CN108684008A - Wireless sensor, wireless sensing system and wireless sensing method - Google Patents
Wireless sensor, wireless sensing system and wireless sensing method Download PDFInfo
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- CN108684008A CN108684008A CN201810460367.XA CN201810460367A CN108684008A CN 108684008 A CN108684008 A CN 108684008A CN 201810460367 A CN201810460367 A CN 201810460367A CN 108684008 A CN108684008 A CN 108684008A
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- 238000000034 method Methods 0.000 title claims description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 69
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 230000003321 amplification Effects 0.000 claims abstract description 17
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims description 41
- 238000001514 detection method Methods 0.000 claims description 26
- 238000005286 illumination Methods 0.000 claims description 24
- 230000000737 periodic effect Effects 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 11
- 230000008054 signal transmission Effects 0.000 claims description 8
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 230000005059 dormancy Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 description 79
- 238000010304 firing Methods 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 208000032369 Primary transmission Diseases 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
-
- 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
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
Abstract
The invention discloses a kind of wireless sensors, wherein detecting signal unit is changed into electric signal for detecting load signal, and by load signal；Signal amplification unit, the electric signal for exporting detecting signal unit are amplified；Signal conversion unit for amplified electric signal to be carried out analog-to-digital conversion, output digit signals, and is transmitted to micro-control unit；Micro-control unit, for being handled the digital signal after analog-to-digital conversion and forming data packet, the data packet is transmitted to wireless transmission unit, and control power supply unit is powered detecting signal unit, signal amplification unit, signal conversion unit, wireless transmission unit according to preset mode；Power supply unit is connected with the detecting signal unit, signal amplification unit, signal conversion unit, micro-control unit and wireless transmission unit, carries the electric energy needed for each unit work；Wireless transmission unit, for the data packet to be transmitted according to default wireless communication protocol.
Description
Technical field
The present invention relates to sensor field, more particularly to a kind of wireless sensor and sensor-based system.
Background technology
Pressure sensor is to experience pressure signal, and can be converted into pressure signal according to certain rule available defeated
The device or device of the electric signal gone out.Pressure sensor is a kind of sensor the most commonly used in industrial practice, extensive use
In various industrial automatic control environment, it is related to water conservancy and hydropower, railway traffic, intelligent building, production automatic control, aerospace, military project, stone
Numerous industries such as change, oil well, electric power, ship, lathe, pipeline.With the development of sensory field technology, to the reality of pressure sensor
When property requires also higher and higher.
Existing pressure sensor, in force structure placement force foil gauge in position appropriate, to realize " pressure → shape
The transformation of change → resistance variation ".Bridge circuit is constituted with fixed value resistance by pressure-strain piece or pressure-strain piece, using outer
Portion's power supply results from the voltage change of pressure correlation as excitation.Existing wireless pressure sensor has wireless transmission function
Signal processing module and electrical energy supply device.
But it is based on this, it was found by the inventors of the present invention that existing wireless sensor, is generally limited to volume, it is cell performance
The influence of energy, keeps its transmission rate relatively low.After improving transmission rate, power consumption sharply increases, cause battery service life, can
It is reduced by property.Also, rechargeable lithium battery is generally used, product operating temperature range is limited to lithium battery operating temperature range,
Battery performance is affected by temperature (low temperature) greatly, low temperature easily occurs and does not work phenomenon, cannot be satisfied the real-time of sensor and needs
It asks.
Being disclosed in the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or imply that the information is constituted in any form.
Invention content
The purpose of the present invention is to provide a kind of wireless sensor, wireless sensing methods, and corresponding wireless sensing system
System, to the disadvantage more than overcoming.
To achieve the above object, the present invention provides a kind of wireless sensors, including：Detecting signal unit, signal amplification
Unit, signal conversion unit, micro-control unit, power supply unit and wireless transmission unit, wherein detecting signal unit is used for
Load signal is detected, and load signal is changed into electric signal；Signal amplification unit, the electricity for exporting detecting signal unit
Signal is amplified；Signal conversion unit for amplified electric signal to be carried out analog-to-digital conversion, output digit signals, and passes
Transport to micro-control unit；Micro-control unit, for being handled the digital signal after analog-to-digital conversion and being formed data packet, by institute
It states data packet and is transmitted to wireless transmission unit, and control power supply unit turns detecting signal unit, signal amplification unit, signal
Change unit, wireless transmission unit is powered according to preset mode；Power supply unit amplifies with the detecting signal unit, signal
Unit, signal conversion unit, micro-control unit and wireless transmission unit are connected, and carry the electricity needed for each unit work
Energy；Wireless transmission unit, for the data packet to be transmitted according to default wireless communication protocol.
Preferably, in above-mentioned technical proposal, the detecting signal unit can also be detected intensity of illumination, Yi Jisuo
It includes solar panel and battery to state power supply unit, wherein when intensity of illumination is higher than preset value, uses solar cell
Plate is powered, and when intensity of illumination is less than preset value, is powered using battery.
Preferably, in above-mentioned technical proposal, the battery includes rechargeable battery, when intensity of illumination is higher than preset value and institute
When stating rechargeable battery and meeting charge condition, charge to the rechargeable battery；And the battery further includes that can not fill
Battery, the detecting signal unit can also be detected temperature, when temperature is less than preset value or the rechargeable battery
When less than default electricity, it is powered using the non-rechargeable battery.
Preferably, in above-mentioned technical proposal, the detecting signal unit, signal amplification unit, signal conversion unit and
Wireless transmission unit is controllable and can sleeping devices；The preset mode includes periodic sampling pattern, triggering pattern, Yi Jizhou
Phase samples+triggering pattern, and the micro-control unit controls the detecting signal unit according to above-mentioned three kinds of preset modes, signal is put
Big unit, signal conversion unit and wireless transmission unit are in work or dormant state.
Preferably, in above-mentioned technical proposal, the signal detection of the detecting signal unit and the wireless transmission unit
Signal transmission is arranged to fixed frequency, or is triggered under the control of micro-control unit, wherein signal detection frequency and letter
Number transmission frequency may be the same or different.
The present invention also provides a kind of wireless sensing methods, including：Load signal is detected, and load signal is changed into electricity
Signal；Electric signal after the transformation is amplified；The amplified electric signal is subjected to analog-to-digital conversion, exports number letter
Number；Data packet is handled the digital signal after the analog-to-digital conversion and is formed, by the data packet according to default channel radio
Letter agreement is transmitted；And keep each working cell in running order according to preset mode, and execute in the operating condition
Above-mentioned steps.
Preferably, further include that detection intensity of illumination is used when intensity of illumination is higher than preset value in above-mentioned technical proposal
Solar panel is powered, and when intensity of illumination is less than preset value, is powered using battery.
Preferably, in above-mentioned technical proposal, battery includes rechargeable battery and non-rechargeable battery, when intensity of illumination height
In preset value and when meeting charge condition, charge to the chargeable battery；Further include being detected to temperature, when temperature is low
When preset value or the rechargeable battery are less than default electricity, it is powered using the non-rechargeable battery.
Preferably, in above-mentioned technical proposal, the preset mode includes periodic sampling pattern, triggering pattern and period
Sampling+triggering pattern, and working cell is controlled according to above-mentioned three kinds of preset modes and is in work or dormant state；Signal detection and
Signal transmission is arranged to fixed frequency, or is controllably triggered, wherein signal detection frequency can with signal transmission frequencies
With identical, can also be different.
The present invention also provides a kind of wireless sensing system, including above-described wireless sensor and matched
Receiver, the receiver includes transmission unit, is communicated for the wireless transmission unit with wireless sensor, always
In reception state.
Compared with prior art, the present invention has the advantages that：First, the load used in technical scheme of the present invention
Lotus uploading rate is up to 50 times/second, and the upload number that technology uses now is most soon for 2 times/second, and therefore, the present invention can be more
Add and obtains transducing signal in real time；Secondly, the fusion of the invention using a variety of power supply plans so that temperature applicable range is more
Extensively, harsher use environment can be met, power supply plan is switched under different operating environment, be operable with -50 DEG C~
80℃；And in the present invention, since sample frequency and transmission frequency can be adjusted, and using with work and suspend mode two
The component of kind pattern so that so that product power consumption is extremely low, and match more battery integration technologies so that the present invention is extreme
It remains to keep normal work in the case of no light.
