JPS6039727A - Noncontacting contact signal transmitter - 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 (Technical Field) The present invention uses a contact signal as a detection signal for an event occurring on a moving pallet or a rotating take in an automatic processing machine or an automatic assembly machine. Non-contact contact signal transmission for transmitting the signal to the stationary side when the signal is applied (background technology) Conventionally, slip rings or contacts have been used for this type of application. Fig. 1 shows an example of the configuration of a slip ring. In the figure, 1 is a rotating table, 2 is a head that holds a workpiece, 3 is a sensor with a contact point that detects an event, and 4 is a slip ring.However, since a slip ring has a contact point, There is a problem that troubles such as poor contact occur.On the other hand, the contactor is constructed as shown in Figure 2.In the figure, 5 is a rotary table, 6 is a contact post, and 7 is a contact finger. However, since the contactor has a contact portion like a slip ring, there is a problem that troubles such as poor contact occur.

(Objective of the Invention) The present invention aims to solve these conventional problems and make it possible to transmit contact signals without contact. a grid depth meter having an oscillating coil and a capacitor; a threshold setting means for setting a preadjustable threshold value; and a dip due to the set threshold value and the formation of the resonant circuit. The non-contact signal transmission device includes a comparator that compares the output voltage of the grid depth meter with the output voltage of the grid depth meter.

Hereinafter, the present invention will be explained in detail based on the drawings.

(Structure and operation of the invention) FIG. 3 is a block diagram showing an embodiment of the invention. In the figure, block A indicates the movable side, and block B indicates the fixed side. In block A, 11 is a coil, 13
12 is a capacitor, and 12 is an event detection contact that is closed by a change in an event such as detection of an object, and a micro switch or vacuum sensor is used.
The closing of is the contact signal that should be transmitted to the fixed side. These are connected in series, and when the event detection contact 12 is closed due to a change in the event, a parallel resonant circuit consisting of the coil 11 and the capacitor 13 is formed.

On the other hand, in block B, 14 is a grid dip meter whose oscillation frequency is adjusted to match the resonant frequency of the parallel resonant circuit. Reference numeral 15 denotes a threshold setting means for setting an adjustable threshold, and the threshold is set in advance so as to be equal to or lower than the dipped voltage from the grid dip meter 14. 16 is a threshold setting section 1
Threshold value set in 5 and grid dip meter 14
A signal is output when the dipped voltage is below a threshold value.

Here, the positional relationship between blocks A and B is such that when a movable station such as a rotary head is positioned with a stationary station for processing or assembly, the coil 12 and the oscillation coil of the grid dip meter 14 are Adjusted for electromagnetic coupling.

Next, the operation will be explained.

Before an event occurs, the event detection contact 12 is closed, a parallel resonant circuit is not formed, and the output of the coil 11 does not change. On the other hand, when an event occurs, the event detection contact 12 is closed and a parallel resonant circuit is formed. At this time, the coil 11 and the oscillation coil of the grid dip meter 14 are
As mentioned above, it is located at a position where there is sufficient electromagnetic coupling. Therefore,
The oscillation force of the grid dip meter 14 is absorbed by the parallel resonant circuit composed of the coil 11 and the capacitor 13, and the output voltage of the grid dip meter 14 is reduced. This output voltage is supplied to the comparator 16, and the threshold setting section 15
is compared with the threshold set by . Since the threshold value is set above the dipped output voltage as described above, an output signal is obtained at the output terminal 6 of the comparator.

In this way, even though the coil on the moving side and the coil on the fixed side are separated by space, the opening and closing of the event detection contact on the moving side can be extracted as a change in the output voltage on the fixed side, so the contact There is no need to provide a contact part for signal transmission.

(Effects of the Invention) The present invention uses electromagnetic coupling between coils separated by space to detect whether a resonant circuit is established or not, so the advantage is that contact signals can be transmitted to the other end without contact. There is,
Furthermore, since the contact side requires no power at all, it can be used to detect events that occur on the moving side of the fixed side of turntable type and transfer type processing and assembly equipment.

[Brief explanation of the drawing]

FIG. 1 is a configuration example of a slip ring, FIG. 2 is a configuration example of a contact, and FIG. 3 is a configuration diagram showing an embodiment of the present invention. 11...Coil,]2...Event detection contact 13°°・
Capacitor, 14... Grid dip meter 15.
...Threshold setting section, 16...Comparator A...Moving side, B...Fixed side Patent applicant Oki Electric Industry Co., Ltd. Patent application agent Megumi Yamamoto - Desk/Diagram hole 3 figure

Claims (1)

[Claims] A resonant circuit that has a coil and a capacitor that are formed by closing a contact that detects an event, a grid depth meter that has an oscillation coil that can be electromagnetically coupled to the resonant circuit, and a pre-adjustable threshold temperature and value. and a comparator that compares the set threshold value with the output voltage of the grid depth meter that dips due to the formation of the resonant circuit. Contact signal transmission device.