CN214667294U - Integrated Fresnel lens pyroelectric sensor - Google Patents
Integrated Fresnel lens pyroelectric sensor Download PDFInfo
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- CN214667294U CN214667294U CN202120777573.0U CN202120777573U CN214667294U CN 214667294 U CN214667294 U CN 214667294U CN 202120777573 U CN202120777573 U CN 202120777573U CN 214667294 U CN214667294 U CN 214667294U
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Abstract
The utility model relates to an integrated Fresnel lens pyroelectric sensor and a preparation method thereof, belonging to the technical field of sensors; the integrated Fresnel lens pyroelectric sensor comprises a Fresnel lens, an induction element, a signal processing chip and a circuit board, wherein the signal processing chip is fixedly arranged at the upper end of the circuit board, and the induction element is fixedly arranged at the upper end of the signal processing chip and is connected with the signal input end of the signal processing chip; the lower end of the circuit board is fixedly connected with a terminal lead, the lower end of the circuit board is also fixedly provided with an adhesive layer, and the adhesive layer is fixedly sleeved on the terminal lead; the Fresnel lens is arranged at the upper end of the adhesive layer and is fixedly connected with the circuit board; the Fresnel lens covers the circuit board and the signal processing chip. Compared with the prior art, the utility model discloses can promote pyroelectric sensor's signal response speed and response area, reduce production technology complexity, promote production efficiency.
Description
Technical Field
The utility model relates to a sensor technical field, particularly, in particular to integrated fresnel lens pyroelectric sensor.
Background
The pyroelectric sensor in the prior art adopts a large-sized TO39/5 base, the diameter of the base is 10MM, and the height of the base is 4-5 MM; the pyroelectric sensor is also processed by adopting materials such as a gasket, a PCB (printed circuit board), an infrared filter, a tube cap and the like; the assembly step of the pyroelectric sensor comprises: TO39 base loading → pad loading and dispensing → PCB processing → PCB circuit board loading and dispensing → point silver link TO39 base lead and PCB circuit board → die bonding pad → die bonding induction element point silver → loading tube cap → sealing and welding → test.
However, the prior art solution has the following disadvantages: the existing pyroelectric sensor has a complex structure, large signal attenuation and low signal detection sensitivity; the process is complex, the required parts are many, and the required equipment investment is large.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, an object of the utility model is to provide a promote pyroelectric sensor's signal response speed and response area, reduce production technology complexity, promote production efficiency's integrated fresnel lens pyroelectric sensor.
The utility model provides an above-mentioned technical problem's technical scheme as follows: the integrated Fresnel lens pyroelectric sensor comprises a Fresnel lens, an induction element, a signal processing chip and a circuit board; the signal processing chip is fixedly arranged at the upper end of the circuit board, and the induction element is fixedly arranged at the upper end of the signal processing chip and is connected with the signal input end of the signal processing chip; the lower end of the circuit board is fixedly connected with a terminal lead, the lower end of the circuit board is also fixedly provided with an adhesive layer, and the adhesive layer is fixedly sleeved on the terminal lead; the Fresnel lens is arranged at the upper end of the adhesive layer and is fixedly connected with the circuit board; the Fresnel lens covers the circuit board and the signal processing chip.
The utility model has the advantages that: the Fresnel lens is used for replacing an infrared filter, so that the sensitivity of infrared induction is improved, and the signal response speed of the pyroelectric sensor is improved; a Fresnel lens is used for light condensation, and multi-channel and multi-signal integration is carried out, so that the response area of the pyroelectric sensor is increased; the complexity of the structure of the pyroelectric sensor can be reduced, the signal attenuation is reduced, and the signal detection sensitivity is improved; the pyroelectric sensor is convenient to assemble, the complexity of the production process is reduced, and the production efficiency is improved.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, a plurality of condensing lenses are fixedly arranged at the top of the inner side of the Fresnel lens, and the plurality of condensing lenses are sequentially arranged along the inner wall of the Fresnel lens.
The beneficial effect of adopting the further scheme is that: utilize a plurality of condensing lens to carry out the spotlight to the light that gets into fresnel lens to improve infrared induction's sensitivity, thereby promote pyroelectric sensor's signal response speed.
Furthermore, the Fresnel lens is connected with the circuit board in a sealing mode through plastic.
The beneficial effect of adopting the further scheme is that: the pyroelectric sensor simplifies the production process, improves the production efficiency, reduces the equipment investment and can also improve the thermal interference capability of the sensing element and the signal processing chip.
Further, the end part of the terminal lead in the adhesive layer is of a flat structure.
The beneficial effect of adopting the further scheme is that: can avoid the terminal lead wire to produce and rotate, improve the viscose layer bonding reliability.
Drawings
Fig. 1 is a front view of the integrated fresnel lens pyroelectric sensor of the present invention;
fig. 2 is a front view of the sensor, the signal processing chip, the circuit board and the terminal lead of the present invention;
fig. 3 is a front view of the fresnel lens of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. fresnel lens, 1.1, condensing lens;
2. an induction element;
3. a signal processing chip;
4. a circuit board;
5. a terminal lead;
6. and (5) gluing the layers.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to fig. 3, it is a front view of the integrated fresnel lens pyroelectric sensor of the present invention. The utility model provides an integrated Fresnel lens pyroelectric sensor, which comprises a Fresnel lens 1, an induction element 2, a signal processing chip 3 and a circuit board 4;
specifically, the signal processing chip 3 is fixedly arranged at the upper end of the circuit board 4, and the sensing element 2 is fixedly arranged at the upper end of the signal processing chip 3 and is connected with the signal input end of the signal processing chip 3; the lower end of the circuit board 4 is fixedly connected with a terminal lead 5, the lower end of the circuit board 4 is also fixedly provided with an adhesive layer 6, and the adhesive layer 6 is fixedly sleeved on the terminal lead 5; the Fresnel lens 1 is arranged at the upper end of the adhesive layer 6 and is fixedly connected with the circuit board 4; the Fresnel lens 1 covers the circuit board 4 and the signal processing chip 3.
External light is emitted to the sensing element 2 through the Fresnel lens 1, the sensing element 2 senses infrared signals, the infrared signals are converted into electric signals, and the electric signals are transmitted to the signal processing chip 3 through the conductive gasket and the circuit board 4 to be processed, so that sensing signals are obtained; the induction signal is output through the terminal lead 5.
In the embodiment, the Fresnel lens 1 is used for replacing an infrared filter, so that the sensitivity of infrared induction is improved, and the signal response speed of the pyroelectric sensor is improved; the Fresnel lens 1 is used for light condensation, and multi-channel and multi-signal integration is carried out, so that the response area of the pyroelectric sensor is increased; the complexity of the structure of the pyroelectric sensor can be reduced, the signal attenuation is reduced, and the signal detection sensitivity is improved; the pyroelectric sensor is convenient to assemble, the complexity of the production process is reduced, and the production efficiency is improved.
In the above embodiment, the top of the inner side of the fresnel lens 1 is fixedly provided with a plurality of condensing lenses 1.1, and the plurality of condensing lenses 1.1 are sequentially arranged along the inner wall of the fresnel lens 1.
This embodiment utilizes a plurality of condensing lens 1.1 to carry out spotlight to the light that gets into fresnel lens 1 to improve infrared induction's sensitivity, thereby promote pyroelectric sensor's signal response speed.
In the above embodiment, the fresnel lens 1 and the circuit board 4 are connected by plastic sealing.
This embodiment can seal induction element 2 and signal processing chip 3 in fresnel lens 1 and circuit board 4, has simplified pyroelectric sensor to production technology, improves production efficiency, reduces the equipment investment, can also promote induction element 2 and signal processing chip 3's thermal interference ability.
In the above embodiment, the terminal lead 5 has a flat structure at the end inside the adhesive layer 6.
The terminal lead 5 of the present embodiment has a flat end, which prevents the terminal lead 5 from rotating and improves the reliability of the adhesion of the adhesive layer 6.
For preparing above-mentioned integrated fresnel lens pyroelectric sensor, the utility model also provides a preparation method of integrated fresnel lens pyroelectric sensor, including following step:
s1, fixing the signal processing chip 3 on the circuit board 4 in a die bonding mode, and enabling the signal processing chip 3 to be electrically connected with the circuit board 4;
s2, fixing the induction element 2 on the circuit board 4 through a conductive gasket to enable the induction element 2 to be positioned at the upper end of the signal processing chip 3 and electrically connected with the signal processing chip 3;
s3, mounting a terminal lead 5 on the lower end of the circuit board 4, so that the terminal lead 5 is electrically connected to the signal processing chip 3 through the circuit board 4;
s4, assembling the fresnel lens 1 on the circuit board 4, and covering the sensing element 2 and the signal processing chip 3 with the fresnel lens 1.
In the embodiment, the Fresnel lens 1 is used for replacing an infrared filter, so that the sensitivity of infrared induction is improved, and the signal response speed of the pyroelectric sensor is improved; the Fresnel lens 1 is used for light condensation, and multi-channel and multi-signal integration is carried out, so that the response area of the pyroelectric sensor is increased; the complexity of the structure of the pyroelectric sensor can be reduced, the signal attenuation is reduced, and the signal detection sensitivity is improved; the pyroelectric sensor is convenient to assemble, the complexity of the production process is reduced, and the production efficiency is improved.
In the above embodiment, the fresnel lens 1 and the circuit board 4 are connected by plastic sealing.
This embodiment can seal induction element 2 and signal processing chip 3 in fresnel lens 1 and circuit board 4, has simplified pyroelectric sensor to production technology, improves production efficiency, reduces the equipment investment, can also promote induction element 2 and signal processing chip 3's thermal interference ability.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. Integration fresnel lens pyroelectric sensor, its characterized in that: the Fresnel lens type optical fiber sensing device comprises a Fresnel lens (1), an induction element (2), a signal processing chip (3) and a circuit board (4), wherein the signal processing chip (3) is fixedly arranged at the upper end of the circuit board (4), and the induction element (2) is fixedly arranged at the upper end of the signal processing chip (3) and is connected with a signal input end of the signal processing chip (3); the lower end of the circuit board (4) is fixedly connected with a terminal lead (5), the lower end of the circuit board (4) is also fixedly provided with an adhesive layer (6), and the adhesive layer (6) is fixedly sleeved on the terminal lead (5); the Fresnel lens (1) is arranged at the upper end of the adhesive layer (6) and is fixedly connected with the circuit board (4); the Fresnel lens (1) covers the circuit board (4) and the signal processing chip (3).
2. The integrated fresnel lens pyroelectric sensor according to claim 1, wherein: the Fresnel lens is characterized in that a plurality of condensing lenses (1.1) are fixedly arranged at the top of the inner side of the Fresnel lens (1), and the plurality of condensing lenses (1.1) are sequentially arranged along the inner wall of the Fresnel lens (1).
3. The integrated fresnel lens pyroelectric sensor according to claim 1, wherein: the Fresnel lens (1) is connected with the circuit board (4) in a sealing mode through plastic.
4. The integrated fresnel lens pyroelectric sensor according to claim 1, wherein: the terminal lead (5) is in the end part in the adhesive layer (6) and is in a flat structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120777573.0U CN214667294U (en) | 2021-04-16 | 2021-04-16 | Integrated Fresnel lens pyroelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120777573.0U CN214667294U (en) | 2021-04-16 | 2021-04-16 | Integrated Fresnel lens pyroelectric sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214667294U true CN214667294U (en) | 2021-11-09 |
Family
ID=78462841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120777573.0U Active CN214667294U (en) | 2021-04-16 | 2021-04-16 | Integrated Fresnel lens pyroelectric sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214667294U (en) |
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2021
- 2021-04-16 CN CN202120777573.0U patent/CN214667294U/en active Active
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