Description of the drawings
Fig. 1 is the structural schematic diagram of the wireless sensor of specific implementation mode according to the present invention.
Fig. 2 is the schematic flow chart of wireless sensing method according to the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Shield range is not restricted by specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " comprising " or its change
It changes such as "comprising" or " including " etc. and will be understood to comprise stated element or component, and do not exclude other members
Part or other component parts.
As shown in Figure 1, including signal detection amplifying circuit, conversion according to the wireless sensor of the specific embodiment of the invention
Circuit, micro-control unit MCU, power supply module and wireless transport module, below to the detailed construction of the wireless sensor with
And working method illustrates.
Detecting signal unit is changed into electric signal for detecting load signal, and by load signal.Wherein described load
Lotus, can be pressure or weight etc., and the variation by detecting the current or voltage value that it is generated due to stress and deformation generates
Electric signal.Load detection can it is more to be set as 50Hz, 30Hz, 15Hz, 8Hz, 4Hz, 2Hz, 1Hz, 0.5Hz etc. according to actual needs
Kind detection frequency, can also be according to the control of microprocessing unit come detection trigger.Detecting signal unit can also to temperature and
Intensity of illumination is detected.
Signal amplification unit, the electric signal for exporting detecting signal unit are amplified signal conversion unit
(ADC) it is appropriate for the rank of conversion, then by signal conversion unit, amplified electric signal is subjected to analog-to-digital conversion, it is defeated
Go out digital signal, and is transmitted to micro-control unit.
Micro-control unit handles the digital signal after analog-to-digital conversion and is formed data packet, and the data packet is transmitted
To wireless transmission unit, the data packet is sent according to default wireless communication protocol.The biography of the signal transmission unit
Defeated frequency can be set as 50Hz, 30Hz, 15Hz, 8Hz, 4Hz, 2Hz, 1Hz, 0.5Hz etc. as the case may be.Wherein, described
Wireless communication protocol can be 2.4G wireless communication protocols, can also be other wireless communication protocols.The micro-control unit can
To be microcontroller or other can realize the similar device of microcontroller function.
Power supply unit and the detecting signal unit, signal amplification unit, signal conversion unit, micro-control unit and
Wireless transmission unit is connected, and carries the electric energy needed for each unit work.
Power supply unit includes solar panel and battery, and the battery includes rechargeable battery and not chargeable electricity
Pond.As specific embodiment, rechargeable battery can be chargeable lithium electricity, and non-rechargeable battery can be lithium Asia battery.Work as light
According to intensity be higher than preset value when, be powered using solar panel, when intensity of illumination be less than preset value when, using battery into
Row power supply；When intensity of illumination meets charge condition higher than preset value and the rechargeable battery, to the rechargeable battery into
Row charging；When temperature is less than default electricity less than preset value or the rechargeable battery, using the non-rechargeable battery into
Row power supply.
The detecting signal unit, signal amplification unit, signal conversion unit and wireless transmission unit be it is controllable and
It can sleeping devices, that is to say, that said units can controllably be in operating mode or suspend mode.
Microprocessing unit can control said units according to preset mode, and the preset mode includes periodic sampling
Pattern, triggering pattern and periodic sampling+triggering pattern.
It describes in detail below to three kinds of preset modes, wherein the sample frequency i.e. detecting signal unit
Load signal detects frequency.
Periodic sampling pattern：The ratio of sample frequency and transmission frequency is 1, and at this time without firing line, i.e. firing line is invalid.Institute
It is user-defined alarming line to state firing line, when the measured value of the detecting signal unit for detecting load signal is more than firing line
Afterwards, the sensor transmits current measured value immediately, so that receiving terminal receives information.For being adopted according to user demand setting
Sample frequency, such as 50Hz, 30Hz, 15Hz, 8Hz, 4Hz, 2Hz, 1Hz, 0.5Hz, to reduce energy consumption, due to sampling and transmitting pin
Rate is consistent, i.e., sampling all needs transmission signal, firing line to be defined as sampling and just send signal, therefore firing line more than firing line every time
In vain.
Triggering pattern：The ratio of sample frequency and transmission frequency is just infinite, there is firing line.Such pattern is commonly used in
When detecting that load signal is more than preset value, start alarm, i.e., do not communicate usually, therefore can realize alarm work(with super low-power consumption
Energy.
Periodic sampling+triggering pattern：The ratio of sample frequency and transmission frequency is not 1 and just infinite, there is firing line.For
Low-frequency data transmission is provided, the optimum control of power consumption is realized in high-frequency sampling.For example, if detecting signal unit detects
Load transfinites and needs to alarm, and user needs to receive the alarm signal that wireless sensing device is sent in 30ms, then
User can select sample frequency for 50Hz, transmission frequency 2Hz, and the ratio of sample frequency and transmission frequency is 25, to real
Existing minimum energy consumption control.
Energy loss in wireless sensing device, including must energy consumption, triggering type intermittence energy consumption (including sampling energy consumption,
Transmit energy consumption).Must energy consumption be maintain equipment be in standby or dormant state energy consumption, hardware circuit energy consumption (voltage stabilizing chip etc.
Circuit), triggering sexual refractoriness energy consumption be energy consumption (including signal detection, signal processing, the wireless biography when realizing wireless sensor function
It is defeated etc., complete the required energy consumption of primary complete signal detection).
By being surveyed to the wireless sensor in technical solution of the present invention, it is necessary to when energy consumption includes each unit suspend mode
Energy consumption and the uncontrollable hardware energy consumption of other hardware, amount to 80uAs.
Sampling energy consumption includes that each unit realizes generated energy consumption when a signal detection, since each unit is completed once
It is shut off after detection, will not continue to generate energy consumption, by actual measurement, sampling energy consumption is 2.88uAs/ times.
Transmission energy consumption mainly includes the energy consumption of microprocessing unit and wireless transmission unit, and energy consumption is also after primary transmission
With regard to disappearing, pass through actual measurement, data transmission energy consumption：11.52uAs/ times.
Since the sample frequency F of wireless sensor in the present invention is adjustable, the ratio N of transmission frequency and sample frequency is adjustable,
To realize sampling energy consumption and transmit the control of energy consumption.Realize the optimization selection of performance and power consumption.
Such as：
Example 1：Feedback control is carried out to the real-time load signal that wireless sensor is transmitted, need to select high-speed sampling at this time
And high-speed transfer, therefore sample frequency F is set as 50Hz, transmission frequency is also set as 50Hz data and uploads (N 1, F/N=
50Hz), the situation in this example is the normal energy consumption of wireless sensing system highest.
Example 2：For overload alarm demand, in this case, the load signal transmitted is only used for artificially observing, and is not used in
Feedback control, you can select high frequency sampling, low-frequency transmission, it is 50Hz that F can be arranged at this time, and transmission frequency is set as 2Hz (N 25, F/
N=2Hz)
Example 3：User does not need too fast data monitoring, low-frequency sampling, low-frequency transmission can be selected, F can be arranged at this time is
1Hz, transmission frequency are 1Hz (N 1, F/N=1Hz)
Total energy consumption M can be by must energy consumption, sampling energy consumption and the progress of transmission energy consumption phase Calais when wireless sensor works
Calculate, according to necessary the energy consumption surveyed out above, sampling energy consumption and transmit the value of energy consumption and specific F in example 1- examples 3 with
N values, the total energy consumption M1-M3 that can be calculated separately out in 1- examples 3 are respectively：
M1=50Hz*2.88uAs/ times+50/1*11.52uAs/ times+80uAs=800uAs
M2=50Hz*2.88uAs/ times+50/25*11.52uAs/ times+80uAs=247.04uAs
M3=1Hz*2.88uAs/ times+1/1*11.52uAs/ times+80uAs=94.4uAs
It according to the above results, can be in the hope of：
M2=0.31M1, M3=0.12M1,
That is, in the case of in example 2, total energy consumption is only the 0.31 of the normal energy consumption of highest, in example 3 in the case of, always
Energy consumption is the 0.12 of the normal energy consumption of highest.It can be seen that according to specifically used demand, the value of F and N, Ke Yishi are reasonably set
Existing optimum control, reduces the energy consumption of wireless sensor.
