CN112114165A - Accelerometer calibration system based on hybrid topological structure - Google Patents
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Abstract
The invention relates to an accelerometer calibration technology, in particular to an accelerometer calibration system based on a hybrid topological structure. The invention solves the problem that the existing accelerometer calibration system lacks a reasonable network topology structure and a quick and efficient transmission medium. An accelerometer calibration system based on a hybrid topology structure comprises a terminal part and a transmission medium part; the terminal part comprises three accelerometers to be measured, three standard accelerometers, six vibration speed sensors, three temperature sensors, three humidity sensors, three air pressure sensors, three magnetic field sensors, ten wireless APs, two differential amplifiers, two sigma-delta analog-to-digital converters, two digital extraction filters, three data isolators, a data collector, a servo amplifier, a baseline correction module, a storage server, a disk array, a PC (personal computer), three vibration exciters, three signal generators and three vibration tables. The invention is suitable for accelerometer calibration.
Description
Technical Field
The invention relates to an accelerometer calibration technology, in particular to an accelerometer calibration system based on a hybrid topological structure.
Background
Calibration of accelerometers is an important part of the design, manufacture and use of accelerometers. Currently, accelerometer calibration is mainly realized by an accelerometer calibration system. Under the prior art, the accelerometer calibration system is limited by the structure thereof, and generally lacks a reasonable network topology structure and a quick and efficient transmission medium, so that the problems of unstable data transmission and poor data transmission real-time performance are generally caused, and the reliability of the calibration process is directly influenced. Therefore, an accelerometer calibration system based on a hybrid topology structure is needed to be invented to solve the problem that the existing accelerometer calibration system lacks a reasonable network topology structure and a quick and efficient transmission medium.
Disclosure of Invention
The invention provides an accelerometer calibration system based on a hybrid topological structure, which aims to solve the problem that the existing accelerometer calibration system is lack of a reasonable network topological structure and a quick and efficient transmission medium.
The invention is realized by adopting the following technical scheme:
an accelerometer calibration system based on a hybrid topology structure comprises a terminal part and a transmission medium part;
the terminal part comprises three accelerometers to be measured, three standard accelerometers, six vibration speed sensors, three temperature sensors, three humidity sensors, three air pressure sensors, three magnetic field sensors, ten wireless APs, two differential amplifiers, two sigma-delta analog-to-digital converters, two digital extraction filters, three data isolators, a data collector, a servo amplifier, a baseline correction module, a storage server, a disk array, a PC (personal computer), three vibration exciters, three signal generators and three vibration tables;
the transmission medium part comprises optical fibers, an infrared channel, a wireless universal serial bus and first to third LonWorks buses;
output shafts of the three vibration exciters are connected with the three vibration tables in a one-to-one correspondence manner; the first accelerometer to be tested and the first standard accelerometer are both fixed on the table surface of the first vibration table, and the X axis of the first accelerometer to be tested and the X axis of the first standard accelerometer are both parallel to the output shaft of the first vibration exciter; the second accelerometer to be tested and the second standard accelerometer are both fixed on the table surface of the second vibration table, and the Y axis of the second accelerometer to be tested and the Y axis of the second standard accelerometer are both parallel to the output shaft of the second vibration exciter; the third accelerometer to be tested and the third standard accelerometer are both fixed on the table surface of the third vibration table, and the Z axis of the third accelerometer to be tested and the Z axis of the third standard accelerometer are both parallel to the output shaft of the third vibration exciter; the first vibration speed sensor and the second vibration speed sensor are both fixed on the table top of the first vibration table; the third vibration speed sensor and the fourth vibration speed sensor are fixed on the table top of the second vibration table; the fifth vibration speed sensor and the sixth vibration speed sensor are fixed on the table top of the third vibration table; the first temperature sensor, the first humidity sensor, the first air pressure sensor and the first magnetic field sensor are all fixed on the table top of the first vibrating table; the second temperature sensor, the second humidity sensor, the second air pressure sensor and the second magnetic field sensor are all fixed on the table top of the second vibrating table; the third temperature sensor, the third humidity sensor, the third air pressure sensor and the third magnetic field sensor are all fixed on the table top of the third vibrating table;
