JPH05332861A - Radio-controlled sensor switch of fluid-pressure actuating apparatus - Google Patents

Abstract

PURPOSE:To obtain a radio-controlled sensor switch of a fluid-pressure actuating apparatus, which can control a plurality of sensor parts in the concentrated mode with radio communication. CONSTITUTION:This is a sensor switch for detecting the actuating state of a cylinder device and comprises a sensor part 1, which is attached to the cylinder device, and a control part 2, which controls the operating state of the sensor part 1. Signals can be mutually transmitted and received with infrared rays between the sensor par 1 and the control part 2. The operating state of the sensor part 1 is outputted to the outside through the control part 2. In the sensor part 1, a built-in battery 9 is connected to a transceiver circuit 8 comprising a sensor 3, a CPU 4, a memory 5, a input/output circuit 6 and a demodulating/modulating circuit 7. In the control part 2, an outer power supply 18 is connected to a transceiver circuit 17 comprising a CPU 13, a memory 14, an input/output circuit 15 and a demodulating/modulating circuit 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless sensor switch for a fluid pressure actuated device, and more particularly to a fluid pressure sensor which solves the problems of a wired sensor switch and enables centralized control of a plurality of sensor units by a control unit. The present invention relates to a technique effectively applied to a wireless sensor switch of an operating device.

[0002]

2. Description of the Related Art Conventionally, a magnetically sensitive sensor such as a reed switch has been used as a sensor switch of a fluid pressure actuated device, and the contact state of this sensor is output to the outside through a lead wire.

For example, when applied to a cylinder device or the like, a magnet incorporated in a piston displaced in the cylinder device is detected by a magnetically sensitive sensor, and the detected state is externally detected through a lead wire or the like. It is designed to be output to a control device such as a sequencer connected to.

[0004]

However, in the prior art as described above, since the sensor switch and the control device are connected through the lead wire, the lead wire is broken, erroneous wiring, wiring space and routing There is a problem with the lead wire.

Particularly, with the recent increase in the scale of fluid pressure systems, when a plurality of sensor switches are installed, the connection with the control device becomes more problematic.

Therefore, the inventor of the present invention pays attention to remote control of home electric appliances by infrared rays, or wireless communication by radio waves and the like, and in particular, these wireless technologies can be applied to a fluid pressure system for which centralized control is required. I found that.

That is, the object of the present invention is to solve the problems of the conventional wire-type sensor switch, and to control a plurality of sensor units centrally by wireless communication which eliminates the need for connecting lead wires. An object is to provide a wireless sensor switch for an operating device.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0009]

Among the inventions disclosed in the present application, a representative one will be briefly described below.
It is as follows.

That is, the wireless sensor switch of the fluid pressure actuating device of the present invention is a wireless sensor switch for detecting the operating state of the fluid pressure actuating device, and is composed of a CPU, a battery, and a transmitting / receiving circuit using light or electromagnetic waves. And a control unit including a CPU, a transmission / reception circuit for light rays or electromagnetic waves, and an output circuit.

In this case, a plurality of the sensor parts are provided.

[0012]

According to the wireless sensor switch of the fluid pressure actuated device described above, since the sensor unit and the control unit capable of transmitting and receiving by the light beam or the electromagnetic wave are provided, the sensor unit and the control unit communicate with each other, and the sensor The operating state of the unit can be output to the outside through the control unit.

In this case, since the plurality of sensor units are provided, the control unit can centrally control the operating states of the plurality of sensor units.

As a result, problems such as lead wire disconnection, erroneous wiring, wiring space, and routing due to conventional connection via lead wires are eliminated, and intensive operation of fluid pressure actuated equipment, etc., installed in a remote location is eliminated. Various controls can be performed easily.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a wireless sensor switch of a fluid pressure operating apparatus according to an embodiment of the present invention, and FIG. 2 shows a case where the wireless sensor switch of this embodiment is applied to a fluid pressure operating apparatus. It is a block diagram shown.

First, the construction of the wireless sensor switch of the fluid pressure actuating device of this embodiment will be described with reference to FIG.

The wireless sensor switch of this embodiment is, for example, a sensor switch for detecting the operating state of a cylinder device, and has a sensor section 1 attached to the cylinder device,
Control unit 2 for controlling the operating state of this sensor unit 1
The sensor section 1 and the control section 2 can be mutually transmitted and received by a light beam, and the operating state of the sensor section 1 is output to the outside through the control section 2.

The sensor unit 1 has a circuit structure capable of transmitting and receiving by infrared rays, and has a sensor 3 for detection, a CPU (Central Processing Unit) 4 for processing and controlling, a memory 5 for storing sensor information and the like, and a display output. The transmission / reception circuit 8 includes an input / output circuit (I / O) 6 and a demodulation / modulation circuit 7 for converting an optical / electrical signal.
A built-in battery 9 having a high energy density for operating is connected.

For example, a magnetic sensitive sensor such as a reed switch is used as the sensor 3, and the discrimination processing of the sensor 3 is performed through the CPU 4 based on the sensor discrimination information such as the address number stored in the memory 5, and at the same time. The operating state of the sensor 3 is controlled by the LCD (Li
quid Crystal Display) 10 is displayed and output.

The demodulation / modulation circuit 7 converts an electric signal into an optical signal and an optical signal into an electric signal. For example, an infrared photodiode (R) 11 and an infrared LE are provided.
A D (Light Emitting Diode) (S) 12 is connected. Then, in the case of transmission, the electric signal is converted into an optical signal through the infrared LED 12 via the decompression / modulation circuit 7 and transmitted, and conversely, at the time of reception, the optical signal is converted into an electric signal through the infrared photodiode 11. It is converted and received.

The control unit 2 has a circuit structure capable of transmitting and receiving by infrared rays similarly to the sensor unit 1, and has a CPU 1
3, memory 14, input / output circuit for external output (I /
The external power supply 18 for operating the transmitting / receiving circuit 17 is connected to the transmitting / receiving circuit 17 including the O / 15 and the demodulation / modulation circuit 16. An infrared LED (S) 19 for transmission and an infrared photodiode (R) 20 for reception which are opposed to the sensor unit 1 are connected to the demodulation / modulation circuit 16.

Next, the operation of this embodiment will be described with reference to FIG. 2 when it is applied to a system including, for example, a cylinder device.

In this case, a plurality of cylinder devices are installed, and n units of sensor units 1 are attached to these cylinder devices, respectively, and the operating states of the plurality of cylinder devices are detected by these sensor units 1, and one sensor device is detected. Centralized control is provided through the control unit 2.

First, the control section 2 takes out sensor discrimination information from the memory 14 under the control of the CPU 13 and adds an inquiry signal to the sensor section 1 to this sensor discrimination information. Then, the added electric signal is converted into an optical signal through the infrared LED 19 through the decoding / modulation circuit 16 and transmitted to the sensor unit 1.

Further, in the sensor section 1, the CPU 4
Based on the control by, the transmitted optical signal is received through the infrared photodiode 11, and the received optical signal is converted into an electric signal. Then, the received sensor discrimination information is compared with the sensor discrimination information stored in the memory 5.

Only when the comparison results match, that is, when the self-inquiry to the sensor 3 is made, the contact state of the sensor 3 is confirmed through the input / output circuit 6, and when the sensor 3 is in the operating state, for example, "1", reverse. When it is not operating, the response signal is added to the digital signal of "0". Then, the added electrical signal is converted into an optical signal through the infrared / LED 12 through the decoding / modulation circuit 7 in the reverse order of the reception, and the optical signal is responded to the control unit 2.

Then, in the control unit 2, the CP
Under the control of U13, the responded optical signal is received through the infrared photodiode 20, and the received optical signal is converted into an electric signal. Then, the received contact state of the sensor 3 is output as a parallel or serial signal to a control device such as a sequencer connected to the outside through the input / output circuit 15.

In this way, the control unit 2 transmits the sensor discrimination information with the inquiry signal to the sensor unit 1 to all the n sensor units 1 sequentially from the first sensor unit 1. The plurality of sensor units 1 can be controlled by the control unit 2 based on the contact information added to the response signal to the inquiry from the sensor unit 1.

Therefore, according to the wireless sensor switch of the present embodiment, since the sensor section 1 and the control section 2 can transmit and receive each other by infrared rays, it is necessary to connect by a lead wire as in the conventional case. In particular, infrared rays can be transmitted and received between remote locations, and the control unit 2 can centrally control the plurality of sensor units 1.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the embodiments and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, although the sensor switch of the present embodiment has been described as having a circuit configuration capable of transmitting and receiving by infrared rays, the present invention is not limited to the above embodiment, and radio waves using an antenna are used. The present invention is also widely applicable to various transmission / reception using light rays or electromagnetic waves such as communication.

The control unit 2 may be configured such that the external power supply 18 is an AC power supply as shown by a dotted line and the transmission / reception circuit 17 has an AC / DC converter built therein.

Further, it goes without saying that the sensor 3 can be variously changed, for example, by changing to another sensor such as a magnetoresistive element, or in place of the display output by the LCD 10, for example, an output is output by an LED. ..

In the above description, the case where the invention mainly made by the present inventor is applied to a sensor switch used in a cylinder device which is a field of application of the invention has been described, but the invention is not limited to this and a rotary actuator or the like is used. It is also widely applicable to sensor switches of other fluid pressure actuated devices.

[0035]

The effects obtained by the typical ones of the inventions disclosed in the present application will be briefly described as follows.
It is as follows.

That is, the sensor section is provided by including the CPU, the battery and the sensor section composed of the transmission / reception circuit for the light beam or the electromagnetic wave, and the control section composed of the CPU, the transmission / reception circuit for the light beam or the electromagnetic wave and the input / output circuit. Since it is possible to communicate with the control unit and output the operating state of the sensor unit to the outside through the control unit, the operating state of the multiple sensor units can be controlled by the control unit, especially when a plurality of sensor units are provided. You can control it intensively.

As a result, the problems of the conventional wire-type sensor switch can be solved, and a plurality of sensor units can be centrally controlled by wireless communication, and in particular, the control of a fluid pressure operating device installed in a remote place can be performed. A wireless sensor switch that is easily enabled can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a wireless sensor switch of a fluid pressure actuating device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a case where the wireless sensor switch of the present embodiment is applied to a fluid pressure operated device.

[Explanation of symbols]

 1 Sensor Section 2 Control Section 3 Sensor 4 CPU 5 Memory 6 Input / Output Circuit (I / O) 7 Recovery / Modulation Circuit 8 Transmitter / Receiver Circuit 9 Built-in Battery 10 LCD 11 Infrared Photodiode (R) 12 Infrared LED (S) 13 CPU 14 Memory 15 Input / output circuit (I / O) 16 Recovery / modulation circuit 17 Transmitter / receiver circuit 18 External power supply 19 Infrared LED (S) 20 Infrared photodiode (R)

Claims (2)

[Claims] 1. A wireless sensor switch for detecting an operating state of a fluid pressure-operated device, comprising: a sensor unit including a CPU, a battery, and a transmission / reception circuit for light rays or electromagnetic waves; and a CPU, a transmission / reception circuit for light rays or electromagnetic waves, and It has a control unit composed of input and output circuits,
A wireless sensor switch for a fluid pressure actuated device, wherein the sensor unit and the control unit communicate with each other and the operating state of the sensor unit is output to the outside through the control unit. 2. The wireless sensor switch for a fluid pressure actuated device according to claim 1, wherein a plurality of the sensor units are provided, and the control unit centrally controls the operating states of the plurality of the sensor units.