CN114709936B

CN114709936B - Power smart lock wireless charging system

Info

Publication number: CN114709936B
Application number: CN202210350772.2A
Authority: CN
Inventors: 郭家虎; 张超; 王玄
Original assignee: Anhui Huasheng Energy Internet Research Institute Co ltd
Current assignee: Anhui Huasheng Energy Internet Research Institute Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2025-06-17
Anticipated expiration: 2042-04-02
Also published as: CN114709936A

Abstract

The present invention discloses a wireless charging system for an electric smart lock, relates to the technical field of wireless charging, and solves the technical problem that in the process of wireless charging of the smart lock in the prior art, only the switch of the wireless charging is controlled, but the efficiency of the wireless charging cannot be monitored in real time, resulting in poor wireless charging effect. The present invention determines whether the conditions for wireless charging are met, and in the process of wireless charging of the smart lock body, the control module evaluates the charging efficiency according to the output power of the charging transmitting end, according to the output power or by combining the output power with the power of an energy storage unit, and monitors the wireless charging efficiency in real time on the basis of ensuring the wireless charging conditions, thereby improving the wireless charging effect. The present invention can evaluate the charging efficiency according to the output power of the charging transmitting end, and the evaluation process is simple, and can also evaluate the charging efficiency in combination with the power of the energy storage unit and an artificial intelligence model, etc., with high evaluation accuracy, so that the application range of the present invention is wider and can adapt to different needs.

Description

Wireless charging system of electric power intelligent lock

Technical Field

The invention belongs to the field of wireless charging, relates to a wireless charging technology of an electric power intelligent lock, and particularly relates to a wireless charging system of the electric power intelligent lock.

Background

Most intelligent locks adopt active designs, namely, the power supply is configured for each intelligent lock, the power supply needs to be replaced periodically, the operation is complex, the environment is not protected, the electric intelligent lock is small in size and is not suitable for setting the power supply, and therefore, the intelligent lock with wireless charging is required.

The prior art (the invention patent with publication number CN 111371194A) discloses a wireless intelligent lock system that charges, through optimizing intelligent lock body structure, sets up wireless charging device for the intelligent lock body charge convenient and fast more. In the prior art, in the process of wirelessly charging the intelligent lock, only the switch of wireless charging is controlled, but the efficiency of wireless charging cannot be monitored in real time, so that the wireless charging effect is poor, and therefore, a wireless charging system for the electric intelligent lock is needed.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and therefore provides a wireless charging system of an electric intelligent lock, which is used for solving the technical problem that in the prior art, in the process of wirelessly charging an intelligent lock, only a wireless charging switch is controlled, and the wireless charging efficiency cannot be monitored in real time, so that the wireless charging effect is poor.

The wireless charging control system and the wireless charging control method have the advantages that whether the wireless charging condition is met is judged, and in the process of wirelessly charging the intelligent lock body, the control module evaluates the charging efficiency according to the output power of the charging transmitting end or the combination of the output power and the electric quantity of the energy storage unit, and monitors the wireless charging efficiency in real time on the basis of guaranteeing the wireless charging condition, so that the wireless charging effect is improved.

In order to achieve the above object, a first aspect of the present invention provides a wireless charging system for an electric smart lock, including an smart lock body, a charging transmitting end matched with an internal charging receiving end of the smart lock body, and a monitoring module for monitoring wireless charging of the smart lock body;

The charging receiving end comprises a second controller, an induction coil II, a rectifying circuit and an energy storage unit, wherein the induction coil I and the induction coil II are matched with each other, and data interaction is carried out between the first controller and the second controller;

in the wireless charging process of the intelligent lock body, the control module acquires the output power of the charging transmitting end in real time through the sensor, analyzes the output power to acquire the charging efficiency, or evaluates the charging efficiency by combining the electric quantity of the energy storage unit.

Preferably, the charging transmitting end is arranged in an intelligent key matched with the intelligent lock body;

The intelligent key is internally provided with a Bluetooth communication unit, and performs data interaction with an intelligent terminal through the Bluetooth communication unit, wherein the intelligent terminal comprises an intelligent mobile phone or a computer.

Preferably, a power supply unit is arranged in the intelligent key and cooperates with the charging transmitting end, wherein the power supply unit charges in a wired mode.

Preferably, before the intelligent lock body is wirelessly charged, a charging signal is generated according to the electric quantity of the energy storage unit;

After receiving the charging signal, the intelligent key detects the power supply unit and starts wireless charging according to the detection result.

Preferably, the control module evaluates charging efficiency according to the output power of the charging transmitting end, and includes:

Acquiring the output power of a charging transmitting end in real time;

when the output power is in a preset range, acquiring the mean square error of the output power in a set period;

And when the mean square error is smaller than a variance threshold, judging that the wireless charging efficiency is normal, wherein the variance threshold is set according to experience.

Preferably, the control module evaluates charging efficiency according to output power of the energy storage unit and the charging transmitting end, and includes:

acquiring a power average value of output power of a charging transmitting end in unit time and an electric quantity increment of an energy storage unit, wherein the unit time comprises one second, one minute and one hour;

acquiring corresponding electric quantity standard increment according to the power average value and a power-electric quantity curve, wherein the power-electric quantity curve is established according to the wireless charging characteristics and experience data;

And when the absolute value of the electric quantity standard increment and the electric quantity increment difference value is smaller than the corresponding difference value threshold, judging that the charging efficiency is normal, wherein the difference value threshold is set according to actual experience.

Preferably, the power average value and the efficiency evaluation model are combined to evaluate the charging efficiency, including:

Acquiring a power average value and environment data of the intelligent lock body, wherein the environment data comprises temperature and humidity;

integrating and inputting the power mean value and the environmental data into an efficiency evaluation model to obtain corresponding electric quantity standard increment, wherein the efficiency evaluation model is built based on an artificial intelligent model;

and comparing the standard increment of the electric quantity with the increment of the electric quantity, and judging whether the charging efficiency is abnormal or not.

Preferably, the establishing an efficiency evaluation model based on the artificial intelligence model includes:

the method comprises the steps of obtaining standard training data, wherein the standard training data are obtained in a laboratory and comprise temperature, humidity, power average value in unit time and corresponding standard increment of electric quantity;

Training the constructed artificial intelligent model through standard training data, marking the artificial intelligent model after training as a state evaluation model, and storing the state evaluation model in a control system.

Compared with the prior art, the invention has the beneficial effects that:

1. The wireless charging control system and the wireless charging control method have the advantages that whether the wireless charging condition is met is judged, and in the process of wirelessly charging the intelligent lock body, the control module evaluates the charging efficiency according to the output power of the charging transmitting end or the combination of the output power and the electric quantity of the energy storage unit, and monitors the wireless charging efficiency in real time on the basis of guaranteeing the wireless charging condition, so that the wireless charging effect is improved.

2. The invention can evaluate the charging efficiency according to the output power of the charging transmitting end, has simple evaluation process, can also be combined with the electric quantity of the energy storage unit, the artificial intelligent model and the like to evaluate the charging efficiency, has high evaluation precision, ensures that the invention has wider application range and can adapt to different requirements.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the structure of a charging transmitting terminal and a charging receiving terminal according to the present invention.

FIG. 2 is a schematic diagram of the working steps of the present invention.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, 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 prior art (the invention patent with publication number CN 111371194A) discloses a wireless intelligent lock system that charges, through optimizing intelligent lock body structure, sets up wireless charging device for the intelligent lock body charge convenient and fast more. In the prior art, in the process of wirelessly charging the intelligent lock, only the switch of wireless charging is controlled to determine whether to wirelessly charge, but the efficiency of wireless charging cannot be monitored in real time, so that the wireless charging effect is poor.

Referring to fig. 1-2, an embodiment of a first aspect of the present application provides a wireless charging system for an electric power intelligent lock, including an intelligent lock body, a charging transmitting end matched with a charging receiving end in the intelligent lock body, and a monitoring module for monitoring wireless charging of the intelligent lock body;

In the application, the charging transmitting end and the charging receiving end are combined to complete wireless charging, and the induction coil I and the induction coil II are mutually matched to generate induction current so as to complete wireless charging. It can be understood that the first controller and the second controller can perform data interaction to complete the transmission of related data.

The sensor in the application mainly comprises a current sensor and a voltage sensor, and in other preferred embodiments, the sensor can also comprise a temperature sensor, a humidity sensor and other sensors which are needed in the wireless charging process.

The wireless charging in the application takes a magnetic field as a charging medium and takes an electromagnetic induction principle as a basic principle, after the charging transmitting end obtains electric energy (a power supply unit), the electric energy is converted into the required direct current through voltage, then the direct current directly enters a corresponding inverter to complete high-frequency inversion conversion, and the converted high-frequency alternating current directly flows into an air gap of a primary winding through the action of a compensation loop under the action of a feedback control signal, thereby generating high-frequency alternating magnetic flux, and further completing the wireless charging.

The wireless charging of the application inverts input current by utilizing an LC series resonant circuit of BQ500212A, a voltage current detection circuit of INA199A1DCKR, an RC delay circuit and the like, generates a high-frequency alternating current magnetic field with a primary side of at least 100kHz at a charging transmitting end, and transmits power from a charging transmitting end to a charging receiving end at a BQ51013BRHLR receiver because coils of the primary side and a secondary side are mutually coupled in the magnetic field, thereby generating corresponding induction current at the secondary side coil, converting magnetic field energy into electric field energy, rectifying the electric field energy, transmitting direct current voltage with the voltage of 5V by a receiving chip, and controlling the transmitted power by the receiving end through transmitting a feedback signal to the charging transmitting end.

The intelligent key is provided with the power supply unit which is cooperated with the charging transmitting end, wherein the power supply unit charges in a wired mode.

Specifically, the power supply unit may be a lithium battery, and the lithium battery provides electric energy for the wireless charging system, so as to ensure that the charging transmitting end and the charging receiving end can complete wireless charging, and the lithium battery is charged in a limited manner.

In the application, before the intelligent lock body is wirelessly charged, a charging signal is generated according to the electric quantity of the energy storage unit;

Before wireless charging, the electric quantity in the energy storage unit needs to be detected, and when the electric quantity of the energy storage unit cannot meet the working of the intelligent lock body or is lower than a set electric quantity threshold value, a charging signal can be generated.

When the smart key receives the charging signal, a detection is also required to be performed on the power supply unit to ensure that the electric energy of the power supply unit can complete wireless charging. It should be noted that the detection of the power supply unit should be performed periodically, so as to avoid insufficient power of the power supply unit when wireless charging is required.

In a preferred embodiment, the control module evaluates the charging efficiency according to the output power of the charging transmitting terminal, including:

Acquiring the output power of a charging transmitting end in real time;

and when the mean square error is smaller than the variance threshold, judging that the wireless charging efficiency is normal.

In this embodiment, whether the real-time output power is normal is determined according to the comparison between the output power of the charging transmitting end and the preset range, and when the real-time output power is normal, the mean square error of the output power in the set period is obtained for further verification.

This example is illustrated:

assuming that the preset range is [4.5,5.5], the unit W, and the set period is one minute;

when the output power acquired in real time is not in the preset range, the output power is judged to be abnormal, when the output power is in the preset range, the mean square error of the output power in one minute is acquired, and the mean square error is compared with the variance threshold value to evaluate the abnormality of the charging efficiency.

It should be noted that, in the process of wireless charging, the charging efficiency at different stages is different due to the consideration of protecting the energy storage unit, so that the embodiment should select the stage in which the output power of the charging transmitting end suddenly changes in the stable state when determining the charging efficiency, so as to ensure accurate evaluation of the charging efficiency. It will be appreciated that the variance threshold for different phases is different and therefore needs to be set empirically.

In a preferred embodiment, the control module evaluates the charging efficiency according to the output power of the energy storage unit and the charging transmitting terminal, including:

Acquiring a power average value of output power of a charging transmitting end in unit time and increasing the electric quantity of an energy storage unit;

acquiring corresponding electric quantity standard increment according to the power average value and the power-electric quantity curve;

And when the absolute value of the electric quantity standard increment and the electric quantity increment difference value is smaller than the corresponding difference value threshold value, judging that the charging efficiency is normal.

In this embodiment, the charging efficiency is estimated from the mapping relationship between the charging transmitting end and the charging receiving end, the electric quantity increment of the energy storage unit is predicted according to the output power of the charging transmitting end in unit time, that is, the electric quantity standard increment is then compared with the actual electric quantity increment of the energy storage unit to estimate the charging efficiency.

In the embodiment, the power-electric quantity curve is established according to the wireless charging characteristic and the empirical data, wherein the wireless charging characteristic means that the output power is not linearly changed and the electric quantity increment is not linearly changed in the wireless charging process, so that the power-electric quantity curve can be established in sections.

The empirical data is obtained by simulating the obtained power average value in unit time and the electric quantity increment of the corresponding energy storage unit in a laboratory under a standard environment, the independent variable and the dependent variable in the empirical data are determined, and the power-electric quantity curve can be obtained by combining a parameter fitting method, wherein the standard environment refers to a working environment with temperature, humidity and the like which accord with the normal of the intelligent lock body.

In other preferred embodiments, a lookup table representing the correspondence between the power average value per unit time (and corresponding environmental data may be added) and the power increment may be established based on empirical data, and the corresponding power standard increment may be obtained by interpolation.

In a preferred embodiment, the power average is combined with an efficiency assessment model to assess charging efficiency, comprising:

Acquiring a power average value and environment data of the intelligent lock body;

Integrating and inputting the power mean value and the environmental data into an efficiency evaluation model to obtain a corresponding electric quantity standard increment;

According to the embodiment, on the basis of the embodiment, the influence of environmental data (temperature, humidity and the like) on a wireless charging process is considered, the environmental data can be acquired through corresponding sensors or can be set manually, and the power average value and the environmental data in unit time are spliced to form input data of an efficiency evaluation model.

In a specific embodiment, establishing an efficiency assessment model based on the artificial intelligence model includes:

Standard training data are obtained;

The standard training data of the embodiment is obtained in a laboratory, and the standard training data comprises temperature, humidity, power average value in unit time and corresponding electric quantity standard increment, and the nonlinear fitting capacity of the artificial intelligent model is fully utilized to obtain the corresponding electric quantity standard increment.

The artificial intelligence model comprises a deep convolutional neural network model, an RBF neural network model and the like, and the efficiency evaluation model needs to be updated regularly (standard training data can be updated timely) and stored in a control system.

Notably, the data generated in the wireless charging process are all sent to the intelligent terminal through the Bluetooth communication unit.

The working principle of the invention is as follows:

and after the intelligent key receives the charging signal, detecting the power supply unit, and starting wireless charging according to the detection result.

The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.

Claims

1. The utility model provides a wireless charging system of electric power intelligent lock, includes the intelligent lock body, with the inside receiving end matched with that charges of intelligent lock send end that charges to and be used for monitoring the wireless monitoring module who charges of intelligent lock body, its characterized in that:

In the wireless charging process of the intelligent lock body, the control module acquires the output power of the charging transmitting end in real time through the sensor, and evaluates the charging efficiency by combining the electric quantity of the energy storage unit;

The control module evaluates the charging efficiency according to the output power of the energy storage unit and the charging transmitting end, and comprises the following components:

when the absolute value of the electric quantity standard increment and the electric quantity increment difference value is smaller than the corresponding difference value threshold value, judging that the charging efficiency is normal, wherein the difference value threshold value is set according to actual experience;

And combining the power average value with an efficiency evaluation model to evaluate the charging efficiency, wherein the method comprises the following steps of:

2. The wireless charging system of an electric power intelligent lock according to claim 1, wherein the charging transmitting end is arranged in an intelligent key matched with the intelligent lock body;

3. The wireless charging system of the electric power intelligent lock according to claim 2, wherein a power supply unit is arranged in the intelligent key and is cooperated with the charging transmitting end, and the power supply unit is used for charging in a wired mode.

4. The wireless charging system of claim 3, wherein a charging signal is generated from the charge of the energy storage unit prior to wirelessly charging the smart lock;

5. The power smart lock wireless charging system of claim 1, wherein establishing an efficiency assessment model based on the artificial intelligence model comprises: