JPS632212A - Switch with transmitting function at opening and closing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a switch with an opening/closing transmission function that inputs the occurrence of the opening/closing operation to a monitoring recording unit located a short distance away by electromagnetic waves each time a switch is opened/closed. Regarding switches.

[Conventional technology]

Traditionally, for example, during maintenance work on certain types of electronic equipment (systems), switches installed at specific locations have been used for partial inspection or as reference materials. Monitor things like when and how many times you went there, or what condition it was in at that time.
There were times when it was necessary to record the switch.In such cases, it is technically difficult to attach a recording needle to each switch, or to input the opening/closing operation by wiring to a department that centrally monitors and records it. Of course, it is easy.

However, if a recorder is attached to each switch, it is impossible to centrally monitor the opening/closing status of each switch.
In addition, collecting such records is time-consuming and impractical. In addition, it is easy to wire the opening/closing operation input to the switch in advance and then centrally monitor and record at the recording department. However, when changing the layout or type of machinery or equipment, it is not easy to simultaneously change the wiring for centrally monitoring and recording the opening/closing operations of these types of switches. do not have.

[Problem that the invention seeks to solve]

The present invention enables the opening and/or closing operation of a specific switch to avoid inconveniences that occur in the case where it is necessary to centrally monitor and record the opening and/or closing operation of a switch. An object of the present invention is to provide a switch with a transmission function when opening and closing, which is suitable for intensively monitoring and recording.

[Means for solving problems]

In order to solve the above-mentioned problems, in the present invention, a piezoelectric element is installed in a switch that uses an elastic body to reliably operate an opening/closing mechanism so as to receive a mechanical shock at the same time as the opening and/or closing operation. The piezoelectric element converts the mechanical energy obtained by mechanical shock into electrical energy, and uses this electrical energy to send out weak electromagnetic waves of a specific frequency for a short time every time the opening and/or closing operation is performed. Using switches, departments that perform intensive monitoring and recording receive the above-mentioned weak electromagnetic waves to carry out their work.

[Effect]

By doing the above, a department that performs intensive monitoring and recording will be able to detect the opening or closing of a specific switch based on the frequency of the received electromagnetic waves. There is no need for a special power source to construct a system for this purpose, and the equipment that needs to be added can be extremely simple and small. Also,
Since electromagnetic waves in the radio frequency band are used, unlike remote sensing using ultrasonic waves or infrared rays, it is generally not susceptible to interference from equipment installed indoors.

〔Example〕

For example, when the present inventor actually measured a piezoelectric element for igniting gas appliances, when a practical level of mechanical shock was applied, the half-width time was approximately 3 to 4 ms, and 10X103
It was found that a voltage of approximately V was generated. Furthermore, as shown in FIG. 2, the electrical energy was generated in a distributed manner over an extremely wide frequency band extending beyond 4 GHz, reaching a particularly high level in the 300-500 MHz band.

In the present invention, in the 300 to 500 MHz band, the distance 1el
It uses weak electromagnetic waves with an electric field strength of 15 μV/m or less when measured at 100 m.

FIG. 1 is a block diagram showing an embodiment of the present invention, in which 1 is a switch section, 2 is a piezoelectric element attached to the switch, and 2a is a piezoelectric element that is connected mechanically to the piezoelectric element when the switch section opens and closes. The impact hammer 3 is a tank circuit designed to resonate at a desired specific frequency.

As can be seen from this figure, the time during which electromagnetic waves are sent out from the antenna attached to the tank circuit 3 is equal to the time during which the piezoelectric element 2 continues to generate voltage, which is at most 3 to 4 rgs.
It is. Furthermore, since the number of target switches is not very large, there is no need to make the frequency band transmitted from the antenna extremely narrow and sharp. Therefore, the transmission mechanism on the switch side is extremely simple and compact. In addition, since the opening or closing operation of a switch is normally performed before the equipment subject to maintenance or inspection starts operating, or after a predetermined operation has been completed, the weak electromagnetic waves emitted from the switch may be used for maintenance or inspection. There is no risk of causing the electronic equipment to be inspected to malfunction or erroneously falsifying maintenance or inspection results. In the embodiment shown in this figure, electromagnetic waves of the same frequency are emitted during opening and closing operations, but if necessary, electromagnetic waves of different frequencies may be emitted during opening and closing. You can also do it.

The centralized monitoring and recording department requires a power source to constantly stand by and maintain a state in which it can receive weak electromagnetic waves of different frequencies from each switch, but this power is generally consumed only by this department. Since the amount of electricity required is small, battery power is sufficient. If a battery power source is used, it becomes independent from the power source of the electronic equipment that is subject to maintenance and inspection.
Work can be done easily. In addition, centralized monitoring and recording operations do not need to be performed at a fixed location, and equipment for such purposes can be made quite compact, so it is portable and can be easily used by maintenance and inspection workers. You can also carry it with you when you move.

During maintenance and inspection of large electronic equipment systems, there are a large number of switches that need to be opened and closed, and if the open/closed states of these switches are misidentified, completely incorrect data may be obtained, and in some cases, there is a risk of damaging the system being inspected. However, if the switches of the present invention are installed at required locations on the system to be inspected, and the open/closed states of these switches are constantly and intensively monitored and recorded during maintenance and inspection, errors will not occur.

〔Effect of the invention〕

As described above, according to the present invention, when performing maintenance and inspection work on an electronic device system, it is possible to accurately grasp the open/closed state of a switch at a specific location, and the correct work can be easily performed.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between the frequency and level of electric energy generated when a shock is applied to a piezoelectric element. 1--Switch section, 2--Piezoelectric element, 2a
-Hammer, 3-・Tank circuit.

Claims (1)

[Claims] 1. A piezoelectric element is attached to a switch that uses an elastic body to reliably operate the opening/closing mechanism so that it receives mechanical shock at the same time as the opening and/or closing operation. This device converts mechanical energy into electrical energy, and uses this electrical energy to send out weak electromagnetic waves of a specific frequency for a short time each time the device opens and/or closes. switch.