JPH05340968A - Automatic detecting method of type of probe - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a method for reliably detecting the damping ratio of a probe device even when the surroundings are electrically or mechanically unstable. [Problem] A probe device, which corresponds to a connecting portion between a probe device and an oscilloscope main body, has a probe connecting connector that is fitted in a predetermined place, and has a protrusion on a surface that contacts the oscilloscope, A switch for detecting the position of the protrusion on the outer frame of the circle of the surface of the oscilloscope connection connector that is in contact with the probe for fitting the connection connector at a predetermined location, which corresponds to the connection portion with the oscilloscope body. An automatic detection method for detecting the type of probe based on the positional relationship between the protrusion on the probe device and the switch on the oscilloscope body when the connector is connected.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to automatic detection of the type of probe device used in an oscilloscope.

[0002]

The most popular type of probe device is the damping ratio. Conventionally, the following method has been mentioned as a method of detecting this damping ratio. First
As a method of, the BNC connector in the probe device is provided with a connection point for detecting the resistance value between the common (where the common potential is shown) and the place where the signal is input to the main body
By reading the resistance value with the oscilloscope body, the attenuation ratio in the probe device is read. In this method, since the structure of the pin that serves as a connection point for detecting the resistance value is complicated, there is no durability and a connection failure often occurs. The second method is BNC on the probe device side.
The edge of the connector is wider than usual, and an electrical contact point is provided around the edge of the BNC connector on the main body side of the digital oscilloscope. At this time,
When the BNC connector is fitted, it is determined whether or not the probe device is connected by detecting the conduction between the edge and the electrical contact point.

[0003]

Therefore, the first method cannot detect an accurate damping ratio due to a poor connection.
Trouble often occurs. Further, in the second method, since it is detected only whether or not the probe device is connected, it is impossible to judge whether the attenuation ratio is 1/10 or 1/100. In addition, both the first and second methods detect the attenuation ratio and the like by electrical contact, so that the contact surface may become dirty or the surroundings may be electrically unstable (field). There is a problem that the detection result is unstable. The present invention has been made paying attention to such a point, and its purpose is to reliably reduce the attenuation ratio (type) of the probe device even if the contact surface is dirty or the surroundings are electrically or mechanically unstable. ) Is to provide a method of detecting.

[0004]

The present invention corresponds to a connecting portion between a probe device and an oscilloscope main body, and is a first connector fitted to a predetermined place and provided with a projection on a surface contacting the oscilloscope. Corresponding to a connecting portion between the probe device and the oscilloscope main body having a probe, and a circular outer frame of a surface of the second connector for contacting the probe of the second connector for fitting the connector at a predetermined location. An oscilloscope main body having a plurality of switches for detecting the position of the protrusion is provided, and when the connector is connected, the attenuation ratio of the probe is automatically detected by the positional relationship between the protrusion on the probe device and the switch on the oscilloscope main body. Is a method for automatically detecting the type of probe.

[0005]

In the present invention, a protrusion is provided at the end of the BNC connector on the probe device side, and the position of the protrusion is mechanically detected by a detection switch provided in the oscilloscope body, or between the probe and the oscilloscope the same as the above-mentioned principle. Since it is detected by the optical detection switch of, the attenuation ratio (type) of the probe device can be detected in a stable operation.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A mechanical embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 5 show a component device for detecting the damping ratio according to the present invention. FIG. 1 shows the configuration of the probe device. 10
Indicates the probe device itself, 11 is a protrusion, and 12 is a fitting recess. FIG. 2 is a front view of the probe device 10 shown in FIG. FIG. 3 shows a constituent device of the attenuation ratio detecting portion in the oscilloscope body. Two
Reference numeral 0 is an oscilloscope body, 21 is a switch for detection, and 22 is a fitting convex portion. FIG. 4 is a side view of the oscilloscope body of FIG. FIG. 5 shows a state in which the probe device and the oscilloscope body are fitted together.

An automatic probe detection method using the above configuration will be described. In the probe device 10, FIG.
As shown in (a) and (b), the protrusion 11 is present at a different position with respect to the fitting recess 12 depending on the damping ratio. Further, in the oscilloscope main body 20, as shown in FIG. 3, the plurality of switches 21 are present at different positions with respect to the fitting convex portion 22.

Further, when the probe device 10 and the oscilloscope body 20 are fitted, the fitting position is as shown in FIG.
As shown in (4), they are fixed by the fitting concave portion 12 and the fitting convex portion 22. Therefore, the switch 21 to be pushed differs depending on the position of the protrusion 11. A push switch is used as the switch 21. Therefore, by detecting the pressed switch in the switch 21, the protrusion 1 corresponding to the fitting recess 12 is formed.
The oscilloscope main body can detect whether the position of 1 is as shown in FIG. 2 (a) or as shown in FIG. 2 (b). The position of the protrusion 11 is shown in FIG.
Since (a) or (b) represents the difference in the attenuation ratio, the attenuation ratio of the probe can be automatically detected.

The above method will be described with a specific operation. Insert the probe device 10 into the BNC connector (fitting concave portion 12 and fitting convex portion 22) of the oscilloscope body 20,
The BNC connector is locked by twisting 90 degrees clockwise. At the same time as this locking operation, the position of the protrusion 11 provided on the probe device 10 is also fixed. It is assumed that a pin for pushing the switch 21 is provided below the protruding portion 11 on the panel surface of the oscilloscope body 20 in this fixed state. Then, when the probe device is completely fixed or locked, the pin is pushed in and the switch 21 is turned on. Therefore, as a first effect, it can be detected that the probe is connected.
As a second effect, the attenuation ratio of the probe device is 1/10 in FIG. 2A, and the attenuation ratio of the probe is 1/10 in FIG. 2B.
When it is set to 0, a pin for pushing the switch 21 is provided at a position on the panel surface of the oscilloscope main body 20 corresponding to the protrusion 11, so that the attenuation ratio of the probe device can be detected. It is also possible to detect the position of the protrusion by using an optical switch as the mechanical switch described above.

[0010]

As described in detail above, according to the present invention, the damping ratio in the probe device can be detected without depending on the electrical connection.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of the present invention.

FIG. 2 is an external view of an embodiment of the present invention.

FIG. 3 is an external view of an embodiment of the present invention.

FIG. 4 is an external view of an embodiment of the present invention.

FIG. 5 is an external view of an embodiment of the present invention.

[Explanation of symbols]

 10 probe device 11 protrusion 12 fitting recess 20 oscilloscope body 21 switch 22 fitting protrusion

Claims (1)

[Claims] 1. A probe device, which corresponds to a connecting portion between a probe device and an oscilloscope main body, has a first connector which is fitted in a predetermined place, and has a projection on a surface which comes into contact with the oscilloscope, A portion corresponding to a connecting portion between the device and the oscilloscope main body, for detecting the position of the protrusion on an outer frame of a circle of a surface of the second connector for fitting the connector at a predetermined position, which is in contact with the probe. An oscilloscope main body having a plurality of switches is provided, and when the connector is connected, the attenuation ratio of the probe is automatically detected by the positional relationship between the protrusion on the probe device and the switch on the oscilloscope main body. Automatic detection method.