JPH01201701A - Controller by using rotary variable resistor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a control device using a rotary variable resistor.

2. Description of the Related Art In general, equipment that is equipped with a control device for driving the equipment and a setting value changing device for setting the control state in advance in the control equipment is driven as shown in Fig. 3. a load group 41 for controlling the load group 41, a control section 42 for controlling the driving state of the load group 41, a set value changing section 43 for setting the control state of the control section 42, and a display section for displaying the set values. It consists of 44. 'In the device 1 having such a configuration, a variable resistor 43m is used as the set value changing section 43 as shown in Figure 4, and in particular, a rotary variable resistor (hereinafter referred to as a volume) is used. Generally, the resistance value varied by the volume is replaced with a voltage value divided from the applied voltage Vcc and input to the control unit 42.

As shown in FIG. 5, the resistance value of this volume varies depending on the rotation angle. In general, the MIN of the rotation angle in Figure 5
It is designed to operate only from point to MAX point, and is used only within that range. However, even if this is not the case, after showing the maximum resistance value as shown in Figure 5, CHAN
Since the resistance value decreases to the minimum value at point G (usually 360 degrees), the usable range is almost the same as that described above.

Today, many devices use a microcomputer (hereinafter referred to as a microcomputer) as the control unit 42, and a microcomputer that has an analog input terminal with an A/D conversion function is used to input signals as shown in Figure 5. It is used. The analog voltage set from the volume is, for example, 0.1.2.3,...9, A, B,...
. . . They are replaced with hexadecimal values such as D and ElF, resulting in an input state as shown in FIG. 6, and are used as setting values on the microcomputer software program.

There is also a method of using an encoder 43 as a setting value changing section instead of the volume, as shown in FIG. This is so that when rotated, the transmitting side rotation detecting element 44 and the receiving side rotation detecting element 45 output a pulse signal to the control unit each time the transmitting side rotation detecting element 44 passes the position of the receiving side rotation detecting element 45. It has become.

Problems to be Solved by the Invention However, when the volume is used in the manner shown in Figure 4, the variable range is the range in which the volume can operate, that is, from the minimum value to the maximum value in terms of resistance value. It will only be between.

For example, if the operating rotation angle is set as shown in Figure 5, it will change from the MIN point to the MAX point, and even if the operating rotation angle is infinite, it will change from the MIN point to the MAX point.
It is possible to change the resistance value only up to the point. Then, when it is input to the microcomputer and A/D converted, the microcomputer can only vary it from 0 to F, as shown in FIG. 6, and the range that can be set is limited.

In addition, when using an encoder, the rotation axis can rotate as much as you like, and the range of settings that can be selected is infinite. However, encoders are very expensive compared to volumetric drives.
Furthermore, the resolution is poor and the number of pulses output per rotation is small, making it difficult to change settings more precisely.

The present invention was invented in view of these points, and is aimed at improving the performance of a control device using a volume.

Means for Solving the Problems In order to achieve the above object, the control device using the volume of the present invention has a minimum resistance value when the rotation angle is 0 degrees,
A set value changing means equipped with a rotary variable resistor that exhibits a maximum resistance value when the rotation angle is arbitrarily determined within 360 degrees, for example, just before 360 degrees, and whose operating rotation angle is infinite. , A/Dffl conversion means for converting the analog signal from the set value changing means into a digital signal at regular intervals, storage means for storing the previous value and current value of the A/D converted digital value, and storage means. Comparing means for calculating the difference between the stored previous value and the current value; and rotation angle determining means for determining in which direction and how many times the rotary variable resistor has rotated based on the difference calculated by the comparing means. , and set value calculating means for calculating a set value using rotation angle determining means.

Function: With the above configuration, the present invention can realize an encoder-like operation at the same cost as a volume, and can improve the performance of the set value changing means of the control device.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a configuration diagram of the display and operation parts of the oil hot air fan heater and the control unit that controls them. 1 is the main body of the oil hot air fan heater, 2 is the current time and timer settings. 3 is a display unit that displays the time; 3 is a volume that changes the status of the display unit between the time setting display and the current time display; and 6 is a volume that has an infinite rotation angle; and 6 controls the above-mentioned components. This is the control section.

Here, the above-mentioned time setting is performed, that is, the current level of the volume 5 whose set value has been varied is input, and the analog signal is converted to a constant cycle (several 100 microns) by the A/D value conversion means 7.
sec) is converted into a digital signal and output.

The storage means 8 stores the digital signal separately into a current value (current volume level) and a previous value (volume level a certain period ago). The comparison means 9 calculates the difference between the current value and the previous value stored in the storage means 8, and from the result of the calculation, the rotation angle determination means 10 determines in which direction and how many times the volume has been rotated. The set value calculating means 11 calculates a set value for how many hours and minutes to increase or decrease from the result obtained from the rotation angle determining means 10. In the display output control section 12, the set value calculation means 1
Display data is created based on the setting values calculated in step 1, and is output to the display section 2, thereby displaying the time corresponding to the rotation angle of the volume.

Next, the operation of the fan heater set value changing device configured as described above will be explained using the flowchart shown in FIG. When power is turned on to the fan heater and the microcomputer is started, setting value changes are started according to the procedure of the control program shown in the flowchart of FIG. 2 stored in the ROM in the microcomputer. First, in step 21, the A/D
The digital value output from the value conversion means 7 is stored in the "current value" of the storage means 8. In step 22, the comparing means 9 compares the "° current value" with the previous current value stored in the storage means 8 in step 35, that is, the "previous value", and sends a signal to the rotation angle determining means 10. And if it is the same, the volume is not rotated, step 35
If there is a difference, the process proceeds to step 23. Step 2
3, the comparing means 9 compares the "current value" and the "previous value" and sends a signal to the rotation angle determining means 10. If the "6 current value" is larger, it is determined that the preset volume has rotated in the positive direction, and the process proceeds to step 24.If the "previous value" is larger, the volume is similarly rotated in the negative direction. It is determined that the rotation angle has changed and the process proceeds to step 29. In step 24 (step 29), the rotation angle determining means 10 calculates how much the "current value" and "previous value" have changed. ”(“Previous value”−
“Current value”) is calculated and stored in “Difference”. Step 25
In step 30, if the "difference" calculated above is equal to 180 degrees of rotation of the volume, that is, the digital value "180 degrees" preset in the rotation angle determining means 10, then the rotation is in the positive direction. Since it cannot be determined whether the rotation is in the negative direction, the process proceeds to step 35 without changing the set value. In step 26 (step 31), if the "difference" calculated above is a rotation amount of "180 degrees" or more, it is determined that the volume has passed the CHANG point shown in FIG. For example, as shown in FIG.
・When changing to "E, F, 0.1.2,...", if you set the time so that you cannot change more than 8 levels within one cycle of input, "180 degrees" = 8, and when the "difference" changes by 8 levels or more, it can be determined that it is only when it changes from F to 01 or from 0 to F, that is, when it passes the CHANG point, and moreover, it changes from F to 0 by 1.
It may be a decrease of 5 levels or an increase of 15 levels from 0 to F (in reality, the level increases from F to 0, or the level decreases from 0 to F, as shown in Figure 8).

Therefore, the calculation is 16-"difference" and the increase and decrease in Φ are reversed. That is, in step 26 (step 31), if the "difference" is a rotation amount of "180 degrees" or more, step 2
7 (step 32), the "difference" is subtracted from the 360 degree rotation of the volume, ie, "360 degrees", and is stored in "rotation angle", and the process advances to step 33 (step 28).

In step 28 (step 33), the set value calculation means 11
Then, a set value for how many hours and minutes to increase or decrease is calculated from the "rotation angle" calculated by the rotation angle determining means 10. In step 34, the display output control section 12 creates display data based on the set values calculated by the set value calculation means 11, and outputs it to the display section 2, thereby displaying the time corresponding to the rotation angle of the volume. Step 35
Then, the ``current value'' is stored in the ``previous value'' in the storage means 8, and the process returns to step 21. Thereafter, the above steps are repeated to perform time setting value change control.

According to the configuration of the above embodiment, when setting the time, the time is repeated every 24 hours, so the setting can be made from either direction, starting from the one that is easier to set.

Note that the above embodiment is shown as an example of the present invention,
Any configuration may be used as long as it achieves the objects and effects of the present invention. For example, instead of the time display, a room temperature display may be provided, or the room temperature may be set using a volume control. By doing this, when setting the room temperature, it is no longer necessary to fit all set values within the operating range of the volume. For example, if you try to set a set value from 12 degrees to 40 degrees with a conventional volume control, the temperature will change several degrees with a small change, but with the configuration of the above example, the operating range is infinite. It is very easy for the user to set up the settings.

In addition to the effects of the invention, as is clear from the description of the embodiments, the present invention makes it possible to endlessly vary the volume, which conventionally had a limited variable range, and without using expensive parts such as encoders. More subtle variable movements are also possible. That is, the present invention can realize an encoder-like operation at the same cost as a volume, and can greatly improve the performance of setting value changes and cost performance.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a control device according to an embodiment of the present invention, FIG. 2 is a flowchart showing an example of a control program for changing set values based on the embodiment, and FIG. 4 is a principle diagram showing the operation when a variable resistor is used in the set value changing section, FIG. 5 is a diagram of the operating characteristics of the volume, and FIG. 6 is a diagram of the A/V of the volume. An operational characteristic diagram of data (digital value) after D conversion and rotation angle, Fig. 7 is a principle diagram showing the operation when an encoder is used in the setting value changing section, and Fig. 8 is an operation in an embodiment of the present invention. It is a characteristic diagram. 4...Setting value changing means, 7...A/D
Value change means, 8... Storage means, 9...
Comparison means, 10...Rotation angle determination means, 11.
...Setting value calculation means. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2 Figure 3 Figure 4/ 42 L3 4th
Figure η Figure 5 ('HANG Figure 6 CHAN f3 Figure 7 Procedural amendment April 1985/f Date 2 Title of invention Case of person who corrects control device 3 using a rotary variable resistor Relationship with Patent Application Colonel Address 1006 Oaza Kadoma, Kadoma City, Osaka Name (582) Representative of Matsushita Electric Industrial Co., Ltd.
Akio Tanii 4 Agent 571 Address 6, Matsushita Electric Industrial Co., Ltd., 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Details of the amendment (1) Replaced with "" in the first line of page 3 of the specification and input it to the control unit 42 ” is corrected to “Replace it with “Input to the control unit 42a.””. (2) Correct "Use encoder 43" in the first line of page 4 to "Use encoder 43b." (3) r child 44 on page 4, line 3. One child 46. The rotation detection element 46 on the receiving side corrects the (4) ``The rotation detection element 44 corrects the position j of the receiving side rotation detection element 45 to ``the position j of the rotation detection element 45 or the reception side rotation detection element 46'' on the 4th line of the same page. (@ Same page 10, line 18 to page 10, line 19) Proceed to step 33 (step 28). In step 28 (step 33), set value operator J is corrected as follows. Proceed to step 33 (step 28).Also, “difference”
If the rotation is less than "180 degrees", proceed to step 36 (step 37), store the "difference" in "rotation angle",
Proceed to step 28 (step 33). Step 28 (
In step 33), correct the setting value operator' (6) Figures 2, 4, and 7 as shown in the attached sheet. Figure 4 Figure 7

Claims (2)

[Claims] (1) A variable rotary type that has a minimum resistance value when the rotation angle is 0 degrees, a maximum resistance value at an arbitrarily determined point within 360 degrees, and whose operating rotation angle is infinite. A set value changing means including a resistor, an A/D value converting means for converting an analog signal from the set value changing means into a digital signal at regular intervals, and a previous value and current value of the A/D converted digital value. a storage means for storing the value; a comparison means for calculating the difference between the previous value stored by the storage means and the current value; A control device using a rotary variable resistor, comprising a rotation angle determination means for determining whether the rotation angle has been rotated, and a set value calculation means for calculating a set value by the rotation angle determination means. (2) A control device using a rotary variable resistor according to claim 1, comprising a display section that displays a display based on the calculation result of the set value calculation means.