CN114689199B - 实现温度补偿的预测型电子体温计电路结构 - Google Patents
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Abstract
本发明涉及一种实现温度补偿的预测型电子体温计电路结构,包括补偿模块、体温计电路和LCD驱动模块,所述的体温计电路包括测温振荡电路和实测模块,所述的补偿模块和实测模块并联连接在测温振荡电路和LCD驱动模块之间,所述的电路结构分别通过组合逻辑控制开关补偿模块和实测模块的导通和断路,在补偿模块断路的情况下,实测模块导通,输出实际测试的数据;在实测模块断路的情况下,补偿模块导通,输出经过预测补偿的温度值。采用了本发明的实现温度补偿的预测型电子体温计电路结构,具有两套计数***,可以选择实测模式和预测模式两种,方便生产校准。本发明所述的电子体温计具有温度补偿功能,可以实现快速、准确测温功能。
Description
技术领域
本发明涉及电子体温计领域,具体是指一种实现温度补偿的预测型电子体温计电路结构。
背景技术
目前常见的体温计主要有水银体温计、电子体温计以及红外线体温计三种。
水银体温计是一种传统的体温计,价格低廉,使用也比较方便,一般在需要测试的部位,停留5分钟左右,可以取出读数。电子体温计使用时,将体温计放入需要测量的部位,大概半分钟之后,听到蜂鸣报警就可以取出读数。还有红外线体温计,测量的时间更短,一般几秒钟就可以监测到体温,有接触式和非接触式两种。由于红外线体温计价格昂贵携带不方便,因此目前常用的家用体温计主要是水银体温计和电子体温计。
由于水银体温计存在测量时间长;玻璃材质,容易摔碎;摔碎后露出的水银会污染环境,对健康不利等缺点。2007年,欧洲议会通过立法,禁止欧盟各国使用含汞温度计。到2007年底,美国有13个州已经通过立法,禁止使用含汞温度计。水银体温计被淘汰将是必然趋势,电子体温计是取代水银温度计的首选产品。
相比红外线体温计,电子体温计同样存在测量时间略长的缺点,不同品牌所需时间从30秒到3分钟以上不等。测量时间缩短导致的弊端就是测量不准确。
目前的电子体温计产品,当屏幕显示温度在规定的时间内没有变化时,认为温度已经稳定,测量结束并蜂鸣报警。稳定时间可以通过控制引脚的绑定来选择,常见的有4s/8s/16s/32s四种模式。很多商家为了缩短测量时间,达到快速测温的效果,会尽量选择小的稳定时间,这样虽然测量时间缩短,但是测量误差会比较大。
发明内容
本发明的目的是克服了上述现有技术的缺点,提供了一种满足操作简便、快速测温、准确性高的实现温度补偿的预测型电子体温计电路结构。
为了实现上述目的,本发明的实现温度补偿的预测型电子体温计电路结构如下:
该实现温度补偿的预测型电子体温计电路结构,其主要特点是,所述的电路结构包括补偿模块、体温计电路和LCD驱动模块,所述的体温计电路包括测温振荡电路和实测模块,所述的补偿模块和实测模块并联连接在测温振荡电路和LCD驱动模块之间,所述的电路结构分别通过组合逻辑控制开关补偿模块和实测模块的导通和断路,在补偿模块断路的情况下,实测模块导通,输出实际测试的数据;在实测模块断路的情况下,补偿模块导通,输出经过预测补偿的温度值。
较佳地,所述的补偿模块包括温度补偿小数分频器、温度补偿计数器和温度补偿分频系数查找表ROM单元,温度补偿小数分频器的输入端与所述的测温振荡电路相连,温度补偿计数器的输入端与所述的温度补偿小数分频器相连,输出端通过组合逻辑控制开关与所述的LCD驱动模块相连,温度补偿分频系数查找表ROM单元的输入端与所述的温度补偿计数器相连,输出端与所述的温度补偿小数分频器相连。
较佳地,所述的补偿模块统计测量温度与实际温度T之间的误差▽T,计算振荡次数XRS,计算温度增加时增加的震荡次数Nz,通过小数分频器计算分频系数查找表输出Rout,分频系数查找表ROM单元根据当前温度值,输出对应的分频系数至温度补偿小数分频器,分频后输出100个脉冲信号至温度补偿计数器,通过LCD驱动电路显示温度值。
