CN109061757B - Electronic full-automatic relative gravity acceleration surveying device and method - Google Patents
Electronic full-automatic relative gravity acceleration surveying device and method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V7/00—Measuring gravitational fields or waves; Gravimetric prospecting or detecting
- G01V7/14—Measuring gravitational fields or waves; Gravimetric prospecting or detecting using free-fall time
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Abstract
The invention discloses an electronic full-automatic relative gravity acceleration surveying device and method, wherein the device comprises a shell, an outer vacuum cavity, an inner vacuum cavity, an elastic rod, a piezoelectric sensor, a connecting rod, a heavy object, an X-axis piezoelectric motor, a Y-axis piezoelectric motor, a voltage regulator, a piezoelectric converter, a microprocessor and a man-machine interface; the piezoelectric sensor, the connecting rod and the heavy load are arranged in the inner vacuum cavity; the top and the bottom of the piezoelectric sensor are fixedly connected with the inner vacuum cavity and the connecting rod respectively, and the heavy load is arranged at the bottom end of the connecting rod; the X-axis piezoelectric motor and the Y-axis piezoelectric motor are arranged between the inner vacuum cavity and the inner vacuum cavity; the piezoelectric transducer is electrically connected with the piezoelectric sensor, and the voltage regulator is respectively and electrically connected with the X-axis piezoelectric motor and the Y-axis piezoelectric motor; the microprocessor is electrically connected with the piezoelectric converter, the voltage regulator and the man-machine interface respectively. The invention also provides a method of surveying using the apparatus. The invention has simple and stable structure, small volume and convenient and rapid operation.
Description
Technical Field
The invention relates to geophysical prospecting equipment and an exploration method, in particular to an electronic full-automatic relative gravity acceleration surveying device and method.
Background
The gravity acceleration values at different locations on the ground are different, and even the gravity acceleration at the same point is different at different points in time. The change in gravitational acceleration may be caused by the difference in shape of the earth and density of medium in the earth, or by gravitational attraction. Gravity measurement plays a significant role in the geophysical field. Gravity measurement is divided into relative gravity measurement and absolute gravity measurement. Relative gravity measurement is mainly used to measure changes in gravity, and such gravity anomaly surveys are particularly important in the mineral and oil exploration industries.
Important parameters of the relative gravimeter are accuracy, followed by volume and operational complexity, etc. The current high-precision gravimeter adopts the superconducting magnetic suspension technology, but the structure needs additional devices such as liquid nitrogen and the like to ensure the superconducting property of the superconductor due to the relative immaturity of the superconducting technology, so that the structure is complex, the use is inconvenient and the manufacturing cost is high. The traditional relative gravity meter adopts a mechanical spring suspension structure, the mechanical characteristics of the gravity meter can not achieve both sensitivity and small volume, the material characteristics are demanding, the mechanical fatigue and temperature drift are required to be overcome, and meanwhile, the gravity meter is inconvenient to use and operate, and manual correction and reading are required to be performed by a user; the structure determines that if an electronic auxiliary device is added, errors of a mechanical part and an electronic part are overlapped, and the precision is reduced.
Disclosure of Invention
The invention aims to provide a relative gravity surveying device and a surveying method, in particular to an electronic full-automatic relative gravity acceleration surveying device and a method based on a piezoelectric sensor, which are used for gravity anomaly surveying, especially petroleum and mineral exploration, and overcome the problems and the defects of the prior traditional technology and the modern technology.
