CN105403747B - Multi-template synchronous detecting method and oscillograph - Google Patents

Abstract

The invention discloses a multi-template synchronous testing method and an oscilloscope. The method includes calling template data of required types stored in a data storage module and transmitting them to a main controller module; The illegal areas in the template data are combined to obtain the illegal area information of the synthetic template, and the illegal area information of the synthetic template is sent to the data storage module to be stored in the form of an array; the first n bits of the array are flag bits, and one flag bit and One kind of template corresponds one to one, n is the generated template type; the signal acquisition module collects the measured signal, obtains the position information of each sampling point of the measured signal, and transmits it to the main controller module; the main controller module retrieves the data The violation area information of the synthesis template of the storage module is compared with the position information of each sampling point of the signal under test with the violation area position of the synthesis template to obtain the multi-template synchronous test result of the signal under test.

Description

Multi-template synchronous testing method and oscilloscope

technical field

The invention relates to a test method, in particular to a multi-template synchronous test method and an oscilloscope.

Background technique

The mask test function first selects the template type according to the actual test needs, and then judges the relationship between the collected signal waveform and the template. If the waveform point falls within the template area, it is judged as a violation. The user can set the test time or the number of test waveforms and the violation threshold. After a period of time or a certain number of collected waveforms is tested, compare whether the statistical violation value reaches the set violation threshold to judge whether the test is passed or failed.

Template types include standard templates, custom templates, and extreme templates. Standard templates usually have templates corresponding to various standard signals such as ITU-T, ANSIT1.102, USB, etc. These standard templates are fixed and follow their own standards; customized templates are based on the standard templates according to the vertical margin set The new template formed can adjust the size of the vertical direction of the template, and the margin can be changed to observe the signal during the standard template test; the limit template is a template created on the basis of a signal source waveform with good quality, which can be set according to the set level, Vertical Margin adjusts the distance between the template and the source waveform.

At present, some oscilloscopes have launched a user-created mask function, that is, users can draw arbitrary graphics on the screen as the mask area and perform mask testing. In the test functions of middle and high-end oscilloscopes, the mask test function is generally optional, including standard masks, customized masks and limit masks. Standard templates usually have templates corresponding to various standard signals such as ITU-T, ANSI T1.102, and USB; custom templates are new templates formed by adjusting the vertical margin on the basis of standard templates; limit templates are based on signal source waveforms The template created above can adjust the horizontal and vertical margins between the template and the source waveform. The current mask test function of the oscilloscope basically selects these types of templates based on fixed data, and only tests one of them.

During the mask test of the oscilloscope, the selected standard template is based on a standard and fixed template; the limit template is a template created based on the source waveform data, and the template is consistent with the original waveform. The standard template can only adjust the margin in the vertical direction, and the limit template can adjust the margin in the horizontal and vertical directions, but they cannot be adjusted arbitrarily.

Existing oscilloscopes perform mask testing, whether they choose a standard mask, limit mask, or a user-created mask, only one mask is tested, and simultaneous testing of multiple masks cannot be completed. This makes mask testing costly, inefficient and time-consuming.

Contents of the invention

In order to solve the shortcomings of the prior art, the invention provides a multi-template synchronous testing method and an oscilloscope. The method can read one or more templates, and adopts a multi-template synthesis method for template processing. After reading the collected data, while performing waveform display, an efficient multi-template synchronous test can be realized through one judgment.

To achieve the above object, the present invention adopts the following technical solutions:

A method for synchronous testing of multiple templates, wherein the template is divided into a violation area and a normal area, comprising:

Step (1): Retrieving template data of the required type stored in the data storage module and sending it to the main controller module;

Step (2): The main controller module sums the illegal areas in all required types of template data to obtain the illegal area information of the synthesized template, and sends the illegal area information of the synthesized template to the data storage module for storage in the form of an array ; Wherein, the first n bits of the array are marker bits, and a marker bit corresponds to a template one by one, and n is the generated template type; at the same time, the marker position corresponding to the template contained in any point in the violation area of the synthesized template 1, the remaining mark positions are 0;

Step (3): The signal acquisition module collects the measured signal, obtains the position information of each sampling point of the measured signal, and transmits it to the main controller module;

Step (4): The main controller module retrieves the illegal area information of the synthetic template of the data storage module, compares the position information of each sampling point of the signal under test with the illegal area position of the synthetic template, and obtains the multi-template synchronization of the measured signal Test Results.

In step (4), if all sampling points of the signal under test do not fall within the violation area of the synthetic template, the signal under test passes the test; Whether the corresponding flag bit is set to 1, and finally obtain all violation templates of the signal under test synchronously.

In the step (1), the templates stored in the data storage module include standard templates, customized templates and extreme templates.

In the step (1), the template stored in the data storage module also includes a self-defined image file template; both the violation area and the normal area in the image file template can be customized.

The image file template includes BMP image, JPG image, PNG image and grayscale image.