the three tested accelerometers are connected with a first wireless AP through optical fibers, the three standard accelerometers are connected with a second wireless AP through optical fibers, and the first wireless AP is wirelessly connected with the second wireless AP through an infrared channel; the three tested accelerometers and the three standard accelerometers jointly form branches of a tree-shaped topological structure, and the first wireless AP and the second wireless AP jointly form a trunk of the tree-shaped topological structure; the second wireless AP is connected with the first differential amplifier through an optical fiber; the first differential amplifier is connected with the first sigma-delta analog-to-digital converter through an optical fiber; the first sigma-delta analog-to-digital converter is connected with the first digital decimation filter through an optical fiber; the first digital decimation filter is connected with the first data isolator through an optical fiber; the first data isolator is connected with the data acquisition unit through an optical fiber;
the six vibration speed sensors are correspondingly connected with the third wireless AP, the fourth wireless AP and the eighth wireless AP one by one through optical fibers; the third to tenth wireless APs are wirelessly connected with the wireless universal serial bus, and the third to tenth wireless APs and the wireless universal serial bus form a bus type topological structure together; the ninth wireless AP and the tenth wireless AP are connected with the second differential amplifier through optical fibers; the second differential amplifier is connected with the second sigma-delta analog-to-digital converter through an optical fiber; the second sigma-delta analog-to-digital converter is connected with the second digital decimation filter through an optical fiber; the second digital decimation filter is connected with the second data isolator through an optical fiber; the second data isolator is connected with the servo amplifier through an optical fiber; the servo amplifier is connected with the data acquisition unit through an optical fiber;
the first temperature sensor, the first humidity sensor, the first air pressure sensor, the first magnetic field sensor and the third data isolator are all connected with a first LonWorks bus, and the first temperature sensor, the first humidity sensor, the first air pressure sensor, the first magnetic field sensor, the third data isolator and the first LonWorks bus form a bus type topological structure together; the second temperature sensor, the second humidity sensor, the second air pressure sensor, the second magnetic field sensor and the third data isolator are all connected with a second LonWorks bus, and the second temperature sensor, the second humidity sensor, the second air pressure sensor, the second magnetic field sensor, the third data isolator and the second LonWorks bus form a bus type topological structure; the third temperature sensor, the third humidity sensor, the third air pressure sensor, the third magnetic field sensor and the third data isolator are all connected with a third LonWorks bus, and the third temperature sensor, the third humidity sensor, the third air pressure sensor, the third magnetic field sensor, the third data isolator and the third LonWorks bus form a bus type topological structure together; the third data isolator is connected with the data acquisition unit through an optical fiber;
the data acquisition unit is connected with the baseline correction module through an optical fiber; the baseline correction module, the storage server, the disk array and the PC are connected end to end through optical fibers to form an annular topological structure; the three vibration exciters are connected with the servo amplifier through optical fibers, and the three vibration exciters and the servo amplifier form a star-shaped topological structure together; the three signal generators are all connected with the servo amplifier through optical fibers, and the three signal generators and the servo amplifier jointly form a star topology structure.
When the three-way driving circuit works, the three signal generators respectively generate one driving signal, and the three driving signals are all sent to the servo amplifier in real time through the optical fiber. The servo amplifier sends the three driving signals to the three vibration exciters in real time in a one-to-one correspondence mode through optical fibers. Under the drive of three paths of driving signals, output shafts of three vibration exciters vibrate, the output shaft of the first vibration exciter drives a first vibrating table, a first tested accelerometer and a first standard accelerometer to vibrate along the X-axis direction, the output shaft of the second vibration exciter drives a second vibrating table, a second tested accelerometer and a second standard accelerometer to vibrate along the Y-axis direction, and the output shaft of the third vibration exciter drives a third vibrating table, a third tested accelerometer and a third standard accelerometer to vibrate along the Z-axis direction.
