DE2165636B2 - Method for displaying the course of measured values over time on the screen of a display device - Google Patents

Description

The invention relates to a method for displaying the time course of measured values on the Screen of a viewing device as described in the preamble of claim 1.

In principle, all circulating memories such as disk, drum or Runtime memory can be used. Preferably, however, shift registers are used. In general a measured value is assigned to each line of the display unit! Often the number of stored Measured values not selected as large as the number of lines. This is useful because during the A larger number of lines are blanked out when the image is reversed in display units. For viewing devices whose Number of lines cannot be changed, as is the case, for example, with the usual line grid systems Display devices, no values are displayed in a number of lines. From the refresh memory the measured values are output in such a way that, after the frame return pulse, the one in the first memory location of the frame repetition memory is output and in one of the first lines is pictured. The next line shows the content of the next memory location, and so on to the last memory location of the shift register. Then the shift clock pulses are blocked and only released again after the frame return pulse, so that the content of the first memory location again is displayed in one of the first lines of the image.

In the method proposed in the main patent, the content of the image repetition memory constantly displayed on the screen of the display unit, so that after a new value has been written in, what generally occurs at equidistant time intervals, the curve shown in the direction of the time axis is moved. This means that not only the latest measured values, but also the previous measurement results are also displayed. If the measured values are shown at the top of the screen, then the oldest measured values disappear at the bottom of the screen.

The present invention is based on the idea that a system can be operated more cheaply can, if not only the current measured or actual values are displayed, but also the setpoints, e.g. the measured values of the corresponding time of the previous day are shown, for example in such a way that at least the upper edge of the image field Setpoint is shown, which applies to the newest actual value, that then after a gap the newest actual value and then in a curve the wide-

older actual values can be displayed. Of course, a similar representation can also be made from left to right or from bottom to top.

The present invention is based on the object of creating a method and an arrangement for such a representation of setpoint and actual values α. According to the invention, this object is achieved in that to display setpoint values in television lines si ... s «and actual values in lines il ... ir, with no values being displayed in lines sn ... il , the content of the storage space for the line in is deleted and the new actual value is entered in the memory location for line il-1 and that the oldest actual value in the memory cell for line ir is deleted, all other actual values and the setpoints are shifted by one memory location and the setpoint associated with the new actual value is stored in the memory location for line si. A single memory is therefore used for the setpoint and actual values.

While with the method according to the main patent individual series of measured values by restoring the Measured values are shifted in a frame repetition memory perpendicular to the line direction With the new method, two diagrams displayed one above the other are shifted perpendicular to the direction of the rows. This is achieved by modifying the transferring process described in the main patent. This modification consists in extending the method according to the main patent to a type of representation in which two diagrams of each a series of measured values.

The method described can be carried out in various ways by changing the sequence of the individual method steps. An arrangement with which several process steps can be carried out at the same time is characterized in that the image repetition memory contains a memory with r locations, that it subsequently has an input register for the actual values, and that it in turn has a memory with k-1 after it Storage locations contains that this is followed by a clear register and then a memory with HI locations, which is followed by an input register for the setpoints, and that an output register is provided, the content of which is compared with the content of a clock pulse with one during the display of each television line to the line frequency high frequency summing grid counter is compared in a comparator, which emits a signal causing the illumination of the electron beam of the display device when the contents are identical and that a device for shifting the values by a memory location and an address counter is provided, the content of which is the Num indicates the storage locations in the output and input registers.

With reference to the drawing, in the exemplary embodiments of the invention are shown, are in the following the invention and further advantages and additions are described and explained in more detail.

It shows

Fig. 1 is a block diagram of an arrangement with which the new method in successive Steps can be done, and

2 shows an arrangement with which several method steps can be carried out at the same time.

In Fig. 1, 1 denotes a display device that is connected to a pulse center 2 . The display device 1 and the pulse center 2 can be part

