Microwave sensor

Abstract

The utility model provides a microwave sensor, comprising a sensor housing, the sensor housing comprises a trapezoid housing, a first transverse plate and a second transverse plate, the first transverse plate and the second transverse plate are fixed at two ends of the trapezoid housing along the width direction of the trapezoid housing, two ends of the trapezoid housing along the length direction of the trapezoid housing are respectively provided with a pair of plug connectors, the first transverse plate is provided with a first through hole, and the second transverse plate is provided with a second through hole; two second through holes are formed in the second transverse plate; the top end of the circuit board is fixedly connected with the bottom ends of the first transverse plate and the second transverse plate, a battery block, a microwave emitter, a microwave receiver, a display screen, a first prompting lamp, a second prompting lamp and a control chip are arranged at the top end of the circuit board, and third through holes are formed in the positions, corresponding to the plug connectors, of the circuit board; the first prompting lamp and the second prompting lamp correspond to the two second through holes in position, and the display screen corresponds to the first through hole in position. The beneficial effects of the utility model are that the installation offset error can be eliminated, the man-machine interaction is increased, and the plug-in type rapid deployment is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of microwave sensing and measurement, and more specifically, to a microwave sensor. Background Technology

[0002] Microwave sensors are electronic devices that use the characteristics of microwaves to detect physical quantities such as the presence, speed, distance, and angle of objects. They are mainly used in traffic speed measurement, industrial control, security monitoring, and smart device interaction. Their operating frequency band covers 5.8GHz to 77GHz, and they can achieve functions such as penetrating obstacles and resisting environmental interference through non-contact detection.

[0003] Microwave sensors face structural bottlenecks in applications such as object detection and distance measurement:

[0004] 1. Insufficient structural reliability: Traditional sensor housings often adopt a rectangular splicing design and are separately fixed to the circuit board using screws. Under vibration, relative displacement is prone to occur, causing the position of the signal transmitter and sensor to shift, resulting in detection blind spots and inaccurate measurement accuracy.

[0005] 2. Modular installation is inefficient: On-site installation relies on multiple bolts for adjustment and positioning. Accumulated tolerances cause the microwave emission direction to deviate from the preset angle, requiring repeated calibration and consuming a lot of time.

[0006] 3. Conflict between human-computer interaction and reliability: The fault / power status relies on an external buzzer alarm, which makes it impossible to intuitively distinguish the fault type, increases the time spent on troubleshooting, and the circuit board is directly exposed to the outside of the casing without a buffer design, making the high-frequency microwave chip easily damaged by transportation shocks.

[0007] Existing technologies attempt to improve installation accuracy by adding positioning posts, but this does not solve the problem of stress concentration on the circuit board caused by the deformation of the rectangular splicing shell. Therefore, there is an urgent need for a microwave sensor that can eliminate installation offset errors, increase human-machine interaction, and enable plug-in rapid deployment. Utility Model Content

[0008] The technical problem to be solved by this utility model is how to eliminate installation offset errors, increase human-computer interaction, and enable plug-in rapid deployment. In order to overcome the defects of the above-mentioned prior art (or related technologies), this utility model provides a microwave sensor.

[0009] This utility model provides a microwave sensor, comprising:

[0010] A sensor housing includes a trapezoidal housing, a first horizontal plate and a second horizontal plate. The first horizontal plate and the second horizontal plate are fixed to both ends of the trapezoidal housing along its width direction. A pair of plug-in parts are respectively provided at both ends of the trapezoidal housing along its length direction. A first through hole is provided on the first horizontal plate and two second through holes are provided on the second horizontal plate.

[0011] A circuit board, the top of which is fixedly connected to the bottom of the first horizontal plate and the second horizontal plate. The top of the circuit board is provided with a battery block, at least one microwave transmitter, at least one microwave receiver, a display screen, a first indicator light for indicating faults, a second indicator light for indicating battery level, and a control chip. The battery block, the microwave transmitter, the microwave receiver, the display screen, the first indicator light, and the second indicator light are all electrically connected to the control chip. The circuit board has third through holes corresponding to the positions of each of the connectors for each connector to pass through and be plugged into and fixed with external devices. The positions of the first indicator light and the second indicator light correspond to the two second through holes so that the first indicator light and the second indicator light are exposed. The position of the display screen corresponds to the first through hole so that the display screen is exposed.

[0012] Compared with the prior art, the microwave sensor proposed in this application has the following advantages:

[0013] This application integrates the battery pack, microwave transmitter, microwave receiver, display screen, first indicator light, second indicator light, and control chip onto a single circuit board, reducing internal wiring, improving signal integrity, and reducing the impact of electromagnetic interference on microwave signals. A rigid support frame is formed by a trapezoidal housing and double horizontal plates to resist installation stress. The design of the connectors and the third through hole enables rapid modular installation and avoids positioning deviations caused by bolt fixing. The display screen is exposed through the first through hole, allowing direct visualization of data. Independent indicator lights for faults and battery levels can be set to achieve color-coded status warnings. The circuit board is directly fixed to the sensor housing, reducing the risk of component desoldering due to vibration.

[0014] In one possible implementation, the circuit board has a support base at its top, the support base has a fixing member at its top, the fixing member has a bolt hole corresponding to a hexagonal head bolt at its top, the trapezoidal housing has a fourth through hole at its top, and the fourth through hole and the fixing member are positioned to expose the fixing member. The sensor housing and the circuit board are fixed by screwing the hexagonal head bolt into the bolt hole.

[0015] Compared with existing technologies, the above technical solution can provide high-strength mechanical locking through the design of hexagonal head bolts and bolt holes, preventing the sensor housing from separating from the circuit board due to long-term vibration. The sensor housing can be further tightened through the through hole at the top of the trapezoidal housing without disassembling the sensor housing, simplifying maintenance.

[0016] In one possible implementation, the bottom of the circuit board is provided with multiple cushioning pads.

[0017] Compared with existing technologies, the above technical solution can absorb external impacts through the buffer pad and protect the microwave components on the circuit board.

[0018] In one possible implementation, the outer surface of the sensor housing is coated with a nano-hydrophobic coating.

[0019] Compared with existing technologies, the above technical solution can prevent moisture from seeping into the sensor housing in humid environments, thus avoiding short circuits.

[0020] In one possible implementation, a glass sheet is provided at the first through-hole and the glass sheet is located above the display screen.

[0021] Compared with existing technologies, the above technical solution can prevent foreign objects from scratching the display screen and maintain visual clarity.

[0022] In one possible implementation, the sensor housing is made of plastic.

[0023] Compared with existing technologies, the above technical solution can reduce mass production costs while ensuring a certain level of robustness.

[0024] In one possible implementation, a thermally conductive silicone pad is laid between the circuit board and the first horizontal plate and the second horizontal plate, respectively.

[0025] Compared with existing technologies, the above technical solution can eliminate the air layer between the circuit board and the sensor housing, improve heat conduction efficiency, and avoid local overheating.

[0026] In one possible implementation, a sealing ring is provided at the bottom outer edge of the first through hole and each of the second through holes.

[0027] Compared with existing technologies, the above technical solution can form a physical seal at the through-hole interface. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the connection principle of the control chip of this utility model;

[0031] Figure 4 This is a bottom view of the structure of this utility model;

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Sensor housing; 2. Trapezoidal housing; 3. First horizontal plate; 4. Second horizontal plate; 5. Connector; 6. First through hole; 7. Second through hole; 8. Circuit board; 9. Battery block; 10. Microwave transmitter; 11. Microwave receiver; 12. Display screen; 13. First indicator light; 14. Second indicator light; 15. Control chip; 16. Third through hole; 17. Support base; 18. Fixing component; 19. Bolt hole; 20. Fourth through hole; 21. Buffer pad. Detailed Implementation

[0034] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0035] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1-3 This application discloses a microwave sensor, mainly comprising a sensor housing 1 and a circuit board 8 fixedly connected. The sensor housing 1 includes a trapezoidal housing 2, a first horizontal plate 3, and a second horizontal plate 4. The first horizontal plate 3 and the second horizontal plate 4 are fixed to both ends of the trapezoidal housing 2 along its width direction. A pair of connectors 5 are respectively provided at both ends of the trapezoidal housing 2 along its length direction. A first through hole 6 is provided on the first horizontal plate 3, and two second through holes 7 are provided on the second horizontal plate 4. The top end of the circuit board 8 is fixedly connected to the bottom end of the first horizontal plate 3 and the second horizontal plate 4. The top end of the circuit board 8 is provided with a battery block 9, at least one microwave transmitter 10, and at least one microwave receiver 11. The circuit board 8 includes a display screen 12, a first indicator light 13 for indicating faults, a second indicator light 14 for indicating battery level, and a control chip 15. The battery block 9, microwave transmitter 10, microwave receiver 11, display screen 12, first indicator light 13, and second indicator light 14 are all electrically connected to the control chip 15. A third through hole 16 is provided on the circuit board 8 corresponding to the position of each connector 5, allowing each connector 5 to pass through and be plugged into and fixed with external devices. The positions of the first indicator light 13 and the second indicator light 14 correspond to the two second through holes 7, allowing the first indicator light 13 and the second indicator light 14 to be exposed. The position of the display screen 12 corresponds to the first through hole 6, allowing the display screen 12 to be exposed.

[0037] In this embodiment, a microwave transmitter 10 emits a microwave signal, which is reflected upon encountering an object. The reflected signal is received by a microwave receiver 11 and transmitted to a control chip 15 for analysis to obtain measurement data. The control chip 15 includes a power detection module and an alarm analysis module. The power detection module detects the remaining power of the battery pack 9 in real time and triggers the second indicator light 14 to light up and controls the display screen 12 to display power alarm information when the remaining power is lower than a preset threshold. The alarm analysis module detects the emission of the microwave signal and the reception of the reflected signal in real time. When the signal is lost, it triggers the first indicator light 13 to light up and controls the display screen 12 to display fault alarm information.

[0038] In this embodiment, the number of microwave transmitters 10 can be set to two, with one microwave transmitter 10 serving as the master transmitter and the other microwave transmitter 10 serving as the slave transmitter. In the event of a fault, the master transmitter and the slave transmitter can be switched to ensure the smooth transmission of microwave signals. The number of microwave receivers 11 can also be set to two, with one microwave receiver 11 serving as the master receiver and the other microwave receiver 11 serving as the slave receiver. In the event of a fault, the master receiver and the slave receiver can be switched to ensure the smooth reception of reflected signals.

[0039] In this embodiment, the trapezoidal shell 2 adopts a trapezoidal cross-section design with an inclination angle of 15°-30° on both sides, which reduces wind resistance interference while enhancing the compressive strength of the trapezoidal shell 2. The value of this inclination angle can be adjusted according to the actual situation.

[0040] In this embodiment, the connector 5 can be a tapered copper pillar that fits with the third through hole 16 of the circuit board 8 with a clearance. During installation, it can be directly inserted into the external device guide rail slot to avoid microwave emission angle deviation.

[0041] In this embodiment, the top of the circuit board 8 is provided with a support base 17, the top of the support base 17 is provided with a fixing member 18, the top of the fixing member 18 is provided with a bolt hole 19 corresponding to a hexagonal head bolt, the top of the trapezoidal housing 2 is provided with a fourth through hole 20, and the position of the fourth through hole 20 and the fixing member 18 are corresponding to allow the fixing member 18 to be exposed. The sensor housing 1 and the circuit board 8 are fixed by screwing the hexagonal head bolt into the bolt hole 19.

[0042] See Figure 4 The bottom of the circuit board 8 is provided with multiple buffer pads 21, which absorb external impacts and protect the microwave components on the circuit board 8.

[0043] In this embodiment, the outer surface of the sensor housing 1 is coated with a nano-hydrophobic coating, which gives it hydrophobic / hydrophobic properties, promotes the rapid rolling off of water droplets, reduces the adhesion of rainwater and fog, reduces signal attenuation and the risk of false alarms, and has a certain anti-fouling effect.

[0044] In this embodiment, a glass sheet is provided at the first through hole 6 and the glass sheet is located above the display screen 12. Due to the transparency of the glass sheet, light from the display screen 12 is allowed to pass through, providing a visual indication of the working status of the microwave sensor (such as power, alarm, fault), which facilitates installation, debugging and status monitoring.

[0045] In this embodiment, the sensor housing 1 is made of plastic, which reduces mass production costs while ensuring a certain level of robustness.

[0046] In this embodiment, thermally conductive silicone pads are laid between the circuit board and the first horizontal plate 3 and the second horizontal plate 4, respectively, to efficiently conduct the heat generated by the heat-generating components on the circuit board 8 to the sensor housing 1 or the outside for heat dissipation. This can effectively reduce the internal operating temperature, prevent performance drift, accelerated aging of components, or even failure caused by high temperature, and improve long-term reliability and stability, which is especially important for microwave sensors used in high-power or high-temperature environments.

[0047] In this embodiment of the application, a sealing ring is provided on the outer edge of the bottom end of the first through hole 6 and each of the second through holes 7. The sealing ring can be an O-ring made of silicone, fluororubber, EPDM or other materials, or a gasket made of rubber, silicone, foam material or other materials, or a potting compound made of epoxy resin, polyurethane, silicone or other materials, as long as it can achieve a physical sealing effect.

[0048] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A microwave sensor, characterized in that, include: A sensor housing includes a trapezoidal housing, a first horizontal plate and a second horizontal plate. The first horizontal plate and the second horizontal plate are fixed to both ends of the trapezoidal housing along its width direction. A pair of plug-in parts are respectively provided at both ends of the trapezoidal housing along its length direction. A first through hole is provided on the first horizontal plate and two second through holes are provided on the second horizontal plate. A circuit board, the top of which is fixedly connected to the bottom of the first horizontal plate and the second horizontal plate. The top of the circuit board is provided with a battery block, at least one microwave transmitter, at least one microwave receiver, a display screen, a first indicator light for indicating faults, a second indicator light for indicating battery level, and a control chip. The battery block, the microwave transmitter, the microwave receiver, the display screen, the first indicator light, and the second indicator light are all electrically connected to the control chip. The circuit board has third through holes corresponding to the positions of each of the connectors for each connector to pass through and be plugged into and fixed with external devices. The positions of the first indicator light and the second indicator light correspond to the two second through holes so that the first indicator light and the second indicator light are exposed. The position of the display screen corresponds to the first through hole so that the display screen is exposed.

2. The microwave sensor according to claim 1, characterized in that, The circuit board has a support base at its top, and a fixing member at its top. The fixing member has a bolt hole at its top corresponding to a hexagonal head bolt. The trapezoidal housing has a fourth through hole at its top, and the fourth through hole corresponds to the position of the fixing member so that the fixing member is exposed. The sensor housing and the circuit board are fixed by screwing the hexagonal head bolt into the bolt hole.

3. The microwave sensor according to claim 1, characterized in that, The bottom of the circuit board is provided with multiple buffer pads.

4. The microwave sensor according to claim 1, characterized in that, The outer surface of the sensor housing is coated with a nano-hydrophobic coating.

5. The microwave sensor according to claim 1, characterized in that, A glass sheet is provided at the first through hole and the glass sheet is located above the display screen.

6. The microwave sensor according to claim 1, characterized in that, The sensor housing is made of plastic.

7. The microwave sensor according to claim 1, characterized in that, A thermally conductive silicone pad is laid between the circuit board and the first horizontal plate and the second horizontal plate, respectively.

8. The microwave sensor according to claim 1, characterized in that, A sealing ring is provided at the bottom outer edge of the first through hole and each of the second through holes.

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