PATENT CLAIM ANALYSIS

Application Number: 15968758
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["250", "252100"]

Abstract:
A system for testing thermal response time of an uncooled infrared focal plane detector array and a method therefor is provided. The system comprises: a blackbody, a chopper, a detector unit under test and a testing system. The method comprises: emitting radiation by the blackbody, chopping by the chopper, then radiating the radiation to the uncooled infrared focal plane detector array under test; generating different responses on the radiation at different chopping frequencies by the uncooled infrared focal plane detector array under test; collecting different response values of the uncooled infrared focal plane detector array under test at different chopping frequencies; obtaining response amplitude at a corresponding frequency in a frequency domain by FFT; fitting according to a formula Rv  ( f ) = Rv  ( 0 ) 1 + ( 2  π   f   τ ) 2 to obtain the thermal response time.

Claim (Index 5):
The method for testing the thermal response time of the uncooled infrared focal plane detector array, as recited in  claim 4 , comprising steps of:\n step (1): measuring DC response of the detector after the detector unit under test is stably powered on, setting a frame frequency of the detector unit to be 50 Hz; covering the detector unit completely with an object at a normal temperature, detecting and recording an output V L  of the detector unit at a first moment; denoting a radiating temperature of the blackbody as T, wherein T is higher than a normal temperature; when the radiating temperature of the blackbody is stable, the detector unit under test is aligned with the blackbody, detecting and recording an output V 0  of the detector unit at a second moment; in order to prevent that the blackbody is not capable of radiating on all array of the detector, getting M\u00d7N pixels from a central zone of a plane array to calculate an average value, V L _ = \u2211 i = 1 M \ue89e \u2211 j = 1 N \ue89e V L \ue8a0 ( i , j ) M \u00d7 N , V 0 _ = \u2211 i = 1 M \ue89e \u2211 j = 1 N \ue89e V 0 \ue8a0 ( i , j ) M \u00d7 N ; calculating the DC response of the detector unit Rv= V 0 \u2212 V L ;\n step (2) measuring response of the detector under different chopping frequencies \n denoting a working frequency of the detector unit under test as f 0  Hz; chopping radiation outputted by the blackbody with the chopper; wherein a chopping frequency of the chopper is not higher than \n f 0 2 \ue89e Hz ; , collecting data outputted by the detector unit under different chopping frequencies; continuously collecting N*f frames in each group, wherein N\u22652; performing Fast Fourier Transform (FFT) on the data under different chopping frequencies, so as to obtain a response amplitude V f  under a corresponding frequency in a frequency domain; selecting M\u00d7N pixels in an identical area of the step (1) to calculate an average value, V f _ = \u2211 i = 1 M \ue89e \u2211 j = 1 N \ue89e V f \ue8a0 ( i , j ) M \u00d7 N ; calculating a response of the detector unit under different chopping frequencies, Rv(f)= V f \u2212 V L ;\n step (3) fitting curve according to a formula \n Rv \ue8a0 ( f ) = Rv \ue8a0 ( 0 ) 1 + ( 2 \ue89e \u03c0 \ue89e \ue89e f \ue89e \ue89e \u03c4 ) 2 to calculate a thermal response time \u03c4;\n according to the Rv(f) measured and calculated under different frequencies f in the step (2); taking Rv(0) and \u03c4 as unknown parameters, fitting curve according to a formula \n Rv \ue8a0 ( f ) = Rv \ue8a0 ( 0 ) 1 + ( 2 \ue89e \u03c0 \ue89e \ue89e f \ue89e \ue89e \u03c4 ) 2 to calculate the thermal response time \u03c4; taking a DC response Rv of the detector unit as an initial value of Rv(0) while fitting.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 93.0
- Lexical Diversity: 2.26389
- Patent Class: 250.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16318897', '12799629', '12799626', '10567438', '11606880']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7065239192201171
- 35 USC 102 Novelty (BERT): 0.4829392044960754
- Combined Prediction Score: 0.684165447747713
- Mean Citation Score: 183.093118
- Max Citation Score: 187.41916
- Similarity Product: 128.42585971720695

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test