CN1760506A - Sensor of direction of deflection - Google Patents
Sensor of direction of deflection Download PDFInfo
- Publication number
- CN1760506A CN1760506A CNA2005100440163A CN200510044016A CN1760506A CN 1760506 A CN1760506 A CN 1760506A CN A2005100440163 A CNA2005100440163 A CN A2005100440163A CN 200510044016 A CN200510044016 A CN 200510044016A CN 1760506 A CN1760506 A CN 1760506A
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- sensor
- integrated circuit
- deflection
- temperature
- accelerometer
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Abstract
The present invention relates to a sensor capable of simultaneously measuring seven parameters, and is applicable to measurement of whole deviation angle, drift azimuth and temperature. Its technical scheme includes three quartz accelerometers, three flux-gate magneto meters and a double-end integrated circuit temperature sensor. The quartz accelerometer is composed of two portions of meter component and servo circuit component, the flux-gate magnetometer is formed from two portions of probe and amplifying circuit and the double-end integrated circuit temperature sensor is a voltage input and current output type integrated circuit. Besides, said invention also provides its working principle, and the invented sensor is applicable to various borehole deviation direction logging units.
Description
One, technical field: the present invention relates to a kind of sensor that can measure seven parameters simultaneously, be suitable for hole angle, the measurement of drift azimuth and temperature.
Two, background technology: direction of deflection well logging, start from dipmeter log, after separate separately as a kind of instrument.At present, the direction of deflection logging instrument is used widely in oil well logging, before 1996, what the direction of deflection logging instrument adopted is the sensor that quartz accelerometer is housed, quartz accelerometer at that time all is the substandard products of military products, and price is lower, and anti-seismic performance is very poor, damage very seriously, even influence production application.After this, used the strong electromagnetic levitation type accelerometer of anti-seismic performance instead, this accelerometer has used leather bag in order to solve the pressure balance problem of variations in temperature in the accelerometer gauge outfit, and the time has been grown and can agingly leak gas, thereby its certainty of measurement is degenerated, As time goes on, repair rate obviously increases, simultaneously, the reaction speed of this electromagnetic levitation type accelerometer is comparatively slow, influences logging quality sometimes.
Three, summary of the invention: purpose of the present invention is exactly the problem that exists at prior art, and a kind of sensor of direction of deflection of measuring hole deviation, direction of deflection and temperature simultaneously is provided.
Its technical scheme is to comprise three quartz accelerometers, three fluxgate magnetometers and a both-end integrated circuit temperature sensor.Quartz accelerometer is made of gauge outfit assembly and servo circuit component two parts, and fluxgate magnetometer is made up of probe and amplifying circuit two parts, and the both-end integrated circuit temperature sensor is a voltage input and current output type integrated circuit.Its output current is directly proportional with absolute temperature, is 1 μ A/ ° K, and the scale factor when current transformation is DC voltage is for being 1mv/ ° of K.
Sensor of the present invention has overcome long, problem such as reaction is slow, precision is low traditional sensors start-up time, has to start advantages such as fast, that precision is high, high temperature resistant, shock resistance, accommodative ability of environment are strong, applicable to various direction of deflection logging instruments.
Four, description of drawings:
Fig. 1 is quartz accelerometer action principle figure of the present invention
Fig. 2 is a fluxgate magnetometer electrical schematic diagram of the present invention
Fig. 3 is temperature measurement circuit figure of the present invention
Five, the specific embodiment:
The measuring principle of quartz accelerometer (Fig. 1): when acceleration acted on the detection quality, its can depart from the equilbrium position because of inertia.Two pole plates of capacitance sensor and the differential variation of air gap between the excitation rings, so two variations that electric capacity is also differential, the differential capacitor detector detects this variation in the servo circuit, and export the information that displacement therewith is directly proportional with electrical signal form, amplify and processing through servo circuit, produce a direct current, feed back to the torquer coil.The result of it and permanent magnet effect produces an opposite force, causes pendulum mass to return to the equilbrium position.The electric current that is applied on the moment is directly proportional with the inertia force that inputs to the accelerometer pendulum mass, and it has reflected the size and Orientation of external action acceleration force.
The measuring principle of fluxgate magnetometer (Fig. 2): be wound with a pair of coil of series connection reversal connection in the probe on the annular magnetic conduction iron, their physical parameter and mechanical parameter are all made symmetry, and provide exciting curent by a drive circuit.Do not adding under the situation of external magnetic field, the induced potential at its centre cap place is zero.When external magnetic field acts on coil, because the iron core magnetization curve is non-linear, will there be the pulsating field of two times of magnet excitation frequencies that are directly proportional with external magnetic field to act on coil, make it to produce induced potential.This signal forms the output that a feedback current is transported to coil after frequency-selecting amplification, phase frequency demodulation, Integral Processing, it is with a superpose negative feedback current and produce the opposing magnetic field in iron core of two coils.When it equated with tested external magnetic field flux, probe output induced potential was zero, and the feedback current in the coil has been represented the size of input external magnetic field.
Temperature measurement circuit (Fig. 3): the both-end integrated circuit temperature sensor is a voltage input and current output type integrated circuit.Its output current is directly proportional with absolute temperature, is 1 μ A/ ° K, and the scale factor when current transformation is DC voltage is for being 1mv/ ° of K.
Claims (4)
1, a kind of sensor of direction of deflection is characterized in that: comprise quartz accelerometer, fluxgate magnetometer and temperature pick up composition.
2, sensor of direction of deflection according to claim 1 is characterized in that: comprise three quartz accelerometers, three fluxgate magnetometers and a temperature pick up composition.
3, sensor of direction of deflection according to claim 2 is characterized in that: described quartz accelerometer is a kind of single shaft pendulum-type servo accelerometer of flexible support, is made of gauge outfit assembly and servo circuit component two parts; Described fluxgate magnetometer is a kind of magnet-sensitive element of making based on the second harmonic principle, is made up of probe and amplifying circuit two parts; Described temperature pick up is a kind of both-end integrated circuit temperature sensor of voltage input and current output type.
4, sensor of direction of deflection according to claim 3 is characterized in that: the output current of described temperature pick up is directly proportional with absolute temperature, is 1 μ A/ ° K, and the scale factor when current transformation is DC voltage is 1mv/ ° of K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100440163A CN1760506A (en) | 2005-07-07 | 2005-07-07 | Sensor of direction of deflection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100440163A CN1760506A (en) | 2005-07-07 | 2005-07-07 | Sensor of direction of deflection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1760506A true CN1760506A (en) | 2006-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100440163A Pending CN1760506A (en) | 2005-07-07 | 2005-07-07 | Sensor of direction of deflection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1760506A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466735A (en) * | 2010-11-10 | 2012-05-23 | 北京中联博韬科技咨询有限公司 | Accelerometer |
-
2005
- 2005-07-07 CN CNA2005100440163A patent/CN1760506A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466735A (en) * | 2010-11-10 | 2012-05-23 | 北京中联博韬科技咨询有限公司 | Accelerometer |
| CN102466735B (en) * | 2010-11-10 | 2013-09-18 | 北京中联博韬科技咨询有限公司 | Accelerometer |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |