A Low Distortion Omnidirectional Geophone
A geophone and low-distortion technology, applied in seismic signal receivers, seismology, instruments, etc., can solve the problem of high harmonic distortion of omnidirectional geophones, achieve harmonic distortion reduction, distortion improvement, and detection effect best results
Active Publication Date: 2018-02-02
MIANYUAN TECH SHENZHEN CO LTD
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Problems solved by technology
[0019] In order to solve the problem of high harmonic distortion of omnidirectional geophones in the above background, the present invention provides a low-distortion omnidirectional geophone
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[0039] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.
[0040] The present invention provides a low-distortion omnidirectional geophone, which includes an upper wire frame 312, an upper coil 313, a lower wire frame 320, a lower coil 318, a weight adjustment coil 317, a magnet 316, an insulating sheet 309, an upper pole piece 314, a lower Pole shoe 319, upper spring piece 310, lower spring piece 323, upper snap ring 302, lower snap ring 325, upper top cover 301, lower top cover 321, shell 326, spring washer 308, terminal post 304, terminal post 305, Upper inner contact reed 303, upper outer contact reed 307;
[0041] The two terminal posts 304 and 305 are respectively 2 electrodes of the electric signal output of the omnidirectional geophone; the circuit loop of the electric signal is that the terminal post 304 is soldered to the upper inner contact reed 303; the upper inner contact reed 303 is conn...
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The invention relates to a low distortion omnidirectional seismometer which comprises a casing, an upper top cover, a lower top cover, an inertia block system and a magnetic system. The inertia block system comprises an upper coil, a lower coil and an adjustable coil. The magnetic system comprises a magnet, an upper pole shoe, a lower pole shoe and a compensation ring. The end face of the upper pole shoe is marked as an end face A, the end face of the lower pole shoe far away from the magnet is marked as an end face B, the end face of the upper coil far away from the magnet is marked as an end face C, the end face of the lower coil far away from the magnet is marked as an end face D, and the end face C and the end face D are located between the end face A and the end face B. The seismometer is scaled up or down; when the distance HAB between the end face A and the end face B is standardized to be equal to 25.4 mm, the distance between the end face C and the end face A and the distance between the end face D and the end face B meet the equations that 0.6 mm<=SCA=SDB<=3mm. According to the low distortion omnidirectional seismometer, by limiting the distance between the coil end face and the pole shoe end face, the distortion of the seismometer is greatly improved, and the influence on sensitivity is extremely small.
Description
technical field [0001] The invention relates to a geophone, in particular to an internal magnetic induction omnidirectional geophone used for complex ground conditions (such as underground, ocean, etc., which are difficult to be buried correctly) exploration, seismic survey and engineering survey. Background technique [0002] With the extension of geophysical exploration to the deep sea, deep strata and complex terrain, in order to solve the problem of embedding and complex coupling, omnidirectional geophones with various specifications and types have appeared in the industry. But the ensuing problem is that the existing omnidirectional geophones cannot provide higher exploration resolution, and the original promising omnidirectional technology has been greatly restricted in application: the existing technology cannot A breakthrough has been made in the distortion of the geophone, and its harmonic distortion is in the range of ≤0.6% to 0.9% (17.8mm / s excitation), which make...
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IPC IPC(8): G01V1/18
CPCG01V1/181
Inventor 王书克夏亚舟贺蕾林月梅冯京川冯克军
Owner MIANYUAN TECH SHENZHEN CO LTD