WO2014176874A1

WO2014176874A1 - Method and device for automatic wakeup of wireless electric power transmission system transmitting end from standby state

Info

Publication number: WO2014176874A1
Application number: PCT/CN2013/085462
Authority: WO
Inventors: 李聃; 董秀莲
Original assignee: 海尔集团技术研发中心; 海尔集团公司
Priority date: 2013-04-28
Filing date: 2013-10-18
Publication date: 2014-11-06
Also published as: CN104124767B; CN104124767A

Abstract

A method and device for automatic wakeup of a wireless electric power transmission system transmitting end from a standby state. The method comprises: a threshold of capacitance change is set for automatic wakeup of the wireless electric power transmission system transmitting end from the standby state (S1); a capacitance change on a transmitting coil when the wireless electric power transmission system transmitting end is in standby is read and transmitted (S2); the capacitance change is received, whether or not the capacitance change is greater than the threshold is determined, and, if the capacitance change is no greater than the threshold, then step (S2) of reading and transmitting the capacitance change on the transmitting coil when the wireless electric power transmission system transmitting end is in standby is executed, and proceed if otherwise (S3); and, the wireless electric power transmission system transmitting end is automatically waked up from the standby state and an energy emission of the transmission coil is activated (S4). The automatic wakeup device (31) comprises a threshold setting module (311), a capacitance induction module (312), a control module (313), and a switchover module (314). The capacitance change of the transmitting coil is acquired, the magnitude of the capacitance change is determined, and whether or not to wakeup from the standby state is determined on the basis of the determination result, the transmitting end is free of energy emission during implementation of the method, and wakeup from standby is allowed by a receiving end coming into proximity. The method and device are of low power consumption when in standby and of high intelligence when waked up.

Description

The present invention claims to be submitted on April 28, 2013, and the application number is 201310156490.X. The applicant is Haier Group Technology R&D Center, Haier Group Company, and the name of the invention. The priority of the Chinese Patent Application for "Method and Apparatus for Automatic Wake-up of Standby State of Wireless Power Transmission System" is incorporated herein by reference.

Technical field

The present invention relates to the field of wireless power supply, and in particular, to a method and apparatus for automatically awakening a standby state of a transmitting end of a wireless power transmission system.

Background technique

If the transmitting end of the wireless power transmission system performs continuous energy emission without the receiving end, energy loss will occur, and electromagnetic interference to the external environment will also increase, which is difficult to meet the energy efficiency rating of the electrical product. Therefore, the system must There is a standby state. In standby mode, the system does not emit energy or emit a small amount of energy. Once a receiver is placed on the transmitter, the system must be able to wake from standby to active.

Standby wake-up usually has manual switch control, contact switch control, intermittent energy emission wake-up according to feedback, independent communication module, and sensor sensing.

The manual switch control causes the transmitting end system to shift from the standby state to the working state. The transmitting end power can be completely turned off when the receiving end does not work. This method does not emit energy at all, but the user needs to manually open the switch, and cannot automatically sense. The user experience is not smart enough.

With contact switch control, only weak power is needed for the switch during standby. When the receiving end is placed on the transmitting end, the contact switch on the transmitting end is automatically triggered to wake up standby, but this method requires the receiving end and the transmitting end to perform Close contact can be achieved, and it is easy to bow.

The transmitting end of the wireless power transmission system uses intermittent energy transmission. According to the change of the voltage/current of the transmitting coil or the digital communication to judge whether there is a receiving end, this method has a high degree of intelligent recognition, but It will cause energy loss during standby and consume more power.

The use of a separate communication module requires constant power to the module and also increases standby power consumption.

Standby wake-up with magnetic field changes is an effective solution. A magnetic field strength sensor is placed at the transmitting end, and a magnetic device is placed at the receiving end. When the receiving end is placed on the transmitting end, the transmitting end sensor can trigger the energy emission control system according to the change of the magnetic field. However, in some environments where some magnetic devices are not suitable for application, it is impossible to perform standby wake-up in this way.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for automatically awakening a standby state of a transmitting end of a wireless power transmission system with low power consumption during standby and high intelligence when waking up.

To this end, the present invention employs the following technical solutions:

A method for automatically waking up a standby state of a transmitting end of a wireless power transmission system, comprising:

S1, setting a threshold value of a capacitance change that automatically wakes up in a standby state of a transmitting end of the wireless power transmission system;

52. Detecting a change in capacitance sensing to obtain a capacitance sensing change value;

53. Determine whether the capacitance sensing change value is greater than a threshold value, if the capacitance sensing change value is not greater than the threshold value, perform step S2, otherwise perform step S4;

54. The wireless power transmission system automatically wakes up in the standby state of the transmitting end.

After the wireless power transmission system automatically wakes up in the standby state, the method further includes: determining whether the receiving end is legal, and if yes, transmitting energy to the receiving end, otherwise, returning to the step

S2.

After the transmitting the energy to the receiving end, the method further includes:

Stop detecting capacitive sensing changes;

If the energy is transmitted to the receiving end, the process returns to step S2.

The determining whether the capacitance sensing change value is greater than a threshold includes:

The capacitance sensing change value is processed by a noise reduction algorithm to determine whether the processed capacitance change is greater than a threshold.

The detecting capacitance sensing changes to detect a capacitive sensation through a single-point or multi-point capacitive sensing component. Should change.

A device for automatically awakening a standby state of a transmitting end of a wireless power transmission system, comprising:

a threshold setting module, configured to set a threshold value of a capacitance sensing change of an automatic wake-up state in a standby state of a wireless power transmission system;

a capacitance sensing module, configured to detect a capacitance sensing change, and obtain a capacitance sensing change value;

The control module is configured to determine whether the capacitance sensing change value is greater than a threshold value, and if the capacitance sensing change value is not greater than a threshold value, perform a function of the capacitance sensing module, otherwise perform a function of the switching module; and the switching module is configured to be used for wireless power The transmission system's transmitter standby state automatically wakes up.

The control module further includes a determining unit, configured to determine whether the receiving end is legal, and if yes, transmit energy to the receiving end, otherwise, perform a function of the capacitive sensing module.

The capacitive sensing module includes a capacitive sensing component, a capacitance change collector, and a peripheral circuit. A switch is disposed between the capacitive sensing component and the capacitance change collector, and the switch is controlled by the switching module, and the receiving is performed. After the end emits energy, it also includes:

The switching module controls the switch to be turned off, and stops detecting the capacitive sensing change;

If the energy is transmitted to the receiving end, the switching module controls the switch to close, performing the function of the capacitive sensing module.

The capacitive sensing component is a single-point capacitive sensing component or a multi-point capacitive sensing component.

The control module further includes a noise reduction unit, and determining whether the capacitance sensing change value is greater than a threshold includes:

The capacitance sensing change value is processed by the noise reduction unit to determine whether the processed capacitance change is greater than a threshold value.

The beneficial effects of the invention are as follows: by obtaining the change of the capacitance of the transmitting coil, judging the magnitude of the capacitance change, and determining whether the standby state is awakened according to the judgment result, during the implementation of the method, there is no energy emission at the transmitting end, and the receiving end is close to wake up standby. The present invention provides a method and apparatus for automatically awakening a standby state of a transmitting end of a wireless power transmission system with low power consumption during standby and high intelligence when waking up.

DRAWINGS 1 is a flow chart of a first embodiment of a method for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to the present invention;

2 is a flow chart showing a second embodiment of a method for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to the present invention;

3 is a block diagram of a first embodiment of an apparatus for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to the present invention;

4A-4D are structural diagrams of a second embodiment of an apparatus for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to the present invention;

Fig. 5 is a structural diagram showing a fourth embodiment of an apparatus for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to the present invention.

Wherein: 312b-transmitting coil; 312c-inductive coil; 312d-sensing disc; 312e-inductive point.

detailed description

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

A flow chart of a first embodiment of a method for automatically waking up a standby state of a transmitting end of a wireless power transmission system of the present invention is shown in FIG.