In the vibration process, the three accelerometers to be tested respectively output one path of acceleration data, and the three paths of acceleration data are all sent to the first wireless AP in real time through optical fibers. The first wireless AP wirelessly transmits the three paths of acceleration data to the second wireless AP in real time through an infrared channel. The three standard accelerometers output acceleration data respectively, and the three acceleration data are all sent to the second wireless AP in real time through optical fibers. And the second wireless AP transmits the six-path acceleration data to the first differential amplifier in real time through the optical fiber. The first differential amplifier amplifies the six-way acceleration data, and then transmits the six-way acceleration data to the first sigma-delta analog-to-digital converter in real time through the optical fiber. The first sigma-delta analog-to-digital converter performs analog-to-digital conversion on the six-way acceleration data, and then sends the six-way acceleration data to the first digital decimation filter in real time through optical fibers. The first digital decimation filter performs decimation filtering on the six-path acceleration data, and then transmits the six-path acceleration data to the first data isolator in real time through the optical fiber. The first data isolator is used for carrying out data isolation on the six-path acceleration data, and then the six-path acceleration data are sent to the data acquisition unit in real time through the optical fibers. The three temperature sensors correspondingly acquire the environmental temperature data of the three vibration tables in real time one by one and send the environmental temperature data of the three vibration tables to the first to third LonWorks buses in real time one by one. The three humidity sensors correspondingly acquire the environmental humidity data of the three vibration tables in real time one by one, and correspondingly send the environmental humidity data of the three vibration tables to the first LonWorks bus to the third LonWorks bus in real time one by one. The three air pressure sensors correspondingly acquire the environmental air pressure data of the three vibrating tables in real time one by one and send the environmental air pressure data of the three vibrating tables to the first to third LonWorks buses in real time one by one. The three magnetic field sensors correspondingly acquire environmental magnetic field data of the three vibration tables in real time one by one, and correspondingly send the environmental magnetic field data of the three vibration tables to the first LonWorks bus to the third LonWorks bus in real time one by one. The third data isolator firstly accesses the first LonWorks bus to the third LonWorks bus in real time and obtains the environmental data (environmental temperature data, environmental humidity data, environmental air pressure data and environmental magnetic field data) of the three vibration tables, then carries out data isolation on the environmental data of the three vibration tables, and then sends the environmental data of the three vibration tables to the data acquisition unit in real time through optical fibers. And the data acquisition unit transmits the six-path acceleration data and the environmental data of the three vibration tables to the baseline correction module in real time through optical fibers. The base line correction module performs base line correction on the six-path acceleration data according to the environmental data of the three vibration tables, and then transmits the six-path acceleration data after the base line correction to the storage server, the disk array and the PC in real time through the optical fiber. And the storage server stores the six-path acceleration data after the baseline correction in real time. And the disk array performs real-time backup on the six-path acceleration data after the baseline correction. And the PC machine compares the six-path acceleration data after the baseline correction in real time (compares the acceleration data output by the first tested accelerometer with the acceleration data output by the first standard accelerometer in real time, compares the acceleration data output by the second tested accelerometer with the acceleration data output by the second standard accelerometer in real time, and compares the acceleration data output by the third tested accelerometer with the acceleration data output by the third standard accelerometer in real time), and displays the comparison result in real time. According to the displayed comparison result, the X-axis calibration of the first accelerometer to be tested, the Y-axis calibration of the second accelerometer to be tested and the Z-axis calibration of the third accelerometer to be tested can be realized.
