CN117955201A - Wireless load power supply system based on micropower power supply - Google Patents
Wireless load power supply system based on micropower power supply Download PDFInfo
- Publication number
- CN117955201A CN117955201A CN202311670960.4A CN202311670960A CN117955201A CN 117955201 A CN117955201 A CN 117955201A CN 202311670960 A CN202311670960 A CN 202311670960A CN 117955201 A CN117955201 A CN 117955201A
- Authority
- CN
- China
- Prior art keywords
- power supply
- power
- wireless load
- electric quantity
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 46
- 230000005059 dormancy Effects 0.000 claims abstract description 9
- 230000004622 sleep time Effects 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 claims description 9
- 238000003306 harvesting Methods 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 12
- 229910052744 lithium Inorganic materials 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000007958 sleep Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 206010027336 Menstruation delayed Diseases 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008844 regulatory mechanism Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a wireless load power supply system based on micropower power supply, which comprises at least one micropower power supply control module and a power supply monitoring module; the micro-power supply control module is used for receiving low-power energy voltage, storing output voltage when a set voltage threshold is met, and supplying power to the wireless load; the power supply monitoring module is used for monitoring the stored electric quantity and the working state of the micropower power supply control module, and dynamically adjusting the dormancy time of the wireless load according to the monitoring parameters. The invention can collect various low-power energy simultaneously to realize continuous and stable power supply, isolate unstable energy sources and dynamically adjust the operation parameters of the wireless load.
Description
Technical Field
The invention relates to the technical field of wireless sensor power supply, in particular to a wireless load power supply system based on micropower power supply.
Background
Wireless sensors are widely used in the field of infrastructure monitoring. However, in practical application, in order to solve the problems of difficult maintenance of battery power supply, high cost and difficult large-scale laying of power supply lines in the traditional direct current power supply mode, the wireless sensor network is mainly kept running in an environment power supply mode; however, the current environment power-taking mode has the following defects:
1) The power taking modes are various, but all have limitations; if solar energy or wind energy is adopted for power supply, electricity cannot be obtained in the building or at dead corners;
2) The wireless sensor has long service life, and the whole acquisition span is required to be in a working state all the time; however, most of the current power supply modes are used for supplying power by means of lithium batteries, for example, most common solar energy is used for supplying power, solar energy is usually collected in the daytime to charge the lithium batteries, and the electric quantity of the lithium batteries is used for working at night; however, the lithium battery has a short service life, and the problems of capacity fading, swelling, damage caused by overlarge cycle times and the like usually occur in about three years; in addition, in the environment with larger temperature difference change, the service life of the lithium battery can be obviously reduced;
3) The environment may change with time, season, or human activity, and continuous and stable power supply cannot be maintained.
Accordingly, in view of the above problems, the present invention provides a wireless load power supply system based on micropower power supply.
Disclosure of Invention
In view of the above, the present invention provides a wireless load power supply system based on micropower power supply, which aims to design a plug and play power supply module capable of being simultaneously applicable to multiple power supplies, and is used for amplifying weak environment acquisition voltage and supplying the amplified weak environment acquisition voltage to load equipment.
Meanwhile, a plurality of power supplies can work simultaneously and are redundant, so that continuous and stable operation of the system is guaranteed. When the energy of a certain power supply is too low or unstable, the system can also cut off the input of the path in time, so that the waste of the electric quantity in the storage battery caused by reverse current is avoided.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a wireless load power supply system based on micropower power supply comprises at least one micropower power supply control module and a power supply monitoring module; wherein,
The micro-power supply control module is used for receiving low-power energy voltage, storing output voltage when a set voltage threshold is met, and supplying power to the wireless load;
The power supply monitoring module is used for monitoring the stored electric quantity and the working state of the micropower power supply control module, and dynamically adjusting the dormancy time of the wireless load according to the monitoring parameters.
Further, the output ends of the micropower power supply control modules are converged to a power supply bus, and the wireless load is powered through the power supply bus.
Further, the micro-power supply control module takes the reference voltage of the comparator as a voltage threshold, takes the output voltage of the low-power energy acquisition equipment as the voltage to be compared, and controls on-off according to the output of the comparator.
Further, the positive input end of the comparator is connected with the output end of the low-power energy acquisition device; the reverse input end is connected with the power supply bus through an inductor and grounded through a first capacitor; the output end is connected to the power supply bus through the inverter and the first PMOS tube in sequence.
Preferably, the power bus is grounded via a diode connected in reverse;
Preferably, before the output end of the low-power energy collecting device is connected with the comparator, the output end of the low-power energy collecting device is grounded through the TVS bidirectional steady-state diode and the second capacitor which are connected in parallel.
Further, the first PMOS tube is connected to the power supply bus through a first resistor, and the power supply monitoring module determines the working state of the micropower power supply control module through the first resistor;
Further, the power supply monitoring module comprises a multipath simulation acquisition chip and a control chip, the multipath simulation acquisition chip is used for monitoring power supply, the sleep time of the wireless load is dynamically adjusted according to monitoring parameters, and an adjustment result is sent to the wireless load through the control chip.
Further, the dynamically adjusting process comprises:
classifying the stored electric quantity, including full electric quantity, high electric quantity, medium electric quantity and low electric quantity;
When the stored electric quantity is full electric quantity and at least one micropower power supply control module outputs normally, generating an adjusting instruction with a preset shortest sleep time length;
when the stored electric quantity is high, the sleep time is adjusted according to the following formula;
Tn+1＝Tn+k1(3.55-U Power supply )
wherein, T n+1 is the next sleep time, T n is the current sleep time, k 1 is a coefficient, and U Power supply is the output voltage of the stored electric quantity;
When the stored electric quantity is the medium electric quantity, the sleep time is adjusted according to the following formula;
Tn+1＝Tn+k2*(1/M)*(3.55-U Power supply )
Wherein k 2 is a coefficient, k 2>k1,M＝∑(pi*ni/N)/P Total (S) , p i is average power output by the ith path, N i is power supply interruption times in N times of scanning, and N is scanning times in each period;
And when the stored electric quantity is low, generating an adjusting instruction according to the preset longest dormancy time.
Further, the wireless load power supply system further comprises a power supply mode switching module, wherein the power supply mode switching module is used for switching the power supply mode of the wireless load, and the power supply mode comprises direct current source power supply and low-power energy power supply; wherein,
The input end of the power supply mode switching module is used for receiving direct current, the output end of the power supply mode switching module is connected to the power supply bus through a second PMOS tube and used for controlling the on-off of the power supply bus, and the output end of the power supply mode switching module is connected to the wireless load through a third PMOS tube and used for controlling the on-off of a direct current power supply circuit.
Preferably, the output of the power mode switching module is also grounded through NOMS.
Preferably, the grid electrode of the second PMOS transistor is grounded through a second resistor, the grid electrode of the third PMOS transistor is connected with the source electrode through a third resistor and supplies power to the wireless load through the source electrode, and the grid electrode of the third PMOS transistor is connected with the source electrode of the NMOS.
Further, the device also comprises an energy storage module for storing the micropower power supply control module and/or the direct current source power supply voltage, and the energy storage module is connected with the power supply monitoring module and used for monitoring the electric quantity of the energy storage module through the power supply monitoring module.
Compared with the prior art, the wireless load power supply system based on micro-power supply can collect various low-power energies at the same time, and the limitations of the low-power energies can be complemented by complementation, so that continuous and stable power supply is realized. In addition, the design realizes continuous power supply by matching with the super capacitor, so that the circuit part is easier to be sealed and packaged under the condition of no battery module, and the whole service life is prolonged.
Further, the invention can automatically isolate the energy which can not be obtained or is unstable, thereby avoiding loss; meanwhile, when a direct current source exists, the energy collection circuit of the low-power meter can be automatically closed, and only the direct current source is used for supplying power; in addition, the load equipment can be automatically and dynamically adjusted according to the output parameters of the low-power supply control module under the condition of energy permission, so that the optimal operation is realized, and shutdown caused by overlarge operation energy consumption is avoided.
The system of the invention adopts discrete components and small-scale low-power chip design, does not adopt equipment such as a processor and the like, and has the characteristics of high efficiency and extremely low energy consumption; in actual use, the collection of various low-power energies can be realized only by inserting a plurality of micropower power supply control modules, and the invention does not need to distinguish on hardware, thereby reducing the production and deployment costs;
In addition, the modularized design is adopted, so that the packaging is facilitated, the reliability of an electronic circuit is greatly improved, the service life is prolonged, the circuit inspection function is designed, only a fault module is replaced during replacement, and the maintenance cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a wireless load power supply system based on micropower power supply;
fig. 2 is a schematic structural diagram of a micropower supply control module according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention discloses a wireless load power supply system based on micropower power supply, which firstly provides a plug and play power supply control module suitable for various low-power supplies, and can realize coordinated power supply of various energies so as to continuously provide stable power supply for loads; secondly, in the power supply process, the output parameters of the low-power supply control module are monitored, so that the dynamic adjustment of the acquisition frequency can be realized by the auxiliary load, and the optimal operation can be realized; in the present embodiment, the power supply mode switching module is configured to switch between dc power supply and low-power energy power supply as required, and preferably, when dc power supply exists, the power supply mode switching module is configured to cut off collection of low-power energy and supply power to the load only through dc power.
The scheme of the invention is realized by the following structure:
In this embodiment, the wireless load power supply system includes at least one micropower power supply control module and a power supply monitoring module; wherein,
The micro-power supply control module is used for receiving low-power energy voltage, storing output voltage when a set voltage threshold is met, and supplying power to the wireless load;
The power supply monitoring module is used for monitoring the stored electric quantity and the working state of the micropower power supply control module, and dynamically adjusting the dormancy time of the wireless load according to the monitoring parameters.
Specifically, as shown in fig. 1, the micropower power supply control modules are multiple and are respectively used for receiving low-power energy voltages, and the low-power energy voltages are acquired through acquisition equipment and then obtained through voltage conversion; wherein the low power energy comprises a photovoltaic panel and a voltage conversion module thereof; semiconductor thermoelectric generation piece and voltage conversion module thereof; micro-photoelectric sensor and voltage conversion module thereof; an anemometer power generation mechanical device and a voltage conversion module thereof; the cable current electromagnetic induction power generation and voltage conversion module; and a Radio Frequency (RF) energy harvesting power generation device, a voltage conversion module thereof, and the like.
Further, the output ends of the micropower power supply control modules are converged to a power supply bus, and the wireless load is powered through the power supply bus.
The control principle of the micropower power supply control module in the invention is as follows: and taking the reference voltage of the comparator as a voltage threshold value, taking the output voltage of the low-power energy acquisition equipment as the voltage to be compared, and controlling on-off according to the output of the comparator.
In one embodiment, the circuit is implemented by a comparator and an inverter, and at this time, the circuit structure of the micro-power supply control module is shown in fig. 2,
The positive input end of the comparator is connected with the output end of the low-power energy acquisition device;
The reverse input end is connected with the power supply bus through an inductor L and grounded through a first capacitor C1, and is used for generating a voltage slightly smaller than the output voltage of the low-power energy acquisition equipment to serve as a comparison voltage threshold; namely, the voltage at the common node between the first capacitor C1 and the inductor L is used as the feedback reference voltage; the capacities of the first capacitor C1 and the inductor L can be set according to the required reference voltage;
The output end is connected to the power supply bus through the inverter and the first PMOS tube PMOS1 in sequence; specifically, a drain electrode of the first PMOS transistor PMOS1 is connected to an output end of the low-power energy collecting device, a source electrode is used as an output end, a gate electrode is connected to an output end of the inverter, and a parasitic diode is connected between the drain electrode and the source electrode.
The specific control process is as follows:
The output voltage of the low-power energy acquisition equipment is input to the positive input end of the comparator, when the acquired voltage is greater than the reference voltage, a high level is output, and the low level is obtained after the high level is inverted through the inverter; meanwhile, the collected low-power energy input voltage is input to the drain electrode of the first PMOS tube PMOS1, and is subjected to voltage drop of 0.7 from the diode to the source electrode, so that the low-power energy input voltage is slightly smaller than the low-power energy input voltage, and the comparator outputs a low level at the moment, so that the first PMOS tube PMOS1 is conducted, and the collected low-power energy voltage is further output to the power supply bus;
similarly, when the output voltage of the low-power energy collection device is smaller than the reference voltage, a high level is output, so that the first PMOS tube PMOS1 is cut off, and the output channel is cut off.
In order to further optimize the technical scheme, the power supply bus is grounded through a reversely connected diode so as to prevent voltage backflow in the power supply bus.
Secondly, before the output end of the low-power energy acquisition equipment is connected with a comparator, the low-power energy acquisition equipment is grounded through a TVS bidirectional steady-state diode and a second capacitor C2 which are connected in parallel; the method and the device avoid equipment breakdown caused by the fact that a user plugs and unplugs the low-power supply control module, and meanwhile input curves are smoothed.
In addition, the first PMOS tube PMOS1 is connected to a power supply bus through a first resistor R1, and is used for enabling the power supply monitoring module to determine the working state of the micropower power supply control module through the first resistor R1; the power supply monitoring module obtains the output voltage of the micropower power supply control module through the output end of the first PMOS tube PMOS1, obtains the low-power bus voltage through monitoring the power supply bus, further determines the output power of the micropower power supply control module, and judges whether the equipment is in a normal working state through the output power.
The input power is calculated by (U Single-way -U Bus line )2/R, in this embodiment, the average power per hour is higher than 200mW in normal operation and is marked as a conventional power supply module, and lower than 200mW is marked as a micro-power supply module;
in the invention, when the sleep time is dynamically adjusted, the average power of each input is further determined, in one embodiment, the average power is obtained by dividing the six power additions scanned in the hour by 6, wherein the scanning period is taken as an hour, and the scanning period is scanned every 10 minutes.
It should be noted that this determination may be varied, for example, the solar energy may become micropower during some of the early and late periods.
In the application, the power supply monitoring module comprises a multipath simulation acquisition chip and a control chip, specifically, the multipath simulation acquisition chip is used for scanning and monitoring power supply, preferably, the multipath simulation acquisition chip adopts a low-power consumption design, scans once every 10 minutes, and enters a sleep mode after each scanning; dynamically adjusting the sleep time of the wireless load according to the monitoring parameters, communicating the adjustment result with load equipment through serial interfaces (RXD and TXD wiring) in the control chip, and sending the monitoring result to the wireless load;
wherein the process of dynamic adjustment comprises:
Classifying the stored electric quantity, including full electric quantity, high electric quantity, medium electric quantity and low electric quantity; in this embodiment, the full charge voltage is 3.6V or more, the high charge is 3.5-3.6V, the medium charge is 3.2-3.5V, the low charge is 3.0-3.2V, and the depletion state is 3.0V or less.
When the stored electric quantity is full and at least one micropower power supply control module outputs normally, the system does not limit the power operation and generates an adjusting instruction with a preset shortest dormancy time; namely, the load circuit can work in a preset conventional mode, and even continuously works;
when the stored electric quantity is high, the sleep time is adjusted according to the following formula;
Tn+1＝Tn+k1(3.55-U Power supply )
Wherein, T n+1 is the next sleep time, T n is the current sleep time, k 1 is a coefficient, and U Power supply is the output voltage of the stored electric quantity;
The goal of this control is to allow the stored power to automatically adjust the sleep time when it deviates from 3.55V. So that the dynamic balance is realized in the range of 3.5-3.6V.
When the stored electric quantity is the medium electric quantity, the sleep time is adjusted according to the following formula;
Tn+1＝Tn+k2*(1/M)*(3.55-U Power supply )
Wherein k 2 is a coefficient, k 2>k1,M＝∑(pi*ni/N)/P Total (S) , p i is average power output by the ith path, N i is power supply interruption times in N times of scanning, and N is scanning times in each period;
the sleep time is increased in a weighted manner in the interval to ensure that more power is used to charge the battery to resume the balanced interval operation.
When the stored power is low, generating an adjustment instruction with a preset longest sleep time, for example, the sleep time is 1 hour. The system is now operating with minimal power consumption to supplement the power supply.
In addition, if multiple processing cycles are all operating in the mid-power interval, the system will turn up the values of k 1 and k 2; if multiple processing cycles are operating in the high power interval, the system will lower the values of k 1 and k 2 to ensure control accuracy.
In this embodiment, the adjustment period is set to 3 hours, that is, the time of day is set to 8 periods, each of which corrects k1 and k2 according to the environmental factor at that time.
According to the regulation mechanism, the load equipment can automatically regulate the sleep time according to the environmental condition, so that the battery voltage is dynamically returned to 3.55V, and meanwhile, the environmental energy input is adapted with the highest working efficiency.
It should be noted that if the sleep strategy cannot be adjusted in time or the battery is exhausted due to an adjustment error, the whole system stops working, and the collected energy only supplies the lithium battery for charging. When the battery is charged to a certain degree, the monitoring chip is started first, and the strategy is continuously perfected according to the data before power failure.
