Three-axis composite sensor

Abstract

The present invention discloses a three-axis composite sensor, which relates to the field of sensor technology and includes a circuit board, a connector, a housing and a structure. A sensor module, an operational amplifier circuit module and a power supply circuit module are provided on the circuit board. The sensor module can simultaneously collect vibration signals and impact pulse signals in three spatial axes. The operational amplifier circuit module is used to amplify the signal output by the sensor module. The power supply circuit module is used to supply power to the circuit board. A wire is installed in the connector, and the wire is electrically connected to the operational amplifier circuit module and the power supply circuit module respectively, so as to output the signal processed by the operational amplifier circuit module to the outside and transmit external electric energy to the power supply circuit module. The housing is sleeved on the outside of the circuit board and connected to the connector. The structure is arranged between the circuit board and the housing, and is fixedly connected to the circuit board and the housing respectively, so as to transmit the vibration of the housing to the circuit board. Compared with the prior art, the three-axis composite sensor can monitor vibrations in multiple directions at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a three-axis composite sensor. Background Art

[0002] In order to monitor the working status of rotating equipment, it is usually necessary to set up a vibration sensor. Sensors that monitor a single vibration direction have great limitations and cannot quickly and accurately identify equipment failures, posing great hidden dangers. Summary of the invention

[0003] The purpose of the present invention is to provide a three-axis composite sensor to solve the problems existing in the above-mentioned related technologies and monitor vibrations in multiple directions at the same time.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The invention discloses a three-axis composite sensor, comprising:

[0006] A circuit board, wherein a sensor module, an operational amplifier circuit module and a power supply circuit module are provided on the circuit board; the sensor module can simultaneously collect vibration signals and impact pulse signals in three spatial axes; the operational amplifier circuit module is used to amplify the signal output by the sensor module; and the power supply circuit module is used to supply power to the circuit board;

[0007] A connector, wherein a wire is installed in the connector, and the wire is electrically connected to the operational amplifier circuit module and the power supply circuit module respectively, so as to output the signal processed by the operational amplifier circuit module to the outside and transmit external electric energy to the power supply circuit module;

[0008] A housing, which is sleeved on the outside of the circuit board and connected to the connector;

[0009] A structure is disposed between the circuit board and the shell and is fixedly connected to the circuit board and the shell respectively, and is used to transmit the vibration of the shell to the circuit board.

[0010] Preferably, the connector and the shell are both made of metal.

[0011] Preferably, the joint is connected to the shell by welding.

[0012] Preferably, the structure comprises a shielding shell and an insulator; the shielding shell is used for electromagnetic shielding; the insulator is arranged between the shielding shell and the shell body to separate the shielding shell from the shell body.

[0013] Preferably, the shell and the insulator, the insulator and the shielding shell, and the shielding shell and the circuit board are all bonded and connected by structural adhesive.

[0014] Preferably, a strip groove is provided in the shielding shell, and the circuit board is inserted into the strip groove.

[0015] Preferably, the insulator and the shielding shell are concentrically arranged cylindrical structures.

[0016] Preferably, an outer groove is provided on the outer side surface of the insulator, and an inner groove is provided on the inner side surface of the insulator. Both the outer groove and the inner groove extend along the axial direction of the insulator, and both the outer groove and the inner groove are filled with a glue layer.

[0017] Preferably, the insulator and the adhesive layer are both made of epoxy resin.

[0018] Preferably, the three-axis composite sensor further includes a locking bolt; the shell includes a cylinder body 1 and a cylinder body 2 which are angled with each other and fixedly connected, the locking bolt passes through the cylinder body 1, the circuit board and the structure are located in the cylinder body 2, and the connector is connected to an end of the cylinder body 2 which is away from the cylinder body 1.

[0019] Compared with the related art, the present invention has achieved the following technical effects:

[0020] The structure is fixedly connected to the circuit board and the housing to form a whole, which is conducive to the transmission of force. When in use, the housing is fixed on the workpiece whose vibration needs to be monitored, and the vibration of the workpiece is transmitted to the circuit board through the housing and the structure. The vibration is collected by the sensor module, and the collected signal is transmitted to the operational amplifier circuit module. The operational amplifier circuit module amplifies the signal and transmits it to the outside world.

[0021] Since the sensor module can simultaneously collect vibration signals and impact pulse signals in three spatial axes, it can monitor vibrations in multiple directions at the same time, providing conditions for quickly identifying equipment failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a schematic diagram of a three-axis composite sensor according to an embodiment of the present invention;

[0024] Figure 2 An exploded diagram of a three-axis composite sensor according to an embodiment of the present invention;

[0025] Figure 3 is a cross-sectional view of a three-axis composite sensor according to an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of an insulator;

[0027] Figure 5 is a schematic diagram of a shielding shell;

[0028] Figure 6 A schematic diagram of the circuit board.

[0029] In the figure: 1-locking bolt; 2-housing; 3-insulator; 4-shielding shell; 5-circuit board; 6-connector; 51-power supply module; 52-op amp circuit module; 53-sensor module. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a three-axis composite sensor to solve the problems existing in the above-mentioned related technologies and monitor vibrations in multiple directions at the same time.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1 to Figure 6 This embodiment provides a three-axis composite sensor, including a circuit board 5, a connector 6, a housing 2 and a structure.

[0034] A sensor module 53, an operational amplifier circuit module 52 and a power supply circuit module 51 are provided on the circuit board 5. The sensor module 53 can simultaneously collect vibration signals and impact pulse signals in three spatial axial directions (X-axis direction, Y-axis direction and Z-axis direction). The operational amplifier circuit module 52 is used to amplify the signal output by the sensor module 53, and the power supply circuit module 51 is used to supply power to the circuit board 5. A wire is installed in the connector 6, and the wire is electrically connected to the operational amplifier circuit module 52 and the power supply circuit module 51 respectively, so as to output the signal processed by the operational amplifier circuit module 52 to the outside and transmit external electrical energy to the power supply circuit module 51. The housing 2 is sleeved on the outside of the circuit board 5 and connected to the connector 6. The structure is arranged between the circuit board 5 and the housing 2, and is fixedly connected to the circuit board 5 and the housing 2 respectively, so as to transmit the vibration of the housing 2 to the circuit board 5.

[0035] The working principle of the three-axis composite sensor in this embodiment is as follows:

[0036] The structure is fixedly connected to the circuit board 5 and the housing 2 respectively to form a whole, which is conducive to the transmission of force. When in use, the housing 2 is fixed on the workpiece whose vibration needs to be monitored, and the vibration of the workpiece is transmitted to the circuit board 5 through the housing 2 and the structure. The vibration is collected by the sensor module 53, and the collected signal is transmitted to the operational amplifier circuit module 52. The operational amplifier circuit module 52 amplifies the signal and transmits it to the outside world. There are at least two wires in the connector 6, one of which is connected to the power supply circuit module 51 for transmitting electric energy to the power supply circuit module 51, and the other is connected to the operational amplifier circuit module 52 for transmitting the signal amplified by the operational amplifier circuit module 52 to the outside world.

[0037] As a possible example, in this embodiment, the connector 6 and the shell 2 are both made of metal, so that the connector 6 and the shell 2 can play a role of electromagnetic shielding, thereby protecting the internal circuit board 5.

[0038] As a possible example, in this embodiment, the joint 6 is welded to the housing 2 to improve the connection strength of the connection portion between the two and avoid separation under severe vibration. According to different actual needs, those skilled in the art may also adopt other connection methods, such as bonding the joint 6 to the housing 2.

[0039] As a possible example, in this embodiment, the structure includes a shielding shell 4 and an insulator 3. The shielding shell 4 is used for electromagnetic shielding. The insulator 3 is arranged between the shielding shell 4 and the shell 2, and is used to separate the shielding shell 4 from the shell 2. By arranging the shielding shell 4 in the shell 2, it can play a role of secondary shielding, improve the electromagnetic shielding effect, and thus better protect the internal circuit board 5. The insulator 3 separates the shell from the shielding shell 4, and no current is transmitted between the shell and the shielding shell 4, so that the shell and the shielding shell 4 each play an electromagnetic shielding role.

[0040] Exemplarily, the shielding shell 4 is made of aluminum alloy.

[0041] As a possible example, in this embodiment, the housing 2 and the insulator 3, the insulator 3 and the shielding shell 4, and the shielding shell 4 and the circuit board 5 are all bonded together by structural adhesive. By using structural adhesive for bonding, the relative positions of two adjacent components are ensured, thereby improving the consistency of the overall vibration frequency and vibration amplitude.

[0042] As a possible example, in this embodiment, a strip groove is provided in the shielding shell 4, and the circuit board 5 is inserted into the strip groove. Exemplarily, there are two strip grooves and they are positioned opposite to each other, and the two side edges of the circuit board 5 are respectively inserted into the two strip grooves. By using the strip groove to limit the circuit board 5, on the one hand, it is convenient to install the circuit board 5, and the circuit board 5 can be inserted along the strip groove by sliding, and after the insertion is completed, it is bonded by structural adhesive; on the other hand, the strip groove can limit the circuit board 5 from both sides to ensure the consistency of the vibration frequency and vibration amplitude of the circuit board 5 and the shielding shell 4.

[0043] As a possible example, in this embodiment, the insulator 3 and the shielding shell 4 are cylindrical structures arranged concentrically. It can be understood that the end of the shielding shell 4 should be closed by its own end surface or adjacent components to ensure its electromagnetic shielding effect.

[0044] As a possible example, in this embodiment, an outer groove is provided on the outer side surface of the insulator 3, and an inner groove is provided on the inner side surface of the insulator 3. Both the outer groove and the inner groove extend along the axial direction of the insulator 3, and both the outer groove and the inner groove are filled with a glue layer. It should be noted that the above-mentioned structural adhesive can only play a role of fixed connection, and there is still a gap between adjacent components. Due to the existence of the gap, the vibration frequency and vibration amplitude of adjacent components may be inconsistent, and even collision may occur, affecting the transmission of vibration energy. In this embodiment, on the basis of using structural adhesive, by further providing a glue layer to fill the gap, the consistency of the vibration process of adjacent components can be improved.

[0045] Exemplarily, the insulator 3 and the adhesive layer are both made of epoxy resin. In actual use, the liquid epoxy resin is injected from the ends of the outer groove and the inner groove. After the epoxy resin fills the outer groove and the inner groove, it can also diffuse into other gaps. The outer groove and the inner groove provide a certain depth dimension to facilitate the rapid injection of the epoxy resin.

[0046] As a possible example, in this embodiment, the three-axis composite sensor further includes a locking bolt 1. The housing 2 includes a cylinder body 1 and a cylinder body 2 which are fixedly connected at an angle to each other, the locking bolt 1 passes through the cylinder body 1, the circuit board 5 and the structure are located in the cylinder body 2, and the connector 6 is connected to an end of the cylinder body 2 away from the cylinder body 1.

[0047] Exemplarily, the through hole on the cylinder body 1 through which the locking bolt 1 passes is not provided with an internal thread, so that before the locking bolt 1 is locked, the shell 2 can rotate around the locking bolt 1, thereby facilitating the adjustment of the installation angle of the shell 2 according to the actual installation space.

[0048] Exemplarily, the first cylinder and the second cylinder are perpendicular to each other and both are cylindrical.

[0049] As a possible example, in this embodiment, the connector 6 has an external thread, and the wire in the connector 6 is located at the center of the connector 6. In actual use, the external plug-in module is connected to the connector 6 by rotating, and after rotating into place, the wire in the center of the connector 6 is connected to the wire in the center of the external plug-in module.

[0050] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A three-axis composite sensor, characterized in that: include: A circuit board, wherein a sensor module, an operational amplifier circuit module and a power supply circuit module are provided on the circuit board; the sensor module can simultaneously collect vibration signals and impact pulse signals in three spatial axes; the operational amplifier circuit module is used to amplify the signal output by the sensor module; and the power supply circuit module is used to supply power to the circuit board; A connector, wherein a wire is installed in the connector, and the wire is electrically connected to the operational amplifier circuit module and the power supply circuit module respectively, so as to output the signal processed by the operational amplifier circuit module to the outside and transmit external electric energy to the power supply circuit module; A housing, which is sleeved on the outside of the circuit board and connected to the connector; A structure is disposed between the circuit board and the shell and is fixedly connected to the circuit board and the shell respectively, and is used to transmit the vibration of the shell to the circuit board.

2. The three-axis composite sensor according to claim 1, characterized in that: The joint and the shell are both made of metal.

3. The three-axis composite sensor according to claim 2, characterized in that: The joint is connected to the shell by welding.

4. The three-axis composite sensor according to claim 2, characterized in that: The structure comprises a shielding shell and an insulator; the shielding shell is used for electromagnetic shielding; the insulator is arranged between the shielding shell and the shell body, and is used for separating the shielding shell from the shell body.

5. The three-axis composite sensor according to claim 4, characterized in that: The shell and the insulator, the insulator and the shielding shell, and the shielding shell and the circuit board are all connected by bonding through structural adhesive.

6. The three-axis composite sensor according to claim 4, characterized in that: A strip groove is arranged in the shielding shell, and the circuit board is inserted into the strip groove.

7. The three-axis composite sensor according to claim 4, characterized in that: The insulator and the shielding shell are cylindrical structures arranged concentrically.

8. The three-axis composite sensor according to claim 7, characterized in that: An outer groove is provided on the outer side surface of the insulator, and an inner groove is provided on the inner side surface of the insulator. Both the outer groove and the inner groove extend along the axial direction of the insulator, and both the outer groove and the inner groove are filled with a glue layer.

9. The three-axis composite sensor according to claim 8, characterized in that: The insulator and the adhesive layer are both made of epoxy resin.

10. The three-axis composite sensor according to claim 1, characterized in that: It also includes a locking bolt; the shell includes a cylinder body 1 and a cylinder body 2 that are angled with each other and fixedly connected, the locking bolt passes through the cylinder body 1, the circuit board and the structure are located in the cylinder body 2, and the connector is connected to one end of the cylinder body 2 that is away from the cylinder body 1.

Images