CN106951014A - A kind of four-way light power meter with high environmental suitability - Google Patents

A kind of four-way light power meter with high environmental suitability Download PDF

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Publication number
CN106951014A
CN106951014A CN201710364053.5A CN201710364053A CN106951014A CN 106951014 A CN106951014 A CN 106951014A CN 201710364053 A CN201710364053 A CN 201710364053A CN 106951014 A CN106951014 A CN 106951014A
Authority
CN
China
Prior art keywords
pin
chip microcomputer
power meter
light power
analog switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710364053.5A
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Chinese (zh)
Inventor
贾翔宇
吴超
董辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING JILONG OPTICAL COMMUNICATION CO Ltd
Original Assignee
NANJING JILONG OPTICAL COMMUNICATION CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NANJING JILONG OPTICAL COMMUNICATION CO Ltd filed Critical NANJING JILONG OPTICAL COMMUNICATION CO Ltd
Priority to CN201710364053.5A priority Critical patent/CN106951014A/en
Publication of CN106951014A publication Critical patent/CN106951014A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature

Abstract

The invention discloses a kind of four-way light power meter with high environmental suitability, include single-chip microcomputer, four tunnel photodetection circuits, temperature-control circuit, memory and the press key input device being connected respectively with single-chip microcomputer;Include the photodetector being sequentially connected, electric current per road photodetection circuit and turn voltage module, selective circuit of measuring range and A/D modular converters, temperature-control circuit includes the temperature controller and temperature sensor being connected with single-chip microcomputer, and is connected semiconductor chilling plate with temperature controller.The present invention includes the Measurement channel of four tunnel independences, and carries out corresponding temperature adjustment operation by the collection to temperature in light power meter machine box, improves the measurement accuracy of light power meter.

