CN111263053A - Wireless power supply monitoring camera and method for real-time bidirectional wireless signal transmission - Google Patents
Wireless power supply monitoring camera and method for real-time bidirectional wireless signal transmission Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及电子领域，尤其涉及一种实时双向无线信号传输的无线供电监控相机及方法。The invention relates to the field of electronics, in particular to a wireless power supply monitoring camera and method for real-time two-way wireless signal transmission.
背景技术Background technique
无线供电是不经由电导体将电力能量从发电装置或供电端转送到电力接收装置的技术，无需物理连接，电能可以近距离无接触地传输给负载，随着科技的不断进步，无线供电也被应用到了很多领域，目前主流手机厂商都推出了无线充电手机，汽车厂商也在大力研发和推广无线充电/供电技术，Wireless power supply is a technology that transfers power energy from a power generating device or power supply end to a power receiving device without using an electrical conductor. No physical connection is required, and electrical energy can be transmitted to the load in a short distance and without contact. With the continuous advancement of technology, wireless power supply has also been adopted. It has been applied to many fields. At present, mainstream mobile phone manufacturers have launched wireless charging mobile phones, and automobile manufacturers are also vigorously developing and promoting wireless charging/power supply technology.
但是，目前在安防监控相机上还没有厂商推出无线充电/供电产品，使用无线供电技术可以带来很多益处，比如相机可以密闭设计，避免雨水和灰尘侵入；可以避免线缆裸露，防止意外损坏；可以使相机小型化，做的更加美观等。在使用无线供电技术时，应该使用无线通信技术与之配合，绝大部分业内厂商已经在相机内部使用了无线通信技术。常见的有WIFI探针、GPS定位模块等。但是，这也面临很多问题，首先，无线通信模块均有一定的时延，即使先进的5G技术也有毫秒级别的时延，由于监控相机的很多控制信号有时序要求，过长的时延不可接受。其次，满足通信速率的无线通信模块的价格比较昂贵，另外，无线通信有被入侵的风险，这一风险主要由模组厂商或通信运营商防护，相机厂商很难控制此问题。最后，无线通信模块对使用环境有要求，当电磁环境比较复杂，或者无线模组所处空间中间隔着金属时，通信质量急剧下降，甚至无法使用。However, at present, no manufacturer has launched wireless charging/power supply products on security surveillance cameras. Using wireless power supply technology can bring many benefits. For example, the camera can be airtightly designed to avoid the intrusion of rain and dust; it can avoid exposed cables and prevent accidental damage; The camera can be miniaturized and made more beautiful. When using wireless power supply technology, wireless communication technology should be used to cooperate with it. Most manufacturers in the industry have already used wireless communication technology inside the camera. Common ones are WIFI probes, GPS positioning modules, etc. However, this also faces many problems. First, wireless communication modules have a certain delay. Even advanced 5G technology has a delay of milliseconds. Since many control signals of surveillance cameras have timing requirements, excessive delay is unacceptable. . Secondly, the price of wireless communication modules that meet the communication rate is relatively expensive. In addition, wireless communication has the risk of being invaded. This risk is mainly protected by module manufacturers or communication operators, and it is difficult for camera manufacturers to control this problem. Finally, the wireless communication module has requirements for the use environment. When the electromagnetic environment is complicated, or when the space where the wireless module is located is separated by metal, the communication quality drops sharply, and even cannot be used.
发明内容SUMMARY OF THE INVENTION
鉴于以上所述现有技术的缺点，本发明提供一种实时双向无线信号传输的无线供电监控相机及方法，以解决上述技术问题。In view of the above-mentioned shortcomings of the prior art, the present invention provides a wireless power supply monitoring camera and method for real-time two-way wireless signal transmission to solve the above-mentioned technical problems.
本发明提供的实时双向无线信号传输的无线供电监控相机，包括：相机本体和用于与所述相机本体进行无线通信并为其无线供电的供电装置；The wireless power supply monitoring camera with real-time two-way wireless signal transmission provided by the present invention includes: a camera body and a power supply device for wirelessly communicating with the camera body and wirelessly supplying power to the camera body;
所述供电装置包括第一无线通信电路，以及the power supply includes a first wireless communication circuit, and
供电模块，用于供电侧的电能变换并输出电能信号；The power supply module is used for power conversion on the power supply side and output power signal;
所述相机本体内部设置有第二无线通信电路，以及The camera body is internally provided with a second wireless communication circuit, and
受电模块，用于接收所述电能信号和进行受电侧电能变换；a power receiving module for receiving the power signal and performing power conversion on the power receiving side;
所述供电模块和受电模块之间通过电磁耦合传递电能，所述第一无线通信电路与第二无线通信电路之间通过控制电磁耦合时的工作频率进行双向无线通信。Power is transferred between the power supply module and the power receiving module through electromagnetic coupling, and two-way wireless communication is performed between the first wireless communication circuit and the second wireless communication circuit by controlling the operating frequency during electromagnetic coupling.
