JPH0399224A - Pointer-type analog meter - Google Patents

Abstract

PURPOSE:To enable a user to read the indication readily by forming a scale with a liquid display pipe, and making it possible to display only the scale corresponding to a signal to be measured or the scale corresponding to a display range. CONSTITUTION:When a mode switch 5 is switched to a voltage measuring mode, only a scale 2a displaying a voltage with a liquid display pipe is displayed. When the switch 5 is switched to a current measuring mode, only a scale 2b displaying a current with a liquid display pipe is displayed. When the switch 5 is switched into a level measuring mode, only a scale 2c displaying a level with a liquid display pipe is displayed. Furthermore, only the scale for corresponding display range can be displayed in response to the switching of the range.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to pointer-type analog meters that measure and display signal values in measuring instruments, tape recorders, amplifiers, etc. The value can be measured and displayed, or the signal display range can be selected and displayed.

[Prior Art] Generally, measuring instruments measure and display the values of multiple different signals such as voltage and current, or select and display the display range of the signal to be measured (switching the range). In a device that uses a pointer-type analog meter as such a measuring device, it is possible to
Alternatively, different scales are provided approximately concentrically over the movable range of the pointer for each selected display range. An example of the display section of this measuring instrument is shown in FIG. In FIG. 5, reference numeral 1 is the display section of the meter, and scales 2a, 2b
, 2c are depicted.

[Problems to be Solved by the Invention] In the pointer-type analog meter used in the above-mentioned measuring instruments, it is difficult to adjust the value indicated by the pointer during measurement to the type of signal to be measured or the display range of the signal to be measured. It is read by the corresponding scale 2a, 2b or 2c. Therefore, if you read the value indicated on the pointer by using the wrong scale, you will read a completely different value.

For this reason, in the past, each scale had a different color, but even this could not sufficiently prevent the above-mentioned mistakes.

The present invention eliminates the above-mentioned drawbacks and provides a pointer-type analog meter that does not make mistakes when reading the scale.

[Means for Solving the Problems] In order to solve the above problems, the present invention measures and displays the values of a plurality of different signals, or selects and displays the display range of the signal to be measured. A pointer-type analog meter that has a different scale over the movable range of the pointer for each of the different signals or selected display ranges, the scale is formed by a liquid crystal display tube, and the measurement Only the scale corresponding to the signal to be displayed or the scale corresponding to the display range can be displayed.

[Function] In the pointer-type analog meter as described above, the scale of the signal to be measured or the scale of the range to be displayed is automatically displayed in response to switching to accept the signal to be measured or switching of the range. Therefore, you will not accidentally read the depth value indicated by another scale pointer.

[Example 1] An example of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, reference numeral 3 denotes a pointer-type analog meter, and a liquid crystal display tube (not shown) is disposed on the back of the meter. This liquid crystal display tube has the scale 2 a - 2 b s 2 described as the conventional example in FIG.
It has c. Reference numeral 1 indicates a display section, 4 meters and 30 pointers, 5 a mode changeover switch, and 6 a drive circuit for the meter 3. When the mode changeover switch 5 is switched to the voltage measurement mode, only the scale 2a for displaying voltage is displayed on the liquid crystal display tube as shown in FIG. When the mode selector switch 5 is switched to the current measurement mode, the scale 2b displays the current on the liquid crystal display tube as shown in FIG.
only is displayed. Further, when the mode changeover switch 5 is switched to the level measurement mode, only the scale 2C for displaying the level is displayed on the liquid crystal display tube as shown in FIG.

In the above embodiment, only the scale corresponding to the measurement of different types of signals is displayed, but it is also possible to display only the scale in the corresponding display range according to the switching of the range.

[Effects of the Invention] As described above, the present invention is a pointer-type analog meter that measures and displays the values of a plurality of different signals, or that selects and displays the display range of the signal to be measured, In the device in which a different scale is provided over the movable range of the pointer for each different signal or for each selected display range,
Since the scale is formed by a liquid crystal display tube so that only the scale corresponding to the signal to be measured or the scale corresponding to the display range can be displayed, it is possible to mistakenly read the displayed value of the pointer using another scale. Things will go away.

Furthermore, when the present invention is applied to a level meter such as a table recorder, it can function as a level meter that displays the normal music signal level, and as a calibration meter that calibrates the bias amount according to the characteristics of the tape being used. By preparing a scale corresponding to each type and switching the display, the user can read the instructions extremely easily.
I can do that.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a pointer type analog meter and attached circuit showing an embodiment of the present invention, Figs. 2 to 4 are front views showing the display section of the meter shown in Fig. 1 above, and Fig. 5 is a conventional one. FIG. 3 is a front view showing the display section of the meter. 1: Display section, 2a, 2b, 2c: Scale, 3: Meter, 4
= Pointer, 5: Mode selection switch, 6: Drive circuit.

Claims (1)

[Claims] (1) A pointer-type analog meter that measures and displays the values of a plurality of different signals, or that selects and displays the display range of the signal to be measured, and for each of the different signals,
Or, in a device in which a different scale is provided over the movable range of the pointer for each selected display range, the scale is formed by a liquid crystal display tube, and the scale corresponds to the signal to be measured, or the scale corresponds to the display range. A pointer-type analog meter characterized by being able to display only a scale.