JPS6336243Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an angle detection device, and particularly to a device for detecting the angle of an object used in a vibrating place.

One purpose of this invention is to detect the average angle of a vibrating object.

This invention is implemented, for example, in a remote underwater detection device that transmits underwater information from a fishing net towed by a fishing boat to the boat and displays and observes the underwater situation on the boat.

FIG. 1 shows one embodiment of this invention.

FIG. 2 shows a specific example of the sensor section shown in FIG.

FIG. 3 shows another specific example of the sensor section.

In FIG. 2, the holding box 1 has a bottom surface bent into an arc shape, and three pairs of holes, for example, formed in both sides of the holding box 1, and is fixed to a vibrating and tilting object to be measured. The photointerrupters 2, 3, and 4 are composed of light emitting diodes and phototransistors.
The light emitting diode is fixed to the side plate of the holding box so that the light emitted passes through the hole bored in the side plate of the holding box. The reflecting plate 5 is provided close to the holding box 1 and parallel to the side plate of the holding box, and reflects the light emitted by the light emitting diode and transmitted through the holding box, and causes the phototransistor to receive the light. The ball 6 is dimensioned so as to always block the light from one of the light emitting diodes, and as the object to be measured, that is, the holding box 1, is tilted, the ball 6 moves within the box and blocks the light emitted by the light emitting diode. Block out light. The photointerrupters 2, 3, and 4 send out drive signals when the ball 6 does not block the light emitted by the light emitting diode.

In FIG. 1, a signal generator 8 sends out a voltage signal corresponding to the tilt angle. One end of the resistor 11 is connected to the DC power supply, and the other end is connected to the analog switch 12.
and one end of the resistor 13. The other end of the resistor 13 is connected to an input end of an analog switch 14 and one end of a resistor 15. The other end of resistor 15 is connected to the input end of analog switch 16 and one end of resistor 17. One end of each of the resistors 18, 19, and 20 is connected to a DC power source. The other end of the resistor 18 is connected to the control terminal of the analog switch 12 and the collector of a phototransistor 21 constituting the photointerrupter 2. The other end of the resistor 19 is a control terminal of the analog switch 14 and a phototransistor 2 constituting the photointerrupter 3.
2 collector. The other end of the resistor 20 is
It is connected to the control terminal of the analog switch 16 and the collector of the phototransistor 23. The emitters of phototransistors 21, 22, and 23 are commonly grounded. Analog switch 12, 14, 16
Each output terminal is connected to a resistor 24, 25, 26, respectively.
connected to one end of the The other ends of the resistors 24, 25, and 26 are commonly connected to an input terminal of an amplitude-time conversion circuit 27 and one end of a capacitor 28. The other end of capacitor 28 is grounded. The phototransistor 21 makes the analog switch 12 conductive when no drive signal is supplied from the photointerrupter 2. At the same time, phototransistors 22 and 23
is analog switch 1 while no drive signal is supplied from photo interrupters 3 and 4, respectively.
4 and 16 are made conductive.

For example, as shown in FIG. 2A, when the ball 6 blocks the light emitted by the photo interrupter 2, the analog switch 12 is closed and the analog switches 14 and 16 are open, so that the capacitor 28 is A charging current flows through the analog switch 12. Amplitude-time conversion circuit 2
7 sends out a pulse width signal corresponding to the input voltage value. The conversion circuit 27 counts the clock pulses supplied from the clock pulse generator 29 from the time when the reset signal is input to the reset terminal and is reset, generates a voltage signal proportional to this counted value, and converts the generated voltage signal and the input voltage signal. The voltage value is compared with the voltage value, and a rectangular wave that lasts from the reset time until the time when both voltage values match is sent to the count value 30. The conversion circuit 27 is reset at a predetermined period. While the rectangular wave is being supplied from the conversion circuit 27, a counting operation is performed based on the clock pulses supplied from the clock pulse generator 29 and the counted value is sent to the display 31. Display device 31
, for example, displays three kinds of lamps: "too upward,""proper," and "too downward." This is done based on the relationship between the predetermined count value of the counter 30 and the display type of the display 31. . The voltages at the input terminals of analog switches 12, 14, and 16 are assumed to be V ₁ , V ₂ , and V ₃ , respectively.