可选的，所述供电模块包括互相连接的供电侧耦合机构和用于进行谐振补偿的供电侧补偿模块，所述供电侧补偿模块包括若干等效电容，通过改变等效电容的工作状态控制供电侧耦合机构的工作频率，进而控制供电侧发送无线信号。Optionally, the power supply module includes a power supply side coupling mechanism connected to each other and a power supply side compensation module for performing resonance compensation, the power supply side compensation module includes a plurality of equivalent capacitors, and the power supply is controlled by changing the working state of the equivalent capacitors. The working frequency of the side coupling mechanism, and then control the power supply side to send wireless signals.
可选的，所述受电模块包括互相连接的受电侧耦合机构和用于进行谐振补偿的受电侧补偿模块，所述受电侧补偿模块包括若干等效电容，通过改变等效电容的工作状态控制受电侧耦合机构的工作频率，进而控制受电侧发送无线信号。Optionally, the power receiving module includes a power receiving side coupling mechanism connected to each other and a power receiving side compensation module for performing resonance compensation, and the power receiving side compensation module includes several equivalent capacitors. The working state controls the working frequency of the power-receiving side coupling mechanism, and then controls the power-receiving side to send wireless signals.
可选的，所述供电侧补偿模块包括第一开关、互相并行连接的第一供电侧等效电容和第二供电侧等效电容，所述第一开关通过第一供电侧等效电容和第二供电侧等效电容形成的并联结构与供电侧耦合机构连接。Optionally, the power supply side compensation module includes a first switch, a first power supply side equivalent capacitor and a second power supply side equivalent capacitor connected in parallel with each other, and the first switch passes through the first power supply side equivalent capacitor and the second power supply side equivalent capacitor. The parallel structure formed by the equivalent capacitances of the two power supply sides is connected to the power supply side coupling mechanism.
可选的，所述受电侧补偿模块包括第二开关、互相并行连接的第一受电侧等效电容和第二受电侧等效电容，所述第二开关通过第一受电侧等效电容和第二受电侧等效电容形成的并联结构与受电侧耦合机构连接。Optionally, the power receiving side compensation module includes a second switch, a first power receiving side equivalent capacitor and a second power receiving side equivalent capacitor connected in parallel with each other, and the second switch passes through the first power receiving side, etc. The parallel structure formed by the effective capacitance and the equivalent capacitance of the second power receiving side is connected to the power receiving side coupling mechanism.
可选的，还包括：Optionally, also include:
频率检测模块，用于检测耦合机构的工作频率；Frequency detection module, used to detect the working frequency of the coupling mechanism;
控制器，用于发出电能变换控制信号和逆变控制信号。The controller is used for sending electric energy conversion control signals and inverter control signals.
本发明还提供一种实时双向无线信号传输的无线供电方法，包括：The present invention also provides a wireless power supply method for real-time two-way wireless signal transmission, including:
供电模块将供电侧的电能变换并输出电能信号；The power supply module converts the power on the power supply side and outputs the power signal;
受电模块接收所述电能信号，并进行受电侧电能变换；The power receiving module receives the power signal and performs power conversion on the power receiving side;
所述供电模块和受电模块之间通过电磁耦合传递电能，Electric energy is transferred between the power supply module and the power receiving module through electromagnetic coupling,
通过控制电磁耦合时的工作频率进行双向无线通信。Two-way wireless communication is performed by controlling the operating frequency during electromagnetic coupling.
可选的，在供电侧和受电侧分别设置若干等效电容进行谐振补偿，通过改变等效电容的工作状态控制供电侧和受电侧耦合机构的工作频率，进而控制供电侧和受电侧发送无线信号。Optionally, several equivalent capacitors are respectively set on the power supply side and the power receiving side for resonance compensation, and the operating frequency of the coupling mechanism on the power supply side and the power receiving side is controlled by changing the working state of the equivalent capacitor, thereby controlling the power supply side and the power receiving side. Send wireless signals.
可选的，通过共用同一组耦合机构分别进行供电侧和受电侧的无线供电和无线通信。Optionally, wireless power supply and wireless communication are respectively performed on the power supply side and the power receiving side by sharing the same set of coupling mechanisms.
可选的，在供电侧设置供电侧补偿模块，所述供电侧补偿模块包括第一开关、互相并行连接的第一供电侧等效电容和第二供电侧等效电容，所述第一开关通过第一供电侧等效电容和第二供电侧等效电容形成的并联结构与供电侧耦合机构连接，通过控制第一开关切换第一供电侧等效电容和第二供电侧等效电容的工作状态，Optionally, a power supply side compensation module is provided on the power supply side, and the power supply side compensation module includes a first switch, a first power supply side equivalent capacitor and a second power supply side equivalent capacitor connected in parallel with each other, and the first switch passes through. The parallel structure formed by the equivalent capacitance of the first power supply side and the equivalent capacitance of the second power supply side is connected to the coupling mechanism of the power supply side, and the working states of the equivalent capacitance of the first power supply side and the equivalent capacitance of the second power supply side are switched by controlling the first switch ,
根据预先设置的编码规则控制供电侧发送无线数字信号。Control the power supply side to send wireless digital signals according to preset coding rules.
可选的，在受电侧设置受电侧补偿模块，所述受电侧补偿模块包括第二开关、互相并行连接的第一受电侧等效电容和第二受电侧等效电容，所述第二开关通过第一受电侧等效电容和第二受电侧等效电容形成的并联结构与受电侧耦合机构连接，通过控制第二开关切换第一受电侧等效电容和第二受电侧等效电容的工作状态，Optionally, a power-receiving side compensation module is provided on the power-receiving side, and the power-receiving-side compensation module includes a second switch, a first power-receiving side equivalent capacitor and a second power-receiving side equivalent capacitor connected in parallel with each other, so The second switch is connected to the power-receiving side coupling mechanism through a parallel structure formed by the equivalent capacitance of the first power-receiving side and the equivalent capacitance of the second power-receiving side, and the second switch is controlled to switch the equivalent capacitance of the first power-receiving side and the second power-receiving side. The working state of the equivalent capacitor on the receiving side,
根据预先设置的编码规则控制受电侧发送无线数字信号。Control the power receiving side to send wireless digital signals according to preset coding rules.
可选的，分别对受电侧和供电侧进行实时频率检测，根据频率检测结果和预先设置的解码规则，对无线数字信号进行解码，完成双向无线通信。Optionally, real-time frequency detection is performed on the power receiving side and the power supply side respectively, and the wireless digital signal is decoded according to the frequency detection result and the preset decoding rule to complete the two-way wireless communication.
本发明的有益效果：本发明中的实时双向无线信号传输的无线供电监控相机及方法，能够实现实时的无线信号传输，解决了使用蜂窝网模块，WiFi模块等无线通信模块等带来的时延问题，无线信号的传输方式基于近场耦合，耦合空间小，易于屏蔽外界干扰，能够在复杂电磁环境下正常工作，通过自主设计编码和解码，保证了控制系统信息的安全，本发明可以大大节省装置的空间，降低装置的成本，利于装置小型化。Beneficial effects of the present invention: the wireless power supply monitoring camera and method for real-time two-way wireless signal transmission in the present invention can realize real-time wireless signal transmission, and solve the delay caused by the use of wireless communication modules such as cellular network modules and WiFi modules. The problem is that the transmission method of wireless signals is based on near-field coupling, the coupling space is small, it is easy to shield external interference, and it can work normally in complex electromagnetic environments. The space of the device is reduced, the cost of the device is reduced, and the miniaturization of the device is facilitated.
附图说明Description of drawings
图1是本发明实施例中实时双向无线信号传输的无线供电监控相机的结构示意图。FIG. 1 is a schematic structural diagram of a wireless power supply monitoring camera for real-time two-way wireless signal transmission in an embodiment of the present invention.
图2是本发明实施例中实时双向无线信号传输的无线供电监控相机的无线电能传输部分的等效电路示意图。2 is a schematic diagram of an equivalent circuit of a wireless power transmission part of a wireless power supply monitoring camera for real-time two-way wireless signal transmission in an embodiment of the present invention.
图3是本发明实施例中实时双向无线信号传输的无线供电监控相机的无线信号传输部分的等效电路示意图。3 is a schematic diagram of an equivalent circuit of a wireless signal transmission part of a wireless power supply monitoring camera for real-time two-way wireless signal transmission in an embodiment of the present invention.
图4是本发明实施例中实时双向无线信号传输的无线供电监控相机的等效电路结构示意图。4 is a schematic structural diagram of an equivalent circuit of a wireless power supply monitoring camera for real-time two-way wireless signal transmission in an embodiment of the present invention.
附图标记说明：Description of reference numbers:
1-相机本体。1- The camera body.
2-供电装置。2- Power supply unit.
具体实施方式Detailed ways
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。需说明的是，在不冲突的情况下，以下实施例及实施例中的特征可以相互组合。The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.
需要说明的是，以下实施例中所提供的图示仅以示意方式说明本发明的基本构想，遂图式中仅显示与本发明中有关的组件而非按照实际实施时的组件数目、形状及尺寸绘制，其实际实施时各组件的型态、数量及比例可为一种随意的改变，且其组件布局型态也可能更为复杂。It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic way, so the drawings only show the components related to the present invention rather than the number, shape and number of components in actual implementation. For dimension drawing, the type, quantity and proportion of each component can be changed at will in actual implementation, and the component layout may also be more complicated.
在下文描述中，探讨了大量细节，以提供对本发明实施例的更透彻的解释，然而，对本领域技术人员来说，可以在没有这些具体细节的情况下实施本发明的实施例是显而易见的，在其他实施例中，以方框图的形式而不是以细节的形式来示出公知的结构和设备，以避免使本发明的实施例难以理解。In the following description, numerous details are discussed to provide a more thorough explanation of embodiments of the present invention, however, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details, In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring embodiments of the invention.
本实施例中的实时双向无线信号传输的无线供电监控相机，包括：相机本体1和用于与相机本体1进行无线通信并为其无线供电的供电装置2；The wireless power supply monitoring camera for real-time two-way wireless signal transmission in this embodiment includes: a
供电装置2包括第一无线通信电路，以及The
供电模块，用于供电侧的电能变换并输出电能信号；The power supply module is used for power conversion on the power supply side and output power signal;
所述相机本体1内部设置有第二无线通信电路，以及The
受电模块，用于接收所述电能信号和进行受电侧电能变换；a power receiving module for receiving the power signal and performing power conversion on the power receiving side;
供电模块和受电模块之间通过电磁耦合传递电能，所述第一无线通信电路与第二无线通信电路之间通过控制电磁耦合时的工作频率进行双向无线通信。Power is transferred between the power supply module and the power receiving module through electromagnetic coupling, and two-way wireless communication is performed between the first wireless communication circuit and the second wireless communication circuit by controlling the operating frequency during electromagnetic coupling.
在本实施例中，相机本体1和供电装置2之间是基于同一耦合机构的，通过第一无线通信电路与第二无线通信电路之间实时双向无线信号传输，成本较低，可复用性较高，一方面可以提高监控相机的稳定性和可靠性，另一方面，还能够使相机实现一体化设计和小型化设计，便于进行更加美观精致的设计。In this embodiment, the
在本实施例中，主要包含2个部分：无线供电部分和无线信号传输部分，结构的等效实物图如图1所示，本实施例中的上半部分为相机本体1，其结构采用目前常见的枪形监控相机，当然也可以采用其他外形结构的相机，与目前业内常见的相机相比，内部只需要增加无线受电装置和相机侧无线信号传输电路。下半部分是供电装置2，内部包含电能变换装置和供电侧无线信号传输电路。上下部分之间隔着空气间隙，也可以是其他非金属材料。本领域技术人员可以知晓，在考虑实际情况下，两者之间间隔可以做到很小，很容易做到毫米级别，中间表示空气气隙或者也可以是其他非金属材料，例如亚克力板材等，再此不再赘述。In this embodiment, it mainly includes two parts: a wireless power supply part and a wireless signal transmission part. The equivalent physical diagram of the structure is shown in Figure 1. The upper part in this embodiment is the
如图2所示，在本实施例中，针对无线供电部分：相机本体1设置有第二无线通信电路和受电模块，受电模块包括互相连接的受电侧耦合机构和用于进行谐振补偿的受电侧补偿模块，受电侧补偿模块包括若干等效电容，通过改变等效电容的工作状态控制受电侧耦合机构的工作频率，进而控制受电侧发送无线信号。本实施例中的受电侧耦合机构为受电线圈，相应的，还包括受电侧信号加载电路，受电侧电能变换电路，信号解码电路。下半部分为供电装置2包括第一无线通信电路和供电模块，供电模块包括互相连接的供电侧耦合机构和用于进行谐振补偿的供电侧补偿模块，供电侧补偿模块包括若干等效电容，通过改变等效电容的工作状态控制供电侧耦合机构的工作频率，进而控制供电侧发送无线信号。本实施例中的供电侧耦合机构为无线供电线圈，相应的还包括供电侧信号加载电路，信号解码电路，电能变换电路。As shown in FIG. 2 , in this embodiment, for the wireless power supply part: the
如图2所示，在本实施例中，供电装置从电网接收220V/50Hz工频交流电，经过整流，电能变换(如DC/DC)，高频逆变等环节，输出高频交流电。直接逆变之后输出的是高频交流方波，含有丰富的谐波分量。为了提高系统效率，避免谐波干扰，需要进行谐振补偿。本实施例中补偿的方案主要是加入电容(或电容阵列)使供电装置侧和受电装置侧同时达到谐振状态，从而达到最大的功率传输。受电模块接收到高频电能之后，进行整流和电压变换，就可以得到监控相机需要的电能。本实施例中的供电侧控制器主要输出电能变换控制信号和逆变控制信号，受电侧的监控相机也输出电能变换控制信号。As shown in FIG. 2 , in this embodiment, the power supply device receives 220V/50Hz power frequency alternating current from the power grid, and outputs high-frequency alternating current through rectification, power conversion (such as DC/DC), and high-frequency inverter. After direct inversion, the output is a high-frequency AC square wave, which is rich in harmonic components. In order to improve system efficiency and avoid harmonic interference, resonance compensation is required. The compensation scheme in this embodiment is mainly to add capacitors (or capacitor arrays) to make the power supply device side and the power receiving device side reach a resonance state at the same time, so as to achieve maximum power transmission. After receiving the high-frequency power, the power receiving module performs rectification and voltage conversion to obtain the power required by the monitoring camera. The controller on the power supply side in this embodiment mainly outputs the power conversion control signal and the inverter control signal, and the monitoring camera on the power receiving side also outputs the power conversion control signal.
