CN218349521U

CN218349521U - Capacitive sensor

Info

Publication number: CN218349521U
Application number: CN202222147651.6U
Authority: CN
Inventors: 王平
Original assignee: Foshan Shunde Saier Sensor Co ltd
Current assignee: Foshan Shunde Saier Sensor Co ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2023-01-20
Anticipated expiration: 2032-08-15

Abstract

The utility model discloses a capacitive sensor, including PCBA subassembly, first power cord, second power cord and signal output line. The utility model discloses a capacitive sensor through set up the PCBA subassembly and with this PCBA subassembly fixed connection's three pencil (be first power cord respectively, second power cord and signal output line) for outside direct current power supply can be to this capacitive sensor's power supply, external signal receiving arrangement can receive the signal of telecommunication by this capacitive sensor output, this capacitive sensor's detection function can be realized, this capacitive sensor's part figure is less, moreover, the steam generator is simple in structure, the inner structure thereof is simplified, be favorable to reducing the cost of its production preparation, and be favorable to improving sensor job stabilization nature.

Description

Capacitive sensor

Technical Field

The utility model relates to a detect technical field, especially relate to a capacitanc sensor.

Background

The capacitive sensor used for liquid detection or object detection in the current market is often provided with more parts, and the connection relationship between the parts is complex, so that the production cost is not reduced, and the working stability of the sensor is not facilitated.

Therefore, how to simplify the structure of the capacitive sensor to facilitate reducing the manufacturing cost and improving the working stability of the sensor is a technical problem that needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a capacitanc sensor is provided, is favorable to reducing the cost of production preparation to and be favorable to improving sensor job stabilization nature.

In order to solve the technical problem, the utility model discloses a capacitive sensor, include:

the PCBA assembly is provided with a microcontroller and an induction disc electrically connected with a first IO port of the microcontroller, and is also provided with a plurality of welding discs;

one end of the first power line is fixedly connected to the first bonding pad, and the other end of the first power line is electrically connected with one output end of an external direct-current power supply;

one end of the second power line is fixedly connected to the second bonding pad, and the other end of the second power line is electrically connected with the other output end of the external direct-current power supply;

one end of the signal output line is fixedly connected to the third bonding pad, the other end of the signal output line is electrically connected with an external signal receiving device, and the third bonding pad is also electrically connected with a second IO port of the microcontroller;

wherein, the external direct current power supply passes through first power cord with the second power cord, to PCBA subassembly power supply, external signal receiving arrangement receives the electrical signal of following PCBA subassembly output through the signal output line.

It can be seen that, the utility model discloses a capacitive sensor through set up the PCBA subassembly and with this PCBA subassembly fixed connection's three pencil (be first power cord, second power cord and signal output line respectively) for outside DC power supply can be to this capacitive sensor's power supply, outside signal receiver can receive the signal of telecommunication by this capacitive sensor output, this capacitive sensor's detection function can be realized, this capacitive sensor's part figure is less, moreover, the steam generator is simple in structure, the internal structure has been simplified, be favorable to reducing the cost of its production preparation, and be favorable to improving sensor job stabilization nature.

Further, a resistor R1 is electrically connected between the third pad and the second IO port of the microcontroller.

Further, a capacitor C1 is electrically connected between the power supply port of the microcontroller and the ground port of the microcontroller.

Further, the capacitive sensor still includes the casing, the PCBA subassembly sets up in the casing, first power cord, second power cord and signal output line set up in the front side of casing to the direction that keeps away from the casing extends.

Furthermore, a clamping part is arranged on the inner wall of the shell and is clamped and connected with one side of the PCBA component, so that the PCBA component is fixed in the shell.

Further, a gap between the PCBA assembly and the shell is filled with epoxy resin.

Further, a groove portion is provided on at least one of the left and right sides of the housing, an opening of the groove portion being outward and the groove portion extending from the front side of the housing to the rear side of the housing.

Furthermore, a threaded hole is formed in the outer wall of the shell.

Furthermore, the capacitive sensor further comprises a connector, the connector is provided with a plurality of ports, the first power line is electrically connected with one output end of the external direct-current power supply through the first port, the second power line is electrically connected with the other output end of the external direct-current power supply through the second port, and the signal output direction is electrically connected with the external signal receiving device through the third port.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a partial circuit schematic of a PCBA assembly in accordance with an embodiment of the present invention;

FIG. 2 is a partial circuit schematic of a PCBA assembly in accordance with an embodiment of the present invention;

fig. 3 is a schematic diagram of an overall structure of a capacitive sensor according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 5 is a front view of a housing of an embodiment of the invention;

fig. 6 is a rear view of a housing of an embodiment of the invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between different objects and not necessarily for describing a particular order.

The utility model discloses a capacitive sensor, including PCBA subassembly (PCBA, printed Circuit Board Assembly), first power cord, second power cord and signal output line. The external direct current power supply supplies power to the PCBA component through the first power line and the second power line, and the external signal receiving device receives the electric signals output from the PCBA component through the signal output line. Specifically, as shown in fig. 1, the PCBA assembly is provided with a microcontroller U1 (optionally, the microcontroller U1 may be a chip of FO16015 type), and a sense pad KEY (optionally, the sense pad KEY may be a touch sense pad) electrically connected to a first IO port PA5 of the microcontroller U1; the PCBA assembly is further provided with a plurality of bonding pads, as shown in fig. 2, one end of a first power line is fixedly connected to the first bonding pad +, the other end of the first power line is electrically connected with one output end of an external direct-current power supply, one end of a second power line is fixedly connected to the second bonding pad-, the other end of the second power line is electrically connected with the other output end of the external direct-current power supply, one end of a signal output line is fixedly connected to a third bonding pad D, the other end of the signal output line is electrically connected with an external signal receiving device, and the third bonding pad D is further electrically connected with a second IO port PA2 of the microcontroller U1.

Optionally, the first power line, the second power line and the signal output line may be fixedly connected to corresponding pads of the PCBA assembly by soldering.

Optionally, as shown in fig. 1, in order to reduce the risk of damage to the microcontroller U1 due to unstable current or voltage, a resistor R1 may be electrically connected between the third pad and the second IO port PA2 of the microcontroller U1.

Optionally, as shown in fig. 2, a capacitor C1 is electrically connected between the power supply port VDD of the microcontroller U1 and the ground port VSS of the microcontroller U1, so that on one hand, power supply of the microcontroller U1 is stable, and on the other hand, signal interference from a power supply terminal on the microcontroller U1 can be reduced.

As shown in fig. 3 to 6, the capacitive sensor may be further provided with a housing 100 in order to facilitate mounting of parts. Specifically, the PCBA assembly is disposed in the housing 100, and the first power supply line 210, the second power supply line 220, and the signal output line 230 are disposed on the front side of the housing 100 and extend in a direction away from the housing 100. Optionally, in order to facilitate the connection of the capacitive sensor with an external device, the capacitive sensor further comprises a connection port 300. The connector 300 is provided with a plurality of ports, the first power line 210 is electrically connected to one output terminal of an external dc power supply through the first port, the second power line 220 is electrically connected to another output terminal of the external dc power supply through the second port, and the signal output terminal is electrically connected to an external signal receiving device through the third port.

Further, a clamping portion 110 is provided on the inner wall of the housing 100, and the clamping portion 110 is clamped and connected to one side of the PCBA assembly, so that the PCBA assembly is fixed in the housing 100, which facilitates the assembly and disassembly of the PCBA assembly in the housing 100.

Still further, the gap between the PCBA assembly and the housing 100 may be filled with epoxy, taking into account the robustness of the installation and the sealing requirements of the particular scenario (e.g., placing the sensor in a liquid).

Still further, in order to enable the capacitive sensor to be fixed in a snap-fit connection manner in a use environment, a groove portion 120 is provided on at least one of the left and right sides of the housing 100, an opening of the groove portion 120 is outward and the groove portion 120 extends from the front side of the housing 100 to the rear side of the housing 100.

Still further, the capacitive sensor may be fixed in the use environment by means of a screw connection, and specifically, the outer wall of the housing 100 may be provided with a threaded hole 130.

Finally, it should be noted that: the capacitive sensor disclosed in the embodiment of the present invention is only a preferred embodiment of the present invention, and is only used to illustrate the technical solution of the present invention, not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A capacitive sensor, comprising:

2. A capacitive sensor according to claim 1, characterised in that a resistor R1 is electrically connected between the third pad and the second IO port of the microcontroller.

3. A capacitive sensor according to claim 1 in which a capacitance C1 is electrically connected between a power supply port of the microcontroller and a ground port of the microcontroller.

4. A capacitive sensor according to claim 1 further comprising a housing in which the PCBA assembly is disposed, the first and second power supply lines and signal output line being disposed on a front side of the housing and extending away from the housing.

5. A capacitive sensor according to claim 4 wherein the inner wall of the housing is provided with a snap-fit portion which snap-fits into one side of the PCBA component so that the PCBA component is secured in the housing.

6. A capacitive sensor according to claim 4 in which the gap between the PCBA component and the housing is filled with epoxy.

7. A capacitive sensor according to claim 4 wherein at least one of the left and right sides of the housing is provided with a recessed portion which opens outwardly and which extends from the front of the housing to the rear of the housing.

8. A capacitive sensor according to claim 4 in which the housing is provided with a threaded aperture in an outer wall thereof.

9. The capacitive sensor of claim 1, further comprising a connector having a plurality of ports, wherein the first power line is electrically connected to one output terminal of the external dc power source through a first port, the second power line is electrically connected to another output terminal of the external dc power source through a second port, and the signal output is electrically connected to an external signal receiving device through a third port.