CN106448121A - Wireless sensor - Google Patents
Wireless sensor Download PDFInfo
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- CN106448121A CN106448121A CN201611141340.1A CN201611141340A CN106448121A CN 106448121 A CN106448121 A CN 106448121A CN 201611141340 A CN201611141340 A CN 201611141340A CN 106448121 A CN106448121 A CN 106448121A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
Abstract
The invention relates to the technical field of sensors, particularly a wireless sensor. The wireless sensor comprises a data acquisition module, a data processing module, a radio-frequency module and a power supply module which are sequentially superposed from bottom to top, wherein the data processing module is respectively connected with the data acquisition module and radio-frequency module, and used for receiving data acquired by the data acquisition module and storing the data, and meanwhile, transmitting the data to a wireless base station through the radio-frequency module; and the power supply module is respectively connected with the data acquisition module, data processing module and radio-frequency module and used for supplying power. The data acquisition module, data processing module, radio-frequency module and power supply module are installed on the bottom plate of the sensor from bottom to top, and such installation mode can greatly reduce the volume of the sensor. The wireless sensor does not need any cable, has the characteristics of small size, light weight, low power consumption, high storage capacity, long working time and the like, and has wide application prospects and favorable economic benefits.
Description
Technical field
The present invention relates to sensor technical field, more particularly, to a kind of wireless senser.
Background technology
Compared with traditional sensor, wireless senser does not need cable, have flexibly, low-power consumption, low cost, MANET
The features such as, apply more and more extensive in practice.In the modal test of some structural members and the test of some rotational structures, anxious
Wireless senser need to be used, test efficiency can be greatly enhanced.Existing wireless senser volume and weight is all larger, at certain
On a little testpieces, these wireless sensers are installed, the mechanical characteristic of testpieces itself may be affected.In addition, traditional sensors body
Long-pending larger, larger capacity batteries can be installed in inside, after reducing sensor bulk, necessarily affects internal cell volume, thus
Have influence on the power consumption of battery.
Content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is to solve existing wireless senser to there is volume greatly, impact testpieces itself
The problem of mechanical characteristic.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of wireless senser, including stacking successively from bottom to top
The data acquisition module of setting, data processing module, radio-frequency module and power module, described data processing module respectively with described
Data acquisition module and described radio-frequency module connect, to receive the data that described data acquisition module obtains and by data storage,
Sent to wireless base station by described radio-frequency module simultaneously, described power module respectively with described data acquisition module, described number
Connect and power according to processing module and described radio-frequency module.
Wherein, described data acquisition module includes a 3 axis MEMS acceleration transducer and three collection paths, every
Described collection path all includes signal conditioning circuit, filter circuit and the AD acquisition chip being sequentially connected, and each described signal is adjusted
Reason circuit is all connected with described 3 axis MEMS acceleration transducer, after each described AD acquisition chip is sequentially connected in a daisy chain fashion
It is connected with described data processing module again.
Wherein, each described AD acquisition chip is equipped with SPI interface, described AD acquisition chip passes through described SPI interface
Carry out daisy chaining connection.
Wherein, described AD acquisition chip is 16 low-power consumption A/D chip.
Wherein, described filter circuit is second order active low pass filter.
Wherein, described power module includes lithium battery, charging circuit, power supply modulate circuit and control circuit composition, described
Lithium battery is charged by external interface, and power supply is nursed one's health into digital power and mould by described power supply modulate circuit by described lithium battery
Intend power supply.
Wherein, described data processing module includes CPU and FLASH, described CPU respectively with described data acquisition module, institute
State radio-frequency module and described FLASH connects.
Wherein, described radio-frequency module is operated in the ISM band of 2.4GHz.
(3) beneficial effect
The technique scheme of the present invention has the advantage that：Wireless senser of the present invention is by data acquisition module, data
Processing module, radio-frequency module and power module are arranged on sensor base plate by the way of from bottom to top, by this installation
Mode can greatly reduce the volume of sensor.The data of data collecting module collected is passed through radio frequency mould by data processing module
Block sends to wireless base station, simultaneously by data storage, to prevent the number that wireless data packet loss leads under severe electromagnetic environment
According to loss, realize data dual fail-safe.The modularized design of the present invention can be realized not by changing different data acquisition modules
Same parameter measurement function, changes the wireless data transceiving that radio-frequency module realizes other frequency ranges, has very big motility.?
It is integrated with the functional modules such as data storage, wireless receiving and dispatching, charging in very little volume, reached general purpose transducer requirement
While, also make sensor bulk compact, lightweight, the application scenario sensitive to volume weight such as suitable modal test.With now
There is acceleration transducer to compare, the present invention does not need cable, there is small volume, lightweight, low in energy consumption, memory capacity is big, work
The features such as time is long, can be applicable to the fields such as modal test, acceleration analysis, Bridge Condition Monitoring, wind electricity blade monitoring, has
Wide application prospect and good economic benefit.
Except described above present invention solves the technical problem that, the technical characteristic of technical scheme that constitutes and have this
Outside the advantage that the technical characteristic of a little technical schemes is brought, the other technical characteristics of the present invention and these technical characteristics bring
Advantage, will combine accompanying drawing and further illustrate.
Brief description
Fig. 1 is the structural representation of embodiment of the present invention wireless senser；
Fig. 2 is the fundamental diagram of the data processing module of embodiment of the present invention wireless senser；
Fig. 3 is the composition schematic diagram of the data acquisition module of embodiment of the present invention wireless senser；
Fig. 4 is the composition schematic diagram of the power module of embodiment of the present invention wireless senser.
In figure：1：Data acquisition module；2：Data processing module；3：Radio-frequency module；4：Power module；11：3 axis MEMS
Acceleration transducer；12：Signal conditioning circuit；13：Filter circuit；14：AD acquisition chip；21：CPU；22：FLASH；41：Lithium
Battery；42：Charging circuit；43：Power supply modulate circuit；44：Control circuit；45：External interface.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Additionally, in describing the invention, unless otherwise stated, " multiple ", " many ", " multigroup " be meant that two or
Two or more, " several ", " some ", " some groups " are meant that one or more.
As depicted in figs. 1 and 2, wireless senser provided in an embodiment of the present invention, including stacking setting from bottom to top successively
Data acquisition module 1, data processing module 2, radio-frequency module 3 and power module 4, data processing module 2 adopted with data respectively
Collection module 1 and radio-frequency module 3 connect, and with the data of receiving data acquisition module 1 acquisition and by data storage, pass through radio frequency simultaneously
Module 3 sends to wireless base station, and power module 4 is connected with data acquisition module 1, data processing module 2 and radio-frequency module 3 respectively
And power.
Wireless senser of the present invention is by data acquisition module, data processing module, radio-frequency module and power module using certainly
Lower and on mode be arranged on sensor base plate, can greatly reduce the volume of sensor by this mounting means.Number
According to processing module, the data of data collecting module collected is sent to wireless base station by radio-frequency module, simultaneously by data storage,
To prevent the loss of data that wireless data packet loss leads under severe electromagnetic environment, realize data dual fail-safe.The mould of the present invention
Massing design can realize different parameter measurement functions by changing different data acquisition modules, change radio-frequency module and realize
The wireless data transceiving of other frequency ranges, has very big motility.It is integrated with data storage, wireless in very little volume
The functional modules such as transmitting-receiving, charging, while having reached general purpose transducer requirement, also make sensor bulk compact, lightweight,
The application scenario sensitive to volume weight such as suitable modal test.Compared with existing acceleration transducer, the present invention does not need electricity
Cable, have that small volume, lightweight, low in energy consumption, memory capacity is big, longevity of service the features such as, can be applicable to modal test, acceleration
The fields such as degree measurement, Bridge Condition Monitoring, wind electricity blade monitoring, have broad application prospects and good economic benefit.
Wherein, as shown in figure 3, data acquisition module 1 includes 3 axis MEMS (MEMS) acceleration transducer
11 and three collection paths, signal conditioning circuit 12, filter circuit 13 and AD that every collection path all includes being sequentially connected adopt
Collection chip 14, each signal conditioning circuit 12 is all connected with 3 axis MEMS acceleration transducer 11, and each AD acquisition chip 14 is with chrysanthemum
Pattern chain mode is connected with data processing module 2 after being sequentially connected again.Wherein, each AD acquisition chip 14 is equipped with SPI (serial
Peripheral Interface) interface, AD acquisition chip 14 carries out daisy chaining connection by SPI interface.3 axis MEMS acceleration transducer X
The Three-channel data of axle, Y-axis and Z axis carries out independent signal conditioning and AD collection respectively, using analog signal output 3 axis MEMS
Acceleration transducer, 3-axis acceleration signal is synchronously filtered gathering with AD, and each road signal carries out signal condition first, will
The signal condition of 3 axis MEMS acceleration transducer output becomes 0V-2.5V voltage signal so as to meet the input of AD acquisition chip
Scope.Using the AD acquisition chip of SPI interface, three AD acquisition chips are connected by daisy chaining, to reduce I/O pin,
It is connected with data processing module by the SPI interface output of one of AD acquisition chip eventually, data acquisition module also can adopt
Three single shaft MEMS acceleration transducers connect three collection paths respectively.
Wherein, AD acquisition chip 14 is 16 low-power consumption A/D chip.Wherein, filter circuit 13 is second order active low-pass filtering
Device.AD acquisition chip adopts 16 low-power consumption A/D chip of SPI interface, and AD collection digit is 16, with digital MEMS sensing
Device is compared it is ensured that the accuracy sampled and data syn-chronization, and precision is higher, reliability is higher.Filter circuit is had using second order
Source low pass filter, frequency filtering is arranged according to actual needs.
Wherein, as shown in figure 4, power module 4 includes lithium battery 41, charging circuit 42, power supply modulate circuit 43 and controls
Circuit 44 forms, and lithium battery 41 is charged by external interface 45, and power supply is nursed one's health into by lithium battery 41 by power supply modulate circuit 43
Digital power and analog power.Power module is by lithium battery, charging circuit, power supply modulate circuit and low power consumpting controling circuit group
Become, can be lithium cell charging by external interface, lithium battery power supply is nursed one's health into by digital power and mould by power supply modulate circuit
Intend power supply, respectively data acquisition module, data processing module and radio-frequency module is powered.The present embodiment adopts 3.7V lithium battery to supply
Electricity, is charged by external charging interface using special charging chip, and is become 3.7V voltage stabilizing using battery management chip
3.0V power supply is system power supply.In the hibernation mode, the CPU of power module only data processing module powers, miscellaneous equipment
It is in closed mode, can greatly reduce the power consumption of system.
Wherein, as shown in Fig. 2 data processing module 2 includes CPU21 and FLASH22, CPU21 respectively with data acquisition module
Block 1, radio-frequency module 3 and FLASH22 connect.The core devices of data processing module are super low-power consumption CPU, and CPU reads SPI interface
Triple channel AD gathered data, and it is sent to long distance wireless base station by radio-frequency module according to specified data frame format,
Simultaneously by data storage to high-capacity FLASH, to prevent the data that wireless data packet loss leads under severe electromagnetic environment
Lose, realize data " dual fail-safe ", the mode of this double copies ensure that the reliability of data, using high-capacity FLASH storage
Chip, while being wirelessly transferred, sensor node can be with real-time storage data it is ensured that the reliability of data.Thus coordinate
Data acquisition module achieves conditioning, collection, storage and the wireless transmit of 3-axis acceleration signal.Using super low-power consumption CPU,
Power consumption is very low, and can enter resting state with the power consumption of microampere order, extends working time and the stand-by time of sensor.
Wherein, radio-frequency module 3 is operated in the ISM band of 2.4GHz.Preferably, radio-frequency module is operated in the ISM of 2.4GHz
Frequency range, this frequency range is the free wireless communication frequency band in the whole world, can reduce design and use cost.
