CN102013196A - Pyroelectricity infrared sensing tester - Google Patents
Pyroelectricity infrared sensing tester Download PDFInfo
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- CN102013196A CN102013196A CN 201010150423 CN201010150423A CN102013196A CN 102013196 A CN102013196 A CN 102013196A CN 201010150423 CN201010150423 CN 201010150423 CN 201010150423 A CN201010150423 A CN 201010150423A CN 102013196 A CN102013196 A CN 102013196A
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- infrared sensing
- pyroelectricity
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Abstract
The invention relates to a pyroelectricity infrared sensing tester, comprising a pyroelectricity infrared sensing tester mainframe, an infrared radiation light source, two pyroelectricity sensing modules, a pedestal disc with angle scale, and a scale, wherein the pyroelectricity infrared sensing tester mainframe comprises a four-digit display voltmeter, a voltage regulation knob, a function selection switch, a signal input and output port, a power output port, a highlight LED (Light Emitting Diode), and an internal amplification and control circuit. Through correctly measuring the two pyroelectricity sensing modules, the tester ensures that the students can better understand and master the theory and the application of pyroelectricity sensors. The tester has the advantages of rational structure, convenience in operation and good teaching effect, and is suitable for the teaching tests of the courses such as physics, optics, optoelectronics and the like in universities and colleges.
Description
Technical field
The present invention relates to a kind of rpyroelectric infrared sensing experiment instrument, belong to course teaching experimental apparatus technical fields such as physics, optics, optoelectronics.
Background technology
Thermoelectric Infrared Sensor is a kind of new type of high sensitivity detecting element.It can detect the variation of the infrared energy of extraneous radiation with non-contacting form, and can convert thereof into voltage signal output.This output voltage signal is amplified, then can be driven various control circuits, extensively just be used for aspects such as switch control, anti-theft fireproof warning, automatic observation.
The thermoelectric unit of pyroelectric infrared sensor inside is made up of cooperation filter glass windows such as the ferrotitanium lead plumbate mercury pottery of high Seebeck coefficient and lithium tantalate, sulfuric acid three Gan Tie.With the first differential concatenation of thermoelectricity or be connected into the differential balance circuit mode, change and be converted into electric signal output thereby can detect infrared energy that object emits in the noncontact mode.For the infrared radiation that is radiated to sensor, pyroelectric sensor adds in the thermoelectric unit after by the Fresnel lens that is installed in the sensor front it being focused on, thereby makes the sensor output voltage signal.
Development with teaching, the experimental teaching of colleges and universities not only requires experimental facilities that the experimental project of principle illustrative can be provided, also require to satisfy the student as much as possible simultaneously and carry out novelty experiment flexibly, cultivate the thinking and the manipulative ability of student's innovation, and existing existing pyroelectric sensor experimental apparatus can only provide the simple experiment of illustrative, but experiment content is few, can not accurately reflect the principle and the rule of pyroelectric infrared sensor.
Summary of the invention
This pyroelectric infrared sensor experiment instrument is at the not high and monistic shortcoming of the existing accuracy of existing experiment instrument, proposes a kind of base disk and rule that comprises rpyroelectric infrared sensing experiment instrument main frame and can change infrared light supply, two kinds of pyroelectricity sensing modules of infrared intensity and have a scale and forms; Rpyroelectric infrared sensing experiment instrument main frame comprises voltage table and voltage-regulation knob, functional select switch, the input and output port of signal and the amplification and the control circuit of power supply output and highlighted LED and inside that four figures shows.Can satisfy the experimental teaching requirement of the course such as physics, optics, optoelectronics of institution of higher learning.
The rule of this pyroelectric infrared sensor experiment instrument can rotate around the central shaft of sensing module, and can read the anglec of rotation and read distance value by rule by the angle index of base disk.In the infrared sensing experiment of finishing single thermoelectric unit, can change the radiation intensity of infraluminescence light source by the regulation voltage knob, simultaneously can accurately read radiating light source and pyroelectric sensor distance, the voltage strength that the measuring radiation radiation of light source produces and the relation of distance by the scale ruler.When the rpyroelectric infrared sensing modules with two thermoelectric units experimentize, by the rotation of rule, drive the infrared radiating light source movement, accurate reading angular on base disk, the while is read distance on rule.Can study detection viewing field and the distance of pyroelectric sensor to the motion radiation source.
Two kinds of rpyroelectric infrared sensing modules that the present invention adopts, be respectively single thermoelectric unit and two thermoelectric first sensing module, in the first sensing module of two thermoelectricity, dismountable Fresnel lens is arranged, by the comparison of two kinds of disparate modules experiments, can deepen the understanding of radiant heat source and moving heat sources to two kinds of sensing module Different Effects.Grasp the difference of different infrared sensing module application.And, understand the effect of Fresnel lens by the experiment of Fresnel lens dismounting is compared.
Sensing experiment instrument of the present invention has infra red radiation light source, and can change the radiation intensity of infrared light by the voltage-regulation knob.Experiment instrument has two kinds of way of outputs simultaneously, the variation of digitized voltage can be shown by highlighted LED, can signal be imported oscillograph by the oscillograph delivery outlet of signal simultaneously, accurately observes the variation of sensing voltage waveform.
Scale base disk and rule in the sensing experiment instrument of the present invention are made with hard materials such as stainless steels; angle and distance scale is accurately arranged above; simultaneously having bayonet slot in the base of infra red radiation light source combines closely with rule; and have soft Improved mat, in order to guarantee the scale mark of stable slip and protection rule.
