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公开(公告)号：US4790669A
公开(公告)日：1988-12-13
申请号：US849435
申请日：1986-04-08
Applicant: Douglas A. Christensen
Inventor： Douglas A. Christensen
Abstract: Apparatus and method for optically measuring temperature by spectroscopically determining the temperature-induced changes in the wavelength spectrum of light interacting with a semiconductor temperature sensor. The method includes providing illumination from a radiant energy source with a broad wavelength spectrum, guiding the radiant energy to a remote semiconductor sensor, returning the radiant energy after interaction with the semiconductor sensor, and analyzing the returned wavelength spectrum to determine the temperature-induced spectral changes due to the absorption edge of the semiconductor sensor. One embodiment of the invention comprises a quartz-halogen lamp, an optical multiplexer, optical fiber lightguides, a gallium arsenide semiconductor sensor, a fast scan spectrometer, an analog to digital converter and a microprocessor for processing the information of the returned wavelength spectrum for determining and displaying the sensor temperature.
Abstract translation: 通过光谱测定与半导体温度传感器相互作用的光的波长光谱的温度诱导变化来光学测量温度的装置和方法。 该方法包括从具有宽波长光谱的辐射能源提供照明，将辐射能引导到远程半导体传感器，在与半导体传感器相互作用之后返回辐射能，并分析返回的波长光谱以确定温度诱导光谱 由于半导体传感器的吸收边缘而导致的变化。 本发明的一个实施例包括石英卤素灯，光复用器，光纤光导，砷化镓半导体传感器，快速扫描光谱仪，模数转换器和微处理器，用于处理返回的波长谱的信息以确定 并显示传感器温度。
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52.发明授权Optical fiber apparatus and method for remotely measuring an external parameter from a monitoring position 失效用于从监视位置远程测量外部参数的光纤装置和方法
公开(公告)号：US4713538A
公开(公告)日：1987-12-15
申请号：US681852
申请日：1984-12-12
Applicant: Evangelos Theocharous
Inventor： Evangelos Theocharous
IPC: G01D5/353 , G01B11/00 , G01D5/26 , G01D21/00 , G01K11/12 , G01K11/14 , G02B6/00 , G08C23/06 , G01D5/34
Abstract: An optical fiber apparatus measures an external parameter, such as temperature, at any of a number of different locations using time-domain reflectometry techniques. Sensor devices, each comprising a chip or plate of ruby glass, are interconnected by optical fibers. A laser launches along the fiber string short pulses of light at a first wavelength on the absorption edge of the ruby glass and a second wavelength in the transmission region away from the edge. A timer controls sampling circuits to measure backscattered energy at each wavelength at spaced times corresponding to spaced points along the fiber on opposite sides of a selected sensor device. A processor calculates the absorption loss in the sensor device at each wavelength by comparing the backscattered energy from the two points on opposite sides of the device, and calculates the differential absorption loss by comparing the losses at the two wavelengths. Embodiments employing a wedge shaped absorber are used to measure displacement. Signal to noise ratio is improved by incorporating retroreflectors in the fiber lengths between sensor devices.
Abstract translation: PCT No.PCT / GB84 / 00136 Sec。 371日期1984年12月12日 102（e）日期1984年12月12日PCT提交1984年4月19日PCT公布。 公开号WO84 / 04439 日期1984年11月8日。光纤设备使用时域反射测量技术测量多个不同位置中的任何一个的外部参数，例如温度。 每个包含红宝石玻璃的芯片或板的传感器装置通过光纤互连。 激光沿着光纤串在红宝石玻璃的吸收边缘上以第一波长的短脉冲光发射，并且在远离边缘的透射区域中发射第二波长。 定时器控制采样电路，以在对应于沿着选定传感器装置的相对侧上的光纤的间隔点的间隔时间测量每个波长的反向散射能量。 处理器通过比较来自装置两侧的两个点的反向散射能量来计算每个波长的传感器装置中的吸收损耗，并通过比较两个波长的损耗来计算差分吸收损耗。 使用楔形吸收器的实施例用于测量位移。 通过在传感器设备之间的光纤长度中并入后向反射器来提高信噪比。
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公开(公告)号：US4689483A
公开(公告)日：1987-08-25
申请号：US727354
申请日：1985-04-25
Applicant: Ervin Weinberger
Inventor： Ervin Weinberger
CPC classification number: G01K11/14
Abstract: A fiber optical measuring apparatus in accordance with the invention utilizes the thermal shift of the absorption edge in doped insulators such as colored glass filters. A radiant energy source is operable in a first, normal mode for temperature measurement, and is selectively operable in a second mode for calibration purposes. In the first mode, the source emits light at a wavelength extending into the absorption edge, and in the second mode emits light at a wavelength removed from the absorption edge and at which transmission of the light through the sensing element is not affected by temperature shift. A reference photodetector coupled to the radiant energy source to receive light directly therefrom provides a correcting signal to correct for variations in source intensity. Means are provided for compensation for variations in the temperature of the source.
Abstract translation: 根据本发明的光纤测量装置利用诸如彩色玻璃滤光片的掺杂绝缘体中的吸收边缘的热移动。 辐射能源可以在用于温度测量的第一正常模式中操作，并且在第二模式中可选择性地操作用于校准目的。 在第一模式中，源发射延伸到吸收边缘的波长的光，并且在第二模式中以从吸收边缘去除的波长发射光，并且通过感测元件的光的透射不受温度偏移的影响 。 耦合到辐射能源以从其直接接收光的参考光电检测器提供校正信号以校正源强度的变化。 提供用于补偿源的温度变化的装置。
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公开(公告)号：US20250053767A1
公开(公告)日：2025-02-13
申请号：US18808968
申请日：2024-08-19
Applicant: Varcode Ltd.
Inventor： Yaron Nemet , Ephraim Brand , Ahmed M. Tafesh
Abstract: A quality management system for products including a multiplicity of barcoded quality indicators, a barcode indicator reader and a product type responsive indication interpreter, each of the barcoded quality indicators including a first barcode including at least one first colorable area, the first barcode being machine-readable before exceedance of the at least one time and temperature threshold, at least a second barcode including at least one second colorable area, the second barcode not being machine-readable before exceedance of the at least one time and temperature threshold, a coloring agent located at a first location on the indicator and a coloring agent pathway operative to allow the coloring agent to move, from the first location to the first and second colorable areas simultaneously thereby causing the first barcode to become unreadable and at the same time causing the second barcode to become machine-readable.
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公开(公告)号：US20230419068A1
公开(公告)日：2023-12-28
申请号：US18345219
申请日：2023-06-30
Applicant: Varcode Ltd.
Inventor： Yaron Nemet , Ephraim Brand , Ahmed M. Tafesh
CPC classification number: G06K19/06046 , G06Q30/06 , G01K3/10 , G01K11/14 , G06K19/0615 , G01D7/00 , G06K19/06028 , G06K19/0614 , G01D7/005 , G06Q10/087 , G06K7/1413 , G06K7/1417 , G06K19/06037
Abstract: A quality management system for products including a multiplicity of barcoded quality indicators, a barcode indicator reader and a product type responsive indication interpreter, each of the barcoded quality indicators including a first barcode including at least one first colorable area, the first barcode being machine-readable before exceedance of the at least one time and temperature threshold, at least a second barcode including at least one second colorable area, the second barcode not being machine-readable before exceedance of the at least one time and temperature threshold, a coloring agent located at a first location on the indicator and a coloring agent pathway operative to allow the coloring agent to move, from the first location to the first and second colorable areas simultaneously thereby causing the first barcode to become unreadable and at the same time causing the second barcode to become machine-readable.
