Automated Burris gravity meter for single and continuous observation

作     者：Gerhard Jentzsch Richard Schulz Adelheid Weise 

作者机构：Gravity Consult GmbH^1Bonn(formerly Institute of GeosciencesApplied GeophysicsFriedrich-Schiller-University Jena)Annettenstr.2D-53175BonnGermany Applied Gravity Dr.H.Richard SchulzSteg 8D-74538RosengartenGermany Institute of GeosciencesGeneral GeophysicsFriedrich-Schiller-University JenaBurooweg 11D-07749JenaGermany 

出 版 物：《Geodesy and Geodynamics》 (大地测量与地球动力学（英文版）)

年 卷 期：2018年第9卷第3期

页      面：204-209页

学科分类：07[理学] 0707[理学-海洋科学] 08[工学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 

主　　题：Gravimeter Micro-gravity measurements Drift Resolution Single and continuous observations 

摘      要：The Burris Gravity MeterTM manufactured by ZLS Corporation, Austin/Texas, USA, is based on the in- vention of L^R （L. LaCoste and A. Romberg）： The ZLS （zero-length spring）. A digital feedback system （range of about 50 mGal） is used to null the beam. Now, more than 120 gravity meters of this make exist worldwide and are used successfully in exploration, volcanology, geodetic work and surveying. The sensor is made of the well-known （L＆R） metal-alloy zero-length spring providing a low drift characteristic. The drifts observed are comparable to L＆R gravimeters and are less than 0.3 mGal per month, which is much lower than the drifts known for the fused quartz sensors. The dial is calibrated every 50 regal over the entire 7000 mGal meter range. Since the gravity value is determined at these points, there are no periodic errors. By a fourth heater circuit temperature effects are totally avoided. The gravity meter is controlled via Bluetoothce either to a handheld computer （tablet） or a notebook computer. The feedback responds with high stability and accuracy. The hulling of the beam is controlled by the UltraGravTM control system which incorporates an inherently linear PWM （pulse-width modulated） electrostatic feedback system. In order to improve the handling of the gravimeter we have developed two Windows based programs： AGESfield for single measurements and AGEScont for continuous readings.