CN201532574U - Centralized type multi-CPU industrial monitoring device timing system - Google Patents
Centralized type multi-CPU industrial monitoring device timing system Download PDFInfo
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- CN201532574U CN201532574U CN200920242943XU CN200920242943U CN201532574U CN 201532574 U CN201532574 U CN 201532574U CN 200920242943X U CN200920242943X U CN 200920242943XU CN 200920242943 U CN200920242943 U CN 200920242943U CN 201532574 U CN201532574 U CN 201532574U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model discloses a centralized type multi-CPU industrial monitoring device timing system, which comprises two schemes. The first scheme includes that that the system comprises a main CPU and at least one secondary CPU, the main CPU is communicated with the secondary CPU through a system site bus, and the system is characterized in that the main CPU is further communicated with each secondary CUP through a second impulse bus. The second scheme includes that the system comprises a main CPU and at least one secondary CPU, the main CPU is communicated with the secondary CPU through a system site bus, the system is characterized in that the centralized type multi-CPU industrial monitoring device timing system is further provided with a GPS antenna and a GPS receiver, and the GPS receiver is respectively communicated with the main CPU and the secondary CPU through second impulse buses, and the GPS antenna is directly connected with the GPS receiver. The centralized type multi-CPU industrial monitoring device timing system is skillful in design, simple in structure and accurate in timing, and can effectively guarantee uniformity of CPU clocks in the same intelligent monitoring device.
Description
Technical field
The utility model relates to the timing system of industrial monitoring device, specifically, relates to two kinds of timing systems of centralized many CPU industrial monitoring device.
Background technology
In same many CPU industrial monitoring device, owing to there are a plurality of intelligent objects that have separate CPU, and each intelligent object CPU frequent nonsynchronous problem of time of occurrence in operational process, therefore synchronous in the time of need carrying out the school to the CPU of each intelligent object, so that keep each intelligent object CPU consistance in time, thereby guarantee the data sampling of supervising device and the accuracy of control.
At present, it is synchronous when the communication message that the clock of each intelligent object CPU mainly relies on host CPU to send carries out the school to it, owing to exist uncertain during the communication message school, and be difficult to accurately carry out the time delay error compensation of transmission course constantly in the communication message school, simultaneously the load capacity of each CPU self also has nothing in common with each other, thus the accuracy when greatly reducing the message school.Above-mentioned many uncertain factors make that the timing system clocking error between existing many CPU industrial monitoring device intelligent object is bigger.And, because existing computed in software backoff algorithm is very complicated, even constantly transmission course is compensated in the message school, also can additionally take very big cpu resource, cause the CPU expense to increase, make in the message school constantly when transmission course compensated the method for accuracy when improving the school and be not suitable for the school of many CPU industrial monitoring device.
The utility model content
The purpose of this utility model is to provide a kind of centralized many CPU industrial monitoring device timing system, under the prerequisite that does not increase the cpu resource expense, solve the stationary problem of each intelligent object cpu clock, and synchronous accuracy when improving the school, target logical consistency when guaranteeing each device intelligence device information, thus the monitoring precision of supervising device is provided.
To achieve these goals, consider that centralized many CPU industrial monitoring device relates to band GPS and is not with two situations of GPS, the utility model has proposed following two kinds of technical schemes respectively at both of these case:
Scheme one (not being with GPS)
Centralized many CPU industrial monitoring device timing system comprises a host CPU and at least one from CPU, and host CPU and from being communicated with by the system for field bus between the CPU is characterized in that described host CPU also is communicated with from CPU with each by the pulse per second (PPS) bus.
Scheme two (band GPS)
Centralized many CPU industrial monitoring device timing system, comprise that a host CPU and at least one are from CPU, host CPU and from being communicated with by the system for field bus between the CPU, it is characterized in that, described centralized many CPU industrial monitoring device timing system also is provided with gps antenna and gps receiver, respectively with host CPU, be communicated with from CPU, gps antenna directly is connected with gps receiver described gps receiver by the pulse per second (PPS) bus.
So-called pulse per second (PPS) bus is meant the system for field bus that is exclusively used in the transmission pps pulse per second signal.
Design concept of the present utility model: on the basis of existing technology, keep each cpu clock mode when year, month, day, hour, min, the school of second constant, transmit pps pulse per second signal by increasing the pulse per second (PPS) bus, each CPU is after receiving pps pulse per second signal, according to pps pulse per second signal revise the millisecond of self cpu clock, the millisecond of all cpu clocks is consistent, guarantee that simultaneously millisecond is between 100 milliseconds to 900 milliseconds, thereby avoid the carry problem that millisecond arrives second, so that solve the clocking error that brings because of carry algorithm complexity.
On the basis of above-mentioned design concept, two kinds of situations that relate in conjunction with present technique, in the industrial monitoring device with GPS not, pps pulse per second signal is sent by host CPU; In the industrial monitoring device of GPS, pps pulse per second signal is sent by gps receiver by gps antenna.
The utility model design is ingenious, simple in structure, and accurate during the school, target logical consistency in the time of can guaranteeing each intelligence monitoring and controlling device information effectively is for systematic analysis is provided convenience.The utility model is mainly used in the industrial monitoring system, has very high practical value.
Description of drawings
Fig. 1 is the system chart during not with GPS in the utility model.
Fig. 2 is the system chart when being with GPS in the utility model.
Embodiment
The utility model is described in further detail below by coming for example.
Embodiment one
As shown in Figure 1, centralized many CPU industrial monitoring device timing system of no GPS comprises a host CPU and at least one from CPU, host CPU and from being communicated with by the system for field bus between the CPU, it is characterized in that described host CPU also is communicated with from CPU with each by the pulse per second (PPS) bus.Between each intelligent object CPU of system with the look-at-me pin of each intelligent object CPU pulse per second (PPS) bus as system, when the time of host CPU is positioned at 100-900ms, send pps pulse per second signal by host CPU, respectively after receiving the pulse per second (PPS) look-at-me, revise the millisecond of own clock, make each millisecond consistent with the millisecond of host CPU clock from cpu clock from CPU.
When going between the 100-900ms, the time millisecond that system's host CPU sends sends communication message when being used for the school by communication port, respectively after receiving communication message, revise year, month, day, hour, min, the second of own clock from CPU, but do not revise millisecond, the modification of millisecond is by the pps pulse per second signal decision of system.
Embodiment two
As shown in Figure 2, centralized many CPU industrial monitoring device timing system of band GPS, comprise that a host CPU and at least one are from CPU, host CPU and from being communicated with by the system for field bus between the CPU, it is characterized in that, described centralized many CPU industrial monitoring device timing system also is provided with gps antenna and gps receiver, and respectively with host CPU, be communicated with from CPU, gps antenna directly is connected with gps receiver described gps receiver by the pulse per second (PPS) bus.By the pps pulse per second signal of GPS and a look-at-me pin between each intelligent object CPU of system pulse per second (PPS) bus as system, when host CPU clock millisecond is positioned at 100～900ms, system sends pps pulse per second signal by GPS, respectively after receiving the pulse per second (PPS) look-at-me, revise the millisecond of own clock, make each millisecond consistent with the millisecond of host CPU clock from cpu clock from intelligent object CPU.By above-mentioned control, make cpu clock avoid the carry problem that millisecond arrives second, thereby solved because of the complicated problem that causes clocking error of carry algorithm.
When going between the 100-900ms, the time millisecond that system's host CPU sends sends communication message when being used for the school by communication port, respectively after receiving communication message, revise year, month, day, hour, min, the second of own clock from CPU, but do not revise millisecond, the modification of millisecond is by the pps pulse per second signal decision of system.
Claims (2)
1. centralized many CPU industrial monitoring device timing system comprises a host CPU and at least one from CPU, and host CPU and from being communicated with by the system for field bus between the CPU is characterized in that described host CPU also is communicated with from CPU with each by the pulse per second (PPS) bus.
2. centralized many CPU industrial monitoring device timing system, comprise that a host CPU and at least one are from CPU, host CPU and from being communicated with by the system for field bus between the CPU, it is characterized in that, described centralized many CPU industrial monitoring device timing system also is provided with gps antenna and gps receiver, respectively with host CPU, be communicated with from CPU, gps antenna directly is connected with gps receiver described gps receiver by the pulse per second (PPS) bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920242943XU CN201532574U (en) | 2009-11-03 | 2009-11-03 | Centralized type multi-CPU industrial monitoring device timing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920242943XU CN201532574U (en) | 2009-11-03 | 2009-11-03 | Centralized type multi-CPU industrial monitoring device timing system |
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| Publication Number | Publication Date |
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| CN201532574U true CN201532574U (en) | 2010-07-21 |
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| CN200920242943XU Expired - Fee Related CN201532574U (en) | 2009-11-03 | 2009-11-03 | Centralized type multi-CPU industrial monitoring device timing system |
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2009
- 2009-11-03 CN CN200920242943XU patent/CN201532574U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU JIAODA GUANGMANG TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHENGDU JIAODA GUANGMANG INDUSTRIAL CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: The middle Tianfu Avenue in Chengdu city Sichuan province 610000 No. 801 Tianfu Software Park B District 2 Building 5 floor Patentee after: Chengdu Jiaoda Guangmang Technology Co., Ltd. Address before: 610000, 5 building, 2 B area, Tianfu Software Park, 801 Tianfu Road, Middle East Tianfu Road, Chengdu, Sichuan Patentee before: Chengdu Jiaoda Guangmang Industry Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20181103 |