CN103217235B - Device and method for promoting stress field detection and node energy collection of expansion cylinder of elevator - Google Patents
Device and method for promoting stress field detection and node energy collection of expansion cylinder of elevator Download PDFInfo
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Abstract
The invention relates to a device and method for promoting stress field detection and node energy collection of an expansion cylinder of an elevator and belongs to a device and method for the stress field detection of the expansion cylinder. A miniature wind-driven generator is integrally designed with a stress wireless sensor, working nodes and redundant nodes of the stress wireless sensor are fixed on the expansion cylinder of the elevator, a mixed structure of a lithium ion battery and the miniature piezoelectric wind-driven generator based on a wind-induced vibration mechanism is used for supplying power, aggregation nodes are fixed on a casing of an operation platform of the elevator, and the aggregation nodes are connected with an industrial personal computer through universal serial bus (USB) ports. The detection device has the advantages of being safe and reliable; avoiding influences on normal operation of a system even if a certain node breaks down due to the fact that a redundant structure is adopted by a sensor network; and adopting the mixed structure to provide power for the stress wireless sensor to enable each component to have complementary advantages to achieve permanent power supply of the sensor. A miniature piezoelectric wind-driven generator based on the wind-induced vibration mechanism does not need the rotating mechanism, is simple in structure and low in cost, and is combined with the lithium ion battery to form the mixed structure to save spaces.
Description
Technical field
The present invention relates to a kind of cylinder stress field pick-up unit and method, particularly a kind of elevator drum stress field detects and node energy gathering-device and method.
Background technology
At present, be all by realizing the detection of hoisting cable power to the monitoring of hoister running status.The detection method of hoisting cable tension force comprises direct Detection Method and indirect detection method.Direct Detection Method installs steel cable tension tester on hoisting conveyance top, and this device is made up of sensor, signal acquisition module, wireless transmitter module and accumulator.The steel wire rope tension signal detected is sent by wireless transmitter module, accepts laggard row data processing obtain steel wire rope tension by the receiver module of well head.Detect and mainly contain following three kinds with the sensor of steel wire rope tension: pulling force sensor, is connected between hoisting cable hoisting conveyance; Bikini armored rope tension sensor; Oil pressure sensor, is applicable to the multirope friction winder having hydraulic balance device between hoisting conveyance and wire rope.Mainly there are four point defects in direct Detection Method: radio communication transmission range is in the wellbore short, when mine shaft depth is more than 500 meters, cannot realize reliable communication; Accumulator needs periodic replacement, safeguards inconvenience; Sensor installation and maintenance inconvenience; Pulling force sensor sensitivity is low, and tension pick-up can aggravate the fatigue wear of wire rope, and oil pressure sensor is only suitable for the occasion directly having hydraulic balance device for hoisting conveyance and wire rope.Indirect detection method on the bearing base of head sheave, installs force cell to detect steel wire rope tension.The method requires that force cell has structure practicality, practical function, long-time stability and high reliability.Sensor design difficulty, cost are very high, and are difficult to install.Also Timeliness coverage is difficult to when sensor damages.
Can find according to above analysis, reflect that the method for hoister running status mainly exists following defect by the detection of hoisting cable tension force at present: inconvenience installed by sensor, and detection system is difficult in maintenance; Detection system application has certain limitation, can not be applied to deep-well and detect; Battery-driven scheme needs to regularly replace battery, safeguards inconvenience; Existing sensor exists that cost is high, sensitivity is low, have the problems such as infringement to wire rope.
Summary of the invention
The object of the invention is to provide a kind of Maintenance free, can be applied to that deep-well detects, sensor life-time is unlimited, cost is low, highly sensitive, the harmless elevator drum stress field of wire rope detected and node energy gathering-device and method.