如图3所示，在本实施例中，针对无线信号传输部分，供电侧补偿模块包括第一开关、互相并行连接的第一供电侧等效电容和第二供电侧等效电容，第一开关通过第一供电侧等效电容和第二供电侧等效电容形成的并联结构与供电侧耦合机构连接。相应的，受电侧补偿模块包括第二开关、互相并行连接的第一受电侧等效电容和第二受电侧等效电容，第二开关通过第一受电侧等效电容和第二受电侧等效电容形成的并联结构与受电侧耦合机构连接。根据磁耦合型无线供电系统的基本原理，耦合机构主要是两个间隔一定距离的线圈。因此，可以将其等效为耦合系数较小的变压器。供电侧的等效电感为LP，对应补偿装置的等效电容为CP1；相机侧的等效电感为LS，对应补偿装置的等效电容为CS1。本实施例为了实现信号的无线传输，在供电侧再增加一个补偿装置，其等效电容为CP2，同时在相机侧再增加一个补偿装置，其等效电容为CS2。供电侧和相机侧的等效电容可以通过开关来控制，将其接入到系统中，或者从系统中切除。As shown in FIG. 3 , in this embodiment, for the wireless signal transmission part, the power supply side compensation module includes a first switch, a first power supply side equivalent capacitor and a second power supply side equivalent capacitor connected in parallel with each other, and the first switch The parallel structure formed by the equivalent capacitance of the first power supply side and the equivalent capacitance of the second power supply side is connected to the coupling mechanism of the power supply side. Correspondingly, the power receiving side compensation module includes a second switch, a first power receiving side equivalent capacitor and a second power receiving side equivalent capacitor connected in parallel with each other, and the second switch passes through the first power receiving side equivalent capacitor and the second power receiving side equivalent capacitor. The parallel structure formed by the equivalent capacitance on the power receiving side is connected with the coupling mechanism on the power receiving side. According to the basic principle of the magnetic coupling wireless power supply system, the coupling mechanism is mainly two coils separated by a certain distance. Therefore, it can be equivalent to a transformer with a smaller coupling coefficient. The equivalent inductance of the power supply side is L P , and the equivalent capacitance of the corresponding compensation device is C P1 ; the equivalent inductance of the camera side is L S , and the equivalent capacitance of the corresponding compensation device is C S1 . In this embodiment, in order to realize wireless transmission of signals, another compensation device is added on the power supply side, and its equivalent capacitance is C P2 , and at the same time, another compensation device is added on the camera side, and its equivalent capacitance is C S2 . The equivalent capacitance on the power supply side and the camera side can be controlled by switches, which can be connected to the system or removed from the system.
在本实施例中，SP为供电侧开关，SS为相机侧开关。其工作原理类似单刀双掷开关，当SP不断切换时，将向相机侧发送0、1信号，而当SS不断切换时，相机侧将向供电侧发送0、1信号。根据自定义的编码和解码方案，即可得到传输的实际信息，例如相机发送的灯光控制信号或供电侧发送的电网同步信号等。开关SP和SS的切换状态，可以使系统工作在以下4种情况，如表1所示，将其分别对应最右列的信息，则可以通过频率检测得到不同信息。In this embodiment, SP is a power supply side switch, and S S is a camera side switch. Its working principle is similar to a single-pole double-throw switch. When the S P is continuously switched, it will send 0, 1 signals to the camera side, and when the S S is continuously switched, the camera side will send 0, 1 signals to the power supply side. According to the customized encoding and decoding scheme, the actual information transmitted can be obtained, such as the light control signal sent by the camera or the power grid synchronization signal sent by the power supply side. The switching states of the switches S P and S S can make the system work in the following four situations, as shown in Table 1, which correspond to the information in the rightmost column respectively, and different information can be obtained through frequency detection.
表1Table 1
在本实施例中，当开关切换时，系统的工作频率会不断的变化。因此，通过频率检测模块检测当前系统工作频率，并反馈给控制器处理，就可以在供电侧和相机之间实现信息的实时无线双向传输，本领域技术人员可以知晓，本实施例中的开关类似单刀双掷的实现方式只是其中的一种实现方式，其他通过控制等效电容的工作状态来实现频率控制均可实现上述功能，再根据频率变化与0、1信号建立映射关系即可实现无线信号传输，再此不再赘述。本实施例中的无线供电部分和无线信号传输部分基于同一耦合机构，图4为图1中结构对应的，将二者相结合后的等效实际电路。In this embodiment, when the switch is switched, the operating frequency of the system will change continuously. Therefore, the current system operating frequency is detected by the frequency detection module and fed back to the controller for processing, so that real-time wireless two-way transmission of information can be realized between the power supply side and the camera. Those skilled in the art can know that the switch in this embodiment is similar to The implementation of single-pole double-throw is only one of them. Others can realize the above functions by controlling the working state of the equivalent capacitor to realize the frequency control, and then establish a mapping relationship with the 0 and 1 signals according to the frequency change to realize the wireless signal. transmission, and will not be repeated here. The wireless power supply part and the wireless signal transmission part in this embodiment are based on the same coupling mechanism, and FIG. 4 is an equivalent actual circuit after combining the two structures corresponding to the structure in FIG. 1 .
在本实施例中，控制器可以是通用处理器，包括中央处理器(Central ProcessingUnit，简称CPU)、网络处理器(Network Processor，简称NP)等；还可以是数字信号处理器(Digital Signal Processing，简称DSP)、专用集成电路(Application SpecificIntegrated Circuit，简称ASIC)、现场可编程门阵列(Field－Programmable Gate Array，简称FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。In this embodiment, the controller may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it may also be a digital signal processor (Digital Signal Processing, DSP for short), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.
相应的，本实施例还提供一种实时双向无线信号传输的无线供电方法，包括：Correspondingly, this embodiment also provides a wireless power supply method for real-time two-way wireless signal transmission, including:
供电模块将供电侧的电能变换并输出电能信号；The power supply module converts the power on the power supply side and outputs the power signal;
受电模块接收所述电能信号，并进行受电侧的电能变换；The power receiving module receives the power signal and performs power conversion on the power receiving side;
所述供电模块和受电模块之间通过电磁耦合传递电能，Electric energy is transferred between the power supply module and the power receiving module through electromagnetic coupling,
通过控制电磁耦合时的工作频率进行双向无线通信。Two-way wireless communication is performed by controlling the operating frequency during electromagnetic coupling.
在本实施例中，在供电侧和受电侧分别设置若干等效电容进行谐振补偿，通过改变等效电容的工作状态控制供电侧和受电侧耦合机构的工作频率，进而控制供电侧和受电侧发送无线信号。通过共用同一组耦合机构分别进行供电侧和受电侧的无线供电和无线通信。In this embodiment, several equivalent capacitors are respectively set on the power supply side and the power receiving side to perform resonance compensation, and the operating frequency of the coupling mechanism on the power supply side and the power receiving side is controlled by changing the working state of the equivalent capacitor, thereby controlling the power supply side and the power receiving side. The electrical side sends wireless signals. The wireless power supply and wireless communication of the power supply side and the power receiving side are respectively performed by sharing the same set of coupling mechanisms.
在本实施例中，在供电侧设置供电侧补偿模块，供电侧补偿模块包括第一开关、互相并行连接的第一供电侧等效电容和第二供电侧等效电容，所述第一开关通过第一供电侧等效电容和第二供电侧等效电容形成的并联结构与供电侧耦合机构连接，通过控制第一开关切换第一供电侧等效电容和第二供电侧等效电容的工作状态，根据预先设置的编码规则控制供电侧发送无线数字信号。在受电侧设置受电侧补偿模块，受电侧补偿模块包括第二开关、互相并行连接的第一受电侧等效电容和第二受电侧等效电容，所述第二开关通过第一受电侧等效电容和第二受电侧等效电容形成的并联结构与受电侧耦合机构连接，通过控制第二开关切换第一受电侧等效电容和第二受电侧等效电容的工作状态，根据预先设置的编码规则控制受电侧发送无线数字信号。分别对受电侧和供电侧进行实时频率检测，根据频率检测结果和预先设置的解码规则，对无线数字信号进行解码，完成双向无线通信。In this embodiment, a power supply side compensation module is provided on the power supply side, and the power supply side compensation module includes a first switch, a first power supply side equivalent capacitor and a second power supply side equivalent capacitor connected in parallel with each other, and the first switch passes through The parallel structure formed by the equivalent capacitance of the first power supply side and the equivalent capacitance of the second power supply side is connected to the coupling mechanism of the power supply side, and the working states of the equivalent capacitance of the first power supply side and the equivalent capacitance of the second power supply side are switched by controlling the first switch , and control the power supply side to send wireless digital signals according to the preset coding rules. A power receiving side compensation module is arranged on the power receiving side, and the power receiving side compensation module includes a second switch, a first power receiving side equivalent capacitor and a second power receiving side equivalent capacitor which are connected in parallel with each other, and the second switch passes through the first power receiving side equivalent capacitor and the second power receiving side equivalent capacitor. A parallel structure formed by an equivalent capacitor on the power receiving side and an equivalent capacitor on the second power receiving side is connected to the coupling mechanism on the power receiving side, and the equivalent capacitor on the first power receiving side and the equivalent capacitor on the second power receiving side are switched by controlling a second switch. The working state of the capacitor controls the power receiving side to send wireless digital signals according to the preset coding rules. The real-time frequency detection is performed on the power receiving side and the power supply side respectively, and the wireless digital signal is decoded according to the frequency detection result and the preset decoding rules to complete the two-way wireless communication.
