WO2016045093A1 - Wireless internet access terminal, current limiting control apparatus and current limiting control method - Google Patents

Wireless internet access terminal, current limiting control apparatus and current limiting control method Download PDF

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Publication number
WO2016045093A1
WO2016045093A1 PCT/CN2014/087566 CN2014087566W WO2016045093A1 WO 2016045093 A1 WO2016045093 A1 WO 2016045093A1 CN 2014087566 W CN2014087566 W CN 2014087566W WO 2016045093 A1 WO2016045093 A1 WO 2016045093A1
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Prior art keywords
circuit
current
value
current limiting
radio frequency
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PCT/CN2014/087566
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French (fr)
Chinese (zh)
Inventor
田丰
郭智
董峰
杨帆
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华为技术有限公司
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Priority to PCT/CN2014/087566 priority Critical patent/WO2016045093A1/en
Publication of WO2016045093A1 publication Critical patent/WO2016045093A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a wireless internet terminal, a current limiting control device, and a current limiting control method.
  • a PC personal computer
  • a wireless Internet terminal such as a notebook computer, a pad, a tablet computer, etc.
  • a USB wireless Internet terminal is plug and play, providing a convenient and fast wireless Internet access experience for the user.
  • the power supply of the wireless internet terminal is provided by the USB interface of the PC to provide a standard voltage of 5V. Since the design of USB power supply capability is different for each PC manufacturer, the maximum current value that can be supplied is different. If the current demand of the wireless Internet terminal exceeds the power supply capability of the PC connected to it in some usage scenarios, the PC may crash due to the inability to load, and the wireless Internet terminal cannot cooperate with it.
  • the prior art adds a current limiting protection to the circuit design of the wireless internet terminal, and sets the current limiting value of the wireless internet terminal through the current limiting chip or the power management chip.
  • the current of the wireless internet terminal does not exceed the current limit value, thereby protecting the normal operation of the PC.
  • the current limit value is preset and cannot be automatically adjusted according to the power supply capability of the PC.
  • the current limit setting of the wireless Internet terminal is greater than the power supply capability of the PC, since the current does not reach the demand of the wireless Internet terminal, the power supply voltage of the wireless Internet terminal may fall due to abnormal operation, or the USB output protection of the PC may be directly disconnected.
  • the terminal In the case of power supply; when the current limit value of the wireless internet terminal is less than the USB current limit value of the PC end or the upper limit of the output capability is not reached, the terminal cannot fully utilize the power that the PC can provide.
  • the wireless internet terminal in the prior art has a technical problem that the current limit value cannot be adjusted according to the power supply capability of the PC.
  • the embodiments of the present invention provide a wireless network access terminal, a current limiting control device, and a current limiting control method, to solve the technical problem that the current limiting value cannot be adjusted according to the power supply capability of the PC in the prior art.
  • an embodiment of the present invention provides a wireless internet terminal, including:
  • a current limiting control circuit for limiting the operating current of the wireless internet terminal
  • a detection circuit connected to the output end of the current limiting control circuit for detecting a voltage value at an output end of the current limiting control circuit
  • a DC voltage conversion circuit connected to the output end of the current limiting control circuit for converting and outputting a current voltage output by the current limiting control circuit
  • a radio frequency circuit connected to the output end of the DC voltage conversion circuit for transmitting and receiving signals when the wireless internet terminal is working normally;
  • a load circuit connected to an output end of the DC voltage conversion circuit for providing a load when the wireless network terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the RF circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • the processor is connected to one end of the current limiting control circuit, the detecting circuit, the DC voltage converting circuit, the load circuit and the RF circuit, respectively, when the wireless internet terminal is powered on, Turning off the RF circuit, turning on the load circuit, and controlling the current of the current limiting control circuit to gradually increase from the initial current value by a preset step value, and sequentially obtaining the voltage value detected by the detecting circuit; When the obtained voltage value falls to a preset threshold value, obtaining a current value currently provided by the current limiting control circuit as a current limiting value, and limiting, by the current limiting control circuit, an operating current value of the wireless internet terminal Less than or equal to the current limit value.
  • the processor is further configured to:
  • the detecting circuit specifically includes:
  • At least two series resistors wherein one end of the first one of the at least two series resistors is connected to an output of the current limiting control circuit, the other end of the first resistor and the at least two series resistors One end of the second resistor is connected, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor is connected to one end of the second resistor, and the voltage value on the second resistor is The analog to digital conversion interface operates within a range of operating levels.
  • the preset threshold value is specifically 4.75v.
  • the initial current value is specifically a minimum current value of the wireless internet terminal when operating at a baseband .
  • the embodiment of the present invention provides a current limiting control method for a wireless internet terminal, where the wireless internet terminal includes a current limiting control circuit, a detecting circuit, and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both The outputs of the current limiting control circuit are connected, and the method includes:
  • a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or
  • the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • the method further includes:
  • the preset threshold value is specifically 4.75v.
  • an embodiment of the present invention provides a current limiting control device for a wireless internet terminal, where the wireless internet terminal includes a current limiting control circuit, a detecting circuit, and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both configured to limit current
  • the outputs of the control circuit are connected, and the device comprises:
  • a switch control unit configured to turn off the radio frequency circuit and turn on the load circuit when the wireless internet terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the radio frequency circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • control unit configured to: when the wireless network terminal is powered on, when the current for controlling the current limiting control circuit is gradually increased from the initial current value by a preset step value, the detection circuit sequentially obtains The voltage value;
  • a current limiting value obtaining unit configured to obtain a current value currently provided by the current limiting control circuit as a current limiting value when the voltage value obtained by the control unit falls to a preset threshold value
  • the control unit is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  • the method further includes: a radio frequency power obtaining unit, configured to obtain the radio frequency after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit The maximum RF power of the circuit when operating in a current range less than or equal to the current limit value;
  • the switch control unit is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to a power that does not exceed the maximum radio frequency power.
  • the preset threshold is specifically 4.75v.
  • the processor By setting a detection circuit and a load circuit at the output end of the current limiting control circuit of the wireless internet terminal, when the wireless power terminal is powered on, the processor starts the load circuit to simulate the load of the wireless circuit of the wireless internet terminal, and gradually increases the current limiting control.
  • the current of the circuit corresponds to the voltage at the output of the current limiting control circuit to detect the power supply capability of the interface provided by the PC.
  • the voltage at the output of the current limiting control circuit falls to a preset threshold, the current corresponding to the current limiting control circuit is obtained.
  • the value is the current supply current of the currently connected PC as the current limit value of the current limiting control circuit, thereby solving the technical problem that the wireless internet terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC, and improves the wireless Internet access. Terminal utilization of power.
  • FIG. 1 is a schematic circuit diagram of a wireless internet terminal according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a detection circuit according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic diagram of a load circuit according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a current limiting control method according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a current limiting control apparatus according to Embodiment 3 of the present invention.
  • the embodiment of the present invention provides a wireless internet terminal, a current limiting control device, and a current limiting control method.
  • an embodiment of the present application provides a wireless internet terminal, including:
  • the current limiting control circuit 11 is configured to provide a working current for the wireless internet terminal and limit the working current of the wireless internet terminal;
  • the detecting circuit 12 is connected to the output end of the current limiting control circuit 11 for detecting the voltage value of the output end of the current limiting control circuit;
  • the DC voltage conversion circuit 13 is connected to the output end of the current limiting control circuit 11 for converting and outputting the current voltage output by the current limiting control circuit 11;
  • the RF circuit 14 is connected to the output end of the DC voltage conversion circuit 13 for transmitting and receiving signals when the wireless Internet terminal is working normally;
  • the load circuit 15 is connected to the output end of the DC voltage conversion circuit 13 for providing a load when the wireless network terminal is powered on; wherein the maximum load current value of the load circuit and the maximum operation of the RF circuit The current values are the same, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • the processor 16 is respectively connected to one ends of the current limiting control circuit 11, the detecting circuit 12, the DC voltage converting circuit 13, the load circuit 15, and the RF circuit 14 for use in the wireless Internet access
  • the RF circuit 14 is turned off, the load circuit 15 is turned on, and the current of the current limiting control circuit 11 is controlled to gradually increase from the initial current value according to the preset step value.
  • the voltage value detected by the detecting circuit 12 when the obtained voltage value falls to a preset threshold value, obtains a current value currently provided by the current limiting control circuit 11 as a current limiting value, and passes the current limiting
  • the control circuit 11 limits the operating current value of the wireless internet terminal to be less than or equal to the current limit value.
  • the wireless internet terminal provided by the embodiment of the present invention may specifically be a USB wireless internet terminal, and may be connected to a USB interface of the PC through a USB interface.
  • the USB interface of the PC end can generally provide a 5V constant voltage power supply to the wireless internet terminal within the range of its power supply capability.
  • one input of the current limiting control circuit 11 is connected to the processor 16, and the other input is wireless.
