CN103217235A - 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, the monitoring to the hoister running status all is to realize by the detection to hoisting cable power.The detection method of hoisting cable tension force comprises direct Detection Method and indirect detection method.Direct Detection Method is that the steel wire rope tension detection device is installed on the hoisting conveyance top, and this device is made of sensor, signal acquisition module, wireless transmitter module and accumulator.The steel wire rope tension signal that detects sends by wireless transmitter module, accepts laggard line data processing by the receiver module of well head and obtains steel wire rope tension.Detection mainly contains following three kinds with the sensor of steel wire rope tension: pulling force sensor is connected between the hoisting cable hoisting conveyance; Bikini steel wire rope tension sensor; Oil pressure sensor is applicable to the multirope friction winder that hydraulic balance device is arranged between hoisting conveyance and the wire rope.Mainly there are four point defects in direct Detection Method: the transmission range of radio communication in pit shaft is short, when mine shaft depth surpasses 500 meters, can't 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 only is suitable for the occasion that hoisting conveyance and wire rope directly have hydraulic balance device.Indirect detection method is force cell to be installed detect steel wire rope tension on the bearing base of head sheave.This method requires force cell to have structure practicality, function practicality, long-time stability and high reliability.Sensor design difficulty, cost are very high, and are difficult to install.When damaging, sensor also is difficult in time find.
Can find that according to above analysis the detection by hoisting cable tension force at present reflects that mainly there is following defective in the method for hoister running status: sensor is installed inconvenience, and detection system is difficult in maintenance; Detection system is used has certain limitation, can not be applied to deep-well and detect; Battery-driven scheme need regularly replace battery, safeguards inconvenience; Existing sensor exist cost height, sensitivity low, wire rope had problems such as infringement.
Summary of the invention
The objective 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 is detected and node energy gathering-device and method.
The objective of the invention is to realize like this, 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 evenly are fixed on the elevator drum at intervals, and aggregation node is fixed on the hoister operator's console shell, and aggregation node links to each other with industrial computer by USB interface.
Described stress wireless senser working node and redundant node constitute 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, the FLASH extended memory connects, the clock chip output terminal links to each other with the MCU microcontroller chip, UWB radio transmitting and receiving chip output terminal is connected with the PCB antenna, micro wind turbine generator is connected with synchronous charge-extraction circuit, the charge-extraction circuit is connected with power module synchronously, power module is connected with the Buck-Boost pressure regulator, Buck-Boost pressure regulator and signal conditioning circuit, the MCU microcontroller chip, the 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, piezoelectricity composite beam and mass; The piezoelectricity composite beam adopts cantilever beam structure, adopt micro-processing technology that one end is fixed on the silicon substrate, contain multilayer PZT piezoelectric patches in the piezoelectricity composite beam, the upper and lower surface of each layer PZT piezoelectric patches all has metal electrode to be used to collect electric charge, and the metal electrode between wherein every two-layer PZT piezoelectric patches is shared; Mass is positioned at piezoelectricity composite beam free end.
Described aggregation node is made 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 and UWB radio transmitting and receiving chip, FLASH extended memory and usb circuit join, clock chip links to each other with the MCU microcontroller chip, the UWB radio transmitting and receiving chip is connected with the PCB antenna, the AC-DC switch power module output terminal that is connected with alternating current is connected with low pressure difference linear voltage regulator, and low pressure difference linear voltage regulator is connected with clock chip with MCU microcontroller chip, UWB radio transmitting and receiving chip.
Elevator drum stress field detection method comprises: the detection method of the energy supply method of stress wireless sensor node and elevator drum stress field; The energy supply method of described stress wireless sensor node is: adopt the power supply of micro wind turbine generator and lithium battery mixed structure counter stress wireless sensor node, make each assembly have complementary advantages; The detection method of described elevator drum stress field is: set sample frequency, set clock synchronization, trigger stress wireless senser working node and aggregation node respectively according to the sample frequency of setting, stress wireless senser working node sends to aggregation node with the information of collecting, the information pre-service of aggregation node to receiving, send the data to industrial computer by USB interface then, industrial computer obtains cylinder stress field state with the information divisional processing that receives; When stress wireless senser working node broke down, aggregation node can start redundant node and replace stress wireless senser working node, realizes the collection to the elevator drum stress information.
Beneficial effect, owing to adopted such scheme, adopt the power supply of miniature piezoelectric aerogenerator and lithium battery mixed structure counter stress wireless sensor node, make each assembly have complementary advantages: with the energy source of energy harvester-miniature piezoelectric aerogenerator as system, it can export unlimited energy, but underpower is directly to power to wireless senser, and the output power of battery is higher, but the finite energy of storage, therefore it is used as the power buffer memory, output power then when needing is constantly accepted electric charge from gatherer At All Other Times; Described micro wind turbine generator is captured the wind energy of cylinder rotation drive and is converted into electric energy, because air toughness, the existence of viscosity makes near the gas the cylinder surface rotate with cylinder, the speed of cylinder is generally several metre per second (m/s)s to tens metre per second (m/s)s, much smaller than the velocity of sound, so can regard near the gas that rotates with cylinder the cylinder as rational incompressible fluid.Cylinder pivots in viscous incompressible fluid, and the circular stream line motion of the gas that viscosity causes is equivalent to the mobile flow field of ideal fluid irrotationality that point unit vortex is induced.The speed of supposing cylinder is
v 0, the gas of cylinder surface attached to cylinder surface with speed
v 0Rotate around cylinder axis, relative with cylinder static, the gas flow rate on it reduces with the increase inverse proportion of radius of turn.
Mass is positioned at the piezoelectric cantilever free end, regulate the frequency of piezoelectricity composite 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 variation of piezoelectricity internal stress and strain, because piezoelectric effect, the electric potential difference that will change between the upper/lower electrode of piezoelectric layer realizes the power supply to lithium ion battery.
(1),, realized elevator drum stress is detected by design stress wireless senser working node, stress wireless senser redundant node and aggregation node based on wireless sensor network technology;
(2) based on the little energy technology of MEMS, by the mixed structure that the miniature piezoelectric aerogenerator combines with lithium battery wireless strain gauge node is powered, realized the wireless sensor node Maintenance free, the advantage that the life-span is unlimited, and reduced node size;
(3) this elevator drum stress field detection method can not brought any potential safety hazard to elevator system with device, and is safe and reliable;
(4) adopt the UWB The Technology of Ultra, have very high traffic rate and communication reliability, system responses is quick, and is low in energy consumption;
(5) method and simple in structure, stability is strong, the reliability height, install simple, Maintenance free, cost low, highly sensitive, can be used in deep-well and detect.
Maintenance free, can be applied to that deep-well detects, sensor life-time is unlimited, cost is low, highly sensitive, harmless to wire rope, reach purpose of the present invention.
Advantage: the pick-up unit of this elevator drum stress field can not bring any potential safety hazard to hoister, and is safe and reliable; Sensor network adopts redundant framework, even certain node breaks down and also can not influence system and normally move; Adopt the power supply of mixed structure counter stress wireless senser working node and redundant node, make each assembly have complementary advantages, realized that sensor forever powers.And do not need rotating mechanism based on the miniature piezoelectric aerogenerator of wind-induced vibration mechanism, and simple in structure, be convenient to adopt little silicon processing technique to produce in batches, cost is low, is combined into mixed structure with lithium ion battery, has saved the space greatly.
Description of drawings
Fig. 1 is a 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.
[0024]Among the figure: 1, stress wireless senser working node; 2, stress wireless senser redundant node; 1 (2)-1, stress wireless senser and charge-extraction circuit synchronously; 1 (2)-2, piezoelectricity composite 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 evenly are fixed on the elevator drum at intervals, and aggregation node is fixed on the hoister operator's console shell, and aggregation node links to each other with industrial computer by USB interface.
Described stress wireless senser working node and redundant node constitute 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, the FLASH extended memory connects, the clock chip output terminal links to each other with the MCU microcontroller chip, UWB radio transmitting and receiving chip output terminal is connected with the PCB antenna, micro wind turbine generator is connected with synchronous charge-extraction circuit, the charge-extraction circuit is connected with power module synchronously, power module is connected with the Buck-Boost pressure regulator, Buck-Boost pressure regulator and signal conditioning circuit, the MCU microcontroller chip, the 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, piezoelectricity composite beam and mass; The piezoelectricity composite beam adopts cantilever beam structure, adopt micro-processing technology that one end is fixed on the silicon substrate, contain multilayer PZT piezoelectric patches in the piezoelectricity composite beam, the upper and lower surface of each layer PZT piezoelectric patches all has metal electrode to be used to collect electric charge, and the metal electrode between wherein every two-layer PZT piezoelectric patches is shared; Mass is positioned at piezoelectricity composite beam free end.
Described aggregation node is made 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 and UWB radio transmitting and receiving chip, FLASH extended memory and usb circuit join, clock chip links to each other with the MCU microcontroller chip, the UWB radio transmitting and receiving chip is connected with the PCB antenna, the AC-DC switch power module output terminal that is connected with alternating current is connected with low pressure difference linear voltage regulator, and low pressure difference linear voltage regulator is connected with clock chip with MCU microcontroller chip, UWB radio transmitting and receiving chip.
Elevator drum stress field detection method comprises: the detection method of the energy supply method of stress wireless sensor node and elevator drum stress field; The energy supply method of described stress wireless sensor node is: adopt the power supply of micro wind turbine generator and lithium battery mixed structure counter stress wireless sensor node, make each assembly have complementary advantages; The detection method of described elevator drum stress field is: set sample frequency, set clock synchronization, trigger stress wireless senser working node and aggregation node respectively according to the sample frequency of setting, stress wireless senser working node sends to aggregation node with the information of collecting, the information pre-service of aggregation node to receiving, send the data to industrial computer by USB interface then, industrial computer obtains cylinder stress field state with the information divisional processing that receives; When stress wireless senser working node broke down, aggregation node can start redundant node and replace stress wireless senser working node, realizes the collection to the elevator drum stress information.
Among Fig. 1, the 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 constitute.12 stress wireless senser working nodes and redundant node evenly are fixed on the edge of elevator drum at intervals, are used to detect the stress of cylinder, and according to on-the-spot actual needs, the stress wireless sensor node can increase or reduce; On hoister operator's console shell, fix an aggregation node, be used to receive the stress data of stress wireless senser working node transmission and judge, data are normally then carried out pre-service, send the data to industrial computer by USB interface afterwards, when data exception or working node do not send data, aggregation node then requires to make normal response in the malfunctioning node 5s, otherwise just abandon and open redundant node and replace malfunctioning node to finish detection the elevator drum stress field; Industrial computer is handled the machine cylinder information of force field that gets a promotion with the information analysis that receives.
Among Fig. 2, be integrated in one based on the miniature piezoelectric aerogenerator and the stress wireless senser of wind-induced vibration.The miniature piezoelectric aerogenerator is made of piezoelectricity composite beam, mass and silicon substrate.The piezoelectricity composite beam adopts cantilever beam structure, adopts micro-processing technology that one end is fixed on the silicon substrate.Contain multilayer PZT piezoelectric patches in the piezoelectricity composite beam, be used for the output characteristics of regulator generator internal impedance or raising generator, the upper and lower surface of each layer piezoelectric layer all has metal electrode to be used to collect electric charge, and the metal electrode between wherein every two-layer piezoelectric layer is shared.Mass is positioned at the piezoelectric cantilever free end, regulate the frequency of piezoelectricity composite 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 variation of piezoelectricity internal stress and strain, because piezoelectric effect, the electric potential difference that will change between the upper/lower electrode of piezoelectric layer realizes the power supply to lithium ion battery.
In Fig. 3, wireless strain gauge working node and redundant node constitute 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 constitutes by 4, and wherein two are used for detecting circumferentially and radial strain, and two are used for temperature compensation in addition, and four foil gauges constitute full-bridge circuit.Signal conditioning circuit is made of filter amplification circuit, and the voltage signal that full-bridge circuit is exported converts 0-5V standard signal input MCU microcontroller chip to.The MCU microcontroller chip is selected MSP430F1611 low-power consumption chip for use, and 12 A/D converters of integrated 8 passages of this chip internal carry out analog to digital conversion with voltage signal and are stored in the internal RAM.Clock chip is selected X1226 for use, is used for timing wake-up MCU microcontroller chip and gathers stress data.The UWB radio transmitting and receiving chip is selected XS110 for use, and the wireless signal transmission frequency of this chip is 3.1GHz, and traffic rate is 110M/S, and the stress data that is used for the MCU microcontroller chip is gathered is given aggregation node by the PCB antenna transmission.Adopt the power supply of mixed structure counter stress wireless senser, make each assembly have complementary advantages: with the energy source of energy micro wind turbine generator as system, it can export unlimited energy, but underpower is directly to power to wireless senser, and the output power of battery is higher, but therefore the finite energy of storage uses it as the power buffer memory, output power then when needing is constantly accepted electric charge from gatherer At All Other Times.Piezoelectricity aerogenerator, lithium ion battery and stress wireless sensor node have different voltage and current characteristics.Here by batch (-type) trickle synchronous charge-extraction circuit period property ground the electric charge that accumulates on the piezoelectricity aerogenerator is transferred in the lithium ion battery, be embodied as the continuous charging of lithium ion battery.Adopt holding circuit to the carrying out of lithium ion battery put, overcharge and short-circuit protection.Adopt the Buck-Boost pressure regulator to provide stable 3.3V voltage for signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip.
In Fig. 4, piezoelectricity aerogenerator based on wind-induced vibration is converted to electric energy with wind energy, by batch (-type) trickle synchronous charge-extraction circuit period property ground the electric charge that accumulates on the piezoelectricity aerogenerator is transferred in the lithium ion battery, be embodied as the continuous charging of lithium ion battery.Adopt holding circuit to the carrying out of lithium ion battery put, overcharge with short-circuit protection and adopt the Buck-Boost pressure regulator to provide stable 3.3V voltage for sensor load.
Fig. 5 is synchronous charge-extraction circuit, and lithium ion battery has different voltage and current characteristics with the stress wireless sensor node.Here by batch (-type) trickle synchronous charge-extraction circuit period property ground the electric charge that accumulates on the piezoelectricity aerogenerator is transferred in the lithium ion battery, be embodied as the continuous charging of lithium ion battery.
Fig. 6 is a Buck-Boost regulator circuit schematic diagram, adopt the Buck-Boost pressure regulator to provide stable 3.3V voltage for signal conditioning circuit, MCU microcontroller chip, UWB radio transmitting and receiving chip and clock chip, 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 a 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; surpassed the mistake that stops sparking voltage or termination charging voltage and put or overcharge, caused the remarkable decline of battery performance the damage battery.Here adopt holding circuit to the carrying out of lithium ion battery put, overcharge and short-circuit protection.Wherein integrated protective circuit ICR5421 is used for detecting parameters such as the current voltage of holding circuit, electric current, time and controls the on off state of field effect transistor V1 and V2 with this; Whether field effect transistor V1 and V2 then come to have in the control loop and need open or close according to protection IC; Chip-R is as current limliting; Patch capacitor act as filtering, control lag time; Thermistor is used for detecting the environment temperature in the battery block; It is excessive that fuse prevents to flow through the electric current of battery, 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 the real-time working state, energy consumption is bigger, and its position is convenient to power supply, is its power supply so adopt alternating current.The 220V AC power converts the 5V DC voltage to through AC-DC switch power module AOC_5S, provides stable 3.3V voltage by low pressure difference linear voltage regulator MAX16999 for peripheral circuit and chip then.Remainder is identical with the stress wireless sensor node.
Cylinder stress field detection method is described in further detail:
(1), evenly fix 12 wireless strain gauge working nodes and redundant node on elevator drum marginating compartment ground, fixing aggregation node on the operator's console shell, and link to each other with industrial computer by usb bus;
(2), open stress wireless senser working node and aggregation node, the node power-up initializing, the setting sample frequency is 10Hz, and sets clock synchronization between the node;
(3), wake the MCU microcontroller chip of stress wireless senser working node and aggregation node up, node is started working every the 0.1s clock chip.Stress information is gathered and sent to stress wireless senser working node, and aggregation node carries out pre-service after accepting these information and judging normally, sends to industrial computer by usb bus then, and industrial computer is handled data and obtained the cylinder information of force field.
(4), when certain node breaks down, aggregation node requires it to resend data, when malfunctioning node was not made normal reaction within 5s, aggregation node then started redundant node and replaces malfunctioning node to finish detection to the elevator drum stress field.
(5), when one promote loop ends after, automatically node is carried out clock synchronization, prevent the accumulation of each nodal clock error, guarantee synchronous working between each node.
Claims (5)
1. an elevator drum stress field detects and the node energy collection method, it is characterized in that, the energy supply method of stress wireless sensor node is: adopt the power supply of micro wind turbine generator and lithium battery mixed structure counter stress wireless sensor node, make each assembly have complementary advantages; The detection method of elevator drum stress field is: set sample frequency, set clock synchronization, trigger stress wireless senser working node and aggregation node respectively according to the sample frequency of setting, stress wireless senser working node sends to aggregation node with the information of collecting, aggregation node is judged the information that receives, data are normally then carried out pre-service, send the data to industrial computer by USB interface afterwards, when data exception or working node do not send data, aggregation node then requires to make normal response in the malfunctioning node 5s, otherwise just abandon and open redundant node and replace malfunctioning node to finish detection the elevator drum stress field; Industrial computer obtains cylinder stress field state with the information processing that receives.
2. realize that the described elevator drum stress field of claim 1 detects and the device of node energy collection method for one kind, 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 evenly are fixed on the elevator drum at intervals, and aggregation node is fixed on the hoister operator's console shell, and aggregation node connects with industry control by USB interface and links to each other.
3. elevator drum stress field according to claim 2 detects and the node energy gathering-device, it is characterized in that described stress wireless senser working node and redundant node are made 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, the output terminal of signal conditioning circuit is connected with the MCU microcontroller chip, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, the FLASH extended memory connects, the clock chip output terminal links to each other with the MCU microcontroller chip, UWB radio transmitting and receiving chip output terminal is connected with the PCB antenna, micro wind turbine generator is connected with synchronous charge-extraction circuit, the charge-extraction circuit is connected with power module synchronously, power module is connected with the Buck-Boost pressure regulator, Buck-Boost pressure regulator and signal conditioning circuit, the MCU microcontroller chip, the UWB radio transmitting and receiving chip is connected with clock chip.
4. elevator drum stress field according to claim 2 detects and the node energy gathering-device, it is characterized in that, described aggregation node is by the MCU microcontroller chip, the UWB radio transmitting and receiving chip, the FLASH extended memory, usb circuit, the PCB antenna, clock chip, AC-DC switch power module and low pressure difference linear voltage regulator constitute, the output terminal of MCU microcontroller chip and UWB radio transmitting and receiving chip, FLASH extended memory and usb circuit join, clock chip links to each other with the MCU microcontroller chip, the UWB radio transmitting and receiving chip is connected with the PCB antenna, the AC-DC switch power module output terminal that is connected with alternating current is connected with low pressure difference linear voltage regulator, low pressure difference linear voltage regulator and MCU microcontroller chip, the UWB radio transmitting and receiving chip is connected with clock chip.
5. elevator drum stress field according to claim 3 detects and the node energy gathering-device, it is characterized in that, 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, piezoelectricity composite beam and mass; The piezoelectricity composite beam adopts cantilever beam structure, adopt micro-processing technology that one end is fixed on the silicon substrate, contain multilayer PZT piezoelectric patches in the piezoelectricity composite beam, the upper and lower surface of each layer PZT piezoelectric patches all has metal electrode to be used to collect electric charge, and the metal electrode between wherein every two-layer PZT piezoelectric patches is shared; Mass is positioned at piezoelectricity composite beam free end.
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| CN107832511A (en) * | 2017-10-31 | 2018-03-23 | 中国矿业大学 | The Reliability-based Robust Design method of ultradeep well hoisting container multi-invalidation mode |
| CN113418640A (en) * | 2021-05-07 | 2021-09-21 | 武汉理工大学 | Polar region ship anchor windlass roller stress detection device and stress detection method |
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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 |