Description of drawings
Fig. 1 is the rpyroelectric infrared sensing experiment instrument, among Fig. 11 is rpyroelectric infrared sensing experiment instrument main frame, the 2nd, four figures shows voltage table, the 3rd, power light, the 4th, signal input port, the 5th, voltage-regulation knob, the 6th, functional select switch, the 7th, power output, the 8th, the oscillograph output port of signal, the 9th, highlighted led state lamp.
Fig. 2 is the external measurement device of infrared sensing experiment instrument, and wherein 10 is rpyroelectric infrared sensing modules, the 11st, and Fresnel lens, the 12nd, have the chassis of angle index, the 13rd, rule, the 14th, infra red radiation light source, the 15th, infra red radiation light source base.
Fig. 3 is an infraluminescence light source base structure, and wherein 16 is the base Improved mat.
Fig. 4 is that signal amplifies and comparator circuit.
Embodiment
The infrared sensing device of two thermoelectric units of this rpyroelectric infrared sensing experiment instrument can realize that the infrared sensing device of single thermoelectric unit can be realized with devices such as PMS11 with devices such as P2288.
The infra red radiation light source that this rpyroelectric infrared sensing experiment instrument is adopted can realize that the highlighted LED of the ruddiness that is adopted can be the LED of models such as 5308URC with equipment such as HN5WXC.
Functional select switch in the infrared sensing experiment instrument main frame mainly is used in when using different infrared sensing modules in order to switch internal circuit.
Because the signal voltage of pyroelectric infrared sensor output is very faint, so signal needs amplifying circuit to amplify, the amplifying circuit of this rpyroelectric infrared sensing experiment instrument by 9013 and CA3140 form two-stage and amplify and realize, first order triode amplifies employing common emitter connection, with about 100 times of voltage amplifications; Second level operational amplifier amplifies 100 times again with the output voltage that triode amplifies the back collector, obtain the gain of about 70dB, this moment is at the voltage signal of a nearly 10V of the OUT of second level amplifier CA3140 end output, the voltage comparison amplifier of compositions such as this voltage input CA3140 is compared and enlarged, make unsettled simulating signal after relatively, become a stable signal.But when the static state of circuit is adjusted, answer regulator potentiometer R16, make the OUT end of comparer be output as low level earlier.
Claims (6)
1. rpyroelectric infrared sensing experiment instrument is characterized in that: the base disk (12) and the rule (13) that comprise rpyroelectric infrared sensing experiment instrument main frame (1) and infraluminescence light source (14), two kinds of pyroelectricity sensing modules and have a scale are formed; Rpyroelectric infrared sensing experiment instrument main frame (1) comprises that input port (4), signal output port (8) and the power supply of voltage table (2) that four figures shows and voltage-regulation knob (5), functional select switch (6), signal export (7), and the amplification and the control circuit of highlighted LED (9) and inside.
2. rpyroelectric infrared sensing experiment instrument according to claim 1 is characterized in that: rule (13) can rotate around the central shaft of sensing module, and can read the anglec of rotation and read distance value by rule by the angle index of base disk (12).
3. rpyroelectric infrared sensing experiment instrument according to claim 1 is characterized in that: two kinds of pyroelectricity sensing modules that adopted are respectively the sensing module of single thermoelectric unit and two thermoelectric units.
4. rpyroelectric infrared sensing experiment instrument according to claim 1 is characterized in that: have dismountable Fresnel lens (11) in the pyroelectricity sensing module of two thermoelectric units.
5. rpyroelectric infrared sensing experiment instrument according to claim 1 is characterized in that: have infra red radiation light source (14), and can change the radiation intensity of infrared light by voltage-regulation knob (5).
6. rpyroelectric infrared sensing experiment instrument according to claim 1 is characterized in that: have bayonet slot in the infra red radiation light source base (15) and combine with rule, and have soft Improved mat (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010150423 CN102013196A (en) | 2010-04-16 | 2010-04-16 | Pyroelectricity infrared sensing tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010150423 CN102013196A (en) | 2010-04-16 | 2010-04-16 | Pyroelectricity infrared sensing tester |
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| CN102013196A true CN102013196A (en) | 2011-04-13 |
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| CN 201010150423 Pending CN102013196A (en) | 2010-04-16 | 2010-04-16 | Pyroelectricity infrared sensing tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606863A (en) * | 2015-12-22 | 2016-05-25 | 华立科技股份有限公司 | Anti-theft electricity meter based on infrared induction |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521598Y (en) * | 2002-01-28 | 2002-11-20 | 上海大学 | Passive infrared sensing experimental instrument |
| CN2625867Y (en) * | 2003-06-05 | 2004-07-14 | 华中科技大学 | Intelligent heat radiation and infrared scanning imaging integrated experimental apparatus |
-
2010
- 2010-04-16 CN CN 201010150423 patent/CN102013196A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521598Y (en) * | 2002-01-28 | 2002-11-20 | 上海大学 | Passive infrared sensing experimental instrument |
| CN2625867Y (en) * | 2003-06-05 | 2004-07-14 | 华中科技大学 | Intelligent heat radiation and infrared scanning imaging integrated experimental apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 《物理实验》 20020831 熊建国等 被动式(热释电)红外传感实验 9-11 1-6 第22卷, 第8期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606863A (en) * | 2015-12-22 | 2016-05-25 | 华立科技股份有限公司 | Anti-theft electricity meter based on infrared induction |
| CN105606863B (en) * | 2015-12-22 | 2018-04-20 | 华立科技股份有限公司 | A kind of anti-theft electricity meter based on infrared induction |
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Application publication date: 20110413 |