CN202033660U - Household monitor wireless sensor terminals powered by solar energy - Google Patents

Household monitor wireless sensor terminals powered by solar energy Download PDF

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Publication number
CN202033660U
CN202033660U CN 201120032497 CN201120032497U CN202033660U CN 202033660 U CN202033660 U CN 202033660U CN 201120032497 CN201120032497 CN 201120032497 CN 201120032497 U CN201120032497 U CN 201120032497U CN 202033660 U CN202033660 U CN 202033660U
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CN
China
Prior art keywords
circuit
wireless senser
power supply
charging
solar panel
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CN 201120032497
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Chinese (zh)
Inventor
周华飞
黄何涛
倪一清
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香港理工大学深圳研究院
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Priority to CN 201120032497 priority Critical patent/CN202033660U/en
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Publication of CN202033660U publication Critical patent/CN202033660U/en

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Abstract

Household monitor wireless sensor terminal powered by solar energy are applied to an intelligent household system including wireless sensor terminals (2) and a data management server. The wireless sensor terminals (2) are distributed in any household places, responsible for collecting information and carrying out data exchange with the data management server; the power supply model (1) of each of the wireless sensor terminals (2) comprises a solar cell panel (11), a lithium polymer cell (12), an external power supply adaptor (13) and an energy management module (14); the solar cell panel (11), lithium polymer cell (12) and the external power supply adaptor (13) are electrically connected with the energy management module (14), respectively, and the energy management module (14) supplies power to the wireless sensor terminals (2). The household monitor wireless sensor terminals powered by solar energy effectively utilize solar energy, and supply power to the sensor terminals through an external power supply and the lithium polymer cell when the solar energy is insufficient, thus ensuring the continuous operation of the sensor terminals at night and cloudy or rainy days.

Description

Solar powered household monitoring wireless senser terminal is arranged
Technical fieldThe utility model relates to the member of measured value or similar signal transmission, particularly relates to the electric signal transmitting device, and solar powered household monitoring wireless senser terminal is especially arranged.
Background technologySupervisory system in the wireless sensor network Smart Home is made up of a large amount of wireless senser terminals and the cable network that are deployed in household inside.Wherein the wireless senser terminal is responsible for information acquisition and is formed self-organizing network with intercoming mutually.When certain sensor terminal detected information, data were routed to network coordinator along other wireless senser terminal hop-by-hop ground transmission through behind the multi-hop, and last network coordinator arrives data management server by the internet with data transmission.Each wireless senser terminal all is the micro-system of a function such as integrated information collection, data processing and wireless telecommunications.
But wireless sensor network have ad hoc networking, disguised strong, low in energy consumption, exempt from characteristics such as wiring, in Smart Home monitoring field advantageous technical advantage is arranged.
The wireless senser terminal adopts the battery of finite capacity that energy is provided usually.But in wireless intelligent house supervisory system the inside, wireless sensor network has that terminal number is huge, distributed areas are wide, so utilize the artificial modes such as battery, charging of changing to come makeup energy to bring very big inconvenience to the user.When the depleted of energy of carrying, the wireless senser terminal can't be finished preset task, this has limited sensor network applying in wireless intelligent house supervisory system field, realize the practicability of wireless sensor network, just must solve this energy bottleneck problem in intelligent machine household supervisory system.
Utilizing sun power supply is a solution.Outdoor, in the middle of the spacious environment, sun power is a lot of to the scheme of sensor terminal power supply.But have only in the middle of these schemes when enough strong their effect of competence exertion of sunshine, when sunlight intensity not enough or can not direct irradiation on solar panel, prior art solar powered will be not enough to satisfy the working sensor needs.
Existence being arranged for the case of power electronic equipment at indoor solar, mainly is to be used for wireless mouse, Wireless Keyboard and the minimum electronic equipment of some power consumptions.Sun power is given in the scheme of wireless senser terminal power supply at present, and the output voltage of solar panel is generally at 3V to 6V.But under the situation of indoor light deficiency, the output voltage of solar panel is less than 3V, and therefore, present solar powered scheme can't provide reliable electric power to supply with to the wireless senser terminal.
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 and produce a kind of solar powered household monitoring wireless senser terminal that has, and has solved indoor problem from sun power to the power supply of wireless senser terminal that can't use in the prior art.
The utility model is to solve the problems of the technologies described above the technical scheme that proposes to be, design a kind of solar powered household monitoring wireless senser terminal that has, be applied to comprise the intelligent domestic system of wireless senser terminal and data management server, described wireless senser terminal is distributed in household everywhere, is responsible for information acquisition and carries out exchanges data with data management server; It is described that each is wireless
The supply module of sensor terminal comprises solar panel, lithium polymer battery, external power adapter and energy management module; Described solar panel, lithium polymer battery, external power adapter are electrically connected to described energy management module respectively, are powered to described wireless senser terminal by this energy management module.
Described solar panel collects solar energy or other transform light energy become electric energy to transmit the energy management module, is described lithium polymer battery charging through the energy management module, and to described wireless senser terminal power supply; When described solar panel provides power shortage, convert electric main to direct current by external power adapter and be sent to the energy management module, to described wireless senser terminal power supply; When described solar panel and external power adapter all can't provide electricity, be described Smart Home wireless sensor node power supply by described lithium polymer battery.
Described solar panel, lithium polymer battery and external power adapter are to be electrically connected with described energy management module with connector, and this connector comprises connector.
Described energy management module comprises charging commutation circuit, charging circuit, power supply commutation circuit and mu balanced circuit; Described solar panel and external power adapter are connected to the charging commutation circuit respectively, select one of described solar panel and external power adapter, power by this charging commutation circuit to described charging circuit, and to the lithium polymer battery charging that is connected with this charging circuit; Described solar panel is connected the power supply commutation circuit respectively with external power adapter, selected one of described solar panel and external power adapter, powered to described mu balanced circuit by this power supply commutation circuit, this mu balanced circuit provides required direct current power to coupled described wireless senser terminal.
Described charging commutation circuit comprises field effect transistor Q1 and voltage stabilizing diode D3, resistance R 1 and change-over switch S1; The positive pole output of external power adapter connects the grid of described transistor Q1, and energising resistance R1 ground connection; The drain electrode of described transistor Q1 connects the positive pole of described solar panel, and its source electrode meets the moving contact C of change-over switch S1; Described voltage stabilizing diode D3 is connected across between the grid and source electrode of transistor Q1, and its anode connects grid; Two stationary contact A, the B of described change-over switch S1 inserts described charging circuit and power supply commutation circuit respectively.
Described charging circuit comprises extra low voltage boosting type converter U3, and delivering to described power supply commutation circuit after the electric energy that this integrated circuit U3 sends described charging commutation circuit here boosts is the mu balanced circuit power supply, and simultaneously to described lithium polymer battery charging.
Described power supply commutation circuit comprises field effect transistor Q2 and voltage stabilizing diode D5, resistance R 0; The grid of described transistor Q1 is connected the stationary contact B of described change-over switch S1, and through resistance R 0 ground connection, its drain electrode connects the positive pole of described lithium polymer battery; Cross-over connection voltage stabilizing diode D5 between the grid of transistor Q1 and source electrode, the anode of voltage stabilizing diode D5 connects grid; Described transistor Q1 source electrode connects described mu balanced circuit.
Described mu balanced circuit comprises the DC/DC voltage transitions and stablizes integrated circuit U 1 and U2, the source electrode of the field effect transistor Q2 of described power supply commutation circuit is connected on described DC/DC voltage transitions and stablize the input end of integrated circuit U 1 and U2 respectively, and the voltage that converts 5V and 3.3V respectively to is powered to described wireless senser terminal.
Described field effect transistor Q1 and Q2 are the P-channel enhancement type field effect transistors.
The beneficial effects of the utility model are: solar panel can be converted into electric energy with solar radiation, is the power supply of wireless senser terminal, thereby can prolongs the serviceable life of wireless senser terminal.When the solar panel function is sufficient, when can be embodied as the sensor terminal power supply lithium polymer battery charging; When the solar panel insufficiency of function, be the sensor terminal power supply by lithium polymer battery.When the lithium polymer battery electric weight has consumed and solar panel can't in time charge for it time, can also be the lithium polymer battery charging by external power adapter, external power adapter can also be powered for system simultaneously.Like this, sensor terminal night, overcast and rainy also can continuous working.The energy management module comprises the interface of solar panel, lithium polymer battery, external power adapter and sensor terminal appointment, plug and play, simple operations.
Description of drawingsFig. 1 is the logical organization synoptic diagram that the utility model has solar powered household monitoring wireless senser terminal preferred embodiment;
Fig. 2 is the logical organization synoptic diagram of the supply module 1 of described preferential embodiment;
Fig. 3 is the circuit theory synoptic diagram that electricity 143 is switched in charging commutation circuit 141, charging circuit 142 and the power supply of the energy management module 14 of described preferred embodiment;
Fig. 4 is the circuit theory synoptic diagram of the mu balanced circuit 144 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 a kind of solar powered household monitoring wireless senser terminal that has, be applied to comprise the intelligent domestic system of wireless senser terminal 2 and data management server, described wireless senser terminal 2 is distributed in household everywhere, is responsible for information acquisition and carries out exchanges data with data management server; The supply module 1 of described each wireless senser terminal 2 comprises solar panel 11, lithium polymer battery 12, external power adapter 13 and energy management module 14; Described solar panel 11, lithium polymer battery 12, external power adapter 13 are electrically connected to described energy management module 14 respectively, are powered to described wireless senser terminal 2 by this energy management module 14.
Described solar panel 11 collects solar energy or other transform light energy become electric energy to transmit energy management module 14, is described lithium polymer battery 12 chargings through energy management module 14, and to described wireless senser terminal 2 power supplies; When described solar panel 11 provides power shortage, convert electric main to direct current by external power adapter 13 and be sent to energy management module 14, to described wireless senser terminal 2 power supplies; When described solar panel 11 and external power adapter 13 all can't provide electric power, be described Smart Home wireless sensor node 2 power supplies by described lithium polymer battery 12.
Described solar panel 11, lithium polymer battery 12 and external power adapter 13 are to be electrically connected with described energy management module 14 with connector, and this connector comprises connector.
Referring to Fig. 2, described energy management module 14 comprises charging commutation circuit 141, charging circuit 142, power supply commutation circuit 143 and mu balanced circuit 144.
Described solar panel 11 and external power adapter 13 are connected to charging commutation circuit 141 respectively, by this charging commutation circuit 141 select described solar panels 11 and external power adapter 13 both one of, to described charging circuit
142 power supplies, and to lithium polymer battery 12 chargings that are connected with this charging circuit 142; Described solar panel 11 is connected power supply commutation circuit 143 respectively with external power adapter 13, by this power supply commutation circuit 143 select described solar panels 11 and external power adapter 13 both one of, to described mu balanced circuit 144 power supplies, this mu balanced circuit 144 provides required direct current power to coupled described wireless senser terminal 2.
Referring to Fig. 3, described charging commutation circuit 141 comprises field effect transistor Q1 and voltage stabilizing diode D3, resistance R 1 and change-over switch S1; The positive pole output of external power adapter 13 connects the grid of described transistor Q1, and energising resistance R1 ground connection; The drain electrode of described transistor Q1 connects the positive pole of described solar panel 11, and its source electrode meets the moving contact C of change-over switch S1; Described voltage stabilizing diode D3 is connected across between the grid and source electrode of transistor Q1, and its anode connects grid; Two stationary contact A, the B of described change-over switch S1 inserts described charging circuit 142 and power supply commutation circuit 143 respectively.
Described charging circuit 142 comprises extra low voltage boosting type converter U3, deliver to described power supply commutation circuit 143 after the electric energy that this integrated circuit U3 sends described charging commutation circuit 141 here boosts and be mu balanced circuit 144 power supplies, and simultaneously to described lithium polymer battery 12 chargings.In this example, U3 is energy collection chip LTC3108, and the LTC3108 topological structure that boosts can operate being low to moderate under the input voltage condition of 20mV.The positive pole of solar panel 11 is connected with the input end of LTC3108 chip periphery circuit, the V of LTC3108 OUTThe pin output terminal passes through the C7 capacitor filtering or connects the positive pole of lithium polymer battery 12.The electric energy of solar panel 11 opto-electronic conversion charges to lithium polymer battery 12 by LTC3108.Referring to Fig. 3, described charging circuit 142 is not only can be to lithium polymer battery 12 chargings at solar panel 11, external power adapter 13 also can by this charging circuit 142 to, but this circuit design fundamental purpose is to be charged as the core design circuit with solar panel 11 to lithium polymer battery 12.