较佳地,所述的测温振荡电路包括脉冲产生控制电路、基准电压REF、温度传感器NTC和电容,所述的基准电压REF和温度传感器NTC均与脉冲产生控制电路并联,基准电压REF和温度传感器NTC的一端相连,且通过电容接地,基准电压REF通过RF与脉冲产生控制电路连接,温度传感器NTC通过RS与脉冲产生控制电路连接,电容通过振荡器SC与脉冲产生控制电路连接。
较佳地,所述的补偿模块计算振荡次数XRS,具体为:
根据以下公式计算振荡次数XRS:
较佳地,所述的补偿模块计算温度增加时增加的震荡次数Nz,具体为:
根据以下公式计算温度增加时增加的震荡次数Nz:
其中,▽T为补偿值,T为实际温度。
较佳地,所述的补偿模块计算分频系数查找表输出Rout,具体为:
根据以下公式计算分频系数查找表输出Rout:
其中,NZ为温度增加时增加的震荡次数。
采用了本发明的实现温度补偿的预测型电子体温计电路结构,是一款实现方式简单、可以快速测温,同时可以根据实测的温度,对于测量误差可以进行补偿的具有预测功能的电子体温计电路。本发明具有两套计数***,可以选择实测模式和预测模式两种,方便生产校准。本发明所述的电子体温计具有温度补偿功能,可以实现快速、准确测温功能。
附图说明
图1为本发明的实现温度补偿的预测型电子体温计电路结构的功能简图。
具体实施方式
为了能够更清楚地描述本发明的技术内容,下面结合具体实施例来进行进一步的描述。
本发明提供实现方式简单、可以快速测温,同时可以根据实测的温度,对于测量误差可以进行补偿的具有预测功能的电子体温计电路,本发明通过双计数器双ROM方式实现温度补偿和实测两种功能,电路的功能简图如图1所示。
本发明在现有电子体温计的基础上,增加了一套分频、计数、查找表ROM模块,实现温度补偿功能。当选择实测模式时,通过组合逻辑控制关闭T2,打开T1,LCD屏幕选择实测模块的数据输出,可用于体温计生产时的温度校准。当选择预测模式时,通过组合逻辑控制关闭T1,打开T2,LCD屏幕选择预测模块的数据输出,显示温度即带有预测补偿的温度值。
本发明的实现温度补偿的预测型电子体温计电路结构,包括补偿模块、体温计电路和LCD驱动模块,所述的体温计电路包括测温振荡电路和实测模块,所述的补偿模块和实测模块并联连接在测温振荡电路和LCD驱动模块之间,所述的电路结构分别通过组合逻辑控制开关补偿模块和实测模块的导通和断路,在补偿模块断路的情况下,实测模块导通,输出实际测试的数据;在实测模块断路的情况下,补偿模块导通,输出经过预测补偿的温度值。
补偿模块包括温度补偿小数分频器、温度补偿计数器和温度补偿分频系数查找表ROM单元,温度补偿小数分频器的输入端与所述的测温振荡电路相连,温度补偿计数器的输入端与所述的温度补偿小数分频器相连,输出端通过组合逻辑控制开关与所述的LCD驱动模块相连,温度补偿分频系数查找表ROM单元的输入端与所述的温度补偿计数器相连,输出端与所述的温度补偿小数分频器相连。
测温振荡电路包括脉冲产生控制电路、基准电压REF、温度传感器NTC和电容,所述的基准电压REF和温度传感器NTC均与脉冲产生控制电路并联,基准电压REF和温度传感器NTC的一端相连,且通过电容接地,基准电压REF通过RF与脉冲产生控制电路连接,温度传感器NTC通过RS与脉冲产生控制电路连接,电容通过振荡器SC与脉冲产生控制电路连接。
本发明的补偿模块的原理如下:
首先根据临床数据,统计出电子体温计测温时,每个测量值与实际温度T之间的误差▽T,其中测量值=实际温度T+▽T,▽T即为补偿值。电子体温计中,已知在每次RS打开时,不同的SC振荡的次数XRS,通过分频系数查找表ROM,会对应不同的温度值。要实现温度补偿功能,可以将振荡次数XRS对应的温度值T改为加上误差补偿的温度值T+▽T,这样当实际温度为T时,LCD屏的显示值是T+▽T。可以通过修改分频系数查找表ROM的输出Rout来实现。
在计算SC振荡的次数XRS时,将XRS对应的温度T改为预测值T+▽T:
随后计算屏幕显示值32℃到43℃(补偿后的温度),温度每增加1℃,RS增加的震荡次数Nz。
公式如下:
再通过小数分频器公式:
计算出新的分频系数查找表输出Rout。
分频系数查找表ROM根据接收到计数器计数到当前的温度值,输出对应的分频系数给小数分频器,小数分频器分频后输出100个脉冲信号给计数器,计数器把每一个脉冲加1,对应显示的温度是0.01℃,再通过LCD驱动电路显示出来。
如果选择XRF=6455,RRF=30KΩ。NTC电阻选择503ET。在起始温度选择32℃(电子体温计在32℃以下显示Lo,不显示温度值),温度补偿值取下表所示值,则加入温度补偿后,Nz的计算值如下:
采用了本发明的实现温度补偿的预测型电子体温计电路结构,是一款实现方式简单、可以快速测温,同时可以根据实测的温度,对于测量误差可以进行补偿的具有预测功能的电子体温计电路。本发明具有两套计数***,可以选择实测模式和预测模式两种,方便生产校准。本发明所述的电子体温计具有温度补偿功能,可以实现快速、准确测温功能。
在此说明书中,本发明已参照其特定的实施例作了描述。但是,很显然仍可以作出各种修改和变换而不背离本发明的精神和范围。因此,说明书和附图应被认为是说明性的而非限制性的。
Claims (6)
1.一种实现温度补偿的预测型电子体温计电路结构,其特征在于,所述的电路结构包括补偿模块、体温计电路和LCD驱动模块,所述的体温计电路包括测温振荡电路和实测模块,所述的补偿模块和实测模块并联连接在测温振荡电路和LCD驱动模块之间,所述的电路结构分别通过组合逻辑控制开关控制补偿模块和实测模块的导通和断路,在补偿模块断路的情况下,实测模块导通,输出实际测试的数据;在实测模块断路的情况下,补偿模块导通,输出经过预测补偿的温度值;
所述的补偿模块包括温度补偿小数分频器、温度补偿计数器和温度补偿分频系数查找表ROM单元,温度补偿小数分频器的输入端与所述的测温振荡电路相连,温度补偿计数器的输入端与所述的温度补偿小数分频器相连,输出端通过组合逻辑控制开关与所述的LCD驱动模块相连,温度补偿分频系数查找表ROM单元的输入端与所述的温度补偿计数器相连,输出端与所述的温度补偿小数分频器相连。
3.根据权利要求1所述的实现温度补偿的预测型电子体温计电路结构,其特征在于,所述的测温振荡电路包括脉冲产生控制电路、基准电压REF、温度传感器NTC和电容,所述的基准电压REF和温度传感器NTC均与脉冲产生控制电路并联,基准电压REF和温度传感器NTC的一端相连,且通过电容接地,基准电压REF通过RF与脉冲产生控制电路连接,温度传感器NTC通过RS与脉冲产生控制电路连接,电容通过振荡器SC与脉冲产生控制电路连接。
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EP21912991.3A EP4113084A4 (en) | 2020-12-29 | 2021-07-02 | CIRCUIT STRUCTURE OF PREDICTIVE TYPE ELECTRONIC BODY TEMPERATURE THERMOMETER IMPLEMENTING TEMPERATURE COMPENSATION |
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US17/918,091 US11976986B2 (en) | 2020-12-29 | 2021-07-02 | Predictive electronic thermometer circuit structure capable of temperature compensation |
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