In order to achieve the above purpose, the invention provides an electronic full-automatic relative gravity acceleration surveying device, wherein the surveying device comprises a shell, an outer vacuum cavity, an inner vacuum cavity, an elastic rod, a piezoelectric sensor, a connecting rod, a heavy object, an X-axis piezoelectric motor, a Y-axis piezoelectric motor, a voltage regulator, a piezoelectric converter, a microprocessor and a man-machine interface; the outer vacuum cavity is arranged in the shell and is formed by the inner wall of the shell; the inner vacuum cavity is arranged in the outer vacuum cavity; the piezoelectric sensor, the connecting rod and the heavy load are arranged in the inner vacuum cavity; the top of the piezoelectric sensor is fixedly connected with the top surface of the inner cavity wall of the inner vacuum cavity, the bottom of the piezoelectric sensor is fixedly connected with the top end of the connecting rod, and the heavy load is arranged at the bottom end of the connecting rod and is fixed with the connecting rod; the elastic rod is arranged between the outer top surface of the inner vacuum cavity and the inner top surface of the outer vacuum cavity; the X-axis piezoelectric motor and the Y-axis piezoelectric motor are arranged between the inside of the outer vacuum cavity and the inner vacuum cavity; the piezoelectric transducer is electrically connected with the piezoelectric sensor, and the voltage regulator is respectively and electrically connected with the X-axis piezoelectric motor and the Y-axis piezoelectric motor; the microprocessor is electrically connected with the piezoelectric converter, the voltage regulator and the man-machine interface respectively. The X-axis piezoelectric motor and the Y-axis piezoelectric motor are preferably piezoelectric motors of the Piezo walk series; piezoelectric sensor, piezoelectric converter and voltage regulator adopt KAMAN series; the microprocessor is MCU, and adopts Xilinx ZynQ high-speed processing platform; the human interface has the function of a keyboard and a display, preferably a touch screen.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that the shell, the outer vacuum cavity and the inner vacuum cavity are coaxial cylinders, the top surface of the shell is higher than that of the outer vacuum cavity, the top surface of the outer vacuum cavity is higher than that of the inner vacuum cavity, the bottom surface of the inner vacuum cavity is higher than that of the outer vacuum cavity, and the bottom surface of the outer vacuum cavity is higher than that of the shell.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that the outer vacuum cavity and the inner vacuum cavity are vacuum chambers. The outer cavity of the instrument is a vacuum cavity to remove gas resistance interference and prevent electrostatic interference caused by friction with gas.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that the top of the inner vacuum cavity is connected with the elastic rod and is connected with the outer vacuum cavity through the elastic rod, so that the inner vacuum cavity is suspended in the outer vacuum cavity and can swing.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that the swinging direction of the inner vacuum cavity can be automatically adjusted by an X-axis piezoelectric motor and a Y-axis piezoelectric motor.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that one end of each of the X-axis piezoelectric motor and the Y-axis piezoelectric motor is fixed with the inner wall of the shell, and the other end of each of the X-axis piezoelectric motor and the Y-axis piezoelectric motor is tightly attached to the outer wall of the inner vacuum cavity and is not fixed with the outer wall of the inner vacuum cavity.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that the axis of the X-axis piezoelectric motor extending in the horizontal direction is perpendicular to the axis of the Y-axis piezoelectric motor extending in the horizontal direction.
The electronic full-automatic relative gravity acceleration surveying device is characterized in that the X-axis piezoelectric motor and the Y-axis piezoelectric motor are positioned at the lower part of the outer wall of the inner vacuum cavity.
The invention also provides a method for surveying by using the electronic full-automatic relative gravity acceleration surveying device, wherein the method comprises the following steps: placing the surveying device to a place to be detected, switching on a power supply, initializing the surveying device, reading information of a piezoelectric sensor by a piezoelectric transducer, performing signal filtering, amplifying and A/D conversion, transmitting the processed information to a microprocessor, and displaying final relative gravity information through a man-machine interface after the microprocessor processes the information. The weight generates a pulling force caused by gravity to the piezoelectric sensor through the connecting rod so as to combine the weights of the weight and the connecting rod to obtain a relative gravity acceleration value. The connecting rod plays a role in amplifying torque generated by the heavy load due to the inclination of the instrument, so that the microprocessor correspondingly adjusts the sensed torque to drive the X-axis piezoelectric motor and the Y-axis piezoelectric motor to correct the inclination of the instrument. The microprocessor is the core of the whole electronic part and plays a role of a control algorithm and other core functions. The piezoelectric transducer performs preliminary amplification, filtering, D/a conversion, and the like on the signal generated by the piezoelectric sensor. The voltage regulator, the X-axis piezoelectric motor and the Y-axis piezoelectric motor form a servo driving system which is controlled by a microprocessor. The man-machine interface serves the task of data display and data input.