Description

A kind of four-way light power meter with high environmental suitability
Technical field
The present invention relates to light power meter field, specifically a kind of four-way light power meter with high environmental suitability.
Background technology
Light power meter refers to be used directly to measure absolute light power, or the relative damage of luminous power that measurement passes through one section of optical fiber Consumption, and the insertion loss of the poor optical device of measurement instrument, be the equipment commonly used in fiber optic communication measuring technology.Light power meter from Can be divided into two kinds of desk-top light power meter and hand-held optical power gauge in structure, desk-top light power meter precision and stability all compared with Height, is generally used for the occasions such as workshop, laboratory, and hand-held optical power gauge is generally used for exterior components and showed because its portability Field and some occasions not high to measuring accuracy.
The probe segment of light power meter is used for receiving optical signal, produce accordingly Photoelectric current, the effect of host machine part be will the electric signal that detected filter after be amplified and analog to digital conversion, and will be after conversion Digital quantity send CPU to, the data signal after being handled through CPU is finally shown with optical power value or corresponding power level form Out.
The effect of photodetector is to convert optical signals into corresponding electric signal.It it requires that photodetector should be in sound Answer speed, response efficiency, introduce noise in terms of have preferable performance.Photodetector must have sufficiently high response speed with Ensure that the photoelectric current produced can reappear the waveform of incident optical signal without distortion.In addition it is also desirable that the temperature characterisitic of photodetector It is stable.Influence of the environment temperature to power meter measurement accuracy is larger, because temperature can not only influence photodetector to optical signal Conversion, also affects signal amplification and the AD conversion process of host machine part, therefore high-precision light power meter is typically necessary pair The temperature of measuring environment is controlled.
Hand-held optical power gauge measurement accuracy is typically relatively low, and environment influences smaller to it, therefore general to use environment temperature Do not specially require, and the measurement accuracy of desk-top power meter is general higher, the requirement to use environment is stricter, particularly pair The requirement of temperature, typically can all require to use in the environment of temperature stabilization indoors.Desk-top light power meter one in the market As have the following disadvantages:
1st, accuracy of measurement is vulnerable to the influence of variation of ambient temperature;
2nd, it is use fan temperature adjustment more, electromagnetic interference can be caused to host circuit;
3rd, temperature control module function is simple, can only realize temperature adjustment, and amplitude is smaller;
4th, degree of intelligence is low, it is impossible to appropriate regulation is made automatically according to temperature change.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of four-way light power meter with high environmental suitability, including There is the Measurement channel of four tunnel independences, and corresponding temperature adjustment operation is carried out by the collection to temperature in light power meter machine box, improve The measurement accuracy of light power meter.
The technical scheme is that:
A kind of four-way light power meter with high environmental suitability, includes the single-chip microcomputer being arranged in machine box, four tunnels Photodetection circuit, temperature-control circuit and memory, colour liquid crystal display device, and the key-press input dress being arranged on machine box Put;The four tunnels photodetection circuit, temperature-control circuit, memory and press key input device are connected with single-chip microcomputer;It is described Every road photodetection circuit include the photodetector being sequentially connected, electric current turn voltage module, selective circuit of measuring range and A/D modular converters;Described temperature-control circuit includes the temperature controller and temperature sensor being connected with single-chip microcomputer, and Semiconductor chilling plate is connected with temperature controller;Described selective circuit of measuring range includes two moulds being connected respectively with single-chip microcomputer Intend switch chip U8 and U29, described A/D modular converters include A/D conversion chips, two described analog switch chip U8 It is connected with U29 output end with A/D conversion chips, and described selective circuit of measuring range, A/D modular converters connect with single-chip microcomputer Connect.
Described electric current turns voltage module and includes zero shift operational amplifier, the negative pole input of zero shift operational amplifier End is connected with the cathode output end of photodetector, the electrode input end ground connection of zero shift operational amplifier, two analog switches Output end of chip U8 and the U29 pin 3 with zero shift operational amplifier is connected.
Described selective circuit of measuring range also includes eight low-pass filter circuits, described two analog switch chip U8 and U29 four analog input ends are connected by the cathode output end of corresponding low-pass filter circuit and photodetector.
Each described low-pass filter circuit includes the electric capacity and resistance of parallel connection, and one end of electric capacity, one end of resistance are equal Be connected with the cathode output end of photodetector, the other end of electric capacity, the other end of resistance with corresponding analog switch chip U8 or U29 analog input end connection.
The pin 9 of described analog switch chip U8 pin 6 and analog switch chip U29 pin 6 with single-chip microcomputer Connection, analog switch chip U8 pin 9 and analog switch chip U29 pin 9 are connected with the pin 15 of single-chip microcomputer, are simulated Switch chip U8 pin 10 and analog switch chip U29 pin 10 are connected with the pin 14 of single-chip microcomputer, analog switch core Piece U8 output end-pin 13 and analog switch chip U8 output end-input of the pin 13 with A/D conversion chips-draws Pin 9 is connected.
The pin 15 of described A/D conversion chips is connected with the pin 20 of single-chip microcomputer, pin 18 and the list of A/D conversion chips The pin 22 of piece machine is connected, and the pin 19 of A/D conversion chips is connected with the pin 23 of single-chip microcomputer, the pin 20 of A/D conversion chips It is connected with the pin 21 of single-chip microcomputer.
Real-time timepiece chip, colour liquid crystal display device and RS232 COM1s are also associated with described single-chip microcomputer.
Described temperature sensor is three, and is connected respectively with single-chip microcomputer.
Described photodetector selects avalanche photodetector.
Advantages of the present invention:
(1), high environmental suitability:It is mainly reflected in the insensitive of variation of ambient temperature, photodetector choosing of the present invention With avalanche photodetector, the temperature stability of detector is improved, on the other hand, temperature controller can be according to the change of temperature Situation is adjusted accordingly to cooling piece, it is ensured that temperature plateau in machine box, so that adjusting environment temperature reduces temperature to light work( Rate measures the influence of value;
(2), four-way works independently simultaneously:The invention provides the Measurement channel of four tunnel independences, the function of each passage It is identical, the functions, four such as absolute power measurement, relative power measurement, splitting ratio measurement and the measurement of power peak-to-peak value can be completed The parameter setting of individual passage is separate, respectively positioned at four different interfaces, and each passage can work simultaneously, and keeps mutual It is independent;
(3), friendly human-computer interaction interface:The present invention is provided with colour liquid crystal display device so that graphical interfaces is newer Grain husk, user is easier to receive;Main interface is divided into four regions, respectively the optical power value and working condition of 4 passages of display simultaneously, Allow users to read the measured value of each passage at a glance;The lower section of performance number can show the working condition of the passage, use Family can accordingly be changed as needed;The parameter setting interface of each passage can be carried out quickly more by press key input device Change, interface is concise, it is user-friendly.
Brief description of the drawings
Fig. 1 is the theory diagram of the present invention.
Fig. 2 is the workflow diagram of the present invention.
Fig. 3 is the circuit diagram of single-chip microcomputer of the present invention.
Fig. 4 is circuit diagram of the present invention per road photodetection circuit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
See Fig. 1, a kind of four-way light power meter with high environmental suitability includes the single-chip microcomputer being arranged in machine box U22, four tunnel photodetection circuits, temperature-control circuit, memory 08 and real-time timepiece chip 09, and be arranged on machine box Press key input device 10, colour liquid crystal display device 11 and RS232 COM1s 12;Include successively per road photodetection circuit The avalanche photodetector D1 of connection, electric current turns voltage module 02, selective circuit of measuring range 03 and A/D modular converters 04;Temperature control Circuit processed include with temperature controller 05, three temperature sensors 06, and be connected semiconductor refrigerating with temperature controller 05 Piece 07;A/D modular converters 04, temperature controller 05, three temperature sensors 06, memory 08, real-time timepiece chip 09, buttons Input unit 10, colour liquid crystal display device 11 and RS232 COM1s 12 are connected with single-chip microcomputer U22;
See Fig. 4, electric current turns voltage module and includes zero shift operational amplifier U9, zero shift operational amplifier U9 negative pole Input (pin 2) is connected with avalanche photodetector D1 cathode output end, zero shift operational amplifier U9 positive pole input Hold (pin 3) ground connection, the output end (pin of two analog switch chips U8 and U29 pin 3 with zero shift operational amplifier 1) connect;
See Fig. 3 and Fig. 4, selective circuit of measuring range includes two analog switch chip U8 being connected respectively with single-chip microcomputer U22 With U29 and eight low-pass filter circuit, analog switch chip U8 pin 6 and analog switch chip U29 pin 6 with Single-chip microcomputer U22 pin 9 is connected, and analog switch chip U8 pin 9 and analog switch chip U29 pin 9 are and single-chip microcomputer U22 pin 15 is connected, analog switch chip U8 pin 10 and analog switch chip U29 pin 10 with single-chip microcomputer U22 Pin 14 connect, analog switch chip U8 output end-pin 13 and analog switch chip U8 output end-pin 13 with A/D conversion chips U18 input-pin 9 is connected, each low-pass filter circuit include parallel connection electric capacity (C1, C8, C9, C13, C21, C23, C29 or C34) and resistance (R1, R3, R8, R12, R14, R16, R19 or R21), one end of electric capacity, resistance Cathode output end of the one end with avalanche photodetector D1 is connected, the other end of electric capacity, the other end of resistance with it is corresponding Analog switch chip U8 or U29 analog input end connection;
See Fig. 3 and Fig. 4, A/D modular converters include the pin 15 and monolithic of A/D conversion chips U18, A/D conversion chip The pin 20 of machine is connected, and the pin 18 of A/D conversion chips is connected with the pin 22 of single-chip microcomputer, the pin 19 of A/D conversion chips with The pin 23 of single-chip microcomputer is connected, and the pin 20 of A/D conversion chips is connected with the pin 21 of single-chip microcomputer;
See Fig. 1-Fig. 4, operation principle of the invention:
(1), electrifying startup;
(2), single-chip microcomputer (MCU) initialize, including in single-chip microcomputer all resources initialization;
(3), A/D conversion chips (A/D), real-time timepiece chip (RTC) 09 and colour liquid crystal display device (LCD) 11 are initial Change;
(4), whether there is parameter in detection memory (Flash) 08, if in the presence of the parameter in reading memory 08; If being not present, default parameters is used;
(5) initial setting up, is carried out to four tunnel photodetection circuits according to parameter;
(6), press key input device 10 is scanned, and determines whether that key is pressed, if there is key to be pressed, carries out corresponding position Reason, and keyboard scan is carried out again;If no key is pressed, the optical signal of collection is converted into electric current by avalanche photodetector D1 Signal, electric current turns voltage module 02 and current signal is converted into voltage signal, and selective circuit of measuring range 03 carries out voltage signal low Pass filter processing simultaneously selects suitable range according to the power of optical signal, and A/D modular converters 04 carry out analog-to-digital conversion, will finally turn Digital data transmission after changing gives single-chip microcomputer U22, single-chip microcomputer U22 to be changed by the collecting temperature value of temperature sensor 06 and together with A/D The optical power value that module 04 is sent is sent to colour liquid crystal display device 11 and shown;
(7), single-chip microcomputer U22 gathers three temperature values come to three temperature sensors 06 and is weighted processing and algorithm Afterwards, the controlled quentity controlled variable of temperature controller 05 is obtained, so as to drive semiconductor chilling plate 07 to realize to the refrigeration inside machine box and heating Operation, it is ensured that temperature is steady in machine box, improves the measurement accuracy of light power meter.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with Understand and these embodiments can be carried out without departing from the principles and spirit of the present invention a variety of changes, modification, replace And modification, the scope of the present invention is defined by the appended.

Claims (9)

1. a kind of four-way light power meter with high environmental suitability, it is characterised in that:Include the list being arranged in machine box Piece machine, four tunnel photodetection circuits, temperature-control circuit and memory, and the press key input device being arranged on machine box;Institute Four tunnel photodetection circuits, temperature-control circuit, memory and press key input device is stated to be connected with single-chip microcomputer;Described every road Photodetection circuit includes the photodetector being sequentially connected, electric current and turns voltage module, selective circuit of measuring range and A/D conversions Module;Described temperature-control circuit includes the temperature controller and temperature sensor being connected with single-chip microcomputer, and and temperature Controller connects semiconductor chilling plate;Described selective circuit of measuring range includes two analog switches being connected respectively with single-chip microcomputer Chip U8 and U29, described A/D modular converters include A/D conversion chips, described two analog switch chips U8 and U29 Output end be connected with A/D conversion chips, and described selective circuit of measuring range, A/D modular converters are connected with single-chip microcomputer.
2. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described Electric current turn voltage module and include zero shift operational amplifier, the negative input of zero shift operational amplifier and photodetection The cathode output end connection of device, the electrode input end ground connection of zero shift operational amplifier, two analog switch chips U8's and U29 Output end of the pin 3 with zero shift operational amplifier is connected.
3. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described Selective circuit of measuring range also include eight low-pass filter circuits, described two analog switch chips U8 and U29 four moulds Analog quantity input is connected by the cathode output end of corresponding low-pass filter circuit and photodetector.
4. a kind of four-way light power meter with high environmental suitability according to claim 3, it is characterised in that:Each Described low-pass filter circuit includes the electric capacity and resistance of parallel connection, and one end of electric capacity, one end of resistance are and photodetector Cathode output end connection, one with corresponding analog switch chip U8 or U29 of the other end of electric capacity, the other end of resistance Analog input end is connected.
5. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described Analog switch chip U8 pin 6 and analog switch chip U29 pin 6 be connected with the pin 9 of single-chip microcomputer, analog switch Chip U8 pin 9 and analog switch chip U29 pin 9 are connected with the pin 15 of single-chip microcomputer, analog switch chip U8's Pin 10 and analog switch chip U29 pin 10 are connected with the pin 14 of single-chip microcomputer, and analog switch chip U8 output end- Pin 13 and analog switch chip U8 output end-pin 13 are connected with input-pin 9 of A/D conversion chips.
6. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described The pin 15 of A/D conversion chips be connected with the pin 20 of single-chip microcomputer, the pin 18 of A/D conversion chips and the pin 22 of single-chip microcomputer Connection, the pin 19 of A/D conversion chips is connected with the pin 23 of single-chip microcomputer, the pin 20 of A/D conversion chips and drawing for single-chip microcomputer Pin 21 is connected.
7. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described Single-chip microcomputer on be also associated with real-time timepiece chip, colour liquid crystal display device and RS232 COM1s.
8. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described Temperature sensor be three, and be connected respectively with single-chip microcomputer.
9. a kind of four-way light power meter with high environmental suitability according to claim 1, it is characterised in that:It is described Photodetector select avalanche photodetector.
CN201710364053.5A 2017-05-22 2017-05-22 A kind of four-way light power meter with high environmental suitability Pending CN106951014A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201653549U (en) * 2009-12-02 2010-11-24 天津光电通信技术有限公司 Multichannel optical power meter
CN203364966U (en) * 2013-07-30 2013-12-25 武汉理工大学 High-precision and high-sensitivity optical power meter with large dynamic range
CN203840623U (en) * 2014-05-23 2014-09-17 北京新时空照明技术有限公司 Light control circuit based on pressure sensor control
CN105911465A (en) * 2016-04-25 2016-08-31 国网新疆电力公司检修公司 Circuit breaker switch state detection device based on principle of magnetic field
CN206920953U (en) * 2017-05-22 2018-01-23 南京吉隆光纤通信股份有限公司 A kind of four-way light power meter with high environmental suitability

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201653549U (en) * 2009-12-02 2010-11-24 天津光电通信技术有限公司 Multichannel optical power meter
CN203364966U (en) * 2013-07-30 2013-12-25 武汉理工大学 High-precision and high-sensitivity optical power meter with large dynamic range
CN203840623U (en) * 2014-05-23 2014-09-17 北京新时空照明技术有限公司 Light control circuit based on pressure sensor control
CN105911465A (en) * 2016-04-25 2016-08-31 国网新疆电力公司检修公司 Circuit breaker switch state detection device based on principle of magnetic field
CN206920953U (en) * 2017-05-22 2018-01-23 南京吉隆光纤通信股份有限公司 A kind of four-way light power meter with high environmental suitability

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Application publication date: 20170714