Meanwhile, the first vibration speed sensor and the second vibration speed sensor respectively acquire vibration speed data of the first vibration table in real time, and respectively transmit the vibration speed data of the first vibration table to the third wireless AP and the fourth wireless AP in real time through optical fibers. And the third wireless AP and the fourth wireless AP respectively wirelessly transmit the vibration speed data of the first vibration table to the wireless universal serial bus in real time. The third vibration speed sensor and the fourth vibration speed sensor respectively acquire vibration speed data of the second vibration table in real time, and respectively transmit the vibration speed data of the second vibration table to the fifth wireless AP and the sixth wireless AP in real time through optical fibers. And the fifth wireless AP and the sixth wireless AP respectively wirelessly transmit the vibration speed data of the second vibration table to the wireless universal serial bus in real time. The fifth vibration speed sensor and the sixth vibration speed sensor respectively acquire the vibration speed data of the third vibration table in real time, and respectively transmit the vibration speed data of the third vibration table to the seventh wireless AP and the eighth wireless AP in real time through optical fibers. And the seventh wireless AP and the eighth wireless AP respectively wirelessly transmit the vibration speed data of the third vibrating table to the wireless universal serial bus in real time. The ninth wireless AP accesses the wireless universal serial bus in real time and obtains vibration speed data of the three vibration tables, and then sends the vibration speed data of the three vibration tables to the second differential amplifier in real time through the optical fiber (if the ninth wireless AP breaks down, the tenth wireless AP accesses the wireless universal serial bus in real time and obtains the vibration speed data of the three vibration tables, and then sends the vibration speed data of the three vibration tables to the second differential amplifier in real time through the optical fiber). The second differential amplifier amplifies the vibration speed data of the three vibration tables, and then sends the vibration speed data of the three vibration tables to the second sigma-delta analog-to-digital converter in real time through the optical fiber. And the second sigma-delta analog-to-digital converter performs analog-to-digital conversion on the vibration speed data of the three vibration tables, and then sends the vibration speed data of the three vibration tables to the second digital decimation filter in real time through optical fibers. And the second digital decimation filter performs decimation filtering on the vibration speed data of the three vibration tables, and then sends the vibration speed data of the three vibration tables to the second data isolator in real time through optical fibers. And the second data isolator is used for carrying out data isolation on the vibration speed data of the three vibration tables and then sending the vibration speed data of the three vibration tables to the servo amplifier in real time through optical fibers. The servo amplifier transmits the vibration speed data of the three vibration tables to the data acquisition unit in real time through the optical fibers on one hand, and superposes the vibration speed data of the three vibration tables and the three driving signals in real time on the other hand, and transmits the three signals obtained by superposition to the three vibration exciters in real time one by one through the optical fibers, so that closed-loop control is performed on the three vibration exciters. And the data acquisition unit transmits the vibration speed data of the three vibration tables to the baseline correction module in real time through optical fibers. And the baseline correction module transmits the vibration speed data of the three vibration tables to a storage server, a disk array and a PC (personal computer) in real time through optical fibers. And the storage server stores the vibration speed data of the three vibration tables in real time. And the disk array backs up the vibration speed data of the three vibration tables in real time. And the PC machine displays the vibration speed data of the three vibration tables in real time.
Based on the process, compared with the existing accelerometer calibration system, the accelerometer calibration system based on the hybrid topological structure has the following advantages by adopting a brand new structure: firstly, the invention comprehensively adopts a tree topology structure, a bus topology structure, a ring topology structure and a star topology structure, wherein the tree topology structure is utilized to have the advantages of easy expansion and easy fault isolation, the bus topology structure is utilized to have the advantages of simple structure, less required transmission medium, no central node, no fault of any node causing whole network paralysis, high reliability and easy expansion, the ring topology structure is utilized to have no path selection problem, simple control protocol and simple structure, only simple connection operation is needed when the nodes are increased or reduced, less required transmission medium and fixed transmission time, the star topology structure is utilized to have the advantages of simple structure, simple control, easy fault diagnosis and isolation, convenient service and good expansibility, and the invention has reasonable network topology structure, therefore, data transmission is more stable, and the real-time performance of data transmission is stronger, so that the reliability of the calibration process is effectively ensured. Secondly, the optical fiber and the infrared channel are used as transmission media, on one hand, the advantages of wide optical fiber frequency band, low loss, light weight, strong anti-interference capability, high fidelity and reliable performance are utilized, on the other hand, the advantages of difficult discovery and interception by people, strong confidentiality, strong anti-interference capability, convenient and flexible installation and no geographical range constraint are utilized, and the optical fiber and the infrared channel have the rapid and efficient transmission media, so that the data transmission is more stable, the real-time performance of the data transmission is stronger, and the reliability of the calibration process is further effectively ensured.
