CN109612509A - A kind of tendency chart display processing method based on hand-held signal measurement instrument - Google Patents
A kind of tendency chart display processing method based on hand-held signal measurement instrument Download PDFInfo
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- 238000005259 measurement Methods 0.000 title claims abstract description 89
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D7/00—Indicating measured values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
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Abstract
The invention discloses a kind of tendency chart display processing methods based on hand-held signal measurement instrument, belong to instrument and meter fields of measurement.The tendency chart display processing method that the present invention provides a kind of Refresh Data real-times suitable for hand-held signal measurement instrument is good, measurement result accuracy is high, user's operation friendly is strong；Has the real-time display function that each measurement point arrival carries out interface refreshing；Friendly interface display result is provided；Improve the accuracy that user reads tendency chart；It solves the disadvantages that difficulty caused by there are different hand-held frequency measuring instruments different screen resolutions show to tendency chart, overcomes that fixed points flexibility to be shown is poor, complete show that measurement result display refresher rate is slow, user specifically understands tendency chart near some measurement point and should not operate.
Description
Technical field
The invention belongs to instrument and meter fields of measurement, and in particular to a kind of tendency chart based on hand-held signal measurement instrument
Display processing method.
Background technique
With the progress of measuring technique, demand of the people to various measuring instruments is also more and more, and high-precision is hand-held
Formula frequency measuring instrument adapts to industry development trend, has many advantages, such as that portable, measurement accuracy is high, function diversification, can be accurate
Frequency, time, period of measuring signal etc..And the tendency chart real-time, accurate, friendliness is high is as user's observation signal feature
Approach is then of great significance, and people continuously improve and improve thinking in the display processing for carrying out tendency chart, has devised not
Same display methods.Hand-held frequency measuring instrument on the market handles often using at data pick-up the display of tendency chart
The method for managing display, can greatly improve Drawing of Curve rate in this way, and can embody the measurement number such as frequency to a certain extent
According to the trend of variation.
Existing implementation are as follows:
1, mode is directly displayed:
Hand-held frequency measuring instrument saves each data that measurement obtains into memory, carries out solid when tendency chart display
Fixed points to be shown；The measured data for reading respective numbers from memory is drawn；When thering is new measurement data to arrive every time
The tendency chart for refreshing fixed points achievees the effect that real-time display.
2, data pick-up mode:
Hand-held frequency measuring instrument saves each data that measurement obtains into buffer area, solid according to display screen matrix
The number of fixed point to be shown；Curve graph is directly drawn if the total points of measurement are less than points to be shown, if the total points of measurement are greater than
Points to be shown carry out curve graph drafting after then carrying out extraction processing to total points again；Each new measurement data arrival Shi Junjin
Row tendency chart refreshes.
The shortcomings that prior art:
1, the shortcomings that directly displaying mode:
Points to be shown are secured, user can not observe the trend of big amount measurement data simultaneously；
If fixed points are excessive, measurement data display will appear the shortcomings that tendency chart draws low efficiency when handling, aobvious in real time
Show that effect is poor.
2, the shortcomings that data pick-up mode:
Although can substantially embody data variation trend to showing after data pick-up after securing points to be shown,
Not enough in detail, data distortion；
User it is to be understood that some specific measurement point nearby trend when need to additionally be arranged, should not operate；
Curve is connected to the maximum value of adjacent measurement points array in tendency chart, and each maximum value with minimum value line, is shown again
Showing complicated should not understand.
3, other shortcomings:
The screen resolution of different hand-held frequency measuring instruments is different, and the display mode of fixation measuring points is flexible
Property is poor.
Summary of the invention
For the above-mentioned technical problems in the prior art, the invention proposes one kind to be based on hand-held signal measurement instrument
The tendency chart display processing method of device, design rationally, overcome the deficiencies in the prior art, have good effect.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of tendency chart display processing method based on hand-held signal measurement instrument, includes the following steps:
Step 1: after entering tendency chart display function, judging whether measurement points are greater than maximum show value 10000；
If: judging result is that measurement points are greater than maximum show value 10000, and experiment curv is translated, initial value is repaired
Current points -10000 are changed to, and read 10000 new measurement points；
Or judging result is that measurement points are less than or equal to maximum show value 10000, then judges whether measurement points are big
In or equal to screen resolution；
If: judging result is that measurement points are more than or equal to screen resolution, new array is created, to measurement point data
It is handled；
Or judging result is that measurement points are less than screen resolution, then carries out display processing using original array；
Step 2: tendency chart displaing coordinate system being created according to screen area after data processing；
Step 3: Drawing of Curve is carried out according to measurement point array；
Step 4: judging whether to display points control；
If: judging result is to carry out display points control, is restarted at display according to the points to be shown after control
Reason；
Or judging result is then to carry out tendency chart without display points control and show；
Step 5: terminating.
