CN113702716A - Multichannel redundant frequency counting board card structure - Google Patents
Multichannel redundant frequency counting board card structure Download PDFInfo
- Publication number
- CN113702716A CN113702716A CN202111263992.3A CN202111263992A CN113702716A CN 113702716 A CN113702716 A CN 113702716A CN 202111263992 A CN202111263992 A CN 202111263992A CN 113702716 A CN113702716 A CN 113702716A
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- chip
- board
- mcu chip
- fpga
- redundant frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R23/10—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage by converting frequency into a train of pulses, which are then counted, i.e. converting the signal into a square wave
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Abstract
The invention discloses a multichannel redundant frequency counting board card structure, which comprises a mother board and a daughter board, wherein the mother board comprises an FPGA (field programmable gate array), an MCU (micro control unit) chip, a first base connector and a first power chip for supplying electric energy, the daughter board comprises a jumper pin, a second base connector and a second power chip for supplying electric energy, the jumper pin is connected with the second base connector and an external power supply, the output end of the jumper pin is connected with the FPGA through a hysteresis comparator, the output end of the FPGA is connected with the input end of the MCU chip, the MCU chip is used for carrying out frequency measurement and pulse counting on collected square wave signals or sinusoidal signals, the MCU chip is connected with an external central processing unit, and the board card structure can meet the access of different types of signals and has the functions of pulse counting and frequency measurement.
Description
Technical Field
The invention relates to a card structure, in particular to a multi-channel redundant frequency counting card structure.
Background
When the multi-channel redundant frequency counting board card is applied to thermal power generation, when the multi-channel redundant frequency counting board card is actually applied to a power plant, signals output by the multi-channel redundant frequency counting board card are collected in a DCS system and are important information sources of the DCS system, when the multi-channel redundant frequency counting board card is connected with signals, the levels of the signals connected into each power plant are possibly inconsistent, the types of the signals connected into each power plant are possibly different, and the signal modes to be measured are possibly different, generally, different multi-channel redundant frequency counting board cards are connected into signals of different types and different levels, so that the cost is higher, and information needs to be collected for the second time, so that the instability of the system is caused, in order to meet the measurement of multiple types of actual field signals, the multi-channel redundant board card is urgently designed to meet the connection of the signals of different types, and meanwhile, the board card has the functions of pulse counting and frequency measurement, however, no similar disclosure is given in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a multi-channel redundant frequency counting board card structure which can meet the requirements of accessing different types of signals and has the functions of pulse counting and frequency measurement.
In order to achieve the purpose, the multichannel redundant frequency counting board card structure comprises a mother board and a daughter board, wherein the mother board comprises an FPGA, an MCU chip, a first base connector and a first power chip for supplying electric energy, the daughter board comprises a jumper pin, a second base connector and a second power chip for supplying electric energy, the jumper pin is connected with the second base connector and an external power supply, the output end of the jumper pin is connected with the FPGA through a hysteresis comparator, the output end of the FPGA is connected with the input end of the MCU chip, the MCU chip is used for measuring the frequency of signals and counting pulses, and the MCU chip is connected with an external central processing unit.
The MCU chip is connected with an external central processing unit through the communication chip.
The output end of the jumper pin is connected with the input end of the hysteresis comparator through an isolation device.
The communication chip further comprises a first overvoltage protection module used for performing overvoltage protection on the communication chip.
The overvoltage protection device further comprises a second overvoltage protection module used for performing overvoltage protection on the isolation device.
The FPGA is connected with the output end of the hysteresis comparator through a data interface.
The MCU chip is connected with the control end of each state indicator through a data interface.
And the minimum system is connected with the FPGA.
And carrying out frequency measurement and pulse counting on the collected square wave signals or sinusoidal signals through the MCU chip.
When the jumper pin works, a sinusoidal signal output by the jumper pin enters the hysteresis comparator after being electrically isolated by the isolating device, and is converted into a square wave signal by the hysteresis comparator.
The invention has the following beneficial effects:
when the multichannel redundant frequency counting board card structure is in specific operation, the jumper pin is connected with the second base connector and an external power supply, the signal type supported by the board card, namely the access of an active signal and a passive signal, is selected through the access or disconnection of the jumper pin, the board card can access different level signals according to the access of the external power supply, the configuration can be flexibly carried out according to actual field signals, the flexibility is high, in addition, during the operation, the frequency measurement and the pulse counting are carried out on the collected square wave signals or sine signals through the MCU chip, and the MCU chip is connected with an external central processing unit so as to have the functions of pulse counting and frequency measurement.