The object of the invention is to be realize like this, the inventive system comprises elevator drum, stress wireless senser working node, stress wireless senser redundant node, aggregation node, USB interface and industrial computer, stress wireless senser working node and redundant node are evenly fixed on the edge of elevator drum at intervals, for detecting the stress of cylinder, aggregation node is fixed on hoister operator's console shell, for receiving the stress data of stress wireless senser working node transmission and judging, data normally then carry out pre-service, aggregation node is connected with industrial computer by USB interface, industrial computer is sent the data to by USB interface, when data exception or working node do not send data, aggregation node then requires to make normal response in malfunctioning node 5s, otherwise it is that just abandon and open redundant node and replace malfunctioning node to complete detection to elevator drum stress field, the information analysis process of reception gets a promotion machine cylinder information of force field by industrial computer.
Described stress wireless senser working node and redundant node are made up of micro wind turbine generator, synchronous charge-extraction circuit, Buck-Boost pressure regulator, foil gauge, signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, PCB antenna, clock chip and power module, foil gauge is connected with signal conditioning circuit, and described foil gauge is formed by 4, and wherein two panels is for detecting circumference and radial strain, another two for temperature compensation, four foil gauges form full-bridge circuits, signal conditioning circuit is made up of filter amplification circuit, the voltage signal that full-bridge circuit exports is converted to 0-5V standard signal input MCU microcontroller chip, the output terminal of signal conditioning circuit is connected with MCU microcontroller chip, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, FLASH extended memory connects, clock chip output terminal is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip output terminal is connected with PCB antenna, micro wind turbine generator connects with synchronous charge-extraction circuit, synchronous charge-extraction circuit is connected with power module, power module is connected with Buck-Boost pressure regulator, Buck-Boost pressure regulator and signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with clock chip,
Described MCU microcontroller chip selects MSP430F1611 low-power chip, and voltage signal is carried out analog to digital conversion and is stored in internal RAM by the integrated 8 Channel 12-Bit A/D converters of this chip internal; Clock chip selects X1226, gathers stress data for timing wake-up MCU microcontroller chip; Described UWB radio transmitting and receiving chip selects XS110, and the wireless signal transmission frequency of this chip is 3.1GHz, and traffic rate is 110M/S, for the stress data of MCU microcontroller chip collection is sent to aggregation node by PCB antenna; Mixed structure counter stress wireless senser is adopted to power, each assembly is had complementary advantages: with the energy source of energy micro wind turbine generator as system, it can export unlimited energy, and the output power of battery is higher, power buffer memory is it can be used as to use, then output power when needing, constantly At All Other Times accepts electric charge from gatherer; Piezoelectric wind driven generator, lithium ion battery and stress wireless sensor node have different voltage and current characteristics; By the synchronous charge-extraction circuit period property of batch (-type) trickle by Charger transfer that piezoelectric wind driven generator accumulates in lithium ion battery, be embodied as the continuous charging of lithium ion battery; Adopted protection circuit to the carrying out of lithium ion battery to put, overcharge and short-circuit protection; Employing Buck-Boost pressure regulator is signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip provide stable 3.3V voltage.
Described micro wind turbine generator is the miniature piezoelectric aerogenerator based on wind-induced vibration mechanism, is integrated in one based on the miniature piezoelectric aerogenerator of wind-induced vibration and stress wireless senser; Described miniature piezoelectric aerogenerator is made up of silicon substrate, Piezoelectric anisotropy beam and mass; Piezoelectric anisotropy beam adopts cantilever beam structure, micro-processing technology is adopted to be fixed on silicon substrate by one end, containing multilayer PZT piezoelectric patches in Piezoelectric anisotropy beam, for regulator generator internal impedance or the output characteristics improving generator, the upper and lower surface of every one deck PZT piezoelectric patches all has metal electrode for collecting electric charge, and the metal electrode wherein between every two-layer PZT piezoelectric patches shares; Mass is positioned at Piezoelectric anisotropy beam free end, regulate the frequency of Piezoelectric anisotropy beam, and in wind, form vortex as bluff body, vortex shedding causes the vibration of mass, cause the distortion of piezoelectric cantilever, and then cause the change of piezoelectricity internal stress and strain, due to piezoelectric effect, the electric potential difference will changed between the upper/lower electrode of piezoelectric layer, realizes the power supply to lithium ion battery.
Described aggregation node is by MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, usb circuit, PCB antenna, clock chip, AC-DC switch power module and low pressure difference linear voltage regulator are formed, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, FLASH extended memory and usb circuit connect, clock chip is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with PCB antenna, the AC-DC switch power module output terminal be connected with alternating current is connected with low pressure difference linear voltage regulator, low pressure difference linear voltage regulator and MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with clock chip, aggregation node does not need to detect stress information, does not have foil gauge and signal conditioning circuit, aggregation node is in instantaneous operating conditions, and energy consumption is comparatively large, adopts AC-powered, 220V AC power converts 5V DC voltage to through AC-DC switch power module AOC_5S, then by low pressure difference linear voltage regulator MAX16999 for peripheral circuit and chip provide stable 3.3V voltage, remainder is identical with stress wireless sensor node.
Elevator drum stress field detection method comprises: the energy supply method of stress wireless sensor node and the detection method of elevator drum stress field; The energy supply method of described stress wireless sensor node is: adopt micro wind turbine generator and lithium battery mixed structure counter stress wireless sensor node to power, each assembly is had complementary advantages; The detection method of described elevator drum stress field is: setting sample frequency, setting clock synchronous, stress wireless senser working node and aggregation node is triggered respectively according to the sample frequency of setting, the information of collection is sent to aggregation node by stress wireless senser working node, aggregation node is to the information pre-processing received, then send the data to industrial computer by USB interface, the information divisional processing of reception is obtained cylinder stress field state by industrial computer; When stress wireless senser working node breaks down, aggregation node can start redundant node and replace stress wireless senser working node, realizes the collection to elevator drum stress information.
Beneficial effect, owing to have employed such scheme, miniature piezoelectric aerogenerator and lithium battery mixed structure counter stress wireless sensor node is adopted to power, each assembly is had complementary advantages: with the energy source of energy harvester-miniature piezoelectric aerogenerator as system, it can export unlimited energy, but underpower is to power directly to wireless senser, and the output power of battery is higher, but the finite energy stored, therefore power buffer memory is it can be used as to use, then output power when needing, constantly At All Other Times accepts electric charge from gatherer; Described micro wind turbine generator is captured the wind energy of drum rotating drive and is converted into electric energy, due to air toughness, the existence of viscosity makes the gas near cylinder surface rotate with cylinder, the speed of cylinder is generally a few metre per second (m/s) to tens metre per second (m/s)s, much smaller than the velocity of sound, so can the gas rotated with cylinder near cylinder be regarded as rationality incompressible fluid.Cylinder pivots in viscous incompressible fluid, and the circular stream line motion of the gas that viscosity causes is equivalent to the flow field of the ideal fluid irrotational flow of point unit vortex induction.Assuming that the speed of cylinder is
v 0, the gas of cylinder surface is attached to cylinder surface with speed
v 0rotate around cylinder axis, with cylinder geo-stationary, the gas flow rate on it reduces with the increase inverse proportion of radius of turn.
Mass is positioned at piezoelectric cantilever free end, regulate the frequency of Piezoelectric anisotropy beam, and in wind, form vortex as bluff body, vortex shedding causes the vibration of mass, cause the distortion of piezoelectric cantilever, and then cause the change of piezoelectricity internal stress and strain, due to piezoelectric effect, the electric potential difference will changed between the upper/lower electrode of piezoelectric layer, realizes the power supply to lithium ion battery.
(1) based on wireless sensor network technology, by design stress wireless senser working node, stress wireless senser redundant node and aggregation node, achieve elevator drum stress mornitoring;
(2) based on the micro-energy technology of MEMS, the mixed structure be combined with lithium battery by miniature piezoelectric aerogenerator is powered to wireless strain gauge node, achieves wireless sensor node Maintenance free, the advantage that the life-span is unlimited, and reduces node size;
(3) this elevator drum stress field detection method and device can not bring any potential safety hazard to elevator system, safe and reliable;
(4) adopt UWB the Technology of Ultra, have very high traffic rate and communication reliability, system responses is quick, low in energy consumption;
(5) simply, stability is strong, and reliability is high for method and structure, installs simply, Maintenance free, cost are low, highly sensitive, can be used in deep-well detection.
