JPH11211506A - Optical detection system detecting displacement of sliding frame along slender plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make displacement accurately measurable by a constitution sliding a sliding frame having sliding holes along a slender plate having a plurality of positioning holes to convert a signal detecting a positioning hole with an optical sensor into a position signal. SOLUTION: The optical detection system comprises a case 12, a slender plate 14, a sliding frame 16, an optical sensor 18, a position detector 19, and a control circuit 20. The slender plate 14 comprising a plurality of positioning holes 26 and a conductor is placed under the opening 24 of the chamber 22 of the case 12. The sliding frame 16 comprises a frame body 30 having a sliding hole 32 enabling the sliding frame 16 to slide to the slender plate 14, and a button 34 to move the sliding frame 16. The optical sensor 18 comprises a light-emitting device 36 and a photoreceiver 38, where the photoreceiver 38 receives light from the light-emitting device 36 passing through the positioning holes 26 to generate a detector signal. The position detector 19 is placed at a predetermined position on the slender plate 14. The control circuit 20 stores a position, where the sliding frame 16 is detected at by the position detector 19, as a reference position to calculate displacement of the sliding frame 16 by a detection signal from the optical sensor 18 and output a position signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a light detection system, and more particularly, to a light detection system for detecting displacement of a sliding frame along an elongated plate.

[0002]

2. Description of the Related Art Linear variable resistors are widely used as input devices in electronic systems. Sliding buttons are usually provided to engage a fixed resistance to change its resistance. The contact portion of such a variable resistor is easily damaged after frequent use, making the measurement of the resistance value of the variable resistor inaccurate.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a light detection system for measuring the displacement of a sliding frame along an elongated plate replacing a conventional linear variable resistor in order to solve the above-mentioned problem. .

[0004]

SUMMARY OF THE INVENTION The object is to provide a housing having a chamber therein; an elongated plate provided with a plurality of positioning holes and parallel conductors and provided horizontally in the room; A sliding frame having a sliding hole in the center that engages with the frame; provided in the frame to detect the positioning hole of the elongated plate and generate a corresponding detection signal, and slidable on a parallel conductor of the elongated plate. A light detection system comprising: a connected optical sensor; and a control circuit provided in the housing for converting a detection signal generated by the sensor into a corresponding position signal or displacement signal, and connected to a parallel conductor of an elongated plate. Achieved.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 3, FIG. 1 is a perspective view of a light detection system 10 according to the present invention. FIG.
FIG. 2 is a sectional view taken along line 2-2 of the light detection system 10 shown in FIG. FIG. 3 shows the light detection system 1 shown in FIG.
FIG. 2 is a schematic view of the various components of FIG. System 10 is housing 1
2. It comprises an elongated plate 14, a sliding frame 16, an optical sensor 18, a position detector 19, and a control circuit 20. The housing 12 has a chamber 22 provided therein and having an elongated opening 24 thereon. The elongated plate 14 is provided horizontally in the chamber 22 and is located below the elongated opening 24. The plate 14 includes a plurality of positioning holes 26 arranged along the longitudinal direction of the elongated plate 14 and a plurality of parallel conductors 28 provided on the surface of the elongated plate 14. The sliding frame 16 includes a frame body 30 having a sliding hole 32 in the center of the frame body 30 and a button 34 on the frame body 30. The sliding hole 32 is provided so that the sliding frame 16 can slide with respect to the plate 14. The button 34 projects from the elongated opening 24 and can be used to move the sliding frame 16 along the plate 14.

[0006] The optical sensor 18 detects the positioning holes 26 of the plate 14 and generates a corresponding detection signal.
It is provided inside the frame 30 so that the displacement of the upper sliding frame 16 can be calculated by the detection signal. The function of the optical sensor 18 is similar to the optical sensor used in a conventional positioning device such as a mouse. The optical sensor 18 is provided on one side of the plate 14 to receive light emitted from the light emitting element 36 and passing through the positioning hole 26 and generate a corresponding detection signal. And a light receiver 38. The optical sensor 18 is electrically connected to the parallel conductor 28 so as to be slidable. The control circuit 20 provided on the housing 12 is also connected to the parallel conductors 28 of the plate 14, thereby supplying power to the sensor 18 and converting the detection signal generated by the sensor 18 into a corresponding displacement signal.

The control circuit 20 comprises a memory 42 for storing programs and data, and a processor 46 for executing a position detection program 44 stored in the memory 42. The position detection program 44 is used to convert the detection signal generated by the sensor 18 into a corresponding displacement signal and transfer the displacement signal to the output port 21. The control circuit 20 can not only convert the detection signal into a displacement signal but also convert the detection signal into a position signal to indicate the position of the sliding frame 16 on the plate 14. The position detector 19 is provided at a predetermined reference position for detecting the sliding frame 16 on the plate 14. When using the light detection system 10, the user must first move the slide frame 16 to the position detector 18 to establish the position of the slide frame 16. The control circuit 20 stores the sliding frame 16 in the memory 42 as a reference position when the sliding frame 16 is detected by the position detector 19. Next, the position detection program 44
Is the sliding frame 1 based on the detection signal generated by the sensor 18.
6 is calculated, and the sliding frame 16 stored in the memory 42 is calculated.
Is updated, and a position signal is output to the output port 21 based on the position stored in the memory 42. Whenever the sliding frame 16 is detected by the position detector 19, the control circuit 2
"0" immediately resets the position of the sliding frame 16 to the reference position.

