CN101437308B - Self-repairing wireless strain sensing network system and implementing method thereof - Google Patents
Self-repairing wireless strain sensing network system and implementing method thereof Download PDFInfo
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Abstract
The invention discloses a self-repairing wireless strain sensing network system and a realization method thereof. The system comprises a redundancy module, a failure detection and diagnosis module, a redundancy dynamic reconfiguration module, a failure detection signal wire, a failure diagnosis signal wire, a strain bridge circuit, a preamplification module, a low-pass filtering module, a communication module and a power management module, wherein the redundancy module comprises a preamplification redundancy module, a low-pass filtering redundancy module, a communication redundancy module and a power management redundancy module; the failure detection and diagnosis module consists of a failure diagnosis circuit and a microprocessor which are connected in series; the redundancy dynamic reconfiguration module consists of a control module and a programmable array; and the programmable array comprises four I/O modules, four redundancy I/O modules, four switches S and a preamplification functional unit. The method adopts the functional unit in the field programmable array and a redundancy switching module for redundancy to realize self repairing of failed nodes. The system and the method have the advantages of maintaining the performance of the wireless sensing network and prolonging the service life of the network.
Description
Technical field
The present invention relates to a kind of wireless selfreparing sensing network system and its implementation, relate in particular to a kind of self-repairing wireless strain sensing network system and its implementation.
Background technology
Concerning many large scale structures (as build a bridge, aircraft etc.), it is necessary monitoring its health status in real time, and wherein strain is an important parameters.Adopt the wired mode of tradition that structural health is monitored, not only wiring is loaded down with trivial details, and a large amount of wirings can increase the heavy burden of monitoring target, and wireless sensor network is to have supplied good methods for the status monitoring of realizing large scale structure, can reduce the increase of the construction weight that is brought by lead-in wire greatly.Wireless sensor network is a kind of intelligent distributed monitoring network, by a large amount of that freely distribute, have calculate and the sensor node of communication function by the communication for coordination of self-organizing mode to finish the intelligent network system of specific function, have highly reliable, easily dispose and advantage such as can expand, be one of emphasis direction of current research.
At present, wireless strain sensing device network is widely used in the monitoring of geographical environments such as the strain monitoring of large scale structure (as bridge, dam, aircraft) and earthquake etc., to grasp the ruuning situation and the environmental aspect of structure.Because operational environment is comparatively complicated usually, uncertain factor is a lot, and the strain transducer node is subjected to external interference easily and may causes communication disruption, hardware fault, depleted of energy and make node failure, normally monitoring of influence, and serious also can be accidents caused.In addition, comparatively disperse and the restriction of operational environment, can not safeguard even that to the maintenance of strain sensing network system is very difficult the robustness of therefore studying wireless strain sensing device network is an important directions of its research because the strain sensing node distributes.
Current, the hardware of existing wireless strain sensing device network node is all fixed, and the strain sensing network just again can not change its hardware configuration after deploying.Under the failure conditions that hinder for some reason at the strain sensing network node, reason such as depleted of energy causes, existing strain sensing node can't work on, and the strain sensing network can only be given up this failure node, thereby causes the reduction of monitored density, even blind spot may appear monitoring, have influence on monitoring accuracy.Therefore independently to detect and repair fault most important for the strain sensing network.
At present, the structure of electronic system becomes increasingly complex, if system breaks down, traditional fault-tolerant and systemic-function restoration methods is difficult to realize.And bionic hardware can be realized the self-regeneration of circuit local fault, and programmable array is because its dynamic restructuring characteristic provides new means and platform for realizing system's selfreparing.Since the notion of engineering college of Swiss Confederation proposition bionic hardware in 1992, bionical selfreparing has become one of domestic and international research focus, scientific research institution such as the U.S., Britain is obtaining many progress aspect theoretical and the application foundation, domestic also have many scientific research institutions to carry out correlative study, but bionical selfreparing is used for the research or the blank of wireless strain sensing network system.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of self-repairing wireless strain sensing network system and its implementation at the defective that prior art exists.
