CN114915862A - Parallel data acquisition method and system based on wireless transmission - Google Patents
Parallel data acquisition method and system based on wireless transmission Download PDFInfo
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Abstract
The invention provides a parallel data acquisition method and a system based on wireless transmission, which comprises a plurality of wireless data acquisition units based on battery power supply, wherein each acquisition unit is bidirectionally accessed to a field server through a wireless module, and the server is linked with a system server through a local area network or a metropolitan area network. The system server sends an acquisition command to the field server through a local area network or a metropolitan area network, each acquisition device simultaneously receives the acquisition command through a wireless module, synchronous data acquisition is carried out on the vibration sensors connected with each acquisition device, and the acquisition commands are sent to the server after the synchronous data acquisition is finished, so that synchronous and parallel acquisition of multi-point vibration signals is guaranteed. The invention is suitable for the production field of large enterprises such as chemical industry, electric power, metallurgy, natural gas, farms and the like which have high explosion-proof requirements and are inconvenient to wire and unattended on the field, the storage and analysis of the sampled data are managed by the system processor, and the expansion of the system is facilitated.
Description
Technical Field
The invention relates to the technical field of remote data transmission processing, in particular to a parallel data acquisition method and a system based on wireless transmission.
Background
In many fields related to the national civilization, such as petrochemistry, metallurgy, electricity, natural gas, etc., the working state of large-scale equipment can be reflected by vibration signals, and the detection and processing of the vibration signals become more and more important. At present, the vibration signals are detected in a manual regular inspection mode, but the parallel and simultaneous detection of a plurality of vibration signals cannot be ensured; in addition, the fields have extremely high explosion-proof requirements, most production plants are built and put into production, the upgrading and reconstruction of equipment have extremely high requirements on field rewiring, and many places cannot meet the requirements on rewiring at all.
Relevant research work on vibration signal detection acceleration sensors is successively carried out by domestic scientific research units, certain achievements are obtained, and the acquisition and partial processing work of vibration information is realized. Some research units at home and abroad carry out some researches on parallel acquisition and numerical analysis of the vibration sensor, but the researches are all based on off-line processing at a computer end, and are inconvenient to install and use on site. Recent research shows that more parameters related to the running state of equipment can be obtained by simultaneously acquiring multi-point vibration signals on large-scale equipment; the problems of frequency, depth, precision and the like of acquisition are not thoroughly solved; especially, the problem of parallel acquisition is not effectively solved, so that more fault phenomena cannot be analyzed to a certain extent.
Disclosure of Invention
The present invention is directed to a method and a system for acquiring parallel data based on wireless transmission, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a parallel data acquisition method based on wireless transmission comprises the following steps:
acquiring multiple groups of parallel data on site;
dividing the parallel data into a plurality of parallel data lines according to the plurality of groups of parallel data, and processing and forwarding the data of the parallel data lines in an error correction and retransmission mode;
receiving the processed parallel data lines, processing the data of the parallel data lines in an error correction and retransmission mode, generating forwarding data and transferring out the forwarding data to finish the bidirectional transmission of commands and data;
and downloading the transferred forwarding data, analyzing the forwarding data, namely labeling the data exceeding the normal standard, and storing the analysis result.
Preferably, the number of the parallel data lines is at least 2, and the sampling frequency, the sampling precision and the sampling interval of each data line are the same.
The sets of parallel data in the field include, but are not limited to, temperature, intensity, and kurtosis.
Preferably, the step of processing the data of the parallel data lines in an error correction retransmission manner includes:
s1, receiving data;
s2, checking whether the check code added in the data is correct;
s3, if the check code is correct, checking whether the forward error correction code inserted in the data is correct;
s4, if the check code is wrong, requesting to upload data again, and repeating the steps S1 and S2;
s5, if the forward error correction coding is correct, checking whether the pseudo random number encryption of the data is correct;
s6, if the forward error correction coding is wrong, requesting to upload the data again, and repeating the steps S1, S2 and S3;
s7, if the pseudo random number is correctly encrypted, forwarding or transferring the data;
s8, if the pseudo-random number encryption is wrong, requesting to upload data again, and repeating the steps S1, S2, S3 and S5.
Preferably, the check code is based on a parity check code.
In order to achieve the purpose, the invention also provides the following technical scheme:
a wireless transmission based parallel data acquisition system comprising:
the sensing module is used for acquiring multiple groups of parallel data on site;
the acquisition module is used for dividing the data into a plurality of parallel data lines according to the plurality of groups of parallel data, and processing and forwarding the data of the parallel data lines in an error correction and retransmission mode;
the wireless module is used for receiving the processed parallel data lines, processing the data of the parallel data lines in an error correction and retransmission mode, generating forwarding data and outputting the forwarding data; and
and the field service module is used for downloading the transferred forwarding data, analyzing the forwarding data and storing an analysis result.
Preferably, the system further comprises:
the power supply module is used for supplying power to the sensing module, the acquisition module, the wireless module and the field service module;
the system service module is used for realizing data interaction with the field service module; and
and the industry service module is used for realizing data interaction with the system service module and has the functions of data storage, management, diagnosis analysis, alarm and the like.
Preferably, the sensing module is based on a single-axis, double-axis or three-axis acceleration sensor, the collecting module is based on a collector, the field service module is based on a field server, and the system service module is based on a system server.
Preferably, the collector comprises a central processing unit, and a battery detection and conversion module, a power circuit conversion module, an analog conditioning circuit module, an analog/digital conversion module, a battery, a CAN module and a wireless module which are connected with the central processing unit, wherein a RAM with a large capacity is arranged in the central processing unit for data caching, the analog conditioning circuit module converts vibration information obtained by the sensing module into an analog electric signal suitable for the requirement of the analog/digital conversion module, and the analog electric signal is converted into a discrete digital signal by the analog/digital conversion module and stored in the RAM in the central processing unit under the control of the central processing unit.
Preferably, the site server comprises a central processing unit, and a wireless transmission module, a LAN module and a battery which are connected with the central processing unit, the central processing unit is connected with the plurality of collectors by using the wireless module and is connected with the system server by using the LAN module, and the battery supplies power to the whole site server.
Compared with the prior art, the invention has the beneficial effects that:
compared with the existing data acquisition system, the system has obvious advantages, wide application prospect, simple and portable field equipment and easy installation; various settings meet the use requirements of different users; the concrete expression is as follows:
the invention adopts the remote transmission and control system, the data of the collector is transmitted to the server through the LAN, the transmission rate is high, the transmission of the field measured data under severe conditions is greatly facilitated, and the labor cost is reduced. In addition, the invention has strong applicability and can be widely applied to monitoring various high-frequency data.
According to the invention, an interactive design is adopted, and the server is used for controlling the collector and the vibration sensor, so that customized collection and transmission of data such as collection frequency, collection precision, collection interval, collection depth and the like are realized, and the customization of the data and the effectiveness of data transmission are improved.
According to the invention, the on-site server receives and analyzes the acquisition command, and issues the acquisition command in a broadcasting manner through the wireless module, and each acquisition device simultaneously receives the acquisition command through the wireless module and synchronously acquires data of the vibration sensors connected with the acquisition device under the control of the acquisition device. And after the data acquisition is finished, each acquisition unit sends the data to the server through the wireless module. Because the internal structures of the collectors are consistent, synchronous acquisition of the multi-point vibration signals is ensured. The parallel acquisition of data of a plurality of sensors is realized, and more possibilities are provided for the subsequent software analysis work; the upgrading and transformation matters are not needed to be considered within years.
The invention also adopts the methods of checking, correcting error, encrypting, uploading and decrypting data, thereby ensuring the reliability of data transmission at all levels.
Drawings
Fig. 1 is a schematic flow chart of a parallel data acquisition method based on wireless transmission according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a parallel data acquisition system based on wireless transmission according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another parallel data acquisition system based on wireless transmission according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a collector structure of a parallel data collection system based on wireless transmission according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a control board inside a collector of a parallel data collection system based on wireless transmission according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an acquisition board inside an acquisition device of a parallel data acquisition system based on wireless transmission according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a field server of a parallel data acquisition system based on wireless transmission according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of processing data of parallel data lines in an error correction and retransmission manner according to a parallel data acquisition method based on wireless transmission provided in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
referring to fig. 1 to 8, the present invention provides a technical solution:
a parallel data acquisition system based on wireless transmission is a remote control wireless parallel data acquisition system based on battery power supply, and mainly comprises a field part and a server part, wherein the field part mainly comprises a plurality of sets of vibration sensors, an acquisition device, a wireless module, a battery pack and a simple public field server. The server comprises an enterprise-level server arranged inside an enterprise and a main server arranged inside an industry, and the enterprise server and the industry server can be connected with a plurality of user terminals such as APPs. The collector is directly connected with the vibration sensor, the wireless module receives an instruction of the field server and controls and samples the sensor, the collected data are uploaded after the collection is completed, the power supply device supplies power to the vibration sensor, the collector and the wireless module, and the field server is in bidirectional connection with the collectors in a wireless mode and is connected with the enterprise server and the industry server through the internet.
Specifically, the vibration sensor can be an acceleration sensor which is currently universal and is 10-150 g, and a user can select a single shaft to at most three shafts according to needs. And a constant current source with 4-10 milliamperes is adopted for supplying power, and the power supply voltage is more than or equal to 11 volts. And the adaptation requirement of the universal vibration sensor is met.
Specifically, the collector mainly comprises a central processing unit, a constant current source circuit, a conditioning circuit, an analog/digital conversion module, a battery monitoring module (including a battery detection and conversion module, a power circuit conversion module and a constant current source module), a high-efficiency power module, a CAN protocol transmission module and a wireless (transmission) module in terms of hardware structure. The collector is powered by a 12-volt battery pack, and the battery pack can be an alkaline battery pack, a lithium battery pack or a solar battery pack. The system comprises a central processing unit, a CAN protocol unit, a data cache module and a data cache module, wherein the central processing unit is internally provided with a large-capacity RAM (random access memory) for data cache and is provided with the CAN protocol unit, and the central processing unit controls all other modules; the constant current source module supplies power to an external vibration sensor, and the conditioning circuit converts vibration information obtained by the sensor into an analog electric signal required by the adaptive die/digital conversion module; the analog/digital conversion module converts the analog electric signal into a discrete digital signal and stores the discrete digital signal into an RAM in the processor under the control of the central processing unit; the battery monitoring module monitors the residual electric quantity of the battery pack in real time, and automatically outputs an alarm signal to the central processing unit when the electric quantity is reduced to a certain degree; the high-efficiency power supply module supplies power to all circuits, and unnecessary power supplies of all modules are cut off in the sampling interval time so as to prolong the service time of the battery to the maximum extent.
Specifically, the on-site server mainly comprises a central processing unit, a wireless module, a LAN module and a high-efficiency power supply module on the basis of a hardware structure. The central processing unit is connected with the plurality of collectors by using a wireless module and is connected with the enterprise server by using an LAN module; the high-efficiency power supply module supplies power to the whole field server, and the voltage of the field server is 220V of alternating current.
Specifically, the power supply device of the sampler adopts a 12-volt battery pack for power supply, and can use an alkaline battery pack or a lithium battery pack. The on-site server directly uses alternating current for power supply, and the power conversion efficiency is higher than 85%.
Specifically, the analog/digital conversion module used by the collector can simultaneously collect information of at most four vibration sensors in parallel, and the sampled parameters can be adjusted in real time as required.
Specifically, the wireless transmission modules adopted by the collector and the field server use international ISM frequency band, and the data transmission rate can reach up to 250 Kbps. Wireless modules in the same area use the same frequency and different IDs to communicate; the wireless modules within different regions communicate using different frequencies.
Specifically, the current transformer sensing and isolation technology is utilized to perform differential conditioning on the output of the sensor, so as to reduce the influence of various noises on signals.
Specifically, the system uses a wireless transmission module to link with an upper server (a field server), the upper server sets main parameters of the acquisition module, and controls synchronous parallel acquisition of a plurality of acquisition systems. The data analysis work is completed by a system server with powerful functions, and the product function is convenient to upgrade.
The system of the invention is a wireless parallel data acquisition system based on battery power supply, which meets the requirements of the system on real-time performance and convenient wiring and can realize parallel data acquisition and transmission on a plurality of paths of vibration sensors, and specifically comprises the following components:
the field part of the system comprises a plurality of wireless data collectors based on battery power supply, each collector is bidirectionally connected with a common simple field server through a wireless module, and the field server is connected with the system server through a local area network or a metropolitan area network. The system server sends an acquisition command to the field server through a local area network or a metropolitan area network, the field server receives the acquisition command, analyzes the acquisition command, and sends the acquisition command in a broadcasting mode through the wireless module, and each acquisition device simultaneously receives the acquisition command through the wireless module and synchronously acquires data of the vibration sensors connected with the acquisition device under the control of the acquisition device. Because the internal structures of the collectors are consistent, the synchronism of multipoint vibration signal acquisition is ensured. And after the data acquisition is finished, each acquisition unit sends the data to the server through the wireless module. The invention provides a wireless parallel data acquisition system which is reasonable in design and has remote control, can flexibly adjust specific technical indexes such as sampling frequency, sampling precision, sampling depth, sampling interval and the like according to needs, and provides a good solution for parallel data acquisition of a multi-path vibration sensor; the method is suitable for production fields of large-scale enterprises such as chemical industry, electric power, metallurgy, natural gas and farms and the like which have high explosion-proof requirements, are inconvenient to wire and are unattended on the field. The storage and analysis of the sampled data are managed by the system processor. The system is expanded.
In the present invention, as shown in fig. 2-3, the servers include three levels, namely, on-site servers, enterprise (system) servers, and industrial servers. The management and control of data and the realization of other functions can be flexibly completed on an enterprise or industry server according to the needs of users. All collectors and servers at all levels use bidirectional data connection. The working parameters of the collector are set by an enterprise server or an industry server, and real-time modification is allowed. Time stamp information of data transmission between servers is used by the respective servers as a standard for time unification using network time.
The wireless parallel data acquisition system mainly comprises a field part and a rear end part, wherein the field part is formed by a vibration sensor, an acquisition device, a field server and a power supply device. The basic requirement of the system for the vibration sensors is that the system can collect a plurality of vibration sensors in parallel, and the data of the vibration sensors are directly accessed into the collector in a short distance. In consideration of the actual situation that wiring is inconvenient possibly on site, a large-capacity lithium battery pack is used for supplying power, under the premise that conditions are allowed, a solar battery can be used for supplying power to the vibration sensor and the collector, data transmission is carried out between the collector and the front-end server in a wireless mode, and the front-end server can directly use commercial power for supplying power. The server part is divided into three categories: the front-end server (namely the field server) is responsible for controlling and receiving the data of the collectors and is directly connected with the enterprise-level server through a local area network, and the enterprise server controls the work of each collector through the front-end server and carries out primary analysis on the field data uploaded by the collectors; the enterprise server can be provided with data analysis software or a user mobile phone APP according to needs; the industry server is used for storing relevant data and data of each enterprise in the whole industry on the basis of the function of the enterprise server, has high-level functions of a large database, an expert support system and the like, and is connected with the enterprise server through INTERNET. The mobile phone APP is mainly used for monitoring the system work in real time and outputting alarm information under an accident condition.
As shown in fig. 1, the present invention further provides a parallel data acquisition method based on wireless transmission, which includes the following steps:
s101, acquiring multiple groups of parallel data of a site;
s102, dividing the data into a plurality of parallel data lines according to the plurality of groups of parallel data, and processing and forwarding the data of the parallel data lines in an error correction and retransmission mode;
s103, receiving the processed parallel data lines, processing the data of the parallel data lines in an error correction and retransmission mode, generating forwarding data and transferring out;
s104, downloading the transferred forwarding data, analyzing the forwarding data, and storing an analysis result. The forwarded data which is transferred out is data uploaded by the sensor and comprises some diagnostic information such as temperature, intensity, kurtosis and the like, and the on-site server analyzes the primarily diagnosed data, marks the over-standard data and provides alarm information for the system server. The storage analysis result means that an SD card is arranged in the field server and used for storing data sent by the sensor and uploading the data to the system server.
The method can realize the synchronous parallel acquisition function of the multi-channel field data under the remote wireless control of the server, and adopts a processing mode of error correction, namely repeated uploading, thereby ensuring the reliability of data transmission at all levels. As further described below, as shown in fig. 8, one is to add a check code to the transmitted data, one is to add forward error correction coding, one is to encrypt and decrypt the data and upload and then decrypt it (pseudo-random number encryption), and the fourth is to require re-upload of the data if the first three have not been error corrected. The four methods are used simultaneously. The check code of the invention adopts parity check code, and has the check sum function: for example, for a data sequence x (1), x (2), …, x (N) of length N, the sum is determined:
In order to solve the problem that error cannot be corrected, the method of the present invention adopts forward error correction coding, which is extra coding inserted into original data according to a certain rule, and can automatically correct the error in the case of a small amount of transmission errors, such as: the receiving end utilizes the error control code element added in the sending code element sequence by the sending end, not only can find the error code, but also can recover the error code to the correct value. In the case of binary code elements, the position of an error code can be determined, which is equivalent to correcting the error code, and a two-dimensional parity check code is simple and commonly used.
The method of the invention adopts a method of encrypting, decrypting, uploading and then decrypting the data, namely pseudo-random number encryption, utilizes random numbers to transmit and keep secret for the data, and also has the checking function: pseudo-random number encryption is based on a simple principle: binary digit a is xor' ed twice with binary digit b and still equals a.
Two b are generated by the transmitting end and the receiving end respectively according to the same rule. B is a pseudo random number sequence which is normally used, and when the generation and calculation method of b is specified at the receiving and transmitting ends, the transmitting end only needs to transmit one key parameter for generating b
After receiving the parameter, the receiving end can accurately recover the sequence b, and then the receiving end will recover the sequence b
And carrying out exclusive or operation on the sequence b which is recovered by self, and recovering the original sequence a.
Another advantage of this approach is that this key parameter can be embedded in the sequence
Without authorization, it is difficult for a third party to recover b. Therefore, the method of the invention can ensure the reliability of data transmission at each level.
The collector mainly comprises a control board and a collecting board as shown in figures 4, 5 and 6. The control board mainly comprises 4 working elements, such as an ARM module, a wireless transmission module, a CAN module, a battery monitoring and converting module, and the like. The battery monitoring and converting module supplies power to the control board and all the acquisition boards, simultaneously monitors the actual capacity of the battery pack in real time, outputs an alarm signal to the ARM module when the capacity is lower than a set value, and reduces the power consumption to the greatest extent when all the acquisition boards are powered off in an acquisition intermission period. In order to reduce power consumption, the ARM module I and the wireless transmission module II are in a dormant working mode at ordinary times, and the wireless module II wakes up the ARM module I through interruption after receiving an acquisition command sent by a field server in a broadcasting mode. The ARM module is then the CAN module of the acquisition boards awakening in a broadcasting mode, and the software and hardware of the acquisition boards are completely the same, so that the time from awakening to acquisition CAN be strictly synchronous, and the synchronous acquisition function of the acquisition boards on a plurality of sensor data is realized.
The collector of the invention comprises 1-3 collecting plates, each collecting plate can be connected with 6 single-shaft vibration sensors at most or 2 three-shaft vibration sensors, each 3-shaft vibration sensor uses a set of collecting and control circuit, comprising: analog conditioning circuit module, A/D conversion module, ARM module, CAN module and power supply conversion circuit. The analog conditioning circuit module converts an output signal of the vibration sensor into an input signal suitable for the requirement of the analog/digital conversion module, the analog/digital conversion module CAN modify sampling frequency and collect the data according to the requirement, the ARM module controls the collected length and temporarily stores the collected result, the CAN module transmits the collected data to the ARM module on the control panel, and the power conversion circuit converts power provided by the control panel into various power required by each module of the collection panel. Under the control of the ARM module on the control panel, the ARM module on each acquisition panel simultaneously analyzes the command, and the same program is used for modifying the acquired parameters to control acquisition, so that the requirement of parallel acquisition is met. After the acquisition is finished, the acquired data is stored in respective RAM and is wirelessly controlled by the acquisition unit to be polled for uploading. The vibration detection sensor is suitable for a charge type vibration sensor which is powered by a constant current source of 4-10 milliamperes and ranges from 0.1g to 150 g.
The site server of the present invention is shown in fig. 7, and mainly includes 4 working elements, such as an ARM module, a wireless transmission module, an ethernet module, and a power supply module. The CAN (Ethernet) module communicates and controls the ARM module in a wired mode, the ARM module is connected with the enterprise server through a TCP/IP protocol, the wireless transmission module is connected with the wireless transmission module in the collector, and the power supply module directly converts the commercial power into power supplies required by all modules in the server.
The collector has other functions such as an interactive function, a data analysis function, a work log function, an emergency alarm function and the like on a software function module, wherein:
1. interactive function
The interactive function is that the data terminal of an enterprise server or an industry server controls the collector and the vibration sensor through the server to realize the customized collection and transmission of the multi-channel vibration data; as previously described, data from the vibration sensor may be wirelessly transmitted to the user's server via the communication module of the collector. Conversely, the user's server may also send instructions to the collector to control the collection and transmission. The content of the instruction can comprise the contents of acquisition frequency, acquisition depth, acquisition interval time, communication parameters, format and the like.
2. Data analysis function
Relatively simple data analysis functions are provided on the enterprise server. The method is mainly used for analyzing the vibration data in the enterprise, extracting relevant working state information, and outputting simple alarm and management information, pre-maintenance information and the like. An expert database for deep data mining, data analysis software, a diagnosis and alarm system and management information run on an industry server.
3. Work Log functionality
In order to know the operation status of the whole system, fault logs and network abnormality logs are periodically sent to a user. In addition, the system generates a power supply log through real-time monitoring of the power supply and sends the power supply log to the user regularly. Through the working log, the user can regularly check the system to ensure that the user makes proper judgment on the received data.
4. Emergency alert function
Through the function, some emergency situations which may occur in the operation process of the system can be timely notified to the user. Such as a system failure, or a battery in an abnormal state such as an undervoltage. In addition, the vibration data caused by the change of the working state can be obviously changed and an alarm is required to be given so as to control the whole production process in real time.
5. Other functions
Some important details are taken into account for the purpose of stable, practical, and convenient development. For example, in order to ensure the requirements of explosion prevention, corrosion prevention and the like on the site, all designs must meet the national explosion prevention regulations; in order to facilitate field maintenance and daily inspection, a self-checking function of the whole equipment is provided. In addition, based on the actual needs of different users, more convenient and practical functions are provided.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A parallel data acquisition method based on wireless transmission is characterized by comprising the following steps:
acquiring a plurality of groups of parallel data on site;
dividing the parallel data into a plurality of parallel data lines according to the plurality of groups of parallel data, and processing and forwarding the data of the parallel data lines in an error correction and retransmission mode;
receiving the processed parallel data lines, processing the data of the parallel data lines in an error correction and retransmission mode, generating forwarding data and transferring out;
and downloading the transferred forwarding data, analyzing the forwarding data, namely labeling the data exceeding the normal standard, and storing an analysis result.
2. The parallel data acquisition method based on wireless transmission as claimed in claim 1, wherein the number of the parallel data lines is at least 2, and the sampling frequency, the sampling precision and the sampling interval of each data line are the same.
3. The method as claimed in claim 1, wherein the multiple sets of parallel data in the field include temperature, intensity and kurtosis.
4. The method for collecting parallel data based on wireless transmission as claimed in claim 1, wherein the step of processing the data of the parallel data lines in an error correction retransmission manner comprises:
s1, receiving data;
s2, checking whether the check code added in the data is correct;
s3, if the check code is correct, checking whether the forward error correction code inserted in the data is correct;
s4, if the check code is wrong, requesting to upload the data again, and repeating the steps S1 and S2;
s5, if the forward error correction code is correct, checking whether the pseudo random number encryption of the data is correct;
s6, if the forward error correction coding is wrong, requesting to upload the data again, and repeating the steps S1, S2 and S3;
s7, if the pseudo random number encryption is correct, the data is forwarded or transferred out;
s8, if the pseudo-random number encryption is wrong, requesting to upload data again, and repeating the steps S1, S2, S3 and S5.
5. The method of claim 4, wherein the check code is based on a parity check code.
6. A parallel data acquisition system based on wireless transmission, comprising:
the sensing module is used for acquiring multiple groups of parallel data on site;
the acquisition module is used for dividing the data into a plurality of parallel data lines according to the plurality of groups of parallel data, and processing and forwarding the data of the parallel data lines in an error correction and retransmission mode;
the wireless module is used for receiving the processed parallel data lines, processing the data of the parallel data lines in an error correction and retransmission mode, generating forwarding data and outputting the forwarding data; and
and the field service module is used for downloading the transferred forwarding data, analyzing the forwarding data and storing an analysis result.
7. The system according to claim 6, further comprising:
the power supply module is used for supplying power to the sensing module, the acquisition module, the wireless module and the field service module;
the system service module is used for realizing data interaction with the field service module; and
and the industry service module is used for realizing data interaction with the system service module and has the functions of data storage, management, diagnosis analysis and alarm.
8. The system according to claim 7 or 8, wherein the sensing module is based on a single-axis, double-axis or triple-axis acceleration sensor, the acquisition module is based on a collector, the field service module is based on a field server, and the system service module is based on a system server.
9. The system according to claim 8, wherein the collector comprises a central processing unit, and a battery detection and conversion module, a power circuit conversion module, an analog conditioning circuit module, an analog/digital conversion module, a battery, a CAN module and a wireless module connected to the central processing unit, wherein the central processing unit has a RAM with a large capacity for data caching, the analog conditioning circuit module converts the vibration information obtained by the sensing module into an analog electrical signal suitable for the requirement of the analog/digital conversion module, and the analog/digital conversion module converts the analog electrical signal into a discrete digital signal which is stored in the RAM in the processor under the control of the central processing unit.
10. The system according to claim 8, wherein the site server comprises a central processing unit, and a wireless transmission module, a LAN module and a battery connected to the central processing unit, the central processing unit is connected to the plurality of collectors via the wireless transmission module and connected to the system server via the LAN module, and the battery supplies power to the entire site server.
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