CN209446732U - Real-time clock detection device - Google Patents
Real-time clock detection device Download PDFInfo
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- CN209446732U CN209446732U CN201920039647.3U CN201920039647U CN209446732U CN 209446732 U CN209446732 U CN 209446732U CN 201920039647 U CN201920039647 U CN 201920039647U CN 209446732 U CN209446732 U CN 209446732U
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Abstract
The utility model discloses a kind of real-time clock fault detection means, which includes: temperature compensating crystal oscillator circuit, tests and analyzes module, communication interface modules, main control module, display module.Temperature compensating crystal oscillator circuit is for providing accurately clock source.Test and analyze the real-time clock failure that module is used to detect and analyze intelligent electric meter or RTC chip.Communication interface modules includes control input interface and display driving interface, and control input interface being capable of input test request.Main control module is used to for the detection data of the real-time clock failure for testing and analyzing module to be converted into the data convenient for display；Display module is used to show the real-time clock fault-detection data after the main control module conversion.The detection and analysis module, the communication interface modules and the main control module are integrated on fpga chip.The real-time clock detection device can easily carry out the real-time clock fault detection and analysis of RTC chip in RTC chip or ammeter.
Description
Technical field
The utility model is about electronic measuring technology field, especially with regard to a kind of real-time clock detection device.
Background technique
With the development that country builds in smart grid, intelligent electric meter covers city dweller user substantially.RTC(Real-
Time-Clock real-time clock) chip is module indispensable in intelligent electric meter, major function is to provide real-time and precise
Clock provides accurately basis of time for work such as electrical energy measurement, the time calendars of intelligent electric meter.Therefore the precision of RTC chip
And stability is extremely important.
For RTC chip, there are no dedicated detection devices at present.Only exist to the detection method of real-time clock at present
The situation of real-time clock is tentatively obtained in factory testing or whole table detection process to intelligent electric meter using whole table detection table platform.It should
Detection mode by whole table detection table platform includes following disadvantage: 1, since whole table detection table stage body product is excessive, it is mainly used for
Intelligent electric meter factory testing or the detection of whole table are not easy to be carried to the progress RTC fault detection of user scene.2, whole table detection
Table platform mainly detects entire intelligent electric meter, not high to the detection accuracy of real-time clock although function comparison is more,
0.1PPM can only be at most arrived, and existing whole table detection table platform can not detect independent RTC chip.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
The purpose of this utility model is to provide a kind of real-time clock detection devices, can easily carry out RTC core
The real-time clock fault detection of RTC chip and analysis, detection accuracy are up to 0.01PPM in piece or ammeter.
To achieve the above object, the utility model provides a kind of real-time clock fault detection means comprising: temperature is mended
It repays crystal-oscillator circuit, test and analyze module, communication interface modules, main control module, display module.Temperature compensating crystal oscillation
Device circuit is for providing accurately clock source.Module is tested and analyzed to be connected with the temperature compensating crystal oscillator circuit, it is external
Tested RTC chip and data interaction can be carried out between intelligent electric meter, for detecting and analyzing the intelligent electric meter or institute
State the real-time clock failure of RTC chip.Communication interface modules includes control input interface and display driving interface, the control
Input interface is requested for input test.Main control module and the detection and analysis module and the communication interface modules are homogeneous
Even, for the detection data of the real-time clock failure for testing and analyzing module to be converted into the data convenient for display.Show mould
Block is connected with the display driving interface, after showing the main control module conversion under the driving of the display driving interface
Real-time clock fault-detection data.Wherein, the detection and analysis module, the communication interface modules and the main control module
It is integrated on fpga chip.
In a preferred embodiment, the clock accuracy of the temperature compensating crystal oscillator circuit is less than
0.0025PPM。
In a preferred embodiment, the detection and analysis module includes: RTC chip test jack, ammeter pulse ends
Son test test pencil.RTC chip test jack is for connecting RTC chip.Ammeter pulse terminal test test pencil is used for and intelligent electric meter
Carry out data interaction.Accident analysis circuit and the RTC chip test jack and ammeter pulse terminal test test pencil with
And the temperature compensating crystal oscillator circuit is connected, for detect the RTC chip or the intelligent electric meter it is real-time when
Clock signal data is also used to the real-time clock signal by the real-time clock signal data of the RTC chip or the intelligent electric meter
Data are compared and analyzed with clock reference data, to analyze the real-time clock of the RTC chip or the intelligent electric meter
Fault condition, the reference data can pass through the accident analysis circuit and temperature compensating crystal oscillator circuit institute group
At circuit measuring obtain.