如图2所示，在本实施例中，针对无线供电部分：相机本体1设置有第二无线通信电路和受电模块，受电模块包括互相连接的受电侧耦合机构和用于进行谐振补偿的受电侧补偿模块，受电侧补偿模块包括若干等效电容，通过改变等效电容的工作状态控制受电侧耦合机构的工作频率，进而控制受电侧发送无线信号。本实施例中的受电侧耦合机构为受电线圈，相应的，还包括受电侧信号加载电路，受电侧电能变换电路，信号解码电路。下半部分为供电装置2包括第一无线通信电路和供电模块，供电模块包括互相连接的供电侧耦合机构和用于进行谐振补偿的供电侧补偿模块，供电侧补偿模块包括若干等效电容，通过改变等效电容的工作状态控制供电侧耦合机构的工作频率，进而控制供电侧发送无线信号。本实施例中的供电侧耦合机构为无线供电线圈，相应的还包括供电侧信号加载电路，信号解码电路，电能变换电路。As shown in FIG. 2 , in this embodiment, for the wireless power supply part: the
如图2所示，在本实施例中，供电装置从电网接收220V/50Hz工频交流电，经过整流，电能变换(如DC/DC)，高频逆变等环节，输出高频交流电。直接逆变之后输出的是高频交流方波，含有丰富的谐波分量。为了提高系统效率，避免谐波干扰，需要进行谐振补偿。本实施例中补偿的方案主要是加入电容(或电容阵列)使供电装置侧和受电装置侧同时达到谐振状态，从而达到最大的功率传输。受电模块接收到高频电能之后，进行整流和电压变换，就可以得到监控相机需要的电能。本实施例中的供电侧控制器主要输出电能变换控制信号和逆变控制信号，受电侧的监控相机也输出电能变换控制信号。As shown in FIG. 2 , in this embodiment, the power supply device receives 220V/50Hz power frequency alternating current from the power grid, and outputs high-frequency alternating current through rectification, power conversion (such as DC/DC), and high-frequency inverter. After direct inversion, the output is a high-frequency AC square wave, which is rich in harmonic components. In order to improve system efficiency and avoid harmonic interference, resonance compensation is required. The compensation scheme in this embodiment is mainly to add capacitors (or capacitor arrays) to make the power supply device side and the power receiving device side reach a resonance state at the same time, so as to achieve maximum power transmission. After receiving the high-frequency power, the power receiving module performs rectification and voltage conversion to obtain the power required by the monitoring camera. The controller on the power supply side in this embodiment mainly outputs the power conversion control signal and the inverter control signal, and the monitoring camera on the power receiving side also outputs the power conversion control signal.
如图3所示，在本实施例中，针对无线信号传输部分，供电侧补偿模块包括第一开关、互相并行连接的第一供电侧等效电容和第二供电侧等效电容，第一开关通过第一供电侧等效电容和第二供电侧等效电容形成的并联结构与供电侧耦合机构连接。相应的，受电侧补偿模块包括第二开关、互相并行连接的第一受电侧等效电容和第二受电侧等效电容，第二开关通过第一受电侧等效电容和第二受电侧等效电容形成的并联结构与受电侧耦合机构连接。根据磁耦合型无线供电系统的基本原理，耦合机构主要是两个间隔一定距离的线圈。因此，可以将其等效为耦合系数较小的变压器。供电侧的等效电感为LP，对应补偿装置的等效电容为CP1；相机侧的等效电感为LS，对应补偿装置的等效电容为CS1。本实施例为了实现信号的无线传输，在供电侧再增加一个补偿装置，其等效电容为CP2，同时在相机侧再增加一个补偿装置，其等效电容为CS2。供电侧和相机侧的等效电容可以通过开关来控制，将其接入到系统中，或者从系统中切除。As shown in FIG. 3 , in this embodiment, for the wireless signal transmission part, the power supply side compensation module includes a first switch, a first power supply side equivalent capacitor and a second power supply side equivalent capacitor connected in parallel with each other, and the first switch The parallel structure formed by the equivalent capacitance of the first power supply side and the equivalent capacitance of the second power supply side is connected to the coupling mechanism of the power supply side. Correspondingly, the power receiving side compensation module includes a second switch, a first power receiving side equivalent capacitor and a second power receiving side equivalent capacitor connected in parallel with each other, and the second switch passes through the first power receiving side equivalent capacitor and the second power receiving side equivalent capacitor. The parallel structure formed by the equivalent capacitance on the power receiving side is connected with the coupling mechanism on the power receiving side. According to the basic principle of the magnetic coupling wireless power supply system, the coupling mechanism is mainly two coils separated by a certain distance. Therefore, it can be equivalent to a transformer with a smaller coupling coefficient. The equivalent inductance of the power supply side is L P , and the equivalent capacitance of the corresponding compensation device is C P1 ; the equivalent inductance of the camera side is L S , and the equivalent capacitance of the corresponding compensation device is C S1 . In this embodiment, in order to realize wireless transmission of signals, another compensation device is added on the power supply side, and its equivalent capacitance is C P2 , and at the same time, another compensation device is added on the camera side, and its equivalent capacitance is C S2 . The equivalent capacitance on the power supply side and the camera side can be controlled by switches, which can be connected to the system or removed from the system.