Furthermore, the communication chip and the isolation device are subjected to overvoltage protection through the first overvoltage protection module and the second overvoltage protection module, so that the stability and the safety of the system are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
The system comprises a motherboard 1, a daughter board 2, an FPGA3, an MCU chip 4, a communication chip 5, a first overvoltage protection module 6, a first power chip 7, a first base connector 8, a second base connector 9, a second overvoltage protection module 10, a jumper pin 11, a second power chip 12, an isolation device 13, a hysteresis comparator 14, a status indicator lamp 15, a data interface 16 and a minimum system 17.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the multichannel redundant frequency counting card structure of the present invention includes a motherboard 1 and a daughter board 2, wherein the motherboard 1 includes a minimum system 17, an FPGA3, an MCU chip 4, a communication chip 5, a first overvoltage protection module 6, a first socket connector 8, and a first power chip 7; the daughter board 2 comprises a status indicator lamp 15, a hysteresis comparator 14, an isolation device 13, a second overvoltage protection module 10, a second base connector 9, a jumper pin 11 and a second power supply chip 12;
the minimum system 17 is connected with the FPGA3, the second base connector 9 is connected with the second power chip 12, the daughter board 2 is provided with electric energy through the second power chip 12, the jumper pin 11 is connected with an external power supply and the second base connector 9, the second base connector 9 is used as an internal power supply, the output end of the jumper pin 11 is connected with the input end of the hysteresis comparator 14 through the isolation device 13, the isolation device 13 is protected by overvoltage through the second overvoltage protection module 10, the output end of the hysteresis comparator 14 is connected with the input end of the FPGA3 through the data interface 16, the output end of the FPGA3 is connected with the input end of the MCU chip 4, the MCU chip 4 is connected with an external central processing unit through the communication chip 5, the communication chip 5 is protected by overvoltage through the first overvoltage protection module 6, the second base connector 9 is connected with the second power chip 12, the mother board 1 is provided with electric energy through the first power chip 7, the MCU chip 4 is connected to a status indicator light 15 via a data interface 16.
During operation, sinusoidal signals output by the jumper 11 enter the hysteresis comparator 14 after being electrically isolated by the isolation device 13, the sinusoidal signals are converted into square wave signals through the hysteresis comparator 14, the FPGA3 collects the square wave signals output by the hysteresis comparator 14 through the data interface 16 and then sends the square wave signals to the MCU chip 4, the MCU chip 4 carries out frequency measurement and pulse counting on the collected square wave signals or sinusoidal signals, and the central processing unit can obtain frequency measurement and pulse counting results of the square wave signals in the MCU chip 4 through the communication chip 5.
In addition, during operation, the second overvoltage protection module 10 is used for performing overvoltage protection on the isolation device 13, the first overvoltage protection module 6 is used for performing overvoltage protection on the communication chip 5, and meanwhile, the state of each channel measurement signal in the jumper pin 11, the power supply states of the motherboard 1 and the daughter board 2, the state of the communication chip 5, the working state of the MCU chip 4 and the like are visually reflected through the state indicator lamps 15, wherein the jumper pin 11 is provided with eight channels.
The principle of the invention is as follows:
when the jumper pin 11 is in short circuit, all channels in the jumper pin 11 are powered by an internal 24V power supply (the second base connector 9), a passive mode is selected, and the external part can only access 24V dry contact level signals.
When the jumper pin 11 is not short-circuited, the first channel to the fourth channel in the jumper pin 11 are powered by an internal 24V power supply, a passive mode is selected, the outside can only access 24V dry junction level signals, the fifth channel to the eighth channel in the jumper pin 11 are powered by an external power supply, when the passive signals are input into the fifth channel to the eighth channel in the jumper pin 11, the signal level is determined by the level of the external power supply, and the external power supply can access 5V/12V/24V, so that the actual application scene of the board card is wide, and various level type signals can be accessed.