Described power supply commutation circuit 143 comprises field effect transistor Q2 and voltage stabilizing diode D5, resistance R 0; The grid of described transistor Q1 is connected the stationary contact B of described change-over switch S1, and through resistance R 0 ground connection, its drain electrode connects the positive pole of described lithium polymer battery 12; Cross-over connection voltage stabilizing diode D5 between the grid of transistor Q1 and source electrode, the anode of voltage stabilizing diode D5 connects grid; Described transistor Q1 source electrode connects described mu balanced circuit 144.
This routine described field effect transistor Q1 and Q2 are the P-channel enhancement type field effect transistors.
Referring to Fig. 3, the groundwork state of described energy management module 14 is:
(1) external power adapter 13 is linked into connector J1, solar panel is linked into connector J2, both equal normal power supplies, when the moving contact C end of change-over switch S1 and stationary contact A conducting: the transistor Q1 of charging commutation circuit 141 delivers to forward voltage by connecing with external power adapter 13, make the not conducting of this transistor Q1 drain-source utmost point, this moment, solar panel 11 was not powered to charging circuit 142, and the direct current energy that external power adapter provides charges for lithium polymer battery B1 by extra low voltage boosting type converter U3 and peripheral circuit and is mu balanced circuit 144 power supplies.Because being connected on transistor Q13 grid voltage VOUT2 voltage is low-voltage, the drain-source interpolar conducting of transistor Q13, the VOUT1 of the commutation circuit of promptly powering 143 and VOUT conducting.
(2) external power adapter 13 is linked into connector J1, solar panel is linked into connector J2, both equal normal power supplies, when the moving contact C of change-over switch S1 and stationary contact B end were logical: the transistor Q1 of charging commutation circuit 141 delivered to forward voltage by connecing with external power adapter 13, make the not conducting of this transistor Q1 drain-source utmost point, this moment, solar panel 11 was not powered to charging circuit 142, charging circuit 142 not work this moment; Directly the power grid of Q2 of commutation circuit 143 of the direct current energy that external power adapter provides makes the not conducting of the transistor Q2 drain-source utmost point, and it is directly powered to mu balanced circuit.
(3) external power adapter 13 is linked into connector J1, and solar panel is linked into connector J2, both equal malfunctions (promptly not having voltage output); When change-over switch S1 moving contact C and stationary contact B conducting:
This moment, external power adapter 13 and solar cell 11 did not all have voltage output, and charging commutation circuit 141 no electric energy output to described charging circuit 142 and power supply commutation circuit 143; The grid of the Q2 of described power supply commutation circuit 143 is an electronegative potential at this moment, makes the conducting of the transistor Q2 drain-source utmost point, and lithium polymer battery 12 is mu balanced circuit 144 power supplies.
Therefore, when the circuit initial setting of this example, the setting situation is as follows: solar panel 11 is linked into J2 end, the moving contact C of change-over switch S1 and stationary contact A conducting always; If the mains supply interface is arranged near the wireless senser terminal and makes things convenient for external power adapter 13 to connect, this moment, external power adapter 13 can directly be linked into civil power (this kind situation is special circumstances, is not have civil power to insert around the general wireless terminal).
So, the working condition of entire circuit is: when luminosity is enough, solar panel 11 is that lithium polymer battery 13 chargings are mu balanced circuit 144 power supplies simultaneously by charging circuit 142, can't export enough energy when solar panel 11 is lithium polymer battery when charging, and lithium polymer battery is the mu balanced circuit power supply.
Referring to Fig. 4, described mu balanced circuit 144 comprises the DC/DC voltage transitions and stablizes integrated circuit U 1 and U2, the source electrode of the field effect transistor Q2 of described power supply commutation circuit 143 is connected on described DC/DC voltage transitions respectively and stablizes the input end of integrated circuit U 1 and U2, and the voltage that converts 5V and 3.3V respectively to is to described wireless senser terminal 2 power supplies, also the i.e. 3.3V voltage that needs of the 5V voltage that needs of these wireless senser terminal 2 working sensors and wireless senser management node.
In the present embodiment, the DC/DC voltage transitions of mu balanced circuit 144 is the L6920D that uses ST company with stablizing integrated circuit U 1 and U2.The pin explanation of L6920D is as shown in table 1.
The explanation of table 1L6920D pin
Pin Function
FB Pressure feedback port, ground connection is output as 5V, meets Vout and is output as 3.3V
LBI Battery voltage detection input end V LBI=1.23V(1+R 2/ R 3)
LBO When VLBI is lower than 1.23V, output low level, notice CPU prepares.
REF 1.23V reference voltage need add the shunt capacitance of 0.1uF between ground, be used to filter high frequency noise
SHDN The outage input end.Power down when input voltage is lower than 0.2V, operate as normal when being higher than 0.6V
GND Ground connection
LX The boost inductance link
OUT Power output end
Used main components and parts in the circuit theory diagrams of this described Fig. 3 and Fig. 4, as shown in table 2:
The main components and parts of table 2
Title Model Number in the figure
Transistor SI 2301 Q1、Q2
Voltage stabilizing diode 1N5817 D3、D5
DC/DC voltage transitions and stable integrated circuit L6920D U1、U2
Extra low voltage boosting type converter U3 LTC3108 U3
Lithium polymer battery LP753048 B1
Said process is the preferred implementation procedure of the utility model, common variation and alternative being included within the protection domain of the present utility model that those skilled in the art carries out basically at the utility model.

Claims (9)

1. one kind has solar powered household monitoring wireless senser terminal, be applied to comprise the intelligent domestic system of wireless senser terminal (2) and data management server, described wireless senser terminal (2) is distributed in household everywhere, is responsible for information acquisition and carries out exchanges data with data management server; It is characterized in that:
The supply module (1) of described each wireless senser terminal (2) comprises solar panel (11), lithium polymer battery (12), external power adapter (13) and energy management module (14); Described solar panel (11), lithium polymer battery (12), external power adapter (13) are electrically connected to described energy management module (14) respectively, are powered to described wireless senser terminal (2) by this energy management module (14);
Described solar panel (11) collects solar energy or other transform light energy become electric energy to transmit energy management module (14), through energy management module (14) is described lithium polymer battery (12) charging, and powers to described wireless senser terminal (2);
When described solar panel (11) when power shortage is provided, convert electric main to direct current by external power adapter (13) and be sent to energy management module (14), power to described wireless senser terminal (2);
When described solar panel (11) and external power adapter (13) all can't provide electric power, be described Smart Home wireless sensor node (2) power supply by described lithium polymer battery (12).
2. there is solar powered household to monitor the wireless senser terminal according to claim 1 is described, it is characterized in that:
Described solar panel (11), lithium polymer battery (12) and external power adapter (13) are to be electrically connected with described energy management module (14) with connector, and this connector comprises connector.
3. described solar powered household monitoring wireless senser terminal arranged according to claim 1 or 2, it is characterized in that:
Described energy management module (14) comprises charging commutation circuit (141), charging circuit (142), power supply commutation circuit (143) and mu balanced circuit (144);
Described solar panel (11) and external power adapter (13) are connected to charging commutation circuit (141) respectively, by this charging commutation circuit (141) select described solar panel (11) and external power adapter (13) both one of, to described charging circuit (142) power supply, and to lithium polymer battery (12) charging that is connected with this charging circuit (142);
Described solar panel (11) is connected power supply commutation circuit (143) respectively with external power adapter (13), by this power supply commutation circuit (143) select described solar panel (11) and external power adapter (13) both one of, to described mu balanced circuit (144) power supply, this mu balanced circuit (144) provides required direct current power to coupled described wireless senser terminal (2).
4. there is solar powered household to monitor the wireless senser terminal according to claim 3 is described, it is characterized in that:
Described charging commutation circuit (141) comprises field effect transistor Q1 and voltage stabilizing diode D3, resistance R 1 and change-over switch S1; The positive pole output of external power adapter (13) connects the grid of described transistor Q1, and energising resistance R1 ground connection; The drain electrode of described transistor Q1 connects the positive pole of described solar panel (11), and its source electrode meets the moving contact C of change-over switch S1; Described voltage stabilizing diode D3 is connected across between the grid and source electrode of transistor Q1, and its anode connects grid; Two stationary contact A, the B of described change-over switch S1 inserts described charging circuit (142) and power supply commutation circuit (143) respectively.