During use, the present invention is because realize the modularity of wireless senser, by providing for simple replacement of data acquisition module
Type, it is possible to achieve the measurement of other physical parameters, such as temperature, pressure, strain etc., need not significantly change design it is also possible to
By changing radio-frequency module, realize the wireless data transceiving function of other frequency ranges.This modularized design right is not limited only to wirelessly
Acceleration transducer, also comprises the field of other wireless measurement such as strain, voltage, electric current, temperature, electric charge, pressure, angular speed.
By from the electronic devices and components of low-power consumption and low power consumption control strategy, the operating current of system is very low, and quiescent current reaches
Arrive microampere order, the cruising time of wireless senser can have been extended, using Time synchronization algorithm, sample-synchronous precision has reached microsecond
Level.
In sum, wireless senser of the present invention is by data acquisition module, data processing module, radio-frequency module and power supply mould
Block is arranged on sensor base plate by the way of from bottom to top, can greatly reduce sensor by this mounting means
Volume.The data of data collecting module collected is sent to wireless base station by data processing module by radio-frequency module, simultaneously by number
According to storage, to prevent the loss of data that wireless data packet loss leads under severe electromagnetic environment, realize data dual fail-safe.This
Bright modularized design can realize different parameter measurement functions by changing different data acquisition modules, changes radio frequency mould
Block realizes the wireless data transceiving of other frequency ranges, has very big motility.It is integrated with data in very little volume to deposit
The functional modules such as storage, wireless receiving and dispatching, charging, while having reached general purpose transducer requirement, also make sensor bulk compact,
Lightweight, the application scenario sensitive to volume weight such as suitable modal test.Compared with existing acceleration transducer, the present invention is not
Need cable, have that small volume, lightweight, low in energy consumption, memory capacity is big, longevity of service the features such as, can be applicable to mode examination
Test, acceleration analysis, Bridge Condition Monitoring, the field such as wind electricity blade monitoring, have broad application prospects and good economy
Benefit.
Finally it should be noted that：Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a kind of wireless senser it is characterised in that：Including stacking the data acquisition module of setting from bottom to top successively, at data
Reason module, radio-frequency module and power module, described data processing module respectively with described data acquisition module and described radio frequency mould
Block connects, to receive the data of described data acquisition module acquisition and by data storage, to be sent by described radio-frequency module simultaneously
To wireless base station, described power module respectively with described data acquisition module, described data processing module and described radio-frequency module
Connect and power.
2. wireless senser according to claim 1 it is characterised in that：Described data acquisition module includes three axles
MEMS acceleration transducer and three collection paths, signal conditioning circuit that every described collection path all includes being sequentially connected,
Filter circuit and AD acquisition chip, each described signal conditioning circuit is all connected with described 3 axis MEMS acceleration transducer, respectively
Described AD acquisition chip is connected with described data processing module after being sequentially connected in a daisy chain fashion again.
3. wireless senser according to claim 2 it is characterised in that：It is equipped with SPI on each described AD acquisition chip
Interface, described AD acquisition chip carries out daisy chaining connection by described SPI interface.
4. wireless senser according to claim 2 it is characterised in that：Described AD acquisition chip is 16 low-power consumption AD cores
Piece.
5. wireless senser according to claim 2 it is characterised in that：Described filter circuit is second order active low-pass filtering
Device.
6. the wireless senser according to claim 1-5 any one it is characterised in that：Described power module includes lithium electricity
Pond, charging circuit, power supply modulate circuit and control circuit composition, described lithium battery is charged by external interface, described lithium battery
Power supply is nursed one's health into by digital power and analog power by described power supply modulate circuit.
7. wireless senser according to claim 6 it is characterised in that：Described data processing module include CPU and
FLASH, described CPU are connected with described data acquisition module, described radio-frequency module and described FLASH respectively.
8. wireless senser according to claim 6 it is characterised in that：Described radio-frequency module is operated in the ISM of 2.4GHz
Frequency range.
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| CN201611141340.1A CN106448121A (en) | 2016-12-12 | 2016-12-12 | Wireless sensor |
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| CN201611141340.1A CN106448121A (en) | 2016-12-12 | 2016-12-12 | Wireless sensor |
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Cited By (1)
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Application publication date: 20170222 |