JPH0528282A - Recorder with input monitor - Google Patents

Abstract

PURPOSE:To properly set a scale parameter in a short time by displaying a peak value from the time of starting the change of the scale parameter to the point of a present time in accordance with a changed scale value when there is the change of the scale parameter. CONSTITUTION:A displaying part 4 displays the size of an analog input signal under the operation control of CPU 2 based on a digital signal converted/ outputted from an A/D converter 1. A parameter setting part 5 sets various parameters including the scale parameter to simultaneously decide the both end scales of a recording part 3 and a display part 4. The peak value of the analog input signal in the period of the series of the scale parameter setting work is updated/displayed at the display part 4 of which parameter is changed in common with the recording part 3. Thus, the scale parameter of the recording part 3 can be set to be a proper value considering the change of the analog input signal while referring to the peak value displayed on the display part 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recorder with an input monitor and, more particularly, to improvement of optimum setting of scale parameters.

[0002]

2. Description of the Related Art Generally, when measuring and recording an analog input signal with a recorder, a scale parameter such as a measurement range and a recording position is preceded before execution of a measurement recording operation.
Settings are made. Conventionally, when setting such a scale parameter, the scale parameter is appropriately changed to perform recording, and while confirming the recording result at each scale parameter, it is set at a desired position on the recording paper. The recording result of a desired recording range is obtained.

[0003]

However, according to such a conventional method, the quality of the scale parameter cannot be determined unless the recording operation is actually executed, and the appropriate scale is not determined.
There is a problem that it takes a relatively long time to set the ru parameter. The present invention solves such a conventional problem, and an object of the present invention is to realize a recorder with an input monitor capable of setting appropriate scale parameters in a short time.

[0004]

SUMMARY OF THE INVENTION The present invention provides a recorder with an input monitor, which comprises a recording section and a display section for monitoring an analog input signal to be recorded, and a scale parameter for the recording section and the display section. , A parameter setting section for setting the same, and a peak value display section for displaying while updating the peak value of the analog input signal during a series of scale parameter setting work on the display section. It is characterized by being provided.

[0005]

In the display section in which the scale parameter is changed in common with the recording section, the peak value of the analog input signal during the series scale parameter setting work period is updated and displayed. As a result, the scale parameter of the recording section can be set to an appropriate value in consideration of the change of the analog input signal while referring to the peak value displayed on the display section.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
In the figure, 1 is an A / D converter, which converts an analog input signal into a digital signal and applies it to the CPU 2. In addition,
In the case of a recorder which measures and records analog input signals of a plurality of channels, the A / D converter 1 may be provided for each channel, or a single A common D / A converter may be provided via a multiplexer. It may be added to the / D converter.

A recording unit 3 records the magnitude of the analog input signal under the arithmetic control of the CPU 2 based on the digital signal converted and output from the A / D converter 1. A display unit 4 displays the magnitude of the analog input signal under the arithmetic control of the CPU 2 based on the digital signal converted and output from the A / D converter 1.

Reference numeral 5 is a scale at both ends of the recording unit 3 and the display unit 4.
This is a parameter setting section for setting various parameters including scale parameters for simultaneously determining the parameters, for example, ± 1 mV- ± 2 mV- ± 5 mV for setting the measurement sensitivity.
-± 10 mV -...- ± 50 V- ± 100 V -... measurement range, vernier range for setting any measurement range outside these range series such as ± 1.5 V, zero position of measurement range is arbitrary Set the scale parameters of the recording unit 3 and the display unit 4 such as the zero position set at.

A ROM 6 stores fixed data such as programs of the CPU 2. Reference numeral 7 denotes a RAM, for example, as shown in FIG. 2, an area 71 for storing the measurement data converted and output from the A / D converter 1, a positive peak value storage for storing a positive peak value. Area 72, negative peak value storage area 73 for storing negative peak values, parameter setting section 5
Scale parameters for storing scale parameters such as range, vernier range, zero position, etc.
A data storage area 74 is provided. This RAM
7 shows various setting data related to the recording operation of the recording unit 3.
An area for storing data is also provided, but not shown.

In such a structure, the CPU 2 has various parameters set by the parameter setting unit 5 and RO.
Programs stored in M6, various fixed data, RA
The operation of each unit including the recording unit 3 and the display unit 4 is controlled and controlled on the basis of various variable data temporarily stored in M7, and the analog input signal is displayed and recorded.

As the recording unit 3, for example, a line thermal head in which a large number of heating elements are arranged over the effective recording range of a thermal recording paper is used as a recording head, and recording is performed while the recording paper is running at a desired set speed. The waveform of the analog input signal is recorded on the recording paper by selectively driving the desired heating elements in accordance with the data. Specifically, for example, 8 channels of analog input signals are recorded by allocating 40 mm per channel at regular intervals on a recording sheet having a recording width of 370 mm.

As the display unit 4, CRT, EL, liquid crystal or the like is used. The display unit 4 has various parameters set by the parameter setting unit 5 in accordance with the operation mode and the working mode.
Displays the analog input signal bar graph and waveform for each measurement channel.

FIG. 3 is a display example diagram of the display unit 4 of FIG.
The bar graph display during scale parameter setting work of an arbitrary measurement channel is shown. CPU1
Displays the analog input signal for a certain period of time based on the digital signal converted and output from the A / D converter 1, calculates the display position on the bar graph, and displays the bar graph.

In FIG. 3, (a) shows that the scale value SL at the left end of the bar graph is set to 2.0 V and the right end is set by setting the range to ± 2 V and the zero position to the center. This is an example in which the scale value SR is set to -2.0V, and in (b), the range is set to ± 1.5V and the zero position is set to a position shifted to the right by 0.5V from the center. This is an example in which the scale value SL at the left end of the bar graph is set to 2.0V and the scale value SR at the right end is set to -1.0V. These scale parameters are set as common to the recording section 3 and the display section 4, as described above. Here, the scale values SL, S
R is P + is a positive peak value from the start of the scale parameter setting work to the present, and P- is the positive peak value from the start of the scale parameter setting work to the present. The negative peak value in between, PV, is the current amplitude value of the analog input signal.

FIG. 4 is a flow chart showing the flow of the monitor display processing of the analog input signal by the bar graph display as shown in FIG.
It's a chart. In the case of a plurality of input channels, such monitor display processing is started by selecting a measurement channel to be processed. On the other hand, since the scale parameter setting process is performed in parallel with the monitor display process, the parameters for determining the scale values at both ends are changed. Therefore, in the first step of loop 1, these scale parameters are read from the scale parameter storage area 74 of RAM 7, and then the scale values at both ends of the bar graph are determined and scaled. Store in the ru parameter storage area 74.

Thereafter, in the loop 2, the reading of the analog input signal converted into the digital signal and stored in the measurement data storage area 71 of the RAM 7 is made constant based on the display update time preset in the ROM 6. Determine the amplitude of the bar graph display based on the scale value determined over time. At this time, the amplitude of the analog input signal is either the positive peak value storage area 72 or the negative peak value storage area 7
If the past peak value stored in 3 is exceeded, the peak value is updated and stored as a real value in the corresponding storage area 72 or 73, and their display positions are according to the latest scale value. Calculated.

Then, according to these calculation results, the amplitude and the peak value of the analog input signal are displayed on a common bar graph display section as shown in FIG. The operator sets an appropriate scale value so that the peak value is displayed in the bar graph display area while watching such a bar graph display. In this way, when a desired scale value can be set, a series of range setting work for the selected channel ends, and at the same time, the monitor display process also ends. When performing range setting work for other channels continuously, a desired channel is selected and designated. As a result, similar processing is executed according to the flowchart of FIG.
It should be noted that recording paper can be saved by performing such range setting work while the recording operation of the recording unit 3 is stopped, but it can also be performed during the recording operation.

On the other hand, the scale parameters of the recording unit 3 are also
The same value is set at the same time when the display unit 4 is set. Therefore,
By setting the scale parameter of the display unit 4 to an appropriate value that the peak value is displayed in the bar graph display area,
The amplitude of the analog input signal can be stably recorded including the case where the amplitude corresponding to the past peak value is reached in the allocated recording area of the recording unit 3.

Although FIGS. 3 and 4 have described the example in which the bar graph is displayed on the display unit, the waveform may be displayed as shown in FIG. In FIG. 5, SU is an upper scale value, DU is a lower scale value, and P + is a positive peak value from the start of the scale parameter setting work to the present. Line, P- is the scale parameter
The display line PV representing the negative peak value from the start of the data setting operation to the present, PV is the current waveform of the analog input signal. Also in this case, even if the scale values at the upper and lower ends change due to the change of the scale parameter, the latest scale after the change
Since the past peak values P + and P- are displayed according to the rule values, the recording conditions of the recording unit 3 can be appropriately set in a short time.

[0020]

As described above, according to the present invention,
If there is a change in the scale parameter from the start of the change of the scale parameter to the present time, it will be displayed according to the changed scale value. You can set the parameters properly in a short time while looking at the display monitor.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an example of an area of a RAM used in FIG.

FIG. 3 is a display example diagram of a display unit in FIG.

FIG. 4 is a flowchart illustrating the display process of FIG.

5 is a diagram showing another display example of the display unit of FIG. 1. FIG.

[Explanation of symbols]

 1 A / D converter 2 CPU 3 recording unit 4 display unit 5 parameter setting unit 6 ROM 7 RAM

Claims (1)

Claims: 1. A recorder with an input monitor comprising a recording section and a display section for monitoring an analog input signal to be recorded, wherein the recording section and the display section have a common scale parameter. And a peak value display section for displaying while updating the peak value of the analog input signal during a series of scale parameter setting work period. Recorder with input monitor characterized by