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Patent Agency Ranking
56.发明公开公开(公告)号：US20230416948A1
公开(公告)日：2023-12-28
申请号：US17994871
申请日：2022-11-28
Applicant: Hyundai Motor Company , Kia Corporation , INDUSTRIAL COOPERATION FOUNDATION JEONBUK NATIONAL UNIVERSITY
Inventor： Hong Chan JEON , Sung June PARK , Min Jae CHOE , Dong Ho SIN
Abstract: The present disclosure relates to a composite fiber capable of discoloration, and more particularly, to a composite fiber capable of discoloration by various external stimuli such as heat, electrical signals, mechanical external stimuli, etc. by filling a hollow of an elastic hollow fiber containing a thermochromic pigment and an elastic polymer with a liquid metal, and a manufacturing method thereof. The composite fiber capable of discoloration according to the present disclosure includes: a hollow fiber containing a thermochromic pigment and an elastic polymer, a liquid metal filled in the hollow of the elastic hollow fiber, a metal wire having one end inserted into the liquid metal and the other end exposed to the outside, and a stopper connected to seal the end of the elastic hollow fiber.
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公开(公告)号：US11449724B2
公开(公告)日：2022-09-20
申请号：US17493026
申请日：2021-10-04
Applicant: Varcode Ltd.
Inventor： Yaron Nemet , Ephraim Brand , Ahmed M. Tafesh
Abstract: A quality management system for products including a multiplicity of barcoded quality indicators, a barcode indicator reader and a product type responsive indication interpreter, each of the barcoded quality indicators including a first barcode including at least one first colorable area, the first barcode being machine-readable before exceedance of the at least one time and temperature threshold, at least a second barcode including at least one second colorable area, the second barcode not being machine-readable before exceedance of the at least one time and temperature threshold, a coloring agent located at a first location on the indicator and a coloring agent pathway operative to allow the coloring agent to move, from the first location to the first and second colorable areas simultaneously thereby causing the first barcode to become unreadable and at the same time causing the second barcode to become machine-readable.
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公开(公告)号：US11441040B2
公开(公告)日：2022-09-13
申请号：US16605761
申请日：2017-04-21
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： David H Hanes
Abstract: The present disclosure is drawn to an electronic device housing that can include a heat sensitive coating and a second heat sensitive coating applied to an electronic device housing. The heat sensitive coating or portion thereof can include a thermochromatic colorant having a color-changing activation temperature, and the second heat sensitive coating or portion thereof can include a second thermochromatic colorant having a second color-changing activation temperature. The color-changing activation temperature can be a temperature from 30° C. to about 100° C., and the second color-changing activation temperature can be at least 5° C. greater than the color-changing activation temperature.
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公开(公告)号：US11341387B2
公开(公告)日：2022-05-24
申请号：US17134946
申请日：2020-12-28
Applicant: Varcode Ltd.
Inventor： Yaron Nemet , Ephraim Brand
Abstract: A barcoded indicator operative to provide a machine-readable indication of exceedance of at least one threshold by at least one product quality affecting parameter, the barcoded indicator including at least a first barcode and at least a second barcode, the at least a second barcode being in a second barcode unreadable state prior to exceedance of the at least one threshold and upon exceedance of the at least one threshold the at least a first barcode becoming unreadable and generally simultaneously the at least a second barcode becoming readable.
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公开(公告)号：US20220092373A1
公开(公告)日：2022-03-24
申请号：US17493026
申请日：2021-10-04
Applicant: Varcode Ltd.
Inventor： Yaron Nemet , Ephraim Brand , Ahmed M. Tafesh
Abstract: A quality management system for products including a multiplicity of barcoded quality indicators, a barcode indicator reader and a product type responsive indication interpreter, each of the barcoded quality indicators including a first barcode including at least one first colorable area, the first barcode being machine-readable before exceedance of the at least one time and temperature threshold, at least a second barcode including at least one second colorable area, the second barcode not being machine-readable before exceedance of the at least one time and temperature threshold, a coloring agent located at a first location on the indicator and a coloring agent pathway operative to allow the coloring agent to move, from the first location to the first and second colorable areas simultaneously thereby causing the first barcode to become unreadable and at the same time causing the second barcode to become machine-readable.
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