The method for surveying by using the electronic full-automatic relative gravity acceleration surveying device, wherein the initializing is as follows: the method comprises the steps that firstly, a microprocessor drives an X-axis piezoelectric motor through a power supply, receives voltage feedback of the X-axis piezoelectric motor, controls the X-axis piezoelectric motor to stretch and swing to push an inner vacuum cavity, meanwhile, the microprocessor reads data of a piezoelectric sensor and judges the data, if the value of the piezoelectric sensor is larger than a front value in the movement process of the X-axis piezoelectric motor, the microprocessor controls the X-axis piezoelectric motor to continuously move in the same direction, if the value of the piezoelectric sensor is smaller than the front value, the microprocessor controls the X-axis piezoelectric motor to move in the opposite direction, and finally, the X-axis piezoelectric motor is stabilized at a maximum value point measured by the piezoelectric sensor to reach the same plane as the gravity acceleration direction of the point; and then the Y-axis piezoelectric motor repeats the process of the X-axis piezoelectric motor, the same action is performed, the obtained two surfaces which are the same as the gravity acceleration direction of the maximum value point measured by the piezoelectric sensor are intersected, the gravity acceleration direction of the point is obtained, and finally, the connecting rod is consistent with the gravity acceleration direction, so that the initialization is completed.
The method for surveying by using the electronic full-automatic relative gravity acceleration surveying device comprises the step of locking the X-axis piezoelectric motor and the Y-axis piezoelectric motor after initialization is completed, and fixing the positions.
The electronic full-automatic relative gravity acceleration surveying device and method provided by the invention have the following advantages:
the method can be applied to the scenes such as geophysical prospecting and geophysical physics and the like which need to read the relative gravity acceleration of a certain place. The implementation mode is simple, only the instrument is required to be horizontally placed at a target place, the inclination of the instrument is automatically detected according to the sensor, and the instrument is automatically corrected through the piezoelectric motor, so that the instrument initialization is completed; after initialization, the instrument reads the piezoelectric signal through the piezoelectric sensor, processes and analyzes the signal through the microprocessor to obtain the relative acceleration value, and displays the relative acceleration value on the human-computer interface. The invention has simple and stable structure, small volume and convenient and rapid operation.
Drawings
FIG. 1 is a schematic diagram of an electronic fully automatic relative gravity acceleration survey device according to the present invention.
FIG. 2 is a schematic diagram of an electronic fully automatic relative gravity acceleration survey device of the present invention.
FIG. 3 is a flowchart of the operation of the electronic fully automated relative gravity acceleration survey device of the present invention.
FIG. 4 is a flowchart of the initialization of the electronic full-automatic relative gravity acceleration survey device of the present invention.
Wherein: 1. a connecting rod; 2. a piezoelectric sensor; 3. an elastic rod; 4. a housing; 5. an outer vacuum chamber; 6. an inner vacuum chamber; 7. a heavy load; 8. an X-axis piezoelectric motor; 9. a Y-axis piezoelectric motor; 10. a piezoelectric transducer; 11. a voltage regulator; 12. a microprocessor; 13. a human-machine interface; 14. a lumen wall.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
As shown in fig. 1, the electronic full-automatic relative gravity acceleration surveying device provided by the invention comprises a casing 4, an outer vacuum cavity 5, an inner vacuum cavity 6, an elastic rod 3, a piezoelectric sensor 2, a connecting rod 1, a weight 7, an X-axis piezoelectric motor 8, a Y-axis piezoelectric motor 9, a voltage regulator 11, a piezoelectric converter 10, a microprocessor 12 and a man-machine interface 13; the outer vacuum cavity 5 is arranged in the shell 4, and the outer vacuum cavity 5 is formed by the inner wall of the shell 4; the inner vacuum cavity 6 is arranged in the outer vacuum cavity 5; the piezoelectric sensor 2, the connecting rod 1 and the heavy load 7 are arranged in the inner vacuum cavity 6; the top of the piezoelectric sensor 2 is fixedly connected with the top surface of the inner cavity wall 14 of the inner vacuum cavity 6, the bottom of the piezoelectric sensor 2 is fixedly connected with the top end of the connecting rod 1, and the heavy load 7 is arranged at the bottom end of the connecting rod 1 and is fixed with the connecting rod 1; the elastic rod 3 is arranged between the outer top surface of the inner vacuum cavity 6 and the inner top surface of the outer vacuum cavity 5; the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 are arranged between the inside of the outer vacuum cavity 5 and the inner vacuum cavity 6; the piezoelectric transducer 10 is electrically connected with the piezoelectric sensor 2, and the voltage regulator 11 is electrically connected with the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 respectively; the microprocessor 12 is electrically connected to the piezoelectric transducer 10, the voltage regulator 11, and the man-machine interface 13, respectively.
