CN201141895Y - static capacitance sensor - Google Patents

Abstract

The utility model is a static capacitance sensor, comprising a shell, a circuit board is arranged inside the shell, and is connected with an indicator light, a sensitivity regulator, and an arc-shaped fitting groove, which provides a simple snap-fit with an arc-shaped electrode plate, and is then closed with a tail cover. The other side of the shell is provided with an arc-shaped sensing surface, which can be effectively approached to the surface of the detected object, increase the sensing area, and obtain the improvement of the sensitivity of the sensor in detecting static capacitance.

Description

static capacitance sensor

technical field

The utility model relates to an electrostatic capacitance sensor.

Background technique

The existing static capacitance sensor mainly uses a flat electrode plate to be directly welded on the circuit board, and then covered with a round or square shell, and the internal electrode plate is used to approach the static capacitance of the object under test to measure its electric storage value. However, because the electrode plate is flat, and the contact surface between the shell and the general cylindrical surface is only a straight line, relatively, the distance between the electrode plate and the object to be measured is farther, so the area that can be sensed is small and cannot be used effectively. Measure the actual capacitance value.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a static capacitance sensor to improve its measurement accuracy.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A kind of electrostatic capacity sensor, comprises a casing and a tail cover, and its inside is provided with a circuit board, is characterized in that: one side of described circuit board is combined with arc-shaped electrode plate, and the same side of casing is set as Arc-shaped sensing surface.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of being close to the outer surface of the cylindrical object to be measured, increasing the overall sensing area and improving the sensing accuracy.

Description of drawings

Fig. 1 is the exploded perspective view of the utility model;

Fig. 2 is a combined perspective view of the utility model;

Fig. 3 is a reference diagram of a specific embodiment of the present invention.

Explanation of reference signs: 1-shell; 11-arc-shaped sensing surface; 2-circuit board; 21-indicating light; 22-arc-shaped fitting groove; 3-arc-shaped electrode plate; 4-sensitivity regulator; 41-adjusting button; 5-tail cap; 6-object to be measured.

Detailed ways

Please refer to Fig. 1, shown in Fig. 2, the utility model comprises a shell 1, is provided with a circuit board 2 in it, can be combined with a sensitivity adjuster 4 and an indicator light 21 on the circuit board 2, and its side is then provided with a The arc-shaped fitting groove 22 can be used for the simple engagement and fixing of the arc-shaped electrode plate 3, and its exterior is closed by a tail cover 5. The tail cover 5 is provided with several openings for the adjustment of the induction regulator 4 The button 41 can be exposed and the light of the indicator light 21 can be emitted, and a panel 51 that can display the measured value is combined in addition. The side of the casing 1 close to the electrode plate 3 is also provided with a similar arc-shaped sensing surface 11 .

When in use, the adjustment knob 41 can be controlled first to set its sensitivity, and then the cylindrical object 6 to be tested is attached to the arc-shaped sensing surface 11, as shown in Figure 3, which is relatively close to the electrode plate 3 inside, so that the electrode The overall sensing surface of the board 3 and the object under test 6 is significantly improved, so the actual storage capacity of the electrostatic capacitance can be accurately and effectively measured, which is unmatched by the existing methods.

It is known that the implementation of the utility model can obviously improve the effect of induction under the premise of effectively increasing the sensing area, and obtain a more correct value for the actual storage of the static capacitance of the object to be measured. In addition, the utility model uses a simple way to fit the electrode plate and the circuit board, and also has improved functions.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (2)

1. A static capacity sensor comprises a shell and a tail cover, and a circuit board is arranged inside it, and it is characterized in that: one side of the circuit board is combined with arc-shaped electrode plates, and the same side of the shell Set as a circular arc sensing surface. 2 . The capacitance sensor according to claim 1 , wherein one side of the circuit board is provided with an arc-shaped fitting groove for directly engaging the arc-shaped electrode plate. 3 .

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