CN102135436A - Data asynchronous acquisition system of fiber optic gyroscope - Google Patents
Data asynchronous acquisition system of fiber optic gyroscope Download PDFInfo
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- CN102135436A CN102135436A CN2010106111442A CN201010611144A CN102135436A CN 102135436 A CN102135436 A CN 102135436A CN 2010106111442 A CN2010106111442 A CN 2010106111442A CN 201010611144 A CN201010611144 A CN 201010611144A CN 102135436 A CN102135436 A CN 102135436A
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Abstract
The invention relates to the field of data acquisition and transmission of fiber optic gyroscopes, and particularly relates to an data asynchronous acquisition system of a fiber optic gyroscope. The system is used for the simultaneous data acquisition of a plurality of fiber optic gyroscopes, and is characterized in that: a data accumulation integration module is correspondingly connected with the fiber optic gyroscope; a first-order buffer shift register with a busy judging module is connected in a star form with the plurality of data accumulation integration modules; a data judging module is connected with the buffer shift register; a channel data memory corresponding to the data accumulation integration module is connected with the data judging module; and the plurality of channel data memories correspond to a dotting display module respectively. The advantage of the invention is that the system meets the national military standard of GJB2426-95 'Test method for fiber optic gyroscope', has a wide application scope, high efficiency, and stable and reliable data acquisition, and allows the increase and the decrease of the test number of the fiber optic gyroscope at any time during the test.
Description
Technical field
The present invention relates to optical fibre gyro data acquisition transmission field, specifically refer to a kind of optical fibre gyro data asynchronous collecting system.
Background technology
Fibre optic gyroscope is a kind of angular rate sensor, is widely used in the inertial navigation field, is the main sensors that is used for determining movable body spatial movement attitude at present.Optical fibre gyro working environment very severe, working environment for the simulation gyro, each gyro model machine all must be through high low-temperature test, for performance and the precision of evaluating fibre optic gyroscope accurately and efficiently, so be necessary existing fiber gyro data collection model is improved.
The predicament that traditional fiber gyro data collection (system) platform often faces is exactly when testing several gyro simultaneously, if nonsynchronous situation appears in the output cycle of gyro, the foundation of whole data chainning will be in waiting status or lose number.Even more serious is, if after having one or two gyros to break down suddenly in test process, whole data chainning can be in waiting status always, as can not in time finding, will waste a lot of manpowers, material resources influence the test of other normal gyros even influence the progress of whole project.
Summary of the invention
The objective of the invention is weak point according to above-mentioned existing situation, a kind of new optical fibre gyro data acquisition platform is provided, this platform is according to the desired data standard of national military standard GJB2426-95 " optical fibre gyro method of testing ", can provide normal data for different clients, more can effectively increase work efficiency.
The realization of the object of the invention is finished by following technical scheme:
A kind of optical fibre gyro data asynchronous collecting system, be used for a plurality of optical fibre gyros and carry out data acquisition simultaneously, it is characterized in that: described optical fibre gyro correspondence is connected with a data accumulation integrate module, the integrate module Y-connection that adds up of described plurality of data has a first-level buffer shift register with busy determination module, this buffering shift register is connected with the data judging module, described data judging module is connected with and the corresponding multi-channel data memory of described data accumulation integrate module, and each puts display modules to a dozen should be arranged described plurality of channels data-carrier store.
The default accumulative frequency of described data accumulation integrate module is 10 times, and is a hardwood with 20ms.
Described data accumulation integrate module, multi-channel data memory and get display module quantity ready and be three.
Be preset with a busy decision signal in the described busy determination module: a plurality of as described optical fibre gyro cycle datas are asynchronous, and the busy decision signal is low, and the data detrusion bit register of directly postponing is sent to the data judging module; The plurality of channels signal all arrives state simultaneously as described, and then the busy decision signal is high, sends frame by frame by default passage order, the data that do not send to deposit into the buffering shift register and enters waiting status.
Advantage of the present invention is: meet the desired data standard of national military standard GJB2426-95 " optical fibre gyro method of testing ", and applied widely, the efficient height, image data is reliable and stable, can test the optical fibre gyro of arbitrary period increase and decrease midway test quantity.
Summary of drawings
Fig. 1 is the platform process block diagram.
Concrete technical scheme
Feature of the present invention and other correlated characteristics are described in further detail by example below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As shown in Figure 1, label 1-19 represents respectively: optical fibre gyro 1,2,3, data accumulation integrate module 3,4,5, buffering shift register 7, busy determination module 8, host computer acquisition platform 9, passage determination module 10, multi-channel data memory 11,12,13 is got display module 14,15,16 ready, handshake module 17,18, the FPGA data integration sends platform 19.
Acquisition platform structure involved in the present embodiment is referring to Fig. 1, three optical fibre gyro 1,2,3 correspondences are connected with data accumulation integrate module 3,4,5,3,4,5 Y-connections of data accumulation integrate module have a first-level buffer shift register 7 with busy determination module 8, this buffering shift register 7 is connected with data judging module 10, described data judging module 10 is connected with multi-channel data memory 11,12,13, multi-channel data memory 11,12,13 each to a dozen some display modules 14,15,16 should be arranged.
In conjunction with the said apparatus structure, its concrete principle of work is as follows:
This platform is under the original state of start, and the FPGA data integration sends platform 19 and will shake hands with host computer acquisition platform 9, if shake hands successfully, this data acquisition can normally be carried out so.Be handshake module 17 and last handshake module 18 UNICOM of shaking hands, enter waiting status.
The output data of optical fibre gyro 1,2,3 is transferred to the data accumulation integrate module 3,4,5 of platform inside in the platform, the existing normal baud rate of PC serial ports is 115200, but the data of optical fibre gyro output baud rate may exceed this value far away under the different application environment.This platform inter-process adopts every circuit-switched data to add up ten times, and 20ms is that a hardwood outwards sends, and every circuit-switched data is all carried out channel arrangement before sending, and adds the sheet choosing; High two A15, A14 are the sheet bit selecting among the 16bit, and low 14 A13～A0 are the address.Two bit slice bit selectings are to the storage space gating of collection plate and three passage gyros, corresponding relation is according to the output data cycle of optical fibre gyro and the difference of baud rate, concrete accumulative frequency can freely be changed, this platform inter-process adopts every circuit-switched data to add up ten times, 20ms is that a hardwood outwards sends, and every circuit-switched data is all carried out channel arrangement before sending, and adds the sheet choosing, high two A15, A14 are the sheet bit selecting among the 16bit, and low 14 A13-A0 are the address.Two bit slice bit selectings are to the storage space gating of collection plate and three passage gyros, and corresponding relation is:
| 00 | Collection plate |
| 01 | |
| 10 | |
| 11 | |
A first-level buffer shift register 7 has been set up in platform inside, and 8 bit data are constantly moved into the registers group from afterbody or head.The data sequence frame head is judged, when arriving predetermined figure, judges whether follow-up data is frame head data.If, then this frame effective same period is according to the logic main points in the identifier word, carry out the integrated operation of data field, busy determination module 8 decision signals of peripheral hardware, if external fiber gyro 1,2, the cycle of 3 output data is not synchronous, then the data detrusion bit register 7 of directly postponing is delivered to host computer acquisition platform 9, busy determination module 8 decision signals are low, if outside 3 paths signals all arrive state simultaneously, then busy determination module 8 decision signals are high, send frame by frame by one to three by default passage order, the data that do not send to deposit into buffering shift register 7 and enter waiting status.
Data are delivered to host computer acquisition platform 9, carry out the passage chip selection signal by passage determination module 10 and judge, deliver to corresponding channel data register 11,12,13, simultaneously by getting display module 14,15,16 ready at the real-time data waveform of PC screen display.
Present embodiment properties of product and detection case are as follows:
Succeed in developing fine gyro data asynchronous collecting platform, can satisfy the demand that reply number of different types gyro data is gathered, can once test three groups of gyros, every group of gyro can be started shooting at arbitrary period, the test data of every group of gyro is separate, and whole data chainning is in waiting status or loses the generation of several phenomenons before having avoided, and this function is very convenient in engineering is used, need not to consider the output cycle and the on time of gyro, every group of gyro arbitrary period start all is the demonstration of starting from scratch.
Through detecting for a long time, confirm that this system's usable range is wide, data acquisition reliability height can be gathered the data of gyro under various complex environments.
Claims (4)
1. optical fibre gyro data asynchronous collecting system, be used for a plurality of optical fibre gyros and carry out data acquisition simultaneously, it is characterized in that: described optical fibre gyro correspondence is connected with a data accumulation integrate module, the integrate module Y-connection that adds up of described plurality of data has a first-level buffer shift register with busy determination module, this buffering shift register is connected with the data judging module, described data judging module is connected with and the corresponding multi-channel data memory of described data accumulation integrate module, and each puts display modules to a dozen should be arranged described plurality of channels data-carrier store.
2. a kind of optical fibre gyro data asynchronous collecting according to claim 1 system, it is characterized in that: the default accumulative frequency of described data accumulation integrate module is 10 times, and is a hardwood with 20ms.
3. a kind of optical fibre gyro data asynchronous collecting according to claim 1 system is characterized in that: described data accumulation integrate module, multi-channel data memory and get display module quantity ready and be three.
4. a kind of optical fibre gyro data asynchronous collecting according to claim 1 system, it is characterized in that being preset with a busy decision signal in the described busy determination module: a plurality of as described optical fibre gyro cycle datas are asynchronous, the busy decision signal is low, and the data detrusion bit register of directly postponing is sent to the data judging module; The plurality of channels signal all arrives state simultaneously as described, and then the busy decision signal is high, sends frame by frame by default passage order, the data that do not send to deposit into the buffering shift register and enters waiting status.
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Address after: 200436 No. 555 West Road, Zhabei District, Shanghai Patentee after: Shanghai Aoshi Control Technology Co., Ltd Address before: 200436 No. 555 West Road, Zhabei District, Shanghai Patentee before: SHANGHAI HENGTONG PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |