WO2014101757A1 - 手持电子设备的过热保护方法、装置和手持电子设备 - Google Patents

手持电子设备的过热保护方法、装置和手持电子设备 Download PDF

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Publication number
WO2014101757A1
WO2014101757A1 PCT/CN2013/090382 CN2013090382W WO2014101757A1 WO 2014101757 A1 WO2014101757 A1 WO 2014101757A1 CN 2013090382 W CN2013090382 W CN 2013090382W WO 2014101757 A1 WO2014101757 A1 WO 2014101757A1
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Prior art keywords
temperature
cold zone
zone temperature
handheld electronic
sub
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PCT/CN2013/090382
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English (en)
French (fr)
Inventor
唐文兵
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华为终端有限公司
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Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to US14/651,406 priority Critical patent/US10025332B2/en
Priority to EP13868060.8A priority patent/EP2940550B1/en
Publication of WO2014101757A1 publication Critical patent/WO2014101757A1/zh

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/1928—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperature of one space
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means
    • G06F1/206—Cooling means comprising thermal management

Definitions

  • TECHNICAL FIELD Embodiments of the present invention relate to a thermal protection technology for a handheld electronic device, and more particularly to a method, an apparatus, and a handheld electronic device for overheat protection of a handheld electronic device.
  • a thermal protection device is a hand-held electronic device, such as a necessary part of a mobile phone. The protection of the electronic device can be protected by overheat protection, resulting in better user use.
  • the overheat protection uses the hot zone temperature to map the case temperature.
  • the hot zone temperature is higher than a certain threshold, the system starts the frequency limit and other measures to reduce the power consumption of the whole machine, thereby finally achieving the purpose of lowering the temperature of the case and protecting the human body. Avoid contact with the contact surface of the handheld terminal.
  • the overheat protection technology commonly used in existing handheld electronic devices is based on the absolute temperature of the reference hotspot on the handheld electronic device to initiate an overheat protection scheme.
  • a hot zone sensor is generally disposed at a position of a main board, and a temperature is collected as a reference hot spot. When the temperature of the collection point reaches a certain threshold, the overheat protection scheme is activated.
  • the overheat protection scheme is usually limited frequency limiting.
  • the action in the overheat protection scheme can only be based on the absolute temperature of the reference hotspot, and cannot be changed according to the specific use ambient temperature, so the adaptability is poor;
  • absolute temperature can be used as the threshold for the startup of the overheat protection scheme.
  • the present invention provides a method, a device, and a handheld electronic device for overheat protection of a handheld electronic device, which are used to solve the defects that the prior art implements overheat protection only considering a single temperature, resulting in poor adaptability and frequent triggering of overheat protection.
  • an embodiment of the present invention provides a method for protecting an overheating of a handheld electronic device, including: Obtaining a cold zone temperature from a cold zone collection point, wherein the cold zone collection point is disposed at a position of the handheld electronic device away from the heat generating component;
  • the overheat protection scheme corresponding to the cold zone temperature and the hot zone temperature is specifically selected to include:
  • An overheat protection scheme corresponding to the ambient temperature zone and the hot zone temperature is selected.
  • the overheat protection scheme corresponding to the cold zone temperature and the hot zone temperature is selected to include:
  • the cold zone temperature is less than or equal to the first threshold value, determining that the current ambient temperature zone is currently located, and triggering execution of the first sub-scheme according to the hot zone temperature;
  • the cold zone temperature is greater than or equal to the second threshold
  • obtaining the cold zone temperature includes:
  • the average value of the plurality of temperature values within the set time period is calculated as the cold zone temperature.
  • the cold spot collection point is a thermistor connected in series between the current source and the ground line, and obtaining the cold zone temperature from the cold zone collection point includes:
  • a voltage change in the thermistor is obtained, and the cold zone temperature is calculated based on the voltage change.
  • an embodiment of the present invention provides an overheat protection device for a handheld electronic device, including: a cold zone temperature acquisition module, configured to acquire a cold zone temperature from a cold zone collection point, wherein the cold zone collection point is set in the Positioning the handheld electronic device away from the heating element;
  • the overheat protection scheme selection module is used to select an overheat protection scheme corresponding to the cold zone temperature and the hot zone temperature.
  • the overheat protection scheme selection module includes:
  • a threshold comparison unit configured to compare the cold zone temperature with a set threshold to determine a current ambient temperature zone
  • a scheme selection unit configured to select an overheat protection party corresponding to the ambient temperature zone and the hot zone temperature Case.
  • the overheat protection scheme selection module includes:
  • a temperature section identifying unit configured to identify a temperature section in which the temperature of the cold zone is located
  • a first sub-scheme triggering unit configured to: when it is determined that the cold zone temperature is less than or equal to the first threshold, determine that the current ambient temperature zone is currently, and trigger the execution of the first sub-schema according to the hot zone temperature ;
  • a second sub-scheme triggering unit configured to determine, when the cold zone temperature is greater than the first threshold and less than or equal to the second threshold, to determine that the current zone is in the second ambient temperature zone, and according to the hot zone The temperature triggers execution of the second sub-scheme;
  • a third sub-scheme triggering unit configured to determine that the third ambient temperature section is currently determined when the cold zone temperature is greater than or equal to the second threshold, and trigger the third sub-schema according to the hot zone temperature .
  • an embodiment of the present invention provides a handheld electronic device, including:
  • a cold zone collection point disposed at a position away from the heating element of the handheld electronic device
  • the cold region collection point is a thermistor connected in series between the current source and the ground line
  • the overheat protection technology of the handheld electronic device selects the overheat protection scheme by taking the temperature of the cold zone and considering the temperature of the cold zone, so as to realize the overheat protection of the handheld electronic device, the multi-point temperature can be comprehensively considered to solve the existing Overheat protection technology has poor adaptability and frequent triggering of overheat protection.
  • FIG. 1A is a flowchart of a method for protecting a thermal protection of a handheld electronic device according to a first embodiment of the present invention
  • FIG. 1B is a schematic diagram of a cold zone temperature and a thermal protection scheme according to an embodiment of the present invention
  • FIG. 3 is a circuit schematic diagram of a cold zone thermistor in a handheld electronic device according to Embodiment 3 of the present invention.
  • FIG. 1A is a flowchart of a method for overheating protection of a handheld electronic device according to Embodiment 1 of the present invention.
  • the present embodiment is applicable to overheat protection of a handheld electronic device, and the method may be performed by an overheat protection device of the handheld electronic device.
  • the device can be implemented in the form of hardware and/or software integrated into the handheld electronic device.
  • the handheld electronic device can be any terminal device such as a mobile phone or a tablet computer.
  • the method specifically includes the following steps:
  • Step 110 Obtain a cold zone temperature from a cold zone collection point, where the cold zone collection point is disposed at a position away from the heat generating component of the handheld electronic device;
  • the heating element may be any component that can generate heat on the handheld electronic device, and is usually a host, a printed circuit board (PCB) board, and the like.
  • the temperature collected by the cold zone collection point needs to reflect the ambient temperature at which the handheld electronic device is located. Therefore, it should be kept away from the heating element as much as possible to avoid the influence of it, and the accurate ambient temperature can be collected.
  • Step 120 Select an overheat protection scheme corresponding to the cold zone temperature and the hot zone temperature.
  • the hot zone temperature is the temperature collected by the hot zone collection point on the handheld electronic device.
  • the hot zone collection point is generally adjacent to the heating element on the handheld electronic device to monitor whether the temperature is overheated.
  • the temperature of the cold zone is not simply considered, but the temperature of the cold zone is taken into consideration, and a suitable overheat protection scheme is selected.
  • the cold zone temperature is obtained from the cold zone collection point, and the corresponding overheat protection scheme is selected according to the cold zone temperature and the hot zone temperature, thereby solving the problem that the existing thermal protection scheme only considers a single point temperature change and causes overheating.
  • the protection technology is poorly adapted and the overheat protection is frequently triggered.
  • the technical solution of this embodiment is particularly suitable for considering the influence of ambient temperature on overheat protection.
  • the temperature of the cold zone in the technical solution of the embodiment generally reflects the level of the ambient temperature, and selects a corresponding thermal protection sub-solution among the preset sets of thermal protection schemes, fully taking into account the difference of different temperature environments, and does not
  • the frequency limiting scheme is frequently and prematurely activated when the ambient temperature is too high, resulting in an unpleasant user experience. And in the case of monitoring the use of high ambient temperature, raise the temperature limit of the frequency limit, so that even in the case of high ambient temperature, some common use scenarios can operate normally.
  • the operation of obtaining the temperature of the cold zone preferably includes the steps of: obtaining a temperature value from the cold zone collection point according to the set period; calculating an average value of the plurality of temperature values within the set duration, as Cold zone temperature. Obtain an average of the cold zone temperatures to bring the cold zone temperature as close as possible to the ambient temperature.
  • an overheat protection scheme optimal package corresponding to the cold zone temperature and the hot zone temperature is selected.
  • the method includes the following steps: comparing the cold zone temperature with a set threshold to determine a current ambient temperature zone; and selecting an overheat protection scheme corresponding to the ambient temperature zone and the hot zone temperature.
  • the ambient temperature section may be specifically divided into three, that is, firstly, the temperature section in which the temperature of the cold zone is located; when it is recognized that the temperature of the cold zone is less than or equal to the first threshold, it is determined that the current temperature is An ambient temperature section, and triggering execution of the first sub-scheme according to the hot zone temperature; determining that the cold zone temperature is greater than the first threshold and less than or equal to the second threshold An ambient temperature section, and triggering execution of the second sub-scheme according to the hot zone temperature; determining that the cold zone temperature is greater than or equal to the second threshold, determining that the third ambient temperature zone is currently, and The hot zone temperature triggers the execution of the third sub-scheme.
  • the thermal protection sub-scheme is selectively invoked to execute the first sub-schema, the second sub-scheme, or the third sub-scheme.
  • the second sub-scheme generally increases the temperature threshold of the hot zone upward by 3-5 degrees, and the third sub-solution can further increase the temperature threshold of the hot zone.
  • the number of cycles in the thermal protection sub-solution can also be reduced at the same time, that is, the measures for reducing the power of the device implemented by the thermal protection sub-solution to reduce the temperature are different, and the cycle of monitoring the superheat temperature is different.
  • FIG. 1B The corresponding relationship between the three-seed scheme and the threshold value is shown in FIG. 1B, which corresponds to the cold zone temperature and the overheat protection scheme applicable to the first embodiment of the present invention.
  • the existing neutron solution of the overheat protection technology solution is unique and does not change with the temperature of the cold zone.
  • the technical solution of the embodiment can select a set of corresponding thermal protection sub-solutions in a preset set of thermal protection schemes by monitoring the ambient temperature of the cold zone temperature and combining the hot zone temperature, so that the handheld electronic device can more effectively adapt to the temperature over time. Higher environment.
  • FIG. 2 is a schematic structural diagram of an overheat protection device for a handheld electronic device according to Embodiment 2 of the present invention.
  • the device of the present embodiment can be used to perform the overheat protection method for a handheld electronic device according to Embodiment 1 of the present invention shown in FIG.
  • the technical solution, the device specifically includes the following: a cold zone temperature acquisition module 210 and an overheat protection scheme selection module 220.
  • the cold zone temperature collecting module 210 is configured to obtain a cold zone temperature from the cold zone collecting point, wherein the cold zone collecting point is disposed at a position of the handheld electronic device away from the heating component; the overheating protection scheme selecting module 220 is used Select an overheat protection scheme that corresponds to the cold zone temperature and hot zone temperature.
  • the overheat protection scheme selection module 220 preferably includes: a threshold value comparison unit 221 and a scheme selection unit 222.
  • the threshold value comparison unit 221 is configured to compare the cold zone temperature with the set threshold value to determine a current ambient temperature zone.
  • the solution selection unit 222 is configured to select the ambient temperature and the hot zone. The temperature corresponds to the overheat protection scheme.
  • the overheat protection scheme selection module may include: a temperature section identification unit, a first sub scheme triggering unit, a second sub scheme triggering unit, and a third sub scheme triggering unit.
  • the temperature segment identification unit is configured to identify a temperature segment in which the temperature of the cold zone is located; the first sub-scheme triggering unit is configured to: when it is recognized that the cold zone temperature is less than or equal to the first threshold value, Determining that the first ambient temperature zone is currently in use, and triggering execution of the first sub-scheme according to the hot zone temperature; and the second sub-scheme triggering unit, configured to: when it is recognized that the cold zone temperature is greater than the first threshold value and less than or When the second threshold is equal to the second threshold, determining that the second ambient temperature zone is currently performed, and performing the second sub-scheme according to the hot zone temperature triggering; the third sub-scheme triggering unit is configured to: when the cold zone temperature is greater than Or equal to the second threshold, determining that the third ambient temperature zone is currently in progress, and triggering the execution of the third sub-scheme according to the hot zone temperature.
  • the cold zone temperature collecting module 210 may preferably be a negative coefficient thermistor connected in series between the constant current source and the ground line to obtain a voltage change in the thermistor and change according to the voltage.
  • the cold zone temperature is calculated.
  • the program can accurately measure the instantaneous temperature of the cold spot collection point.
  • the threshold comparison unit module 221 preferably sets two threshold values, that is, the first threshold value t0 and the second threshold value tl, and the cold zone temperature is recorded as Tcold, as shown in the figure.
  • Tcold t0 the first sub-scheme is executed according to the hot zone temperature.
  • tO ⁇ Tcold tl the second sub-scheme is executed according to the hot zone temperature.
  • Tcold ⁇ tl the third sub-period is executed according to the hot zone temperature.
  • the scheme is shown in Figure 1B.
  • the triggering protection action is frequently and prematurely activated when the ambient temperature is too high, resulting in an unpleasant user experience.
  • the embodiment of the present invention further provides a handheld electronic device, which includes a cold zone collection point disposed at a position away from the heat generating component of the handheld electronic device, and further includes an overheat protection device of the handheld electronic device provided by any embodiment of the present invention.
  • the overheat protection device provided by the embodiment of the present invention may be implemented by hardware, but is preferably implemented by software, and may be a code or a set of instructions, configured in a memory of the handheld electronic device, and executed by a processor or a controller such as a CPU, and handheld. Other hardware of the electronic device cooperates to achieve overheat protection.
  • the handheld electronic device can perform all the functions of the foregoing embodiments, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • the cold zone collection point is preferably a thermistor R1 connected in series between the current source and the ground.
  • the cold zone temperature is taken from the cold zone collection point, located in a section of the handheld device remote from the main board (hot zone), such as one end of the main circuit board connecting the daughter board motor or the sub-board motor.
  • the associated matching circuit includes: a negative coefficient thermistor and a constant current source, and the corresponding temperature value is calculated by monitoring the change of the voltage.
  • the handheld electronic device is also provided with a collection point for the hot zone temperature, such as a temperature sensor.
  • the temperature sensor can also collect temperature in the form of a thermistor. Degree.
  • the technical solution of the present embodiment solves the problem that the existing thermal protection scheme cannot be based on the ambient temperature by obtaining the cold zone temperature from the cold zone collection point and selecting the corresponding overheat protection scheme according to the cold zone temperature and the hot zone temperature. Two defects that frequently trigger protection actions when changes and ambient temperatures are too high.
  • the technical solution of the embodiment selects a corresponding thermal protection sub-solution among the preset sets of thermal protection sub-solutions according to the level of the ambient temperature, fully taking into account the difference of different temperature environments, and does not exceed the ambient temperature too high.
  • the frequency limit scheme is activated frequently and prematurely, resulting in an unpleasant user experience. And in the case of monitoring the use of high ambient temperature, raise the temperature limit of the frequency limit, so that even in the case of high ambient temperature, some common use scenarios can also operate normally.

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Abstract

本发明提供了一种手持电子设备的过热保护方法、装置和电子手持设备。该方法包括从冷区采集点获取冷区温度，其中，所述冷区采集点设置在所述手持电子设备远离发热元件的位置；选择与冷区温度和热区温度对应的过热保护方案。本发明实施例提供的手持电子设备的过热保护技术，通过获取冷区温度，并考虑冷区温度来选择过热保护方案，使得手持电子设备的过热保护能够考虑多点温度，适应性强。

Description

手持电子设备的过热保护方法、 装置和手持电子设备 本申请要求于 2012年 12月 26日提交中国专利局、 申请号为 CN201210574640. 4、 发明名称为 "手持电子设备的过热保护方法、 装置和手持电子设备"的中国专利申请的 优先权， 其全部内容通过引用结合在本申请中。 技术领域 本发明实施例涉及手持电子设备的热保护技术，尤其涉及一种手持电子设备的过热 保护方法、 装置和手持电子设备。 背景技术 过热保护装置是手持电子设备， 如手机中必要的一部分， 通过过热保护可以保护手 持电子设备的电路， 得到更好的用户使用效果。 过热保护即利用热区温度来映射外壳温 度， 当热区温度高于某个门限值时， 系统启动限频等措施来降低整机的功耗， 从而最终 实现外壳温度下降的目的， 保护人体与手持终端的接触面避免烫伤。
现有手持电子设备常采用的过热保护技术是根据手持电子设备上的参考热点的绝 对温度触发启动过热保护方案。 例如手机中一般是在主板的位置设置热区传感器， 作为 参考热点， 采集温度。 当采集点温度达到一定门限， 则启动过热保护方案， 过热保护方 案通常是限频限流。
但是， 上述的现有手持电子设备过热保护技术， 普遍存在两个问题：
1、 过热保护方案中的动作只能基于参考热点的绝对温度， 不能根据具体的使用环 境温度而变化， 因此适应性差；
2、 在环境温度较低的环境， 可以用绝对温度作为过热保护方案启动的门限， 但是 在环境温度较高的情况下， 如果只用绝对温度， 很容易造成过热保护方案的频繁触发， 从而最终影响到用户的使用性能。
发明内容 本发明提供一种手持电子设备的过热保护方法、 装置和手持电子设备， 用以解决现 有技术仅考虑单一温度而实施过热保护导致适应性差、 过热保护频繁触发的缺陷。
第一方面， 本发明实施例提供一种手持电子设备的过热保护方法， 包括： 从冷区采集点获取冷区温度， 其中， 所述冷区采集点设置在所述手持电子设备远离 发热元件的位置；
选择与冷区温度和热区温度对应的过热保护方案。
在第一方面的第一种可能的实现方式中，选择与冷区温度和热区温度对应的过热保 护方案具体包括：
将冷区温度与设定门限值进行比较， 确定当前的环境温度区段；
选择与所述环境温度区段和所述热区温度对应的过热保护方案。
在第一方面的第二种可能的实现方式中，选择与冷区温度和热区温度对应的过热保 护方案包括：
识别所述冷区温度所处的温度区段；
当识别到所述冷区温度小于或等于第一门限值时， 确定当前处于第一环境温度区 段， 并根据所述热区温度触发执行第一子方案；
当识别到所述冷区温度大于第一门限值且小于或等于第二门限值时，确定当前处于 第二环境温度区段， 并根据所述热区温度触发执行第二子方案；
当识别到所述冷区温度大于或等于第二门限值时， 确定当前处于第三环境温度区 段， 并根据所述热区温度触发执行第三子方案。
根据第一方面的第三种可能的实现方式中， 获取冷区温度包括：
按照设定周期从冷区采集点获取温度值；
计算设定时长内的多个温度值的平均值， 作为所述冷区温度。
根据第一方面的第四种可能的实现方式中， 所述冷区采集点为热敏电阻， 串联在电 流源和地线之间， 则从冷区采集点获取冷区温度包括：
获取所述热敏电阻中的电压变化， 并根据电压变化计算所述冷区温度。
第二方面， 本发明实施例提供一种手持电子设备的过热保护装置， 包括： 冷区温度采集模块， 用于从冷区采集点获取冷区温度， 其中， 所述冷区采集点设置 在所述手持电子设备远离发热元件的位置；
过热保护方案选择模块， 用于选择与冷区温度和热区温度对应的过热保护方案。 在第二方面的第一种可能的实现方式中， 过热保护方案选择模块包括：
门限值比较单元， 用于将冷区温度与设定门限值进行比较， 确定当前的环境温度区 段；
方案选择单元， 用于选择与所述环境温度区段和所述热区温度对应的过热保护方 案。
在第二方面的第三种可能的实现方式中， 过热保护方案选择模块包括：
温度区段识别单元， 用于识别所述冷区温度所处的温度区段；
第一子方案触发单元， 用于当识别到所述冷区温度小于或等于第一门限值时， 确定 当前处于第一环境温度区段， 并根据所述热区温度触发执行第一子方案；
第二子方案触发单元，用于当识别到所述冷区温度大于第一门限值且小于或等于第 二门限值时， 确定当前处于第二环境温度区段， 并根据所述热区温度触发执行第二子方 案；
第三子方案触发单元， 用于当识别到所述冷区温度大于或等于第二门限值时， 确定 当前处于第三环境温度区段， 并根据所述热区温度触发执行第三子方案。
第三方面， 本发明实施例提供一种手持电子设备， 包括：
冷区采集点， 设置在所述手持电子设备远离发热元件的位置；
在第三方面的第一种可能的实现方式中， 冷区采集点为热敏电阻， 串联在电流源和 地线之间
本发明实施例提供的手持电子设备的过热保护技术， 通过获取冷区温度， 并考虑冷 区温度来选择过热保护方案， 实现对手持电子设备的过热保护能够综合考虑多点温度， 以解决现有过热保护技术适应性差、 过热保护频繁触发的缺陷。
附图说明 图 1A为本发明实施例一提供的手持电子设备的过热保护方法的流程图； 图 1B为本发明实施例一所适用的冷区温度与过热保护方案对应示意图； 图 2为本发明实施例二提供的手持电子设备的过热保护装置的结构示意图;
图 3为本发明实施例三提供的手持电子设备中冷区热敏电阻的电路原理图。
具体实施方式 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。
实施例一
图 1A为本发明实施例一提供的手持电子设备的过热保护方法的流程图， 本实施例 可适用于对手持电子设备进行过热保护， 该方法可以由手持电子设备的过热保护装置来 执行， 该装置可以通过硬件和 /或软件的形式实现， 集成在手持电子设备之中。 手持电 子设备可以为手机、 平板电脑等任意终端设备。 该方法具体包括如下步骤：
步骤 110、 从冷区采集点获取冷区温度， 其中， 所述冷区采集点设置在所述手持电 子设备远离发热元件的位置；
其中， 发热元件可以是手持电子设备上任意能发热的元件， 通常是主机、 印刷电路 板 （Printed Circuit Board, 简称 PCB) 板等元件。 冷区采集点采集的温度需要体现手 持电子设备所处的环境温度， 所以应该尽量远离发热元件， 避免受到其影响， 能够采集 到较为准确的环境温度。
步骤 120、 选择与冷区温度和热区温度对应的过热保护方案。
其中， 热区温度是通过手持电子设备上的热区采集点采集的温度， 热区采集点一般 与手持电子设备上的发热元件邻近， 监测其温度是否过热。 本实施例中， 过热保护方案 不止一种， 在确定过热保护方案的时候不是单纯考虑热区温度， 而是结合考虑了冷区温 度， 选择合适的过热保护方案。
本实施例的技术方案， 通过从冷区采集点获取冷区温度， 并根据冷区温度和热区温 度选择对应的过热保护方案，解决了现有热保护方案仅考虑单点温度变化而导致过热保 护技术适应性差、 过热保护频繁触发的缺陷。
本实施例的技术方案尤为适用于考虑环境温度对过热保护的影响。本实施例的技术 方案中的冷区温度一般能反映环境温度的水平，在预设的几套热保护方案中选择一套对 应的热保护子方案， 充分考虑到不同温度环境的差异， 不至于在环境温度过高时频繁和 过早地启动限频方案， 造成不愉快的用户体验。 并在监测到环境温度高的使用情形下， 抬高限频的温度门限， 从而达到即使在环境温度较高时， 一些常见的使用场景也能正常 运行。
在上述技术方案的基础上， 获取冷区温度的操作优选是包括如下步骤： 按照设定周 期从冷区采集点获取温度值； 计算设定时长内的多个温度值的平均值， 作为所述冷区温 度。 获取冷区温度的平均值， 能够使冷区温度尽可能接近环境温度。
在上述技术方案的基础上，选择与冷区温度和热区温度对应的过热保护方案优选包 括如下步骤： 将冷区温度与设定门限值进行比较， 确定当前的环境温度区段； 选择与所 述环境温度区段和所述热区温度对应的过热保护方案。该环境温度区段可具体划分为三 个， 即： 首先识别所述冷区温度所处的温度区段； 当识别到所述冷区温度小于或等于第 一门限值时， 确定当前处于第一环境温度区段， 并根据所述热区温度触发执行第一子方 案； 当识别到所述冷区温度大于第一门限值且小于或等于第二门限值时， 确定当前处于 第二环境温度区段， 并根据所述热区温度触发执行第二子方案； 当识别到所述冷区温度 大于或等于第二门限值时， 确定当前处于第三环境温度区段， 并根据所述热区温度触发 执行第三子方案。
例如，将冷区温度 Tcold与预设的第一门限值 tO和第二门限值 t l进行比较后判断 温度区段， 并根据热区传感器（sensor) 的热区温度对预设的几种热保护子方案进行选 择性的调用， 执行第一子方案、 第二子方案或第三子方案。 第二子方案一般是将热区温 度门限向上提高 3-5度， 第三子方案可进一步提高热区温度门限。 对于不同的子方案， 还可同时缩减热保护子方案内循环级数， 即可控制热保护子方案所执行的降低设备功率 以减少温度的措施不同， 循环监测过热温度的周期不同等。 三种子方案与门限值的对应 关系如图 1B本发明实施例一所适用的冷区温度与过热保护方案对应示意图所示。
现有的过热保护技术方案中子方案是唯一的， 不会随着冷区温度变化而变化。 本实 施例的技术方案可以通过冷区温度监测环境温度并结合热区温度在预设的几套热保护 方案中选择一套对应的热保护子方案，可以使手持电子设备更有效的适应温度过高等环 境。
实施例二
图 2为本发明实施例二提供的手持电子设备的过热保护装置的结构示意图，本实施 例的装置，可以用于执行图 1所示本发明实施例一提供的手持电子设备的过热保护方法 的技术方案， 该装置具体包括如下： 冷区温度采集模块 210 和过热保护方案选择模块 220。
其中， 冷区温度采集模块 210， 用于从冷区采集点获取冷区温度， 其中， 所述冷区 采集点设置在所述手持电子设备远离发热元件的位置； 过热保护方案选择模块 220， 用 于选择与冷区温度和热区温度对应的过热保护方案。
在上述基础上， 过热保护方案选择模块 220优选是包括： 门限值比较单元 221和方 案选择单元 222。 其中， 门限值比较单元 221， 用于将冷区温度与设定门限值进行比较， 确定当前的环境温度区段； 方案选择单元 222， 用于选择与所述环境温度和所述热区温 度对应的过热保护方案。 具体的，过热保护方案选择模块可包括：温度区段识别单元、第一子方案触发单元、 第二子方案触发单元和第三子方案触发单元。 其中， 温度区段识别单元， 用于识别所述 冷区温度所处的温度区段； 第一子方案触发单元， 用于当识别到所述冷区温度小于或等 于第一门限值时， 确定当前处于第一环境温度区段， 并根据所述热区温度触发执行第一 子方案； 第二子方案触发单元， 用于当识别到所述冷区温度大于第一门限值且小于或等 于第二门限值时， 确定当前处于第二环境温度区段， 并根据所述热区温度触发执行第二 子方案； 第三子方案触发单元， 用于当识别到所述冷区温度大于或等于第二门限值时， 确定当前处于第三环境温度区段， 并根据所述热区温度触发执行第三子方案。
本实施例用于执行本发明实施例所提供的手持电子设备的过热保护方法的技术方 案， 具备相应的功能模块， 其实现原理和有益效果类似， 此处不再赘述。
在上述技术方案的基础上， 冷区温度采集模块 210可优选为， 负系数热敏电阻， 串 联在恒定电流源和地线之间， 获取所述热敏电阻中的电压变化， 并根据电压变化计算所 述冷区温度。 该方案可以准确测出冷区采集点的即时温度。
在上述技术方案的基础上， 门限值比较单元模块 221， 优选是设置了两个门限值， 即第一门限值 t0和第二门限值 tl， 冷区温度记为 Tcold， 如图 3所示， 当 Tcold t0 时， 根据热区温度执行第一子方案， 当 tO<Tcold tl时， 根据热区温度执行第二子方 案， 当 Tcold^tl时， 根据热区温度执行第三子方案， 如图 1B所示。
通过本方案的预设多种热保护子方案，避免了在环境温度过高时频繁和过早地启动 触发保护动作， 造成不愉快的用户体验。
本发明实施例还提供一种手持电子设备， 该设备包括冷区采集点， 设置在所述手持 电子设备远离发热元件的位置； 还包括本发明任意实施例所提供的手持电子设备的过热 保护装置。 本发明实施例提供的过热保护装置可以采用硬件实现， 但优选是采用软件实 现， 可以为代码或指令集， 配置于手持电子设备的存储器中， 供 CPU等处理器、 控制器 调用执行， 与手持电子设备的其它硬件配合实现过热保护。
该手持电子设备可以完成上述实施例所有功能， 其实现原理和有益效果类似， 此处 不再赘述。
在上述实施例基础上， 冷区采集点优选为热敏电阻 Rl， 串联在电流源和地线之间。 从冷区采集点获取冷区温度， 位于远离主板 （热区） 的一段手持设备壳体内，例如主电 路板连接子板马达的一端或者子板马达上。 相关的配套电路包含： 负系数的热敏电阻及 恒定的电流源， 通过对电压的变化监测计算出对应的温度值。 该手持电子设备上也设置 有热区温度的采集点， 例如温度传感器。温度传感器也可以采用热敏电阻的形式采集温 度。
综上所述的本实施例的技术方案， 通过从冷区采集点获取冷区温度， 并根据冷区温 度和热区温度选择对应的过热保护方案，解决了现有热保护方案不能根据环境温度变化 及环境温度过高时频繁触发保护动作的两个缺陷。本实施例的技术方案通过根据环境温 度的水平， 在预设的几套热保护子方案中选择一套对应的热保护子方案， 充分考虑到不 同温度环境的差异， 不至于在环境温度过高时频繁和过早地启动限频方案， 造成不愉快 的用户体验。 并在监测到环境温度高的使用情形下， 抬高限频的温度门限， 从而达到即 使在环境温度较高时， 一些常见的使用场景也能正常运行。
本领域普通技术人员可以理解： 实现上述各方法实施例的全部或部分步骤可以通过 程序指令相关的硬件来完成。 前述的程序可以存储于一计算机可读取存储介质中。 该程 序在执行时， 执行包括上述各方法实施例的步骤； 而前述的存储介质包括： 醒、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是： 以上实施例仅用以说明本发明的技术方案， 而非对其限制； 尽管 参照前述实施例对本发明进行了详细的说明， 本领域的普通技术人员应当理解： 其依然 可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分技术特征进行等同替 换； 而这些修改或者替换， 并不使相应技术方案的本质脱离本发明各实施例技术方案的 精神和范围。

Claims

权利要求
1、 一种手持电子设备的过热保护方法， 其特征在于， 包括- 从冷区采集点获取冷区温度， 其中， 所述冷区采集点设置在所述手持电子设备远离 发热元件的位置；
选择与冷区温度和热区温度对应的过热保护方案。
2、 根据权利要求 1所述的手持电子设备的过热保护方法， 其特征在于， 选择与冷 区温度和热区温度对应的过热保护方案包括：
将冷区温度与设定门限值进行比较， 确定当前的环境温度区段；
选择与所述环境温度区段和所述热区温度对应的过热保护方案。
3、 根据权利要求 1所述的所述的手持电子设备的过热保护方法， 其特征在于， 选 择与冷区温度和热区温度对应的过热保护方案包括：
识别所述冷区温度所处的温度区段；
当识别到所述冷区温度小于或等于第一门限值时， 确定当前处于第一环境温度区 段， 并根据所述热区温度触发执行第一子方案；
当识别到所述冷区温度大于第一门限值且小于或等于第二门限值时，确定当前处于 第二环境温度区段， 并根据所述热区温度触发执行第二子方案；
当识别到所述冷区温度大于或等于第二门限值时， 确定当前处于第三环境温度区 段， 并根据所述热区温度触发执行第三子方案。
4、 根据权利要求 1-3任一所述的手持电子设备的过热保护方法， 其特征在于， 获 取冷区温度包括：
按照设定周期从冷区采集点获取温度值；
计算设定时长内的多个温度值的平均值， 作为所述冷区温度。
5、 根据权利要求 1-3任一所述的手持电子设备的过热保护方法， 其特征在于， 所 述冷区采集点为热敏电阻， 串联在电流源和地线之间， 则从冷区采集点获取冷区温度包 括- 获取所述热敏电阻中的电压变化， 并根据电压变化计算所述冷区温度。
6、 一种手持电子设备的过热保护装置， 其特征在于， 包括- 冷区温度采集模块， 用于从冷区采集点获取冷区温度， 其中， 所述冷区采集点设置 在所述手持电子设备远离发热元件的位置；
过热保护方案选择模块， 用于选择与冷区温度和热区温度对应的过热保护方案。
7、 根据权利要求 6所述的手持电子设备的过热保护装置， 其特征在于， 过热保护 方案选择模块包括：
门限值比较单元， 用于将冷区温度与设定门限值进行比较， 确定当前的环境温度区 段；
方案选择单元， 用于选择与所述环境温度区段和所述热区温度对应的过热保护方 案。
8、 根据权利要求 6所述的手持电子设备的过热保护装置， 其特征在于， 过热保护 方案选择模块包括：
温度区段识别单元， 用于识别所述冷区温度所处的温度区段；
第一子方案触发单元， 用于当识别到所述冷区温度小于或等于第一门限值时， 确定 当前处于第一环境温度区段， 并根据所述热区温度触发执行第一子方案；
第二子方案触发单元，用于当识别到所述冷区温度大于第一门限值且小于或等于第 二门限值时， 确定当前处于第二环境温度区段， 并根据所述热区温度触发执行第二子方 案；
第三子方案触发单元， 用于当识别到所述冷区温度大于或等于第二门限值时， 确定 当前处于第三环境温度区段， 并根据所述热区温度触发执行第三子方案。
9、 一种手持电子设备， 其特征在于， 包括- 冷区采集点， 设置在所述手持电子设备远离发热元件的位置；
权利要求 6-8任一所述的手持电子设备的过热保护装置。
10、 根据权利要求 9所述的手持电子设备， 其特征在于： 所述冷区采集点为热敏电 阻， 串联在电流源和地线之间。
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