CN101738633A

CN101738633A - High-accuracy deep-well six-dimensional seismograph

Info

Publication number: CN101738633A
Application number: CN200910265239A
Authority: CN
Inventors: 陈�峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-18
Filing date: 2009-12-18
Publication date: 2010-06-16

Abstract

The invention relates to a micro-vibration sensor which is mainly used for carrying out early warning on natural earthquake, sensing the earthquake magnitude and carrying out high-accuracy sensing, test analysis and scientific research on micro-momentum generated by the autorotation of the earth. Meanwhile, three quartz flexible servo circuit accelerometers are adopted, the direction of a sensing moment axis of each accelerometer is installed to form an included angle of 90 degrees mutually, the direction of the sensing moment axis of each accelerometer takes null output as a reference point, two null reference points of a horizontal direction are ensured by a three-point ruthenium encircling line adjustment method, the null in the direction of a gravitational field adopts a null balance control circuit, all the accelerometers output a positive-vector voltage pulse signal and a negative-vector voltage pulse signal, and a positive-vector voltage pulse value and a negative-vector voltage pulse value represent the vibration direction and the vibration amplitude respectively. In this way, the three accelerometers construct a six-dimensional sensing system, and the maximum dynamic range is 240dB. When the temperature of the use environment is changed within a range of -40-55 DEG C, the effective dynamic range is not less than 160dB, the accuracy is not greater than +/-0.01%, and the widest frequency response range is 0-2500Hz.

Description

High-accuracy deep-well six-dimensional seismograph

Technical field:

The present invention relates to vibrative sensor, mainly is to the early warning of earthquake and the sensing of earthquake magnitude, and the fine motion amount that earth rotation produced is carried out high-precision sensing, test analysis and scientific research.

Background technology:

What be used at present that earthquake makes sensing is three-component seismometer, and the ambient temperature range of use is little, and the sensing Hz-KHz is narrow, and sensing accuracy is on the low side relatively, can only be as the earthquake magnitude sensing after the shake.Physical dimension is bigger than normal, and in order to reduce the monitoring influence of noise to earthquake, using the place and environment that monitoring is installed can only be away from the city hive, perhaps builds basement specially monitoring equipments such as seismometer are installed.So the monitoring point of earthquake at present all is in loose condition (of surface), and builds the monitoring point of basement as earthquake, problems such as floor area is big, cost height.

Summary of the invention:

High-accuracy deep-well six-dimensional seismograph of the present invention has overcome above-mentioned not enough problem, and a kind of novel high-precision deep-well six-dimensional seismograph is provided.According to characteristics such as the down-hole difference variation are little, the seismometer dynamic range that is installed in the down-hole remains at ± state of 120dB (240dB), so just can carry out high-precision sensing, test analysis and scientific research to the fine motion amount that earth rotation produced.If layout closely rationally can play the sensing effect that earthquake is given warning in advance.When between-40 ℃～55 ℃, changing as the environment temperature of using, the effective dynamic range of this seismometer remains on: 〉=160dB, accuracy (precision) :≤| ± 0.002|dB (≤| ± 0.01|%), wideband rings scope: 0～2500Hz, and the information sensing amount is more than 25 times of three-component seismometer.

The technical scheme that high-accuracy deep-well six-dimensional seismograph of the present invention is adopted for achieving the above object is; Adopt three quartz flexible servo circuit accelerometers simultaneously, degree of will speed up meter is fixedly mounted on the support, and the axial installation of sensing moment of each accelerometer is 90 angles each other, and in the housing of packing into.Housing profile bottom contacts for point with the bottom of deep-well for taper, on the same circular arc on top, housing outer end, be separately installed with three adjustment hasp and staple rings that become 120 degree angles and adjust steel wires and be connected with ground three adjustment winders with three, guarantee the zero reference point of the sensing moment axle of two horizontal directions (lateral shaft) by adjusting winder, the zero-bit of gravity field direction (longitudinal axis) has adopted the null balance control circuit, and the transducing signal of three accelerometers is connected with aviation socket on the housing by output lead.