Maintenance free, can be applied to deep-well detect, sensor life-time is unlimited, cost is low, highly sensitive, harmless to wire rope, reach object of the present invention.
Advantage: the pick-up unit of this elevator drum stress field can not bring any potential safety hazard to hoister, safe and reliable; Sensor network adopts redundancy framework, even if certain nodes break down also can not normally run by influential system; Adopt mixed structure counter stress wireless senser working node and redundant node to power, each assembly is had complementary advantages, achieves sensor and forever power.And not needing rotating mechanism based on the miniature piezoelectric aerogenerator of wind-induced vibration mechanism, structure is simple, and be convenient to adopt micro-silicon processing technique to produce in batches, cost is low, becomes mixed structure with assembling lithium ion battery, saves space greatly.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present invention.
Fig. 2 is the structural drawing of stress wireless senser working node of the present invention and redundant node.
Fig. 3 is the structural drawing of stress wireless senser working node of the present invention and redundant node.
Fig. 4 is the structural drawing of piezoelectricity wind-power electricity generation micro-system of the present invention.
Fig. 5 is the circuit diagram of synchronous charge-extraction circuit of the present invention.
Fig. 6 is the circuit diagram of Buck-Boost pressure regulator of the present invention.
Fig. 7 is the circuit diagram of lithium battery protection circuit of the present invention.
Fig. 8 is the structural drawing of aggregation node of the present invention.
In figure: 1, stress wireless senser working node; 2, stress wireless senser redundant node; 1 (2)-1, stress wireless senser and synchronous charge-extraction circuit; 1 (2)-2, Piezoelectric anisotropy beam; 1 (2)-3, mass; 1 (2)-4, silicon substrate; 3, elevator drum; 4, aggregation node; 5, usb bus; 6, industrial computer; 7, operator's console.
Embodiment
Embodiment 1: the present invention includes apparatus and method, this device comprises: elevator drum, stress wireless senser working node, stress wireless senser redundant node, aggregation node, USB interface and industrial computer; Stress wireless senser working node and redundant node are evenly fixed on elevator drum at intervals, and aggregation node is fixed on hoister operator's console shell, and aggregation node is connected with industrial computer by USB interface.
Described stress wireless senser working node and redundant node are formed by micro wind turbine generator, synchronous charge-extraction circuit, Buck-Boost pressure regulator, foil gauge, signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, PCB antenna, clock chip and power module, foil gauge is connected with signal conditioning circuit, the output terminal of signal conditioning circuit is connected with the input end of MCU microcontroller chip, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, FLASH extended memory connects, clock chip output terminal is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip output terminal is connected with PCB antenna, micro wind turbine generator connects with synchronous charge-extraction circuit, synchronous charge-extraction circuit is connected with power module, power module is connected with Buck-Boost pressure regulator, Buck-Boost pressure regulator and signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with clock chip.
Described micro wind turbine generator is the miniature piezoelectric aerogenerator based on wind-induced vibration mechanism, and described miniature piezoelectric aerogenerator is made up of silicon substrate, Piezoelectric anisotropy beam and mass; Piezoelectric anisotropy beam adopts cantilever beam structure, micro-processing technology is adopted to be fixed on a silicon substrate one end, containing multilayer PZT piezoelectric patches in Piezoelectric anisotropy beam, the upper and lower surface of every one deck PZT piezoelectric patches all has metal electrode for collecting electric charge, and the metal electrode wherein between every two-layer PZT piezoelectric patches shares; Mass is positioned at Piezoelectric anisotropy beam free end.
Described aggregation node is made up of MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, usb circuit, PCB antenna, clock chip, AC-DC switch power module and low pressure difference linear voltage regulator; The output terminal of MCU microcontroller chip connects with UWB radio transmitting and receiving chip, FLASH extended memory and usb circuit, clock chip is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with PCB antenna, the AC-DC switch power module output terminal be connected with alternating current is connected with low pressure difference linear voltage regulator, and low pressure difference linear voltage regulator is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip.
Elevator drum stress field detection method comprises: the energy supply method of stress wireless sensor node and the detection method of elevator drum stress field; The energy supply method of described stress wireless sensor node is: adopt micro wind turbine generator and lithium battery mixed structure counter stress wireless sensor node to power, each assembly is had complementary advantages; The detection method of described elevator drum stress field is: setting sample frequency, setting clock synchronous, stress wireless senser working node and aggregation node is triggered respectively according to the sample frequency of setting, the information of collection is sent to aggregation node by stress wireless senser working node, aggregation node is to the information pre-processing received, then send the data to industrial computer by USB interface, the information divisional processing of reception is obtained cylinder stress field state by industrial computer; When stress wireless senser working node breaks down, aggregation node can start redundant node and replace stress wireless senser working node, realizes the collection to elevator drum stress information.
In Fig. 1, elevator drum stress detection device mainly contains 6 stress wireless senser working nodes, 6 stress wireless senser redundant nodes, elevator drum, aggregation node, USB interface and industrial computers are formed.12 stress wireless senser working nodes and redundant node are evenly fixed on the edge of elevator drum at intervals, and for detecting the stress of cylinder, according to on-the-spot actual needs, stress wireless sensor node can increase or reduce; Hoister operator's console shell is fixed an aggregation node, for receiving the stress data of stress wireless senser working node transmission and judging, data normally then carry out pre-service, industrial computer is sent the data to afterwards by USB interface, when data exception or working node do not send data, aggregation node then requires to make normal response in malfunctioning node 5s, otherwise just abandon and open redundant node and replace malfunctioning node to complete detection to elevator drum stress field; The information analysis process of reception gets a promotion machine cylinder information of force field by industrial computer.
In Fig. 2, be integrated in one based on the miniature piezoelectric aerogenerator of wind-induced vibration and stress wireless senser.Miniature piezoelectric aerogenerator is made up of Piezoelectric anisotropy beam, mass and silicon substrate.Piezoelectric anisotropy beam adopts cantilever beam structure, adopts micro-processing technology to be fixed on a silicon substrate one end.Containing multilayer PZT piezoelectric patches in Piezoelectric anisotropy beam, for regulator generator internal impedance or the output characteristics improving generator, the upper and lower surface of each lamination electric layer all has metal electrode for collecting electric charge, and the metal electrode wherein between every two-layer piezoelectric layer shares.Mass is positioned at piezoelectric cantilever free end, regulate the frequency of Piezoelectric anisotropy beam, and in wind, form vortex as bluff body, vortex shedding causes the vibration of mass, cause the distortion of piezoelectric cantilever, and then cause the change of piezoelectricity internal stress and strain, due to piezoelectric effect, the electric potential difference will changed between the upper/lower electrode of piezoelectric layer, realizes the power supply to lithium ion battery.
In figure 3, wireless strain gauge working node and redundant node are formed by micro wind turbine generator, synchronous charge-extraction circuit, Buck-Boost pressure regulator, foil gauge, signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, PCB antenna, clock chip and power module.Foil gauge is formed by 4, and wherein two panels is for detecting circumference and radial strain, another two for temperature compensation, four foil gauges form full-bridge circuits.Signal conditioning circuit is made up of filter amplification circuit, the voltage signal that full-bridge circuit exports is converted to 0-5V standard signal input MCU microcontroller chip.MCU microcontroller chip selects MSP430F1611 low-power chip, and voltage signal is carried out analog to digital conversion and is stored in internal RAM by the integrated 8 Channel 12-Bit A/D converters of this chip internal.Clock chip selects X1226, gathers stress data for timing wake-up MCU microcontroller chip.UWB radio transmitting and receiving chip selects XS110, and the wireless signal transmission frequency of this chip is 3.1GHz, and traffic rate is 110M/S, for the stress data of MCU microcontroller chip collection is sent to aggregation node by PCB antenna.Mixed structure counter stress wireless senser is adopted to power, each assembly is had complementary advantages: with the energy source of energy micro wind turbine generator as system, it can export unlimited energy, but underpower is to power directly to wireless senser, and the output power of battery is higher, but the finite energy stored, therefore it can be used as power buffer memory to use, then output power when needing, constantly At All Other Times accepts electric charge from gatherer.Piezoelectric wind driven generator, lithium ion battery and stress wireless sensor node have different voltage and current characteristics.Here by the synchronous charge-extraction circuit period property of batch (-type) trickle by Charger transfer that piezoelectric wind driven generator accumulates in lithium ion battery, be embodied as the continuous charging of lithium ion battery.Adopted protection circuit to the carrying out of lithium ion battery to put, overcharge and short-circuit protection.Employing Buck-Boost pressure regulator is signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip provide stable 3.3V voltage.
In the diagram, be electric energy based on the piezoelectric wind driven generator of wind-induced vibration by Wind resource change, by the synchronous charge-extraction circuit period property of batch (-type) trickle by Charger transfer that piezoelectric wind driven generator accumulates in lithium ion battery, be embodied as the continuous charging of lithium ion battery.Adopted protection circuit to the carrying out of lithium ion battery to put, overcharged and short-circuit protection adopt Buck-Boost pressure regulator to provide stable 3.3V voltage for sensor load.
Fig. 5 is synchronous charge-extraction circuit, and lithium ion battery and stress wireless sensor node have different voltage and current characteristics.Here by the synchronous charge-extraction circuit period property of batch (-type) trickle by Charger transfer that piezoelectric wind driven generator accumulates in lithium ion battery, be embodied as the continuous charging of lithium ion battery.
Fig. 6 is Buck-Boost regulator circuit schematic diagram, employing Buck-Boost pressure regulator is signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip provide stable 3.3V voltage, and it is by gate-controlled switch Q, energy storage inductor L, diode D, filter capacitor C, pull-up resistor R
lwith compositions such as control circuits.
Fig. 7 is lithium ionic battery protection circuit; the rated voltage of lithium ion battery is generally 3.7V, stops sparking voltage and is about 2.7V, stops charging voltage and is about 4.2V; exceed the mistake stopping sparking voltage or termination charging voltage to put or overcharge and will damage battery, cause the remarkable decline of battery performance.Here adopted protection circuit to the carrying out of lithium ion battery to put, overcharge and short-circuit protection.Wherein integrated protective circuit ICR5421 is used for detecting the current parameter such as voltage, electric current, time of protection circuit with this to control the on off state of field effect transistor V1 and V2; Whether field effect transistor V1 and V2 then comes to have in control loop and need open or close according to protection IC; Chip-R is used as current limliting; Patch capacitor act as filtering, control lag time; Thermistor is used for detecting the environment temperature in battery block; Fuse prevents the electric current flowing through battery excessive, cuts off current return.
In fig. 8, aggregation node is not owing to needing to detect stress information, so do not have foil gauge and signal conditioning circuit in its structural design.Because aggregation node is in instantaneous operating conditions, energy consumption is comparatively large, and power supply is convenient in its position, so adopt alternating current for its power supply.220V AC power converts 5V DC voltage to through AC-DC switch power module AOC_5S, then by low pressure difference linear voltage regulator MAX16999 for peripheral circuit and chip provide stable 3.3V voltage.Remainder is identical with stress wireless sensor node.
Cylinder stress field detection method is described in further detail:
(1), on elevator drum marginating compartment ground evenly fix 12 wireless strain gauge working nodes and redundant node, operator's console shell fixes aggregation node, and is connected with industrial computer by usb bus;
(2), open stress wireless senser working node and aggregation node, node power-up initializing, setting sample frequency is 10Hz, and sets clock synchronous between node;
(3), wake the MCU microcontroller chip of stress wireless senser working node and aggregation node up every 0.1s clock chip, node is started working.The working node collection of stress wireless senser also sends stress information, and aggregation node accepts these information and judges to carry out pre-service normally, and then send to industrial computer by usb bus, industrial computer obtains cylinder information of force field to data processing.
(4), when certain nodes break down, aggregation node requires that it resends data, and when malfunctioning node does not make normal reaction within 5s, aggregation node then starts redundant node and replaces malfunctioning node to complete detection to elevator drum stress field.
(5), after a lifting circulation terminates, automatically clock synchronous is carried out to node, prevent the accumulation of each nodal clock error, ensure synchronous working between each node.
Claims (5)
1. a micro wind turbine generator is used for elevator drum stress field detection method, it is characterized in that: the energy supply method of stress wireless sensor node is: adopt micro wind turbine generator and lithium battery mixed structure counter stress wireless sensor node to power, each assembly is had complementary advantages, the detection method of elevator drum stress field is: setting sample frequency, setting clock synchronous, stress wireless senser working node and aggregation node is triggered respectively according to the sample frequency of setting, the information of collection is sent to aggregation node by stress wireless senser working node, aggregation node judges the information received, data normally then carry out pre-service, industrial computer is sent the data to afterwards by USB interface, when data exception or working node do not send data, aggregation node then requires to make normal response in malfunctioning node 5s, otherwise it is that just abandon and open redundant node and replace malfunctioning node to complete detection to elevator drum stress field, the information processing of reception is obtained cylinder stress field state by industrial computer.
2. realize the device of micro wind turbine generator for elevator drum stress field detection method, it is characterized in that: the inventive system comprises elevator drum, stress wireless senser working node, stress wireless senser redundant node, aggregation node, USB interface and industrial computer, stress wireless senser working node and redundant node are evenly fixed on the edge of elevator drum at intervals, for detecting the stress of cylinder, aggregation node is fixed on hoister operator's console shell, for receiving the stress data of stress wireless senser working node transmission and judging, data normally then carry out pre-service, aggregation node is connected with industrial computer by USB interface, industrial computer is sent the data to by USB interface, when data exception or working node do not send data, aggregation node then requires to make normal response in malfunctioning node 5s, otherwise it is that just abandon and open redundant node and replace malfunctioning node to complete detection to elevator drum stress field, the information analysis process of reception gets a promotion machine cylinder information of force field by industrial computer.
3. micro wind turbine generator according to claim 2 is used for elevator drum stress field pick-up unit, it is characterized in that: described stress wireless senser working node and redundant node are made up of micro wind turbine generator, synchronous charge-extraction circuit, Buck-Boost pressure regulator, foil gauge, signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, PCB antenna, clock chip and power module, foil gauge is connected with signal conditioning circuit, and described foil gauge is formed by 4, and wherein two panels is for detecting circumference and radial strain, another two for temperature compensation, four foil gauges form full-bridge circuits, signal conditioning circuit is made up of filter amplification circuit, the voltage signal that full-bridge circuit exports is converted to 0-5V standard signal input MCU microcontroller chip, the output terminal of signal conditioning circuit is connected with MCU microcontroller chip, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, FLASH extended memory connects, clock chip output terminal is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip output terminal is connected with PCB antenna, micro wind turbine generator connects with synchronous charge-extraction circuit, synchronous charge-extraction circuit is connected with power module, power module is connected with Buck-Boost pressure regulator, Buck-Boost pressure regulator and signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with clock chip,
Described MCU microcontroller chip selects MSP430F1611 low-power chip, and voltage signal is carried out analog to digital conversion and is stored in internal RAM by the integrated 8 Channel 12-Bit A/D converters of this chip internal; Clock chip selects X1226, gathers stress data for timing wake-up MCU microcontroller chip; Described UWB radio transmitting and receiving chip selects XS110, and the wireless signal transmission frequency of this chip is 3.1GHz, and traffic rate is 110M/S, for the stress data of MCU microcontroller chip collection is sent to aggregation node by PCB antenna; Mixed structure counter stress wireless senser is adopted to power, each assembly is had complementary advantages: with the energy source of energy micro wind turbine generator as system, it can export unlimited energy, and the output power of battery is higher, power buffer memory is it can be used as to use, then output power when needing, constantly At All Other Times accepts electric charge from gatherer; Piezoelectric wind driven generator, lithium ion battery and stress wireless sensor node have different voltage and current characteristics; By the synchronous charge-extraction circuit period property of batch (-type) trickle by Charger transfer that piezoelectric wind driven generator accumulates in lithium ion battery, be embodied as the continuous charging of lithium ion battery; Adopted protection circuit to the carrying out of lithium ion battery to put, overcharge and short-circuit protection; Employing Buck-Boost pressure regulator is signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip provide stable 3.3V voltage.
4. micro wind turbine generator according to claim 2 is used for elevator drum stress field pick-up unit, it is characterized in that: described aggregation node is by MCU microcontroller chip, UWB radio transmitting and receiving chip, FLASH extended memory, usb circuit, PCB antenna, clock chip, AC-DC switch power module and low pressure difference linear voltage regulator are formed, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, FLASH extended memory and usb circuit connect, clock chip is connected with MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with PCB antenna, the AC-DC switch power module output terminal be connected with alternating current is connected with low pressure difference linear voltage regulator, low pressure difference linear voltage regulator and MCU microcontroller chip, UWB radio transmitting and receiving chip is connected with clock chip, aggregation node does not need to detect stress information, does not have foil gauge and signal conditioning circuit, aggregation node is in instantaneous operating conditions, and energy consumption is comparatively large, adopts AC-powered, 220V AC power converts 5V DC voltage to through AC-DC switch power module AOC_5S, then by low pressure difference linear voltage regulator MAX16999 for peripheral circuit and chip provide stable 3.3V voltage, remainder is identical with stress wireless sensor node.
5. micro wind turbine generator according to claim 3 is used for elevator drum stress field pick-up unit, it is characterized in that, described micro wind turbine generator is the miniature piezoelectric aerogenerator based on wind-induced vibration mechanism, is integrated in one based on the miniature piezoelectric aerogenerator of wind-induced vibration and stress wireless senser; Described miniature piezoelectric aerogenerator is made up of silicon substrate, Piezoelectric anisotropy beam and mass; Piezoelectric anisotropy beam adopts cantilever beam structure, micro-processing technology is adopted to be fixed on silicon substrate by one end, containing multilayer PZT piezoelectric patches in Piezoelectric anisotropy beam, for regulator generator internal impedance or the output characteristics improving generator, the upper and lower surface of every one deck PZT piezoelectric patches all has metal electrode for collecting electric charge, and the metal electrode wherein between every two-layer PZT piezoelectric patches shares; Mass is positioned at Piezoelectric anisotropy beam free end, regulate the frequency of Piezoelectric anisotropy beam, and in wind, form vortex as bluff body, vortex shedding causes the vibration of mass, cause the distortion of piezoelectric cantilever, and then cause the change of piezoelectricity internal stress and strain, due to piezoelectric effect, the electric potential difference will changed between the upper/lower electrode of piezoelectric layer, realizes the power supply to lithium ion battery.
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| CN101710008A (en) * | 2009-12-01 | 2010-05-19 | 中国矿业大学 | Method and device for detecting stress of hoisting machine head sheave |
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Effective date of registration: 20210427 Address after: No.61 Tangyan Road, high tech Zone, Xi'an, Shaanxi 710075 Patentee after: SHAANXI YANCHANG PETROLEUM MINING INDUSTRY Co.,Ltd. Patentee after: China University of Mining and Technology Address before: 221116 Department of science and technology, China University of Mining and Technology, 1 University Road, Xuzhou, Jiangsu Patentee before: China University of Mining and Technology |
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