In a preferred embodiment, the communication interface modules further include: I2C interface, infrared interface.I2C interface
Be connected with the RTC chip test jack, the RTC chip test jack by the I2C interface realize the RTC chip with
The main control module and the data interaction tested and analyzed between module.The ammeter pulse terminal test test pencil passes through institute
State infrared interface realization and the main control module and the data interaction tested and analyzed between module.
In a preferred embodiment, the display module is LCD display.
Compared with prior art, real-time clock detection device according to the present utility model will test analysis module, communication connects
Mouth mold block and main control module are integrated on fpga chip, provided with the communication interface modules to match with main control module；It builds
It has found the data tested and analyzed between module, communication interface modules and main control module three to transmit, has realized RTC in intelligent electric meter
The fault detection and analysis of chip and independent RTC chip, it is versatile, it is convenient for carrying；And by precision less than 0.0025PPM's
High precision temperature compensation electric power crystal-oscillator circuit and the circuit for testing and analyzing module composition acquisition clock reference data, can be real
Existing 0.01PPM clock accuracy measurement.But also it will test and be provided with ammeter pulse terminal test test pencil and RTC in analysis module
Independent RTC chip is inserted into RTC chip test jack in use or by the pulse ends of ammeter by chip, maintenance engineering teacher
Son, which directly connects ammeter pulse terminal test test pencil and forms complete RTC chip, tests hardware environment, can easily into
The fault detection and analysis etc. of RTC chip in row RTC chip or ammeter.
Detailed description of the invention
Fig. 1 is the module composition schematic diagram according to the real-time clock detection device of one embodiment of the utility model.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
Fig. 1 is the module composition schematic diagram according to the real-time clock detection device of one embodiment of the utility model.The reality
When clock detecting device include: temperature compensating crystal oscillator circuit 10, test and analyze module 11, is communication interface modules 12, main
Control module 13 and display module 14.Wherein, it is integrated that module 11, communication interface modules 12 and main control module 13 are tested and analyzed
On FPGA (programmable logic array) chip 100, the small and exquisite portable of real-time clock detection device is realized.
The clock accuracy of temperature compensating crystal oscillator circuit 10 is less than 0.0025PPM, for providing to fpga chip 100
Accurately clock source.It can realize that 0.01PPM clock accuracy measures using the temperature compensating crystal oscillator circuit 10.
It tests and analyzes module 11 to be connected with temperature compensating crystal oscillator circuit 10, external tested RTC chip and can
Data interaction is carried out between intelligent electric meter, for detecting and analyzing the real-time clock failure of intelligent electric meter or RTC chip.The inspection
The failure mode that analysis module 11 is able to detect and analyzes is surveyed to include at least clock accuracy error, timing alarm mistake, consolidate
Fixed cycle Interruption mistake, time update interrupt error, calendar mistake (mistake containing leap year) etc..
Communication interface modules 12 includes control input interface 12a and display driving interface 12b, control input interface 12a
It being capable of input test request.
Main control module 13 is connected with detection and analysis module 11 and communication interface modules 12, for will test analysis module
The data that the detection data of 11 real-time clock failure is converted into convenient for display.
Display module 14 is connected with communication interface modules 12, for showing master control under the driving of display driving interface 12b
Real-time clock fault-detection data after the conversion of module 13.
Preferably, test and analyze module 11 include: RTC chip test jack 11a, ammeter pulse terminal test test pencil 11b,
Accident analysis circuit 11c.RTC chip test jack 11a is for connecting RTC chip.Ammeter pulse terminal test test pencil 11b is used for
Data interaction is carried out with intelligent electric meter.Accident analysis circuit 11c and RTC chip test jack 11a and ammeter pulse terminal are surveyed
A take temperature 11b and temperature compensating crystal oscillator circuit 10 is connected, for detect RTC chip or intelligent electric meter it is real-time when
Clock signal data, be also used to real-time clock signal data by the real-time clock signal data of RTC chip or intelligent electric meter and when
Clock reference data compare and analyze, to analyze the real-time clock fault condition of RTC chip or intelligent electric meter, reference data
It can be obtained by accident analysis circuit 11c and circuit measuring composed by temperature compensating crystal oscillator circuit 10.It is detecting
Test pencil 11b, accident analysis circuit are tested by integrated RTC chip test jack 11a and ammeter pulse terminal in analysis module 11
11c etc. tests circuit, can support the intelligence of the chip packages such as SOP14, SOP12, SOP10, SOP8 and national grid standard
The intelligent electric meter of ammeter and south electric network standard, may be implemented various chips encapsulation, multiple standards intelligent electric meter RTC chip
Fault detection and analysis, it is versatile, it is convenient for carrying.Independent RTC chip is inserted into RTC in use by maintenance engineering teacher
Chip testing socket 11a or by the pulse terminal of ammeter directly connect ammeter pulse terminal test test pencil 11b form completely
RTC chip tests hardware environment, can easily carry out in independent RTC chip or ammeter the fault detection of RTC chip and
Analysis etc..
Further, communication interface modules 12 further include: (Inter-Integrated-Circuit twin wire is serial by I2C
Bus) interface 12c and infrared interface 12d.I2C interface 12c is connected with RTC chip test jack 11a, RTC chip test jack
11a realizes RTC chip and main control module 13 by I2C interface 12c and tests and analyzes the data interaction between module 11.Ammeter
Pulse terminal test test pencil 11b realizes the number between main control module 13 and detection and analysis module 11 by infrared interface 12d
According to interaction.Specifically, infrared interface 12d uses UART communication protocol.
In conclusion the real-time clock detection device that present embodiment provides will test analysis module, communication interface modules
And main control module is integrated on fpga chip, provided with the communication interface modules to match with main control module；Establish inspection
The data surveyed between analysis module, communication interface modules and main control module three are transmitted, realize in intelligent electric meter RTC chip and
The fault detection and analysis of independent RTC chip, it is versatile, it is convenient for carrying, electric power overhaul engineer in use will be only
The pulse terminal of ammeter is directly connected ammeter pulse terminal test test pencil by vertical RTC chip insertion RTC chip test jack
Complete RTC chip test hardware environment is formed, the failure of RTC chip in RTC chip or ammeter can be easily carried out
Detection and analysis etc..
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (5)
1. a kind of real-time clock detection device characterized by comprising
Temperature compensating crystal oscillator circuit, for providing accurately clock source；
Module is tested and analyzed, is connected with the temperature compensating crystal oscillator circuit, external tested RTC chip and can be with intelligence
Data interaction can be carried out between ammeter, for detecting and analyzing the real-time clock failure of the intelligent electric meter or the RTC chip；
Communication interface modules, including control input interface and display driving interface, the control input interface are surveyed for inputting
Examination request；
Main control module is connected with the detection and analysis module and the communication interface modules, is used for the detection and analysis
The data that the detection data of the real-time clock failure of module is converted into convenient for display；And
Display module is connected with the display driving interface, for showing the master under the driving of the display driving interface
Real-time clock fault-detection data after controlling module conversion,
Wherein, the detection and analysis module, the communication interface modules and the main control module are integrated on fpga chip.
2. real-time clock detection device as described in claim 1, which is characterized in that the temperature compensating crystal oscillator circuit
Clock accuracy be less than 0.0025PPM.
3. real-time clock detection device as described in claim 1, which is characterized in that the detection and analysis module includes:
RTC chip test jack, for connecting RTC chip；
Ammeter pulse terminal tests test pencil, for carrying out data interaction with intelligent electric meter；And
Accident analysis circuit, with the RTC chip test jack and ammeter pulse terminal test test pencil and the temperature
It spends compensated crystal oscillator circuit to be connected, for detecting the real-time clock signal number of the RTC chip or the intelligent electric meter
According to, be also used to real-time clock signal data by the real-time clock signal data of the RTC chip or the intelligent electric meter and when
Clock reference data compare and analyze, so that the real-time clock fault condition of the RTC chip or the intelligent electric meter is analyzed,
The reference data can pass through circuit composed by the accident analysis circuit and the temperature compensating crystal oscillator circuit
Measurement obtains.
4. real-time clock detection device as claimed in claim 3, which is characterized in that the communication interface modules further include:
I2C interface is connected with the RTC chip test jack, and the RTC chip test jack is realized by the I2C interface
The RTC chip and the main control module and the data interaction tested and analyzed between module；And
Infrared interface, the ammeter pulse terminal test test pencil are realized and the main control module and institute by the infrared interface
State the data interaction tested and analyzed between module.
5. real-time clock detection device as described in claim 1, which is characterized in that the display module is LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920039647.3U CN209446732U (en) | 2019-01-10 | 2019-01-10 | Real-time clock detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920039647.3U CN209446732U (en) | 2019-01-10 | 2019-01-10 | Real-time clock detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541443A (en) * | 2019-01-10 | 2019-03-29 | 北京智芯微电子科技有限公司 | Real-time clock detection device and method |
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2019
- 2019-01-10 CN CN201920039647.3U patent/CN209446732U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541443A (en) * | 2019-01-10 | 2019-03-29 | 北京智芯微电子科技有限公司 | Real-time clock detection device and method |
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