Self-repairing wireless strain sensing network system of the present invention, it is characterized in that comprising redundant module, the fault detection and diagnosis module, redundant dynamic restructuring module, the fault detection signal line, the fault diagnosis signal line, the strain bridge circuit, pre-amplifying module, low-pass filtering module, communication module and power management module, wherein redundant module comprises preposition amplification redundant module, the low-pass filtering redundant module, communication redundant module and power management redundant module, the fault detection and diagnosis module is made up of fault diagnosis circuit serial connection microprocessor, redundant dynamic restructuring module is made up of control module and programmable array, and programmable array comprises four I/O modules, four redundant I/O modules, four switch S and preposition enlarging function unit; The input of the output termination pre-amplifying module of strain bridge circuit, the output of pre-amplifying module, the output of low-pass filtering module, the output of communication module and the output of power management module connect the input of fault diagnosis circuit respectively by the fault detection signal line, the output of fault diagnosis circuit by the fault diagnosis signal line respectively with pre-amplifying module, low-pass filtering module, communication module and power management module are electrically connected, the input of the output termination control module of microprocessor, the input of the output termination programmable array of control module, preposition amplification acquisition module is connected in series an I/O module successively, first switch S 1, redundant module is gathered in the first redundant I/O module and preposition amplification, preposition amplification acquisition function unit is electrically connected with an I/O module, low-pass filtering module is connected in series the 2nd I/O module successively, second switch S2, second redundant I/O module and the low-pass filtering redundant module, communication module is connected in series the 3rd I/O module successively, the 3rd switch S 3, triple redundance I/O module and communication redundant module, power management module are connected in series the 4th I/O module successively, the 4th switch S 1, the 4th redundant I/O module and communication redundant module.
The implementation method of described self-repairing wireless strain sensing network system is characterized in that comprising the steps:
(1) test signal that microprocessor is sent exports pre-amplifying module, low-pass filtering module, communication module and power management module respectively to through fault diagnosis circuit, fault diagnosis signal line successively;
(2) adopt fault diagnosis circuit to receive the preamplification signal of pre-amplifying module output, the low-pass filter signal of low-pass filtering module output, the communication signal of communication module output and the power supply signal of power management module output, preamplification signal, low-pass filter signal, communication signal and power supply signal are obtained detection signal through fault diagnosis circuit by the fault detection signal line;
(3) adopt the described detection signal of microprocessor receiving step (2) and the reference signal of storing in above-mentioned detection signal and the microprocessor relatively obtained the actual error signal: when the fiducial error signal that the actual error signal is stored in less than microprocessor, the then no abnormal step (1) of returning; The fiducial error signal of storing in greater than microprocessor when the actual error signal, the automatic repair signal that unusual microprocessor output corresponding failure unit is then arranged, the pre-amplifying module that trouble unit promptly breaks down, low-pass filtering module, communication module or power management module;
(4) the automatic repair signal with the described corresponding failure of step (3) unit obtains shutoff signal through control module;
(5) adopt the described shutoff signal of programmable gate array receiving step (3):
When pre-amplifying module breaks down, then programmable array cuts off being connected of preposition amplification acquisition module and wireless strain sensing network and will pass preposition amplification by closed first switch S 1 by an I/O module and gathers redundant module and insert radio sensing network or preposition enlarging function unit is inserted radio sensing network by an I/O module;
When low-pass filtering module breaks down, then programmable array cut off being connected of low-pass filtering module and wireless strain sensing network by the 2nd I/O module and by closed second switch S2 with low-pass filtering redundant module access radio sensing network;
When communication module breaks down, then programmable array cut off being connected of communication module and wireless strain sensing network by the 3rd I/O module and by closed the 3rd switch S 3 with communication redundant module access radio sensing network;
When power management module breaks down, then programmable array is cut off the electricity supply being connected of administration module and wireless strain sensing network and the power management redundant module is inserted radio sensing network by closed the 4th switch S 4 by the 4th I/O module.
Along with the continuous development of embedded research, field programmable gate array provides possibility for solving the dynamic restructuring problem.Field programmable gate array inside provides a lot of element resources, and such as amplifier, filter, gate, switch arrays etc., the value of each element and mutual annexation are controlled by configuration data, to realize the required circuit function of user.Field programmable gate array has integrated level height, low in energy consumption, advantage such as configuration is convenient, uses more and more widely.Therefore, adopt field programmable gate array to realize that the radio sensing network node dynamic restructuring is very convenient.But for the radio sensing network node of high-precision requirement,, be necessary to utilize redundant module,, realize the dynamic restructuring and the selfreparing of node in conjunction with programmable array owing to field programmable gate array internal amplifier, filter can not meet the demands.