Step S1, setting a threshold value of a capacitance change that automatically wakes up in a standby state of a transmitting end of the wireless power transmission system;

Step S2: detecting a change in capacitance sensing to obtain a capacitance sensing change value;

Step S3, determining whether the capacitance sensing change value is greater than a threshold value, if the capacitance sensing change value is not greater than the threshold value, performing step S2, otherwise performing step S4;

Step S4: The wireless power transmission system automatically wakes up in the standby state of the transmitting end.

In this embodiment, the method determines the magnitude of the capacitance change by acquiring the capacitance change of the transmitting coil, and determines whether the standby state is awakened according to the determination result, and the transmitting end has no energy emission during the implementation of the method, compared with the prior art. The effect of power consumption reduction is obvious, the intelligence is more superior, and the threshold value of the capacitance change of the automatic wake-up of the standby body is set for the possible misoperation, and the accuracy of the wake-up is improved. A flow chart of a second embodiment of a method for automatically waking up a standby state of a transmitting end of a wireless power transmission system is shown in FIG. 1. This embodiment shows that the wireless power transmission system automatically wakes up in the standby state of the transmitting end, and supplies power to the standby state. the process of:

Step 201: Set a threshold value of a capacitance change of the wireless power transmission system transmitting end to set the automatic wake-up of the standby state of the transmitting end of the wireless power transmission system.

The value of the capacitance change should be determined according to the actual use. For example, the size of the receiving end, the distance between the transmitting end and the receiving end during normal operation, etc., the wide value is suitable for the transmitting end to sense the receiving end. The sense should not be too sensitive, it is easy to cause a false start; nor can the receiving end be placed on the transmitting end and cannot be woken up.

Step 202: When the transmitting end of the wireless power transmission system is in standby, the capacitance change on the transmitting coil is read and transmitted.

When there is a legitimate receiver or other object that may cause a change in capacitance, it affects the capacitance change on the transmitting coil.

Step 203: Receive the capacitance change.

The information transmission manner of the capacitance change includes: interrupt triggering, level rising edge or falling edge query, digital communication.

Step 204: The received capacitance change is processed by a noise reduction algorithm to avoid false triggering. The noise reduction algorithm is used to reduce the impact of the environment on the transmission of the sensing system and the capacitance change. The specific noise reduction algorithm is very rich in the prior art and will not be described here.

Step 205: Determine whether the change in capacitance is greater than a threshold. If the change in capacitance is not greater than the threshold, go to step 202. Otherwise, go to step 206.

This step is the key to the automatic wake-up in the standby state. It is determined by whether the capacitance change value and the threshold value are used to wake up the standby state.

Step 206: The wireless power transmission system automatically wakes up in the standby state of the transmitting end, and starts the energy transmission of the transmitting coil.

Step 207: Cut off the channel for reading and transmitting the change in capacitance.

In order to reduce the energy induction of the capacitive sensing portion during energy transmission, energy loss and coil heating are caused, and after the standby state is awakened, the channel for reading and transmitting the capacitance change is cut off. Step 208: It is determined whether the receiving end is legal. If the receiving end is not legal, step 202 is performed; otherwise, step 209 is performed.

In order to improve the energy utilization efficiency and ensure the correct reception of the received energy, it is necessary to identify the legality of the receiving end after the standby state is awakened. The specific identification method is known in the prior art, and details are not described herein again.

Step 209: The transmitting coil transmits energy to the receiving end.

After confirming that the receiving end is a legitimate receiving end, the energy transfer is officially started.

Step 21 0: Determine whether the energy transmission ends. If the energy transmission ends, go to step 21 1 , otherwise go to step 209.

After the end of the energy transmission, the transmitting end does not immediately perform step 21 1 , considering that it is possible to continuously supply power to multiple receiving ends. After the energy transmission to a single receiving end ends, the transmitting end is still in working state, waiting for a period of time. If no receiving end receives energy, step 21 1 is performed, and the specific waiting time is determined by a control module built in the wireless power transmission system.