Wireless sensor discussed above, as the transmitting terminal for detecting signal and being transmitted, for matched work
Make, further includes receiver in wireless sensing system.By the way that the transmission unit of receiver is located on reception state, and increase
The power consumption of receiver, so as to reduce the energy consumption of wireless sensor to a greater degree.
Specifically, if receiver is constantly in reception state, wireless sensor is sent at any time, and receiver all may be used
To receive；If receiver is in discontinuous reception (such as 0.5S receives 0.5S and closes), then wireless sensor must be sent out by lengthening
It penetrates the time and communication just can be achieved (more than 0.5S).
As shown in Fig. 2, the specific embodiment of the invention also discloses a kind of wireless sensing method, and first, detection load letter
Number, and load signal is changed into electric signal.Wherein described load, can be pressure or weight etc., by detect its due to
Stress and deformation and the variation of current or voltage value generated, generate electric signal.Load detection can be set as according to actual needs
A variety of detection frequencies such as 50Hz, 30Hz, 15Hz, 8Hz, 4Hz, 2Hz, 1Hz, 0.5Hz, can also be according to the control of microprocessing unit
Carry out detection trigger.At the same time it can also be detected to temperature and intensity of illumination.
Secondly, above electrical signal is amplified to the rank that signal conversion unit (ADC) is appropriate for conversion, then to amplification
Electric signal afterwards carries out analog-to-digital conversion, output digit signals.
Next, handled the digital signal after analog-to-digital conversion and formed data packet, and by the data packet according to
Default wireless communication protocol is transmitted, the transmission frequency can be set as the case may be 50Hz, 30Hz, 15Hz,
8Hz, 4Hz, 2Hz, 1Hz, 0.5Hz etc..Wherein, the wireless communication protocol can be 2.4G wireless communication protocols, can also be
Other wireless communication protocols.
Intensity of illumination is detected, when intensity of illumination is higher than preset value, is powered using solar panel, when
When intensity of illumination is less than preset value, it is powered using battery；When intensity of illumination is full higher than preset value and the rechargeable battery
When sufficient charge condition, charge to the rechargeable battery；Temperature is detected, when temperature less than preset value or it is described can
When rechargeable battery is less than default electricity, it is powered using the non-rechargeable battery.
The working cell of sensor is controlled according to preset mode, working cell is set as operating mode or suspend mode mould
Formula, the preset mode include periodic sampling pattern, triggering pattern and periodic sampling+triggering pattern.
It describes in detail below to three kinds of preset modes, wherein the sample frequency i.e. detecting signal unit
Load signal detects frequency.
Periodic sampling pattern：The ratio of sample frequency and transmission frequency is 1, no firing line (firing line is invalid).For root
Sample frequency, such as 50Hz, 30Hz, 15Hz, 8Hz, 4Hz, 2Hz, 1Hz, 0.5Hz are set according to user demand, to reduce energy consumption,
Consistent with transmission frequency due to sampling, i.e., sampling all needs transmission signal, firing line to be defined as sampling and just sent out more than firing line every time
The number of delivering letters, therefore firing line is invalid.
Triggering pattern：The ratio of sample frequency and transmission frequency is just infinite, there is firing line.Such pattern is commonly used in
When detecting that load signal is more than preset value, start alarm, i.e., do not communicate usually, therefore can realize alarm work(with super low-power consumption
Energy.
Periodic sampling+triggering pattern：The ratio of sample frequency and transmission frequency is not 1 and just infinite, there is firing line.For
Low-frequency data transmission is provided, the optimum control of power consumption is realized in high-frequency sampling.For example, if detecting signal unit detects
Load transfinites and needs to alarm, and user needs to receive the alarm signal that wireless sensing device is sent in 30ms, then
User can select sample frequency for 50Hz, transmission frequency 2Hz, and the ratio of sample frequency and transmission frequency is 25, to real
Existing minimum energy consumption control.
Energy loss in wireless sensing device, including must energy consumption, triggering type intermittence energy consumption (including sampling energy consumption,
Transmit energy consumption).Must energy consumption be maintain equipment be in standby or dormant state energy consumption, hardware circuit energy consumption (voltage stabilizing chip etc.
Circuit), triggering sexual refractoriness energy consumption be energy consumption (including signal detection, signal processing, the wireless biography when realizing wireless sensor function
It is defeated etc., complete the required energy consumption of primary complete signal detection).
By being surveyed to the wireless sensor in technical solution of the present invention, it is necessary to when energy consumption includes each unit suspend mode
Energy consumption and the uncontrollable hardware energy consumption of other hardware, amount to 80uA.
Sampling energy consumption includes that each unit realizes generated energy consumption when a signal detection, since each unit is completed once
It is shut off after detection, will not continue to generate energy consumption, by actual measurement, sampling energy consumption is 2.88uAs/ times.
Transmission energy consumption mainly includes the energy consumption of microprocessing unit and wireless transmission unit, and energy consumption is also after primary transmission
With regard to disappearing, pass through actual measurement, data transmission energy consumption：11.52uAs/ times.
Since the sample frequency F of wireless sensor in the present invention is adjustable, the ratio N of transmission frequency and sample frequency is adjustable,
To realize sampling energy consumption and transmit the control of energy consumption.Realize the optimization selection of performance and power consumption.
Such as：
Example 1：Feedback control is carried out to the real-time load signal that wireless sensor is transmitted, need to select high-speed sampling at this time
And high-speed transfer, therefore sample frequency F is set as 50Hz, transmission frequency is also set as 50Hz data and uploads (N 1, F/N=
50Hz), the situation in this example is the normal energy consumption of wireless sensing system highest.
Example 2：For overload alarm demand, in this case, the load signal transmitted is only used for artificially observing, and is not used in
Feedback control, you can select high frequency sampling, low-frequency transmission, it is 50Hz that F can be arranged at this time, and transmission frequency is set as 2Hz (N 25, F/
N=2Hz)
Example 3：User does not need too fast data monitoring, low-frequency sampling, low-frequency transmission can be selected, F can be arranged at this time is
1Hz, transmission frequency are 1Hz (N 1, F/N=1Hz)
Total energy consumption M can be by must energy consumption, sampling energy consumption and the progress of transmission energy consumption phase Calais when wireless sensor works
Calculate, according to necessary the energy consumption surveyed out above, sampling energy consumption and transmit the value of energy consumption and specific F in example 1- examples 3 with
N values, the total energy consumption M1-M3 that can be calculated separately out in 1- examples 3 are respectively：
M1=50Hz*2.88uAs/ times+50/1*11.52uAs/ times+80uA=800uA
M2=50Hz*2.88uAs/ times+50/25*11.52uAs/ times+80uA=247.04uA
M3=1Hz*2.88uAs/ times+1/1*11.52uAs/ times+80uA=94.4uA
It according to the above results, can be in the hope of：
M2=0.31M1, M3=0.12M1,
That is, in the case of in example 2, total energy consumption is only the 0.31 of the normal energy consumption of highest, in example 3 in the case of, always
Energy consumption is the 0.12 of the normal energy consumption of highest.It can be seen that according to specifically used demand, the value of F and N, Ke Yishi are reasonably set
Existing optimum control, reduces the energy consumption of wireless sensor.
