JPS6132401Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to an indicating controller, and includes:
A novel optical indicating controller using an optical setting display means is provided.

Conventionally, an indicating controller uses a moving coil type indicator, has a multi-needle structure that shares a scale, and is configured to display measured values and set values using different hands.

However, in such conventional devices, the pointer only has the function of displaying the set value, so a variable resistor, etc. must be provided to generate the set value signal, which has the disadvantage of complicating the configuration. .

In order to solve these drawbacks, the present invention
This device uses an optical setting display means to display a setting value and generate a setting value signal by a common means, and will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an example of a setting display device used in the present invention, in which 1 is a display section, 2 is a movable body, and 3 is a case.

The display section 1 includes a large number of light emitting elements, such as light emitting diodes LED ₁ to LED _o , arranged one-dimensionally.

The movable body 2 is movably arranged on the display section 1, and a specific example thereof is shown in FIG. In FIG. 2, 21 is a rod-shaped base, 22 is a photoelectric conversion element, and 23 is an optical transmission fiber. For example, a photodiode is used as the photoelectric conversion element 22. This photoelectric conversion element 22 faces the light emitting diodes _LED1 to _LEDo constituting the display section 1, and is arranged directly on the surface of the base 21 as shown in FIG. As shown in FIG. 2, one end is coupled to the other end of an optical transmission fiber 23 which is arranged so as to be exposed on the surface of the base 21. When placing the movable body 2 on the display section 1, the display section 1 and the movable body 2 may be made of magnetic materials and attached magnetically, or they may be fixed with screws, or the display section 1 may be mounted on the display section 1. The cursor structure may be such that a cut groove is provided on the side surface of the movable body 2 and the end of the movable body 2 is fitted thereinto via a plate spring.

The case 3 houses internal components of the device.

In such a configuration, the light emitting diodes LED ₁ to _{LED o} that constitute the display section 1 are driven to display measured values. In this case, the light emitting diode
It may be a scan drive in which LED ₁ to _{LED o} are sequentially turned on at a cycle that does not cause flickering, or a static drive in which desired light emitting diodes are turned on at the same time. As a result, the display unit 1 performs a bar graph display in which diodes emit light in a predetermined area corresponding to a measured value in a band-like manner, or a spot display in which light emitting diodes at positions corresponding to the measured value shine strongly. On the other hand, the photodiode 22 of the movable body 2 is
A photoelectric conversion current is generated by detecting light emission from a predetermined opposing light emitting diode LED. Therefore, by using the output current of the photodiode 22 of the movable body 2 as a setting signal, an indicating controller can be realized.

FIG. 3 is a block diagram showing an embodiment of the present invention, in which 4 is a movable body position detection circuit, 5 is a computing unit, 6 is an operating section, 7 is a controlled object, 8 is a converter, and P
is the addition point. An output signal from a photodiode 22 of the movable body 2 is applied to a movable body position detection circuit (hereinafter abbreviated as a detection circuit) 4, and an output signal of the detection circuit 4 is applied to one of the summing points P. The output signal of the summing point P is applied to the arithmetic unit 5, and the output signal of the arithmetic unit 5 is applied to the operating section 6. The output signal of the operating section 6 is applied to the controlled object 7, and the output signal of the controlled object 7 is applied to the other side of the summing point P via the converter 8, and is also applied to the display section 1. That is, the detection circuit 4
From , a signal corresponding to the position of the movable body 2 is added as a set value signal Sa to one of the summing points P,
From the converter 8, a signal corresponding to the controlled variable of the controlled object 7 is converted into a signal of the same type as the setting value signal Sa, and is added to the other side of the summing point P as a feedback signal Sb. A deviation signal Sc obtained by comparing the value signal Sa and the feedback signal Sb is applied to the calculator 5. Arithmetic unit 5
performs predetermined judgments, PID calculations, etc., and sends a command signal Sd for corrective action to the operating unit 6, and the operating unit 6 corrects the controlled object 7 so that it outputs a control amount that matches the set value. A signal Se is sent out. The control amount is converted into the feedback signal Sb by the converter 8 as described above. This causes the signal to circulate within the feedback loop until the controlled variable matches the set value.

In such a configuration, the set value is set by the position of the movable body 2 on the display section 1, and the control amount of the controlled object 7 is displayed as a measured value by light emission from the light emitting diodes _LED1 to _LEDo on the display section 1. . The set value is the photodiode 2 of the movable body 2.
2 is detected based on the photoelectric conversion signal, and the arithmetic unit 5
sent to. Here, the detection of the set value is performed, for example, as follows. That is, the light emitting diodes LED ₁ to LED _o of the display section 1 are scan-driven. When performing this scan, two modes, a first scan and a second scan, are set, for example, as shown in FIG. 4, and the scan is performed alternately according to these modes. In the first scan mode, the light emitting diodes LED ₁ to LED _o are lit in a strip or spot to display the measured value, and in the second scan mode, the light emitting diodes LED ₁ to LED _o are lit in sequence at a constant speed. In this second scan mode, a photoelectric conversion current is sent out in a pulsed manner from the photodiode 22 of the movable body 2.
Therefore, by determining the time T from the start pulse to the output pulse sent from the photodiode 22 in the second scan mode,
The position of the movable body 2, that is, the set value can be determined. This calculation is performed by the detection circuit 4 in this embodiment. Note that the second scan is performed in a shorter time than the first scan. The detection accuracy of this set value can be made higher than the arrangement density of the light emitting diodes LED ₁ to _{LED o} by performing arithmetic processing. That is, the photodiode 22 outputs the strongest pulse in accordance with the output light of the opposing light emitting diode, but also outputs a pulse in response to the output light of the light emitting diode adjacent to the opposing light emitting diode. Therefore, by calculating the amount of change in these pulses in advance and associating it with the change in position, the position of the movable body 2 can be detected with higher accuracy.

As is clear from these, according to the present invention,
The indicating controller can be realized with a relatively simple configuration without separately providing a set value display means and a set value signal generating means as in the past.

It goes without saying that an on-off controller can also be realized by using a plurality of movable bodies.

Further, in this embodiment, an example is shown in which a light emitting diode is used as the light emitting element constituting the display section 1 and a photodiode is used as the photoelectric conversion element 22 of the movable body 2, but the present invention is not limited to this.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a setting display device used in the present invention, Fig. 2 is a structural explanatory diagram showing a specific example of a movable body used in Fig. 1, Fig. 3 is a block diagram showing an embodiment of the present invention, and Fig. 4 is a mode diagram for explaining the operation of the device in Fig. 3. 1 ... display unit, 2 ... movable body, 3 ... case,
4: movable body position detection circuit, 5: computing unit, 6:
...Operation unit, 7...Controlled object, 8...Converter.

Claims (1)

[Scope of utility model registration request] It has a display section that displays the value of an output signal to be controlled, which is made up of a large number of light emitting elements arranged one-dimensionally, and a photoelectric conversion element that faces the light emitting elements of this display section, and is movably arranged on the display section. a detection circuit that applies a signal corresponding to the position of a predetermined movable body of the setting display device to one of the summing points as a set value signal; and an output signal of a controlled object. a converter that converts the signal into a signal of the same type as the set value signal and applies it to the display section of the setting display device and the addition point; and a calculator that performs a predetermined calculation based on the deviation signal sent from the addition point. and an operating section that sends a correction signal to a controlled object so that the deviation signal sent from the summing point becomes zero based on the command signal of the arithmetic unit.