CN208029098U - Wireless sensor, wireless sensing system - Google Patents
Wireless sensor, wireless sensing system Download PDFInfo
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- CN208029098U CN208029098U CN201820722611.0U CN201820722611U CN208029098U CN 208029098 U CN208029098 U CN 208029098U CN 201820722611 U CN201820722611 U CN 201820722611U CN 208029098 U CN208029098 U CN 208029098U
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Abstract
The utility model 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 utility model is related 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, the inventor of the utility model has found that existing wireless sensor is generally limited to volume, electricity
The influence of pond performance keeps its transmission rate relatively low.After improving transmission rate, power consumption sharply increases, and that causes battery uses the longevity
Life, reliability reduce.Also, rechargeable lithium battery is generally used, product operating temperature range is limited to lithium battery operating temperature
Range, battery performance are affected by temperature (low temperature) greatly, low temperature easily occur and do not work phenomenon, cannot be satisfied the real-time of sensor
Property demand.
The information for being disclosed in the background technology part is merely intended to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition has been existing well known to persons skilled in the art
Technology.
Utility model content
The purpose of this utility model is to provide a kind of wireless sensor, wireless sensing methods, and corresponding wireless biography
Sensing system, to the disadvantage more than overcoming.
To achieve the above object, the utility model provides a kind of wireless sensor, including：Detecting signal unit, signal
Amplifying unit, signal conversion unit, micro-control unit, power supply unit and wireless transmission unit, wherein detecting signal unit,
It is changed into electric signal for detecting load signal, and by load signal；Signal amplification unit, for exporting detecting signal unit
Electric signal be amplified；Signal conversion unit is used for amplified electric signal progress analog-to-digital conversion, output digit signals,
And it is transmitted to micro-control unit；Micro-control unit, for being handled the digital signal after analog-to-digital conversion and being formed data packet,
The data packet is transmitted to wireless transmission unit, and control power supply unit to detecting signal unit, signal amplification unit, letter
Number converting unit, wireless transmission unit are powered according to preset mode；Power supply unit, with the detecting signal unit, signal
Amplifying unit, signal conversion unit, micro-control unit and wireless transmission unit are connected, and carry needed for each unit work
Electric 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 utility model additionally provides a kind of wireless sensing system, including above-described wireless sensor, and therewith
The receiver of cooperation, the receiver include transmission unit, are communicated for the wireless transmission unit with wireless sensor,
It is constantly in reception state.
Compared with prior art, the utility model has the advantages that：First, in the technical solution of the utility model
The load uploading rate of use is up to 50 times/second, and the upload number that technology uses now is most soon for 2 times/second, therefore, this reality
Transducing signal can be obtained more in real time with novel；Secondly, the fusion using a variety of power supply plans of the utility model so that
Temperature applicable range is wider, can meet harsher use environment, is switched over to power supply plan under different operating environment, can
Work in -50 DEG C~80 DEG C；And in the utility model, since sample frequency and transmission frequency can be adjusted, and use
Component with work and suspend mode both of which so that so that product power consumption is extremely low, and matches more battery integration technologies, make
The utility model is obtained to remain to keep normal work in extreme 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 utility model.
Specific implementation mode
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail, it is to be understood that this practicality
Novel protection domain 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, according to the wireless sensor of specific embodiment of the present invention include signal detection amplifying circuit,
Conversion circuit, micro-control unit MCU, power supply module and wireless transport module, below to the detailed knot of the wireless sensor
Structure and working method illustrate.
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 solutions of the utility model, it is necessary to which energy consumption includes that each unit is stopped
The uncontrollable hardware energy consumption of energy consumption and other hardware when dormancy amounts 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 utility model is adjustable, the ratio N of transmission frequency and sample frequency can
It adjusts, 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).
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
Many change and variations.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can realize and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (6)
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 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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| CN201820722611.0U CN208029098U (en) | 2018-05-15 | 2018-05-15 | Wireless sensor, wireless sensing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108684008A (en) * | 2018-05-15 | 2018-10-19 | 北京国科舰航传感技术有限公司 | Wireless sensor, wireless sensing system and wireless sensing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108684008A (en) * | 2018-05-15 | 2018-10-19 | 北京国科舰航传感技术有限公司 | Wireless sensor, wireless sensing system and wireless sensing method |
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