As shown in FIG. 2A, when the ball 6 blocks the light emitted by the photo interrupter 2, the analog switch 12 is closed and the analog switches 14 and 16 are open, so that the voltage V ₁ and the resistor 24 are
The capacitor 28 is charged with a current defined by ” is displayed. When the ball 6 blocks the light emitted by the photo interrupter 3, the analog switch 14
is closed and the analog switches 12 and 16 are opened, so that the capacitor 28 is charged with the voltage V ₂ and the current determined by the resistor 25, and the display 31 displays a lamp indicating "proper". Similarly, when the ball 6 blocks the light emitted by the photo interrupter 4, the display 31 displays "Too downward".

When the object to be measured vibrates and, for example, the ball 6 almost alternately blocks or transmits light to the photointerrupters 2 and 3, the capacitor 28 is charged via the analog switch 12 and the resistor 24.
Capacitor 28 is discharged via resistors 25, 15 and 17. Therefore, the potential of the capacitor 28 is the average potential between the voltages V ₁ and V ₂ . In this case, the display 31 may display "appropriate" or "too upward" based on the relationship between the predetermined potential and the display type. ball 6
However, when the photointerrupters 3 and 4 are alternately shielded from light, the capacitor 28 is charged and discharged through the analog switches 14 and 16. The potential of the capacitor 28 depends on the vibration mode and the potentials V ₂ and V ₃
and resistors 25, 26 and 17. That is, the tilt angle of the vibrating object can be displayed according to the temporal rate of the tilt. In this case,
The display 31 displays a message such as "Too downward" based on the relationship between the predetermined potential and the display type. Then, display is performed based on the average potential of the capacitor 28 at each specific time.

In FIG. 3, a bent transparent tube 40
An opaque liquid 41 and air 42 are sealed inside.
Fixed and held on the object to be measured. Transparent tube 40
When the is tilted, the air 42 moves accordingly. For example, three photo interrupters are provided on one side of the transparent tube 40 in parallel with the transparent tube 40, and a reflector is provided on the other side (not shown). In this case, any one of the analog switches 12, 14, and 16 may be operated when the reflector reflects the light emitted by the photo interrupter.

FIG. 4 shows another specific example of the sensor section.

The arm 43 is designed to freely reciprocate around a shaft 44 according to the inclination of the object to be measured, and has a reflective tape 45 attached to its tip. A plurality of photo interrupters 2 are provided close to the movement trajectory of the arm 43.

In the above embodiment, the case where three photo interrupters are provided is described, but the present invention is not limited to this, and the number may be two or four or more. By increasing the number of photo interrupters, more precise angle display becomes possible.

In addition, as another method for extracting the average potential, in addition to the above-mentioned embodiment shown in FIG. It is also possible to additionally provide a sample and hold circuit to input the output signal of this sample and hold circuit to the amplitude-time conversion circuit 27. In this case, the circuit 27 may be configured to be reset after the input signal is supplied to the amplitude-time conversion circuit 27.

As described above, according to this invention, it is possible to provide an angle detection device that can display the angle of an object used particularly in a vibrating place as the average inclination within a predetermined period of time.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of this invention. FIG. 2 shows a specific example of the sensor section shown in FIG. 1. FIG. 3 shows another specific example of the sensor section. Figure 4 shows
This is another specific example of the sensor section. 1 is a holding box, 2, 3, 4 are photo interrupters, 5 is a reflector, 6 is a ball, 40 is a transparent tube, 41 is an opaque liquid, 42 is air, 43 is an arm, 44 is a shaft, 45 is a reflective tape It is.

Claims (1)

[Claims for Utility Model Registration] A light-emitting element that emits light, a reflector that reflects the light emitted by the light-emitting element when the inclination angle of an object reaches a predetermined angle, and a receiver that receives the light reflected by the reflector. A voltage device consisting of multiple light receiving elements that generate output signals when the voltage is applied, a capacitor whose one end is grounded and the other end connected to the output terminal, and a resistor that is connected between a predetermined voltage power source and the ground and generates multiple potentials. a divider, one end of which is connected to the output terminal of the capacitor, and the other end of which is connected to a portion of the voltage divider that generates a corresponding potential, and serves as a time contact to which the output signal of the corresponding light-receiving element is supplied. a plurality of switches, a plurality of resistors inserted and connected between the respective predetermined potential generating parts of the voltage divider and the output terminal of the capacitor, and displaying the inclination of the object based on the output voltage signal of the capacitor. An angle detection device consisting of a display device.