When the jumper pin 11 is not short-circuited, the first channel to the fourth channel in the jumper pin 11 are powered by an internal 24V power supply (the second base connector 9), a passive mode is selected, the outside can only access 24 dry contact level signals, and active signals can be input into the fifth channel to the eighth channel in the jumper pin 11, so that various types of signals can be accessed, specifically, active signals with different levels of 5V/12V/24V can be accessed;
the invention is characterized in that:
by switching in or switching off the jumper 11, the board card can be flexibly selected to support the signal type, namely active and passive signal access;
through the connection or disconnection of the jumper 11, the board card can access different level signals according to the connection of an external power supply, can be flexibly configured according to actual field signals, and is high in flexibility;
meanwhile, the FPGA3 is used, so that the measurement precision of the board card frequency measurement and pulse counting is high, and the real-time performance is good;
in addition, the invention uses the MCU chip 4, can carry on the flexible configuration to the board card measuring mode through the central processing unit, realize the undisturbed switching of channel frequency measurement and count.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. The utility model provides a multichannel redundant frequency counting board card structure, a serial communication port, including mother board (1) and daughter board (2), wherein, mother board (1) includes FPGA (3), MCU chip (4), first base connector (8) and be used for providing first power chip (7) of electric energy, daughter board (2) are including jump pin (11), second base connector (9) and be used for providing second power chip (12) of electric energy, wherein, jump pin connector (11) are connected with second base connector (9) and external power source, the output of jump pin (11) is connected with FPGA (3) through hysteresis comparator (14), the output of FPGA (3) is connected with the input of MCU chip (4), carry out frequency measurement and the pulse count of signal through MCU chip (4), MCU chip (4) are connected with outside central processing unit.
2. The structure of the multichannel redundant frequency counting board according to claim 1, characterized in that the MCU chip (4) is connected to an external central processing unit via a communication chip (5).
3. A multichannel redundant frequency counter card structure according to claim 2, characterized in that the output of the jumper pin (11) is connected to the input of the hysteresis comparator (14) via an isolating device (13).
4. A multichannel redundant frequency counter board structure according to claim 3, characterized in that it further comprises a first overvoltage protection module (6) for overvoltage protection of the communication chip (5).
5. A multichannel redundant frequency counter board structure according to claim 4, characterized in that it further comprises a second overvoltage protection module (10) for overvoltage protection of the isolating device (13).
6. The multichannel redundant frequency counter card structure according to claim 1, characterized in that the FPGA (3) is connected to the output of the hysteresis comparator (14) via a data interface (16).
7. The structure of the multi-channel redundant frequency counting board card of claim 1, further comprising a plurality of status indicator lamps (15), wherein the MCU chip (4) is connected with the control end of each status indicator lamp (15) through a data interface (16).
8. The multichannel redundant frequency counter card structure according to claim 1, characterized in that it further comprises a minimal system (17) connected to the FPGA (3).
9. The structure of the multi-channel redundant frequency counting board card of claim 1, wherein the frequency measurement and pulse counting of the collected square wave signals or sinusoidal signals are performed by the MCU chip (4).
10. The multi-channel redundant frequency counting board structure of claim 1, wherein in operation, a sinusoidal signal output by the jumper pin (11) enters the hysteresis comparator (14) after being electrically isolated by the isolation device (13) and is converted into a square wave signal by the hysteresis comparator (14).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111263992.3A CN113702716A (en) | 2021-10-28 | 2021-10-28 | Multichannel redundant frequency counting board card structure |
| JP2022000672U JP3237718U (en) | 2021-10-28 | 2022-03-07 | Multi-channel redundant frequency count board structure |
| DE202022102701.3U DE202022102701U1 (en) | 2021-10-28 | 2022-05-17 | Multi-channel redundant frequency counting board structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111263992.3A CN113702716A (en) | 2021-10-28 | 2021-10-28 | Multichannel redundant frequency counting board card structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113702716A true CN113702716A (en) | 2021-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111263992.3A Pending CN113702716A (en) | 2021-10-28 | 2021-10-28 | Multichannel redundant frequency counting board card structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3237718U (en) |
| CN (1) | CN113702716A (en) |
| DE (1) | DE202022102701U1 (en) |
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2021
- 2021-10-28 CN CN202111263992.3A patent/CN113702716A/en active Pending
-
2022
- 2022-03-07 JP JP2022000672U patent/JP3237718U/en active Active
- 2022-05-17 DE DE202022102701.3U patent/DE202022102701U1/en active Active
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| Publication number | Publication date |
|---|---|
| JP3237718U (en) | 2022-06-03 |
| DE202022102701U1 (en) | 2022-05-23 |
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