a normal commercial industrial television system. The pulse center 2 forms the vertical and horizontal synchronous and blanking signals from pulses which are fed to it from a step-down circuit 6, which in turn is controlled by a clock generator 5. If the clock frequency is ζ. Β. 8 MHz, corresponding to the highest frequency video signal, then the line deflection frequency of 15,625 Hz is generated by frequency division at a ratio of 640: 1 and the refresh rate of 50 Hz is generated by division at a ratio of 200,000: 1. The light button signals for the display device 1 are formed by the pulse center 2 from pulses that it receives from a comparator VGL. This compares the content of a raster counter RZ with that of an output register 9 of an image repetition memory 8. The raster counter RZ is reset by the line-frequency pulses of the pulse scaler 6 at the start of the display of each line and then sums up the output pulses of the clock generator 5. Before the start of the recording, the value contained in the image repetition memory 8 was shifted into the output register 9, which is to be displayed in the line scanned by the electron beam. The circulation of the values in the image repetition memory 8 and the register 9 is controlled by an address counter 17 which also contains the horizontal and vertical frequency output pulses of the scaler 6. In this way, it contains the information about when to start displaying an image and a line. By adding up the line-frequency pulses, it always contains the number of lines displayed. With this information he is able to control the circulation in the frame repetition memory and thus the output of the value stored in this at the right moment. Furthermore, he can write a value output by a computer 7 on a line Inf into the memory location with the address output by the computer 7 on a line Adr by setting a gate circuit Tl, the output of which with the Input and output register 9 is connected, opens. This means that a new value can be entered at any memory location in the image repetition memory 4.

which is shown in a corresponding line on the display device 1. Will the Address counter 17 is supplied with an additional pulse or the image repetition memory 8 a number of impulses that would be required to maintain its content

to shift one value further, less is supplied, this means that all values that are in Image repeat memories are included to be moved to a memory location and thus the displayed The measured value curve on the display device 1 is shifted by one line.

With the new method, the type of representation of Target and actual values can be achieved. From an ordinate axis 31, corresponding to the television line si,

should initially be displayed in a few lines up to line sn target values 34. Below these nominal values, there are k lines in which no values are shown. From a /. Wide ordinate 33 then follow

starting with line / 1, the actual values, the newest actual value immediately following ordinate 33. If necessary, labels on the edge can be used to indicate the areas in which the setpoints and the actual values are located. On the light key the ordinate axes 31 and 33 can optionally be dispensed with.

The arrangement according to Fi g. 1 can be operated in several ways, e.g. B. in the so-called "scribe" and in the »Freely positioned« operating mode. In the recorder mode, the computer 7 does not give a separate one Write address, but the new value is written into a memory location whose Address is contained in a register 37. The values are therefore always saved in the same memory location. Furthermore, with each new value being written in, all Measured values moved to a memory location. This type of representation corresponds to that of a normal scribe, its pen, depending on the amplitude of the measured value to be displayed, only moves horizontally Moved direction, but the curve moves down as a whole as a result of the paper transport. In the As already mentioned, the new measured value is transferred to the “free-positioned” display type registered address issued separately. In this operating mode, an old value is entered in each case replaces a newer value without shifting the measured value curves as a whole.

With the arrangement according to Fi g. 1 will now be the new one Procedure carried out as follows:

Assume that the refresh memory has already been loaded with setpoints and actual values, namely in the first ten memory locations Setpoints written in, the following ten memory locations should be kept free so that during the In the illustration, there is a gap between the setpoint and actual values, and finally another 200 Storage locations that contain actual values. If a new actual value is to be written in, then the following runs Process. First of all, the »Free Positioned« operating mode is selected. Then the Address 10 is selected and the information 0 is entered in the memory cell with this address, so that the The setpoint previously in this address has been deleted. Then the address 20 issued. There was previously no value in the memory location with this address. In it now becomes the newest Actual value entered. Then switch to "recorder mode" and transfer the setpoint associated with the latest actual value, which is the one for this operating mode is automatically entered in the memory location with address 0. It will also be automatic all other values shifted by one memory location.

By writing the information 0 in the memory location with the address 10, it is ensured that that even after writing an actual value into the memory location with the address 20 there is a gap of ten Lines between the setpoints and the actual values are retained. So that is initially in the storage space with address 10 do not contain a value, and the newest actual value is stored in the memory location with the Address 20 shown. But since the newest setpoint is entered in the recorder mode, it is after completion the original storage space allocation is maintained during the writing process.

In the example it was assumed that only ten setpoints and 200 actual values are displayed. Instead of it is also possible, e.g. B. to compare 90 setpoints and 100 actual values.

F i g. 2 shows an arrangement with which a

such a representation of setpoint and actual values is achieved, but with which the writing process is shortened. RZ again denotes the raster counter which sums up the output pulses of a clock generator TG which, among other things, includes the one shown in FIG

ίο with 5 designated clock generator and the coaster 6 contains. The content of the raster counter RZ is compared in a comparator KGL with the content of an input and output register Rl of the image repetition memory. In the case of equality of content

¹ S, the comparator VGL controls the clock generator TG , which then supplies a signal via a line 56 which causes the electron beam of the display device to be illuminated. The image repetition memory also contains two further input registers Rl and R3 as well

² <> three memories SpI, Sp2 and Sp3. Another register A4 can be switched on if necessary, as will be explained further below. In the exemplary embodiment, for the sake of simplicity, it is assumed that the values only have a maximum size of 4 bits.

»Δ It is also assumed that the top ten lines show the setpoint values and 200 actual values ten lines apart. Under this assumption, the memory SpI has a capacity of 199 X 4 bits, the memory SpI of 9 X 4 bits and the memory Sp3 likewise of 9 × 4 bits. The registers Rl, Rl, Ri and A4 each have four digits.

The arrangement according to FIG. 2 is connected to the computer via two channels 57, 58. Across the canal 58 are the setpoints and actual values as a single word

transferred to an input register. A takeover pulse given to a takeover and write control US via channel 57 triggers the takeover and writing process. First, the word output by the computer is triggered by an impulse

taken on a line 53 in the input register ER . The setpoint value to be written into the image repetition memory is then in the left half and the actual value is in the right half. The control US now waits until the clock TG

a signal is set on the line Sl. This is the case when the oldest actual value is in the input and output register Rl. At the same time, the setpoints are in memory Sp3 and in register A3. There are no values in the memory SpI and in the register Rl

so included; the memory SpI is filled with the remaining actual values. In this state of the image repetition memory, the takeover and write control US sends a signal on the line S4. This has the effect that the latest setpoint value is entered in register R1

is accepted, so that the oldest actual value is overwritten with the newest setpoint. At the same time, the latest actual value is transferred to register Λ2. The oldest setpoint in register R3 is deleted. This results in the following charging

State of the image repetition memory:

The setpoint values are in the order in which they are entered in register A1 and in memory Sp3, the spaces are in register A3 and in memory Sp2 and the actual values are in register Rl and

the memory SpI.

Now all values have to be shifted by one place. To this end, the takeover and write control US sends a signal to the line S2

of the duration of one picture period, which switches a changeover switch Tl in such a way that the register R4 is switched into the frame repetition memory for one cycle, so that after one cycle all values are shifted by a word length of 4 bits. Of the

The latest setpoint is then shown below the ordinate axis 31, the newest actual value is 20 TV lines lower and the 199th actual value is now the oldest shown in the 200th TV line, d. H. the curves are shifted by one TV line.

For this purpose 2 sheets of drawings

Claims (4)

Patent claims: 1. A method for displaying the course over time of a number of those available in digital form Measured values as a diagram on the screen of a display device, in which the measured values are stored in an image repetition memory, from which they are cyclically fed to the display device and in which the oldest measured value is deleted after the arrival of a new measured value, all other measured values are shifted by one memory location and the new measured value is stored in the first free memory location the electron beam in the viewer! line by line across the screen and the direction perpendicular to the line direction is the direction of the time axis, in which at the beginning of the scanning of each line a preset counter is loaded with the value to be displayed in this line and stored in the image repetition memory, in which, while the electron beam is brightly or blanked across the screen, clock pulses are fed to the preset counter and the current strength of the electron beam is changed after reaching the preset number of pulses, according to main patent 1808245, characterized in that for displaying setpoints in television lines sl ... sn and actual values in Lines il ... ir, whereby no values are displayed in lines sn ... il , the content of the memory location for line sn is deleted and the new actual value is entered in the memory location for line / 1-1 and that the The oldest actual value in the memory cell for the row ir is deleted, all others Actual values and setpoint values are shifted by one memory location and the setpoint associated with the new actual value is stored in the memory location for line si. 2. Arrangement for carrying out the method according to claim 1, characterized in that the image repetition memory contains a memory (SpI) with r-1 places for the actual values that it then has an input register (R2) for the actual values that it in turn in Connected to it contains a memory (Sp2) with M memory locations that is followed by a clear register (R3) and then a memory (Sp3) with n-1 locations, which is followed by an input register (Rl) for the setpoint values, and an output register (Al) is provided, the content of which is compared with the content of a during the display of each television line clock pulses with a high frequency compared to the line frequency on summing raster counter (RZ) in a comparator (VGL) , which a light key when the content is the same emits the signal causing the electron beam of the display device, and that a device for shifting the values by a memory location and an address counter v is provided, the content of which indicates the numbers of the storage locations in the output and input registers. 3. Arrangement according to claim 2, characterized by a device which, after the registered letter new values to the address counter supplies additional impulse. 4. Arrangement according to claim 2, characterized in that the image repetition memory is designed as a shift register and that an additional register (A4) the length of a value is provided before or after the writing of new values during a circulation cycle is switched on in the shift register forming the image repetition memory.