CN208125846U - pyroelectric sensing unit testing machine - Google Patents
pyroelectric sensing unit testing machine Download PDFInfo
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- CN208125846U CN208125846U CN201820687344.8U CN201820687344U CN208125846U CN 208125846 U CN208125846 U CN 208125846U CN 201820687344 U CN201820687344 U CN 201820687344U CN 208125846 U CN208125846 U CN 208125846U
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- pyroelectric sensing
- refrigerator
- thermostatic platform
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Abstract
The utility model discloses a kind of pyroelectric sensing unit testing machines, including thermostatic platform, constant temperature system, thermoelectric ceramics refrigerator, testing and control case and LCR tester and voltage tester, constant temperature system and thermoelectric ceramics refrigerator are set on the thermostatic platform, the pyroelectric sensing unit is placed in thermostatic platform, the pyroelectric sensing unit and testing and control case are electrically connected, the LCR tester and oscillograph and testing and control case pass through electric connection, the external bipolar power supply of thermoelectric ceramics refrigerator, the bipolar power supply cools down to thermoelectric ceramics refrigerator to thermostatic platform, the constant temperature system makes thermostatic platform temperature keep stablizing.Pyroelectric sensing unit testing machine provided by the utility model tests the basic electric parameters of pyroelectricity unit, improves the qualification rate of product.
Description
Technical field
The utility model relates to pyroelectric sensing technical fields, specifically, being related to a kind of pyroelectric sensing unit testing
Machine.
Background technique
Pyroelectric sensing device is a kind of high sensitivity detection element, it can go out extraneous temperature etc. with non-contact detection
Variation, and voltage signal is exported, this voltage signal is amplified, various control circuits can be driven, do not gone together now
There is its application in industry.
Pyroelectric sensing unit is the most important induction component of pyroelectric sensing device, directly affects the spirit of pyroelectric sensing device
Sensitivity, but the parameters such as the capacitor, inductance, voltage of pyroelectric sensing device are tested there is no special equipment now, cause
The pyroelectric sensing unit otherness produced at present is larger, is unable to satisfy the requirement of lean production.
Utility model content
The purpose of this utility model is to provide a kind of heat of basic electric parameters that can test pyroelectricity unit to release
Electric induction unit testing machine.
Technical solution used by pyroelectric sensing unit testing machine disclosed by the utility model is：A kind of pyroelectric sensing
Unit testing machine, including thermostatic platform, constant temperature system, thermoelectric ceramics refrigerator, testing and control case and LCR tester and voltage tester
Instrument is arranged constant temperature system on the thermostatic platform and thermoelectric ceramics refrigerator, the pyroelectric sensing unit is placed in thermostatic platform, institute
It states pyroelectric sensing unit and testing and control case is electrically connected, the LCR tester and oscillograph and testing and control case pass through electricity
Property connection, the external bipolar power supply of thermoelectric ceramics refrigerator, the bipolar power supply is to thermoelectric ceramics refrigerator to constant temperature
Platform cooling, the constant temperature system make thermostatic platform temperature keep stablizing.
Preferably, the thermostatic platform top is equipped with sheet metal, and the pyroelectric sensing unit is placed in sheet metal
Top.
Preferably, the sheet material is copper.
Preferably, the constant temperature system includes pond and circulation waterway, and the pond is set to below sheet metal, institute
Stating pond is made the water in pond keep flowing by circulation waterway and swapped with external source.
Preferably, the water source being recycled in the pond is salt water.
Preferably, the voltage tester is oscillograph.
The beneficial effect of pyroelectric sensing unit testing machine disclosed by the utility model is：Thermoelectric ceramics refrigerator is connected double
Cool down after polarity power to pyroelectric sensing unit, and the amplitude of the controllable cooling of thermoelectric ceramics refrigerator, pyroelectric sensing
Unit, which receives, generates voltage after temperature change, testing and control case adjust pyroelectric sensing unit respectively with LCR tester, voltage
Tester connection, the inductance, capacitor and resistance of pyroelectric sensing unit can be obtained by LCR tester, pass through voltage tester
The variation of voltage can be measured, then the pyroelectric coefficient of pyroelectric sensing unit can be obtained by pyroelectric coefficient formula, passes through inspection
Survey the parameter of pyroelectric sensing unit, it can be ensured that the consistency and reliability of pyroelectric sensing unit improve the qualification rate of product.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model pyroelectric sensing unit testing machine.
Specific embodiment
The utility model is further elaborated and is illustrated with Figure of description combined with specific embodiments below：Please refer to figure
1, a kind of pyroelectric sensing unit testing machine, including thermostatic platform 11, constant temperature system 17, thermoelectric ceramics refrigerator 13, testing and control
Case 14 and LCR tester 16 and voltage tester 15, thermostatic platform 11 are equipped with constant temperature system 17 and thermoelectric ceramics refrigerator 13, heat
It releases electric induction unit and is placed in thermostatic platform 11, pyroelectric sensing unit and testing and control case 14 are electrically connected, 16 He of LCR tester
Oscillograph and testing and control case 14 are by being electrically connected, the external bipolar power supply of thermoelectric ceramics refrigerator 13, bipolar power supply 12
Cool down to thermoelectric ceramics refrigerator 13 to thermostatic platform 11, constant temperature system 17 makes 11 temperature of thermostatic platform keep stablizing, and is made pottery by thermoelectricity
Porcelain refrigerator 13 gives the pyroelectric sensing unit cooling for being placed in thermostatic platform 11, then makes pyroelectric sensing list by constant temperature system 17
Member restores original temperature, and the variation of pyroelectric sensing cell temperature generates the variation of builtin voltage, switches LCR by test controller
Tester 16 and voltage tester 15 form closed circuit with pyroelectric sensing unit respectively, test out the variation of voltage, heat is released
Inductance, capacitor and the resistance of electric induction unit, then calculate by pyroelectric coefficient formula the pyroelectricity of pyroelectric sensing unit
Coefficient.
11 top of thermostatic platform is equipped with sheet metal, and sheet material is copper, and the thermal conduction effect of metal is good, pyroelectric sensing list
Member is placed in gauge sheet metal upper.
Constant temperature system 17 includes pond and circulation waterway, and pond is set to below sheet metal, and pond makes water by circulation waterway
Water in pond keeps flowing and swaps with external source, and the specific heat capacity of water is larger, and the temperature change of thermostatic platform 11 can pass through
Lasting water source absorbs, and 11 temperature of thermostatic platform is made to keep stablizing.
The water source being recycled in pond is salt water, and the freezing point of salt water is low.
Voltage tester 15 is oscillograph, and oscillograph can intuitively reflect the voltage change of each period.
In above scheme, thermoelectric ceramics refrigerator 13 cools down after connecting bipolar power supply 12 to pyroelectric sensing unit, and
And the amplitude of the controllable cooling of thermoelectric ceramics refrigerator 13, then so that workbench is restored to original initial temperature by constant temperature system 17
Degree, pyroelectric sensing unit generate voltage after receiving temperature change, and testing and control case 14 adjusts pyroelectric sensing unit difference
It is connect with LCR tester 16, voltage tester 15, inductance, the capacitor of pyroelectric sensing unit can be obtained by LCR tester 16
And resistance, the variation of voltage can be measured by voltage tester 15, then pyroelectric sensing can be obtained by pyroelectric coefficient formula
The pyroelectric coefficient of unit, pass through detection pyroelectric sensing unit parameter, it can be ensured that the consistency of pyroelectric sensing unit and
Reliability improves the qualification rate of product.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (6)
1. a kind of pyroelectric sensing unit testing machine, which is characterized in that including thermostatic platform, constant temperature system, thermoelectric ceramics refrigerator,
Constant temperature system and thermoelectric ceramics refrigerator, institute are arranged on the thermostatic platform for testing and control case and LCR tester and voltage tester
It states pyroelectric sensing unit and is placed in thermostatic platform, the pyroelectric sensing unit and testing and control case are electrically connected, and the LCR is surveyed
Instrument and oscillograph and testing and control case are tried by being electrically connected, the external bipolar power supply of thermoelectric ceramics refrigerator is described double
Polarity power cools down to thermoelectric ceramics refrigerator to thermostatic platform, and the constant temperature system makes thermostatic platform temperature keep stablizing.
2. pyroelectric sensing unit testing machine as described in claim 1, which is characterized in that the thermostatic platform top is equipped with metal
Piece, the pyroelectric sensing unit are placed in gauge sheet metal upper.
3. pyroelectric sensing unit testing machine as claimed in claim 2, which is characterized in that the sheet material is copper.
4. pyroelectric sensing unit testing machine as claimed in claim 2, which is characterized in that the constant temperature system include pond and
Circulation waterway, the pond be set to sheet metal below, the pond by circulation waterway make the water in pond keep flow and with
External source swaps.
5. pyroelectric sensing unit testing machine as claimed in claim 4, which is characterized in that the water being recycled in the pond
Source is salt water.
6. pyroelectric sensing unit testing machine as described in any one in claim 1-5, which is characterized in that the voltage tester
For oscillograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820687344.8U CN208125846U (en) | 2018-05-09 | 2018-05-09 | pyroelectric sensing unit testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820687344.8U CN208125846U (en) | 2018-05-09 | 2018-05-09 | pyroelectric sensing unit testing machine |
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| CN208125846U true CN208125846U (en) | 2018-11-20 |
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| CN201820687344.8U Active CN208125846U (en) | 2018-05-09 | 2018-05-09 | pyroelectric sensing unit testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884491A (en) * | 2019-02-22 | 2019-06-14 | 桂林电子科技大学 | Test device for semiconductor thermoelectric refrigeration device |
-
2018
- 2018-05-09 CN CN201820687344.8U patent/CN208125846U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884491A (en) * | 2019-02-22 | 2019-06-14 | 桂林电子科技大学 | Test device for semiconductor thermoelectric refrigeration device |
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