[0008] In addition to the above method of using the position detector 19 to establish the position of the sliding frame 16, there are other methods of setting the position of the sliding frame 16. This method is very similar to the calibration method used in prior art joysticks. By moving the sliding frame 16 across the plate 14, the control circuit 20 establishes a position within the range of maximum movement with respect to the sliding frame 16 and stores the position in the memory 42. Next, the position detection program 44 updates the position of the sliding frame 16 based on the detection signal generated by the sensor 18 and generates a position signal based on the position stored in the memory 42.

FIG. 4 is a circuit diagram of the optical sensor 18. The light sensor 18 includes the light emitting element 36 and the light receiver 3.
Consists of eight. The light emitting element 36 and the light receiver 38 are the elongated plate 1
4 are connected to the control circuit 20 through parallel conductors 28 provided over the surface of the control circuit 20. The light emitting element 36 is a light emitting diode, and the light receiver 38 includes two light detectors 40 arranged along the longitudinal direction of the elongated plate 14 so as to detect the light passing through the positioning holes 26 over the elongated plate 14. The control circuit 20 shown in FIG. 3 uses the detection signal generated by the sensor 18 to calculate the displacement of the slide frame 16 and generates a corresponding displacement signal or position signal.

Compared to a conventional linear variable resistor, the frequent use of the sliding frame 16 does not cause any damage to the optical sensor 18 or the positioning hole 26. As long as the optical sensor 18 operates properly, the control circuit 20 always accurately detects the displacement of the slide frame 16 and generates a corresponding displacement or position signal.

[Brief description of the drawings]

FIG. 1 shows a perspective view of a light detection system according to the present invention.

FIG. 2 is a cross-sectional view of the light detection system shown in FIG. 1 along 2-2.

FIG. 3 is a schematic diagram of various components of the light detection system shown in FIG.

FIG. 4 is a circuit diagram of the light detection sensor shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Light detection system 12 Case 14 Slender plate 16 Sliding frame 18 Optical sensor 19 Position detector 20 Control circuit 22 Room 24 Opening 26 Positioning hole 28 Conductor 30 Frame main body 32 Sliding hole 34 Button 36 Light emitting element 38 Light receiver 40 Light Detector 42 Memory 44 Position detection program 46 Processor

Claims (8)

[Claims] A housing having a chamber therein; an elongated plate provided with a plurality of positioning holes and parallel conductors and provided horizontally in the chamber; and a center slideable slidably engaged with the elongated plate. A sliding frame having a moving hole; detecting a positioning hole of an elongated plate,
An optical sensor mounted on said frame to generate a corresponding detection signal and slidably connected to parallel conductors of the elongated plate;
A light detection system comprising: a control circuit provided in a housing to convert a detection signal generated by a sensor into a corresponding position signal or displacement signal, and connected to parallel conductors of an elongated plate. 2. The light detection system according to claim 1, wherein the positioning holes of the elongated plate are linearly provided on the elongated plate along the sliding direction of the sliding frame. 3. The light sensor is arranged on one side of the elongated plate and the other side of the elongated plate receiving light emitted from the light emitting element through the positioning hole and generating a corresponding detection signal. The light detection system according to claim 1, comprising a light receiver. 4. A photodetector detects light passing through the positioning hole and generates two detection signals corresponding to the displacement of the sliding frame along the frame. 4. The light detection system according to claim 3, comprising a light detector, wherein the control circuit calculates a displacement of the sliding frame according to the detection signal and converts the displacement into a corresponding displacement signal. 5. A control circuit comprising: a memory for storing a program and data; a position detection program stored in the memory; and a processor for executing the position detection program, wherein the position detection program is provided along a sliding frame along an elongated plate. The position detection program detects the maximum range of movement of the sliding frame along the elongated plate by a calibration procedure performed by the user to detect the position of the sliding frame according to the detected position and the detection signal. The light sensing system according to claim 1, wherein a position signal is generated to indicate a position along the plate. 6. A sliding frame along an elongated plate according to a position detector and an output of a detection signal, further comprising a position detector provided in the housing for detecting the sliding frame at a predetermined position. The light detection system according to claim 1, wherein the light detection system generates a position signal indicating a position of the light detecting device. 7. The control circuit comprises: a memory for storing a program and data; a position detection program stored in the memory; and a processor for executing the position detection program, wherein the sliding frame is detected by the position detector. When the position detection program stores the position of the sliding frame in the memory, and when the sliding frame slides along the elongated plate, the position detection program updates the position stored in the memory with the detection signal and stores the position in the memory. 7. The light sensing system according to claim 6, wherein the system generates a position signal according to the stored position. 8. The housing further has an elongated opening thereon,
The light sensing system according to claim 1, wherein the sliding frame further has a button protruding from the elongated opening thereon, whereby the sliding frame is slidable along the elongated plate by using the button.