CN105181129B

CN105181129B - A kind of controlled in wireless low-light detection method based on highly sensitive photodetector

Info

Publication number: CN105181129B
Application number: CN201510491085.2A
Authority: CN
Inventors: 王明甲; 郭方敏
Original assignee: East China Normal University
Current assignee: East China Normal University
Priority date: 2015-08-12
Filing date: 2015-08-12
Publication date: 2017-03-29
Anticipated expiration: 2035-08-12
Also published as: CN105181129A

Abstract

The invention discloses a kind of controlled in wireless low-light detection method based on highly sensitive photodetector, it is characterized in the low-light test system using Bluetooth control laser end and embedded data acquisition unit, realize the low-light detection of controlled in wireless, on an off control low-light radiating light source of the Bluetooth control laser end by electric aperture；After data conversion of the embedded data acquisition unit by A/D converter by reading circuit, Jing FIFO memorizeies access arm processor, and test data is carried out wireless transmission by WIFI module.The present invention has compared with prior art by bluetooth and WIFI functions, can change outside darkroom has light and no light condition and carries out wireless data reading by WIFI, reduce the impact that LCD screen optical signal and tester's heat radiation etc. bring when low-light is detected in darkroom, so that test more accurately, is conducive to promoting photodetector in the extensive application of low-light low irradiance field of detecting.

Description

A kind of controlled in wireless low-light detection method based on highly sensitive photodetector

Technical field

The present invention relates to technical field of photoelectric detection, specifically a kind of wireless controlled based on highly sensitive photodetector Low-light detection method processed.

Background technology

Fainter light detector is applied in the various fields such as military surveillance, lll night vision imaging, biomedical and fluorescence Raman It is quite varied.Test in the case of low level light signal, background signal are most important because in the case of low-light, background signal it is big Can the little low-light and the accuracy of test of detecting on photodetector affect very big.

The patent No.：ZL201110356317.5 《A kind of micro light detecting method of covering visible light wave band》, disclose one kind The method of low-light detection, the low-light detection need people in test site, manually complete unglazed and have two kinds of operations of illumination, grasp every time Need to open camera bellows, easily cause laser offset, so as to affect measurement result.

The low-light test system of prior art, is easily subject to the optical signal in LCD screen and test when low-light is detected in darkroom The thermal-radiating impact of people, accuracy are have impact on and photo-detector are further studied and explored than relatively low, constrain significantly optical detection Extensive application of the device in low-light low irradiance field.

The content of the invention

The purpose of the present invention is a kind of nothing based on highly sensitive photodetector provided for the deficiencies in the prior art Line traffic control low-light detection method, using Bluetooth control laser technology and the Embedded data acquisition system of WIFI functions, in darkroom The low-light detection of controlled in wireless is carried out outward, LCD screen glazing and tester when darkroom reads is effectively reduced and is walked about the shadow for bringing Ring so that test is more accurately, easy to operate, micro light detecting accuracy is high, meets different components and signal magnitude is expansible Needs, be conducive to promote photodetector low-light low irradiance field of detecting extensive application, to further research, exploitation Micro light detecting has and its significance.

The object of the present invention is achieved like this：A kind of controlled in wireless low-light detection side based on highly sensitive photodetector Method, it is including the low-light test system being made up of low-light radiating light source, optic test platform, photodetector and reading circuit, micro- Light radiation light source is by laser instrument and decay disk, optical filter and speculum group into, optic test platform by the first Amici prism and the Two Amici prisms and microcobjective composition, are characterized in the system using Bluetooth control laser end and embedded data acquisition list Unit, realizes the low-light detection of controlled in wireless, and the Bluetooth control laser end is by bluetooth communication module, single-chip microcomputer and electric aperture group Into electric aperture is arranged on laser instrument and by the opening and closing of Single-chip Controlling laser；The embedded data acquisition list Unit is made up of the arm processor being connected with FPGA module, WIFI module, FIFO memorizeies and A/D converter respectively, and A/D turns Parallel operation is connected with FIFO memorizeies；The reading circuit is connected with FPGA module and A/D converter, will be read by A/D converter After the data conversion of circuit, Jing FIFO memorizeies access arm processor, and wirelessly send out test data by WIFI module Send.

The present invention has convenient test compared with prior art, and accuracy is good, and tester changes without opening black box Change has light and unglazed operating condition, and need not read data in darkroom, by bluetooth and WIFI functions, so that it may in darkroom Outer change has light and no light condition and carries out wireless data reading by WIFI, LCD when reduce inter alia low-light detection in darkroom The impact that screen optical signal and tester's heat radiation etc. bring so that test more accurately, is conducive to promoting photodetector to exist The extensive application of low-light low irradiance field of detecting.

Description of the drawings

Fig. 1 is low-light test system structure schematic diagram of the present invention；

Fig. 2 is Bluetooth control laser end structure schematic diagram；

Fig. 3 is embedded data acquisition unit and photodetector and reading circuit structure schematic diagram；

Fig. 4 is embodiment of the present invention figure.

Specific embodiment

Refering to accompanying drawing 1, the present invention by low-light radiating light source 1, optic test platform 2, photodetector 3, reading circuit 4, Embedded data acquisition unit 5 and Bluetooth control laser end 6 constitute；The low-light radiating light source 1 is by laser instrument 11 and decay disk 12nd, optical filter 13 and reflecting mirror 14 are constituted；The optic test platform 2 by the first Amici prism 21 and the second Amici prism 22 and Microcobjective 23 is constituted.

Refering to accompanying drawing 2, the Bluetooth control laser end 6 is by 63 groups of bluetooth communication module 61, single-chip microcomputer 62 and electric aperture Into electric aperture 63 is arranged on laser instrument 11 and the opening and closing of laser are controlled by single-chip microcomputer 62.

Refering to accompanying drawing 3, the embedded data acquisition unit 5 by respectively with FPGA module 52, WIFI module 53, FIFO The arm processor 51 of memorizer 54 and the connection of A/D converter 55 is constituted, and A/D converter 55 is connected with FIFO memorizeies 54； The reading circuit 4 is connected with FPGA module 52 and ADC analog-to-digital conversions device 55, by ADC analog-to-digital conversions device 55 by reading circuit 4 After data conversion, Jing FIFO memorizeies 54 access arm processor 51, and wirelessly send out test data by WIFI module 53 Send；The arm processor 51 is provided with USB interface 56.

Refering to accompanying drawing 4, the present invention is so used：Photodetector 3 and reading circuit 4 are docked at into a substrate Go up and be welded in Dewar flask 7, to reduce external electromagnetic interference, will the low-light radiant light at Bluetooth control laser end 6 be set then Source 1, optic test platform 2, and the Dewar flask 7 that is arranged on micropositioner 8 be placed in black box 21, in order to reduce extraneous background The impact of light, is covered with black cloth outside black box 21, and embedded data acquisition unit 5 is arranged on outside black box 21, and by data wire It is connected with reading circuit 4.Black box 21 be externally provided be connected with reflecting mirror 14 light power meter 12, and the first Amici prism 21 connection White light 12 and industrial television surveillance system device 9 and LCD display 10 are sequentially connected in series with the second Amici prism 22.

Bluetooth control laser end 6 is sent using the Bluetooth function of mobile phone and ordered, Bluetooth control laser end 6 is logical by bluetooth News module 61 receives order, performs order output by single-chip microcomputer 62, and control electric aperture 63 is opened and closed, so as to control low-light Radiating light source 1 has light and unglazed, can show that laser impinges upon the position of photodetector 3, and lead in LCD display 10 Overregulating micropositioner 8 guarantees laser facula irradiation on the pixel of photodetector 3, and reading circuit is produced in FPGA module 52 Under clock signal drives, series read-out is carried out to the data of photodetector 3 successively, 4 SOD serial output data of reading circuit is by ARM The A/D converter 55 of the control of processor 51 is sent by WIFI module 53 after carrying out analog digital conversion.In dark outdoor application pen Remember that this computer can carry out wireless data reading after being connected with the WIFI of embedded data acquisition unit 5, realize faint optical tests Controlled in wireless.

The Bluetooth function of mobile phone carries out the control of the presence or absence of Bluetooth control laser to low-light radiating light source 1, realizes faint light Test.Tester has light and unglazed operating condition to change without opening black box 21, it is not necessary to read data in darkroom, By bluetooth and WIFI functions, so that it may which changing outside darkroom has light and no light condition and carry out wireless data reading by WIFI, Reduce the impact that LCD screen optical signal and tester's heat radiation etc. bring when low-light is detected in darkroom so that test is more accurate Really.

Simply the present invention is further illustrated above, and is not used to limit practicing for this patent, all for this Bright equivalence enforcement, is intended to be limited solely by within the right of this patent.

Claims

1. a kind of controlled in wireless micro light measuring system based on highly sensitive photodetector, including by low-light radiating light source, optics Test platform, photodetector and reading circuit composition low-light test system, low-light radiating light source by laser instrument with decay disk, Optical filter and speculum group into, optic test platform is made up of with the second Amici prism and microcobjective the first Amici prism, its It is characterised by that the system, using Bluetooth control laser end and embedded data acquisition unit, realizes the low-light detection of controlled in wireless, The Bluetooth control laser end is made up of bluetooth communication module, single-chip microcomputer and electric aperture, and electric aperture is arranged on laser instrument And by the opening and closing of Single-chip Controlling laser；The embedded data acquisition unit by respectively with FPGA module, WIFI moulds The arm processor of block, FIFO memorizeies and A/D converter connection is constituted, and A/D converter is connected with FIFO memorizeies；Institute State reading circuit to be connected with FPGA module and A/D converter, by Jing FIFO after data conversion of the A/D converter by reading circuit Memorizer accesses arm processor, and test data is carried out wireless transmission by WIFI module.