5. there is solar powered household to monitor the wireless senser terminal according to claim 3 is described, it is characterized in that:
Described charging circuit (142) comprises extra low voltage boosting type converter U3, deliver to described power supply commutation circuit (143) after the electric energy that this integrated circuit U3 sends described charging commutation circuit (141) here boosts and be mu balanced circuit (144) power supply, and charge to described lithium polymer battery (12) simultaneously.
6. there is solar powered household to monitor the wireless senser terminal according to claim 3 is described, it is characterized in that:
Described power supply commutation circuit (143) comprises field effect transistor Q2 and voltage stabilizing diode D5, resistance R 0; The grid of described transistor Q1 is connected the stationary contact B of described change-over switch S1, and through resistance R 0 ground connection, its drain electrode connects the positive pole of described lithium polymer battery (12); Cross-over connection voltage stabilizing diode D5 between the grid of transistor Q1 and source electrode, the anode of voltage stabilizing diode D5 connects grid; Described transistor Q1 source electrode connects described mu balanced circuit (144).
7. there is solar powered household to monitor the wireless senser terminal according to claim 3 is described, it is characterized in that:
Described mu balanced circuit (144) comprises the DC/DC voltage transitions and stablizes integrated circuit U 1 and U2, the source electrode of the field effect transistor Q2 of described power supply commutation circuit (143) is connected on described DC/DC voltage transitions and stablize the input end of integrated circuit U 1 and U2 respectively, and the voltage that converts 5V and 3.3V respectively to is powered to described wireless senser terminal (2).
8. there is solar powered household to monitor the wireless senser terminal according to claim 4 is described, it is characterized in that:
Described field effect transistor Q1 is the P-channel enhancement type field effect transistor.
According to claim 6 state solar powered households monitoring wireless senser terminal arranged, it is characterized in that:
Described field effect transistor Q2 is the P-channel enhancement type field effect transistor.
CN 201120032497 2011-01-30 2011-01-30 Household monitor wireless sensor terminals powered by solar energy CN202033660U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102592425A (en) * 2012-02-27 2012-07-18 苏州明上系统科技有限公司 Zigbee wireless communication manager
CN102595656A (en) * 2012-02-27 2012-07-18 苏州明上系统科技有限公司 Zigbee wireless communication relay
CN104682540A (en) * 2014-12-30 2015-06-03 北京长城金点投资发展有限公司 Sensor
CN104949775A (en) * 2015-06-30 2015-09-30 成都众山科技有限公司 Wireless pressure transmitter based on Internet of Things
CN104978844A (en) * 2015-06-30 2015-10-14 成都众山科技有限公司 Wireless industrial liquid level transmitter
CN105067131A (en) * 2015-06-30 2015-11-18 成都众山科技有限公司 Wireless temperature transmitter with hybrid power supply
TWI568288B (en) * 2015-07-24 2017-01-21 臺灣塑膠工業股份有限公司 Wireless sensor system for integration into buildings
CN107148087A (en) * 2017-03-29 2017-09-08 南京邮电大学 Self-powered Temperature Humidity Sensor network based on solar energy collecting

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102592425A (en) * 2012-02-27 2012-07-18 苏州明上系统科技有限公司 Zigbee wireless communication manager
CN102595656A (en) * 2012-02-27 2012-07-18 苏州明上系统科技有限公司 Zigbee wireless communication relay
CN104682540A (en) * 2014-12-30 2015-06-03 北京长城金点投资发展有限公司 Sensor
CN104949775A (en) * 2015-06-30 2015-09-30 成都众山科技有限公司 Wireless pressure transmitter based on Internet of Things
CN104978844A (en) * 2015-06-30 2015-10-14 成都众山科技有限公司 Wireless industrial liquid level transmitter
CN105067131A (en) * 2015-06-30 2015-11-18 成都众山科技有限公司 Wireless temperature transmitter with hybrid power supply
TWI568288B (en) * 2015-07-24 2017-01-21 臺灣塑膠工業股份有限公司 Wireless sensor system for integration into buildings
CN107148087A (en) * 2017-03-29 2017-09-08 南京邮电大学 Self-powered Temperature Humidity Sensor network based on solar energy collecting

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