Advantage of the present invention is to carry out real time fail monitoring and bionical selfreparing to the radio sensing network node under the various environment: (1) provides efficient, stable malfunction monitoring of node and selfreparing scheme, is convenient to the reconfiguring of radio sensing network under the adverse circumstances; (2) node selfreparing software is to implant in advance in the node memory, has accomplished that soft or hard is integrated, can extract fault automatically, realizes automatically repairing; (3) improved that node runs into Changes in weather and environmental impact and the situation that lost efficacy, expanded the scope of application of radio sensing network node, made it be more suitable for practical engineering application.
Description of drawings
Fig. 1: the hardware module figure of conventional radio sensing network node operational module;
Fig. 2: overall structure figure of the present invention;
Fig. 3: the bionical selfreparing operational flow diagram when being example with wireless strain sensing network node acquisition module.
Embodiment
As shown in Figure 1.The hardware module main modular of conventional radio sensing network node comprises sensor acquisition module (being made up of strain bridge circuit, pre-amplifying module, low-pass filtering module), power management module (forming) by power supply and accurate Voltage stabilizing module, data processing module (comprising fault diagnosis circuit, microprocessor that A/D change-over circuit and peripheral circuit are formed) and communication module (forming) by memory and radio circuit.
As shown in Figure 2.Self-repairing wireless strain sensing network system of the present invention, it is characterized in that comprising redundant module, the fault detection and diagnosis module, redundant dynamic restructuring module, the fault detection signal line, the fault diagnosis signal line, the strain bridge circuit, pre-amplifying module, low-pass filtering module, communication module and power management module, wherein redundant module comprises preposition amplification redundant module, the low-pass filtering redundant module, communication redundant module and power management redundant module, the fault detection and diagnosis module is made up of fault diagnosis circuit serial connection microprocessor, redundant dynamic restructuring module is made up of control module and programmable array, and programmable array comprises four I/O modules, four redundant I/O modules, four switch S and preposition enlarging function unit; The input of the output termination pre-amplifying module of strain bridge circuit, the output of pre-amplifying module, the output of low-pass filtering module, the output of communication module and the output of power management module connect the input of fault diagnosis circuit respectively by the fault detection signal line, the output of fault diagnosis circuit by the fault diagnosis signal line respectively with pre-amplifying module, low-pass filtering module, communication module and power management module are electrically connected, the input of the output termination control module of microprocessor, the input of the output termination programmable array of control module, preposition amplification acquisition module is connected in series an I/O module successively, first switch S 1, redundant module is gathered in the first redundant I/O module and preposition amplification, preposition amplification acquisition function unit is electrically connected with an I/O module, low-pass filtering module is connected in series the 2nd I/O module successively, second switch S2, second redundant I/O module and the low-pass filtering redundant module, communication module is connected in series the 3rd I/O module successively, the 3rd switch S 3, triple redundance I/O module and communication redundant module, power management module are connected in series the 4th I/O module successively, the 4th switch S 1, the 4th redundant I/O module and communication redundant module.
The implementation method of described self-repairing wireless strain sensing network system is characterized in that comprising the steps:
(1) test signal that microprocessor is sent exports pre-amplifying module, low-pass filtering module, communication module and power management module respectively to through fault diagnosis circuit, fault diagnosis signal line successively;
(2) adopt fault diagnosis circuit to receive the preamplification signal of pre-amplifying module output, the low-pass filter signal of low-pass filtering module output, the communication signal of communication module output and the power supply signal of power management module output, preamplification signal, low-pass filter signal, communication signal and power supply signal are obtained detection signal through fault diagnosis circuit by the fault detection signal line;
(3) adopt the described detection signal of microprocessor receiving step (2) and the reference signal of storing in above-mentioned detection signal and the microprocessor relatively obtained the actual error signal: when the fiducial error signal that the actual error signal is stored in less than microprocessor, the then no abnormal step (1) of returning; The fiducial error signal of storing in greater than microprocessor when the actual error signal, the automatic repair signal that unusual microprocessor output corresponding failure unit is then arranged, the pre-amplifying module that trouble unit promptly breaks down, low-pass filtering module, communication module or power management module;
(4) the automatic repair signal with the described corresponding failure of step (3) unit obtains shutoff signal through control module;
(5) adopt the described shutoff signal of programmable gate array receiving step (3):
When pre-amplifying module breaks down, then programmable array cuts off being connected of preposition amplification acquisition module and wireless strain sensing network and will pass preposition amplification by closed first switch S 1 by an I/O module and gathers redundant module and insert radio sensing network or preposition enlarging function unit is inserted radio sensing network by an I/O module;
When low-pass filtering module breaks down, then programmable array cut off being connected of low-pass filtering module and wireless strain sensing network by the 2nd I/O module and by closed second switch S2 with low-pass filtering redundant module access radio sensing network;
When communication module breaks down, then programmable array cut off being connected of communication module and wireless strain sensing network by the 3rd I/O module and by closed the 3rd switch S 3 with communication redundant module access radio sensing network;
When power management module breaks down, then programmable array is cut off the electricity supply being connected of administration module and wireless strain sensing network and the power management redundant module is inserted radio sensing network by closed the 4th switch S 4 by the 4th I/O module.
Workflow of the present invention is: node sensing collecting unit links to each other with strain transducer, and the bridge that causes by inner bridge measurement strain is pressed and is changed, signal is via amplifying, being carried out analog-to-digital conversion and sent data processing unit with the result by ADC after the filtering, the strain value that data processing unit obtains measuring send communication unit, and communication unit is pressed wireless network protocol with data and sent to bunch head or base station.
The pre-amplifier unit of these two modules, low-pass filter unit are adopted the CAB (programmable analog unit) that provides in the AN231E04 programmable analog array (FPAA) of AN23X series of Anadigm company as standby redundancy, accurate voltage regulation unit adopts the design of the hardware backup redundancy of same components to design its bionical self-repairing system, as shown in Figure 2.Microprocessor adopts the MCU chip microcontroller.
FPAA local array state realizes by patterned circuit design insturment, and the circuit structure of being made by this design tool can be used as hardware language and is written into FPAA and finishes function setting.For by monolithic processor controlled FPAA, adopt patterned programmed method unrealistic.At this kind situation, this patterned design tool provides C code Core Generator, utilizes this instrument, can generate the C code, for the C language call.By calling this code, both can change circuit parameter, also can change circuit topology, this dynamic restructuring for node provides convenience.
Narrate workflow of the present invention in conjunction with Fig. 1 to Fig. 3:
A.) microprocessor (single-chip microcomputer) output of reading the sensing acquisition module;
B.) judge whether sensing data is unusual, as normally, repeating step A, unusual as data, send warning message, simultaneously, single-chip microcomputer sends control command to field programmable gate array, cuts off the sensing acquisition module, continues next step;
C.) single-chip microcomputer reads accurate Voltage stabilizing module output voltage, judges whether accurate Voltage stabilizing module output voltage deviation is excessive, if big, then control programmable array and switches to standby accurate voltage regulation unit;
D.) the switch test signal is to the A/D converter input, and microprocessor reads data behind the A/D converter;
E.) compare A/D converter result and standard signal, judge whether A/D converter is normal, as normally, continues next step, otherwise the A/T converter disorder is declared this node failure, finish diagnosis and repair process;
F.) standard signal is connected to the pre-amplifying module input, switches amplifying signal, gather this data, judge the pre-amplifying module operating state, fault is arranged, write down this fault message as pre-amplifying module to Chip Microcomputer A/D transducer pin;
G.) the test frequency signal with single-chip microcomputer output is connected to the low-pass filtering module input, switch low-pass filtering module and output signal to Chip Microcomputer A/D transducer pin, gather this signal line frequency analysis of spectrum of going forward side by side, judge the low-pass filtering module operating state, as unusually, write down this fault message;
H) according to fault message, the configuration field programmable gate array with the disabling unit excision, is replaced master unit with the respective redundant unit, and the reconstruct node circuit changes steps A over to repairing the back state.
