CN110957790A - Weak light type energy management system, management method and weak light type passive wireless sensor - Google Patents
Weak light type energy management system, management method and weak light type passive wireless sensor Download PDFInfo
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- CN110957790A CN110957790A CN201911358554.8A CN201911358554A CN110957790A CN 110957790 A CN110957790 A CN 110957790A CN 201911358554 A CN201911358554 A CN 201911358554A CN 110957790 A CN110957790 A CN 110957790A
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- 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
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Abstract
The invention relates to a dim light type energy management system, a management method and a dim light type passive wireless sensor, wherein the system comprises a solar energy acquisition module, a boosting and charging management module, an energy storage body and an energy management module, the solar energy acquisition module is connected with the boosting and charging management module, the boosting and charging management module is used for boosting electric energy acquired by the solar energy acquisition module and storing the electric energy into the energy storage body, and the energy management module is connected with the energy storage body and is used for monitoring and stably managing the electric energy of the energy storage body. Solar energy collection module gathers solar energy and converts the electric energy into to utilize and step up and charge the management module and store the energy storage body after stepping up the electric energy, and continuously charge for the energy storage body under the low light condition, then use energy management module to manage the electric energy of the energy storage body, be convenient for monitor output voltage and steady voltage output help improve equipment to last, stably for the sensor energy supply under the condition of low light.
Description
Technical Field
The invention relates to the technical field of sensor power supply, in particular to a weak light type energy management system, a management method and a weak light type passive wireless sensor.
Background
At present, sensors are widely applied to the field of data acquisition, particularly in places with comparative danger such as high-voltage power equipment and lines, and the acquisition of temperature and humidity data and the remote monitoring of the temperature and humidity data are the first steps for realizing automatic monitoring. The traditional active wired sensor cannot meet the requirement of the safety distance of high-voltage power, so that a passive wireless sensor is generally adopted to acquire temperature and humidity data of high-voltage power equipment, but the passive wireless sensor mostly adopts current electricity taking, voltage electricity taking, wireless electricity taking and other modes for power supply, the current electricity taking has a requirement on the magnitude of current, and the equipment cannot work under the condition of low current; the voltage gets electricity, the sensor has a large size and has requirements on voltage level, and equipment with too low voltage cannot work; the wireless power taking distance is short, and the safety distance can be influenced.
The existing CN 101808423A-wireless sensor network node photovoltaic energy autonomous system and the autonomous method thereof, the autonomous system includes: the solar cell panel is directly connected with the capacitor module, and the capacitor module is connected with the charging management module.
The above prior art solutions have the following drawbacks:
1. the capacity of the solar cell panel for continuously charging the capacitor module is insufficient under the condition of weak light, so that the power supply of the sensor is insufficient;
2. lack of monitoring of the power results in unstable power supply to the sensor.
Disclosure of Invention
Aiming at the defects in the prior art, one purpose of the invention is to provide a low-light type energy management system, the other purpose of the invention is to provide a low-light type energy management method of the low-light type energy management system, and the third purpose of the invention is to provide a low-light type passive wireless sensor, which is beneficial to improving the capability of the system for continuously and stably supplying energy to equipment under the condition of low light.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a weak light type energy management system, includes solar energy collection module, steps up and charge management module, the energy storage body, energy management module, solar energy collection module with step up and charge management module links to each other, it is right to step up and charge management module is used for the electric energy that solar energy collection module gathered handles and saves the energy storage body, energy management module with the energy storage body links to each other and is used for right the electric energy of the energy storage body monitors and stable management.
Through adopting above-mentioned technical scheme, solar energy collection module gathers solar energy and converts the electric energy into, and utilize to step up and charge management module and step up the back storage to the energy storage body to the electric energy, and continuously charge for the energy storage body under the low light condition, then use energy management module to manage the electric energy of the energy storage body, thereby be convenient for monitor output voltage and steady voltage output, for other equipment stable power supplies, help improve equipment to last under the condition of low light, stably for the sensor energy supply.
The present invention in a preferred example may be further configured to: the solar energy collection module comprises a single crystal solar panel; the boost and charge management module comprises a boost circuit and a charge management circuit, the boost circuit comprises a boost chip, and the charge management circuit comprises a charge management chip.
Through adopting above-mentioned technical scheme, even single crystal solar panel also can be in the energy storage body through the chip that steps up and charge the management chip and carry out the energy storage that charges continuously under the condition of low light, then for equipment continuous power supply.
The present invention in a preferred example may be further configured to: the boost management chip is connected with the energy storage body through the boost chip, and the boost management chip is connected with the energy storage body through the boost chip.
By adopting the technical scheme, the adjusting resistor is arranged between the boosting chip and the charging management chip, the output voltage of the boosting chip can be improved by adjusting the resistance value of the resistor, and the requirement of the charging management chip is met; the adjusting resistor is arranged between the charging management chip and the energy storage body, and the output charging voltage of the charging management chip can meet the requirement of the energy storage body on the charging voltage through the adjusted resistance value.
The present invention in a preferred example may be further configured to: the energy management module comprises a voltage monitoring circuit and a voltage stabilizing circuit, the voltage monitoring circuit comprises a voltage monitoring chip and a voltage drop diode, and the voltage stabilizing circuit comprises a low dropout voltage stabilizing chip.
Through adopting above-mentioned technical scheme, voltage monitoring chip is connected with above-mentioned energy storage body for monitor the electric energy voltage of the energy storage body, low dropout voltage regulator chip is used for carrying out the steady voltage to the voltage of the energy storage body input, provides stable voltage for other equipment.
The present invention in a preferred example may be further configured to: the voltage monitoring chip is connected with the energy storage body through the voltage drop diode, the low-voltage-difference voltage stabilization chip is directly connected with the energy storage body, and the voltage monitoring chip is connected with the low-voltage-difference voltage stabilization chip.
Through adopting above-mentioned technical scheme, the enable pin of voltage monitoring chip and low dropout regulator chip directly links to each other to can carry out the ability and go the enable to low dropout regulator chip through the height of voltage monitoring chip output level, and the output of low dropout regulator chip can link to each other through a voltage drop diode with the input of voltage monitoring chip, form a hysteresis circuit, thereby can avoid system's circuit to take place the oscillation phenomenon and influence output voltage's stability, the interference killing feature of system has been improved.
The second aim of the invention is realized by the following technical scheme:
the weak light type energy management method of the weak light type energy management system comprises the following steps:
collecting solar energy through a solar energy collecting module and converting the solar energy into electric energy;
the boosting and charging management module boosts the electric energy and stores the electric energy into an energy storage body;
and the energy management module monitors and stabilizes the electric energy stored in the energy storage body and then outputs the electric energy.
Through adopting above-mentioned technical scheme, solar energy collection module gathers solar energy and converts the electric energy into to utilize to step up and charge management module and step up the back storage to the energy storage body to the electric energy, then use energy management module to the electric energy of the energy storage body, thereby be convenient for monitor output voltage and steady voltage output, for other equipment stable power supplies, help improve equipment to last under the condition of low light, stably for the sensor energy supply.
The present invention in a preferred example may be further configured to: the energy management module monitoring and stabilizing the electric energy stored in the energy storage body comprises:
monitoring the electric energy voltage of the energy storage body through a voltage monitoring chip of the energy management module;
and outputting and stabilizing the electric energy voltage of the energy storage body through a low-dropout voltage stabilizing chip of the energy management module.
Through adopting above-mentioned technical scheme, solar energy is gathered and is converted into the electric energy to solar energy collection module's single crystal solar panel, and utilize to step up and charge the management module and step up the back storage to the energy storage body to the electric energy, then use energy management module's voltage monitoring chip and low dropout voltage stabilizing chip to the electric energy of energy storage body, form hysteresis circuit, thereby be convenient for monitor and steady voltage output voltage, for other equipment stable power supplies, thereby help improve equipment to last under the condition of low light, stably for the sensor energy supply.
The present invention in a preferred example may be further configured to: and the voltage monitoring chip enables the low-dropout voltage stabilizing chip according to the voltage of the energy storage body.
Through adopting above-mentioned technical scheme, voltage monitoring chip enables low dropout voltage regulator chip according to the voltage of the energy storage body, can stabilize output voltage through voltage monitoring chip control low dropout voltage regulator chip.
The third object of the invention is realized by the following technical scheme:
the utility model provides a passive wireless sensor of low light type, include above-mentioned low light type energy management system and wireless sensor, wireless sensor is used for data acquisition and transmits data through wireless mode, low light type energy management system is used for right wireless sensor provides the electric energy.
By adopting the technical scheme, stable voltage is provided for the wireless sensor through the weak light type energy management system, so that the wireless sensor can continuously and stably acquire and wirelessly transmit data with lower power consumption under the conditions of weak light and even no light.
The present invention in a preferred example may be further configured to: the weak light type energy management system supplies power to the wireless sensor through a low-dropout voltage stabilizing chip.
By adopting the technical scheme, the low-dropout voltage stabilizing chip of the low-light type energy management system provides stable voltage for the wireless sensor, so that the wireless sensor can continuously and stably acquire and wirelessly transmit data with lower power consumption under the conditions of low light or even no light.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the device is helpful to improve the continuous and stable energy supply of the sensor under the condition of weak light.
2. The stability of output voltage is prevented from being influenced by oscillation of a system circuit, and the anti-interference capability of the system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a low-light type energy management system disclosed by the invention.
Fig. 2 is a schematic diagram of a specific circuit structure of the weak light type energy management system.
Fig. 3 is a schematic circuit structure diagram of a low-light passive wireless sensor disclosed by the invention.
In the figure, 1, a solar energy collecting module; 2. a boost and charge management module; 3. an energy storage body; 4. an energy management module; 101. a single crystal solar panel; 201. a boost chip; 202. a charging management chip; 401. a voltage monitoring chip; 403. and the low-dropout voltage stabilization chip. 5. A wireless sensor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In a first aspect, the invention discloses a low-light energy management system, please refer to fig. 1, and fig. 1 is a schematic structural diagram of the low-light energy management system, which includes a solar energy collection module 1, a boosting and charging management module 2, an energy storage body 3, and an energy management module 4, wherein the solar energy collection module 1 is connected to the boosting and charging management module 2, the boosting and charging management module 2 is configured to boost electric energy collected by the solar energy collection module 1 and store the electric energy to the energy storage body 3, and the energy management module 4 is connected to the energy storage body 3 and is configured to monitor and stably manage the electric energy of the energy storage body 3.
Example one
Referring to fig. 2, fig. 2 is a schematic circuit diagram of the low-light type energy management system, in which the solar energy collection module 1 includes a single crystal solar panel 101; the boosting and charging management module 2 comprises a boosting circuit and a charging management circuit, wherein the boosting circuit comprises a boosting chip 201, and the charging management circuit comprises a charging management chip 202.
The implementation principle of the above embodiment is as follows: the solar energy collection module 1 adopts the single crystal solar panel 101, the effective area is about 3 square centimeters, the peak value opening voltage is about 1V, the peak value short circuit current is about 10mA, the occupied area is small, the size of the system can be reduced, and the energy conversion efficiency is high. The single crystal solar panel 101 is connected with the input end of the boosting chip 201 of the boosting circuit through an inductance coil, and 1V voltage output by the single crystal solar panel 101 is boosted; specifically, the boost chip 201 adopts TPS61099, the input voltage is 0.7V-5.5V, the output voltage range is 1.8V-5.5V, and the static working current is as low as 400 nA; the charge management chip 202 adopts a BQ24650 battery management chip, the input voltage of the chip is 5-28V, the output charge voltage varies between 2.1V-26V, and the static power consumption is as low as 15 uA. The output of chip 201 that steps up links to each other with electric management chip 202's input, and electric management chip 202 links to each other with the energy storage body 3, even also can last the energy storage that charges through the chip that steps up and the management chip that charges under the condition of low light like this to the energy storage body, then for equipment lasts the power supply.
Example two
Referring to fig. 2, in the first embodiment, an adjusting resistor is disposed between the boost chip 201 and the charge management chip 202, and an adjusting resistor is disposed between the charge management chip 202 and the energy storage body 3.
The implementation principle of the above embodiment is as follows: adjusting resistors R15 and R17 are arranged between the boost chip 201 and the charging management chip 202, and the output voltage of the boost chip 201 is 5V by adjusting the resistance values of the resistors R15 and R17, so that the requirement of the charging management chip 202 is met. The adjusting resistors R13 and R14 are arranged between the charging management chip 202 and the energy storage body 3, and the output charging voltage of the charging management chip 202 can be changed between 2.1V and 26V by adjusting the resistance values of R13 and R14, so that the requirement of the energy storage body 3 on the charging voltage is met. The energy storage body 3 is realized by a 1.5F/5.5V super capacitor, working energy of subsequent equipment for 36 hours can be provided after one-time energy storage is finished, continuous energy can be provided through the energy storage body 3 under the conditions that the equipment is not illuminated at night, a solar panel cannot provide energy or the working instantaneous current of the equipment is relatively large (such as 100 mA), and the requirement of relatively large instantaneous current is met.
EXAMPLE III
Referring to fig. 2, the energy management module 4 includes a voltage monitoring circuit including a voltage monitoring chip 401 and a voltage drop diode 402, and a voltage regulator circuit including a low dropout regulator chip 403.
The implementation principle of the above embodiment is as follows: the voltage monitoring chip 401 is connected to the energy storage body 3, and is configured to monitor the electric energy voltage of the energy storage body 3, and the low dropout voltage stabilizing chip 403 is configured to output the voltage input by the energy storage body 3 to the device after stabilizing the voltage. Specifically, the voltage monitoring chip 401 adopts an MCP111 chip, and the MCP111 chip is a voltage monitoring chip that outputs a high level when the input voltage is greater than DC2.7V; the low dropout regulator chip 403 adopts a TPS70933 chip, which is a low power consumption low dropout linear regulator LDO with a high level enable function, and the output voltage of the low dropout regulator LDO is stabilized at DC3.3V under the high level enable condition to provide a stable voltage for other devices.
Example four
Referring to fig. 2, in the third embodiment, the voltage monitoring chip 401 is connected to the energy storage body 3 through a droop diode, the low dropout regulator chip 403 is directly connected to the energy storage body 3, and the voltage monitoring chip 401 is connected to the low dropout regulator chip 403.
The implementation principle of the above embodiment is as follows: the voltage monitoring chip 401 is connected with the energy storage body 3 through two voltage dropping diodes D11 and D10 and is in one-way conduction, so that the output voltage of the energy storage body 3 is suitable for the input voltage of the voltage monitoring chip 401 after being subjected to voltage reduction regulation through the voltage dropping diodes D11 and D10. Further, the enable pins of the voltage monitoring chip 401 and the low dropout regulator chip 403 are directly connected, so that the low dropout regulator chip 403 can be enabled and disabled through the level of the output level of the voltage monitoring chip 401, the output voltage of the low dropout regulator chip 403 is DC3.3V or 0V, the output end of the low dropout regulator chip 403 can be connected with the input end of the voltage monitoring chip 401 through a voltage drop diode D9, a hysteresis circuit is formed, the problem that the stability of the output voltage is influenced due to the oscillation phenomenon of a system circuit can be avoided, and the anti-interference capability of the system is improved. Specifically, the voltage drop diodes D11 and D10 are both PN junction 0.7V voltage drop diodes, and D9 is a PN junction 0.3V voltage drop diode.
In a second aspect, the present invention discloses a low-light energy management method for the low-light energy management system, including the following steps:
solar energy is collected and converted into electric energy through the solar energy collecting module 1;
the boosting and charging management module 2 boosts the electric energy and stores the electric energy into the energy storage body 3;
the energy management module 4 monitors and stabilizes the electric energy stored in the energy storage body 3, and then outputs the electric energy.
EXAMPLE five
The energy management module 4 monitors and stabilizes the electric energy stored in the energy storage body 3, and includes:
monitoring the electric energy voltage of the energy storage body 3 through a voltage monitoring chip 401 of the energy management module 4;
the electric energy voltage of the energy storage body 3 is output and stabilized through the low-dropout voltage stabilizing chip 403 of the energy management module 4.
Further, the voltage monitoring chip 401 enables the low dropout regulator chip 403 according to the voltage of the energy storage body 3.
The implementation principle of the above embodiment is as follows: the solar energy is collected and converted into electric energy through the single crystal solar panel 101 of the solar energy collection module 1, the electric energy is boosted by the boosting and charging management module 2 and then stored in the energy storage body 3, and then the electric energy of the energy storage body 3 is monitored and voltage-regulated and output by using the voltage monitoring chip 401 and the low-voltage-difference voltage-stabilizing chip 403 of the energy management module 4 so as to supply power to other equipment; further, as described in the fourth embodiment, on one hand, the input voltage of the voltage monitoring chip 401 is the voltage obtained by performing voltage step-down regulation on the output of the energy storage body 3 through the two voltage drop diodes D11 and D10, and on the other hand, the input voltage is the voltage obtained by performing voltage step-down regulation on the output of the low dropout regulator chip 403 through the voltage drop diode D9, and the high-low level output by the voltage monitoring chip 401 controls the operation of the low dropout regulator chip 403, so as to form a hysteresis circuit, which specifically includes the following steps:
s1, the energy storage body 3 powers on the voltage monitoring chip 401 for the first time, the output voltage of the other low dropout regulator chip 403 providing voltage for the voltage monitoring chip 401 is 0, and the output voltage of the energy storage body 3 is
After the voltage reduction adjustment of D11 and D10, the input voltage of the voltage monitoring chip 401 is made to be
-1.4V ；
S2, when the voltage of the energy storage body 3 rises to 4.1V, namely
-1When the voltage of 4V is more than or equal to 2.7V, the voltage monitoring chip 401 (MCP 111) outputs high level, the low dropout voltage stabilizing chip 403 (TPS 70933) is enabled, the output voltage of the low dropout voltage stabilizing chip 403 (TPS 70933) is DC3.3V, and energy is provided for the following equipment;
s3, when the low dropout regulator chip 403 outputs DC3.3V voltage at high level, the two voltage channels supplying power to the voltage monitoring chip 401 (MCP 111) respectively have the following voltages: channel voltage of energy storage body is
1.4V, possibly higher than 2.7V, and possibly lower than 2.7V, but the channel voltage of the low dropout regulator chip 403 is 3.3V-0.3V =3V, which is greater than the 2.7V voltage of the high level output by the voltage monitoring chip 401, so that the voltage monitoring chip 401 (MCP 111) will continuously output the high level;
s4, when the input voltage of the low dropout regulator chip 403 is lower than 3.4V, the output voltage of the low dropout regulator chip 403 decreases to 0V, and then the process returns to step S1.
From the above process, it can be seen that the low dropout regulator chip 403 of the present embodiment has a turn-on voltage of 4.1V and a turn-off voltage of 3.4V, and forms a hysteresis circuit with the voltage monitoring chip 401, so as to avoid the occurrence of oscillation and improve the stability of the output voltage of the system.
In a third aspect, the invention discloses a low-light type passive wireless sensor, as shown in fig. 3, the low-light type passive wireless sensor includes the low-light type energy management system and a wireless sensor 5, the wireless sensor 5 is used for collecting data and transmitting the data in a wireless manner, and the low-light type energy management system is used for providing electric energy for the wireless sensor 5.
EXAMPLE six
The low-light type energy management system supplies power to the wireless sensor 5 through the low-dropout voltage stabilization chip 403.
The implementation principle of the above embodiment is as follows: the wireless sensor 5 adopts a CC2530 chip and can be used for collecting temperature and humidity data of equipment and the like; the voltage input end of the CC2530 chip of the wireless sensor 5 is connected to the output end of the low dropout regulator chip 403 of the low-light type energy management system, and when the voltage of the electric energy stored in the energy storage body 3 rises to a certain value, the low dropout regulator chip 403 starts to stably output DC3.3V voltage to the wireless sensor 5 for use. The CC2530 chip of wireless sensor 5 is in the dormant state most of the time, realizes the low-power consumption, and the chip regularly awakens up and gathers the humiture of equipment, if gather the humiture and be greater than the threshold value of setting for, then go out humiture data through wireless mode transmission and dormancy, then continue dormancy if the temperature is normal, and concrete process is as follows:
1. the wireless sensor CC2530 chip is subjected to power-on self-test;
2. acquiring the temperature of equipment, if the acquired temperature is greater than a preset temperature threshold value, transmitting the temperature data in a wireless mode and sleeping, and if the temperature is normal, sleeping for a certain time (for example, T1= 10S);
3. the method comprises the steps that dormancy is finished, the temperature of equipment is collected, if the collected temperature is larger than a preset temperature threshold value, temperature data are transmitted in a wireless mode and are dormant, if the temperature data are normal, whether a timed data transmission period is met (such as T2= 120S) is checked, if yes, the temperature data are transmitted in the wireless mode and are dormant in a timed mode (T1 = 10S), and if not, the temperature data are dormant in a timed mode (T1 = 10S);
4. and (5) repeating the step (3).
The low-light energy management system provides stable voltage for the wireless sensor CC2530, so that the wireless sensor can continuously and stably acquire and wirelessly transmit data with low power consumption under the conditions of low light or even no light.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A low-light energy management system, characterized by: the solar energy collection module is connected with the boosting and charging management module, the boosting and charging management module is used for boosting electric energy collected by the solar energy collection module and storing the electric energy to the energy storage body, and the energy management module is connected with the energy storage body and is used for monitoring and stably managing the electric energy of the energy storage body.
2. The low-light energy management system of claim 1, wherein: the solar energy collection module comprises a single crystal solar panel; the boost and charge management module comprises a boost circuit and a charge management circuit, the boost circuit comprises a boost chip, and the charge management circuit comprises a charge management chip.
3. The low-light energy management system of claim 2, wherein: the boost management chip is connected with the energy storage body through the boost chip, and the boost management chip is connected with the energy storage body through the boost chip.
4. The low-light energy management system of claim 1, wherein: the energy management module comprises a voltage monitoring circuit and a voltage stabilizing circuit, the voltage monitoring circuit comprises a voltage monitoring chip and a voltage drop diode, and the voltage stabilizing circuit comprises a low dropout voltage stabilizing chip.
5. The low-light energy management system of claim 4, wherein: the voltage monitoring chip is connected with the energy storage body through the voltage drop diode, the low-voltage-difference voltage stabilization chip is directly connected with the energy storage body, and the voltage monitoring chip is connected with the low-voltage-difference voltage stabilization chip.
6. The low-beam energy management method of the low-beam energy management system of claim 1, comprising the steps of:
collecting solar energy through a solar energy collecting module and converting the solar energy into electric energy;
the boosting and charging management module boosts the electric energy and stores the electric energy into an energy storage body;
and the energy management module monitors and stabilizes the electric energy stored in the energy storage body and then outputs the electric energy.
7. The low-light energy management method of claim 6, wherein the energy management module monitoring and stabilizing the electrical energy stored to the energy storage body comprises:
monitoring the electric energy voltage of the energy storage body through a voltage monitoring chip of the energy management module;
and outputting and stabilizing the electric energy voltage of the energy storage body through a low-dropout voltage stabilizing chip of the energy management module.
8. The low-dropout energy management method of claim 7, wherein the voltage monitoring chip enables the low-dropout regulator chip according to a voltage of the energy storage.
9. A passive wireless sensor of low light type which characterized in that: the low-light energy management system of claim 1 and a wireless sensor for collecting and wirelessly transmitting data, the low-light energy management system for providing power to the wireless sensor.
10. The low-light passive wireless sensor of claim 9, wherein: the weak light type energy management system supplies power to the wireless sensor through a low-dropout voltage stabilizing chip.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102255565A (en) * | 2011-05-26 | 2011-11-23 | 重庆大学 | Indoor dim light micro-energy acquisition system and powering method for self-powered wireless sensor |
| CN202488179U (en) * | 2012-02-22 | 2012-10-10 | 深圳市远望谷信息技术股份有限公司 | Solar charging management circuit |
| CN103596293A (en) * | 2013-10-28 | 2014-02-19 | 天津大学 | Wireless sensor node stable power supply system based on minitype thermoelectric generator |
| CN206135553U (en) * | 2016-10-31 | 2017-04-26 | 国网江苏省电力公司电力科学研究院 | A from draw -out power supply device for power equipment condition detects sensor |
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2019
- 2019-12-25 CN CN201911358554.8A patent/CN110957790A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255565A (en) * | 2011-05-26 | 2011-11-23 | 重庆大学 | Indoor dim light micro-energy acquisition system and powering method for self-powered wireless sensor |
| CN202488179U (en) * | 2012-02-22 | 2012-10-10 | 深圳市远望谷信息技术股份有限公司 | Solar charging management circuit |
| CN103596293A (en) * | 2013-10-28 | 2014-02-19 | 天津大学 | Wireless sensor node stable power supply system based on minitype thermoelectric generator |
| CN206135553U (en) * | 2016-10-31 | 2017-04-26 | 国网江苏省电力公司电力科学研究院 | A from draw -out power supply device for power equipment condition detects sensor |
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