CN206787725U - Clamp device and inductor for pyroelectric infrared human body inductor - Google Patents
Clamp device and inductor for pyroelectric infrared human body inductor Download PDFInfo
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- CN206787725U CN206787725U CN201720682561.3U CN201720682561U CN206787725U CN 206787725 U CN206787725 U CN 206787725U CN 201720682561 U CN201720682561 U CN 201720682561U CN 206787725 U CN206787725 U CN 206787725U
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Abstract
The utility model discloses a kind of clamp device for pyroelectric infrared human body inductor, the clamp device includes rpyroelectric infrared detection unit, the late-class circuit being connected with rpyroelectric infrared detection unit, and at least two input/output terminal being connected with late-class circuit, between rpyroelectric infrared detection unit output end and late-class circuit, increase clamp circuit.Correspondingly, the invention also discloses a kind of pyroelectric infrared human body inductor using the clamp device.Using clamp device provided by the utility model or inductor so that the output terminal potential of pyroelectric sensor avoids damage to late-class circuit in safety and suitable scope, allows the circuit of rear class or inductor to be in normal operating conditions all the time.
Description
Technical field
The utility model is related to sensor field, and in particular to for pyroelectric infrared human body inductor clamp device and
Inductor.
Background technology
Pyroelectric infrared human body inductor is a kind of infrared signal sent using human body self heat, passes through pyroelectricity
Sensor is converted into faint electric signal, and this faint electric signal goes to realize various after the signal transacting such as amplifying, filtering
The device of control function.Pyroelectric infrared human body inductor applications field is very extensive, and it can quickly open all kinds of white heats automatically
The devices such as lamp, fluorescent lamp, buzzer, automatically-controlled door, electric fan, dryer and automatic hand washing sink, especially suitable for enterprise, hotel,
The sensitizing ranges such as market, the passageway of storehouse and family, corridor, or the automatic light for safety zone, illumination and warning system.
Such as：Human body inductive lamp -- have that thin and weak man is bright, people, which walks off to turn on light, goes out.
Fig. 1 is traditional pyroelectric infrared human body inductor schematic diagram, wherein 101 being infrared optics optical filter, 102 being outer
Shell, 103 be infrared-sensitive material element (2 sensitive material elements are connected with opposite polarity in this example), 104 be resistance, 105
It is the first input/output terminal for FET, 106,107 be the second input/output terminal, 108 is the 3rd input/output terminal.Its work
Principle is that the infrared ray that human body is sent reaches infrared-sensitive material element by infrared optics optical filter, is converted into electric signal,
Analog signal is exported after FET impedance transformation, wherein resistance acts charge effect of releasing.
With the fast development of integrated circuit technique, numeric type pyroelectric infrared human body inductor, its structure have also appeared
As shown in Fig. 2 wherein 201 it is infrared optics optical filter, 202 is shell, 203 is infrared-sensitive material element (by 2 in this example
Sensitive material element is connected with opposite polarity), 204 be late-class circuit, 205 be the first input/output terminal, 206 be that the second input is defeated
Go out end, it is also possible to there are multiple input/output terminals such as the 3rd input/output terminal, the 4th input/output terminal.Its operation principle is human body hair
The infrared ray gone out reaches infrared-sensitive material element by infrared optics optical filter, electric signal is converted into, after being then input to
Go to be handled in signal processing module in level circuit, main methods generally comprise passes through analog-digital converter by signal
ADC is converted into data signal, and signal processing module can also have digital filtering function, therefore, with above-mentioned traditional rpyroelectric infrared
Human inductor is different, and the output of this pyroelectric infrared human body inductor is data signal.Although the signal transacting in inductor
Module typically has specialized circuitry and plays charge discharging resisting (resistance in the similar Fig. 1 of effect), but when infrared signal intensity or
During temperature jump, two terminal potentials of rpyroelectric infrared sensitive material element can be also mutated, when charge discharging resisting circuit has little time or not
When can act on, the normal range of operation of the circuit of rear class may be exceeded, cause late-class circuit distortion or pyroelectricity can not be identified
The useful signal of infrared-sensitive material element, or even late-class circuit can be damaged.
Utility model content
In view of the shortcomings of the prior art, main purpose of the present utility model is：For pyroelectric infrared human body inductor
When running into intensity or the temperature jump of infrared signal, late-class circuit distortion or rpyroelectric infrared sensitivity can not be identified that possibility triggers
The problem of useful signal of material elements, a kind of clamp device for pyroelectric infrared human body inductor is proposed, and correspondingly
Disclose a kind of pyroelectric infrared human body inductor.
To realize object defined above, the utility model discloses a kind of clamp dress for pyroelectric infrared human body inductor
Put, including rpyroelectric infrared detection unit, the late-class circuit being connected with rpyroelectric infrared detection unit, and at least two with after
The connected input/output terminal of level circuit, between rpyroelectric infrared detection unit output end and late-class circuit, increases clamp circuit.
Preferably, the late-class circuit includes signal processing module, and it is single that the clamp circuit is located at rpyroelectric infrared detection
Between member and signal processing module.
Preferably, the rpyroelectric infrared detection unit includes one or more infrared-sensitive material elements.
Preferably, the rpyroelectric infrared detection unit includes two infrared-sensitive material members with opposite polarity series connection
Part.
Preferably, the clamp circuit is realized using diode.
Preferably, the positive pole of the first diode connects one end of rpyroelectric infrared detection unit output in the clamp circuit,
Negative pole is grounded；The negative pole of second diode connects one end of rpyroelectric infrared detection unit output, plus earth；3rd diode
Positive pole connects the other end of rpyroelectric infrared detection unit output, negative pole ground connection；The negative pole of 4th diode connects rpyroelectric infrared inspection
Survey the other end of unit output, plus earth.
Correspondingly, the invention also discloses a kind of pyroelectric infrared human body inductor, including infrared optics optical filter
1st, shell 2, in addition to any clamp device for pyroelectric infrared human body inductor as described above.
Compared with prior art, the utility model has the advantage of：It is a kind of red for pyroelectricity disclosed in the utility model
The clamp device and inductor of outer human inductor so that the output terminal potential of pyroelectric sensor is in safety and suitable scope
It is interior, late-class circuit is avoided damage to, allows the circuit of rear class or inductor to be in normal operating conditions all the time.
Brief description of the drawings
Fig. 1 is traditional pyroelectric infrared human body inductor schematic diagram；
Fig. 2 is numeric type pyroelectric infrared human body inductor schematic diagram；
Fig. 3 is the clamp device structural representation for pyroelectric infrared human body inductor that the utility model embodiment provides
Figure；
Fig. 4 is the clamp device structure for pyroelectric infrared human body inductor that the utility model preferred embodiment provides
Figure；
Fig. 5 is that the pyroelectric infrared human body that is used for realized using diode that the utility model preferred embodiment provides is sensed
The clamp device schematic diagram of device；
Fig. 6 is the pyroelectric infrared human body sensor structure schematic diagram that the utility model preferred embodiment provides；
Fig. 7 is that the pyroelectric infrared human body using clamping diode circuit that the utility model preferred embodiment provides senses
Device structural representation.
Embodiment
In view of deficiency of the prior art, inventor is able to propose that this practicality is new through studying for a long period of time and largely putting into practice
The technical scheme of type.The technical scheme, its implementation process and principle etc. will be further explained as follows.
The utility model proposes the clamp device for pyroelectric infrared human body inductor, including rpyroelectric infrared detection
Unit, the late-class circuit being connected with rpyroelectric infrared detection unit, and at least two input and output being connected with late-class circuit
End, in order to avoid when the intensity of infrared signal or temperature jump, the both ends potential jump of rpyroelectric infrared sensitive material element
Caused late-class circuit distortion or the useful signal that pyroelectric sensor can not be identified, or even the problem of damage late-class circuit,
Between rpyroelectric infrared detection unit output end and late-class circuit, increase clamp circuit.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining this
Utility model, it is not used to limit the utility model.
Fig. 3 is the clamp device schematic diagram for pyroelectric infrared human body inductor that the utility model embodiment proposes,
Including rpyroelectric infrared detection unit 301, late-class circuit 303, it is connected between rpyroelectric infrared detection unit and late-class circuit
Clamp circuit 302, and the first input/output terminal 304 being connected with late-class circuit, the second input/output terminal 305.According to not
Same applicable cases, it is also possible to including the 3rd, the multiple input/output terminals of the fourth class.
One or more sensitive material elements are included inside rpyroelectric infrared detection unit, sensing component number is installed according to it
Amount number, be generally divided into unit piece, dual-element, four elements and special shape etc..The most common are dual-element type, as Fig. 1,
Two sensitive material elements are connected with opposite polarity shown in Fig. 2, this kind of connected mode is higher than unit except the energy of output
Outside part device, moreover it is possible to prevent the detection error caused by variation of ambient temperature.
Pyroelectric infrared sensor typically uses Digital Signal Processing, therefore, in late-class circuit generally comprises corresponding letter
Number processing module, in the clamp device described in the utility model embodiment, clamp circuit is placed in rpyroelectric infrared detection unit
Output end and signal processing module between so that the output terminal potential of infrared-sensitive material element is in safety and suitable scope
It is interior, the input termination mos gate pole situation of the late-class circuits such as signal processing module, particularly late-class circuit is avoided damage to, especially
Increase clamp circuit to protect MOS grid to be not damaged by, and allow the circuit of rear class in normal range of operation.
Fig. 4 is a kind of clamp device for pyroelectric infrared human body inductor that the utility model preferred embodiment provides
Structure chart, rpyroelectric infrared detection unit use dual-element form, two sensitive material elements are connected with opposite polarity, two
Increase corresponding clamp circuit respectively between the signal processing module of individual infrared-sensitive material cell output and late-class circuit, so as to
Make two terminal potentials of rpyroelectric infrared sensitive material element in safety and suitable scope, avoid damage to signal processing module with
And late-class circuit.
As a kind of better embodiment of the present utility model, clamp circuit can use diode to realize, as shown in figure 5,
Diode D1 positive pole connects one end of infrared-sensitive material element output, and diode D1 negative pole is grounded for clamping positive voltage；
Diode D2 negative pole connects one end of infrared-sensitive material element output, and diode D2 plus earth is used to clamp negative voltage；
Diode D3 positive pole connects the other end of infrared-sensitive material element output, and diode D3 negative pole is grounded for clamping positive electricity
Pressure；Diode D4 negative pole connects the other end of infrared-sensitive material element output, and diode D4 plus earth is negative for clamping
Voltage；By diode D1, diode D2, diode D3, diode D4 clamp, the output of infrared-sensitive material element can be made
Current potential more reliable can protect late-class circuit not to be damaged in certain scope, at the same this 4 diodes also have it is certain quiet
Electric protective action.
It should be noted that above schematic diagram is only used as specific embodiment of the present utility model, must not be considered as to this reality
With new limitation, it is made up of suitably adjustment element or circuit, such as the infrared sensor using other forms, use
Equivalent circuit of equivalent diode action etc. does not depart from the mode of the utility model design, should all be included in of the present utility model
Within protection domain.
Correspondingly, the utility model embodiment also discloses that a kind of pyroelectric infrared human body inductor, such as Fig. 6, Fig. 7 institute
Show, specifically include infrared optics optical filter 1, shell 2, and the clamp as described above for being used for pyroelectric infrared human body inductor
Device.The infrared ray that human body is sent reaches clamp device described in the utility model by infrared optics optical filter, in its device
Infrared-sensitive material element the infrared ray received is converted into electric signal, clamp circuit causes any change of infrared signal
All without causing the output voltage of rpyroelectric infrared detection unit to exceed working range, so as to avoid late-class circuit distortion or damage
Wound, it also ensure that human inductor can be all the time in stable working condition simultaneously.
It should be appreciated that above-described embodiment is only to illustrate technical concepts and features of the present utility model, it is ripe its object is to allow
Content of the present utility model can be understood and implement according to this by knowing the personage of technique, can not be limited with this of the present utility model
Protection domain.All equivalent change or modifications made according to the utility model Spirit Essence, should all cover of the present utility model
Within protection domain.
Claims (7)
1. a kind of clamp device for pyroelectric infrared human body inductor, including rpyroelectric infrared detection unit, with pyroelectricity
The connected late-class circuit of infrared detection unit, and at least two input/output terminals being connected with late-class circuit, it is characterised in that：
Between rpyroelectric infrared detection unit output end and late-class circuit, increase clamp circuit.
2. the clamp device according to claim 1 for pyroelectric infrared human body inductor, it is characterised in that：After described
Level circuit includes signal processing module, and the clamp circuit is between rpyroelectric infrared detection unit and signal processing module.
3. the clamp device according to claim 1 for pyroelectric infrared human body inductor, it is characterised in that：The heat
Releasing electric infrared detection unit includes one or more infrared-sensitive material elements.
4. the clamp device according to claim 3 for pyroelectric infrared human body inductor, it is characterised in that：The heat
Releasing electric infrared detection unit includes two infrared-sensitive material elements connected with opposite polarity.
5. any clamp device for pyroelectric infrared human body inductor according to Claims 1-4, its feature exist
In：The clamp circuit is realized using diode.
6. the clamp device according to claim 5 for pyroelectric infrared human body inductor, it is characterised in that：The pincers
The positive pole of the first diode connects one end of rpyroelectric infrared detection unit output, negative pole ground connection in the circuit of position；Second diode
Negative pole connects one end of rpyroelectric infrared detection unit output, plus earth；The positive pole of 3rd diode connects rpyroelectric infrared detection
The other end of unit output, negative pole ground connection；The negative pole of 4th diode connects the other end of rpyroelectric infrared detection unit output, just
Pole is grounded.
7. a kind of pyroelectric infrared human body inductor, including infrared optics optical filter (1), shell (2), it is characterised in that：Also wrap
Include any clamp device for pyroelectric infrared human body inductor as described in claim 1 to 6.
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| CN201720682561.3U CN206787725U (en) | 2017-06-13 | 2017-06-13 | Clamp device and inductor for pyroelectric infrared human body inductor |
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| CN201720682561.3U CN206787725U (en) | 2017-06-13 | 2017-06-13 | Clamp device and inductor for pyroelectric infrared human body inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063475A (en) * | 2017-06-13 | 2017-08-18 | 苏州华芯微电子股份有限公司 | Clamp device and inductor for pyroelectric infrared human body inductor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063475A (en) * | 2017-06-13 | 2017-08-18 | 苏州华芯微电子股份有限公司 | Clamp device and inductor for pyroelectric infrared human body inductor |
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Effective date of registration: 20180806 Address after: 215000 198 Xiangyang Road, Suzhou hi tech Zone, Jiangsu Co-patentee after: Ssba sensing Polytron Technologies Inc Patentee after: Suzhou Huaxin Microelectronics Co., Ltd. Address before: 215000 198 Xiangyang Road, Suzhou hi tech Zone, Jiangsu Patentee before: Suzhou Huaxin Microelectronics Co., Ltd. |