Claims (2)
1. self-repairing wireless strain sensing network system, it is characterized in that comprising redundant module, the fault detection and diagnosis module, redundant dynamic restructuring module, the fault detection signal line, the fault diagnosis signal line, the strain bridge circuit, pre-amplifying module, low-pass filtering module, communication module and power management module, wherein redundant module comprises preposition amplification redundant module, the low-pass filtering redundant module, communication redundant module and power management redundant module, the fault detection and diagnosis module is made up of fault diagnosis circuit serial connection microprocessor, redundant dynamic restructuring module is made up of control module and programmable array, and programmable array comprises four I/O modules, four redundant I/O modules, four switch S and preposition enlarging function unit; The input of the output termination pre-amplifying module of strain bridge circuit, the output of pre-amplifying module, the output of low-pass filtering module, the output of communication module and the output of power management module connect the input of fault diagnosis circuit respectively by the fault detection signal line, the output of fault diagnosis circuit by the fault diagnosis signal line respectively with pre-amplifying module, low-pass filtering module, communication module and power management module are electrically connected, the input of the output termination control module of microprocessor, the input of the output termination programmable array of control module, pre-amplifying module is connected in series an I/O module successively, first switch S 1, the first redundant I/O module and preposition amplification redundant module, preposition enlarging function unit is electrically connected with an I/O module, low-pass filtering module is connected in series the 2nd I/O module successively, second switch S2, second redundant I/O module and the low-pass filtering redundant module, communication module is connected in series the 3rd I/O module successively, the 3rd switch S 3, triple redundance I/O module and communication redundant module, power management module are connected in series the 4th I/O module successively, the 4th switch S 4, the 4th redundant I/O module and communication redundant module.
2. the implementation method based on the described self-repairing wireless strain sensing network system of claim 1 is characterized in that comprising the steps:
(1) test signal that microprocessor is sent exports pre-amplifying module, low-pass filtering module, communication module and power management module respectively to through fault diagnosis circuit, fault diagnosis signal line successively;
(2) adopt fault diagnosis circuit to receive the preamplification signal of pre-amplifying module output, the low-pass filter signal of low-pass filtering module output, the communication signal of communication module output and the power supply signal of power management module output, preamplification signal, low-pass filter signal, communication signal and power supply signal are obtained detection signal through fault diagnosis circuit by the fault detection signal line;
(3) adopt the described detection signal of microprocessor receiving step (2) and the reference signal of storing in above-mentioned detection signal and the microprocessor relatively obtained the actual error signal: the fiducial error signal of storing in less than microprocessor when the actual error signal, then no abnormal, return step (1); The fiducial error signal of storing in greater than microprocessor when the actual error signal, then have unusual, the automatic repair signal of microprocessor output corresponding failure unit, the pre-amplifying module that trouble unit promptly breaks down, low-pass filtering module, communication module or power management module;
(4) the automatic repair signal with the described corresponding failure of step (3) unit obtains shutoff signal through control module;
(5) adopt the described shutoff signal of programmable gate array receiving step (4):
When pre-amplifying module breaks down, then programmable array cuts off being connected of pre-amplifying module and wireless strain sensing network by an I/O module and by closed first switch S 1 preposition amplification redundant module is inserted radio sensing network or preposition enlarging function unit is passed through I/O module access radio sensing network;
When low-pass filtering module breaks down, then programmable array cut off being connected of low-pass filtering module and wireless strain sensing network by the 2nd I/O module and by closed second switch S2 with low-pass filtering redundant module access radio sensing network;
When communication module breaks down, then programmable array cut off being connected of communication module and wireless strain sensing network by the 3rd I/O module and by closed the 3rd switch S 3 with communication redundant module access radio sensing network;
When power management module breaks down, then programmable array is cut off the electricity supply being connected of administration module and wireless strain sensing network and the power management redundant module is inserted radio sensing network by closed the 4th switch S 4 by the 4th I/O module.
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| CN103727977A (en) * | 2013-12-20 | 2014-04-16 | 常州大学 | Environment monitor of self-repairing photovoltaic power generation monitoring system and achieving method of environment monitor |
| US10057388B2 (en) * | 2015-07-27 | 2018-08-21 | The Boeing Company | System and method for selecting a communication network in a sensor network |
| CN105259759B (en) * | 2015-10-23 | 2018-08-31 | 中国运载火箭技术研究院 | A kind of aircraft electrical system reconfigurable method of intelligence plug and play |
| CN110687886B (en) * | 2019-09-16 | 2020-11-03 | 上海航天控制技术研究所 | Fault diagnosis and reconstruction method of swing type sailboard driving system |
| CN114999841A (en) * | 2022-06-08 | 2022-09-02 | 上海电机学院 | SOP parallel network switch fault conversion control method and control system |
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