The data of the required template in the step (1) also includes the color of each pixel in the required template.

In step (2), the color of each pixel in the synthesized template is also obtained by superimposing the colors of each pixel in all required templates.

An oscilloscope, which is an oscilloscope applying the multi-template synchronous testing method.

The beneficial effects of the present invention are:

(1) The multi-template synchronous testing method that the present invention proposes, on the basis of existing template testing, adopts multi-template synthesis and can carry out efficient multi-template synchronous testing, while improving user template testing efficiency, has strengthened template testing greatly flexibility.

(2) The user can flexibly read one or more templates according to the test requirements, and use multi-template synthesis for template processing. After reading the collected data, while performing waveform display, an efficient multi-template synchronous test can be realized through one judgment; Finally, the method realizes multi-template combined synchronous testing.

Description of drawings

Fig. 1 is the flowchart of multi-template synchronous testing method of the present invention;

Fig. 2 is an embodiment of the multi-template synchronous testing method of the present invention.

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

FIG. 1 is a flow chart of the multi-template synchronous testing method of the present invention. The specific process of the testing method of the present invention will be described in detail below in conjunction with FIG. 1 . In a nutshell, the method includes:

Step (1): Retrieve template data of the required type stored in the data storage module, and transmit to the main controller module.

Wherein, the templates stored in the data storage module include standard templates, customized templates and extreme templates.

The template stored in the data storage module also includes a custom image file template; the violation area and the normal area in the image file template can be customized.

The image file template includes BMP image, JPG image, PNG image and grayscale image.

The image file template can be edited and obtained as required, and the data of the image file template can be transferred to the data memory through USB or other external storage for storage.

Wherein, the data memory includes random access memory, FLASH memory and other memories.

Step (2): The main controller module sums the illegal areas in all required types of template data to obtain the illegal area information of the synthesized template, and sends the illegal area information of the synthesized template to the data storage module for storage in the form of an array ; Wherein, the first n bits of the array are marker bits, and a marker bit corresponds to a template one by one, and n is the generated template type; at the same time, the marker position corresponding to the template contained in any point in the violation area of the synthesized template 1, and the remaining mark positions are 0.

Step (3): The signal acquisition module collects the signal under test, obtains the position information of each sampling point of the signal under test, and transmits it to the main controller module.

Step (4): The main controller module retrieves the illegal area information of the synthetic template of the data storage module, compares the position information of each sampling point of the signal under test with the illegal area position of the synthetic template, and obtains the multi-template synchronization of the measured signal Test Results.

If all the sampling points of the signal under test do not fall within the violation area of the synthetic template, the signal under test has passed the test; otherwise, the signal under test has a violation, and then according to the corresponding flag position at the position where the signal under test occurs, Finally, all violation templates of the signal under test are obtained synchronously.

The method adopts multi-template synthesis to carry out efficient multi-template synchronous testing, and greatly enhances the flexibility of template testing while improving the efficiency of user template testing. After reading the collected data, while displaying the waveform, an efficient multi-template synchronous test can be realized through one judgment.

The data of the required template in the step (1) also includes the color of each pixel in the required template.

In step (2), the color of each pixel in the synthesized template is also obtained by superimposing the colors of each pixel in all required templates.

The oscilloscope based on the multi-template synchronous testing method of the present invention includes: a main controller module connected to a data storage module and a signal acquisition module respectively.

(1) A data storage module, which is used to store required types of template data.

The templates stored in the data storage module include standard templates, customized templates and extreme templates.

The template stored in the data storage module also includes a custom image file template; the violation area and the normal area in the image file template can be customized.

The image file template includes BMP image, JPG image, PNG image and grayscale image.

(2) A signal collection module, which is used to collect the signal under test, obtain the position information of each sampling point of the signal under test, and transmit it to the main controller module.

(3) The main controller module, which includes a template data acquisition module, a template synthesis module and a synchronous testing module.

(3.1) template data acquisition module, which is used to call template data of the required type stored in the data storage module, and call the violation area information of the synthetic template of the data storage module;

(3.2) template synthesis module, which is used to obtain the violation area information of the synthesis template by the method of obtaining the union of the violation areas in all required template data, and send the violation area information of the synthesis template to the data storage module to store in the form of an array ;

(3.3) synchronous test module, it is used for comparing the location information of each sampling point of the signal under test with the violation region location of synthetic template:

If all the sampling points of the signal under test do not fall within the violation area of the synthetic template, the signal under test has passed the test; otherwise, the signal under test has a violation, and then according to the corresponding flag position at the position where the signal under test occurs, Finally, all violation templates of the signal under test are obtained synchronously.

Further, the data of the required template stored in the data storage module also includes the color of each pixel in the required template.

Further, the template synthesis module is also used to obtain the color of each pixel in the synthesized template by superimposing the colors of each pixel in all required templates.

Finally, in conjunction with the embodiment of the multi-template synchronous testing method of the present invention in Fig. 2, the test embodiment of the method is described, as shown in Fig. 2, an embodiment of the test of the present invention:

1. First, set the template test settings, including the number of templates, template color, test end conditions, and violation threshold.

The template color includes the color corresponding to each template and the color of the intersecting area of each template;

The test end condition can be the test time or the number of test waveforms.

2. Generating palette data according to the set template color, that is, establishing the index value of the template and the corresponding color table.

3. Generate synthetic template data according to the template type and data:

1. Define the position information of the violation area of the composite template and store it in the array MultiMaskSign, and the array is initialized to all 0s.

The first n bits of the array MultiMaskSign are marker bits, and each template occupies 1 data bit, corresponding to template 1, template 2, ..., template n in turn from low to high, if a certain position is a template, set the corresponding bit to 1, Otherwise set the corresponding bit to 0.

2. Standard template: Read the vertex data of the polygon corresponding to the template, calculate the range of the template area inside the polygon, and set the corresponding position of the corresponding MultiMaskSign in the template area to 1.

3. Customized template: Read the polygon vertex data corresponding to the standard template, multiply it by the set vertical margin parameter, calculate the new vertex position of the customized template, calculate the template area range inside the polygon, and set the corresponding MultiMaskSign corresponding position in the template area 1.

4. Limit mask: Read the source waveform data, multiply it by the set horizontal and vertical margin parameters, calculate the position of each point in the mask, calculate the range of the mask area, and set the corresponding position of the corresponding MultiMaskSign in the template area to 1.

5. Image file template: read the image file, judge the type of the image file, such as BMP and JPG, read the image data sequentially according to the definition of the corresponding file format, and judge the corresponding pixel color, if it is a template area, set MultiMaskSign accordingly bit is 1.

6. Define the display array MultiMaskColor of the synthetic test template, where the array is initialized to all 0s.

7. Read the data in the synthetic test template tag array sequentially, use this as the index value to read the color data in the corresponding color table, and put this color data into the corresponding position in the MultiMaskColor.

8. According to the displayed data of the synthesized test template, the synthesized result of multiple templates is displayed on the screen.

4. Read the collected data of the input signal, judge the data in the synthetic test template mark array MultiMaskSign corresponding to the waveform point position, if there is a template, add 1 to the violation count value of all the templates contained in this position, and update the test result display.

5. Determine whether the test end condition is met. If the end condition is not met, return to the fourth step to continue the test. If the end condition is met, the template test is completed.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (8)

1. a kind of multi-template synchronous detecting method, the template are divided into fault region and normal region, it is characterised in that bag Include：

Step（1）：The template data for the required type being stored in data memory module is transferred, and is sent to master controller mould Block；

Step（2）：Union is sought in fault region in the template data of all required types by main controller module, obtains synthesis mould The fault area information of plate, and the fault area information for synthesizing template is sent to data memory module and stored with array form； Wherein, the preceding n positions of array are marker bit, and a marker bit corresponds with a kind of template, and n is the institute for generating synthesis template Need the templating species of type；Meanwhile the corresponding mark of the template included in the fault region of template at any point will be synthesized Position 1, remaining mark position 0；

Step（3）：Signal acquisition module is acquired measured signal, obtains the positional information of each sampled point of measured signal, And it is sent to main controller module；

Step（4）：The fault area information of the synthesis template of main controller module called data memory module, by measured signal The positional information of each sampled point obtains the multi-template synchronism detection of measured signal compared with synthesizing the fault regional location of template As a result.

2. a kind of multi-template synchronous detecting method as claimed in claim 1, it is characterised in that in step（4）In, if tested letter Number all sampled points do not fall within synthesis template fault region in, then measured signal test pass through；Otherwise, measured signal is sent out Raw to break rules, whether the corresponding marker bit of the opening position that breaks rules further according to measured signal puts 1, and final synchronization gain is tested to be believed Number all fault template.

A kind of 3. multi-template synchronous detecting method as claimed in claim 1, it is characterised in that the step（1）In, it is stored in Template in data memory module, including standard form, custom built forms and limit template.

A kind of 4. multi-template synchronous detecting method as claimed in claim 3, it is characterised in that the step（1）In, it is stored in Template in data memory module, in addition to customized image file template；Fault region in described image file template Setting is can customize with normal region.

5. a kind of multi-template synchronous detecting method as claimed in claim 4, it is characterised in that described image file template includes BMP images, JPG images, PNG images and gray level image.

A kind of 6. multi-template synchronous detecting method as claimed in claim 1, it is characterised in that the step（1）Needed for mould The data of plate also include the color of each pixel in required template.

7. a kind of multi-template synchronous detecting method as claimed in claim 6, it is characterised in that in step（2）In, also pass through by The method of the color addition of each pixel in template needed for all, obtain the color of each pixel in synthesis template.

8. a kind of oscillograph, it is characterised in that the oscillograph is to apply multi-template synchronous detecting method as claimed in claim 1 Oscillograph.