The accelerometer calibration system is reasonable in structure and ingenious in design, effectively solves the problem that an existing accelerometer calibration system lacks a reasonable network topology structure and a quick and efficient transmission medium, and is suitable for accelerometer calibration.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
An accelerometer calibration system based on a hybrid topology structure comprises a terminal part and a transmission medium part;
the terminal part comprises three accelerometers to be measured, three standard accelerometers, six vibration speed sensors, three temperature sensors, three humidity sensors, three air pressure sensors, three magnetic field sensors, ten wireless APs, two differential amplifiers, two sigma-delta analog-to-digital converters, two digital extraction filters, three data isolators, a data collector, a servo amplifier, a baseline correction module, a storage server, a disk array, a PC (personal computer), three vibration exciters, three signal generators and three vibration tables;
the transmission medium part comprises optical fibers, an infrared channel, a wireless universal serial bus and first to third LonWorks buses;
output shafts of the three vibration exciters are connected with the three vibration tables in a one-to-one correspondence manner; the first accelerometer to be tested and the first standard accelerometer are both fixed on the table surface of the first vibration table, and the X axis of the first accelerometer to be tested and the X axis of the first standard accelerometer are both parallel to the output shaft of the first vibration exciter; the second accelerometer to be tested and the second standard accelerometer are both fixed on the table surface of the second vibration table, and the Y axis of the second accelerometer to be tested and the Y axis of the second standard accelerometer are both parallel to the output shaft of the second vibration exciter; the third accelerometer to be tested and the third standard accelerometer are both fixed on the table surface of the third vibration table, and the Z axis of the third accelerometer to be tested and the Z axis of the third standard accelerometer are both parallel to the output shaft of the third vibration exciter; the first vibration speed sensor and the second vibration speed sensor are both fixed on the table top of the first vibration table; the third vibration speed sensor and the fourth vibration speed sensor are fixed on the table top of the second vibration table; the fifth vibration speed sensor and the sixth vibration speed sensor are fixed on the table top of the third vibration table; the first temperature sensor, the first humidity sensor, the first air pressure sensor and the first magnetic field sensor are all fixed on the table top of the first vibrating table; the second temperature sensor, the second humidity sensor, the second air pressure sensor and the second magnetic field sensor are all fixed on the table top of the second vibrating table; the third temperature sensor, the third humidity sensor, the third air pressure sensor and the third magnetic field sensor are all fixed on the table top of the third vibrating table;
the three tested accelerometers are connected with a first wireless AP through optical fibers, the three standard accelerometers are connected with a second wireless AP through optical fibers, and the first wireless AP is wirelessly connected with the second wireless AP through an infrared channel; the three tested accelerometers and the three standard accelerometers jointly form branches of a tree-shaped topological structure, and the first wireless AP and the second wireless AP jointly form a trunk of the tree-shaped topological structure; the second wireless AP is connected with the first differential amplifier through an optical fiber; the first differential amplifier is connected with the first sigma-delta analog-to-digital converter through an optical fiber; the first sigma-delta analog-to-digital converter is connected with the first digital decimation filter through an optical fiber; the first digital decimation filter is connected with the first data isolator through an optical fiber; the first data isolator is connected with the data acquisition unit through an optical fiber;
the six vibration speed sensors are correspondingly connected with the third wireless AP, the fourth wireless AP and the eighth wireless AP one by one through optical fibers; the third to tenth wireless APs are wirelessly connected with the wireless universal serial bus, and the third to tenth wireless APs and the wireless universal serial bus form a bus type topological structure together; the ninth wireless AP and the tenth wireless AP are connected with the second differential amplifier through optical fibers; the second differential amplifier is connected with the second sigma-delta analog-to-digital converter through an optical fiber; the second sigma-delta analog-to-digital converter is connected with the second digital decimation filter through an optical fiber; the second digital decimation filter is connected with the second data isolator through an optical fiber; the second data isolator is connected with the servo amplifier through an optical fiber; the servo amplifier is connected with the data acquisition unit through an optical fiber;
the first temperature sensor, the first humidity sensor, the first air pressure sensor, the first magnetic field sensor and the third data isolator are all connected with a first LonWorks bus, and the first temperature sensor, the first humidity sensor, the first air pressure sensor, the first magnetic field sensor, the third data isolator and the first LonWorks bus form a bus type topological structure together; the second temperature sensor, the second humidity sensor, the second air pressure sensor, the second magnetic field sensor and the third data isolator are all connected with a second LonWorks bus, and the second temperature sensor, the second humidity sensor, the second air pressure sensor, the second magnetic field sensor, the third data isolator and the second LonWorks bus form a bus type topological structure; the third temperature sensor, the third humidity sensor, the third air pressure sensor, the third magnetic field sensor and the third data isolator are all connected with a third LonWorks bus, and the third temperature sensor, the third humidity sensor, the third air pressure sensor, the third magnetic field sensor, the third data isolator and the third LonWorks bus form a bus type topological structure together; the third data isolator is connected with the data acquisition unit through an optical fiber;
the data acquisition unit is connected with the baseline correction module through an optical fiber; the baseline correction module, the storage server, the disk array and the PC are connected end to end through optical fibers to form an annular topological structure; the three vibration exciters are connected with the servo amplifier through optical fibers, and the three vibration exciters and the servo amplifier form a star-shaped topological structure together; the three signal generators are all connected with the servo amplifier through optical fibers, and the three signal generators and the servo amplifier jointly form a star topology structure.
In specific implementation, the temperature sensor is a digital temperature sensor; the humidity sensor adopts a digital humidity sensor; the air pressure sensor adopts a digital air pressure sensor; the magnetic field sensor adopts a digital magnetic field sensor; the differential amplifier adopts a low-noise and programmable-gain dual-channel differential amplifier; the sigma-delta analog-to-digital converter adopts a 24-bit sigma-delta analog-to-digital converter with high precision and multi-resolution; the digital decimation filter adopts a single-channel digital decimation filter with low power consumption; the optical fiber is a single mode optical fiber.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (2)
1. An accelerometer calibration system based on a hybrid topology structure is characterized in that: comprising a terminal portion and a transmission medium portion;
the terminal part comprises three accelerometers to be measured, three standard accelerometers, six vibration speed sensors, three temperature sensors, three humidity sensors, three air pressure sensors, three magnetic field sensors, ten wireless APs, two differential amplifiers, two sigma-delta analog-to-digital converters, two digital extraction filters, three data isolators, a data collector, a servo amplifier, a baseline correction module, a storage server, a disk array, a PC (personal computer), three vibration exciters, three signal generators and three vibration tables;
the transmission medium part comprises optical fibers, an infrared channel, a wireless universal serial bus and first to third LonWorks buses;
output shafts of the three vibration exciters are connected with the three vibration tables in a one-to-one correspondence manner; the first accelerometer to be tested and the first standard accelerometer are both fixed on the table surface of the first vibration table, and the X axis of the first accelerometer to be tested and the X axis of the first standard accelerometer are both parallel to the output shaft of the first vibration exciter; the second accelerometer to be tested and the second standard accelerometer are both fixed on the table surface of the second vibration table, and the Y axis of the second accelerometer to be tested and the Y axis of the second standard accelerometer are both parallel to the output shaft of the second vibration exciter; the third accelerometer to be tested and the third standard accelerometer are both fixed on the table surface of the third vibration table, and the Z axis of the third accelerometer to be tested and the Z axis of the third standard accelerometer are both parallel to the output shaft of the third vibration exciter; the first vibration speed sensor and the second vibration speed sensor are both fixed on the table top of the first vibration table; the third vibration speed sensor and the fourth vibration speed sensor are fixed on the table top of the second vibration table; the fifth vibration speed sensor and the sixth vibration speed sensor are fixed on the table top of the third vibration table; the first temperature sensor, the first humidity sensor, the first air pressure sensor and the first magnetic field sensor are all fixed on the table top of the first vibrating table; the second temperature sensor, the second humidity sensor, the second air pressure sensor and the second magnetic field sensor are all fixed on the table top of the second vibrating table; the third temperature sensor, the third humidity sensor, the third air pressure sensor and the third magnetic field sensor are all fixed on the table top of the third vibrating table;
the three tested accelerometers are connected with a first wireless AP through optical fibers, the three standard accelerometers are connected with a second wireless AP through optical fibers, and the first wireless AP is wirelessly connected with the second wireless AP through an infrared channel; the three tested accelerometers and the three standard accelerometers jointly form branches of a tree-shaped topological structure, and the first wireless AP and the second wireless AP jointly form a trunk of the tree-shaped topological structure; the second wireless AP is connected with the first differential amplifier through an optical fiber; the first differential amplifier is connected with the first sigma-delta analog-to-digital converter through an optical fiber; the first sigma-delta analog-to-digital converter is connected with the first digital decimation filter through an optical fiber; the first digital decimation filter is connected with the first data isolator through an optical fiber; the first data isolator is connected with the data acquisition unit through an optical fiber;
