JPH0191598A - Remote switch device - Google Patents

Abstract

PURPOSE:To inexpensively manufacture a remote switch confirming the operating state of a control section at the operation section side by sending a control signal from the operation section to a control section and sending a control state signal from the control section to the operation section conversely through one optical fiber. CONSTITUTION:When a mechanism 8 knocking a piezoelectric conversion element 9 of an operation section 1 is operated, a mechanical shock is given to a piezoelectric conversion element 9 to generate a voltage and the light emitting element 10 at the operation side is lighted by the voltage. Then the light is sent to the control section 2 through the optical fiber 3 and the controls section 2 replies the optical signal in a 1st timing to turn on or off, e.g., a load and the light emitting element 12 of the control section 2 is lighted in a 2nd timing. The light of the lighted light emitting element 12 is sent to the operation side 1 through the optical fiber 3 in opposite direction and the light is desplayed visually on the display section 6 provided to the operation section. The operation section 1, depending on the display state of the display section 6, can recognize the control state of the control section 2 such as load on/off state depending on the display state of the display section 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a remote switch device using a piezoelectric transducer in an operating section.

(B) Prior Art The applicant of the present invention has developed a piezoelectric transducer and a mechanical impact applying means for applying a mechanical shock to the piezoelectric transducer as a switch that does not require a power source and has excellent explosion-proof properties. , has created a piezoelectric/optical switch consisting of a light emitting element that is turned on by the voltage generated by the piezoelectric conversion element, and has already filed a separate application.

This piezoelectric/optical switch is used as an operation unit, and the light from the light emitting element is sent via an optical fiber to a control unit at a distant point.In the control unit, the light transmitted through the optical fiber is received by a light receiving element. A remote switch device can be configured to turn on/off loads such as vacuum cleaners and ventilation fans. However, if the optical signal is simply transmitted from the operating section to the control section using an optical fiber, the operating side cannot know the load condition. The light emitting element is equipped with a light emitting element that lights up according to the control state, and the output light of the light emitting element is transmitted to the operating section through a second optical fiber, and the light transmitted through the second optical fiber is transmitted to the operating section. A separate application has been filed for a remote switch device equipped with a display section that provides visual display.

(c) Problems to be solved by the invention The remote switch device of the above-mentioned prior application has
Requires two optical fibers. Therefore, a large number of optical fibers are required for transmission, which increases the cost and also doubles the weight, which is disadvantageous. Furthermore, when two optical fibers are provided, there remains the problem that it is difficult to distinguish between the outgoing path and the incoming path in practice, and wiring is extremely difficult.

The present invention has focused on the above-mentioned problems, and aims to provide a remote switch device that allows the operator to check the control status of the control unit and uses only one optical fiber.

(d) Means for Solving the Problems The remote switch device of the present invention includes a piezoelectric transducer, a mechanism for striking the piezoelectric transducer, and an operation section that includes a light emitting element that emits light based on the voltage generated by the piezoelectric transducer. an optical fiber that transmits the output light of the light emitting element; and a controller that responds to the optical signal transmitted by this optical fiber.
In the control section, the control section includes a light emitting element that lights up according to a control state, a first timing signal generating means that intermittently outputs a pulse signal at a predetermined first timing, and a first timing signal generating means that outputs a pulse signal intermittently at a predetermined first timing. second timing signal means for outputting a second timing signal different from the timing of the second timing signal; means for responding to the optical signal from the optical fiber at the first timing; and means for responding to the optical signal from the optical fiber at the first timing; and means for transmitting the light through the optical fiber, and the operating section includes a display section that visually displays the light transmitted through the second optical fiber.

(E) Function In this remote switch device, when the mechanism that strikes the piezoelectric transducer in the operating section is operated, a mechanical shock is applied to the piezoelectric transducer, and the piezoelectric transducer generates a voltage. The light emitting element on the operating side lights up. The light is then transmitted to the control section through the optical fiber, and the control section responds to the optical signal at the first timing to turn on or off the load, for example. Further, when the load is turned on, the control section lights up the light emitting element of the control section at a second timing. The light from the lit light emitting element is transmitted backward through the optical fiber to the operating side, and is visually displayed on a display section provided on the operating section. On the operating unit side, the control status of the control unit, for example, the on/off status of the load, can be known from the display status of the display unit.

(f) Examples The present invention will now be explained in more detail with reference to Examples.

FIG. 1 is a schematic configuration diagram of a remote switch device showing an embodiment of the present invention. This remote switch device includes an operating section 1, a control section 2, and one optical fiber 3.

The operation unit 1 includes a piezoelectric/optical switch 4, a half mirror 5, and a display window 6 with a diffusion screen 7. The piezoelectric/optical switch 4 includes a hammer 8 driven by an actuator, a piezoelectric transducer 9 that generates an electromotive force when struck by the hammer 8, and a light emitting device that is lit by the voltage output from the piezoelectric transducer 9. Element (LED) 1
Consists of 0. A half mirror 5 is arranged between the light emitting element 10 and the tip surface 3a of the optical fiber 3, and the light emitted from the light emitting element 10 is transmitted through the half mirror 5 and output to the optical fiber. Light traveling backward from the control section 2 side is reflected by a half mirror 5 and output to a display window 6 via a diffusion screen 7.

The control unit 2 connects the tip surface 3b of the optical fiber 3, the light receiving element (phototransistor) 11, and the light emitting element (LED) 12 between the
A half mirror 13 is provided, and the light from the optical fiber 3 passes through the half mirror 13 and enters the light receiving element 11, while the light exiting the light emitting element 12 passes through the half mirror 13.
It is configured so that it is reflected by the optical fiber 3 and travels backward within the optical fiber 3.

The control unit 2 further includes a timing pulse generator 14 that outputs an intermittent first timing signal, as shown in FIG. 2C.
The output of this timing pulse generator is inverted by an inverter 15, and a second timing signal that is time-divided from the first timing signal is generated. The output of the timing pulse generator 14 and the output of the light receiving element 11 are respectively given to the input terminal of an AND circuit 16.
At the output of 6, flip-flop 17 is set. Flip-flop 17 outputs a control signal f for turning on a load (not shown). Further, the output of the impark 15 and the output of the flip-flop 17 are connected to the AND circuit 18.
The output of the AND circuit 18 lights up the light emitting element 12.

In the remote switch device of the above embodiment, when the actuator of the hammer 8 of the operation unit 1 is operated, the piezoelectric conversion element 9 is struck by the hammer 8, and the voltage shown in FIG. and light emitting element 1
0 means light is emitted.

This light passes through the half mirror 5 and is transmitted to the control unit 2 via the optical fiber 3. In the control unit 2, the light receiving element 11 receives the optical signal and generates a voltage (
(See Figure 2).

On the other hand, the timing pulse generator 14 outputs the signal shown in FIG. Since the signal C is "0", the AND circuit 6 does not derive the signal C as the signal d. However, when the light receiving element 11 receives an input as described above, the input of the AND circuit 16 becomes a logic "1". Therefore, the signal C is input to the flip-flop 17 as the signal d (see d in Figure 2).If the actuator operation is a signal indicating that the load is ON, this signal d causes the flip-flop to 1
7 is set [see Figure 2 f l) α].

However, if the actuator operation indicates that the load is off, the flip-flop 17 was previously set and is therefore manually reset by the signal d.

When the flip-flop 17 is set, the signal f becomes high, and the load is turned on, a logic "l'" signal is input to one end of the input of the AND gate 18, so the output of the impark 15 becomes the AND gate. The signal e (see FIG. 2 e) is derived on the output side of the day. With this signal e,
The light emitting element 12 lights up, and the light is reflected by the half mirror 13 and travels backward through the optical fiber 3 towards the operating section 1 side.
The light is reflected by the half mirror 5 of the operation unit 1, enters the display 6, and the display 6 emits light. Therefore, in the operation section 1, the operating state of the control section 2 can be confirmed by visually observing the light emitted from the display 6.

As described above, in the remote switch of this embodiment, the control unit 2 time-divides the optical reception from the operating unit 1 and the optical transmission that transmits the operating state to the operating unit, that is, the timing is controlled. Since they are shifted, it is possible to transmit operation signals and control status signals using a single optical fiber.

In the above embodiment, a half mirror is used to switch between the transmitted light and the received light, but a branched optical waveguide or the like may be used instead.

(G) Effects of the Invention According to this invention, the transmission of operation signals from the operation section to the control section and conversely the transmission of control status signals from the control section to the operation section are carried out by time-sharing, using wooden optical fibers. Therefore, it is possible to manufacture a remote switch that allows checking the operating status of the control section on the operating section side at a low cost, and it is also lightweight and compact, and wiring etc. is also easy. There are various advantages such as:

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a remote switch device showing an embodiment of the present invention, and FIG. 2 is a waveform diagram of each part for explaining the operation of the remote switch device. 1: Operation unit, 2: Control unit, 3: Optical fiber, 6: Display unit, 8: Hammer, 9:
Piezoelectric conversion element, 10/12: Light emitting element, 11: Light receiving element, 14: Timing pulse generator, 15: Inverter, 16/18: AND circuit, 17
:flip flop. Patent Applicant Yasu Electric Co., Ltd. Agent Patent Attorney Shigeru Nakamura Figure 2 1 b/ 1

Claims (1)

[Claims] (1) A piezoelectric transducer, a mechanism for striking the piezoelectric transducer, an operation unit including a light emitting element that emits light based on the voltage generated by the piezoelectric transducer, an optical fiber that transmits the output light of the light emitting element, and the optical fiber. a control unit that responds to an optical signal transmitted by a remote switch device, the control unit including a light emitting element that lights up according to a control state;
a first timing signal generating means for intermittently outputting a pulse signal at a predetermined first timing; and a second timing signal generating means for outputting a pulse signal at a second timing different from the first timing. , means for responding to an optical signal from the optical fiber with the first tanning;
means for transmitting the light from the light emitting element through the optical fiber at a second timing, and the operation section includes a display section that visually displays the light transmitted through the second optical fiber. remote switch device.