在本实施例中，SP为供电侧开关，SS为相机侧开关。其工作原理类似单刀双掷开关，当SP不断切换时，将向相机侧发送0、1信号，而当SS不断切换时，相机侧将向供电侧发送0、1信号。根据自定义的编码和解码方案，即可得到传输的实际信息，例如相机发送的灯光控制信号或供电侧发送的电网同步信号等。在本实施例中，当开关切换时，系统的工作频率会不断的变化。因此，通过频率检测模块检测当前系统工作频率，并反馈给控制器处理，就可以在供电侧和相机之间实现信息的实时无线双向传输，本领域技术人员可以知晓，本实施例中的开关类似单刀双掷的实现方式只是其中的一种实现方式，其他通过控制等效电容的工作状态来实现频率控制均可实现上述功能，再根据频率变化与0、1信号建立映射关系即可实现无线信号传输，再此不再赘述。In this embodiment, SP is a power supply side switch, and S S is a camera side switch. Its working principle is similar to a single-pole double-throw switch. When the S P is constantly switched, it will send 0, 1 signals to the camera side, and when the S S is constantly switching, the camera side will send 0, 1 signals to the power supply side. According to the customized encoding and decoding scheme, the actual information transmitted can be obtained, such as the light control signal sent by the camera or the power grid synchronization signal sent by the power supply side. In this embodiment, when the switch is switched, the operating frequency of the system will change continuously. Therefore, the current system operating frequency is detected by the frequency detection module and fed back to the controller for processing, so that real-time wireless two-way transmission of information can be realized between the power supply side and the camera. Those skilled in the art can know that the switch in this embodiment is similar to The implementation of single-pole double-throw is only one of them. Others can realize the above functions by controlling the working state of the equivalent capacitor to realize the frequency control, and then establish a mapping relationship with the 0 and 1 signals according to the frequency change to realize the wireless signal. transmission, and will not be repeated here.
在上述实施例中，除非另外规定，否则通过使用“第一”、“第二”等序号对共同的对象进行描述，只表示其指代相同对象的不同实例，而非是采用表示被描述的对象必须采用给定的顺序，无论是时间地、空间地、排序地或任何其他方式。In the above-mentioned embodiments, unless otherwise specified, common objects are described by using serial numbers such as "first", "second", etc., only to indicate that they refer to different instances of the same object, rather than to indicate that the described object is used. Objects must be in a given order, whether temporally, spatially, ordinal or any other way.
在上述实施例中，说明书对“本实施例”、“一实施例”、“另一实施例”、或“其他实施例”的提及表示结合实施例说明的特定特征、结构或特性包括在至少一些实施例中，但不必是全部实施例。“本实施例”、“一实施例”、“另一实施例”的多次出现不一定全部都指代相同的实施例。如果说明书描述了部件、特征、结构或特性“可以”、“或许”或“能够”被包括，则该特定部件、特征、结构或特性“可以”、“或许”或“能够”被包括，则该特定部件、特征、结构或特性不是必须被包括的。In the above-described embodiments, references in the specification to "this embodiment," "an embodiment," "another embodiment," or "other embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in the In at least some embodiments, but not necessarily all embodiments. The multiple appearances of "this embodiment," "an embodiment," and "another embodiment" are not necessarily all referring to the same embodiment. If the specification states that a part, feature, structure or characteristic "may", "may" or "could" be included, then that particular part, feature, structure or characteristic "may", "might" or "could" be included, then The particular component, feature, structure or characteristic is not required to be included.
在上述实施例中，尽管已经结合了本发明的具体实施例对本发明进行了描述，但是根据前面的描述，这些实施例的很多替换、修改和变形对本领域普通技术人员来说将是显而易见的。例如，其他存储结构(例如，动态RAM(DRAM))可以使用所讨论的实施例。本发明的实施例旨在涵盖落入所附权利要求的宽泛范围之内的所有这样的替换、修改和变型。In the above embodiments, although the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art from the foregoing description. For example, other memory structures such as dynamic RAM (DRAM) may use the discussed embodiments. Embodiments of the present invention are intended to cover all such alternatives, modifications and variations that fall within the broad scope of the appended claims.
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.
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