Step 21: The transmitting end of the wireless power transmission system enters the standby state, and the channel for reading and transmitting the change of the connected capacitance is performed, and step 202 is performed.

When the transmitting end of the wireless power transmission system enters the standby state, the channel for reading and transmitting the capacitor change that was turned off when the latest wake-up standby state is reconnected, and the system starts to wait for the sensing wake-up standby state of the next capacitor change.

In combination with the foregoing method embodiments, the present invention can wake up the standby state of the system when the receiving end enters the transmitting coil, and judge the legitimacy of the receiving end. After the power supply ends, the system automatically re-enters the standby state to realize the standby state of the wireless power transmission system. Intelligent automatic wake-up, and low energy consumption during standby, improves the energy efficiency rating of wireless power transmission systems.

Corresponding to the method for automatically waking up the standby state of the transmitting end of the wireless power transmission system of the present invention, the present invention also provides a device for automatically waking up the standby state of the transmitting end of the wireless power transmission system.

A block diagram of a first embodiment of an apparatus for automatically waking up a standby state of a transmitting end of a wireless power transmission system of the present invention is shown in FIG. 3, and the apparatus includes:

The threshold setting module 31 1 is used for setting a threshold value of a capacitance sensing change in the standby state of the wireless power transmission system in the standby state;

The capacitance sensing module 312 detects a change in capacitance sensing to obtain a capacitance sensing change value; The control module 31 3 is configured to determine whether the capacitance sensing change value is greater than a threshold value, and if the capacitance sensing change value is not greater than a threshold value, perform a function of the capacitance sensing module, otherwise perform a function of the switching module; Automatically wake up in the standby state of the transmitting end of the wireless power transmission system.

The transmitting end of the wireless power transmission system includes a power module, a control module, a driving module, an inverter module, and a feedback module. The present invention further includes a threshold setting module 31 1 and a capacitance sensing module 312 compared to a general wireless power transmission system transmitting end. And switching module 314, while control module 31 3 also adds a function to determine the change in capacitance. The capacitance sensing module 312 controls the module 31 3 to determine whether the system should continue to be in standby or wake-up from standby by collecting a change in capacitance and outputting this capacitance to the control module 31 3 . When the wireless power transmission system wakes up, the control module 31 3 controls the switching module 314 to switch the transmitting coil into the energy transmitting loop, and the system enters the energy transmission process. In the working state, the power module is controlled by the control module 31 3 to supply power to all the modules, the control module 31 3 outputs the P medical drive module, and the transmitting coil transmits energy to the receiving end; in the standby state, the power module is controlled by the control module 31 3 only The control module 31 3 and the capacitance sensing module 312 are powered, the power supply to other modules is stopped, and the control module stops the P medical output, and the transmitting coil has no energy emission.

FIG. 4A to FIG. 4D, the capacitive sensing module 312 of the device includes a capacitive sensing component, a capacitance change collector 312a, and a second embodiment of the device for automatically awakening the standby state of the wireless power transmission system. The peripheral circuit, the capacitive sensing component is a transmitting coil 312b, an inductive coil 312c, an inductive disc 312d or a sensing point 312e; the transmission mode of the change in the transmitting transmitting coil 312b is interrupt triggering, level rising edge query, level drop Query or digital communication along.

In this embodiment, a plurality of capacitance sensing components and a capacitance change transmission mode are provided, and the energy transmission coil and the capacitance sensing component are shared in a time-sharing manner to save system components, reduce cost, and reduce the difficulty of layout of the coil portion; The sensing component can also be selected as a stand-alone type. The component needs to be placed near the energy transmitting coil, which can be in the form of a coil, square or circular or other shapes. The coil can be larger than the transmitting coil, or can be smaller than the transmitting coil, or equivalent to The size of the transmitting coil is tied to the transmitting coil; the component can also be in the form of an inductive disc. A suitable implementation manner can be selected for the actual size and manufacturing process of the transmitting end of the wireless power transmission system, and the structure of the various electronic components in this embodiment is fine, small, and mature, and has little influence on the volume and cost of the transmitting end, and The receiving end of the present invention does not need to be modified. In a third embodiment of the apparatus for automatically waking up the standby state of the transmitting end of the wireless power transmission system, the control module 31 3 has a built-in noise reduction algorithm, and the control module determines whether the capacitance change is after receiving the capacitance change. The received capacitance change is processed by the noise reduction algorithm to avoid false triggering before being greater than the threshold.

In this embodiment, the noise reduction algorithm is used to reduce the impact of the environment on the transmission of the sensing system and the capacitance change. The specific noise reduction algorithm is very rich in the prior art, and is not described here.

A fourth embodiment of the apparatus for automatically waking up the standby state of the transmitting end of the wireless power transmission system is as shown in FIG. 5. A switch 315 is disposed between the capacitive sensing component and the capacitance change collector 312a, and the control module 31 3 passes through the The switching module 314 controls the switch 315. When the switching module 314 automatically wakes up the standby state of the transmitting end of the wireless power transmission system, and starts the energy emission of the transmitting coil 312b, simultaneously controls the switch 315 to be disconnected, and the reading of the capacitance change is cut off. When the energy transmission of the channel transmitting coil 312b is completed, the transmitting end of the wireless power transmission system enters a standby state, the switch 315 is closed, and the channel for reading and transmitting the capacitance change is performed, and the function of the capacitance sensing module 312 is performed.

During the transmission of energy, the induction circuit may have energy induction to cause energy loss and coil heating. Through the design of the switch, the connection or disconnection of the induction circuit is selected according to the standby or working state of the system, which can reduce energy consumption. It also extends the life of electronic components.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

The method for automatically waking up the standby state of the transmitting end of the wireless power transmission system according to claim 1, wherein after the wireless terminal of the wireless power transmission system automatically wakes up in the standby state, the method further includes:

Determine whether the receiving end is legal, if yes, transmit energy to the receiving end, otherwise, return to the step

S2.

The method for automatically waking up the standby state of the transmitting end of the wireless power transmission system according to claim 2, wherein after the transmitting the energy to the receiving end, the method further includes:

Stop detecting capacitive sensing changes;

The method for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to claim 1, wherein the determining whether the capacitance sensing change value is greater than a threshold value comprises: The capacitance sensing change value is processed to determine whether the processed capacitance change is greater than the threshold value.

The method for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to claim 1, wherein the detecting capacitive sensing change is to detect a capacitive sensing change by a single-point or multi-point capacitive sensing component.

A device for automatically waking up a standby state of a transmitting end of a wireless power transmission system, comprising:

a threshold setting module, configured to set a threshold value of a capacitance sensing change of an automatic wake-up of a standby state of a wireless power transmission system; a capacitance sensing module, configured to detect a capacitance sensing change, and obtain a capacitance sensing change value; and a control module, configured to determine whether the capacitance sensing change value is greater than a threshold value, and if the capacitance sensing change value is not greater than a threshold value, performing a capacitance sensing module The function, otherwise performs the function of the switching module; the switching module is used for automatic wake-up of the standby state of the wireless power transmission system.

The apparatus for automatically waking up the standby state of the transmitting end of the wireless power transmission system according to claim 6, wherein the control module further comprises a determining unit, configured to determine whether the receiving end is legal, and if so, The receiving end transmits energy, otherwise, the function of the capacitive sensing module is performed.

8 . The device of claim 7 , wherein the capacitive sensing module comprises a capacitive sensing component, a capacitance change collector and a peripheral circuit, wherein the capacitive sensing A switch is disposed between the component and the capacitance change collector, and the switch is controlled by the switching module. After the transmitting the energy to the receiving end, the method further includes:

The device for automatically waking up the standby state of the transmitting end of the wireless power transmission system according to claim 8, wherein the capacitive sensing component is a single-point capacitive sensing component or a multi-point capacitive sensing component.

The apparatus for automatically waking up a standby state of a transmitting end of a wireless power transmission system according to claim 6, wherein the control module further comprises a noise reduction unit, wherein the determining whether the capacitance sensing change value is greater than a threshold value Specifically include: