WO2018053971A1 - 一种测温方法及红外测温计 - Google Patents

一种测温方法及红外测温计 Download PDF

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WO2018053971A1
WO2018053971A1 PCT/CN2016/113266 CN2016113266W WO2018053971A1 WO 2018053971 A1 WO2018053971 A1 WO 2018053971A1 CN 2016113266 W CN2016113266 W CN 2016113266W WO 2018053971 A1 WO2018053971 A1 WO 2018053971A1
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light
infrared thermometer
measured
measurement
measurement window
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杨莲科
罗军
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
    • G01J5/0025—Living bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/0275—Control or determination of height or distance or angle information for sensors or receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/08—Optical arrangements
    • G01J5/0896—Optical arrangements using a light source, e.g. for illuminating a surface

Definitions

  • the invention relates to the technical field of thermometers, in particular to a temperature measuring method and an infrared thermometer.
  • the infrared thermometer consists of an optical system, a photodetector, a signal amplifier, signal processing, and display output.
  • the optical system converges the target infrared radiation energy within its field of view.
  • the size of the field of view is determined by the optical components of the thermometer and their position.
  • the infrared energy is focused on the photodetector and converted into a corresponding electrical signal.
  • the signal passes through the amplifier and the signal processing circuit, and is converted to the temperature value of the measured object after being corrected according to the algorithm of the internal treatment of the instrument and the target emissivity.
  • the existing infrared thermometers basically do not effectively indicate the forehead temperature measurement area, and each measurement requires artificial estimation of the current forehead measurement area and measurement distance. Different areas of the forehead of the human body and different distances, for infrared temperature measurement, the measurement results are different, and the difference between the measurement distance and the measurement part that does not meet the requirements of the infrared thermometer will lead to deviation of the measurement results.
  • the temperature is measured, and the infrared sensing device and the sensing device are activated to measure the voltage source of the heat source thermometer of the object to be tested, and the control circuit board converts the measurement signal from the infrared sensing device and the sensing device, and then calculates The converted temperature and electric field strength show the temperature value on the display device.
  • the spot emitted by the pointing device is mainly used to measure the position, not the precise control of the measuring distance. When the distance is too far, the spot disappears. This is a relatively gradual process, that is, the limit accuracy of the measuring distance. It is relatively bad.
  • a temperature measurement method including the following steps:
  • the infrared thermometer can provide two beams arranged at an angle, so that the two beams illuminate the object before the measurement window;
  • the distance between the infrared thermometer and the object to be measured is readjusted.
  • the temperature measuring method further comprises the step of moving the light spot to a predetermined measurement position of the object to be measured.
  • the angle between the two beams is adjustable.
  • the two light beams respectively illuminate the object to be measured on both sides of the measurement window of the infrared thermometer.
  • an infrared thermometer including a measurement window and two light sources, and the light beams of the two light sources can illuminate the object to be measured before the measurement window at an angle.
  • the two light sources are disposed on both sides of the measurement window.
  • the angle of the light beams of the two light sources is one of 30°, 45°, 60°, and 90°.
  • the two light sources employ light emitting diodes.
  • an infrared thermometer in another aspect, includes a housing, a measurement window, and two light sources.
  • the measurement window is disposed on the housing, and two light sources are disposed on the housing and are located on two sides of the measurement window. Place The light beam of the light source may illuminate the object to be measured before the measurement window at an angle.
  • an infrared thermometer in another aspect, includes a housing, a measurement window, a control module, and two light sources.
  • the measurement window is disposed on the housing
  • the control module is disposed in the housing
  • two light sources are disposed on the
  • the light source is connected to the control module on the two sides of the measuring window, and the light beams of the two light sources can illuminate the object to be measured before the measuring window at an angle.
  • the two beams arranged at an angle are collected into a light spot on the object to be measured in front of the measuring window, so that the measuring distance of the external thermometer can be determined, that is, the correctness is determined.
  • the measurement distance, the light spot is collected on the measured object to ensure that the correct area of the measured object is measured, thus ensuring the accuracy of the temperature measurement.
  • FIG. 1 is a schematic diagram of an infrared thermometer provided by an embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing the state of use of an infrared thermometer according to an embodiment of the present invention
  • thermometer 3 is a schematic diagram of the principle of the infrared thermometer provided by the embodiment of the present invention when the target distance is too close;
  • thermometer 4 is a schematic diagram of the principle of the infrared thermometer provided by the embodiment of the present invention when the target object is too far away;
  • FIG. 5 is a cross-sectional structural view of an infrared thermometer according to an embodiment of the present invention.
  • Embodiments of the present invention provide a temperature measurement method, including the following steps:
  • thermometer with a measurement window
  • the infrared thermometer can provide two beams arranged at an angle so that the two beams illuminate the object to be measured before the measurement window;
  • the light spot is moved to a predetermined measurement position of the object to be measured, and the measurement distance of the infrared thermometer is determined;
  • the distance between the infrared thermometer and the object to be measured is readjusted.
  • the measurement distance of the external thermometer can be determined, that is, the correct measurement distance is determined, and the spot is collected on the object to be measured. It ensures the measurement of the correct area of the measured object, thus ensuring the accuracy of temperature measurement.
  • two The angle of the beam is adjustable.
  • the distance between the light spot and the measurement window of the two beams on the object to be measured is adjusted, and the measurement distance of the infrared thermometer is adjusted to determine the optimal temperature measurement according to different objects to be measured. Distance to ensure accuracy of temperature measurement.
  • the two beams respectively illuminate the object to be measured on both sides of the measurement window of the infrared thermometer.
  • thermometer including a measurement window and two light sources, and the light beams of the two light sources may illuminate the object to be measured before the measurement window at an angle.
  • FIG. 1 is a schematic diagram of an infrared thermometer provided by an embodiment of the present invention
  • FIG. 5 is a cross-sectional structural view of an infrared thermometer provided by an embodiment of the present invention, and referring to FIG. 1 and FIG.
  • the thermometer includes a measurement window 1, a housing 3 and two light sources, which in the present embodiment are light-emitting diodes 2.
  • the measurement window 1 is disposed on the housing 3.
  • the two LEDs 2 are disposed on the housing 3 and are located on both sides of the measurement window 1.
  • the housing is disposed in the housing. There are cavities for accommodating the two LEDs 2, and the two LEDs 2 are arranged in the cavity. As shown in Figure 1 and As shown in FIG.
  • the light beams of the two light-emitting diodes 2 can illuminate the object to be measured before the measurement window 1 at an angle.
  • the measurement distance of the infrared thermometer is determined.
  • the distance between the infrared thermometer and the object to be measured needs to be readjusted.
  • the infrared thermometer further comprises a control module 4, which is disposed in the housing 3, and two LEDs 2 are connected to the control module 4, through which two control modules 4 The opening and closing of the light-emitting diodes 2 and the intensity of the light beams they emit are controlled.
  • the angle between the two light-emitting diodes 2 is one of 30°, 45°, 60°, and 90°, and the difference between the angles of the two light-emitting diodes 2 is different from that of the infrared measuring window 1 . Therefore, the angle between the two light emitting diodes 2 can be set according to the optimal test distance of the object to be tested.
  • different infrared thermometers can be manufactured according to the angle between the two LEDs, for example, four infrared thermometers are manufactured, and the angles of the two internal light-emitting diodes are respectively 30°, 45°, 60°. , 90°. Since the distance from the viewpoint of each infrared thermometer to the measurement window is different, an optimum infrared thermometer can be selected according to the optimal test distance of different objects to be tested.
  • the light-emitting diode 2 can be selected from one of a laser diode, a green light diode or a blue light diode.
  • the light emitting diode 2 is a green photodiode, it is any one of an aluminum gallium phosphide diode, an indium gallium nitride/gallium nitride diode, a gallium phosphide diode, an indium gallium phosphide aluminum diode, and an aluminum gallium phosphide diode.
  • the light emitting diode 2 is a blue light diode, it is a silicon carbide diode or a zinc selenide diode.
  • the bracket in the light-emitting diode 2 is made of a ferrous material, and is sequentially coated with a copper plating layer, a nickel plating layer, and a silver plating layer from the inside to the outside. Copper plating makes the bracket conductive and heat-dissipating; nickel plating can prevent oxidation.
  • the forward voltage of the light-emitting diode 2 is 1.4-1.65V, the current is 1-50mA, and the constant current control is adopted, so that the current can be kept stable and is not easily changed by the VF (Voltage Forward forward voltage). Can extend the life of the LED.
  • the infrared thermometer can also design such a structure.
  • Two light-emitting diodes are disposed on the same side of the infrared measurement window, and the two light-emitting diodes are arranged in front of the infrared measurement window, as long as the light beams of the two light-emitting diodes are collected into a light spot on the object to be measured, It is guaranteed to measure the exact temperature in the correct area.
  • the housing can be modified to mount the two light emitting diodes within the housing.
  • adjusting the angles of the two light-emitting diodes also makes the distances of the light beams condensed by the two light-emitting diodes to the infrared measurement window different, so that the two light-emitting diodes can be set according to the optimal test distance of the object to be tested.
  • the angle of the angle, and then the manufacture of different kinds of infrared thermometers can also choose an optimal infrared thermometer according to the optimal test distance of different objects.
  • light-emitting diodes and laser diodes can be used to form the spot, so that the straight line distance between the spot and the measuring window can be determined, that is, the correct one is determined. The purpose of measuring distance.

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Abstract

一种测温方法及红外测温计，属于温度计领域，通过提供带有测量窗口（1）的红外测温计，红外测温计可提供两呈夹角设置的光束，使两光束照射测量窗口（1）前的被测对象；当两光束于被测对象上汇集成一光点时，便可确定红外测温计的测量距离，继而确定了正确的测量距离，光点在被测对象上汇集就可保证测量到被测对象的正确区域，从而确保了测温的准确性。

Description

一种测温方法及红外测温计 技术领域
本发明涉及温度计技术领域，尤其涉及一种测温方法及红外测温计。
背景技术
红外测温计由光学系统、光电探测器、信号放大器及信号处理、显示输出等部分组成。光学系统汇聚其视场内的目标红外辐射能量，视场的大小由测温仪的光学零件及其位置确定。红外能量聚焦在光电探测器上并转变为相应的电信号。该信号经过放大器和信号处理电路，并按照仪器内疗的算法和目标发射率校正后转变为被测目标的温度值。
现有的红外测温计基本都没有对额头测温区域进行有效的指示，每次测量均需人为估计当前的额头测量区域以及测量距离。人体额头不同的区域以及不同的距离，对于红外测温来说，测量结果均有一定差异，不符合红外测温计要求的测量距离与测量部位的差异，将会导致测量结果的偏差。
申请日为2010.04.13，公开号为CN201662440U的中国实用新型专利，公开了这样一种多功能红外线温度计，其壳体的前端设置有一指向装置，该指向装置发出一光点至待测物体表面的温度测量位置，并启动红外感测装置及感应装置进行该待测物体的热源温度计电压电场的测量，并供控制电路板对来自红外感测装置及感应装置的量测信号进行转换计算，再依据所换算出的温度及电场强度，于显示装置上显示出温度值。这一指向装置发出的光点主要是用于测量位置的指示，而非测量距离的精确控制，距离过远时光点消失，这是一个比较渐变的过程，也就是说，对于测量距离的限制精度是比较差的。
发明内容
本发明的目的在于提供一种可准确确定测量距离和测量范围的测温方法及红外测温计。
为达此目的，本发明采用以下技术方案：
一方面，提供一种测温方法，包括如下步骤：
提供带有测量窗口的红外测温计，所述红外测温计可提供两呈夹角设置的光束，使两所述光束照射所述测量窗口前的被测对象；
调整所述红外测温计与所述被测对象的距离；
当两所述光束于所述被测对象上汇集成一光点时，确定所述红外测温计的测量距离；
当两所述光束未于所述被测对象上汇集成光点时，重新调整所述红外测温计与所述被测对象的距离。
作为优选，所述测温方法，还包括步骤：将所述光点移至所述被测对象的预定测量位置。
作为优选，两所述光束的夹角可调。
作为优选，两所述光束分别于所述红外测温计的测量窗口的两侧照射被测对象。
另一方面，提供一种红外测温计，包括测量窗口和两光源，两所述光源的光束可呈夹角照射所述测量窗口前的被测对象。
作为优选，两所述光源设置于所述测量窗口的两侧。
作为优选，两所述光源的光束夹角为30°、45°、60°、90°中的一种。
作为优选，两所述光源采用发光二极管。
再一方面提供一种红外测温计，包括壳体、测量窗口和两光源，测量窗口设置于所述壳体上，两光源设置于所述壳体上并位于所述测量窗口两侧，两所 述光源的光束可呈夹角照射所述测量窗口前的被测对象。
又一方面，提供一种红外测温计，包括壳体、测量窗口、控制模块和两光源，测量窗口设置于所述壳体上，控制模块设置在所述壳体内，两光源设置于所述壳体上并位于所述测量窗口两侧，两所述光源与所述控制模块连接，两所述光源的光束可呈夹角照射所述测量窗口前的被测对象。
本发明所提供的测温方法及红外测温计，两呈夹角设置的光束在测量窗口前的被测对象上汇集成一光点，因此能够确定外测温计的测量距离，即确定了正确的测量距离，光点在被测对象上汇集就可保证测量到被测对象正确区域，从而确保了测温的准确性。
附图说明
图1是本发明实施例所提供的红外测温计的原理图；
图2是本发明实施例所提供的红外测温计的使用状态原理图；
图3是本发明实施例所提供的红外测温计在使用时目标物距离过近时的原理示意图；
图4是本发明实施例所提供的红外测温计在使用时目标物距离过远时的原理示意图；
图5是本发明实施例所提供的红外测温计的剖视结构图。
图中：1-红外测温窗口、2-发光二极管、3-壳体、控制模块-4。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
本发明的实施例提供一种测温方法，包括如下步骤：
提供带有测量窗口的红外测温计，红外测温计可提供两呈夹角设置的光束，使两光束照射测量窗口前的被测对象；
调整红外测温计与被测对象的距离；
当两光束于被测对象上汇集成一光点时，将光点移至被测对象的预定测量位置，确定红外测温计的测量距离；
当两光束未于被测对象上汇集成光点时，重新调整红外测温计与被测对象的距离。
由于两呈夹角设置的光束在测量窗口前的被测对象上汇集成一光点，因此能够确定外测温计的测量距离，即确定了正确的测量距离，光点在被测对象上汇集就可保证测量到被测对象正确区域，从而确保了测温的准确性。
因为不同的被测对象具有不同的属性，从而使得被测对象的最佳测温距离有所不同，为了适应这一情况，于是，在利用上述测温方法对被测对象进行测温时，两光束的夹角可调。通过调节这两光束的夹角，以便调整两光束在被测对象上汇集成的光点与测量窗口的距离，进而调整红外测温计的测量距离，以便根据不同被测对象确定最佳测温距离，以确保测温的准确性。为了便于调节这两光束的夹角，所以，两光束分别于红外测温计的测量窗口的两侧照射被测对象。
为了实施上述测温方法，因此，需设计这样一种红外测温计，其包括测量窗口和两光源，两所述光源的光束可呈夹角照射所述测量窗口前的被测对象。
图1是本发明实施例所提供的红外测温计的原理图；图5是本发明实施例所提供的红外测温计的剖视结构图，请参考图1和图5，本示例中红外测温计包括测量窗口1、壳体3和两光源，在本实施例中这两光源为发光二极管2。如图5所示，测量窗口1设置于壳体3上，两发光二极管2设置于壳体3上并位于测量窗口1两侧，为了便于防止和安装这两个发光二极管2，在壳体内设置有容置这两个发光二极管2的空腔，将这两个发光二极管2设置在空腔内。如图1和 图5所示，两发光二极管2的光束可呈夹角照射测量窗口1前的被测对象。如图2所示，当两个发光二极管2的光束于被测对象上汇集成一光点时，变确定了红外测温计的测量距离。如图3和图4所示，当两个发光二极管2的光束未于被测对象上汇集成光点时，则需要重新调整红外测温计与被测对象的距离。
如图5所示，该红外测温计还包括控制模块4，该控制模块4设置在所述壳体3内，两个发光二极管2与控制模块4连接，通过这一控制模块4对两个发光二极管2的开闭以及它们发出的光束的强度加以控制。
两发光二极管2的夹角为30°、45°、60°、90°中的一种，夹角的不同使得两发光二极管2发出的光束汇聚后的光点至红外测量窗口1的距离不同，从而可根据被测对象的最佳测试距离来设定两发光二极管2的夹角。如此，可根据两发光二极管2夹角的不同，制造不同的红外测温计，例如制造四种红外测温计，它们各自内部的两发光二极管的夹角分别为30°、45°、60°、90°。由于每种红外测温计汇聚出的观点至测量窗口的距离不同，于是，可根据不同被测对象的最佳测试距离来选用一种最适宜的红外测温计。
为了确保两发光二极管2发出的光束汇聚后产生的光点清晰可辨，于是发光二极管2可选用激光二极管、绿光二极管或蓝光二极管中的一种。当发光二极管2为绿光二极管时，其为铝磷化镓二极管、铟氮化镓/氮化镓二极管、磷化镓二极管、磷化铟镓铝二极管、铝磷化镓二极管中的任一种。
当发光二极管2为蓝光二极管时，其为碳化硅二极管或硒化锌二极管。
在本实施例了中，发光二极管2中的支架为铁质材料制成，由内向外依次包覆有镀铜层、镀镍层和镀银层。镀铜使支架导电性好，散热快；镀镍可防氧化。发光二极管2的正向电压为1.4-1.65V，电流1-50mA，并采用恒流控制，如此可以保持电流的稳定，不易受VF(Voltage Forward正向电压)的变化， 可以延长发光二极管的使用寿命。
红外测温计除了采用上述结构外，还可以设计这样一种结构。将两个发光二极管设置在红外测量窗口的同一侧，这两个发光二极管在红外测量窗口前依次排列，只要能使得这两个发光二极管的光束在被测对象上汇集成光点即可，同样可保证测量到正确区域的准确温度。为了便于安置这两个发光二极管，可对壳体加以改造，以便将这两个发光二极管安装在壳体内。另外，调整这两个发光二极管的夹角，同样使得两发光二极管发出的光束汇聚后的光点至红外测量窗口的距离不同，从而可根据被测对象的最佳测试距离来设定两发光二极管的夹角，进而制造不同种的红外测温计，同样可根据不同被测对象的最佳测试距离来选用一种最适宜的红外测温计。
再有，除了采用发光二极管、激光二极管来形成汇聚后的光点外，也可选用其他发光光源来形成光点，从而达到光点和测量窗口之间的直线距离可定，即确定了正确的测量距离的目的。
显然，本发明的上述实施例仅仅是为了清楚说明本发明所作的举例，而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明权利要求的保护范围之内。

Claims (10)

  1. 一种测温方法，其特征在于，包括如下步骤：
    提供带有测量窗口的红外测温计，所述红外测温计可提供两呈夹角设置的光束，使两所述光束照射所述测量窗口前的被测对象；
    调整所述红外测温计与所述被测对象的距离；
    当两所述光束于所述被测对象上汇集成一光点时，确定所述红外测温计的测量距离；
    当两所述光束未于所述被测对象上汇集成光点时，重新调整所述红外测温计与所述被测对象的距离。
  2. 根据权利要求1所述的测温方法，其特征在于：还包括步骤：将所述光点移至所述被测对象的预定测量位置。
  3. 根据权利要求1所述的测温方法，其特征在于：两所述光束的夹角可调。
  4. 根据权利要求1所述的测温方法，其特征在于：两所述光束分别于所述红外测温计的测量窗口的两侧照射被测对象。
  5. 一种红外测温计，包括测量窗口，其特征在于，还包括两光源，两所述光源的光束可呈夹角照射所述测量窗口前的被测对象。
  6. 根据权利要求5所述的红外测温计，其特征在于，两所述光源设置于所述测量窗口的两侧。
  7. 根据权利要求5所述的红外测温计，其特征在于，两所述光源的光束夹角为30°、45°、60°、90°中的一种。
  8. 根据权利要求5所述的红外测温计，其特征在于，两所述光源采用发光二极管。
  9. 一种红外测温计，包括壳体，于所述壳体上设置测量窗口，其特征在于，还包括设置于所述壳体上并位于所述测量窗口两侧的两光源，两所述光源的光 束可呈夹角照射所述测量窗口前的被测对象。
  10. 一种红外测温计，包括壳体，于所述壳体上设置测量窗口，所述壳体内设置有控制模块，其特征在于，还包括设置于所述壳体上并位于所述测量窗口两侧的两光源，所述光源与所述控制模块连接，两所述光源的光束可呈夹角照射所述测量窗口前的被测对象。
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