CN103095298A - Multichannel and multi-angle high-speed processing method for analogue-to-digital conversion signal - Google Patents
Multichannel and multi-angle high-speed processing method for analogue-to-digital conversion signal Download PDFInfo
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- CN103095298A CN103095298A CN 201110341033 CN201110341033A CN103095298A CN 103095298 A CN103095298 A CN 103095298A CN 201110341033 CN201110341033 CN 201110341033 CN 201110341033 A CN201110341033 A CN 201110341033A CN 103095298 A CN103095298 A CN 103095298A
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Abstract
The invention discloses a multichannel and multi-angle high-speed processing method for an analogue-to-digital conversion signal in automobile engine tests. The method is characterized in that a buffer in a first in first out (FIFO) type is added at an input end of the analogue-to-digital (AD) signal, and data of different angles and different channels are acquired by adjusting frequency of a hardware counter and a central processing unit (CPU) counter.
Description
Technical field
The present invention relates to the method for high speed processing of the analog-converted signal of multichannel multiple angles in automotive engine test.
Background technology
Engine is the heart of automobile, for the walking of automobile provides power.Be to improve dynamic property, economy, the feature of environmental protection of automobile, the data of each cylinder and analyzing when needing to gather automobile engine work.This just requires the collection of engine data, must satisfy high channel, multiple angles precision, these requirements at a high speed.But data acquisition technology can not satisfy such requirement at present
Summary of the invention
Goal of the invention: the object of the invention is to the deficiency for above-mentioned technology, a kind of high speed processing method of analog-converted signal of multichannel multiple angles is provided.
Technical scheme: the high speed processing method of the analog-converted signal of multichannel multiple angles of the present invention is, at the AD signal input part, increase the buffering of fifo type, by adjusting the frequency of hardware counter and CPU counter, obtain the data of different angles, different passages.
The present invention compared with prior art, when the present invention can realize automotive engine test, data acquisition multichannel, multi-angle, requirement at a high speed.To the analysis of follow-up engine data, provide reliable assurance.
Description of drawings
Fig. 1 is that the AD data are read in flow process.
Fig. 2 is handling process of the present invention.
Embodiment
The below is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
Embodiment:
System configuration:
(1) input the primary voltage signal of angle, cycle and each passage from the engine end.
(2) voltage signal is sent to the AD version and carries out analog-to-digital conversion
(3) AD signal input part, the buffering of increase fifo type first is read in buffer memory when the AD data begin.By adjusting the frequency of hardware counter and CPU counter, the difference of real-time inspection CPU counter and hardware counter controls the AD data and read, thereby realization obtains the function of the data of different angles, different passages.
(4) judge cycle variation and angle variation according to angle and the periodic signal of input simultaneously.Thereby set up the relation in AD data and angle, cycle.Realize the analog-converted signal high speed processing of multichannel, multi-angle.
Obtain the AD data as shown in figure one, principle is as follows:
(1) H/W counter O reset
(2) CPU counter O reset
(3) the IOSTRT instruction is arranged, the peek beginning.The H/W counter, when reading in the data of 8 word lengths, the H/W counter also adds 8.(data of taking out 8 word lengths from fifo area are left with (trigger mode) in the SDRAM that is put into the AD data)
(4) the difference inspection of H/W counter and CPU counter is on duty minute when occuring, and execution in step 5.
(5) the CPURD instruction is arranged, data are read in beginning.1 data is read into the appointed area.But, if during trigger mode, need to read in the data of 8 words.When the CPURD instruction is carried out, the CPU counter cumulative 8.After, just carry out step 5 when the H/W counter is identical with the CPU counter.In the time of H/W counter and CPU counter overflow, Counter Value becomes 0.
The structure that leaves the AD data in FIFO in is as follows:
The B15Cycle position ... when Cycle changes, become 1
B14 angle position ... when angle changes, become 1
Show whole handling process in figure two
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.
Claims (2)
1. the method for the high speed processing of an analog-converted signal of realizing multichannel multiple angles in automotive engine test, in the process that data are read in, that controls the speed that buffer data reads in and control data synchronously realizes the method.
2. the method for the high speed processing of the analog-converted signal of multichannel multiple angles according to claim 1 is characterized in that:
From the primary voltage signal of engine end input angle, cycle and each passage,
Voltage signal is sent to the AD plate and carries out analog-to-digital conversion,
Leave in the buffering of fifo type after the AD conversion, by adjusting the frequency of hardware counter and CPU counter, the difference of real-time inspection CPU counter and hardware counter is controlled the AD data and is read,
Judge cycle variation and angle variation according to angle signal and periodic signal with the time input, thereby set up the relation in AD data and angle, cycle, according to cycle sign, angle index, data, such form is deposited, prepare for follow-up processing, realize like this analog-converted signal high speed processing of multichannel, multi-angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110341033 CN103095298A (en) | 2011-11-02 | 2011-11-02 | Multichannel and multi-angle high-speed processing method for analogue-to-digital conversion signal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110341033 CN103095298A (en) | 2011-11-02 | 2011-11-02 | Multichannel and multi-angle high-speed processing method for analogue-to-digital conversion signal |
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| CN103095298A true CN103095298A (en) | 2013-05-08 |
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| CN 201110341033 Pending CN103095298A (en) | 2011-11-02 | 2011-11-02 | Multichannel and multi-angle high-speed processing method for analogue-to-digital conversion signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609186A (en) * | 2019-09-16 | 2019-12-24 | 连云港杰瑞电子有限公司 | Automatic testing system and method for shaft angle-digital module parameters |
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- 2011-11-02 CN CN 201110341033 patent/CN103095298A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609186A (en) * | 2019-09-16 | 2019-12-24 | 连云港杰瑞电子有限公司 | Automatic testing system and method for shaft angle-digital module parameters |
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Application publication date: 20130508 |