The shell 4, the outer vacuum cavity 5 and the inner vacuum cavity 6 are coaxial cylinders, the top surface of the shell 4 is higher than the top surface of the outer vacuum cavity 5, the top surface of the outer vacuum cavity 5 is higher than the top surface of the inner vacuum cavity 6, the bottom surface of the inner vacuum cavity 6 is higher than the bottom surface of the outer vacuum cavity 5, and the bottom surface of the outer vacuum cavity 5 is higher than the bottom surface of the shell 4.
The outer vacuum chamber 5 and the inner vacuum chamber 6 are vacuum chambers. The top of the inner vacuum chamber 6 is connected with the elastic rod 3 and is connected with the outer vacuum chamber 5 through the elastic rod 3, so that the inner vacuum chamber 6 is suspended in the outer vacuum chamber 5 and can swing.
The swinging direction of the inner vacuum chamber 6 can be automatically adjusted by the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9.
The X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 are respectively provided with one end fixed with the inner wall of the shell 4, and the other end is respectively clung to the outer wall of the inner vacuum cavity 6 and is not fixed with the outer wall of the inner vacuum cavity 6. The axis of the X-axis piezoelectric motor 8 extending in the horizontal direction is perpendicular to the axis of the Y-axis piezoelectric motor 9 extending in the horizontal direction. An X-axis piezoelectric motor 8 and a Y-axis piezoelectric motor 9 are located at a lower portion of the outer wall of the inner vacuum chamber 6.
The invention also provides a method for surveying by using the electronic full-automatic relative gravity acceleration surveying device, which comprises the following steps: the surveying device is placed at a place to be measured, a power supply is connected, the surveying device is initialized, the piezoelectric transducer 10 reads information of the piezoelectric sensor 2, signal filtering, amplification and A/D conversion are conducted, the information after the processing is transmitted to the microprocessor 12, and after the microprocessor 12 conducts processing, final relative gravity information is displayed through the man-machine interface 13.
The initialization process is as follows: firstly, a microprocessor 12 drives an X-axis piezoelectric motor 8 through a power supply, receives voltage feedback of the X-axis piezoelectric motor 8, controls the X-axis piezoelectric motor 8 to stretch and swing to push an inner vacuum cavity 6, meanwhile, the microprocessor 12 reads data of a piezoelectric sensor 2 and judges, in the movement process of the X-axis piezoelectric motor 8, if the value of the piezoelectric sensor 2 is larger than a front value, the microprocessor 12 controls the X-axis piezoelectric motor 8 to continuously move in the same direction, if the value of the piezoelectric sensor 2 is smaller than the front value, the microprocessor 12 controls the X-axis piezoelectric motor 8 to move in the opposite direction, and finally, the microprocessor 12 is stabilized at a maximum value point measured by the piezoelectric sensor 2 to reach the same plane as the gravity acceleration direction of the point; and then the Y-axis piezoelectric motor 9 repeats the process of the X-axis piezoelectric motor 8, the same action is performed, and the obtained two surfaces which are the same as the gravity acceleration direction of the maximum value point measured by the piezoelectric sensor 2 are intersected to obtain the gravity acceleration direction of the point, so that the connecting rod 1 is finally consistent with the gravity acceleration direction, and the initialization is completed. After the initialization is completed, the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 are locked and fixed. See fig. 2-4.
The electronic full-automatic relative gravity acceleration survey device provided by the invention is further described below with reference to the embodiments.
Example 1
An electronic full-automatic relative gravity acceleration surveying device comprises a shell 4, an outer vacuum cavity 5, an inner vacuum cavity 6, an elastic rod 3, a piezoelectric sensor 2, a connecting rod 1, a heavy object 7, an X-axis piezoelectric motor 8, a Y-axis piezoelectric motor 9, a voltage regulator 11, a piezoelectric converter 10, a microprocessor 12 and a man-machine interface 13.
The outer vacuum cavity 5 is arranged in the shell 4, and the outer vacuum cavity 5 is formed by the inner wall of the shell 4; the inner vacuum cavity 6 is arranged in the outer vacuum cavity 5; the piezoelectric sensor 2, the connecting rod 1 and the heavy load 7 are arranged in the inner vacuum cavity 6; the top of the piezoelectric sensor 2 is fixedly connected with the top surface of the inner cavity wall 14 of the inner vacuum cavity 6, the bottom of the piezoelectric sensor 2 is fixedly connected with the top end of the connecting rod 1, and the heavy load 7 is arranged at the bottom end of the connecting rod 1 and is fixed with the connecting rod 1; the elastic rod 3 is arranged between the outer top surface of the inner vacuum cavity 6 and the inner top surface of the outer vacuum cavity 5; the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 are arranged between the inside of the outer vacuum cavity 5 and the inner vacuum cavity 6; the piezoelectric transducer 10 is electrically connected with the piezoelectric sensor 2, and the voltage regulator 11 is electrically connected with the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 respectively; the microprocessor 12 is electrically connected to the piezoelectric transducer 10, the voltage regulator 11, and the man-machine interface 13, respectively.
The shell 4, the outer vacuum cavity 5 and the inner vacuum cavity 6 are coaxial cylinders, the top surface of the shell 4 is higher than the top surface of the outer vacuum cavity 5, the top surface of the outer vacuum cavity 5 is higher than the top surface of the inner vacuum cavity 6, the bottom surface of the inner vacuum cavity 6 is higher than the bottom surface of the outer vacuum cavity 5, and the bottom surface of the outer vacuum cavity 5 is higher than the bottom surface of the shell 4. The outer vacuum chamber 5 and the inner vacuum chamber 6 are vacuum chambers. The outer cavity of the instrument is a vacuum cavity to remove gas resistance interference and prevent electrostatic interference caused by friction with gas. The top of the inner vacuum chamber 6 is connected with the elastic rod 3 and is connected with the outer vacuum chamber 5 through the elastic rod 3, so that the inner vacuum chamber 6 is suspended in the outer vacuum chamber 5 and can swing. The swinging direction of the inner vacuum chamber 6 can be automatically adjusted by the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9.
The X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 are respectively provided with one end fixed with the inner wall of the shell 4, and the other end is respectively clung to the outer wall of the inner vacuum cavity 6 and is not fixed with the outer wall of the inner vacuum cavity 6. The axis of the X-axis piezoelectric motor 8 extending in the horizontal direction is perpendicular to the axis of the Y-axis piezoelectric motor 9 extending in the horizontal direction. An X-axis piezoelectric motor 8 and a Y-axis piezoelectric motor 9 are located at a lower portion of the outer wall of the inner vacuum chamber 6.
The X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 are preferably piezo motors of the piezo walk series; piezoelectric sensor 2, piezoelectric transducer 10, voltage regulator 11 adopt KAMAN series; the microprocessor 12, i.e. MCU, adopts a Xilinx ZynQ high-speed processing platform; the man-machine interface 13 has the function of a keyboard and a display, preferably a touch screen.
The embodiment also provides a method for surveying by using the electronic full-automatic relative gravity acceleration surveying device, which comprises the following steps: after the instrument is placed to a place to be measured, the X-axis piezoelectric motor 8 will stretch and swing and finally be stabilized at the maximum value point of the measured piezoelectric sensor 2, namely the surface with the same gravity acceleration direction as the maximum value point; the Y-axis piezo motor 9 will then do the same. The gravity acceleration direction of the point is obtained by intersecting the two surfaces. I.e. the final link 1 coincides with the direction of gravitational acceleration. The initialization action before the survey is completed. After the initialization is completed, the X-axis motor and the Y-axis motor are locked.
After the initialization is completed, the instrument piezoelectric transducer 10 reads information of the piezoelectric sensor 2, and performs processing such as signal filtering, amplification, a/D conversion, and the like. The information after the processing is transmitted to the microprocessor 12, and the microprocessor 12 displays the information such as the relative gravity value required by the operator to the operator through the man-machine interface 13 after further processing.
The weight 7 generates a pulling force caused by gravity to the piezoelectric sensor 2 through the link 1 to determine a relative gravity acceleration value by combining the weights of the weight 7 and the link 1.
The connecting rod 1 plays a role in amplifying the torque generated by the heavy load 7 due to the inclination of the instrument, so that the microprocessor 12 correspondingly adjusts the sensed torque to drive the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 to correct the inclination of the instrument.
The microprocessor 12 is the core of the whole electronic part and plays a core role of a control algorithm and the like.
The piezoelectric transducer 10 performs preliminary amplification, filtering, D/a conversion, and the like on the signal generated by the piezoelectric sensor 2.
The voltage regulator 11 and the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9 form a servo driving system, and are controlled by the microprocessor 12.
The human interface 13 performs the task of data display and data input. The human interface 13 has not only a data display function but also a data input function. Is an interface for human and instrument interaction information. The man-machine interface 13 is a touch screen interface, and the microprocessor 12 carries an operating system.
The operating system of the instrument is provided with self-contained custom software, and gravity data is directly converted into a target information format.
The data measured by the system is stored in real time, and a user can read target data, original data or intermediate data by himself.
The microprocessor 12 uses PI control (proportional-Integral control) to perform accurate and rapid servo control on the X-axis piezoelectric motor 8 and the Y-axis piezoelectric motor 9, and the PI control algorithm is an existing common automatic control algorithm.
The electronic full-automatic relative gravity acceleration surveying device provided by the invention can be applied to the scene of geophysics, geophysics and the like needing to read the relative gravity acceleration of a certain place, and has the advantages of simple implementation mode, simple and stable structure, small volume and convenience and rapidness in operation.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (7)
1. The electronic full-automatic relative gravity acceleration surveying device is characterized by comprising a shell, an outer vacuum cavity, an inner vacuum cavity, an elastic rod, a piezoelectric sensor, a connecting rod, a heavy object, an X-axis piezoelectric motor, a Y-axis piezoelectric motor, a voltage regulator, a piezoelectric converter, a microprocessor and a man-machine interface;
the outer vacuum cavity is arranged in the shell and is formed by the inner wall of the shell; the inner vacuum cavity is arranged in the outer vacuum cavity;
the piezoelectric sensor, the connecting rod and the heavy load are arranged in the inner vacuum cavity; the top of the piezoelectric sensor is fixedly connected with the top surface of the inner cavity wall of the inner vacuum cavity, the bottom of the piezoelectric sensor is fixedly connected with the top end of the connecting rod, and the heavy load is arranged at the bottom end of the connecting rod and is fixed with the connecting rod;
the elastic rod is arranged between the outer top surface of the inner vacuum cavity and the inner top surface of the outer vacuum cavity;
the X-axis piezoelectric motor and the Y-axis piezoelectric motor are arranged between the inside of the outer vacuum cavity and the inner vacuum cavity;
the piezoelectric transducer is electrically connected with the piezoelectric sensor, and the voltage regulator is respectively and electrically connected with the X-axis piezoelectric motor and the Y-axis piezoelectric motor; the microprocessor is electrically connected with the piezoelectric converter, the voltage regulator and the man-machine interface respectively;
the top of the inner vacuum cavity is connected with the elastic rod and is connected with the outer vacuum cavity through the elastic rod, so that the inner vacuum cavity is suspended in the outer vacuum cavity and can swing;
the swinging direction of the inner vacuum cavity is regulated by an X-axis piezoelectric motor and a Y-axis piezoelectric motor;
the electronic full-automatic relative gravity acceleration surveying device surveys the method that does not need: placing the surveying device to a place to be detected, switching on a power supply, initializing the surveying device, reading information of a piezoelectric sensor by a piezoelectric transducer, performing signal filtering, amplifying and A/D conversion, transmitting the processed information to a microprocessor, and displaying final relative gravity information through a man-machine interface after the microprocessor processes the information.
2. The electronic full-automatic relative gravity acceleration measuring device of claim 1, wherein the housing, the outer vacuum chamber and the inner vacuum chamber are coaxial cylinders, the top surface of the housing is higher than the top surface of the outer vacuum chamber, the top surface of the outer vacuum chamber is higher than the top surface of the inner vacuum chamber, the bottom surface of the inner vacuum chamber is higher than the bottom surface of the outer vacuum chamber, and the bottom surface of the outer vacuum chamber is higher than the bottom surface of the housing.
3. The electronic full-automatic relative gravity acceleration measuring device of claim 2, wherein the outer vacuum chamber and the inner vacuum chamber are vacuum chambers.
4. The electronic full-automatic relative gravity acceleration measuring device according to claim 3, wherein the X-axis piezoelectric motor and the Y-axis piezoelectric motor are respectively fixed to the inner wall of the casing at one end and are respectively attached to the outer wall of the inner vacuum chamber at the other end, and are not fixed to the outer wall of the inner vacuum chamber.
5. The electronic full-automatic relative gravity acceleration measuring device according to claim 4, wherein the axis of the X-axis piezoelectric motor extending in the horizontal direction is perpendicular to the axis of the Y-axis piezoelectric motor extending in the horizontal direction; the X-axis piezoelectric motor and the Y-axis piezoelectric motor are positioned at the lower part of the outer wall of the inner vacuum cavity.
6. An electronic fully automated relative gravity acceleration survey apparatus according to claim 1 wherein the initialisation is: the method comprises the steps that firstly, a microprocessor drives an X-axis piezoelectric motor through a power supply, receives voltage feedback of the X-axis piezoelectric motor, controls the X-axis piezoelectric motor to stretch and swing to push an inner vacuum cavity, meanwhile, the microprocessor reads data of a piezoelectric sensor and judges the data, if the value of the piezoelectric sensor is larger than a front value in the movement process of the X-axis piezoelectric motor, the microprocessor controls the X-axis piezoelectric motor to continuously move in the same direction, if the value of the piezoelectric sensor is smaller than the front value, the microprocessor controls the X-axis piezoelectric motor to move in the opposite direction, and finally, the X-axis piezoelectric motor is stabilized at a maximum value point measured by the piezoelectric sensor to reach the same plane as the gravity acceleration direction of the point; and then the Y-axis piezoelectric motor repeats the process of the X-axis piezoelectric motor, and the obtained two surfaces which are the same as the gravity acceleration direction of the maximum value point measured by the piezoelectric sensor are intersected to obtain the gravity acceleration direction of the point, so that the connecting rod is finally consistent with the gravity acceleration direction, and the initialization is completed.
7. The electronic full-automatic relative gravity acceleration survey apparatus of claim 6, wherein the X-axis piezoelectric motor and the Y-axis piezoelectric motor are locked after the initialization is completed.
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| CN104793257A (en) * | 2015-05-04 | 2015-07-22 | 中国科学院测量与地球物理研究所 | Portable relative gravity instrument based on high-voltage suspension |
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| US6668646B1 (en) * | 2001-06-21 | 2003-12-30 | The Open University | Gravity meter |
| JP2009115525A (en) * | 2007-11-05 | 2009-05-28 | Univ Of Tokyo | Gravity gradient measuring apparatus |
| CN103018784A (en) * | 2012-11-28 | 2013-04-03 | 华中科技大学 | Simple-pendulum absolute gravimeter based on two-point fixed differential measurement |
| CN103675936A (en) * | 2013-12-12 | 2014-03-26 | 中国科学院测量与地球物理研究所 | Precise simple-pendulum type relative gravity meter |
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| CN109061757A (en) | 2018-12-21 |
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