the six vibration speed sensors are correspondingly connected with the third wireless AP, the fourth wireless AP and the eighth wireless AP one by one through optical fibers; the third to tenth wireless APs are wirelessly connected with the wireless universal serial bus, and the third to tenth wireless APs and the wireless universal serial bus form a bus type topological structure together; the ninth wireless AP and the tenth wireless AP are connected with the second differential amplifier through optical fibers; the second differential amplifier is connected with the second sigma-delta analog-to-digital converter through an optical fiber; the second sigma-delta analog-to-digital converter is connected with the second digital decimation filter through an optical fiber; the second digital decimation filter is connected with the second data isolator through an optical fiber; the second data isolator is connected with the servo amplifier through an optical fiber; the servo amplifier is connected with the data acquisition unit through an optical fiber;
the first temperature sensor, the first humidity sensor, the first air pressure sensor, the first magnetic field sensor and the third data isolator are all connected with a first LonWorks bus, and the first temperature sensor, the first humidity sensor, the first air pressure sensor, the first magnetic field sensor, the third data isolator and the first LonWorks bus form a bus type topological structure together; the second temperature sensor, the second humidity sensor, the second air pressure sensor, the second magnetic field sensor and the third data isolator are all connected with a second LonWorks bus, and the second temperature sensor, the second humidity sensor, the second air pressure sensor, the second magnetic field sensor, the third data isolator and the second LonWorks bus form a bus type topological structure; the third temperature sensor, the third humidity sensor, the third air pressure sensor, the third magnetic field sensor and the third data isolator are all connected with a third LonWorks bus, and the third temperature sensor, the third humidity sensor, the third air pressure sensor, the third magnetic field sensor, the third data isolator and the third LonWorks bus form a bus type topological structure together; the third data isolator is connected with the data acquisition unit through an optical fiber;
the data acquisition unit is connected with the baseline correction module through an optical fiber; the baseline correction module, the storage server, the disk array and the PC are connected end to end through optical fibers to form an annular topological structure; the three vibration exciters are connected with the servo amplifier through optical fibers, and the three vibration exciters and the servo amplifier form a star-shaped topological structure together; the three signal generators are all connected with the servo amplifier through optical fibers, and the three signal generators and the servo amplifier jointly form a star topology structure.
2. The accelerometer calibration system based on the hybrid topology according to claim 1, wherein: the temperature sensor adopts a digital temperature sensor; the humidity sensor adopts a digital humidity sensor; the air pressure sensor adopts a digital air pressure sensor; the magnetic field sensor adopts a digital magnetic field sensor; the differential amplifier adopts a low-noise and programmable-gain dual-channel differential amplifier; the sigma-delta analog-to-digital converter adopts a 24-bit sigma-delta analog-to-digital converter with high precision and multi-resolution; the digital decimation filter adopts a single-channel digital decimation filter with low power consumption; the optical fiber is a single mode optical fiber.
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| CN203981297U (en) * | 2014-08-02 | 2014-12-03 | 国网山西省电力公司大同供电公司 | Transmission line of electricity load temperature monitoring system based on bus type topological structure |
| CN210465476U (en) * | 2019-08-19 | 2020-05-05 | 中车长春轨道客车股份有限公司 | Acceleration sensor calibration system |
| CN210865076U (en) * | 2020-02-21 | 2020-06-26 | 胡方明 | Oil-break protection device of screw air compressor for coal mine |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1086389A1 (en) * | 1982-06-22 | 1984-04-15 | Ростовский Ордена Трудового Красного Знамени Государственный Университет | Acceleration meter sensitivity vector measuring method |
| US20080177492A1 (en) * | 2007-01-22 | 2008-07-24 | General Electric Company | Method and system for calibrating sensors |
| CN103048013A (en) * | 2012-12-25 | 2013-04-17 | 中北大学 | Automatic loading platform of micro-nano sensor under variable environment |
| CN203981297U (en) * | 2014-08-02 | 2014-12-03 | 国网山西省电力公司大同供电公司 | Transmission line of electricity load temperature monitoring system based on bus type topological structure |
| CN210465476U (en) * | 2019-08-19 | 2020-05-05 | 中车长春轨道客车股份有限公司 | Acceleration sensor calibration system |
| CN210865076U (en) * | 2020-02-21 | 2020-06-26 | 胡方明 | Oil-break protection device of screw air compressor for coal mine |
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