JPS6020686B2 - position detection device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a position detection device.

A conventional position detection device generally has a circuit as shown in FIG.

In FIG. 1, for example, the position of a controlled object controlled by an operating device is detected by a position detection potentiometer 1, and the position is detected by, for example, shaking a meter using a detection voltage taken out via a detection conversion regulator 2. will be carried out. Note that the detection conversion adjuster 2 is composed of a position detection amplifier 2a and input resistors 2b and 2c. Also V
R2 is a zero adjustment variable resistor, VR is a span adjustment variable resistor, and E, , E2 are power supplies. In the position detection device of FIG. 1 configured in this way, if a part of the potentiometer 1 (between A and B) is used, the detection voltage of OV at point A and 1 skin at point B is detected by the position detection amplifier 2a. The zero adjustment variable resistor VR2 and the span adjustment variable resistor VR are adjusted so as to obtain the output of the detection conversion regulator 2.

This work must be done every time the scope of use changes, and the work is not simple. The object of the present invention is to eliminate such conventional drawbacks and provide a position detection device that can extract a voltage proportional to a required stroke with a single touch. Therefore, the present invention provides a position detection device that uses a variable resistor to detect the position, applies a voltage EO to both ends of the variable resistor, and detects the position by reading the voltage value of the sliding terminal. An automatic device that can automatically change the voltage applied to the resistor is added, and the voltage obtained from the old erect chair is set to a predetermined value using the automatic device before operation. The present invention aims to provide a position detection device characterized in that the voltage obtained from the dynamic terminal operates within a predetermined value range, and will be described below using examples. FIG. 2 shows an embodiment of the position detection device according to the present invention, in which 5 is a position detection section of a controlled object controlled by an operating device, and 5a
is a potentiometer, and this potentiometer 5
The sliding terminal a is connected to the output terminal 7 via the detection conversion regulator 6 and the operating contact Y.

Here, the detection conversion adjuster 6 is composed of an amplifier 6a with a fixed gain (for example, gain G=-IV/V), a resistor 6b, and a resistor 6c. Further, the output end of the detection conversion adjuster 6 is connected to the input end of an analog-to-digital converter 8 via an adjustment contact X.
The output terminal of is connected to each input terminal of the arithmetic circuit 9 via a contact X^ and a contact XB, respectively.

When the arithmetic circuit 9 receives the adjustment command, it first calculates the reference voltage Ec.
and OV are analog-to-digital converted and the digital values of Ec and OV are stored respectively, and the memory circuit 8QI stores the digital value of Ec, and the memory circuit 1 stores the digital value of OV.

Further, the arithmetic circuit 9 performs a predetermined arithmetic operation to be described later, and the result of the arithmetic operation is cleared and stored in the corresponding memory circuits 18 and 11 connected to the output terminal of the arithmetic circuit 9, respectively. The output end of the memory circuit wing is a digital analog. Potentiometer 5a via Coupler converter 12
connected to one end of the The output end of the memory circuit 11 is connected to the other end of the potentiometer 5a via a digital-to-analog converter 3. The operation of the apparatus thus constructed in FIG. 2 will be described below. Now, the reference voltage Ec and OV are supplied to the arithmetic circuit 9 according to the adjustment command, and the analog-to-digital conversion is performed here to obtain Ec and O.
Store the digital value of V.

Further, the digital value of Ec is stored in the memory circuit OG, and the digital value of OV is stored in the memory circuit 11'. The output of the memory circuit 10 is converted from digital to analog by a digital to analog converter 12 and applied as a constant voltage Ec to the upper end of the potentiometer 5a. In addition, the output of the memory circuit 1 is converted to a digital to analog converter 13.
Digital to analog is converted with potentiometer 5a
is applied as OV to the lower end of . Further, when the adjustment command is also supplied to the arithmetic circuit 9, the adjustment contact X is closed.

Now, assuming that both ends of the stroke required by the potentiometer 5a are A and B as shown in the figure, the slider of the potentiometer 5a is set at 8 points, and by opening the contact XB, the voltage EB at the B point is detected and converted. The digital value of E8 is read into the arithmetic circuit 9 via the regulator 6, the adjustment contact X, the analog/digital converter 8, and the contact X8. Next, by setting the slider of the potentiometer 5a to point A and closing contact XA, the voltage E at point A is
A is detected through the conversion regulator 6, the adjustment contact X, the analog-to-digital converter 8 and the contact
Read the digital value of EA into. The arithmetic circuit 9 is
1} and [2} are calculated.

E2 = 1 Kagoshima Sanpoutei Z...'11E. =-third class B sail {21 Then, the calculation result of the above equation {1' is stored in the memory circuit 10.

Further, the calculation result of the above equation 2' is stored in the memory circuit 1.

In this case, when storing the digital value of E2, E, which is the calculation result of the memory circuit 10, 1, [1}0 formula,
, E, are stored. Even though the output E2 of the memory circuit IQ is converted from digital to analog by the digital to analog converter 12, a voltage E2 is applied to the upper end of the potentiometer 5a. Also, the output E of the memory circuit 11
, are converted from digital to analog by the digital to analog converter turtle 3, and the voltage E is applied to the lower end of the potentiometer 5a.
, is applied. 0 Therefore, when the operating contact Y is closed in response to an operating command, the detected voltage at an arbitrary position It is taken out from the output terminal 7.

The five outputs taken out from the output terminal 7 are used to detect the position by, for example, shaking the makeup.
FIG. 3 is a diagram for explaining a voltage calculation method related to the arithmetic processing of the present invention, and this FIG. 3 will be explained.

0 In Figure 3, 1○ 1 addition B. …--
{3} y = re-release X- here 5 A: Blood% stroke E...0-26EA B = 100% stroke. If L x is 100% stroke in the function EB EC , the voltage of E2 shown in the above equation {1} can be found.

Furthermore, if x=0 in the above 0 system, E shown in the above equation (2) can be found. Also, in formula {3}, when x;A,
y=10V, and when x=B, y=OV. In addition, in the function of y=skin% stroke X---{4}, when x=A, y=EA(V), and when x=B, y=E8(V). As mentioned above, if the position detection device according to the present invention is used, it is possible to extract a voltage proportional to the required stroke with a single touch in the position detection device using a potentiometer (variable resistor), so it is easier to adjust than the conventional method. This has the effect of significantly shortening the working time and allowing adjustments that require skill to be completed.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing an example of a conventional position detection device;
The figure is a block diagram showing one embodiment of the position detection device according to the present invention, and FIG. 3 is a diagram for explaining a voltage calculation method related to the arithmetic processing of the present invention.・5a is a potentiometer, 6 is a detection conversion adjuster, 7 is an output terminal, 8 is an analog-digital converter, 9 is an arithmetic circuit,
10 and 11 are memory circuits, 12 and 13 are digital-to-analog converters, x is an adjustment contact, Y is a driving contact,
XB and X8 indicate contact points. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a position detection device that uses a variable resistor to detect the position, applies a voltage to both ends of the variable resistor, and detects the position by reading the voltage value of the sliding terminal, the voltage applied to the variable resistor An automatic device that can automatically change the voltage is added, and before operation, the automatic device sets the voltage obtained from the sliding terminal to a predetermined value, and the voltage obtained from the sliding terminal during operation is set to a predetermined value. A position detection device characterized in that it operates within a predetermined value range.