CN202916008U - Multichannel optical power meter - Google Patents
Multichannel optical power meter Download PDFInfo
- Publication number
- CN202916008U CN202916008U CN 201220563984 CN201220563984U CN202916008U CN 202916008 U CN202916008 U CN 202916008U CN 201220563984 CN201220563984 CN 201220563984 CN 201220563984 U CN201220563984 U CN 201220563984U CN 202916008 U CN202916008 U CN 202916008U
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- Prior art keywords
- bus
- power meter
- optical power
- multichannel optical
- head end
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Abstract
The utility model relates to a multichannel optical power meter comprising a control panel and a plurality of front-end testing panels. And the control panel is respectively connected with the plurality of front-end testing panels by CAN buses. According to the utility model, the provided multichannel optical power meter has advantages of support of hot plugging, concise wiring, high efficiency transmission and natural data framing. Two ends of each of the CAN bus are connected to the control panel and a resistor is used to carry out electrical matching on the control panel, thereby ensuring the circuit consistency of the front-end testing panels.
Description
Technical field
The utility model relates to the light power meter in the optical tests field, particularly relates to a kind of Multichannel optical power meter.
Background technology
Light power meter is the necessary equipment of test optical fiber and optical device test, be widely used in engineering site test and production test, with respect to single binary channels power meter equipment, Multichannel optical power meter has been realized a plurality of passage luminous power synchronism detections, promoted testing efficiency, current Multichannel optical power meter adopts Universal Asynchronous Receiver ﹠ dispensing device (Universal Asynchronous Receiver/Transmitter, be called for short " UART ") realize communicating by letter between master control borad and the head end test plate, because UART does not belong to bus, can only realize 1 pair 1 communication, therefore master control borad must adopt a lot of UART ports, the UART wiring quantity that is used for communication is many, the characteristics that are limited to simultaneously UART, the speed of communication is low; In addition, UART communication does not possess the frame concept, uses inconvenience in the situation that continues the high load capacity data communication.
The utility model content
The utility model provide a kind of have tenaculum hot-line insertion and extraction, wiring succinct, transmit Multichannel optical power meter efficient, the natural framing of data.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of Multichannel optical power meter is provided, comprise control panel and a plurality of head end test plate, described control panel links to each other with a plurality of head end test plates respectively by the CAN bus, and test data and order are finished transmission by the CAN bus.
Described CAN bus arrangement is on backboard, and described control panel and head end test the plate respectively connector by separately link to each other with CAN bus on the backboard.
Described CAN bus is one or more.
Described CAN bus is connected to described master control borad by backboard head and the tail two ends, realizes electric coupling in CAN bus two ends by resistance on the described master control borad.
Has the geocoding pin on the connector of described head end test plate.
Described head end test plate comprises photoelectric sensor, filter amplification circuit and the low noise Acquisition Circuit of successively series connection; The output terminal of described low noise Acquisition Circuit links to each other with the SPI port of MCU control chip; Three I/O pin of described MCU control chip link to each other with the groove bit address line on the described backboard; The CAN passage of described MCU control chip drives chip by CAN and links to each other with CAN bus on the backboard.
Described control panel adopts 32 MCU as control core, possesses two CAN interfaces, 2 SPI ports, UART interface, Ethernet interface, USB interface, a plurality of I/O port, and goes out 2 road CAN passages by two-way SPI ports-Extending.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the utility model compared with prior art, have following advantage and good effect: the utility model has the tenaculum hot-line insertion and extraction, connects up succinctly, transmits advantage efficient, the natural framing of data based on the CAN bus, the total demand pairs of CAN have carried out complete definition according to frame, and bus has collision avoidance and retransmission mechanism, and can realize conveniently that broadcast communication, device just want the application layer data protocol definition clear, can realize the efficient communication of based on data frame.The utility model all is connected to control panel with the two ends of each bar CAN bus, carries out resistors match at control panel, thereby guarantees the consistent of front-end control plate circuit.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the block diagram of head end test plate in the utility model;
Fig. 3 is the software work figure of head end test plate in the utility model;
Fig. 4 is the block diagram of control panel in the utility model;
Fig. 5 is the software work figure of control panel in the utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment of the present utility model relates to a kind of Multichannel optical power meter, as shown in Figure 1, comprises control panel and a plurality of head end test plate, and described control panel links to each other with a plurality of head end test plates respectively by the CAN bus.Wherein, described CAN bus can be arranged on the backboard, and described control panel and head end test the plate respectively connector by separately link to each other with CAN bus on the backboard.