Specifically, each time the load system ends dormancy, when entering a working period, the driver writes a working start mark in Flash, and when the working period is about to end, a working end mark is written in Flash. If the next working period finds that the last working starting mark is only available and the working ending mark is not available, and the battery is in a low-power interval at the moment, the phenomenon that the battery is exhausted and the working is interrupted is indicated to be very likely to occur. At this time, the driver will write into the problem log for the user to check the problem, and optimize the design (the longest sleep time is already the time, and cannot be increased further).
In one embodiment, the power supply system of the present invention further includes a power supply mode switching module, configured to switch a power supply mode of the wireless load according to a need, where the power supply mode includes a dc source power supply and a low power energy power supply;
In this embodiment, the specific structure includes: the input end receives direct current, the output end is connected to the power supply bus through a second PMOS tube PMOS2 and used for controlling the on-off of the power supply bus, and is connected to the wireless load through a third PMOS tube PMOS3 and used for controlling the on-off of a direct current power supply circuit; in this embodiment, the output end of the third PMOS transistor PMOS3 is lapped to the output end of the second PMOS transistor PMOS2, and the common power supply bus is used as the dc power supply line;
and grounding through the NOMS.
Preferably, the second PMOS transistor PMOS2, the third PMOS transistor PMOS3 and the NMOS transistor all adopt a connection mode of anti-reverse connection, that is, the gate of the second PMOS transistor PMOS2 is grounded through the second resistor R2, the gate of the third PMOS transistor PMOS3 is connected with the source through the third resistor R3 and supplies power to the wireless load through the source, and the gate of the third PMOS transistor PMOS3 is connected with the source of the NMOS transistor.
The switching principle is as follows:
When no direct current source is input, the grid electrode in the second PMOS tube PMOS2 is pulled down by the second resistor R2, so that the second PMOS tube PMOS2 is in a conducting state, and the grid electrode of the third PMOS tube PMOS3 is pulled up by the third resistor R3, so that the third PMOS tube PMOS3 is in a cut-off state, and the wireless load is powered by using low-power energy voltage at the moment;
When a direct current source is input, the second resistor R2 pulls up the voltage at the g end of the second PMOS tube PMOS2 to a high potential, so that the voltage at the g end is larger than the voltage at the s end, and the second PMOS tube PMOS2 is disconnected; meanwhile, the NMOS tube is conducted, and then the grid electrode of the third PMOS tube PMOS3 is pulled down, so that the third PMOS tube PMOS3 is conducted, and the power supply of a load by using a direct current source is realized.
Further, the wireless load power supply system is provided with the energy storage module, and is used for storing the micropower power supply control module and/or the direct current source power supply voltage and smoothly outputting, so that temporary interruption of energy collection is avoided; meanwhile, the module is connected with the power supply monitoring module and is used for monitoring the electric quantity of the energy storage module through the power supply monitoring module.
The energy storage module is composed of a lithium battery and a protection circuit or a super capacitor.
In one embodiment, the wireless load power supply system of the application operates as follows:
Preparation: the system is simultaneously connected with two modules for collecting photovoltaic and radio frequency energy sources; the load circuit is a wireless analog quantity acquisition module.
Step1: because the system does not use direct current input, the power supply path is a low-power energy acquisition module.
Step2: the collection device 1 is a photovoltaic panel, and solar energy is converted into 3.5V voltage through the photovoltaic panel and a voltage conversion circuit and acts on a first path of input. The path outputs energy to the low-power bus, and the energy is between 3.3V and 3.5V (a certain voltage drop exists in actual use);
Step3: the acquisition device 2 is a radio frequency input, and is converted into 3.5V voltage through voltage conversion, and acts on the second path of input. The path also outputs energy to the low-power bus, and the energy is between 3.3V and 3.5V;
Note that: in Step2 and Step3, the feedback voltage is 3V. That is, when each input is greater than 3V, the input is output to the bus, otherwise, the input is judged to be unstable input and is cut off;
Step4: the power bus simultaneously supplies the output and charges the lithium battery.
Step5: the monitoring chip considers that the two paths of power supplies are normal in operation through monitoring at the moment, and the lithium battery is full, so that data is sent to the load equipment (wireless sensor network node), a driving program receives the data, namely, the control node works in a higher-performance mode, and the acquisition frequency is changed to 10 seconds Zhong Yici;
Step6: when the solar energy supply is stopped at night, the input voltage is smaller than 3V, so that the solar energy supply is automatically cut off, the system only remains the radio frequency input power supply (the solar energy supply is usually in the order of hundreds of milliwatts to watts, and the radio frequency power supply is only in the order of hundreds of milliwatts to milliwatts), at this time, the node still executes in the original mode, and the lithium battery energy is excessively used, so that the battery power is reduced.
Step7: in the intermittent operation process of the monitoring chip, the solar energy input (1-path input) is found to be interrupted for a long time (the power is 0), the electric quantity of the battery is reduced to some extent, and when the electric quantity of the battery is reduced to high electric quantity or medium electric quantity, the sleep time is adjusted according to the method, and corresponding data are transmitted to the load equipment through the serial port. And when the driver receives the data, the data is acquired according to the adjusted sleep time.
Step8: and after the acquisition frequency is prolonged, according to the change of the residual electric quantity of the battery, if the battery is continuously lowered, the dormancy time is continuously prolonged. If the battery charge rises, the sleep time is suitably shortened until a relative dynamic balance is achieved.
If the sleep strategy cannot be adjusted in time or the battery is exhausted due to adjustment errors, the whole system stops working, and the collected energy only supplies the lithium battery for charging. When the battery is charged to a certain degree, the monitoring chip is started first, and the strategy is continuously perfected according to the data before power failure, so that the battery is operated in a more energy-saving mode. After the load system is powered on, the data is updated, and the adjusted scheme is applied.
Step9: when the solar energy input resumes normal again, the monitoring chip can find out in time through the data, and at the moment, the low-power-consumption running state can be kept, so that the lithium battery is charged. And after the load device is fully charged, sending an instruction to the load device to enable the load device to continuously recover the high-performance operation mode, and recovering the acquisition frequency to be once in 10 seconds.
The wireless load power supply system based on the micropower power supply disclosed by the invention can be suitable for a passive low-power consumption scene, and can realize overall path control among multiple unstable low-power consumption inputs. When in use, the energy collection module can be inserted for use, and the flexibility is higher.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The wireless load power supply system based on the micropower power supply is characterized by comprising at least one micropower power supply control module and a power supply monitoring module; wherein,
The micro-power supply control module is used for receiving low-power energy voltage, storing output voltage when a set voltage threshold is met, and supplying power to the wireless load;
The power supply monitoring module is used for monitoring the stored electric quantity and the working state of the micropower power supply control module, and dynamically adjusting the dormancy time of the wireless load according to the monitoring parameters.
2. The micro-power supply-based wireless load power supply system according to claim 1, wherein the output ends of the micro-power supply control modules are converged to a power supply bus, and the wireless load is supplied with power through the power supply bus.
3. The wireless load power supply system based on micro-power supply according to claim 2, wherein the micro-power supply control module takes a reference voltage of a comparator as a voltage threshold value, takes an output voltage of low-power energy acquisition equipment as a voltage to be compared, and controls on-off according to the output of the comparator.
4. A micro-power supply based wireless load power supply system according to claim 3, wherein the positive input of the comparator is connected to the output of the low power energy harvesting device; the reverse input end is connected with the power supply bus through an inductor and grounded through a first capacitor; the output end is connected to the power supply bus through the inverter and the first PMOS tube in sequence.
5. The wireless load power supply system based on micro-power supply according to claim 4, wherein the first PMOS tube is connected to the power supply bus through a first resistor, and the power supply monitoring module determines the working state of the micro-power supply control module through the first resistor.
6. The wireless load power supply system based on micropower power supply according to claim 5, wherein the power supply monitoring module comprises a multipath analog acquisition chip and a control chip, the power supply is monitored through the multipath analog acquisition chip, the sleep time of the wireless load is dynamically adjusted according to the monitoring parameters, and the adjustment result is sent to the wireless load through the control chip.
7. A micro-power based wireless load power supply system according to claim 1 or 6, wherein the process of dynamic adjustment comprises:
classifying the stored electric quantity, including full electric quantity, high electric quantity, medium electric quantity and low electric quantity;
When the stored electric quantity is full electric quantity and at least one micropower power supply control module outputs normally, generating an adjusting instruction with a preset shortest sleep time length;
when the stored electric quantity is high, the sleep time is adjusted according to the following formula;
Tn+1＝Tn+k1(3.55-U Power supply )
wherein, T n+1 is the next sleep time, T n is the current sleep time, k 1 is a coefficient, and U Power supply is the output voltage of the stored electric quantity;
When the stored electric quantity is the medium electric quantity, the sleep time is adjusted according to the following formula;
Tn+1＝Tn+k2*(1/M)*(3.55-U Power supply )
Wherein k 2 is a coefficient, k 2>k1,M＝∑(pi*ni/N)/P Total (S) , p i is average power output by the ith path, N i is power supply interruption times in N times of scanning, and N is scanning times in each period;
And when the stored electric quantity is low, generating an adjusting instruction according to the preset longest dormancy time.
8. The micro-power supply-based wireless load power supply system according to claim 2, further comprising a power supply mode switching module for switching a power supply mode of the wireless load, wherein the power supply mode includes a direct current source power supply and a low power energy power supply; wherein,
The input end of the power supply mode switching module is used for receiving direct current, the output end of the power supply mode switching module is connected to the power supply bus through a second PMOS tube and used for controlling the on-off of the power supply bus, and the output end of the power supply mode switching module is connected to the wireless load through a third PMOS tube and used for controlling the on-off of a direct current power supply circuit.
9. The wireless load power supply system based on micro-power supply according to claim 8, further comprising an energy storage module for storing micro-power supply control module and/or dc source supply voltage, wherein the energy storage module is connected to the power supply monitoring module for monitoring the electric quantity of the energy storage module through the power supply monitoring module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311670960.4A CN117955201A (en) | 2023-12-07 | 2023-12-07 | Wireless load power supply system based on micropower power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311670960.4A CN117955201A (en) | 2023-12-07 | 2023-12-07 | Wireless load power supply system based on micropower power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117955201A true CN117955201A (en) | 2024-04-30 |
Family
ID=90800763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311670960.4A Pending CN117955201A (en) | 2023-12-07 | 2023-12-07 | Wireless load power supply system based on micropower power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117955201A (en) |
-
2023
- 2023-12-07 CN CN202311670960.4A patent/CN117955201A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11742691B2 (en) | Supplemental power supply for a battery-powered device | |
| US10396590B2 (en) | Variable power energy harvesting system | |
| US20170310141A1 (en) | Energy converting apparatus and method | |
| KR101256077B1 (en) | Power control system and controlling method thereof | |
| CN203589779U (en) | Solar storage battery charging-discharging controller | |
| CN111711259A (en) | Photovoltaic micro-energy collection system and hybrid energy storage automatic charging and discharging control method thereof | |
| CN107895997B (en) | Energy system with multi-energy composite power supply | |
| US20140103723A1 (en) | Maximum power point controller transistor driving circuitry and associated methods | |
| CN106602703A (en) | Solar-energy and commercial-power alternative power supply system and method thereof | |
| CN106300616A (en) | A kind of photovoltaic DC air-conditioner controller | |
| CN117955201A (en) | Wireless load power supply system based on micropower power supply | |
| CN216086237U (en) | Small-power wind-solar hybrid power supply | |
| CN213093900U (en) | Charging Internet of things module for new energy automobile | |
| US10110008B2 (en) | Micro grid stabilization device | |
| CN202616806U (en) | Low voltage power supply system capable of realizing air-conditioning photovoltaic system power supply standby | |
| CN201499006U (en) | Power supply for on-line monitoring system of transmission line | |
| KR100454896B1 (en) | Control system for charging and discharging solar photovoltaic module for solar streetlight and stand-alone system | |
| CN114285132A (en) | Low-power consumption energy acquisition circuit | |
| CN207926250U (en) | A kind of synthesis is for electric installation | |
| KR101162221B1 (en) | An apparatus of preventing over-charging/over-discharging for an energy storage and a method thereof | |
| CN206060338U (en) | A kind of photovoltaic DC air-conditioner controller | |
| CN201236616Y (en) | Control device of rolling door | |
| CN201733125U (en) | Power management system for power comprehensive measurement and control instrument | |
| CN113629839A (en) | Solar power generation system with battery awakening charging function | |
| CN101154825A (en) | Electric power supply system with remote control circuit and its operating method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |