CN221077836U - Micro patch type pyroelectric infrared sensor - Google Patents
Micro patch type pyroelectric infrared sensor Download PDFInfo
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- CN221077836U CN221077836U CN202322812065.3U CN202322812065U CN221077836U CN 221077836 U CN221077836 U CN 221077836U CN 202322812065 U CN202322812065 U CN 202322812065U CN 221077836 U CN221077836 U CN 221077836U
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Abstract
The utility model discloses a micro patch type pyroelectric infrared sensor, which comprises a ceramic hollow base, wherein a ceramic base is fixed at the bottom end of the ceramic hollow base, a signal processing PCB (printed Circuit Board) is arranged at the bottom of the ceramic hollow base, a double-layer type supporting retainer is arranged at the bottom of the ceramic hollow base at one side of the signal processing PCB, and an infrared sensitive element is bonded at the top end of the double-layer type supporting retainer; and the cover plate is packaged at the top end of the ceramic hollow base, and an optical filter is arranged at the central position inside the cover plate. The utility model ensures that the double-layer support retainer and the ceramic hollow base have larger installation area and can provide more stable supporting force for the infrared sensitive element, thereby effectively reducing the loosening or fracture risk between the support component and the infrared sensitive element and enhancing the structural stability of the sensor.
Description
Technical Field
The utility model relates to the technical field of infrared sensors, in particular to a micro patch type pyroelectric infrared sensor.
Background
The patch type pyroelectric infrared sensor is a sensor for detecting and sensing infrared radiation, and structurally comprises an infrared sensitive element, a lens system, a signal processing circuit and an output interface. The patch type pyroelectric infrared sensor has the function principle based on the pyroelectric effect, converts the micro temperature change caused by sensing infrared radiation into an electric signal, outputs a readable temperature value or an infrared image after signal processing, and comprises a shell with a closed structure, a pipe cap and a substrate, wherein an infrared optical filter on the upper surface of the pipe cap is an infrared-transmitting window, and a certain accommodating space is formed between the pipe cap and the substrate. The infrared sensitive element is fixed by the supporting component, and the supporting component and the signal processing circuit are directly fixed on the substrate. The signal processing circuit is a junction field effect tube/operational amplifier and the like, a lighter metallized ceramic substrate and an epoxy resin PCB board are adopted, heavier pins are removed, the chip type packaging is convenient to process, the yield is higher, but the supporting component in the technical scheme is a rectangular supporting block, the structure is simpler, the supporting area of the supporting component on the pipe cap is lower, the supporting strength of the infrared sensitive element is not high, the connecting area is lower, the contact area between the supporting component and the infrared sensitive element is limited, the stability and strength of the supporting component are insufficient, loosening or breakage is easy to occur, the performance and the service life of the sensor are influenced, meanwhile, the supporting component is weak in resistance to external vibration and impact due to the small connecting area, and can be easily damaged in a vibration or impact environment, so that the stability and the accuracy of the sensor are influenced.
Disclosure of utility model
The utility model aims to provide a micro patch type pyroelectric infrared sensor, which improves the installation area of a supporting part and ensures the supporting strength of the supporting part on an infrared sensitive element so as to solve the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a micro-patch type pyroelectric infrared sensor comprising:
The device comprises a ceramic hollow base, wherein a ceramic base is fixed at the bottom end of the ceramic hollow base, a signal processing PCB (printed circuit board) is installed at the bottom of the ceramic hollow base, a double-layer type supporting retainer is installed at the bottom of the ceramic hollow base at one side of the signal processing PCB, and an infrared sensitive element is adhered to the top end of the double-layer type supporting retainer;
The cover plate is packaged at the top end of the ceramic hollow base, an optical filter is arranged at the central position inside the cover plate, the output end of the infrared sensing element is electrically connected with the input end of the signal processing PCB, and pins electrically connected with the signal processing PCB are arranged at the bottom end of the ceramic base.
Preferably, the bottom of the ceramic hollow base is provided with a lower groove for embedding the signal processing PCB.
Preferably, the gold wire for the signal processing PCB is fixed in the lower groove at the bottom of the ceramic hollow base through an automatic bonding machine, and insulating glue is coated between the lower surface of the signal processing PCB and the lower groove.
Preferably, a through hole is formed in the center of the top end of the cover plate, and insulating glue is arranged at the joint of the through hole and the optical filter.
Preferably, the double-layer support retainer comprises a square support frame adhered to the bottom of the ceramic hollow base, an upper lip and a lower lip which are integrally formed at two ends of the surface of the square support frame, the lower surface of the lower lip and the bottom of the ceramic hollow base are adhered to each other, supporting plates are fixed at two sides of the top end of the square support frame, and the infrared sensitive elements are adhered to the top ends of the two supporting plates.
Preferably, two right-angle seats are arranged on the outer walls of the two sides of the lower lip, and the right-angle seats and the inner wall of the ceramic hollow base are mutually bolted.
Compared with the prior art, the utility model has the beneficial effects that: this miniature patch formula pyroelectric infrared sensor is through being provided with the structure that ceramic cavity base and bilayer support keep ware etc. mutually supported, infrared sensing element installs on the top of bilayer support keep ware, have bigger installation area between bilayer support keep ware and the ceramic cavity base, can provide more stable holding power to infrared sensing element, thereby effectively reduce the not hard up or the fracture risk between supporting part and the infrared sensing element, strengthen sensor's structural stability, simultaneously owing to have bigger connecting area between bilayer support keep ware and the infrared sensing element, its resistance to external vibration and impact is also stronger, help reducing the damage risk of sensor in vibration or impact environment, improve sensor's reliability and durability.
Drawings
FIG. 1 is a schematic diagram of a front view of the present utility model;
FIG. 2 is a schematic perspective view of the present utility model;
FIG. 3 is a schematic perspective view of the explosive state of the present utility model;
FIG. 4 is a schematic perspective view of a dual-layer support retainer of the present utility model;
In the figure: 1. a ceramic hollow base; 2. signal processing a PCB; 3. a double-layered support holder; 301. a loop-shaped supporting frame; 302. a lower lip; 303. a supporting plate; 304. a right-angle seat; 305. an upper lip; 4. an infrared sensitive element; 5. a cover plate; 501. a through hole; 6. a light filter; 7. and a ceramic base.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-4, an embodiment of the present utility model is provided: the utility model provides a miniature patch type pyroelectric infrared sensor, including ceramic cavity base 1, the bottom mounting of ceramic cavity base 1 has ceramic base 7, signal processing PCB board 2 is installed to the bottom of ceramic cavity base 1, the bottom of ceramic cavity base 1 is provided with the lower pocket that supplies signal processing PCB board 2 to imbed, signal processing PCB board 2 is fixed in the lower pocket of ceramic cavity base 1 bottom through automatic bonding machine with the gold thread, the lower surface of signal processing PCB board 2 and lower pocket between scribble the insulating glue, signal processing PCB board 2 is fixed in the corresponding recess in customized ceramic cavity base 1 bottom through automatic bonding machine with the gold thread, the insulating glue is put and toasted with the oven, make insulating dry, ceramic cavity base 1, ceramic base 7 play fixed and insulating effect this moment;
The bottom of the ceramic hollow base 1 at one side of the signal processing PCB 2 is provided with a double-layer supporting retainer 3, and the top end of the double-layer supporting retainer 3 is adhered with an infrared sensitive element 4;
The cover plate 5 is packaged at the top end of the ceramic hollow base 1, the optical filter 6 is arranged at the central position inside the cover plate 5, the ceramic hollow base 1 and the ceramic base 7 are heat insulation insulators, and have low heat conductivity, so that heat conduction inside and outside the sensor can be effectively isolated, interference of external temperature on measurement of the sensor can be reduced, and measurement accuracy and stability are improved;
The double-layer support retainer 3 and the ceramic hollow base 1 have larger installation area, and can provide more stable support force for the infrared sensitive element 4, thereby effectively reducing the loosening or fracture risk between the support component and the infrared sensitive element;
The output end of the infrared sensitive element 4 is electrically connected with the input end of the signal processing PCB 2, and pins electrically connected with the signal processing PCB 2 are arranged at the bottom end of the ceramic base 7;
A through hole 501 is formed in the center of the top end of the cover plate 5, insulating glue is arranged at the joint of the through hole 501 and the optical filter 6, and the optical filter 6 is used for focusing infrared radiation so as to enhance the sensing capability of the sensor on a remote target; packaging the cover plate 5 with the optical filter 6 and the ceramic hollow base 1 by using a parallel sealing machine;
The double-layer type support retainer 3 comprises a square support frame 301 adhered to the bottom of the ceramic hollow base 1, and an upper lip 305 and a lower lip 302 which are integrally formed at two ends of the surface of the square support frame 301, wherein the lower surface of the lower lip 302 is adhered to the bottom of the ceramic hollow base 1, the bottom end of the square support frame 301 is fixed to the bottom of the ceramic hollow base 1 through conductive adhesive, the lower lip 302 can improve the adhesion area between the square support frame 301 and the bottom of the ceramic hollow base 1, and the side edges of the lower lip 302 and the upper lip 305 are adhered to the inner wall of the ceramic hollow base 1, so that the square support frame 301 has a larger installation area, and a more stable supporting force can be provided for the infrared sensitive element 4;
The two sides of the top end of the square support frame 301 are both fixed with the supporting plates 303, the infrared sensitive element 4 is adhered to the top ends of the two supporting plates 303, the top end of the square support frame 301 is fixed with the two supporting plates 303, the bottom end of the infrared sensitive element 4 is adhered to the two supporting plates 303, and the structural stability, the vibration resistance and the impact resistance of the infrared sensitive element 4 are improved by utilizing the supporting plates 303;
Two right-angle seats 304 are mounted on the outer walls of the two sides of the lower lip 302, the right-angle seats 304 and the inner wall of the ceramic hollow base 1 are mutually bolted, and the outer walls of the two sides of the rectangular support frame 301 can be further bolted through the right-angle seats 304 and the inner wall of the ceramic hollow base 1.
When the patch type pyroelectric infrared sensor is used, firstly, the shell structure is formed by the ceramic base 7, the ceramic hollow base 1 and the cover plate 5, the infrared sensitive element 4 is arranged at the top end of the double-layer type supporting retainer 3, the infrared sensitive element 4 can sense infrared radiation and convert the infrared radiation into an electric signal, the electric signal is sent into the signal processing PCB 2, the signal processing PCB 2 is used for amplifying, filtering and processing the electric signal received from the infrared sensitive element 4, pins at the bottom end of the ceramic base 7 convert the electric signal processed by the signal processing PCB 2 into readable temperature values or infrared images and send the temperature values or the infrared images into a load connected with the sensor, the infrared sensitive element 4 in the patch type pyroelectric infrared sensor is fixedly adhered and supported by the double-layer type supporting retainer 3, a larger installation area is arranged between the double-layer type supporting retainer 3 and the ceramic hollow base 1, and more stable supporting force can be provided for the infrared sensitive element 4, therefore loosening or fracture risks between a supporting part and the infrared sensitive element are effectively reduced, the structural stability of the sensor is enhanced, and meanwhile, the vibration and impact resistance of the sensor in the environment are also improved due to the fact that the connection area between the double-layer type supporting retainer 3 and the infrared sensitive element 4 is more resistant to the vibration and the impact resistance of the sensor is more resistant to the environment.
Claims (6)
1. A micro-patch type pyroelectric infrared sensor, comprising:
The device comprises a ceramic hollow base (1), wherein a ceramic base (7) is fixed at the bottom end of the ceramic hollow base (1), a signal processing PCB (printed circuit board) (2) is installed at the bottom of the ceramic hollow base (1), a double-layer type supporting retainer (3) is installed at the bottom of the ceramic hollow base (1) at one side of the signal processing PCB (2), and an infrared sensitive element (4) is adhered to the top end of the double-layer type supporting retainer (3);
The cover plate (5), the top at ceramic cavity base (1) is packaged to cover plate (5), light filter (6) are installed to the inside central point department of cover plate (5), the output and the input electric connection of signal processing PCB board (2) of infrared sensing element (4), the stitch with signal processing PCB board (2) electric connection is installed to the bottom of ceramic base (7).
2. The micro-patch pyroelectric infrared sensor as recited in claim 1, wherein: the bottom of the ceramic hollow base (1) is provided with a lower groove for embedding the signal processing PCB (2).
3. The micro-patch pyroelectric infrared sensor as recited in claim 1, wherein: the signal processing PCB (2) is fixed in a lower groove at the bottom of the ceramic hollow base (1) through an automatic bonding machine by using gold wires, and insulating glue is coated between the lower surface of the signal processing PCB (2) and the lower groove.
4. The micro-patch pyroelectric infrared sensor as recited in claim 1, wherein: a through hole (501) is formed in the center of the top end of the cover plate (5), and insulating glue is arranged at the joint of the through hole (501) and the optical filter (6).
5. The micro-patch pyroelectric infrared sensor as recited in claim 1, wherein: the double-layer support retainer (3) comprises a square support frame (301) adhered to the bottom of the ceramic hollow base (1), an upper lip (305) and a lower lip (302) which are integrally formed at two ends of the surface of the square support frame (301), the lower surface of the lower lip (302) and the bottom of the ceramic hollow base (1) are adhered to each other, supporting plates (303) are fixed to two sides of the top end of the square support frame (301), and the infrared sensitive elements (4) are adhered to the top ends of the two supporting plates (303).
6. The micro-patch pyroelectric infrared sensor as recited in claim 5, wherein: two right-angle seats (304) are arranged on the outer walls of two sides of the lower lip (302), and the right-angle seats (304) and the inner wall of the ceramic hollow base (1) are mutually bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322812065.3U CN221077836U (en) | 2023-10-19 | 2023-10-19 | Micro patch type pyroelectric infrared sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322812065.3U CN221077836U (en) | 2023-10-19 | 2023-10-19 | Micro patch type pyroelectric infrared sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221077836U true CN221077836U (en) | 2024-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322812065.3U Active CN221077836U (en) | 2023-10-19 | 2023-10-19 | Micro patch type pyroelectric infrared sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221077836U (en) |
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2023
- 2023-10-19 CN CN202322812065.3U patent/CN221077836U/en active Active
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