Described quartz flexible servo circuit accelerometer is two moment device quartz flexible servo circuit accelerometers.

Described support is an aluminium alloy, accelerometer by screw retention on support.

Described housing is garden post taper, and the physical dimension minimum can be Ф 60mmX180mm, stainless steel material 1Cr18Ni9Ti.

Described aviation socket is installed on the housing by screw retention.

Described null balance control circuit is the electronics boostrap circuit.

The principle of work that high-accuracy deep-well six-dimensional seismograph of the present invention adopts; Adopt three quartz flexible servo circuit accelerometers simultaneously, the sensing axis of torque direction of three accelerometers is represented with x.y.z respectively, the sensing axis of torque direction of each accelerometer all is to be output as reference point with zero-bit, two (lateral shaft) zero reference points of horizontal direction guarantee by 3 coiling adjustment methods, the zero-bit of gravity field direction (longitudinal axis) has adopted the null balance control circuit, and three accelerometers all have positive vector voltage pulse signal and the output of negative vector voltage pulse signal.Positive and negative vector voltage pulse value is represented the direction of vibration and the amplitude of vibration respectively, and such three accelerometers have just been set up sextuple sensing system.

Description of drawings:

Fig. 1 is the six-vector voltage coordinate figure of three accelerometer sensing axis of torque outputs of expression.

1. the sensing axis of torque direction of two lateral shaft x and y accelerometer is parallel with the earth surface level, the sensing axis of torque direction of two accelerometers is crossed as an angle of 90 degrees and installs in a central shaft, the sensing axis of torque direction of longitudinal axis z accelerometer and the earth surface level are vertical to become an angle of 90 degrees to install, and has positive and negative vector voltage pulse value to represent the direction of vibration and the amplitude of vibration respectively according to each sensing axis of torque output.As: x axle represent east, west to.The y axle represent south, the north to.The z axle represent upper and lower to.

2. the null balance control circuit is adopted in the zero-bit adjustment of longitudinal axis z accelerometer fully.

Fig. 2 is a high-accuracy deep-well six-dimensional seismograph structure cross-sectional schematic of the present invention.

Embodiment:

High-accuracy deep-well six-dimensional seismograph as shown in Figure 2, with three quartz flexible servo circuit accelerometers (2). (4). (5) are installed in respectively on the support (3), be installed in the housing (1) by screw, the output signal of three accelerometers is connected with aviation socket (7) by signal wire (6), the zero-bit adjustment steel wire of horizontal direction by with ground three adjustment winders (8). (9). (10) are connected.

Claims

1. high-accuracy deep-well six-dimensional seismograph, it is characterized in that: with three quartz flexible servo circuit accelerometers (2). (4). (5) are installed in respectively on the support (3), be installed in the housing (1) by screw, the output signal of three accelerometers is connected with aviation socket (7) by signal wire (6), the zero-bit adjustment steel wire of horizontal direction by with ground three adjustment winders (8). (9). (10) are connected.

2. high-accuracy deep-well six-dimensional seismograph according to claim 1 is characterized in that: adopt three quartz flexible servo circuit accelerometers (2) simultaneously. (4). and (5) are two moment device quartz flexible servo circuit accelerometers.

3. high-accuracy deep-well six-dimensional seismograph according to claim 1 is characterized in that: the axial installation of sensing moment of three accelerometers is 90 angles each other.Accelerometer (2) wherein. (4) zero-bit adjustment adopts 3 hasp and staple to adjust method around line, and the null balance control circuit is adopted in the zero-bit adjustment of accelerometer (5).

4. high-accuracy deep-well six-dimensional seismograph according to claim 1 is characterized in that: support (4) is an aluminum alloy materials.

5. high-accuracy deep-well six-dimensional seismograph according to claim 1 is characterized in that: housing (1) is garden post taper, and the physical dimension minimum can be Φ 60mm * 180mm, stainless steel material 1Cr18Ni9Ti.