  • the USB interface of the Internet terminal is connected to connect with the USB of the PC, thereby limiting the working current of the wireless Internet terminal.
  • the current limiting control circuit 11 can be composed of a current limiting chip and a resistor array for limiting the working current of the wireless internet terminal, and avoiding that the working circuit of the wireless internet terminal is too large to exceed the power supply capability of the USB interface of the PC end and can not be loaded and crash.
  • the output of the current limiting control circuit 11 is connected to the input of the detecting circuit 12 and the input of the DC voltage converting circuit 13.
  • the detecting circuit 12 may include at least two series resistors, wherein one end of the first resistor of the at least two series resistors is connected to an output end of the current limiting control circuit 11, and the first resistor is further One end is connected to one end of the second one of the at least two series resistors, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor 16 is connected to one end of the second resistor, The voltage value divided on the second resistor is within the operating level range of the analog to digital conversion interface.
  • FIG. 2 is a detection circuit 12 including two resistors.
  • the first resistor 121 is connected in series with the second resistor 122.
  • One end 121a of the first resistor 121 is connected to the output end of the current limiting control circuit 11, the other end 122b of the second resistor 122 is grounded, and the one end 122a of the second resistor 122 is also connected to the processor.
  • the analog-to-digital conversion interface of 16 is connected, that is, the detection circuit 12 can be a voltage dividing circuit.
  • the working level range of the analog-to-digital conversion interface of the processor 16 may be lower than the voltage of the output terminal of the current limiting control circuit 11, so the voltage of the voltage detecting signal input to the analog-to-digital conversion interface by the voltage dividing circuit is used. Control is within the operating level range of the analog to digital conversion interface.
  • the detection circuit 12 can be equal to two resistance values.
  • the resistors are connected in series such that the voltage of one end 122a of the second resistor 122 is 2.25v to 2.48v, which is in accordance with the operation requirements of the analog-to-digital conversion interface of the processor 16.
  • the processor 16 can obtain the voltage of the output terminal of the current limiting control circuit 11 by Ohm's law calculation according to the voltage at the output of the detecting circuit 12. For example, if the voltage of the second resistor 122 in FIG. 2 is 2.4 volts, the voltage at the output of the current limiting control circuit 11 obtained by Ohm's law calculation is 4.8 volts.
  • the DC voltage conversion circuit 13 can specifically be a chip DC/DC (direct current to direct Current, DC voltage to DC voltage), used to convert the DC voltage provided at the output of the current limiting control circuit 11 into a DC voltage suitable for the operation of the RF circuit of the wireless Internet terminal, such as converting a fixed DC piezoelectric to a variable DC voltage.
  • DC/DC direct current to direct Current, DC voltage to DC voltage
  • the output of the DC voltage conversion circuit 13 is connected to the input of the RF circuit 14 and the input of the load circuit 15.
  • the load circuit 15 can be a fixed current load with a large current flow, such as a resistor with a large resistance value, wherein the maximum load current value of the load circuit 15 is the same as the maximum operating current value of the RF circuit, and is used to simulate the operation of the RF circuit 14. .
  • the load circuit 15 can also be a dynamic current load, simulating the dynamic power consumption of the RF circuit 14 operating timing. At this time, the impedance value of the load circuit 15 is the same as the impedance value of the RF circuit 14. The impedance value of the RF circuit 14 dynamically changes with the RF operation timing.
  • the impedance value of the load circuit 15 also dynamically changes according to the same timing, and the analog RF circuit 14 operates more accurately.
  • the embodiment of the present application provides a load instead of the radio frequency circuit 14 when the load circuit 15 is powered on, so that the changed current affects the stability of the operation of the radio frequency circuit 14 during the power-on detection.
  • FIG. 3 is an example of a circuit when the load circuit 15 is a dynamic current load.
  • the load circuit 15 includes n parallel resistors, n is an integer greater than or equal to 2, one end of each resistor is connected to the output end of the DC voltage conversion circuit 13, and the other end is grounded through a switch, and the control terminal of each switch and the processor 16 A GPIO (general purpose input output) interface is connected, and the processor 16 can control the on/off of the switch through the GPIO interface, thereby changing the load value of the load circuit and simulating the impedance value of the RF circuit 14.
  • GPIO general purpose input output
  • the processor 16 is connected to the input of the load circuit 15, the input of the RF circuit 14, the output of the detection circuit 12 (i.e., the end 122a of the second resistor) and the input of the current limiting control circuit 11, respectively.
  • the digital-to-analog conversion interface of the processor 16 is connected to the control end of the current limiting control circuit 11, and the processor 16 can output a current-limit value control signal through the digital-to-analog conversion interface to control the current limiting value of the current limiting control circuit 11.
  • the wireless internet terminal includes two working states: a power-on detection state and a normal working state.
  • the processor 16 performs the following steps:
  • Step 1 Turn off the RF circuit 14, turn on the load circuit 15, and start the baseband operation.
  • the baseband is a circuit other than the RF circuit 14 of the wireless Internet terminal.
  • Step 2 The processor 16 controls the current of the current limiting control circuit 11 to gradually increase from the initial current value by a preset step value by the current limit value control signal to detect the power supply capability of the PC end.
  • the initial current value may be the minimum current value of the wireless internet terminal when working at the baseband to ensure normal operation of the baseband.
  • Step 3 When the current of the control signal control current limiting control circuit 11 is gradually increased from the initial current value by the preset step value, the processor 16 sequentially obtains the voltage value detected by the detecting circuit 12.
  • the current of the current limiting control circuit 11 When the current of the current limiting control circuit 11 is gradually increased, the power consumption of the wireless internet terminal is gradually increased, and the power supply capability of the PC terminal is also higher and higher.
  • the power consumption of the wireless internet terminal exceeds the power supply capability of the PC, the current limiting A large voltage drop is generated at the output of the control circuit 11, and step 4 is continued for this purpose.
  • Step 4 When the voltage value detected by the detecting circuit 12 (ie, the voltage value at the output end of the current limiting control circuit 11) falls to a preset threshold value, the current value currently provided by the current limiting control circuit 11 is obtained as a time limit flow control circuit.
  • the current limiting value of 11 is limited, and the current limiting value of the wireless internet terminal is limited by the current limiting control circuit 11 to be less than or equal to the current limiting value.
  • the processor 16 can measure the data multiple times and perform an algorithmic processing to obtain a more accurate voltage value at the output of the current limiting control circuit 11.
  • the processor 16 may specifically output a current limit value control signal through the digital-to-analog conversion interface to control the current limit value of the current limiting control circuit 11.
  • the preset threshold may be specifically 4.75v.
  • the current currently provided by the current limiting control circuit 11 ie, the current of the wireless internet terminal
  • the current limiting control circuit 11 is set as the current limiting value of the current limiting control circuit 11, so that the current limiting value of the wireless internet terminal is not limited by the current limiting control circuit 11 to exceed the current limiting value.
  • the current limit value is adjusted according to the maximum power supply capacity of the PC, and the wireless network terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC.
  • the technical problem has improved the utilization of the power supply by the wireless internet terminal. Therefore, the wireless internet terminal provided by the embodiment of the present application can be applied to different power supply capabilities. On the PC side, ensure that the wireless Internet terminal can work with more PCs.
  • the wireless network terminal After the power-on detection is completed, the wireless network terminal obtains the current limit value of the adapted PC, turns off the load circuit 15, turns on the RF circuit 14, and enters a normal working state. Further, after obtaining the current value currently provided by the current limiting control circuit, the processor 16 may obtain the maximum RF power when the radio frequency circuit 14 operates in a current range less than or equal to the current limiting value; The load circuit 15 turns on the radio frequency circuit 14 and controls the radio frequency circuit 14 to transmit and receive signals according to the power of the maximum radio frequency, so that the current demand of the wireless internet terminal is matched with the power supply capability of the PC, and the wireless internet terminal is operated. Best performance.
  • the embodiment of the present application provides a current limiting control method, which is applied to the wireless Internet access terminal, where the wireless Internet access terminal includes a current limiting control circuit, a detection circuit, and a radio frequency. a circuit, the detection circuit and the radio frequency circuit are both connected to an output of the current limiting control circuit, the method comprising:
  • Step 401 Turn off the radio frequency circuit to turn on the load circuit when the wireless internet terminal is powered on, wherein a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or The impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • Step 402 When the current of the current limiting control circuit is gradually increased from the initial current value according to the preset step value, the voltage value of the output end of the current limiting control circuit detected by the detecting circuit is sequentially obtained;
  • Step 403 When the obtained voltage value falls to a preset threshold, obtaining a current value currently provided by the current limiting control circuit as a current limiting value;
  • Step 404 Limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  • the method further includes:
  • the preset threshold of the wireless internet terminal may specifically be 4.75v.
