WO2019227377A1 - 一种热释电传感器 - Google Patents

一种热释电传感器 Download PDF

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Publication number
WO2019227377A1
WO2019227377A1 PCT/CN2018/089219 CN2018089219W WO2019227377A1 WO 2019227377 A1 WO2019227377 A1 WO 2019227377A1 CN 2018089219 W CN2018089219 W CN 2018089219W WO 2019227377 A1 WO2019227377 A1 WO 2019227377A1
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Prior art keywords
pin
base
electrode
sensing unit
pyroelectric sensor
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PCT/CN2018/089219
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English (en)
French (fr)
Inventor
张�浩
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深圳通感微电子有限公司
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Application filed by 深圳通感微电子有限公司 filed Critical 深圳通感微电子有限公司
Priority to PCT/CN2018/089219 priority Critical patent/WO2019227377A1/zh
Publication of WO2019227377A1 publication Critical patent/WO2019227377A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
    • G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors

Definitions

  • the invention relates to the field of sensors, and more particularly, to a pyroelectric sensor.
  • a junction field effect tube is arranged inside the sensor, and the induction signal generated by the induction element is led out through the junction field effect tube.
  • this method has a complicated process in the production process of the sensor, and the structure of the finished product is also complicated.
  • the signals of the sensing elements cannot be directly coupled, and the junction field effect tube also has a DC bias interference, resulting in the final output signal having a junction field effect tube. Noise coupling, signal instability, and poor mechanical properties.
  • the technical problem to be solved by the present invention is to provide a pyroelectric sensor in response to the above defects of the prior art.
  • a pyroelectric sensor which includes: a base, an induction unit, and a tube cap;
  • the sensing unit is disposed on the first end of the base and is electrically connected to the first end of the base to output an electrical signal through the first end of the base;
  • the tube cap cover is disposed on the periphery of the first end of the base, and the tube cap is provided with a sensing window corresponding to the sensing direction of the sensing unit.
  • the sensing unit includes a substrate, a first electrode disposed on a side of the substrate facing the cap, and a second electrode disposed on the substrate facing the base;
  • the second electrode includes a first sub-electrode and a second sub-electrode that are separately provided and insulated from each other.
  • the substrate includes the following raw materials in mass parts: 45-65 parts of lead oxide, 20-30 parts of zirconia, 2-5 parts of nickel pentoxide, 5-8 parts of titanium dioxide, and 0.5-2 parts of manganese oxide.
  • the base includes a first pin and a second pin separately provided and insulated from each other;
  • the sensing unit is mounted on a first end of the first pin and a first end of the second pin, and the sensing unit corresponds to the first end of the first pin and the second pin
  • the first end of the pin is provided with a first conductive bit and a second conductive bit
  • the first conductive potential is in communication with the first sub-electrode
  • the second conductive potential is in communication with the second sub-electrode
  • a silver paste is provided on a surface of the first conductive bit and the second conductive bit; the first end of the first pin and the first end of the second pin pass through the silver paste. And are electrically connected to the first sub-electrode and the second sub-electrode, respectively.
  • both the first end of the first pin and the first end of the second pin are circular frustums.
  • a support is provided between the first end of the first pin and the first end of the second pin, and the sensing unit is disposed and fixed on the support and is respectively connected with the first
  • a first end of a pin is conductively connected to a first end of the second pin.
  • the support is a non-conductive gasket or silicone.
  • the sensing window includes an opening and a filter provided at the opening for blocking a set light
  • the filter is fixed on the cap by a conductive adhesive, and an outer peripheral dimension of the filter is larger than an inner peripheral dimension of the opening.
  • the tube cap has a hollow cylindrical shape, a rectangular parallelepiped shape, or a rectangular parallelepiped shape.
  • the induction unit in the pyroelectric sensor of the present invention directly leads the electrical signal of the induction unit through the first end of the base, which significantly reduces the packaging cost of the sensor, improves the flexibility of the sensor in different applications on the client, and directly extracts the induction
  • the electric signal of the unit has no interference from the intermediate circuit, the thermal field and output signal of the sensor are more stable, the structure is more compact, the heat dissipation performance is better, and the resistance to mechanical shock is stronger.
  • FIG. 1 is a schematic structural diagram of a pyroelectric sensor according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a side of a sensing unit facing a base of the present invention.
  • FIG. 1 is a schematic structural diagram of a pyroelectric sensor according to an embodiment of the present invention.
  • the pyroelectric sensor may include a base 10, a sensing unit 20, and a tube cap 30.
  • the sensing unit 20 is disposed on the first end of the base 10 and is conductively connected to the first end of the base 10 to output an electrical signal through the first end of the base 10;
  • the tube cap 30 is disposed on the first end of the base 10 And a sensing window corresponding to the sensing direction of the sensing unit 20.
  • the base 10 includes a first pin 11 and a second pin 12 which are separately disposed and insulated from each other. A gap is formed between the first end of the first pin 11 and the first end of the second pin 12, and the insulation between the first pin 11 and the second pin 12 can be achieved through the gap.
  • the first end of the first pin 11 and the first end of the second pin 12 constitute a first end of the base 10.
  • the second end of the first pin 11 and the second end of the second pin 12 constitute the second end of the base 10, and pass through the second end of the first pin 11 and the second end of the second pin 12 to
  • the external circuit is connected to output the electrical signal generated by the induction unit 20 to an external circuit, and the external circuit processes the electrical signal generated by the induction unit 20.
  • the base 10 is a glass-metal sealed base.
  • the base 10 may be a TO base, for example, TO46, TO5, TO39, or the like may be used.
  • the TO base can be used to provide the sensing unit 20 with pins connected to external circuits (the first pin 11 and the second pin 12 described above), and directly connect to the sensing unit 20 to directly extract the electrical signals generated by the sensing unit 20 and Transmission to external circuits can also effectively improve thermal balance and reduce thermal interference.
  • the sensing unit 20 is mounted on the first end of the first pin 11 and the first end of the second pin 12.
  • the sensing unit 20 includes a substrate 21, a first electrode 22 and a second electrode 23.
  • the first electrode 22 is used as a sensing surface of the sensing unit 20 for sensing a set wavelength band.
  • the first electrode 22 may be used to sense a far-infrared signal in a 4-14um band and when the far-infrared signal is sensed, an electric signal is output through the second electrode 23.
  • the second electrode 23 includes a first sub-electrode 231 and a second sub-electrode 232 that are separately provided and insulated from each other.
  • the positions of the sensing unit 20 corresponding to the first end of the first pin 11 and the first end of the second pin 12 are respectively provided with a first conductive bit 2311 and a second conductive bit 2321. That is, the first conductive bit 2311 is disposed on the first sub-electrode 231, and the second conductive bit 2321 is disposed on the second sub-electrode 232.
  • the sensing unit 20 is conductively connected to the first end of the first pin 11 and the first end of the second pin 12 through the first conductive bit 2311 and the second conductive bit 2321, respectively, so that the sensing unit 20 is conductive with the base 10. connection.
  • the first electrode 22 serves as the positive electrode of the sensing unit 20 and the second electrode 23 serves as the negative electrode of the sensing unit 20, that is, the first sub-electrode 231 and the second sub-electrode 232 are both negative electrodes of the sensing unit 20.
  • the first electrode 22 senses a 4-14um far-infrared signal, it absorbs the far-infrared signal and generates corresponding heat, while generating a voltage on the substrate 21 and outputting an electrical signal through the first sub-electrode 231 and the second sub-electrode 232.
  • the sensing unit 20 When the sensing unit 20 senses an infrared signal and generates an electric signal, the electric signal generated by the sensing unit 20 is directly output through the first conductive bit 2311 and the second conductive bit 2321, and is directly provided by the first pin 11 and the second pin 12 The electric signal generated by the sensing unit 20 is transmitted to an external circuit.
  • the first conductive bit 2311 and the second conductive bit 2321 are both provided with silver paste, and the first end of the first pin 11 and the first end of the second pin 12 may be connected by the silver paste, respectively.
  • the first conductive bit 2311 and the second conductive bit 2321 of the sensing unit 20 are both provided with silver paste, and the first end of the first pin 11 and the first end of the second pin 12 may be connected by the silver paste, respectively.
  • the first electrode 22 may be set in an “I” shape, or may be set in other shapes, which may be specifically determined according to the requirements of the client, and the present invention is not limited to the “I” shape.
  • the second electrode 23 may also be set in an “I” shape, wherein the “I” shape of the second electrode 23 is formed by the first sub-electrode 231 and the second sub-electrode 232. Understandably, the first sub-electrode 231 and the second sub-electrode 232 may also be determined according to the requirements of the client, and are not limited to the shapes listed in this embodiment.
  • first electrode 22 is disposed on the substrate 21 side facing the cap 30, and the second electrode 23 is disposed on the substrate 21 side facing the base 10.
  • the raw materials of the substrate 21 include lead oxide (PbO), zirconia (ZrO 2 ), nickel pentoxide (Ni 2 O 5 ), titanium dioxide (TiO 2 ), and manganese oxide (MnO).
  • the mass parts of lead oxide are: 45-65 parts
  • the mass parts of zirconia are: 20-30 parts
  • the mass parts of nickel pentoxide are: 2-5 parts
  • the mass parts of titanium dioxide are: 5- 8 parts
  • mass parts of manganese oxide 0.5-2 parts.
  • manganese oxide is a catalyst.
  • the present invention can effectively improve the internal resistance of the induction unit 20 and the conductive performance of the induction unit 20 by changing the mass parts of the raw material of the substrate 21 and increasing the mass parts of the manganese oxide of the catalyst.
  • the metal surface further improves the thermal interference of the induction unit 20.
  • the first end of the first pin 11 in this embodiment is preferably a round table, that is, the first pin 11 in this embodiment is "T" pin.
  • the first end of the first pin 11 in this embodiment is “T” pin.
  • the contact area between the first pin 11 and the silver paste is increased, thereby enhancing the connection between the sensing unit 20 and the base 10, and also enhancing the first
  • the connection performance between the pin 11 and the silver paste enhances the conductive stability of the first pin 11 and the first sub-electrode 231.
  • the first end of the second pin 12 in this embodiment is also preferably in a round table state, that is, the second pin 12 in this embodiment is also a “T” pin.
  • the contact area between the second pin 12 and the silver paste is increased, thereby enhancing the connection between the sensing unit 20 and the base 10, and also enhancing the second
  • the connection performance between the pin 12 and the silver paste enhances the conductive stability of the second pin 12 and the second sub-electrode 232.
  • a support is provided in a gap between the first end of the first pin 11 and the first end of the second pin 12, and the sensing unit 20 is disposed and fixed on the gap.
  • the support member is electrically connected to the first end of the first pin 11 and the first end of the second pin 12 through a silver paste.
  • the support member may be first fixed in a gap between the first end of the first pin 11 and the first end of the second pin 12 by means of dispensing or patching, so that the support member is fixed to the base.
  • the base 10 faces the surface of the induction unit 20, and then the induction unit 20 is attached to the support to make the induction unit 20 initially fixed, and then the induction unit 20 is sintered on the first end of the first pin 11 and the first pin 11 through silver paste.
  • the sensing unit 20 is finally fixed on the base 10.
  • the support member may be a non-conductive gasket or silicone, and the non-conductive gasket or silicone may support the sensing unit 20 to improve the mechanical strength of the pyroelectric sensor.
  • the heat generated by the induction unit 20 can also be transferred to the base 10 through a non-conductive gasket or silica gel to accelerate the heat dissipation of the induction unit 20, improve the heat dissipation capability of the pyroelectric sensor, and reduce thermal interference.
  • a sensing window is provided on the top of the cap 30.
  • the sensing window includes an opening 31 and a filter 40 disposed at the opening 31 to block a set light, and the filter 40 is disposed on an inner side of the tube cap 30.
  • the outer peripheral dimension of the filter 40 is larger than the inner peripheral dimension of the opening 31.
  • the size of the opening 31 is based on not being smaller than the sensing area of the sensing unit 20, that is, the size of the inner periphery of the opening 31 is not smaller than the sensing area of the sensing unit 20.
  • the filter 40 may be fixed on the tube cap 30 through conductive adhesive, or may be fixed on the tube cap 30 through interference fit. Further, the filter 40 in this embodiment can filter out light other than 4-14um, so that the sensing unit 20 can sense far-infrared light of 4-14um.
  • the filter 40 may be replaced by glass without filtering effect.
  • glass without filtering effect is provided at the opening 31, generally, glue can be dispensed on the sensing surface of the sensing unit, and glue Filter particles are mixed in the filter particles to block the set light.
  • the tube cap 30 may be filled with glue to form a sealant layer, the sensing unit 20 is covered therein, and the sealant layer is mixed with filter particles. The light is blocked by filter particles.
  • the tube cap 30 is preferably a hollow cylindrical shape, a rectangular parallelepiped shape, or a rectangular parallelepiped shape.
  • the tube cap 30 may also be in the shape of a hollow circular table, and the opening 31 is provided on the top surface of the circular table.
  • the tube cap 30 is set in a hollow circular table shape, so that the sensing unit 20 can sense more light. It should be noted here that the tube cap 30 can also be designed with other irregular shapes, as long as it satisfies the shape of the hyperthyroidism on the periphery of the sensing unit 20.
  • the tube cap 30 is an opaque metal tube cap 30.
  • the metal tube cap 30 and the base 10 can form a sealed packaging structure to encapsulate the sensing unit 20 between the metal tube cap 30 and the base 10. In a closed space, the interference of the sensing unit 20 from light and the damage of the sensing unit 20 from foreign objects can also be avoided.
  • the pipe cap 30 may also be configured as a flat window structure or a slanted window structure, which may be specifically determined according to the needs of the client, which is not specifically limited in the present invention.
  • an external light source enters the pyroelectric sensor through a filter 40.
  • the filter 40 filters out light other than 4 to 14um in the light source.
  • the filtered far-infrared light passes through the filtered light and reaches the sensing unit. 20, after the sensing unit 20 senses the infrared signal, it generates an electrical signal and outputs it directly through the first pin 11 and the second pin 12.
  • the present invention provides a sealed package structure for the sensing unit 20 by sealing the base 10 with glass metal, and the sensing unit 20 is directly connected to the pins provided by the base 10, eliminating the need for the sensing unit 20 and the base 10.
  • the PCB board and the induction unit 20 can be directly conductively connected to the base 10, and the electrical signals generated by the induction unit 20 are directly led out by the pins of the base 10 without the interference of the intermediate circuit, which makes the signal transmission more stable and the pyroelectric sensor
  • the thermal field and structure are more stable, and the induction unit 20 is directly conductively connected to the base 10, which effectively transmits thermal balance and reduces thermal interference.
  • the mechanical impact strength of the pyroelectric sensor is also improved, the packaging cost of the sensor is significantly reduced, and the flexibility of the sensor application on the client in different occasions is improved.
  • the raw material of the substrate 21 of the induction unit 20 of the present invention adopts a new ratio, which effectively improves the internal resistance of the induction unit 20, and can optimize the internal resistance of the original induction unit 20 from 10-100 Gohm to 0.1-3 Gohm, which greatly reduces The internal resistance of the sensing unit 20 is improved, so that the conductivity of the sensing unit 20 is better.

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Abstract

本发明涉及一种热释电传感器，包括：基座、感应单元、以及管帽；感应单元设置在基座的第一端上并与基座的第一端导电连接，以通过基座的第一端输出电信号；管帽罩设在基座的第一端外围，且管帽对应感应单元的感应方向设有感应窗口。本发明的热释电传感器中的感应单元直接通过基座的第一端引出感应单元的电信号，显著降低传感器的封装成本，提高了传感器在客户端不同场合应用的灵活性，且直接提取感应单元的电信号，没有中间电路的干扰，传感器的热场更稳定，结构更紧凑，散热性能更好，抗机械冲击能力更强。

Description

一种热释电传感器 技术领域
本发明涉及传感器领域，更具体地说，涉及一种热释电传感器。
 背景技术
现有的热释电传感器，在传感器内部设置结型场效应管，并通过结型场效应管引出感应元所产生的感应信号。但是，该种方式在传感器生产过程中工艺复杂，成品结构也复杂，感应元的信号不能直接耦合，且结型场效应管还有直流偏压干扰，导致最终输出的信号有结型场效应管的噪音耦合，信号不稳定，机械性能差。
 技术问题
本发明要解决的技术问题在于，针对现有技术的上述缺陷，提供一种热释电传感器。
 技术解决方案
本发明解决其技术问题所采用的技术方案是：构造一种热释电传感器，包括：基座、感应单元、以及管帽；
所述感应单元设置在所述基座的第一端上并与所述基座的第一端导电连接，以通过所述基座的第一端输出电信号；
所述管帽罩设在所述基座的第一端外围，且所述管帽对应所述感应单元的感应方向设有感应窗口。
优选地，所述感应单元包括基板、设置在所述基板朝向所述管帽一侧的用于感应设定波段的第一电极、以及设置在所述基板朝向所述基座的第二电极；所述第二电极包括分开设置且相互绝缘的第一子电极和第二子电极。
优选地，所述基板包括以下质量份数的原料：氧化铅45-65份、氧化锆20-30份、五氧化二镍2-5份、二氧化钛5-8份以及氧化锰0.5-2份。
优选地，所述基座包括分开设置并相互绝缘的第一引脚和第二引脚；
所述感应单元安装在所述第一引脚的第一端和所述第二引脚的第一端上，且所述感应单元对应所述第一引脚的第一端和所述第二引脚的第一端设有第一导电位和第二导电位；
所述第一导电位与所述第一子电极连通，所述第二导电位与所述第二子电极连通。
优选地，所述第一导电位和所述第二导电位的表面均设有银浆；所述第一引脚的第一端和所述第二引脚的第一端通过所述银浆分别与所述第一子电极和所述第二子电极导电连接。
优选地，所述第一引脚的第一端和所述第二引脚的第一端均为圆台状。
优选地，所述第一引脚的第一端和所述第二引脚的第一端之间设有支撑件，所述感应单元设置并固定在所述支撑件上并分别与所述第一引脚的第一端和所述第二引脚的第一端导电连接。
优选地，所述支撑件为不导电垫片或者硅胶。
优选地，所述感应窗口包括开口、以及设置在所述开口处用于阻隔设定光线的滤光片；
所述滤光片通过导电胶固定在管帽上，所述滤光片的外周尺寸大于所述开口的内周尺寸。
优选地，所述管帽为中空的圆柱状、正方体状或者长方体状。
 有益效果
本发明的热释电传感器中的感应单元直接通过基座的第一端引出感应单元的电信号，显著降低传感器的封装成本，提高了传感器在客户端不同场合应用的灵活性，且直接提取感应单元的电信号，没有中间电路的干扰，传感器的热场及输出信号更稳定，结构更紧凑，散热性能更好，抗机械冲击能力更强。
 附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明一实施例的热释电传感器的结构示意图；
图2为本发明感应单元朝向基座一侧的结构示意图。
 本发明的最佳实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
如图1所示，为本发明一实施例的热释电传感器的结构示意图。在该实施例中，该热释电传感器可以包括基座10、感应单元20、以及管帽30。感应单元20设置在基座10的第一端上并与基座10的第一端导电连接，以通过基座10的第一端输出电信号；管帽30罩设在基座10的第一端外围，且管帽30对应感应单元20的感应方向设有感应窗口。
其中，该基座10包括分开设置并相互绝缘的第一引脚11和第二引脚12。该第一引脚11的第一端和第二引脚12的第一端之间形成一空隙，通过该空隙可实现第一引脚11和第二引脚12之间的绝缘。该第一引脚11的第一端和第二引脚12的第一端构成基座10的第一端。第一引脚11的第二端和第二引脚12的第二端构成基座10的第二端，并通过第一引脚11的第二端和第二引脚12的第二端与外部电路连接，以将感应单元20产生的电信号输出至外部电路，由外部电路对感应单元20产生的电信号进行处理。
可选的，该基座10为玻璃金属封接基座。进一步地，本实施例中，该基座10可以采用TO基座，例如，可以采用TO46、TO5、TO39等。采用TO基座可以为感应单元20提供与外部电路连接的引脚（上述的第一引脚11和第二引脚12）、与感应单元20直接连接，直接提取感应单元20产生的电信号并传输到外部电路，同时还可以有效改善热平衡，减少热干扰。
该实施例中，感应单元20安装在第一引脚11的第一端和第二引脚12的第一端上。具体的，感应单元20包括基板21、第一电极22和第二电极23。该第一电极22作为感应单元20的感应面，用于感应设定波段。例如，在一个具体实施例中，该第一电极22可用于感应4-14um波段的远红外信号并在感应到该远红外信号时，通过第二电极23输出电信号。如图2所示，第二电极23包括分开设置且相互绝缘的第一子电极231和第二子电极232。并且，该感应单元20对应第一引脚11的第一端和第二引脚12的第一端的位置分别设有第一导电位2311和第二导电位2321。即该第一导电位2311设置在第一子电极231上，第二导电位2321设置在第二子电极232上。该感应单元20通过第一导电位2311和第二导电位2321分别与第一引脚11的第一端和第二引脚12的第一端导电连接，从而实现感应单元20与基座10导电连接。
其中，第一电极22作为感应单元20的正电极，第二电极23作为感应单元20的负电极，即第一子电极231和第二子电极232均为感应单元20的负电极。当第一电极22感应4-14um的远红外信号时，吸收远红外信号并产生相应的热量，同时在基板21上产生电压并通过第一子电极231和第二子电极232输出电信号。
当感应单元20感应到红外信号并产生电信号时，直接通过第一导电位2311和第二导电位2321输出感应单元20产生的电信号，并直接由第一引脚11和第二引脚12将感应单元20产生的电信号传输至外部电路。
作为选择，该实施例中，第一导电位2311和第二导电位2321均设有银浆，第一引脚11的第一端和第二引脚12的第一端可分别通过银浆连接感应单元20的第一导电位2311和第二导电位2321。
如图1所示，该第一电极22可以设为“工”字形，或者还可以设置为其他形状，具体可根据客户端的需求确定，本发明不限于“工”字形。同样地，第二电极23也可以设为“工”字形，其中，第二电极23的“工”字形是由第一子电极231和第二子电极232形成的。可以理解地，第一子电极231和第二子电极232也可以根据客户端的需求确定，并不限于本实施例所列举的形状。
进一步地，第一电极22设置在基板21朝向管帽30一侧，第二电极23设置在基板21朝向基座10的一侧。
作为选择，该基板21的原料包括氧化铅（PbO）、氧化锆（ZrO 2）、五氧化二镍（Ni 2O 5）、二氧化钛（TiO 2）以及氧化锰（MnO）。氧化铅的质量份数为：45-65份，氧化锆的质量份数为：20-30份，五氧化二镍的质量份数为：2-5份，二氧化钛的质量份数为：5-8份，氧化锰的质量份数为：0.5-2份。其中，氧化锰为催化剂。本发明通过改变基板21的原料质量份数，并加大催化剂氧化锰的质量份数，可以有效改善感应单元20的内阻，提高感应单元20的导电性能，而且感应单元20的辐射面均为金属面，进一步地改善感应单元20的热干扰。
为了加强第一引脚11和第二引脚12与感应单元20的导电性能，该实施例的第一引脚11的第一端优选为圆台状，即该实施例的第一引脚11为“T”形引脚。通过将第一引脚11的第一端设置为圆台状，加大了第一引脚11与银浆的接触面积，从而增强了感应单元20与基座10的连接，同时还增强了第一引脚11与银浆的连接性能，加强了第一引脚11与第一子电极231的导电稳定性。同样地，该实施例的第二引脚12的第一端也优选为圆台状态，即该实施例的第二引脚12也为“T”形引脚。通过将第二引脚12的第一端设置为圆台状，加大了第二引脚12与银浆的接触面积，从而增强了感应单元20与基座10的连接，同时还增强了第二引脚12与银浆的连接性能，加强了第二引脚12与第二子电极232的导电稳定性。
进一步地，为了提升感应单元20的抗机械强度能力，第一引脚11的第一端和第二引脚12的第一端之间的空隙设有支撑件，感应单元20设置并固定在该支撑件上，且感应单元20分别与第一引脚11的第一端和第二引脚12的第一端通过银浆导电连接。从而提升了感应单元20的抗机械强度能力及稳定性，同时还可以加快散热，通过支撑件将感应单元20产生的热量传递至基座10，加速散热。具体的，可以先通过点胶或贴片的方式将支撑件固定在第一引脚11的第一端和第二引脚12的第一端之间的空隙内，以使支撑件固定在基座10朝向感应单元20的表面，然后再将感应单元20贴设在支撑件上，使感应单元20初步固定，接着通过银浆将感应单元20烧结在第一引脚11的第一端和第二引脚12的第一端上，使感应单元20最终固定在基座10上。
作为选择，支撑件可以为不导电的垫片或者硅胶，通过不导电的垫片或者硅胶可以对感应单元20起到支撑的作用，以提高热释电传感器的机械强度。同时还可以将感应单元20产生的热量通过不导电的垫片或者硅胶传递至基座10，加快感应单元20的散热，提升热释电传感器的散热能力，降低热干扰。
在该实施例中，感应窗口设置在管帽30的顶部。作为选择，该感应窗口包括开口31、以及设置在开口31处用于阻隔设定光线的滤光片40，且该滤光片40设置在管帽30的内侧面。进一步地，滤光片40的外周尺寸大于开口31的内周尺寸。其中，开口31的大小以不小于感应单元20的感应面积为基准，即开口31的内周尺寸不小于感应单元20的感应面积。
作为选择，滤光片40可以通过导电胶固定在管帽30上，也可以通过过盈配合固定在管帽30上。进一步地，该实施例的滤光片40可滤除4~14um以外的光线，进而使感应单元20可以感应4~14um的远红外光。
在其他实施例中，滤光片40可以采用没有滤光作用的玻璃替代，当在开口31处设置的是没有滤光作用的玻璃时，一般可在感应单元的感应面上点胶水，且胶水中混合有滤光颗粒，通过滤光颗粒阻隔设定光线。
或者，在开口31处也可以不设置任何遮挡物，此时，可以在管帽30内灌胶以形成封胶层，将感应单元20包覆在内，同时封胶层混合有滤光颗粒，通过滤光颗粒阻隔设定光线。
在该实施例中，管帽30优选为中空的圆柱状、正方体状或者长方体状。在一些其他实施例中，管帽30还可以为中空的圆台状，开口31设置在圆台的顶面。将管帽30设置成中空的圆台状，可以使感应单元20能够感应到更多的光线。在此需要说明的是，管帽30还可以设计为其他不规则形状，只要是满足甲亢在感应单元20外围的形状均可。
进一步地，该管帽30为不透光的金属管帽30，该金属管帽30可与基座10形成密闭的封装结构，以将感应单元20封装在金属管帽30与基座10形成的密闭空间内，从而避免感应单元20受光线的干扰，也可以避免感应单元20受到外物的破坏。
该实施例中，管帽30还可以设置为平窗结构或者斜窗结构，具体可以根据客户端需求确定，本发明不作具体限定。
该热释电传感器工作时，外部光源通过滤光片40进入热释电传感器内，滤光片40将光源中4~14um以外的光线滤除，过滤后的远红外光透过滤波光到达感应单元20，感应单元20感应到红外信号后，即产生电信号，并直接通过第一引脚11和第二引脚12输出。
本发明通过采用玻璃金属封接基座10，给感应单元20提供一密闭的封装结构，且感应单元20直接与基座10所提供的引脚连接，省去了感应单元20与基座10之间的PCB板，感应单元20可与基座10直接导电连接，由基座10的引脚直接引出感应单元20产生的电信号，没有中间电路的干扰，使信号传输更加稳定，热释电传感器的热场、结构更稳定，且感应单元20与基座10直接导电连接，有效发送热平衡，减少了热干扰。同时，还提高了热释电传感器的机械冲击强度，显著降低传感器的封装成本，提高了传感器在客户端在不同场合应用的灵活性。
另外，本发明的感应单元20的基板21的原料采用新的配比，有效改善感应单元20的内阻，可将原有感应单元20的内阻从10-100Gohm优化到0.1-3Gohm，大大降低了感应单元20的内阻，使感应单元20的导电性能更好。
以上实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据此实施，并不能限制本发明的保护范围。凡跟本发明权利要求范围所做的均等变化与修饰，均应属于本发明权利要求的涵盖范围。
应当理解的是，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (10)

  1. 一种热释电传感器，其特征在于，包括：基座（10）、感应单元（20）、以及管帽（30）；
    所述感应单元（20）设置在所述基座（10）的第一端上并与所述基座（10）的第一端导电连接，以通过所述基座（10）的第一端输出电信号；
    所述管帽（30）罩设在所述基座（10）的第一端外围，且所述管帽（30）对应所述感应单元（20）的感应方向设有感应窗口。
  2. 根据权利要求1所述的热释电传感器，其特征在于，所述感应单元（20）包括基板（21）、设置在所述基板（21）朝向所述管帽（30）一侧用于感应设定波段的第一电极（22）、以及设置在所述基板（21）朝向所述基座（10）的第二电极（23）；所述第二电极（23）包括分开设置且相互绝缘的第一子电极（231）和第二子电极（232）。
  3. 根据权利要求2所述的热释电传感器，其特征在于，所述基板（21）包括以下质量份数的原料：氧化铅45-65份、氧化锆20-30份、五氧化二镍2-5份、二氧化钛5-8份以及氧化锰0.5-2份。
  4. 根据权利要求1所述的热释电传感器，其特征在于，所述基座（10）包括分开设置并相互绝缘的第一引脚（11）和第二引脚（12）；
    所述感应单元（20）安装在所述第一引脚（11）的第一端和所述第二引脚（12）的第一端上，且所述感应单元（20）对应所述第一引脚（11）的第一端和所述第二引脚（12）的第一端设有第一导电位（2311）和第二导电位（2321）；
    所述第一导电位（2311）与所述第一子电极（231）连通，所述第二导电位（2321）与所述第二子电极（232）连通。
  5. 根据权利要求4所述的热释电传感器，其特征在于，所述第一导电位（2311）和所述第二导电位（2321）的表面均设有银浆；所述第一引脚（11）的第一端和所述第二引脚（12）的第一端通过所述银浆分别与所述第一子电极（231）和所述第二子电极（232）导电连接。
  6. 根据权利要求4所述的热释电传感器，其特征在于，所述第一引脚（11）的第一端和所述第二引脚（12）的第一端均为圆台状。
  7. 根据权利要求4所述的热释电传感器，其特征在于，所述第一引脚（11）的第一端和所述第二引脚（12）的第一端之间设有支撑件，所述感应单元（20）设置并固定在所述支撑件上并分别与所述第一引脚（11）的第一端和所述第二引脚（12）的第一端导电连接。
  8. 根据权利要求7所述的热释电传感器，其特征在于，所述支撑件为不导电垫片或者硅胶。
  9. 根据权利要求1所述的热释电传感器，其特征在于，所述感应窗口包括开口（31）、以及设置在所述开口（31）处用于阻隔设定光线的滤光片（40）；
    所述滤光片（40）通过导电胶固定在管帽（30）上，所述滤光片（40）的外周尺寸大于所述开口（31）的内周尺寸。
  10. 根据权利要求9所述的热释电传感器，其特征在于，所述管帽（30）为中空的圆柱状、正方体状或者长方体状。
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