CN202035015U - Wireless network compatible health monitoring sensing module group with low energy consumption and high precision - Google Patents
Wireless network compatible health monitoring sensing module group with low energy consumption and high precision Download PDFInfo
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- CN202035015U CN202035015U CN201120029500XU CN201120029500U CN202035015U CN 202035015 U CN202035015 U CN 202035015U CN 201120029500X U CN201120029500X U CN 201120029500XU CN 201120029500 U CN201120029500 U CN 201120029500U CN 202035015 U CN202035015 U CN 202035015U
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Abstract
A wireless network compatible health monitoring sensing module group with low energy consumption and high precision is used for connecting a sensor (3) with the wireless sensor network node platform (4) thereof, comprising an amplification plate (1) and an analog digital conversion plate (2) which are detachable, wherein the amplification plate (1) receives an analog sensing signal send by the sensor (3) from the input end, then carries out amplitude adjustment, and transmits the analog sensing signal to the analog digital conversion plate (2) through a connector, the analog digital conversion plate (2) carries out filtering treatment, converts the analog sensing signal into a digital signal, and outputs the digital signal to the wireless sensor network node platform (4). The 1-1000 times of configurable amplification gain provided by the amplification plate of the module group may reliably detect and receive a millivolt level weak signal, and adjust the weak signal to an amplitude most appropriate to be received by an analog digital converter, thus better ensuring the conversion measuring range of the 16-bit analog-digital converter, and exerting the maximal conversion precision. The filtering mechanism completely satisfies the filtering need of real structure signal, and the flexible programmable configuration greatly reduces the debug and configuration complexity of monitoring site.
Description
Technical fieldThe utility model relates to the member of measured value or similar signal transmission, particularly relates to signal of telecommunication transmitting device, relates in particular to a kind of low energy consumption high-precision configuration health monitoring sensing module of wireless network compatibility.
Background technologyThe Imote2 radio sensing network node platform of Ke Ersibo Crossbow is at current the most powerful, the most widely used wireless sensing platform of performance that become; Its characteristics mainly comprise powerful disposal ability (the highest 400MHz), big capacity storage (256K SRAM, 32MB SDRAM, 32MB Flash), reliable wireless communication ability (16 passages, the highest 250Kbps that supports); But this Imote2 radio sensing network node platform but has only a very simple sensors plate ITS400, and 4 passages, 12 ADC(analog-to-digital conversion are provided).Because this ITS400 is 12 ADC and lacks amplification and filtering mechanism, extensive use in the limitation ITS400 reality, particularly the building structure health monitoring (Structural Health Monitoring, SHM) in, transducing signal faint (millivolt) and be the environment of high background noise.For example, in the structural healthy monitoring system of our ongoing Guangzhou television tower, high-precision accelerometer AS-2000C) output is 0.05gal (1g=1000gal), that is to say, the output of AS-2000C only has 0.0625 millivolt, at this moment, because sensor board ITS400 precision deficiency, can not transmit the faint variation of sensor signal thereby can't be used.Though so Imote2 has superpower processing/communication capacity, be subjected to the functional limitation of its sensor board, have the not high problem of sensing accuracy.
For addressing this problem, champagne branch school, University of Illinois is at Imote2 design sensor board SHM-A (list of references: Li B., Wang D., and Ni Y.Q., " Demo:An Imote2 compatible high fidelity sensing module for SHM sensor networks, " Proceedings of the 37th IEEE Communication Conference (IEEE INFCOM2010)).This is integrated fixed sensing above SHM-A sensor board, comprises acceleration, light and temperature sensor; But open channel that what deserves to be mentioned is SHM-A has only one, and enlarging function at 1-8 doubly, in above-mentioned monitoring structural health conditions practical application, also still has the non problem of wireless sensing platform when signal is too faint.
The utility model contentThe technical problems to be solved in the utility model is to avoid above-mentioned the deficiencies in the prior art part and designs the low energy consumption high-precision configuration health monitoring sensing module of producing a kind of wireless network compatibility, has solved in the prior art the non problem of small-signal.
The utility model is to solve the problems of the technologies described above the technical scheme that proposes to be, a kind of low energy consumption high-precision configuration health monitoring sensing module of wireless network compatibility, be applied to being connected of transducer and its wireless sensor network node platform, comprise two blocks of separable amplification plates and analog-to-digital conversion plate; Described amplification plate input receives the analog sensed signal that described transducer sends, and after amplitude is regulated, is transported to the analog-to-digital conversion plate by connector, through Filtering Processing and convert digital signal to, outputs in the described wireless sensor network node platform.
Described amplification plate comprises amplification power supply circuits and amplifying circuit; The pressurizer U10 of described power supply circuits will be converted to the 3.3V direct current from the 5V direct current that connector J1 receives, or the 3.3V direct current that described analog-to-digital conversion plate is delivered to through connector is directly to described amplifying circuit power supply, simultaneously, this 3.3V direct current also is transported to the input of each reference voltage chip U5～U9, be converted to the 2.5V reference voltage, insert the reference voltage pin of the amplifier chip U1～U4 of described amplifying circuit more respectively; The analog signal of described each sensor senses is delivered to the positive and negative input pin of single supply instrument amplifier U1～U4 respectively behind four input connector J2～J5 and subsequent the filtering of RC filter circuit of described amplifying circuit; Through the output pin OUT output of amplified analog signal, and deliver to the output connector J7 of amplifying circuit by this amplifier U1～U4 respectively.
Described analog-to-digital conversion plate comprises modulus power supply circuits and analog to digital conversion circuit; The pressurizer U11 of described modulus power supply circuits will be converted to the 3.3V direct current from the 5V direct current that connector J8 receives or will directly be powered to analog-digital conversion circuit as described through the 3.3V direct current that connector J10 delivers to by described wireless sensor network node platform, simultaneously, the direct current of described 3.3V also inserts the reference voltage circuit chip U12 input of modulus power supply circuits, converts filtering and modulus conversion chip U13 that the 1.8V direct current is supplied with analog-digital conversion circuit as described to; Described analog-to-digital conversion plate input connector J12, to deliver to the filtering of analog to digital conversion circuit and each positive and negative input pin of modulus conversion chip U13 respectively by the signal that amplifying circuit is delivered to, through this filtering and modulus conversion chip U13 filtering and convert digital signal to, deliver to output connector J9.
Described reference voltage circuit chip U5～U8 is the low positive pressurizer of pressure reduction, and model is LM4132A-2.5.
Described amplifier chip U1～U4 provides the adjustable gain in 1-1000 times of amplification range, comprises the instrument amplifier AD623 of low-power consumption track to track.
Described pressurizer U10 and U11 adopt the low positive pressurizer of pressure reduction, comprise model REG1117-3.3.
Described analog-to-digital conversion plate adopts SPI full duplex synchronous serial bus to connect with described wireless sensor network node.
Described filtering and modulus conversion chip U13 are 4 passages, have the programmable analog/digital signal conversion device that limit for length's unit impulse response FIR filter is arranged, comprise QF4A512.
Described wireless sensor network node platform comprises the Imote2 wireless sensor network node platform of Ke Ersibo Crossbow.
The beneficial effects of the utility model are: adopt 16 A/D conversion accuracies of this module guaranteeing that fundamentally this plate sensing module can obtain the sensing accuracy higher than ITS400; In actual applications, amplify the doubly configurable gain amplifier of 1-1000 that plate provides in conjunction with this module, this sensing module can detect and receive the small-signal of millivolt level reliably and this small-signal is nursed one's health the amplitude that the most suitable analog to digital converter receives, thereby the conversion range of best 16 analog to digital converters of assurance the design has been given play to maximum conversion accuracy.The design's filtering mechanism has satisfied the filtering needs of real structure signal fully, and its programmable configuration flexibly, also greatly reduces monitoring on-the-spot debugging and configuration complexity.
Description of drawingsFig. 1 is the logic interfacing schematic diagram of the preferred embodiment of the low energy consumption high-precision configuration health monitoring sensing module of a kind of wireless network compatibility of the utility model when being applied in radio sensing network node Imote2 platform;
Fig. 2 is the circuit theory schematic diagram of the amplification plate 1 of described preferred embodiment;
Fig. 3 is the circuit theory schematic diagram of the analog-to-digital conversion plate 2 of described preferred embodiment.
EmbodimentBelow, the preferred embodiment shown in is further set forth the utility model in conjunction with the accompanying drawings.
Referring to Fig. 1, the preferred embodiment of the utility model is, design, make a kind of low energy consumption high-precision configuration health monitoring sensing module of wireless network compatibility, be applied to being connected of transducer 3 and its wireless sensor network node platform 4, comprise two blocks of separable amplification plates 1 and analog-to-digital conversion plate 2; Described amplification plate 1 input receives the analog sensed signal that described transducer 3 sends, and after amplitude is regulated, is transported to analog-to-digital conversion plate 2 by connector, through Filtering Processing and convert digital signal to, outputs in the described wireless sensor network node platform 4.
With reference to figure 2, described amplification plate 1 comprises amplification power supply circuits 11 and amplifying circuit 12; The pressurizer U10 of described power supply circuits 11 is converted to the 3.3V direct current with the 5V direct current that connector J1 receives, or the 3.3V direct current that described analog-to-digital conversion plate 2 is delivered to through connector is directly to described amplifying circuit 12 power supplies, simultaneously, this 3.3V direct current also is transported to the input of each reference voltage chip U5～U9, be converted to the 2.5V reference voltage, insert the reference voltage pin of the amplifier chip U1～U4 of described amplifying circuit 12 more respectively; The analog signal of described each transducer 3 perception is delivered to the positive and negative input pin of single supply instrument amplifier U1～U4 respectively behind the connector J2～J5 and subsequent the filtering of RC filter circuit of four inputs of described amplifying circuit 12; Through the output pin OUT output of amplified analog signal, and deliver to the output connector J7 of amplifying circuit 12 by this amplifier U1～U4 respectively.
Amplify plate and be to aim at and amplify faint small-signal and design: described amplifier chip U1～U4 provides the adjustable gain in 1-1000 times of amplification range, comprises the instrument amplifier AD623 of low-power consumption track to track.Described pressurizer U10 adopts the low positive pressurizer of pressure reduction, comprises model REG1117-3.3.
Unlike the prior art, but above-mentioned custom-designed amplification module has comparatively excellent input range and input precision, and is as shown in table 1.Comparison in the table 1 has comprised the amplification plate 1 that we design, the ITS400 sensor board of commercial distribution, and another champagne branch school, University of Illinois is at the sensor board SHM-A of Imote2 design.Integrated fixed sensing comprises acceleration, light and temperature sensor above the SHM-A sensor board; But open channel that what deserves to be mentioned is SHM-A has only one, and enlarging function at 1-8 doubly, in above-mentioned monitoring structural health conditions practical application, to such an extent as to will be in the face of the too faint non difficulty of small-signal.The function that ITS400, SHM-A and the design amplify module contrasts as shown in table 1.
Table 1. ITS400, SHMA and the design amplify the plate performance relatively
| Title | ITS 400 | SHM-A | The design amplifies plate | |
| Amplify | N/A | 1-8 | 1-1000 | |
| Configuration | N/A | N/A | Maximum 12 kinds are amplified selection | |
| Perceived | 100mV | 100 mV | 1 mV |
This amplification plate 1 has used the instrument amplifier AD623 of low-power consumption track to track, except his low-power consumption characteristics, the characteristics that the AD623 another one is worth mentioning are its employing one pole power supplies, therefore also just avoid the negative voltage power supply on the circuit, therefore reduced the complexity of design/debugging greatly.In the design, the reference voltage of AD623 adopts reference voltage circuit chip U5～U8, and model provides for LM4132A-2.5, and this reference voltage chip provides the reference voltage of 2.5V, guarantees under the one pole power supply negative voltage to be nursed one's health positive voltage.The duplicate supply scheme of multi-redundant has been adopted in the power supply design of amplifying plate, and amplification plate 1 both can have been accepted the 3.3V voltage from lower floor's analog-to-digital conversion plate 2, directly accepts outside direct current 3.3V power supply by connector again.Amplify the core components and parts of plate 1, model and schematic diagram label are as shown in table 2.
Table 2. amplifies plate 1 core components and parts title, model and schematic diagram label
| Title | Model | The schematic diagram label | |
| Amplify chip | AD623 | U1，U2，U3，U4 | |
| Power supply chip | REG1117-3.3 | U10 | |
| The reference voltage chip | LM4132A-2.5 | U5，U6，U7，U8 | |
| Connect the filter | DIP | 16 Header | J7 |
| Fuse | ?FUSE | F1，F2 |
With reference to figure 2, described analog-to-digital conversion plate 2 comprises modulus power supply circuits 21 and analog to digital conversion circuit 22; The pressurizer U11 of described modulus power supply circuits 21 is converted to the 3.3V direct current with the 5V direct current that connector J8 receives, or will directly power through the 3.3V direct current that connector J10 delivers to by described wireless sensor network node platform 4 to analog-digital conversion circuit as described 22, simultaneously, the direct current of described 3.3V also inserts the reference voltage circuit chip U12 input of modulus power supply circuits 21, converts filtering and modulus conversion chip U13 that the 1.8V direct current is supplied with analog-digital conversion circuit as described 22 to; Described analog-to-digital conversion plate 2 input connector J12, to deliver to the filtering of analog to digital conversion circuit 22 and each positive and negative input pin of modulus conversion chip U13 respectively by the signal that amplifying circuit 1 is delivered to, through this filtering and modulus conversion chip U13 filtering and convert digital signal to, deliver to output connector J9.
Described analog-to-digital conversion plate 2 adopts SPI full duplex synchronous serial bus to connect with described wireless sensor network node 4.Described filtering and modulus conversion chip U13 are employing 4 passages, have the programmable analog/digital signal conversion device that limit for length's unit impulse response FIR filter is arranged, comprise QF4A512.Described pressurizer U11 adopts the low positive pressurizer of pressure reduction, comprises model REG1117-3.3.The Imote2 wireless sensor network node platform that described wireless sensor network node platform 4 is Ke Ersibo Crossbow.
Structural healthy monitoring system in true generally requires 16 or above A/D conversion accuracy, thereby realizes the collection to structure small-signal (for example 1mV).The design's module has used QF4A512, and it supports the analog-to-digital conversion of 16 in 4 passages.Faint except signal amplitude, usually also with stronger background noise, making that signal filtering becomes signals collecting another one simultaneously must condition from the information of real structure.The QF4A512 that this sensing module adopts has an integrated 521-tap FIR filter; Use this filter, can be on-the-spot at the feature of wanting monitor signal in monitoring, carry out real-time filter customization, programming is adjusted, and really realizes real-time customizable filtering.
What deserves to be mentioned is, different with the sensor board of existing wireless network compatibility, the sensing module that the design realizes has adopted wide-open transducer to insert passage, i.e. 4 wide-open 16 analog-to-digital conversion passages, and do not have fixed sensing onboard integrated.Therefore but the scope of application of sensor module obtains very big expansion, and certain concrete monitoring structural health conditions is used only to be needed the transducer of special requirement is inserted this high-precision sensing module, promptly can realize the perception and the collection of signal, finally reaches the purpose of wireless monitor.Table 3 is careful has summed up the difference of plate sensing module and existing sensing module, and emphasis has compared analog-to-digital conversion plate and the ITS400 and the UIUC SHM-A of this module.
Table 3. ITS400, the performance of SHM-A and the design's analog-to-digital conversion plate relatively
| Title | ITS 400 | SHM-A | The design |
| Input signal types | Voltage | Voltage | Voltage |
| Input reference signal (V) | 0-3 | 0-5 | 0-5 |
| Sensing accuracy | 100mV | 100mV | 1 mV |
| The |
4 | 1 | 4 |
| A/D conversion accuracy | 12-bit | 16-bit | 16-bit |
| Filtering | N/A | The highest 512-tap FIR | The highest 512-tap FIR |
| The output signal type | Numeral | Numeral | Numeral |
In the design's sensing module, the core of analog-to-digital conversion plate design is to have adopted the programmable signal converter QF4A512 of 4 passages, this chip is supported the difference/single-ended signal input of 4 passages, 16 programmable analog-to-digital converter, 3.3V/5V compatible input and output level compatibility, and at the array FIR filter that is up to 512-tap of each passage.The design adopts QF4A512 to use for reference the employing of SHM-A to QF4A512, but what deserves to be mentioned is, the design but is very different with SHM-A to the use of QF4A512A: at first the design is devoted to four passages of open fully QF4A512, and SHM-A has but only opened one; The more important thing is, the design is at the input range characteristics of QF4A512A, special design has realized 1-1000 high accuracy amplification module doubly, and employing modularized design, the acquisition precision of whole sensor module has been brought up to 1mV(1000 doubly from 1V), improved acquisition precision greatly, so the design there is the broader applications scope; Have benefited from modularized design, the configuration utility of entire module is also more flexible.The power supply of analog-to-digital conversion plate is similar with the amplification plate, also is to have adopted compatible Imote2 powered battery and outside direct current supply dual mode.The design's analog-to-digital conversion plate core devices information is as shown in table 4.
Table 4. analog-to-digital conversion plate core components and parts title, model and schematic diagram label
| Title | Model | The schematic diagram label | |
| Filtering and modulus conversion chip | QF4A512 | U13 | |
| 3.3V power supply conversion chip | REG1117-3.3 | U11 | |
| 1.8 V power supply chip | TPS79418DGNT | U12 | |
| Connect and amplify connector for | SIP | 8 Header | J12 |
| Fuse | FUSE | F5 | |
| The Imote2 data connector | DF9-31P-1V-1 | J9 | |
| The Imote2 connector of powering | DF9-21P-1V-1 | J10 |
The power consumption analysis of this preferred embodiment:
Acp chip in the design of this sensing module comprises that AD623(amplifies plate) and QF4A512(analog-to-digital conversion/filter band), the power consumption of these two chips also will be dominated the power consumption of this sensing module.Consider AD623 maximum consumption 550 μ A electric currents under the global function operating state, and QF4A512 is under the situation of the sample rate (satisfying real structure health monitoring needs fully) of 1kHz, the maximum current consumption of four whole work of passage is 17mA, take all factors into consideration other possibility power consumptions, the current drain of the sensing module among the design will be about 20mA, this current drain ability will with the power consumption (31mA when not having wireless transmission of Imote2 communication board, and the 66mA of radio function when opening) be in same magnitude, and be significantly less than the Imote2 oneself power consumption.In sum, the power consumption of sensing module when four passages are worked simultaneously that propose of the design only be Imote2 self the communication board power consumption 1/3; Power consumption when the single passage of this sensing module is worked will only be 1/12 of an Imote2 communication board power consumption.Therefore the energy consumption efficiency height of this sensing module is applicable to the health monitoring of Imote2 wireless topology.
The performance verification of this preferred embodiment:
The central characteristics of this sensing module is following 2 points: 1) 16 of this module A/D conversion accuracies are guaranteeing that fundamentally plate sensing module can obtain the sensing accuracy higher than ITS400; 2) in actual applications, amplify the doubly configurable gain amplifier of 1-1000 that plate provides in conjunction with this module, this sensing module can reliable detection and is received the small-signal (AS2000C for example mentioned above detected small-signal on the television tower of Guangzhou) of millivolt level, and this small-signal nursed one's health the amplitude that the most suitable analog to digital converter receives, thereby the conversion range of best 16 analog to digital converters of assurance the design has been given play to maximum conversion accuracy.In contrast be, in the application of above-mentioned small-signal monitoring, ITS400 and SHM-A detect basically less than other small-signal of millivolt level, analog-to-digital precision therefore also just is far from being.
In the real structure health monitoring, except the amplitude of architecture signals is faint, notify accompaniment signal and next strong background noise, also hindered high-precision signals collecting to a certain extent, so signal filtering becomes inevitable.The experience that we set up the large-scale structure health monitoring systems shows that 4 rank capacitance-resistance Bessel filters can satisfy the filtering needs of real structure (for example Guangzhou television tower) substantially.The FIR filter of the highest 512-tap that adopts in this sensing module has satisfied the filtering needs in theory.Experimental verification shows that the design's filtering mechanism has satisfied the filtering needs of real structure signal fully, and its programmable configuration flexibly, also greatly reduces monitoring on-the-spot debugging and configuration complexity.
At how this module being configured, programme and test, we also develop and have recorded one section video, tell about and how to dispose, and use, and test this modularization sensing module.In conjunction with this video, the configuration that the user can this module of very fast association is used and performance verification.
Said process is the preferred implementation procedure of the utility model, common variation and alternative being included within the protection range of the present utility model that those skilled in the art carries out basically at the utility model.
Claims (10)
1. the low energy consumption high-precision configuration health monitoring sensing module of a wireless network compatibility is applied to being connected of transducer (3) and its wireless sensor network node platform (4), it is characterized in that:
Comprise two blocks of separable amplification plates (1) and analog-to-digital conversion plate (2); Described amplification plate (1) input receives the analog sensed signal that described transducer (3) sends, after amplitude is regulated, be transported to analog-to-digital conversion plate (2) by connector, through Filtering Processing and convert digital signal to, output in the described wireless sensor network node platform (4).
2. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 1, it is characterized in that:
Described amplification plate (1) comprises amplification power supply circuits (11) and amplifying circuit (12);
The pressurizer U10 of described power supply circuits (11) will be converted to the 3.3V direct current from the 5V direct current that connector J1 receives, or the 3.3V direct current that described analog-to-digital conversion plate (2) is delivered to through connector directly powered to described amplifying circuit (12), simultaneously, this 3.3V direct current also is transported to the input of each reference voltage chip U5～U9, be converted to the 2.5V reference voltage, insert the reference voltage pin of the amplifier chip U1～U4 of described amplifying circuit (12) more respectively;
The analog signal of described each transducer (3) perception is delivered to the positive and negative input pin of single supply instrument amplifier U1～U4 respectively behind four input connector J2～J5 and subsequent the filtering of RC filter circuit of described amplifying circuit (12); Through the output pin OUT output of amplified analog signal, and deliver to the output connector J7 of amplifying circuit (12) by this amplifier U1～U4 respectively.
3. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 1, it is characterized in that:
Described analog-to-digital conversion plate (2) comprises modulus power supply circuits (21) and analog to digital conversion circuit (22);
The pressurizer U11 of described modulus power supply circuits (21) will be converted to the 3.3V direct current from the 5V direct current that connector J8 receives or will directly be powered to analog-digital conversion circuit as described (22) through the 3.3V direct current that connector J10 delivers to by described wireless sensor network node platform (4), simultaneously, the direct current of described 3.3V also inserts the reference voltage circuit chip U12 input of modulus power supply circuits (21), converts filtering and modulus conversion chip U13 that the 1.8V direct current is supplied with analog-digital conversion circuit as described (22) to;
Described analog-to-digital conversion plate (2) input connector J12, to deliver to the filtering of analog to digital conversion circuit (22) and each positive and negative input pin of modulus conversion chip U13 respectively by the signal that amplifying circuit (1) is delivered to, through this filtering and modulus conversion chip U13 filtering and convert digital signal to, deliver to output connector J9.
4. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 2, it is characterized in that:
Described reference voltage circuit chip U5～U8 is the low positive pressurizer of pressure reduction, and model is LM4132A-2.5.
5. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 2, it is characterized in that:
Described amplifier chip U1～U4 provides the adjustable gain in 1-1000 times of amplification range, comprises the instrument amplifier AD623 of low-power consumption track to track.
6. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 2, it is characterized in that:
Described pressurizer U10 is the low positive pressurizer of pressure reduction, comprises model REG1117-3.3.
7. according to the low energy consumption high-precision configuration health monitoring sensing module of claim 1 or 3 described wireless network compatibilities, it is characterized in that:
Described analog-to-digital conversion plate (2) adopts SPI full duplex synchronous serial bus to connect with described wireless sensor network node (4).
8. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 3, it is characterized in that:
Described filtering and modulus conversion chip U13 are employing 4 passages, have the programmable analog/digital signal conversion device that limit for length's unit impulse response FIR filter is arranged, comprise QF4A512.
9. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 3, it is characterized in that:
Described pressurizer U11 adopts the low positive pressurizer of pressure reduction, comprises model REG1117-3.3.
10. according to the low energy consumption high-precision configuration health monitoring sensing module of the described wireless network compatibility of claim 1, it is characterized in that:
Described wireless sensor network node platform (4) comprises the Imote2 wireless sensor network node platform of Ke Ersibo Crossbow.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495132A (en) * | 2011-12-13 | 2012-06-13 | 东北大学 | Multi-channel data acquisition device for submarine pipeline magnetic flux leakage internal detector |
| CN107657801A (en) * | 2017-10-23 | 2018-02-02 | 兖州东方机电有限公司 | A kind of data collection and transfering system based on LORA |
| CN109060035A (en) * | 2018-08-28 | 2018-12-21 | 重庆大学 | Internet of Things intelligence sensor |
-
2011
- 2011-01-28 CN CN201120029500XU patent/CN202035015U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495132A (en) * | 2011-12-13 | 2012-06-13 | 东北大学 | Multi-channel data acquisition device for submarine pipeline magnetic flux leakage internal detector |
| CN107657801A (en) * | 2017-10-23 | 2018-02-02 | 兖州东方机电有限公司 | A kind of data collection and transfering system based on LORA |
| CN109060035A (en) * | 2018-08-28 | 2018-12-21 | 重庆大学 | Internet of Things intelligence sensor |
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