Advantageous effects brought by the present invention:
That the present invention provides a kind of Refresh Data real-times suitable for hand-held signal measurement instrument is good, measurement result is quasi-
The tendency chart display processing method that exactness is high, user's operation friendly is strong；Have each measurement point arrival and carries out interface refreshing
Real-time display function；Friendly interface display result is provided；Improve the accuracy that user reads tendency chart；Solves difference
Difficulty caused by there are hand-held frequency measuring instrument different screen resolutions to show to tendency chart overcomes fixed point to be shown
Several flexibilities are poor, showing measurement result display refresher rate completely, slow, user specifically understands the neighbouring tendency chart of some measurement point not
The shortcomings that preferably operating.
The present invention be not fixed display points, user can according to current screen resolution ratio calculate tendency chart horizontal axis number of pixels from
And obtaining to make full use of the measurement tendency chart of screen resolution, flexibility ratio is high；
The present invention makes full use of screen resolution, shows experiment curv without distortion completely, and accuracy is high；
The curved section of abscissa of the present invention overlapping is only drawn once, raising tendency chart refreshing efficiency, undistorted display it is same
When still ensure that compared with high real-time.
Detailed description of the invention
Fig. 1 is the context mechanism schematic diagram of display processing method.
Fig. 2 is trend figure structure schematic representation.
Fig. 3 is Drawing of Curve schematic diagram when measurement points are greater than horizontal axis resolution ratio.
Fig. 4 is that tendency chart shows handling principle figure.
Fig. 5 is the schematic diagram that Drawing of Curve is carried out using new array.
Fig. 6 is tendency chart display processing method flow chart.
Fig. 7 is tendency chart display processing method action relationships figure.
Specific embodiment
With reference to the accompanying drawing and specific embodiment invention is further described in detail:
1, context mechanism explanation
This method is applied to the image display module of high-precision hand-held frequency measuring instrument, is responsible for becoming to measurement data
Gesture is shown.Fig. 1 is the context mechanism figure of this display processing method, wherein " tendency chart display interface " is answering for this technology
With support.Hand-held frequency measuring instrument hard ware measure system sends measured data to hand-held frequency measuring instrument software system
System, software systems save data into measurement data buffers, show and use for tendency chart.User is as needed to tendency chart
It is configured, control measurement data reads and modifies display result.
2, trend figure structure schematic representation
High-precision hand-held meter device is more demanding to measure data precision etc., uses trend as shown in Figure 2 herein
Graph structure realizes observation of the user to measurement data trend.Tendency chart includes coordinate system horizontal axis, the coordinate system longitudinal axis, curve graph, cross
Longitudinal axis unit and measurement dot count, wherein horizontal axis indicates measurement points, and horizontal axis finally shows current measurement point number；Longitudinal axis root
The measured value of corresponding points is shown according to measurement function；Curve represents measurement data track.Wherein, horizontal axis maximum value is 10000, works as survey
When amount points are less than 10000, curve increases with measurement point constantly draws compression；When measurement points are greater than 10000, curve is no longer
Compression, is translated.Y direction is according to the maximin auto zoom ratios of all measurement points.
Since hand-held meter device screen is smaller, screen resolution is lower, when measurement points are more than horizontal axis resolution ratio
It will appear the identical phenomenon of the X-coordinate of certain points, as shown in Figure 3.
It being restricted by operating system drawing mechanism and screen resolution, curve can only be plotted on the pixel of integer value,
When the overlapping of certain measurement points, curve can be drawn back and forth between these measurement points.Curve is shown not for a user
There is any variation, but this way greatly wastes software operating rate for application program, herein for this
Phenomenon is optimized to process is drawn.
3, principle explanation
This method is applied to the tendency chart display module of high-precision hand-held frequency measuring instrument, and software running platform is
WINCE7.0 operating system, debugging platform are WindowsXP operating system, and developing instrument is Microsoft Visual
Studio 2005, development language C++, interface are based on MFC class libraries.
Software systems include digital display pattern and image display mode, graphic display mode to measurement data display aspect
It is shown comprising tendency chart and histogram is shown.Wherein tendency chart can help user to see the dynamic fluctuation range of measurement data, with
And the dynamic changing curve of data in specified section is amplified in tracking, this method refreshes measurement data in real time, newly measures number whenever having
When according to arriving, refreshing current curves figure in time, being influenced by operating system memory and resolution ratio, realtime curve function is in data
It will affect measurement rate when measuring big, therefore carry out display processing to this herein and improve, guaranteeing that measurement result is completely distortionless
In the case of improve display rate.
Display interface is divided into multiple regions according to screen resolution by software systems: trend graph region, information area, dish
Single region.Tendency chart area size is obtained by calculation in this method, draws the coordinate system of curve graph to be shown on this basis,
In, coordinate system horizontal axis represents measurement points, and the coordinate system longitudinal axis represents the corresponding measured value of measurement point.Bottom hardware measuring system will
Measurement data is sent to software systems, and software saves the data measured to the memory buffer that can accommodate upper million measurement data
In.
This method disposably reads at most 10000 measurement data in buffer area, if directly carrying out dynamic to total data
Display then needs each adjacent two point carrying out line, when wiring quantity is more than screen resolution, it may appear that measurement point X-coordinate
The phenomenon that overlapping, curve can repeat up and down to draw line segment between the measurement point in same X-coordinate at this time.Therefore, it is measured to improve
Efficiency guarantees the authenticity of real-time display simultaneously, handles the measurement point with identical X value, obtains one group and includes maximum
Value, minimum value, the measurement point of initial value and stop value, label are denoted as i.
New array is created, the measurement point after being grouped again is stored in array, the creation method of new array are as follows:
(1) trend graph region horizontal axis pixel number is calculated, judges whether current measurement point number is big according to initial data array
In pixel number；
(2) all measurement points with same X value are found, and calculates and saves the maximum value in these points, minimum value, rise
Initial value and stop value save these points into new array, and from this group of data directory of 0 beginning label；
(3) curve graph is drawn using new array, it, will be previous in X-direction by max min line in Y direction
The starting point line of the terminating point of array and next array.As shown in Figure 5.
4, process description
Tendency chart display processing method process is as shown in Figure 6.Into after tendency chart display function, whether measurement points are judged
Greater than maximum show value 10000, if more than then to curvilinear translation, initial value is modified are as follows: current points -10000, and read newly
10000 measurement points；Judge whether to be greater than screen resolution if being less than, be pressed at raw mode display less than screen resolution
Reason, new array is then used greater than screen resolution.
Tendency chart displaing coordinate system is created according to screen area after data processing, curve is carried out according to measurement point array and is drawn
System judges whether to display points control, restarts display processing according to the points to be shown after control if control.
5, action relationships explanation
After software systems save measurement data, digital display module and image display module are supplied to according to user demand
It uses.Tendency chart is in close state under default conditions, being continuously increased according to measurement data after tendency chart is opened, to tendency chart
Display processing, the laggard Mobile state that is disposed are shown；When user, which carries out [label | scaling] function, opens operation, tendency chart stops
Refresh, and tendency chart is refreshed according to the setting of display points, datum mark, label etc. again.
The key technology point of beneficial effect is brought to the present invention
1, display points are not fixed, user can calculate tendency chart horizontal axis number of pixels according to current screen resolution ratio to obtain
To the measurement tendency chart that can make full use of screen resolution, flexibility ratio height.
2, screen resolution is made full use of, shows experiment curv without distortion completely, accuracy is high.
3, the curved section of abscissa overlapping is only drawn once, raising tendency chart refreshing efficiency, while undistorted display still
It can guarantee compared with high real-time.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (1)
1. a kind of tendency chart display processing method based on hand-held signal measurement instrument, characterized by the following steps:
Step 1: after entering tendency chart display function, judging whether measurement points are greater than maximum show value 10000；
If: judging result is that measurement points are greater than maximum show value 10000, and experiment curv is translated, initial value is revised as
Current points -10000, and read 10000 new measurement points；
Or judging result is that measurement points are less than or equal to maximum show value 10000, then judge measurement points whether be greater than or
Person is equal to screen resolution；
If: judging result is that measurement points are more than or equal to screen resolution, creates new array, carries out to measurement point data
Processing；
Or judging result is that measurement points are less than screen resolution, then carries out display processing using original array；
Step 2: tendency chart displaing coordinate system being created according to screen area after data processing；
Step 3: Drawing of Curve is carried out according to measurement point array；
Step 4: judging whether to display points control；
If: judging result is to carry out display points control, restarts display processing according to the points to be shown after control；
Or judging result is then to carry out tendency chart without display points control and show；
Step 5: terminating.
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