A nuclear safety-class seismic shutdown data redundant storage method and its system

Abstract

The present invention provides a nuclear safety class seismic shutdown data redundant storage method and its system, including the following steps: S1: The nuclear safety class seismic shutdown equipment uses a multi-channel A / D converter to synchronously convert the seismic acceleration signals collected by the accelerometer; S2: The data processor marks the data streams of the seismic acceleration signals converted by the multi-channel A / D converter respectively in odd and even orders; S3: The data processor recombines the data with odd labels and the data with even labels and stores them in different queues respectively. For the nuclear safety class seismic shutdown data redundant storage method and its system of the present invention, a single nuclear safety class seismic shutdown equipment can achieve redundant backup of the data-related acquisition and storage hardware modules.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic monitoring, and in particular, to a nuclear safety-class seismic shutdown data redundant storage method and system thereof. Background Art

[0002] Nuclear safety-class seismic shutdown equipment is an important safety-related equipment in nuclear power plants, and relevant regulations and specifications have given high safety-level requirements for nuclear safety-class seismic shutdown equipment. For nuclear safety-class seismic shutdown equipment, the reliability of its data acquisition and storage is an extremely important part of equipment safety assurance. In order to meet the requirements of relevant specifications, adopting a redundant scheme is an effective means. In order to achieve the safety performance of redundant backup of nuclear safety-class data, data redundant backup must be carried out on relevant hardware and the data itself, and neither can be missing; at the same time, due to the large amount of real-time seismic data and the functional limitations of nuclear safety-class seismic shutdown equipment, its storage space and data processing capabilities are limited, and it is impossible to store a large amount of data through complex compression algorithms.

[0003] Due to the high timeliness requirements and large amount of data in seismic data acquisition, there are defects in the existing storage schemes for seismic data of nuclear safety-class seismic shutdown equipment. The existing data storage schemes for nuclear safety-class seismic shutdown systems generally adopt two methods: one is off-site storage of seismic data, where the seismic shutdown equipment itself does not store seismic data, and the collected seismic data is transmitted in real time to a remote engineer station through an isolated network and stored remotely by a server. Using the powerful computing power and storage space of the server to store seismic data, in order to ensure the reliability of data transmission, this structure only realizes the seismic data transmission link structure of the data itself is complex. At the same time, introducing a non-nuclear safety-class network link equipment system into the nuclear safety-class system reduces the equipment safety level; the other method is to use multiple seismic shutdown data acquisition recorders to synchronously collect and store data and be redundant backups of each other. For example, Chinese Patent CN201910886353.9 discloses a seismic monitoring system and method for a research reactor, in which accelerometers arranged at various measurement points of the research reactor continuously monitor seismic motion signals and transmit them to corresponding recorders, and the corresponding recorders perform numerical processing on the seismic motion signals and transmit them to the alarm module of the monitoring cabinet. This method is actually a redundant backup of data-related hardware. Since the data sources belong to different devices, the obtained data has low correlation (if the data of one device is lost or the device is damaged, the data cannot be recovered from another device), and the purpose of redundant backup of the data itself is not achieved. At the same time, a single seismic shutdown system cannot perform complex data compression calculations, the storage capacity of the stored data is limited, and data export and backup need to be carried out regularly, which greatly increases the equipment cost and maintenance complexity. Summary of the Invention

[0004] The problem to be solved by the present invention is that the existing single seismic shutdown system cannot perform complex data compression calculations, has a limited data storage capacity, and requires regular data export and backup, which greatly increases the equipment cost and maintenance complexity.

[0005] To solve the above problems, on the one hand, the present invention provides a nuclear safety level seismic shutdown data redundant storage method, which includes the following steps:

[0006] S1: The nuclear safety level seismic shutdown equipment uses a multi-channel A / D converter to synchronously convert the seismic acceleration signals collected by the accelerometer.

[0007] S2: The data processor marks the data streams of the seismic acceleration signals converted by the multi-channel A / D converter according to odd and even orders respectively.

[0008] S3: The data processor recombines the data with odd labels and the data with even labels, and stores them in different queues respectively.

[0009] Preferably, in step S1,

[0010] the multi-channel A / D converter is a dual-channel A / D converter.

[0011] Preferably, in step S2, the marking according to odd and even orders specifically includes the following steps:

[0012] Assume a set of data is collected, and this set of data is marked as data A1, A2, A3, A4, A5, A6, A7, A8, A9, A10... according to odd and even orders.

[0013] Preferably, in step S3, the recombination of the data with odd labels and the data with even labels specifically includes the following steps:

[0014] The data A1, A2, A3, A4, A5, A6, A7, A8, A9, A10... are recombined into 2 groups of data A1, A3, A5, A7, A9... and A2, A4, A6, A8, A10... according to odd and even labels.

[0015] Preferably, in step S3, the following steps are further included:

[0016] After the two groups of data converted by the dual-channel A / D converter are split by the data processor, they are recombined into 4 groups of data queues, which are respectively marked as data queues DATA1, DATA2, DATA3, DATA4, and then the data queues with odd labels DATA1, DATA3 or the data queues with even labels DATA2, DATA4 in these 4 data queues are stored in 2 independent data memories respectively.

[0017] Preferably, in the step S1,

[0018] the sampling frequency of the seismic acceleration signal is 200 Hz.

[0019] On the other hand, the present invention also provides a system which adopts the above-mentioned nuclear safety class seismic trip data redundant storage method, wherein the system includes:

[0020] a multi-channel A / D converter, a filter, a data processor and a data memory;

[0021] The multi-channel A / D converter is used to convert the seismic acceleration signal collected by the accelerometer;

[0022] The filter is connected to the multi-channel A / D converter and is used to filter the converted seismic acceleration signal and send it to the data processor;

[0023] The data processor is connected to the data memory and is used to mark and split the filtered data in odd and even orders, recombine them into a new data queue, and send it to the data memory;

[0024] The data memory is used to store the recombined data.

[0025] Compared with the prior art, the nuclear safety class seismic trip data redundant storage method and system of the present invention have the following beneficial effects:

[0026] (1) For the nuclear safety class seismic trip data redundant storage method and system of the present invention, a single nuclear safety class seismic trip device can realize the redundant backup of the data-related acquisition and storage hardware modules;

[0027] (2) For the nuclear safety class seismic trip data redundant storage method and system of the present invention, due to the high integration and high consistency of the dual-channel A / D converter, the data of the two channels can be ensured to have strong correlation, realizing the redundant backup of the data-related hardware;

[0028] (3) For the nuclear safety class seismic trip data redundant storage method and system of the present invention, the data stream of the seismic acceleration signal collected by the nuclear safety class seismic trip device can be split into two independent groups of data in odd and even orders, and the two groups of data can be converted into each other according to the formula. Since only half of the data volume needs to be stored, the data compression ratio of this method is equivalent to 50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a flow chart of the nuclear safety class seismic trip data redundant storage method of the present invention;

[0030] Figure 2 Schematic diagram of the nuclear safety class seismic shutdown data redundant storage system of the present invention. Specific implementation manners

[0031] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description will be given to specific embodiments of the present invention with reference to the accompanying drawings.

[0032] Embodiment 1

[0033] Provide a nuclear safety class seismic shutdown data redundant storage method, as Figure 1 shown, which includes the following steps:

[0034] S1: The nuclear safety class seismic shutdown equipment uses a multi-channel A / D converter to synchronously convert the seismic acceleration signals collected by the accelerometer;

[0035] S2: The data processor marks the data streams of the seismic acceleration signals converted by the multi-channel A / D converter in odd and even orders respectively;

[0036] S3: The data processor recombines the data with odd labels and the data with even labels, and stores them in different queues respectively.

[0037] Through the above steps, a single nuclear safety class seismic shutdown equipment can achieve redundant backup of the data-related acquisition and storage hardware modules.

[0038] Among them, in the step S1,

[0039] The multi-channel A / D converter is a dual-channel A / D converter.

[0040] Due to the high integration and high consistency of the dual-channel A / D converter, it can ensure that the data of the two channels have strong correlation and achieve redundant backup of the data-related hardware.

[0041] Among them, in the step S2, the marking in odd and even orders specifically includes the following steps:

[0042] Assume that a set of data is collected, and this set of data is marked as data A1, A2, A3, A4, A5, A6, A7, A8, A9, A10... in odd and even orders.

[0043] Marking in odd and even orders is for better data splitting in the follow-up.

[0044] Among them, in the step S3, the recombination of the data with odd labels and the data with even labels specifically includes the following steps:

[0045] The data A1, A2, A3, A4, A5, A6, A7, A8, A9, A10... are recombined into two groups of data A1, A3, A5, A7, A9... and A2, A4, A6, A8, A10... according to odd-numbered and even-numbered labels.

[0046] The data with odd-numbered labels and the data with even-numbered labels are split and recombined into two groups of data respectively.

[0047] Among them, in the step S3, the following steps are further included:

[0048] After the two groups of data converted by the dual-channel A / D converter are split by the data processor, they are recombined into four data queues, which are respectively marked as data queues DATA1, DATA2, DATA3, DATA4. Then, the data queues DATA1, DATA3 with odd-numbered labels or the data queues DATA2, DATA4 with even-numbered labels in these four data queues are respectively stored in two independent data memories.

[0049] The data of one channel are recombined to form two groups of data queues, and the dual-channel A / D converter finally forms four groups of data queues.

[0050] Among them, in the step S1,

[0051] The sampling frequency of the seismic acceleration signal is 200 Hz.

[0052] According to the nuclear power plant seismic-related specifications, the seismic data sampling frequency is 200 Hz, while the frequency band of the destructive seismic signal is generally within 1 - 10 Hz. There is a large frequency band gap between the sampling frequency and the destructive seismic signal. According to the continuity of the seismic waveform and the smoothness characteristics in the low-frequency region, when data is collected at a sampling rate of 200 Hz, there is a good linear relationship between three consecutive data, which can be expressed according to formula (1):

[0053] A i =(A i-1 +A i+1 ) / 2 (1)

[0054] In formula (1), A i represents the i-th data value, and A i-1 , A i+1 respectively represent the two adjacent data values before and after A i . It can be seen from formula (1) that the data stream of the seismic acceleration signal collected by the nuclear safety-class seismic shutdown equipment can be split into two independent groups of data according to odd and even numbers, and the two groups of data can be converted into each other according to formula (1). Since only half of the data volume needs to be stored, it is equivalent that the data compression ratio of this method is 50%.

[0055] In this way, the method in this embodiment realizes the correlation of data and the redundancy of data-related hardware through the acquisition and conversion of a multi-channel A / D converter, and realizes a 50% data storage compression ratio through the linear characteristic of the data frequency band.

[0056] Embodiment 2

[0057] A system is provided, which adopts the nuclear safety-class seismic shutdown data redundant storage method as described in Embodiment 1, as Figure 2 shown, wherein the system includes:

[0058] A multi-channel A / D converter, a filter, a data processor, and a data memory;

[0059] The multi-channel A / D converter is used to convert the seismic acceleration signal collected by the accelerometer;

[0060] The filter is connected to the multi-channel A / D converter and is used to filter the converted seismic acceleration signal and send it to the data processor;

[0061] The data processor is connected to the data memory and is used to mark and split the filtered data in odd and even orders, recombine it into a new data queue, and send it to the data memory;

[0062] The data memory is used to store the recombined data.

[0063] In this way, the system in this embodiment realizes the correlation of data through the acquisition and conversion of a multi-channel A / D converter, and the data is split into an odd queue and an even queue by the data processor and sent to the corresponding data memories for storage respectively, realizing a 50% data storage compression ratio.

[0064] It should be understood that the parts not elaborated in detail in this specification are all prior arts.

[0065] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A nuclear safety class seismic shutdown data redundant storage method, characterized in that, It includes the following steps: S1: The nuclear safety class seismic shutdown equipment uses a multi-channel A / D converter to synchronously convert the seismic acceleration signals collected by the accelerometer; S2: The data processor marks the data streams of the seismic acceleration signals converted by the multi-channel A / D converter according to odd and even orders respectively; S3: The data processor recombines the data with odd labels and the data with even labels and stores them in different queues respectively.

2. The nuclear safety class seismic shutdown data redundant storage method according to claim 1, wherein In step S1, the multi-channel A / D converter is a dual-channel A / D converter.

3. The nuclear safety class seismic shutdown data redundant storage method according to claim 1, characterized in that In step S3, it further includes the following steps: After the two groups of data converted by the dual-channel A / D converter are split by the data processor, they are recombined into 4 data queues, which are respectively marked as data queues DATA1, DATA2, DATA3, and DATA4. Then, the data queues with odd labels DATA1 and DATA3 or the data queues with even labels DATA2 and DATA4 in these 4 data queues are respectively stored in 2 independent data memories.

4. The redundant storage method for nuclear safety class seismic shutdown data according to claim 1, characterized in that In step S1, the sampling frequency of the seismic acceleration signal is 200Hz.

5. A system adopting the nuclear safety class seismic shutdown data redundant storage method according to any one of claims 1 to 4, characterized in that, The system includes: a multi-channel A / D converter, a filter, a data processor, and a data memory; the multi-channel A / D converter is used to convert the seismic acceleration signals collected by the accelerometer; the filter is connected to the multi-channel A / D converter and is used to filter the converted seismic acceleration signals and send them to the data processor; the data processor is connected to the data memory and is used to mark and split the filtered data according to odd and even orders, recombine them into new data queues, and send them to the data memory; the data memory is used to store the recombined data.

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