of synchronization. The synchronous device mainly consists of referencesystem and calibration system, the clock with the optocoupler isolation, werecomposed of MCU and CPLD architecture, in addition, the external circuit designreference system also includes the frequency selection module, reset module, theinitial trigger signal adjustment and detection module. Synchronous device designmultiple frequency synchronization output signal in order to adapt to the needs of allkinds of electromagnetic instrument to detect.In this paper, the electromagnetic instrument Synchronous device is tested andevaluation, including synchronization device performance test, switchable frequencysignal output test, the accumulated error analysis of electromagnetic instrumentsynchronous device.Synchronous device is affected by temperature and vibration ofexternal influence the stability of the synchronous signal output. Synchronous devicefield minimum school cycle was calculated and evaluated the synchronizer in theory,the error precision of school in shortest time.Synchronization precision can reach500ns, to ensure the accuracy of synchronizer school minimum phase cycle for twohours.