  • the wireless network terminal includes a current limiting control circuit, a detection circuit, and a radio frequency circuit, and the detection circuit and the radio frequency circuit are both connected to an output end of the current limiting control circuit, and the current limiting control device includes:
  • the switch control unit 51 is configured to: when the wireless internet terminal is powered on, turn off the radio frequency circuit, and turn on the load circuit; wherein a maximum load current value of the load circuit and a maximum operating current of the radio frequency circuit The values are the same, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
  • control unit 52 configured to control, when the current of the current limiting control circuit is gradually increased from the initial current value by a preset step value, sequentially obtaining the voltage value of the output end of the current limiting control circuit detected by the detecting circuit ;
  • the current limit value obtaining unit 53 is configured to obtain, as the current limit value, a current value currently provided by the current limiting control circuit when the voltage value obtained by the control unit falls to a preset threshold value;
  • the control unit 52 is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  • the current limiting control apparatus provided by the embodiment of the present application further includes a radio frequency power obtaining unit, configured to obtain the current value after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit.
  • a radio frequency power obtaining unit configured to obtain the current value after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit.
  • the switch control unit 51 is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to the maximum radio frequency.
  • the preset threshold of the wireless internet terminal may specifically be 4.75v.
  • the processor By setting a detection circuit and a load circuit at the output end of the current limiting control circuit of the wireless internet terminal, when the wireless power terminal is powered on, the processor starts the load circuit to simulate the load of the wireless circuit of the wireless internet terminal, and gradually increases the current limiting control.
  • the current of the circuit corresponds to the voltage at the output of the current limiting control circuit to detect the power supply capability of the interface provided by the PC.
  • the voltage at the output of the current limiting control circuit falls to a preset threshold, the current corresponding to the current limiting control circuit is obtained.
  • the value is the current supply current of the currently connected PC as the current limit value of the current limiting control circuit, thereby solving the technical problem that the wireless internet terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC, and improves the wireless Internet access. Terminal utilization of power.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

Provided are a wireless internet access terminal, a current limiting control apparatus and a current limiting control method. The wireless internet access terminal comprises a current limiting control circuit, a detection circuit, a direct-current voltage conversion circuit, a radio frequency circuit, a load circuit and a processor, wherein a maximum load current value of the load circuit is identical to a maximum working current value of the radio frequency circuit, or a resistance value of the load circuit is identical to a resistance value of the radio frequency circuit; the processor is used for closing the radio frequency circuit and opening the load circuit when the wireless internet access terminal is powered on to be detected, controlling the current of the current limiting control circuit to be gradually increased from an initial current value according to a pre-set step value, and sequentially obtaining a voltage value detected by the detection circuit; and when the obtained voltage value is decreased to a pre-set threshold value, the current value currently provided by the current limiting control circuit is used as a current limiting value. By means of the technical solution, the technical problem in the prior art that the wireless internet access terminal cannot adjust the current limiting value according to the power supply capacity of a PC is solved.

Description

一种无线上网终端、限流控制装置及限流控制方法Wireless internet terminal, current limiting control device and current limiting control method 技术领域Technical field
本发明实施例涉及通信技术领域，特别涉及一种无线上网终端、限流控制装置及限流控制方法。The embodiments of the present invention relate to the field of communications technologies, and in particular, to a wireless internet terminal, a current limiting control device, and a current limiting control method.
背景技术Background technique
在通信技术中，笔记本电脑、pad、平板电脑等PC(personal computer，个人计算机)配合无线上网终端使用，特别是USB无线上网终端即插即用，为用户提供方便快捷的无线上网体验。In the communication technology, a PC (personal computer) such as a notebook computer, a pad, a tablet computer, etc. is used in conjunction with a wireless Internet terminal, and in particular, a USB wireless Internet terminal is plug and play, providing a convenient and fast wireless Internet access experience for the user.
现有技术中，由于无线上网终端的供电由PC的USB接口提供5V标准电压。由于各个PC厂家对于USB供电能力的设计是不同的，即可提供的最大电流值不相同。如果某些使用场景下，无线上网终端的电流需求超过了与其连接的PC的供电能力，可能会导致该PC因无法负荷而死机，无线上网终端也因此无法与其配合使用。In the prior art, the power supply of the wireless internet terminal is provided by the USB interface of the PC to provide a standard voltage of 5V. Since the design of USB power supply capability is different for each PC manufacturer, the maximum current value that can be supplied is different. If the current demand of the wireless Internet terminal exceeds the power supply capability of the PC connected to it in some usage scenarios, the PC may crash due to the inability to load, and the wireless Internet terminal cannot cooperate with it.
为了解决无线上网终端导致PC因无法负荷而死机的技术问题，现有技术在无线上网终端的电路设计上加入了限流保护，通过限流芯片或者电源管理芯片设置无线上网终端的限流值，使得无线上网终端的电流不超过限流值，从而保护PC正常工作。In order to solve the technical problem that the wireless internet terminal causes the PC to crash due to the unloading, the prior art adds a current limiting protection to the circuit design of the wireless internet terminal, and sets the current limiting value of the wireless internet terminal through the current limiting chip or the power management chip. The current of the wireless internet terminal does not exceed the current limit value, thereby protecting the normal operation of the PC.
然而，限流值是预先设定的，不能根据PC的供电能力自动调节。当无线上网终端的限流值设置大于PC供电能力时，由于电流达不到无线上网终端的需求，会出现无线上网终端的电源电压跌落导致工作异常，或者会出现PC端的USB输出保护直接断开供电的情况；当无线上网终端的限流值小于PC端的USB限流值或者没有达到其输出能力上限时，则终端无法能充分使用PC可以提供的电能。However, the current limit value is preset and cannot be automatically adjusted according to the power supply capability of the PC. When the current limit setting of the wireless Internet terminal is greater than the power supply capability of the PC, since the current does not reach the demand of the wireless Internet terminal, the power supply voltage of the wireless Internet terminal may fall due to abnormal operation, or the USB output protection of the PC may be directly disconnected. In the case of power supply; when the current limit value of the wireless internet terminal is less than the USB current limit value of the PC end or the upper limit of the output capability is not reached, the terminal cannot fully utilize the power that the PC can provide.
可见，现有技术中的无线上网终端存在无法根据PC的供电能力调节限流值的技术问题。 It can be seen that the wireless internet terminal in the prior art has a technical problem that the current limit value cannot be adjusted according to the power supply capability of the PC.
发明内容Summary of the invention
本发明实施例提供一种无线上网终端、限流控制装置及限流控制方法，以解决现有技术中存在的无法根据PC的供电能力调节限流值的技术问题。The embodiments of the present invention provide a wireless network access terminal, a current limiting control device, and a current limiting control method, to solve the technical problem that the current limiting value cannot be adjusted according to the power supply capability of the PC in the prior art.
第一方面，本发明实施例提供一种无线上网终端，包括：In a first aspect, an embodiment of the present invention provides a wireless internet terminal, including:
限流控制电路，用于限制无线上网终端工作电流的大小；a current limiting control circuit for limiting the operating current of the wireless internet terminal;
检测电路，与所述限流控制电路的输出端相连，用于检测所述限流控制电路的输出端的电压值；a detection circuit connected to the output end of the current limiting control circuit for detecting a voltage value at an output end of the current limiting control circuit;
直流电压转换电路，与所述限流控制电路的输出端相连，用于转换并输出所述限流控制电路输出的电流电压；a DC voltage conversion circuit connected to the output end of the current limiting control circuit for converting and outputting a current voltage output by the current limiting control circuit;
射频电路，与所述直流电压转换电路的输出端相连，用于在所述无线上网终端正常工作时收发信号；a radio frequency circuit connected to the output end of the DC voltage conversion circuit for transmitting and receiving signals when the wireless internet terminal is working normally;
负载电路，与述直流电压转换电路的输出端相连，用于在所述无线上网终端上电检测时提供负载；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；a load circuit connected to an output end of the DC voltage conversion circuit for providing a load when the wireless network terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the RF circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
处理器，分别与所述限流控制电路、所述检测电路、所述直流电压转换电路、所述负载电路及所述射频电路的一端相连，用于在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路，并控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大，依次获得所述检测电路检测到的所述电压值；当获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值，通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。The processor is connected to one end of the current limiting control circuit, the detecting circuit, the DC voltage converting circuit, the load circuit and the RF circuit, respectively, when the wireless internet terminal is powered on, Turning off the RF circuit, turning on the load circuit, and controlling the current of the current limiting control circuit to gradually increase from the initial current value by a preset step value, and sequentially obtaining the voltage value detected by the detecting circuit; When the obtained voltage value falls to a preset threshold value, obtaining a current value currently provided by the current limiting control circuit as a current limiting value, and limiting, by the current limiting control circuit, an operating current value of the wireless internet terminal Less than or equal to the current limit value.
结合第一方面，在第一种可能实施的方式中，所述处理器还用于：In combination with the first aspect, in a first possible implementation manner, the processor is further configured to:
在所述获得所述限流控制电路当前提供的电流值之后，获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射频功率；After obtaining the current value currently provided by the current limiting control circuit, obtaining a maximum radio frequency power when the radio frequency circuit operates in a current range less than or equal to the current limiting value;
关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所 述最大射频功率的功率收发信号。Turning off the load circuit, turning on the radio frequency circuit, and controlling the radio frequency circuit to not exceed The power transmission and reception signal of the maximum RF power.
结合第一方面或第一种可能实施的方式，在第二种可能实施的方式中，所述检测电路具体包括：In combination with the first aspect or the first possible implementation manner, in a second possible implementation manner, the detecting circuit specifically includes:
至少两个串联电阻，其中，所述至少两个串联电阻中的第一电阻的一端与所述限流控制电路的输出端相连，所述第一电阻的另一端与所述至少两个串联电阻中的第二电阻的一端相连，所述第二电阻的另一端接地，所述处理器的模数转换接口与所述第二电阻的一端相连，所述第二电阻上分得的电压值在所述模数转换接口的工作电平范围内。At least two series resistors, wherein one end of the first one of the at least two series resistors is connected to an output of the current limiting control circuit, the other end of the first resistor and the at least two series resistors One end of the second resistor is connected, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor is connected to one end of the second resistor, and the voltage value on the second resistor is The analog to digital conversion interface operates within a range of operating levels.
结合第一方面、第一种可能实施的方式或第二种可能实施的方式，在第三种可能实施的方式中，所述预设门限值具体为4.75v。With reference to the first aspect, the first possible implementation manner, or the second possible implementation manner, in a third possible implementation manner, the preset threshold value is specifically 4.75v.
结合第一方面或第一种至第三种中任一可能实施的方式，在第四种可能实施的方式中，所述初始电流值具体为所述无线上网终端在基带工作时的最小电流值。With reference to the first aspect or any one of the first to the third possible implementation manners, in a fourth possible implementation manner, the initial current value is specifically a minimum current value of the wireless internet terminal when operating at a baseband .
第二方面，本发明实施例提供一种无线上网终端的限流控制方法，所述无线上网终端包含限流控制电路、检测电路及射频电路，所述检测电路和所述射频电路均与所述限流控制电路的输出端相连，所述方法包括：In a second aspect, the embodiment of the present invention provides a current limiting control method for a wireless internet terminal, where the wireless internet terminal includes a current limiting control circuit, a detecting circuit, and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both The outputs of the current limiting control circuit are connected, and the method includes:
在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；Turning off the radio frequency circuit to turn on the load circuit when the wireless internet terminal is powered on; wherein a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or The impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路检测到的所述限流控制电路的输出端的电压值；When the current of the current limiting control circuit is gradually increased from the initial current value by a preset step value, the voltage value of the output end of the current limiting control circuit detected by the detecting circuit is sequentially obtained;
当获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值；When the obtained voltage value falls to a preset threshold, obtaining a current value currently provided by the current limiting control circuit as a current limit value;
通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。And limiting, by the current limiting control circuit, an operating current value of the wireless internet terminal that is less than or equal to the current limiting value.
结合第二方面，在第一种可能实施的方式中，在获得所述限流控制电路当前提供的电流值之后，所述方法还包括： With reference to the second aspect, in a first possible implementation manner, after obtaining the current value currently provided by the current limiting control circuit, the method further includes:
获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射频功率；Obtaining a maximum radio frequency power when the radio frequency circuit operates in a current range less than or equal to the current limit value;
关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率的功率收发信号。Turning off the load circuit, turning on the radio frequency circuit, and controlling the radio frequency circuit to transmit and receive signals according to power that does not exceed the maximum radio frequency power.
结合第二方面或第一种可能实施的方式，在第二种可能实施的方式中，所述预设门限值具体为4.75v。With reference to the second aspect or the first possible implementation manner, in a second possible implementation manner, the preset threshold value is specifically 4.75v.
第三方面，本发明实施例提供一种无线上网终端的限流控制装置，无线上网终端包含限流控制电路、检测电路及射频电路，所述检测电路和所述射频电路均与所述限流控制电路的输出端相连，所述装置包括：In a third aspect, an embodiment of the present invention provides a current limiting control device for a wireless internet terminal, where the wireless internet terminal includes a current limiting control circuit, a detecting circuit, and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both configured to limit current The outputs of the control circuit are connected, and the device comprises:
开关控制单元，用于在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；a switch control unit, configured to turn off the radio frequency circuit and turn on the load circuit when the wireless internet terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the radio frequency circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
控制单元，用于在所述无线上网终端上电检测时，用于控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路检测到的所述电压值；a control unit, configured to: when the wireless network terminal is powered on, when the current for controlling the current limiting control circuit is gradually increased from the initial current value by a preset step value, the detection circuit sequentially obtains The voltage value;
限流值获取单元，用于当所述控制单元获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值；a current limiting value obtaining unit, configured to obtain a current value currently provided by the current limiting control circuit as a current limiting value when the voltage value obtained by the control unit falls to a preset threshold value;
所述控制单元，还用于通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。The control unit is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
结合第三方面，在第一种可能实施的方式中，还包括射频功率获得单元，用于在所述限流值获取单元获得所述限流控制电路当前提供的电流值之后，获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射频功率；With reference to the third aspect, in a first possible implementation, the method further includes: a radio frequency power obtaining unit, configured to obtain the radio frequency after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit The maximum RF power of the circuit when operating in a current range less than or equal to the current limit value;
所述开关控制单元，还用于关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率的功率收发信号。The switch control unit is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to a power that does not exceed the maximum radio frequency power.
结合第三方面或第一种可能实施的方式，在第二种可能实施的方式中， 所述预设门限值具体为4.75v。In conjunction with the third aspect or the first possible implementation, in a second possible implementation manner, The preset threshold is specifically 4.75v.
本申请实施例中的技术方案，至少具有如下技术效果：The technical solution in the embodiment of the present application has at least the following technical effects:
通过在无线上网终端的限流控制电路输出端设置一检测电路及负载电路，处理器在无线上网终端上电时，开启负载电路模拟无线上网终端的射频电路工作时的负载，逐步增加限流控制电路的电流，并对应检测限流控制电路输出端的电压，以检测PC提供电源的接口的供电能力，当限流控制电路输出端的电压降至预设门限值时，获得限流控制电路对应的电流值即当前接入的PC的最大供电电流作为限流控制电路的限流值，从而解决了现有技术中无线上网终端存在无法根据PC的供电能力调节限流值的技术问题，提高了无线上网终端对电源的利用率。By setting a detection circuit and a load circuit at the output end of the current limiting control circuit of the wireless internet terminal, when the wireless power terminal is powered on, the processor starts the load circuit to simulate the load of the wireless circuit of the wireless internet terminal, and gradually increases the current limiting control. The current of the circuit corresponds to the voltage at the output of the current limiting control circuit to detect the power supply capability of the interface provided by the PC. When the voltage at the output of the current limiting control circuit falls to a preset threshold, the current corresponding to the current limiting control circuit is obtained. The value is the current supply current of the currently connected PC as the current limit value of the current limiting control circuit, thereby solving the technical problem that the wireless internet terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC, and improves the wireless Internet access. Terminal utilization of power.
附图说明DRAWINGS
图1为本发明实施例一提供的一种无线上网终端的电路示意图；FIG. 1 is a schematic circuit diagram of a wireless internet terminal according to Embodiment 1 of the present invention;
图2为本发明实施例一提供的检测电路示意图；2 is a schematic diagram of a detection circuit according to Embodiment 1 of the present invention;
图3为本发明实施例一提供的负载电路示意图；3 is a schematic diagram of a load circuit according to Embodiment 1 of the present invention;
图4为本发明实施例二提供的一种限流控制方法的流程示意图；4 is a schematic flowchart of a current limiting control method according to Embodiment 2 of the present invention;
图5为本发明实施例三提供的一种限流控制装置的结构示意图。FIG. 5 is a schematic structural diagram of a current limiting control apparatus according to Embodiment 3 of the present invention.
具体实施方式detailed description
为了解决现有技术中出现的无法根据PC的供电能力调节限流值的技术问题，本发明实施例提出了一种无线上网终端、限流控制装置及限流控制方法。In order to solve the technical problem in the prior art that the current limit value cannot be adjusted according to the power supply capability of the PC, the embodiment of the present invention provides a wireless internet terminal, a current limiting control device, and a current limiting control method.
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。 The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
下面结合附图对本发明优选的实施方式进行详细说明。Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
实施例一Embodiment 1
请参考图1，本申请实施例提供一种无线上网终端，包括：Referring to FIG. 1 , an embodiment of the present application provides a wireless internet terminal, including:
限流控制电路11，用于为无线上网终端提供工作电流，并限制无线上网终端工作电流的大小；The current limiting control circuit 11 is configured to provide a working current for the wireless internet terminal and limit the working current of the wireless internet terminal;
检测电路12，与所述限流控制电路11的输出端相连，用于检测所述限流控制电路的输出端的电压值；The detecting circuit 12 is connected to the output end of the current limiting control circuit 11 for detecting the voltage value of the output end of the current limiting control circuit;
直流电压转换电路13，与所述限流控制电路11的输出端相连，用于转换并输出所述限流控制电路11输出的电流电压；The DC voltage conversion circuit 13 is connected to the output end of the current limiting control circuit 11 for converting and outputting the current voltage output by the current limiting control circuit 11;
射频电路14，与所述直流电压转换电路13的输出端相连，用于在所述无线上网终端正常工作时收发信号；The RF circuit 14 is connected to the output end of the DC voltage conversion circuit 13 for transmitting and receiving signals when the wireless Internet terminal is working normally;
负载电路15，与述直流电压转换电路13的输出端相连，用于在所述无线上网终端上电检测时提供负载；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；The load circuit 15 is connected to the output end of the DC voltage conversion circuit 13 for providing a load when the wireless network terminal is powered on; wherein the maximum load current value of the load circuit and the maximum operation of the RF circuit The current values are the same, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
处理器16，分别与所述限流控制电路11、所述检测电路12、所述直流电压转换电路13、所述负载电路15及所述射频电路14的一端相连，用于在所述无线上网终端上电检测时，关闭所述射频电路14，开启所述负载电路15，并控制所述限流控制电路11的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路12检测到的所述电压值，当获得的所述电压值降至预设门限值时，获得所述限流控制电路11当前提供的电流值作为限流值，通过所述限流控制电路11限制所述无线上网终端的工作电流值小于等于所述限流值。The processor 16 is respectively connected to one ends of the current limiting control circuit 11, the detecting circuit 12, the DC voltage converting circuit 13, the load circuit 15, and the RF circuit 14 for use in the wireless Internet access When the terminal is powered on, the RF circuit 14 is turned off, the load circuit 15 is turned on, and the current of the current limiting control circuit 11 is controlled to gradually increase from the initial current value according to the preset step value. The voltage value detected by the detecting circuit 12, when the obtained voltage value falls to a preset threshold value, obtains a current value currently provided by the current limiting control circuit 11 as a current limiting value, and passes the current limiting The control circuit 11 limits the operating current value of the wireless internet terminal to be less than or equal to the current limit value.
本申请实施例提供的无线上网终端具体可以是USB无线上网终端，可以通过USB接口与PC端的USB接口相连。其中，PC端的USB接口通常可以在其供电能力范围内给无线上网终端提供5V的恒压电源。在USB无线上网终端中，限流控制电路11的一输入端与处理器16相连、另一输入端与无线 上网终端的USB接口相连，从而与PC端的USB相连，进而限制无线上网终端工作电流的大小。限流控制电路11可以由限流芯片和电阻阵列组成，用于限制无线上网终端工作电流的大小，避免无线上网终端工作电路过大超出PC端USB接口的供电能力无法负荷而死机。The wireless internet terminal provided by the embodiment of the present invention may specifically be a USB wireless internet terminal, and may be connected to a USB interface of the PC through a USB interface. Among them, the USB interface of the PC end can generally provide a 5V constant voltage power supply to the wireless internet terminal within the range of its power supply capability. In the USB wireless internet terminal, one input of the current limiting control circuit 11 is connected to the processor 16, and the other input is wireless. The USB interface of the Internet terminal is connected to connect with the USB of the PC, thereby limiting the working current of the wireless Internet terminal. The current limiting control circuit 11 can be composed of a current limiting chip and a resistor array for limiting the working current of the wireless internet terminal, and avoiding that the working circuit of the wireless internet terminal is too large to exceed the power supply capability of the USB interface of the PC end and can not be loaded and crash.
限流控制电路11的输出端与检测电路12的输入端和直流电压转换电路13的输入端相连。具体的，检测电路12可以包含至少两个串联电阻，其中，所述至少两个串联电阻中的第一电阻的一端与所述限流控制电路11的输出端相连，所述第一电阻的另一端与所述至少两个串联电阻中的第二电阻的一端相连，所述第二电阻的另一端接地，所述处理器16的模数转换接口与所述第二电阻的一端相连，所述第二电阻上分得的电压值在所述模数转换接口的工作电平范围内。The output of the current limiting control circuit 11 is connected to the input of the detecting circuit 12 and the input of the DC voltage converting circuit 13. Specifically, the detecting circuit 12 may include at least two series resistors, wherein one end of the first resistor of the at least two series resistors is connected to an output end of the current limiting control circuit 11, and the first resistor is further One end is connected to one end of the second one of the at least two series resistors, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor 16 is connected to one end of the second resistor, The voltage value divided on the second resistor is within the operating level range of the analog to digital conversion interface.
请参考图2，图2为包含两个电阻的检测电路12。第一电阻121与第二电阻122串联，第一电阻121的一端121a与限流控制电路11的输出端相连，第二电阻122的另一端122b接地，第二电阻122的一端122a还与处理器16的模数转换接口相连，即检测电路12可以为分压电路。在实际工作过程中处理器16的模数转换接口的工作电平范围可能低于限流控制电路11输出端的电压，因此采用分压电路将检测电路输入到模数转换接口的电压检测信号的电压控制在模数转换接口的工作电平范围内。Please refer to FIG. 2. FIG. 2 is a detection circuit 12 including two resistors. The first resistor 121 is connected in series with the second resistor 122. One end 121a of the first resistor 121 is connected to the output end of the current limiting control circuit 11, the other end 122b of the second resistor 122 is grounded, and the one end 122a of the second resistor 122 is also connected to the processor. The analog-to-digital conversion interface of 16 is connected, that is, the detection circuit 12 can be a voltage dividing circuit. In the actual working process, the working level range of the analog-to-digital conversion interface of the processor 16 may be lower than the voltage of the output terminal of the current limiting control circuit 11, so the voltage of the voltage detecting signal input to the analog-to-digital conversion interface by the voltage dividing circuit is used. Control is within the operating level range of the analog to digital conversion interface.
例如，假设处理器16的模数转换接口的工作电平范围为2.2v～3.0v，限流控制电路11的输出端的电压为4.5v～4.96v，那么检测电路12可以由两个电阻值相等的电阻串联而成，使得第二电阻122的一端122a的电压为2.25v～2.48v，符合处理器16的模数转换接口的工作要求。For example, assuming that the operating level range of the analog-to-digital conversion interface of the processor 16 is 2.2v to 3.0v, and the voltage of the output terminal of the current limiting control circuit 11 is 4.5v to 4.96v, the detection circuit 12 can be equal to two resistance values. The resistors are connected in series such that the voltage of one end 122a of the second resistor 122 is 2.25v to 2.48v, which is in accordance with the operation requirements of the analog-to-digital conversion interface of the processor 16.
当检测电路12为分压电路时，处理器16可以根据检测电路12输出端的电压，通过欧姆定律计算获得限流控制电路11的输出端的电压。例如，若图2中第二电阻122的电压为2.4v，那么通过欧姆定律计算获得限流控制电路11的输出端的电压为4.8v。When the detecting circuit 12 is a voltage dividing circuit, the processor 16 can obtain the voltage of the output terminal of the current limiting control circuit 11 by Ohm's law calculation according to the voltage at the output of the detecting circuit 12. For example, if the voltage of the second resistor 122 in FIG. 2 is 2.4 volts, the voltage at the output of the current limiting control circuit 11 obtained by Ohm's law calculation is 4.8 volts.
直流电压转换电路13具体可以为芯片DC/DC(direct current to direct  current，直流电压转直流电压)，用于将限流控制电路11的输出端提供的直流电压转换为适合无线上网终端的射频电路工作要求的直流电压，如将固定的直流压电转换为可变的直流电压。The DC voltage conversion circuit 13 can specifically be a chip DC/DC (direct current to direct Current, DC voltage to DC voltage), used to convert the DC voltage provided at the output of the current limiting control circuit 11 into a DC voltage suitable for the operation of the RF circuit of the wireless Internet terminal, such as converting a fixed DC piezoelectric to a variable DC voltage.
直流电压转换电路13的输出端与射频电路14的输入端和负载电路15的输入端相连。负载电路15可以为通流较大的的固定电流负载，如一个较大阻值的电阻，其中负载电路15的最大负载电流值与射频电路的最大工作电流值相同，用于模拟射频电路14工作。进一步的，负载电路15也可以为动态电流负载，模拟射频电路14工作时序的动态功耗，此时，负载电路15的阻抗值与射频电路14的阻抗值相同。射频电路14的阻抗值随射频工作时序动态变化，相应的，负载电路15的阻抗值也按相同的时序动态变化，更为准确的模拟射频电路14工作。本申请实施例通过负载电路15在上电检测时替代射频电路14提供负载，避免在上电检测时，变化的电流影响射频电路14工作的稳定性。The output of the DC voltage conversion circuit 13 is connected to the input of the RF circuit 14 and the input of the load circuit 15. The load circuit 15 can be a fixed current load with a large current flow, such as a resistor with a large resistance value, wherein the maximum load current value of the load circuit 15 is the same as the maximum operating current value of the RF circuit, and is used to simulate the operation of the RF circuit 14. . Further, the load circuit 15 can also be a dynamic current load, simulating the dynamic power consumption of the RF circuit 14 operating timing. At this time, the impedance value of the load circuit 15 is the same as the impedance value of the RF circuit 14. The impedance value of the RF circuit 14 dynamically changes with the RF operation timing. Correspondingly, the impedance value of the load circuit 15 also dynamically changes according to the same timing, and the analog RF circuit 14 operates more accurately. The embodiment of the present application provides a load instead of the radio frequency circuit 14 when the load circuit 15 is powered on, so that the changed current affects the stability of the operation of the radio frequency circuit 14 during the power-on detection.
请参考图3，图3为负载电路15为动态电流负载时的电路示例。负载电路15包含n个并联电阻，n为大于等于2的整数，每个电阻的一端与直流电压转换电路13的输出端相连，另一端通过一个开关接地，每个开关的控制端与处理器16的一个GPIO(general purpose input output，通用输入/输出)接口相连，处理器16可以通过GPIO接口控制开关的通断，从而改变负载电路的负载值，模拟射频电路14阻抗值。Please refer to FIG. 3. FIG. 3 is an example of a circuit when the load circuit 15 is a dynamic current load. The load circuit 15 includes n parallel resistors, n is an integer greater than or equal to 2, one end of each resistor is connected to the output end of the DC voltage conversion circuit 13, and the other end is grounded through a switch, and the control terminal of each switch and the processor 16 A GPIO (general purpose input output) interface is connected, and the processor 16 can control the on/off of the switch through the GPIO interface, thereby changing the load value of the load circuit and simulating the impedance value of the RF circuit 14.
处理器16分别与负载电路15的输入端、射频电路14的输入端、检测电路12的输出端(即第二电阻的一端122a)及限流控制电路11的输入端相连。其中，处理器16的数模转换接口与限流控制电路11的控制端相连，处理器16可以通过数模转换接口输出限流值控制信号，以控制限流控制电路11的限流值。The processor 16 is connected to the input of the load circuit 15, the input of the RF circuit 14, the output of the detection circuit 12 (i.e., the end 122a of the second resistor) and the input of the current limiting control circuit 11, respectively. The digital-to-analog conversion interface of the processor 16 is connected to the control end of the current limiting control circuit 11, and the processor 16 can output a current-limit value control signal through the digital-to-analog conversion interface to control the current limiting value of the current limiting control circuit 11.
在具体实施过程中，无线上网终端包含两个工作状态：上电检测状态和正常工作状态。In the specific implementation process, the wireless internet terminal includes two working states: a power-on detection state and a normal working state.
无线上网终端上电初始即刚接入PC端时，无线上网终端进入上电检测状 态，处理器16执行如下步骤：When the wireless Internet terminal is powered on, it is just connected to the PC, and the wireless Internet terminal enters the power-on detection state. The processor 16 performs the following steps:
步骤一：关闭射频电路14，开启负载电路15，基带开始工作，其中基带为无线上网终端除射频电路14以外的其他电路。Step 1: Turn off the RF circuit 14, turn on the load circuit 15, and start the baseband operation. The baseband is a circuit other than the RF circuit 14 of the wireless Internet terminal.
步骤二：处理器16通过限流值控制信号控制限流控制电路11的电流从初始电流值按预设步长值逐步增大，以检测PC端的供电能力。其中，初始电流值可以为无线上网终端在基带工作时的最小电流值，以保证基带正常工作。Step 2: The processor 16 controls the current of the current limiting control circuit 11 to gradually increase from the initial current value by a preset step value by the current limit value control signal to detect the power supply capability of the PC end. The initial current value may be the minimum current value of the wireless internet terminal when working at the baseband to ensure normal operation of the baseband.
步骤三：在控制信号控制限流控制电路11的电流从初始电流值按预设步长值逐步增大时，处理器16依次获得检测电路12检测到的电压值。当限流控制电路11的电流逐步增大时，无线上网终端的功耗逐步增大，对PC端的供电能力要求也越来越高，当无线上网终端的功耗超出PC端的供电能力时，限流控制电路11的输出端就会产生较大的压降，为此继续执行步骤四。Step 3: When the current of the control signal control current limiting control circuit 11 is gradually increased from the initial current value by the preset step value, the processor 16 sequentially obtains the voltage value detected by the detecting circuit 12. When the current of the current limiting control circuit 11 is gradually increased, the power consumption of the wireless internet terminal is gradually increased, and the power supply capability of the PC terminal is also higher and higher. When the power consumption of the wireless internet terminal exceeds the power supply capability of the PC, the current limiting A large voltage drop is generated at the output of the control circuit 11, and step 4 is continued for this purpose.
步骤四：当检测电路12检测到的电压值(即限流控制电路11输出端的电压值)降至预设门限值时，获得此时限流控制电路11当前提供的电流值作为时限流控制电路11的限流值，并通过限流控制电路11限制无线上网终端的工作电流值小于等于限流值。为防止抖动，处理器16可以多次测量并通过算法进行数据处理，获得限流控制电路11输出端的更为准确的电压值。在确定限流控制电路11输出端的电压值降至预设门限值时，处理器16具体可以通过数模转换接口输出限流值控制信号，控制限流控制电路11的限流值。Step 4: When the voltage value detected by the detecting circuit 12 (ie, the voltage value at the output end of the current limiting control circuit 11) falls to a preset threshold value, the current value currently provided by the current limiting control circuit 11 is obtained as a time limit flow control circuit. The current limiting value of 11 is limited, and the current limiting value of the wireless internet terminal is limited by the current limiting control circuit 11 to be less than or equal to the current limiting value. To prevent jitter, the processor 16 can measure the data multiple times and perform an algorithmic processing to obtain a more accurate voltage value at the output of the current limiting control circuit 11. When determining that the voltage value at the output of the current limiting control circuit 11 falls to a preset threshold, the processor 16 may specifically output a current limit value control signal through the digital-to-analog conversion interface to control the current limit value of the current limiting control circuit 11.
其中，预设门限值具体可以为4.75v。当限流控制电路11的输出端电压降至预设门限时，表明无线上网终端的电流需求已经达到PC端供电能力的上限，此时若无线上网终端的电流继续增大将超出PC端的负荷，因此，将限流控制电路11当前提供的电流(即无线上网终端的电流)设置为限流控制电路11的限流值，从而通过限流控制电路11限制无线上网终端的工作电流值不超过限流值，避免因无线上网终端工作电路过大而导致PC端死机的同时，还根据PC的最大供电能力调节限流值，解决了现有技术中无线上网终端存在无法根据PC的供电能力调节限流值的技术问题，提高了无线上网终端对电源的利用率。为此，本申请实施例提供的无线上网终端可以适用于不同供电能力的 PC端，保证无线上网终端可以配合更多的PC正常运行。The preset threshold may be specifically 4.75v. When the output voltage of the current limiting control circuit 11 falls to a preset threshold, it indicates that the current demand of the wireless internet terminal has reached the upper limit of the power supply capability of the PC. At this time, if the current of the wireless internet terminal continues to increase, the load of the PC end will be exceeded. The current currently provided by the current limiting control circuit 11 (ie, the current of the wireless internet terminal) is set as the current limiting value of the current limiting control circuit 11, so that the current limiting value of the wireless internet terminal is not limited by the current limiting control circuit 11 to exceed the current limiting value. In order to avoid the PC terminal crash due to the excessive working circuit of the wireless Internet terminal, the current limit value is adjusted according to the maximum power supply capacity of the PC, and the wireless network terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC. The technical problem has improved the utilization of the power supply by the wireless internet terminal. Therefore, the wireless internet terminal provided by the embodiment of the present application can be applied to different power supply capabilities. On the PC side, ensure that the wireless Internet terminal can work with more PCs.
无线上网终端在上电检测完成获得适配PC端的限流值后，关闭负载电路15，开启射频电路14，进入正常工作状态。进一步的，处理器16可以在获得所述限流控制电路当前提供的电流值之后，获得射频电路14在小于等于所述限流值的电流范围内工作时的最大射频功率；然后，关闭所述负载电路15，开启所述射频电路14并控制所述射频电路14按不超过所述最大射频功率的功率收发信号，使得无线上网终端的电流需求与PC供电能力相适配，保证无线上网终端运行时性能最佳。After the power-on detection is completed, the wireless network terminal obtains the current limit value of the adapted PC, turns off the load circuit 15, turns on the RF circuit 14, and enters a normal working state. Further, after obtaining the current value currently provided by the current limiting control circuit, the processor 16 may obtain the maximum RF power when the radio frequency circuit 14 operates in a current range less than or equal to the current limiting value; The load circuit 15 turns on the radio frequency circuit 14 and controls the radio frequency circuit 14 to transmit and receive signals according to the power of the maximum radio frequency, so that the current demand of the wireless internet terminal is matched with the power supply capability of the PC, and the wireless internet terminal is operated. Best performance.
实施例二Embodiment 2
请参考图4，基于实施例一提供的无线上网终端，本申请实施例提供一种限流控制方法，应用于所述无线上网终端，所述无线上网终端包含限流控制电路、检测电路及射频电路，所述检测电路和所述射频电路均与所述限流控制电路的输出端相连，所述方法包括：Referring to FIG. 4, based on the wireless Internet access terminal provided in Embodiment 1, the embodiment of the present application provides a current limiting control method, which is applied to the wireless Internet access terminal, where the wireless Internet access terminal includes a current limiting control circuit, a detection circuit, and a radio frequency. a circuit, the detection circuit and the radio frequency circuit are both connected to an output of the current limiting control circuit, the method comprising:
步骤401：在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；Step 401: Turn off the radio frequency circuit to turn on the load circuit when the wireless internet terminal is powered on, wherein a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or The impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
步骤402：控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路检测到的所述限流控制电路的输出端的电压值；Step 402: When the current of the current limiting control circuit is gradually increased from the initial current value according to the preset step value, the voltage value of the output end of the current limiting control circuit detected by the detecting circuit is sequentially obtained;
步骤403：当获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值；Step 403: When the obtained voltage value falls to a preset threshold, obtaining a current value currently provided by the current limiting control circuit as a current limiting value;
步骤404：通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。Step 404: Limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
在具体实施过程中，在获得所述限流控制电路当前提供的电流值之后，所述方法还包括：In a specific implementation, after obtaining the current value currently provided by the current limiting control circuit, the method further includes:
获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射 频功率；Obtaining a maximum shot when the radio frequency circuit operates in a current range less than or equal to the current limit value Frequency power
关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率的功率收发信号。Turning off the load circuit, turning on the radio frequency circuit, and controlling the radio frequency circuit to transmit and receive signals according to power that does not exceed the maximum radio frequency power.
在具体实施过程中，无线上网终端的所述预设门限值具体可以为4.75v。In the specific implementation process, the preset threshold of the wireless internet terminal may specifically be 4.75v.
前述图1至图3实施例中提供的无线上网终端的各种变化方式和具体实例同样适用于本实施例，通过前述对无线上网终端及其工作过程的详细描述，本领域技术人员可以清楚的知道本实施例中限流控制方法的实施过程，所以为了说明书的简洁，在此不再详述。Various changes and specific examples of the wireless Internet access terminal provided in the foregoing embodiments of FIG. 1 to FIG. 3 are also applicable to the present embodiment. The foregoing detailed description of the wireless Internet access terminal and its working process can be clearly understood by those skilled in the art. The implementation process of the current limiting control method in this embodiment is known, so for the sake of brevity of the description, it will not be described in detail herein.
实施例三Embodiment 3
请参考图5，基于实施例一提供的所述无线上网终端，本申请实施例提供一种限流控制装置。所述无线上网终端包含限流控制电路、检测电路及射频电路，所述检测电路和所述射频电路均与所述限流控制电路的输出端相连，所述限流控制装置包括：Referring to FIG. 5, based on the wireless internet terminal provided in the first embodiment, the embodiment of the present application provides a current limiting control apparatus. The wireless network terminal includes a current limiting control circuit, a detection circuit, and a radio frequency circuit, and the detection circuit and the radio frequency circuit are both connected to an output end of the current limiting control circuit, and the current limiting control device includes:
开关控制单元51，用于在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；The switch control unit 51 is configured to: when the wireless internet terminal is powered on, turn off the radio frequency circuit, and turn on the load circuit; wherein a maximum load current value of the load circuit and a maximum operating current of the radio frequency circuit The values are the same, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
控制单元52，用于控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路检测到的所述限流控制电路的输出端的电压值；a control unit 52, configured to control, when the current of the current limiting control circuit is gradually increased from the initial current value by a preset step value, sequentially obtaining the voltage value of the output end of the current limiting control circuit detected by the detecting circuit ;
限流值获取单元53，用于当所述控制单元获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值；The current limit value obtaining unit 53 is configured to obtain, as the current limit value, a current value currently provided by the current limiting control circuit when the voltage value obtained by the control unit falls to a preset threshold value;
所述控制单元52，还用于通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。The control unit 52 is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
在具体实施过程中，本申请实施例提供的限流控制装置还包括射频功率获得单元，用于在所述限流值获取单元获得所述限流控制电路当前提供的电流值之后，获得所述射频电路在小于等于所述限流值的电流范围内工作时的 最大射频功率；In a specific implementation, the current limiting control apparatus provided by the embodiment of the present application further includes a radio frequency power obtaining unit, configured to obtain the current value after the current limiting value obtaining unit obtains the current value currently provided by the current limiting control circuit. When the radio frequency circuit operates in a current range less than or equal to the current limit value Maximum RF power;
所述开关控制单元51，还用于关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率收发信号。The switch control unit 51 is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to the maximum radio frequency.
在具体实施过程中，无线上网终端的所述预设门限值具体可以为4.75v。In the specific implementation process, the preset threshold of the wireless internet terminal may specifically be 4.75v.
前述图1至图3实施例中提供的无线上网终端的各种变化方式和具体实例同样适用于本实施例，通过前述对无线上网终端及其工作过程的详细描述，本领域技术人员可以清楚的知道本实施例中限流控制装置的实施方法，所以为了说明书的简洁，在此不再详述。Various changes and specific examples of the wireless Internet access terminal provided in the foregoing embodiments of FIG. 1 to FIG. 3 are also applicable to the present embodiment. The foregoing detailed description of the wireless Internet access terminal and its working process can be clearly understood by those skilled in the art. Knowing the implementation method of the current limiting control device in this embodiment, for the sake of brevity of the description, it will not be described in detail herein.
本发明的一个或多个实施例，可以实现如下技术效果：The one or more embodiments of the present invention can achieve the following technical effects:
通过在无线上网终端的限流控制电路输出端设置一检测电路及负载电路，处理器在无线上网终端上电时，开启负载电路模拟无线上网终端的射频电路工作时的负载，逐步增加限流控制电路的电流，并对应检测限流控制电路输出端的电压，以检测PC提供电源的接口的供电能力，当限流控制电路输出端的电压降至预设门限值时，获得限流控制电路对应的电流值即当前接入的PC的最大供电电流作为限流控制电路的限流值，从而解决了现有技术中无线上网终端存在无法根据PC的供电能力调节限流值的技术问题，提高了无线上网终端对电源的利用率。By setting a detection circuit and a load circuit at the output end of the current limiting control circuit of the wireless internet terminal, when the wireless power terminal is powered on, the processor starts the load circuit to simulate the load of the wireless circuit of the wireless internet terminal, and gradually increases the current limiting control. The current of the circuit corresponds to the voltage at the output of the current limiting control circuit to detect the power supply capability of the interface provided by the PC. When the voltage at the output of the current limiting control circuit falls to a preset threshold, the current corresponding to the current limiting control circuit is obtained. The value is the current supply current of the currently connected PC as the current limit value of the current limiting control circuit, thereby solving the technical problem that the wireless internet terminal in the prior art cannot adjust the current limit value according to the power supply capability of the PC, and improves the wireless Internet access. Terminal utilization of power.
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, a special purpose computer, an embedded processor, or other programmable data processing device to produce a machine that enables Instructions executed by a processor of a computer or other programmable data processing device generate means for implementing the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。 It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims (11)

  1. 一种无线上网终端，其特征在于，包括：A wireless internet terminal, comprising:
    限流控制电路，用于限制无线上网终端工作电流的大小；a current limiting control circuit for limiting the operating current of the wireless internet terminal;
    检测电路，与所述限流控制电路的输出端相连，用于检测所述限流控制电路的输出端的电压值；a detection circuit connected to the output end of the current limiting control circuit for detecting a voltage value at an output end of the current limiting control circuit;
    直流电压转换电路，与所述限流控制电路的输出端相连，用于转换并输出所述限流控制电路输出的电流电压；a DC voltage conversion circuit connected to the output end of the current limiting control circuit for converting and outputting a current voltage output by the current limiting control circuit;
    射频电路，与所述直流电压转换电路的输出端相连，用于在所述无线上网终端正常工作时收发信号；a radio frequency circuit connected to the output end of the DC voltage conversion circuit for transmitting and receiving signals when the wireless internet terminal is working normally;
    负载电路，与述直流电压转换电路的输出端相连，用于在所述无线上网终端上电检测时提供负载；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；a load circuit connected to an output end of the DC voltage conversion circuit for providing a load when the wireless network terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the RF circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
    处理器，分别与所述限流控制电路、所述检测电路、所述直流电压转换电路、所述负载电路及所述射频电路的一端相连，用于在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路，并控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大，依次获得所述检测电路检测到的所述电压值；当获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值，通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。The processor is connected to one end of the current limiting control circuit, the detecting circuit, the DC voltage converting circuit, the load circuit and the RF circuit, respectively, when the wireless internet terminal is powered on, Turning off the RF circuit, turning on the load circuit, and controlling the current of the current limiting control circuit to gradually increase from the initial current value by a preset step value, and sequentially obtaining the voltage value detected by the detecting circuit; When the obtained voltage value falls to a preset threshold value, obtaining a current value currently provided by the current limiting control circuit as a current limiting value, and limiting, by the current limiting control circuit, an operating current value of the wireless internet terminal Less than or equal to the current limit value.
  2. 如权利要求1所述的无线上网终端，其特征在于，所述处理器还用于：The wireless internet terminal according to claim 1, wherein the processor is further configured to:
    在所述获得所述限流控制电路当前提供的电流值之后，获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射频功率；After obtaining the current value currently provided by the current limiting control circuit, obtaining a maximum radio frequency power when the radio frequency circuit operates in a current range less than or equal to the current limiting value;
    关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率的功率收发信号。 Turning off the load circuit, turning on the radio frequency circuit, and controlling the radio frequency circuit to transmit and receive signals according to power that does not exceed the maximum radio frequency power.
  3. 如权利要求1或2任一所述的无线上网终端，其特征在于，所述检测电路具体包括：The wireless internet terminal according to any one of claims 1 to 2, wherein the detecting circuit specifically comprises:
    至少两个串联电阻，其中，所述至少两个串联电阻中的第一电阻的一端与所述限流控制电路的输出端相连，所述第一电阻的另一端与所述至少两个串联电阻中的第二电阻的一端相连，所述第二电阻的另一端接地，所述处理器的模数转换接口与所述第二电阻的一端相连，所述第二电阻上分得的电压值在所述模数转换接口的工作电平范围内。At least two series resistors, wherein one end of the first one of the at least two series resistors is connected to an output of the current limiting control circuit, the other end of the first resistor and the at least two series resistors One end of the second resistor is connected, the other end of the second resistor is grounded, and an analog-to-digital conversion interface of the processor is connected to one end of the second resistor, and the voltage value on the second resistor is The analog to digital conversion interface operates within a range of operating levels.
  4. 如权利要求1～3任一所述的无线上网终端，其特征在于，所述预设门限值具体为4.75v。The wireless internet terminal according to any one of claims 1 to 3, wherein the preset threshold is specifically 4.75v.
  5. 如权利要求1～4任一所述的无线上网终端，其特征在于，所述初始电流值具体为所述无线上网终端在基带工作时的最小电流值。The wireless internet terminal according to any one of claims 1 to 4, wherein the initial current value is specifically a minimum current value of the wireless internet terminal when the baseband is operating.
  6. 一种无线上网终端的限流控制方法，其特征在于，所述无线上网终端包含限流控制电路、检测电路及射频电路，所述检测电路和所述射频电路均与所述限流控制电路的输出端相连，所述方法包括：A current limiting control method for a wireless internet terminal, wherein the wireless internet terminal comprises a current limiting control circuit, a detecting circuit and a radio frequency circuit, wherein the detecting circuit and the radio frequency circuit are both connected to the current limiting control circuit The outputs are connected, and the method includes:
    在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；Turning off the radio frequency circuit to turn on the load circuit when the wireless internet terminal is powered on; wherein a maximum load current value of the load circuit is the same as a maximum operating current value of the radio frequency circuit, or The impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
    控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路检测到的所述限流控制电路的输出端的电压值；When the current of the current limiting control circuit is gradually increased from the initial current value by a preset step value, the voltage value of the output end of the current limiting control circuit detected by the detecting circuit is sequentially obtained;
    当获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值；When the obtained voltage value falls to a preset threshold, obtaining a current value currently provided by the current limiting control circuit as a current limit value;
    通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。And limiting, by the current limiting control circuit, an operating current value of the wireless internet terminal that is less than or equal to the current limiting value.
  7. 如权利要求6所述的方法，其特征在于，在获得所述限流控制电路当前提供的电流值之后，所述方法还包括：The method of claim 6, wherein after obtaining the current value currently provided by the current limiting control circuit, the method further comprises:
    获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射频功率； Obtaining a maximum radio frequency power when the radio frequency circuit operates in a current range less than or equal to the current limit value;
    关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率的功率收发信号。Turning off the load circuit, turning on the radio frequency circuit, and controlling the radio frequency circuit to transmit and receive signals according to power that does not exceed the maximum radio frequency power.
  8. 如权利要求6或7所述的方法，其特征在于，所述预设门限值具体为4.75v。The method according to claim 6 or 7, wherein the preset threshold is specifically 4.75v.
  9. 一种无线上网终端的限流控制装置，其特征在于，无线上网终端包含限流控制电路、检测电路及射频电路，所述检测电路和所述射频电路均与所述限流控制电路的输出端相连，所述装置包括：A current limiting control device for a wireless internet terminal, characterized in that the wireless internet terminal comprises a current limiting control circuit, a detecting circuit and a radio frequency circuit, and the detecting circuit and the radio frequency circuit are both output ends of the current limiting control circuit Connected, the device includes:
    开关控制单元，用于在所述无线上网终端上电检测时，关闭所述射频电路，开启所述负载电路；其中，所述负载电路的最大负载电流值与所述射频电路的最大工作电流值相同，或者，所述负载电路的阻抗值与所述射频电路的阻抗值相同；a switch control unit, configured to turn off the radio frequency circuit and turn on the load circuit when the wireless internet terminal is powered on; wherein a maximum load current value of the load circuit and a maximum operating current value of the radio frequency circuit Similarly, or the impedance value of the load circuit is the same as the impedance value of the radio frequency circuit;
    控制单元，用于控制所述限流控制电路的电流从初始电流值按预设步长值逐步增大时，依次获得所述检测电路检测到的所述限流控制电路的输出端的电压值；a control unit, configured to control, when the current of the current limiting control circuit is gradually increased from the initial current value by a preset step value, sequentially obtaining a voltage value of the output end of the current limiting control circuit detected by the detecting circuit;
    限流值获取单元，用于当所述控制单元获得的所述电压值降至预设门限值时，获得所述限流控制电路当前提供的电流值作为限流值；a current limiting value obtaining unit, configured to obtain a current value currently provided by the current limiting control circuit as a current limiting value when the voltage value obtained by the control unit falls to a preset threshold value;
    所述控制单元，还用于通过所述限流控制电路限制所述无线上网终端的工作电流值小于等于所述限流值。The control unit is further configured to limit, by the current limiting control circuit, that an operating current value of the wireless internet terminal is less than or equal to the current limiting value.
  10. 如权利要求9所述的装置，其特征在于，还包括射频功率获得单元，用于在所述限流值获取单元获得所述限流控制电路当前提供的电流值之后，获得所述射频电路在小于等于所述限流值的电流范围内工作时的最大射频功率；The device according to claim 9, further comprising a radio frequency power obtaining unit, configured to obtain the radio frequency circuit after the current limit value obtaining unit obtains a current value currently provided by the current limiting control circuit a maximum RF power when operating in a current range less than or equal to the current limit value;
    所述开关控制单元，还用于关闭所述负载电路，开启所述射频电路并控制所述射频电路按不超过所述最大射频功率的功率收发信号。The switch control unit is further configured to turn off the load circuit, turn on the radio frequency circuit, and control the radio frequency circuit to transmit and receive signals according to a power that does not exceed the maximum radio frequency power.
  11. 如权利要求9或10所述的方法，其特征在于，所述预设门限值具体为4.75v。 The method according to claim 9 or 10, wherein the preset threshold is specifically 4.75v.
PCT/CN2014/087566 2014-09-26 2014-09-26 Wireless internet access terminal, current limiting control apparatus and current limiting control method WO2016045093A1 (en)

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CN107042804A (en) * 2017-05-04 2017-08-15 山东省科学院自动化研究所 A kind of throw load pulse protector
CN107042804B (en) * 2017-05-04 2023-05-26 山东省科学院自动化研究所 Load throwing pulse protection device
CN117412265A (en) * 2023-10-18 2024-01-16 广州通则康威科技股份有限公司 Method and device for linearly controlling power of TDD LTE-R data terminal
CN117412265B (en) * 2023-10-18 2024-03-29 广州通则康威科技股份有限公司 Power linear control method and device for LTE-R data terminal

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