The description of the aforementioned specific exemplary embodiment to the present invention is in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the present invention and its actually answering
With so that those skilled in the art can realize and utilize the present invention a variety of different exemplary implementation schemes and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (10)
1. a kind of wireless sensor, which is characterized in that including：Detecting signal unit, signal amplification unit, signal conversion unit,
Micro-control unit, power supply unit and wireless transmission unit, wherein
Detecting signal unit is changed into electric signal for detecting load signal, and by load signal；
Signal amplification unit, the electric signal for exporting detecting signal unit are amplified；
Signal conversion unit for amplified electric signal to be carried out analog-to-digital conversion, output digit signals, and is transmitted to microcontroller
Unit；
Micro-control unit passes the data packet for being handled the digital signal after analog-to-digital conversion and being formed data packet
Wireless transmission unit, and control power supply unit are transported to detecting signal unit, signal amplification unit, signal conversion unit, nothing
Line transmission unit is powered according to preset mode；
Power supply unit, with the detecting signal unit, signal amplification unit, signal conversion unit, micro-control unit and wireless
Transmission unit is connected, and carries the electric energy needed for each unit work；
Wireless transmission unit, for the data packet to be transmitted according to default wireless communication protocol.
2. wireless sensor according to claim 1, which is characterized in that the detecting signal unit can also be strong to illumination
Degree is detected and said supply unit includes solar panel and battery, wherein
It when intensity of illumination is higher than preset value, is powered using solar panel, when intensity of illumination is less than preset value, is made
It is powered with battery.
3. wireless sensor according to claim 2, which is characterized in that
The battery includes rechargeable battery, when intensity of illumination meets charge condition higher than preset value and the rechargeable battery
When, it charges to the rechargeable battery；And
The battery further includes non-rechargeable battery, and the detecting signal unit can also be detected temperature, when temperature is low
When preset value or the rechargeable battery are less than default electricity, it is powered using the non-rechargeable battery.
4. wireless sensor according to claim 1, which is characterized in that
The detecting signal unit, signal amplification unit, signal conversion unit and wireless transmission unit are controllable and can stop
Dormancy equipment；
The preset mode includes periodic sampling pattern, triggering pattern and periodic sampling+triggering pattern, the microcontroller list
Member controls the detecting signal unit, signal amplification unit, signal conversion unit and wireless according to above-mentioned three kinds of preset modes
Transmission unit is in work or dormant state.
5. wireless sensor according to claim 1, which is characterized in that the signal detection of the detecting signal unit and institute
The signal transmission for stating wireless transmission unit is arranged to fixed frequency, or is triggered under the control of micro-control unit, wherein
Signal detection frequency may be the same or different with signal transmission frequencies.
6. a kind of wireless sensing method, which is characterized in that including：
Load signal is detected, and load signal is changed into electric signal；
Electric signal after the transformation is amplified；
The amplified electric signal is subjected to analog-to-digital conversion, output digit signals；
Data packet is handled the digital signal after the analog-to-digital conversion and is formed, by the data packet according to default channel radio
Letter agreement is transmitted；And
Keep each working cell in running order according to preset mode, and executes above-mentioned steps in the operating condition.
7. wireless sensing method according to claim 6, which is characterized in that
Further include that detection intensity of illumination is powered using solar panel when intensity of illumination is higher than preset value, works as illumination
When intensity is less than preset value, it is powered using battery.
8. wireless sensing method according to claim 7, which is characterized in that
Battery includes rechargeable battery and non-rechargeable battery, when intensity of illumination is higher than preset value and meets charge condition,
It charges to the chargeable battery；
Further include being detected to temperature, when temperature is less than default electricity less than preset value or the rechargeable battery, uses
The non-rechargeable battery is powered.
9. wireless sensing method according to claim 6, which is characterized in that
The preset mode includes periodic sampling pattern, triggering pattern and periodic sampling+triggering pattern, and according to above-mentioned three
Kind preset mode control working cell is in work or dormant state；
Signal detection and signal transmission are arranged to fixed frequency, or are controllably triggered, wherein signal detection frequency with
Signal transmission frequencies may be the same or different.
10. a kind of wireless sensing system, including the wireless sensor described in claim 1-5 and matched reception
Machine, which is characterized in that
The receiver includes transmission unit, is communicated, is constantly in for the wireless transmission unit with wireless sensor
Reception state.
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