Microwave sensor

Abstract

The utility model discloses a microwave sensor comprising a housing notch and a rubber protective sleeve, the top of the housing is provided with the notch, the interior of the notch is provided with the rubber protective sleeve, the bottom of the rubber protective sleeve is bonded with a moving plate, the interior of the moving plate is provided with a shielding shell, one side of the shielding shell is connected with a clamping seat, and the other side of the shielding shell is connected with a clamping groove. A sensor body is clamped in the clamping seat, a radio frequency transceiving plate is arranged on the sensor body, a telescopic spring is fixed to the bottom of the moving plate, and a mounting plate is fixedly connected to the bottom end of the telescopic spring. According to the utility model, through the arrangement of the rubber protective sleeve, the interior of the notch is filled, dust and impurities are prevented from entering, under the action of the telescopic spring, the shielding shell retracts to the interior of the shell when being pressed, the shell provides an avoiding space for the shielding shell, damage to the sensor body during use is reduced, the shell is prevented from always wrapping the radio frequency transceiver board, and the service life of the radio frequency transceiver board is prolonged. And the normal use of the radio frequency transceiver board is influenced.

Description

Technical Field

[0001] The utility model relates to the relevant field of microwave sensors, in particular to a microwave sensor. Background Art

[0002] The microwaves emitted by the transmitting antenna of the microwave sensor will be absorbed or reflected when encountering the object to be measured, causing the power to change. If the microwaves passing through the object to be measured or reflected by the object to be measured are received by the receiving antenna and converted into electrical signals, which are then processed by the measuring circuit, microwave detection is achieved. The microwave sensor is mainly composed of a microwave oscillator and a microwave antenna. The microwave oscillator is a device that generates microwaves.

[0003] After searching, the Chinese utility model patent CN110286367B has a shell with a rectangular shape, in which a sensor body is installed; the sensor body includes a circuit board, a power supply circuit is provided on the circuit board, and a microwave transmitting and receiving module, a potentiometer, an electrolytic capacitor, a relay, an operational amplifier chip, a voltage stabilizer and a single-chip microcomputer chip are also provided on the circuit board; by optimizing and integrating the circuit of the circuit board into the single-chip microcomputer chip, the components on the circuit board are reduced through the control integration of the single-chip microcomputer chip to reduce the volume of the sensor body; the present invention optimizes the integrated circuit by adopting a single-chip microcomputer chip, effectively reducing the number of components on the circuit board, thereby effectively reducing the volume of the sensor; the purpose of the present invention is to provide a smaller miniaturized microwave sensor.

[0004] The existing devices may encounter the following problems when in use: a shielding shell is usually required to be encapsulated on the outside of the sensor to avoid signal interference. However, the shielding shell has limited protection, and the installation of a protective shell reduces the signal receiving and sending effect, resulting in unsatisfactory sensor performance. Utility Model Content

[0005] The purpose of the utility model is to provide a microwave sensor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a microwave sensor, comprising a shell notch and a rubber protective sleeve, a notch is opened on the top of the shell, a rubber protective sleeve is arranged inside the notch, a movable plate is bonded to the bottom of the rubber protective sleeve, a shielding shell is arranged inside the movable plate, a holder is connected to one side of the shielding shell, a sensor body is clamped inside the holder, the sensor body is inserted into the holder inside the shielding shell, the sensor body is limited and fixed, and subsequent liquid injection work is convenient, the shielding shell bolts are installed on the movable plate, a radio frequency transceiver board is arranged on the sensor body, a telescopic spring is fixed at the bottom of the movable plate, and the bottom end of the telescopic spring is fixedly connected to a mounting plate, when the shielding shell is subjected to pressure, under the action of the telescopic spring, the shielding shell retracts into the shell, and the shell provides a clearance space for the shielding shell to reduce damage to the sensor body during use.

[0007] In a further embodiment, a connecting block is provided inside the shell, a threaded hole is opened inside the connecting block, a base plate is provided at the bottom of the shell, the base plate is threadedly connected to the threaded hole by bolts, and the base plate is installed and connected to the shell by bolts.

[0008] In a further embodiment, slide grooves are provided on both sides of the shell, slide rails are provided inside the slide grooves, sliders are provided on both sides of the movable plate, the slide rails are slidably connected to the sliders, and the sliders move linearly on the slide rails, thereby avoiding uneven force causing the internal movable plate to move out of position.

[0009] In a further embodiment, an injection hole is opened on the movable plate, one end of the injection hole is connected to a shielding shell, the material of the shielding shell is set to aluminum alloy, and epoxy resin liquid is poured into the interior of the shielding shell through the injection hole, so that the epoxy resin liquid fills the shielding shell.

[0010] In a further embodiment, a telescopic rod is provided inside the telescopic spring, and the telescopic rod is located between the moving plate and the mounting plate, and the telescopic rod improves the use effect of the telescopic spring.

[0011] In a further embodiment, a mounting plate is connected to the interior of the shell, the mounting plate is arranged in a ring shape, and the mounting plate cooperates with a telescopic spring so that the shielding shell can be retracted.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The inside of the slot is filled with a rubber protective sleeve to reduce the entry of dust and impurities. When the shielding shell is retracted, liquid and impurities are prevented from entering the shell, thereby protecting the sensor body.

[0014] Under the action of the telescopic spring, when the shielding shell is under pressure, it retracts into the inside of the shell, and the shell provides space for the shielding shell, thereby reducing damage to the sensor body during use and preventing the shell from always wrapping the RF transceiver board, affecting the normal use of the RF transceiver board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the shielding shell structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the card holder structure of the utility model.

[0019] In the figure: 1. rubber protective cover; 2. shielding shell; 3. RF transceiver board; 4. sensor body; 5. card holder; 6. shell; 7. moving plate; 8. injection hole; 9. telescopic spring; 10. mounting plate; 11. bottom plate; 12. bolt; 13. slider; 14. slide rail; 15. slide groove; 16. notch. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-2The utility model provides an embodiment: a microwave sensor, including a shell 6 notch 16, a rubber protective sleeve 1, the top of the shell 6 is provided with a notch 16, the inside of the notch 16 is provided with a rubber protective sleeve 1, the bottom of the rubber protective sleeve 1 is bonded with a moving plate 7, the rubber protective sleeve 1 fills the inside of the notch 16 to reduce the entry of dust and impurities, the bottom of the moving plate 7 is fixed with a telescopic spring 9, the bottom end of the telescopic spring 9 is fixedly connected with a mounting plate 10, the two sides of the shell 6 are provided with a slide groove 15, the inside of the slide groove 15 is provided with a slide rail 14, the two sides of the moving plate 7 A slider 13 is provided, and the slider 13 is slidably connected to the slide rail 14. A telescopic rod is provided inside the telescopic spring 9, and the telescopic rod is located between the movable plate 7 and the mounting plate 10. The mounting plate 10 is connected to the inside of the shell 6, and the mounting plate 10 is arranged in a ring shape. When the shielding shell 2 is subjected to pressure, the movable plate 7 drives the slider 13 to move on the slide rail 14, so that the shielding shell 2 retracts into the inside of the shell 6. The shell 6 provides a clearance space for the shielding shell 2 to prevent the sensor body 4 from being squeezed and damaged. The telescopic spring 9 prevents the shell 6 from always wrapping the RF transceiver board 3, which affects the normal use of the RF transceiver board 3.

[0022] See also Figure 1-4 A shielding shell 2 is arranged inside the movable plate 7, a holder 5 is connected to one side of the shielding shell 2, a sensor body 4 is clamped inside the holder 5, a radio frequency transceiver board 3 is arranged on the sensor body 4, an injection hole 8 is opened on the movable plate 7, the sensor body 4 is inserted into the holder 5 inside the shielding shell 2, the sensor body 4 is limited and fixed, the shielding shell 2 is bolted to the movable plate 7, epoxy resin liquid is poured into the inside of the shielding shell 2 through the injection hole 8, so that the epoxy resin liquid fills the shielding shell 2, and the protection of the sensor body 4 and the radio frequency transceiver board 3 is improved, one end of the injection hole 8 is connected to the shielding shell 2, the material of the shielding shell 2 is set to aluminum alloy, the shielding shell 2 reduces environmental interference, and improves the use effect of the radio frequency transceiver board 3.

[0023] See also Figure 1-2 A connecting block is provided inside the shell 6, and a threaded hole is opened inside the connecting block. A bottom plate 11 is provided at the bottom of the shell 6. The bottom plate 11 is threadedly connected with the threaded hole by bolts 12, and the bottom plate 11 closes the shell 6.

[0024] Working principle: insert the sensor body 4 into the holder 5 inside the shielding shell 2, limit and fix the sensor body 4, install the shielding shell 2 on the movable plate 7 with bolts, and pour epoxy resin liquid into the inside of the shielding shell 2 through the injection hole 8, so that the epoxy resin liquid fills the shielding shell 2, and fills the inside of the groove 16 through the rubber protective sleeve 1 to reduce the entry of dust and impurities. When the shielding shell 2 is subjected to pressure, the movable plate 7 drives the slider 13 to move on the slide rail 14, so that the shielding shell 2 retracts into the inside of the shell 6. The shell 6 provides a clearance space for the shielding shell 2 to prevent the sensor body 4 from being squeezed and damaged. The telescopic spring 9 prevents the shell 6 from always wrapping the RF transceiver board 3, which affects the normal use of the RF transceiver board 3.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A microwave sensor, comprising a housing (6), a notch (16), and a rubber protective sleeve (1), characterized in that: The top of the shell (6) is provided with a notch (16), a rubber protective sleeve (1) is arranged inside the notch (16), a movable plate (7) is bonded to the bottom of the rubber protective sleeve (1), a shielding shell (2) is arranged inside the movable plate (7), a holder (5) is connected to one side of the shielding shell (2), a sensor body (4) is clamped inside the holder (5), a radio frequency transceiver board (3) is arranged on the sensor body (4), a telescopic spring (9) is fixed to the bottom of the movable plate (7), and a mounting plate (10) is fixedly connected to the bottom end of the telescopic spring (9).

2. A microwave sensor according to claim 1, characterized in that: A connection block is provided inside the housing (6), a threaded hole is provided inside the connection block, a bottom plate (11) is provided at the bottom of the housing (6), and the bottom plate (11) is threadedly connected to the threaded hole via bolts (12).

3. A microwave sensor according to claim 1, characterized in that: Slide grooves (15) are provided on both sides of the housing (6), and slide rails (14) are provided inside the slide grooves (15). Slide blocks (13) are provided on both sides of the movable plate (7), and the slide rails (14) are slidably connected to the slide blocks (13).

4. A microwave sensor according to claim 1, characterized in that: The movable plate (7) is provided with a liquid injection hole (8), one end of the liquid injection hole (8) is connected to a shielding shell (2), and the material of the shielding shell (2) is set to be an aluminum alloy.

5. A microwave sensor according to claim 1, characterized in that: A telescopic rod is arranged inside the telescopic spring (9), and the telescopic rod is located between the moving plate (7) and the mounting plate (10).

6. A microwave sensor according to claim 1, characterized in that: A mounting plate (10) is connected to the interior of the housing (6), and the mounting plate (10) is arranged in a ring shape.

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