The CAN bus of using the utility model realizes the interior communication of the equipment of Multichannel optical power meter, carries out data and control command and transmit between control panel and head end test plate.Carry polylith head end test plate can be realized many CAN buses in the equipment on every CAN bus, possesses one or more test channel on every block of head end test plate, thereby realizes the more much higher lane testing of data transfer rate.
Electrical specification according to the CAN bus, need to carry out resistors match at the two ends of a bus, to guarantee the reliable transmission of data, circuit for fear of each front-end control plate is inconsistent, the utility model all is connected to control panel with the two ends of each bar CAN bus, carry out resistors match at control panel, thereby guarantee the consistent of head end test plate circuit.
Each head end test connector for substrate all has the geocoding pin, and the head end test plate is known the address code of oneself by reading address coding pin.
Further specify the utility model below by a specific embodiment.
The design's example adopts 4 CAN buses, maximum 6 blocks of head end test plates of carry on every bus, and every block of head end test plate possesses two test channel, and whole Multichannel optical power meter is realized nearly 48 luminous power test channel.
The hardware of head end test plate consists of sees Fig. 2, employing has 8 MCU of CAN module as control chip, the light signal of incident is electric signal through conversion of photoelectric sensor, through filter amplification circuit, enter high precision low noise sample circuit, MCU samples to the two-way photosignal in turn by the SPI port.Three I/O pin of MCU are connected to the groove bit address line on the backboard, the groove position is different, the level configuration of these three address wires is different, after powering on, reads the head end test plate numerical value of these three address wires, thereby know the groove bit number at place, according to groove position information configuration CAN receiving filtration register, thereby guarantee that the CAN Frame that only meets this address could be received by the CAN module of this test board." plate information in place " is that I/O of MCU is connected to master control by backboard, when the front end test board power on finish after, this pin level is dragged down, thereby informs that this groove bit test plate of master control is in place.EEPROM is used for depositing calibration information, the configuration information on this test board, and MUC links to each other with EEPROM by iic bus, finishes the read-write operation of data.The CAN passage drives chip by CAN and is connected to CAN port on the backboard groove position, and MCU realizes operation to CAN by the register of CAN module in the sheet.
The software of head end test plate adopts the firmware mode to realize, without operating system, software configuration as shown in Figure 3, software is by various drives interrupts, comprise that SPI interruption, IIC interruption, Interruption, CAN drive, and carry out explanation and the processing of numerical evaluation, non real-time order in major cycle.
The master control borad hardware structure diagram as shown in Figure 3, adopt 32 MCU as control core, select possess two CAN interfaces, the MCU model of 2 above SPI interfaces, above UART interface, above Ethernet interface, above USB interface, a plurality of I/O ports; Expand 2 road CAN passages by two-way SPI, form altogether 4 road CAN buses, the head and the tail of each bar CAN passage all are connected to master control borad, place electric build-out resistor, make electric coupling and head end test plate irrelevant.The UART port of MCU connects RS232 outward and drives chip, forms the RS232 communication port of complete machine; The USB port of MCU connects the level driver part outward, forms the usb communication port of complete machine; The RMII port of MCU connects ether PHY chip outward, forms the 100Mbps ethernet port of complete machine; Link to each other storage complete machine configuration information among the EEPROM with EEPROM by iic bus.
Master control borad software is realized at embedded multiple task operating system, structure as shown in Figure 4, mainly finish each exploitation that drives of bottom, comprise a plurality of timer interrupt handling routines, CAN driver, ethernet driver, UART driver, SPI driver.Application task is realized PC communication process task and CAN communications data frame Processing tasks, and wherein PC communication data Processing tasks receives and resolves network data, replys, the network data order is changed into the order of CAN communication data; CAN communications data frame Processing tasks is finished the initiation of CAN communication, the reception of CAN data is explained, and test data is placed buffer memory.
Master control borad forms transfer control function, communicates by letter with host computer, receives control command and also is forwarded to the respective front ends test board, and reception information and state obtain order, and the situation of respective front ends passage is uploaded to PC.
The CAN communication protocol design utilizes CAN Frame 11 bit-identify characters, carries purpose plate address, source plate address, orders large category information, and carry Payload and pass in 8 byte data districts.Comprise packet header, when a packet surpassed 8 bytes, packet is divided into the multiframe transmission to be finished.Packet is divided into broadcasting and two kinds of clean cultures, and broadcast type needs front end-plates all on the CAN bus that communications packets is produced response, and clean culture only has the Target Board response.Master control is overtime to communications setting, when call duration time exceeds pre-provisioning request, once communicates by letter and finishes in overtime mode.
Communicating by letter between equipment and the PC preferentially adopts the Ethernet mode to carry out, realize the server of a UDP5000 port in the equipment, when receiving that when obtaining the order that test data reads, whether effectively once the test data with all passages sends PC to, comprise simultaneously each channel data sign; When receiving the data command that needs the CAN forwarding, the networking command data-switching is become the CAN data layout, initiate CAN communication, simultaneously the networking command disposition is replied to PC, PC can be by sending the implementation status of ordering the last order of inquiry.
The utility model has the tenaculum hot-line insertion and extraction, connects up succinctly, transmits advantage efficient, the natural framing of data based on the CAN bus, the total demand pairs of CAN have carried out complete definition according to frame, and bus has collision avoidance and retransmission mechanism, device just wants the application layer data protocol definition clear, the efficient communication of based on data frame can be realized, and broadcast communication can be conveniently realized.The utility model all is connected to control panel with the two ends of each bar CAN bus, carries out resistors match at control panel, thereby guarantees the consistent of front-end control plate circuit.
Claims (7)
1. a Multichannel optical power meter comprises control panel and a plurality of head end test plate, it is characterized in that, described control panel links to each other with a plurality of head end test plates respectively by the CAN bus, and test data and order are finished transmission by the CAN bus.
2. Multichannel optical power meter according to claim 1 is characterized in that, described CAN bus arrangement is on backboard, and described control panel and head end test the plate respectively connector by separately link to each other with CAN bus on the backboard.
3. Multichannel optical power meter according to claim 1 is characterized in that, described CAN bus is one or more.
4. Multichannel optical power meter according to claim 2 is characterized in that, described CAN bus is connected to described master control borad by backboard head and the tail two ends, and described master control borad is realized electric coupling in CAN bus two ends by resistance.
5. Multichannel optical power meter according to claim 2 is characterized in that, has the geocoding pin on the connector of described head end test plate.
6. Multichannel optical power meter according to claim 2 is characterized in that, described head end test plate comprises photoelectric sensor, filter amplification circuit and the low noise Acquisition Circuit of successively series connection; The output terminal of described low noise Acquisition Circuit links to each other with the SPI port of MCU control chip; Three I/O pin of described MCU control chip link to each other with the groove bit address line on the described backboard; The CAN passage of described MCU control chip drives chip by CAN and links to each other with CAN bus on the backboard.
7. Multichannel optical power meter according to claim 2, it is characterized in that, described control panel adopts 32 MCU as control core, possess two CAN interfaces, 2 SPI ports, UART interface, Ethernet interface, USB interface, a plurality of I/O port, and go out 2 road CAN passages by two-way SPI ports-Extending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220563984 CN202916008U (en) | 2012-10-30 | 2012-10-30 | Multichannel optical power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220563984 CN202916008U (en) | 2012-10-30 | 2012-10-30 | Multichannel optical power meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202916008U true CN202916008U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220563984 Expired - Fee Related CN202916008U (en) | 2012-10-30 | 2012-10-30 | Multichannel optical power meter |
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| CN (1) | CN202916008U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278383A (en) * | 2015-11-04 | 2016-01-27 | 中国电子科技集团公司第四十一研究所 | Modular multi-channel optical power meter and realization method thereof |
| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
| CN106052859A (en) * | 2016-05-18 | 2016-10-26 | 中国电子科技集团公司第四十研究所 | Method for multi-range thermopile laser power meter to obtain identical zero power |
-
2012
- 2012-10-30 CN CN 201220563984 patent/CN202916008U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278383A (en) * | 2015-11-04 | 2016-01-27 | 中国电子科技集团公司第四十一研究所 | Modular multi-channel optical power meter and realization method thereof |
| CN105278383B (en) * | 2015-11-04 | 2018-05-11 | 中国电子科技集团公司第四十一研究所 | A kind of modular multichannel light power meter and its implementation |
| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
| CN106052859A (en) * | 2016-05-18 | 2016-10-26 | 中国电子科技集团公司第四十研究所 | Method for multi-range thermopile laser power meter to obtain identical zero power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20201030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |