CN208337948U - A kind of linear constant current LED lamp circuit with radar sensor - Google Patents
A kind of linear constant current LED lamp circuit with radar sensor Download PDFInfo
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- CN208337948U CN208337948U CN201820860292.XU CN201820860292U CN208337948U CN 208337948 U CN208337948 U CN 208337948U CN 201820860292 U CN201820860292 U CN 201820860292U CN 208337948 U CN208337948 U CN 208337948U
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Abstract
The linear constant current LED lamp circuit with radar sensor that the utility model discloses a kind of, including radar sensor, LED illuminating circuit, first linear constant current circuit, voltage conversion circuit, full bridge rectifier and the second linear constant current circuit, the output end of full bridge rectifier, the input terminal of voltage conversion circuit, the positive input terminal of LED illuminating circuit and the connection of the input terminal of the first linear constant current circuit, the output end of voltage conversion circuit, the input terminal of radar sensor and the connection of the ground terminal of the second linear constant current circuit, the connection of the control terminal of the output end of radar sensor and the first linear constant current circuit, the output end of second linear constant current circuit, the output end of first linear constant current circuit is connected with the negative input end of LED illuminating circuit；Advantage is that structure is simple, cost is relatively low, and meets with marginal illumination brightness requirement occasion.
Description
Technical field
The utility model relates to a kind of linear constant current LED lamp circuits, more particularly, to a kind of with the linear of radar sensor
Constant current LED lamp circuit.
Background technique
Currently, the linear constant current LED lamp circuit with radar sensor by radar sensor constantly emit microwave signal,
Receive microwave signal detects nearby whether there is the case where moving object with microwave signal is compared, and then exports different states
Signal controls the working condition of linear constant current LED lamp circuit.Since microwave signal has the characteristic for penetrating nonmetallic substance, thunder
It may be mounted at up to sensor in closed space, do not interfere with the design of linear constant current LED lamp circuit, thus band thunder
Linear constant current LED lamp circuit up to sensor is used more and more widely.
A kind of structure of existing linear constant current LED lamp circuit with radar sensor is as shown in Figure 1.Band radar sensing
The linear constant current LED lamp circuit of device includes AC to DC converter circuit, switched-mode power supply circuit, radar sensor, linear constant current electricity
Road and LED illuminating circuit.AC to DC converter circuit is according to firewire input terminal, zero curve input, output end and ground terminal；Switch
Type power circuit has input, output end and ground terminal；Radar sensor has input, output end and ground terminal；Linearly
Constant-current circuit has input terminal, output end, control terminal and ground terminal, and LED illuminating circuit has positive input terminal and negative input end.It hands over
The firewire input terminal of circulation DC circuit is used to access the firewire of alternating current, and zero curve input terminal is used to access the zero curve of alternating current；Exchange
Turn the output end of DC circuit, the positive input terminal of LED illuminating circuit, the input terminal of switched-mode power supply circuit and linear constant current circuit
Input terminal connection；The output end of switched-mode power supply circuit is connected with the input terminal of radar sensor；The output of radar sensor
End is connected with the control terminal of linear constant current circuit；The output end of linear constant current circuit is connected with the negative input end of LED illuminating circuit；
The ground terminal of AC to DC converter circuit, the ground terminal of switched-mode power supply circuit, the ground terminal of radar sensor and linear constant current electricity
The ground terminal on road connects.
In the above-mentioned linear constant current LED lamp circuit with radar sensor, switched-mode power supply circuit is to use step-down switching power supply
Circuit theory DC high voltage is converted to a kind of circuit of DC low-voltage, although its power supply conversion effect with higher
Rate, but element used in switched-mode power supply circuit is more, and structure is complicated, higher cost, in addition the above-mentioned line with radar sensor
Property constant current LED lamp circuit in, when radar sensor detects someone, linear constant current circuit control LED illuminating circuit illumination, detection
When to nobody, linear constant current circuit controls LED illuminating circuit and extinguishes, and can not be suitable for warehouse and underground garage etc. and need to monitor,
Occasion with marginal illumination brightness requirement.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of structures simply, cost is relatively low, and meets with most
Low brightness of illumination requires the linear constant current LED lamp circuit with radar sensor of occasion.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of linear perseverance with radar sensor
LED lamp circuit is flowed, including radar sensor, LED illuminating circuit and the first linear constant current circuit, the radar sensor have
Input, output end and ground terminal, first linear constant current circuit have input terminal, control terminal, output and ground,
The LED illuminating circuit has positive input terminal and negative input end, and the linear constant current LED lamp circuit further includes voltage transformation
Circuit, full bridge rectifier and the second linear constant current circuit, the voltage conversion circuit have input, output end and ground connection
End, second linear constant current circuit have ground terminal and output end, the full bridge rectifier have firewire input terminal,
Zero curve input, output end and ground terminal, the firewire input terminal of the full bridge rectifier are used to connect the firewire of alternating current, institute
The zero curve input terminal for the full bridge rectifier stated is used to connect the zero curve of alternating current, the output end of the full bridge rectifier, institute
The input terminal for the voltage conversion circuit stated, the positive input terminal of the LED illuminating circuit and first linear constant current circuit
Input terminal connection, the output end of the voltage conversion circuit, the input terminal of the radar sensor and described second
The ground terminal of linear constant current circuit connects, the control of the output end of the radar sensor and first linear constant current circuit
End processed connection, the output end of second linear constant current circuit, the output end of first linear constant current circuit and described
LED illuminating circuit negative input end connection, the ground connection of the ground terminal of the radar sensor, the LED illuminating circuit
End, the ground terminal of first linear constant current circuit, the ground terminal of the voltage conversion circuit and the full-bridge rectification
The ground terminal of circuit connects.
The voltage conversion circuit includes first capacitor, the second capacitor, first diode, the second diode and the three or two
Pole pipe, the first capacitor and second capacitor are electrolytic capacitor, the first diode and described second
Diode is rectifier diode, and the third diode is unidirectional TVS diode, the just extremely institute of the first capacitor
The input terminal for the voltage conversion circuit stated, the cathode of second diode, the cathode of the third diode and described
The second capacitor anode connection and its connecting pin be the voltage conversion circuit output end, the first capacitor it is negative
The anode connection of pole, the cathode of the first diode and second diode, the anode of the first diode,
The anode of the third diode is connected with the cathode of second capacitor and its connecting pin is the voltage transformation electricity
The ground terminal on road.Biggish voltage can be converted to smooth voltage by the fluctuation that full bridge rectifier exports by the circuit, simultaneously
Working power is provided for the second constant-current circuit and radar sensor, and cost is relatively low.
First linear constant current circuit includes the first linear of first resistor, second resistance and model SM2083E
Constant current chip, one end of the second resistance are the input terminal of first linear constant current circuit, and described first is linear
8th foot of constant current chip is the output end of first linear constant current circuit, the 4th foot of the linear constant current chip of described first
For the control terminal of first linear constant current circuit, the other end of the second resistance and the first linear constant current core
1st foot of piece connects, and one end of the first resistor is connected with the 5th foot of the described first linear constant current chip, described
The other end of first resistor is connected with the 3rd foot of the described first linear constant current chip and its connecting pin is described first linear
The ground terminal of constant-current circuit.
Second linear constant current circuit include the second linear constant current chip of model SM2082G, 3rd resistor and
4th diode, the 4th diode are rectifier diode, the second just extremely described line of the 4th diode
The output end of property constant-current circuit, the cathode of the 4th diode are connected with the 1st foot of the second linear constant current chip,
3rd foot of the second linear constant current chip is connected with one end of the 3rd resistor, the 3rd resistor it is another
End is connected with the 2nd foot of the second linear constant current chip and its connecting pin is the ground connection of second linear constant current circuit
End.The brightness of lamp when the circuit adjustable surrounding nobody, while part work can be provided again for radar sensor
Electric current.
The full bridge rectifier includes full bridge rectifier bridge heap, and the 1st foot of the full bridge rectifier bridge heap is described
The firewire input terminal of full bridge rectifier, the 3rd foot of the full bridge rectifier bridge heap are the zero curve of the full bridge rectifier
Input terminal, the 2nd foot of the full bridge rectifier bridge heap are the output end of the full bridge rectifier, the full bridge rectifier bridge
4th foot of heap is the ground terminal of the full bridge rectifier.
Compared with prior art, the utility model has the advantage of matching by full bridge rectifier and voltage conversion circuit
Conjunction is for the usually used AC to DC converter circuit being made of full bridge rectifier and voltage smoothing circuit and switching mode electricity
The cooperation of source circuit provides operating voltage, thus simplifies circuit structure, reduces cost, in addition increases by second linear constant current electricity
Road keeps LED illuminating circuit to light, provides the operating voltage and electric current of radar sensor using this second linear constant current circuit,
When external city is electrically accessed, the output end of the second linear constant current circuit has always constant current output, at this point, if radar senses
Device monitors people, and radar sensor sends ON signal to the first linear constant current circuit, and the output end of the first linear constant current circuit has
Electric current output, the operating current of LED illuminating circuit is the output electric current and the second linear constant current circuit of the first linear constant current circuit
The sum of output electric current, normal illumination light is issued, if radar sensor monitoring, less than people, radar sensor sends OFF signal
To the first linear constant current circuit, the output electric current of the first linear constant current circuit output end is zero at this time, is in close state, LED
The operating current of illuminating circuit is only the low current of the second linear constant current circuit output end output, and the brightness of LED illuminating circuit is
Marginal illumination light；The utility model requires the characteristics of lighting using LED illuminating circuit under any circumstance, obtains LED hair
The electric current and LED illuminating circuit that optical circuit flows through the second linear constant current circuit in low-light level are at work to voltage conversion circuit
The electric current of charging, provide radar sensor needs operating voltage and electric current, thus the utility model has the advantages of simple structure, cost compared with
It is low, and meet with marginal illumination brightness requirement occasion.
Detailed description of the invention
Fig. 1 is the structural principle block diagram of the existing linear constant current LED lamp circuit with radar sensor；
Fig. 2 is the structural principle block diagram of the linear constant current LED lamp circuit with radar sensor of the utility model；
Fig. 3 is the circuit diagram of the linear constant current LED lamp circuit with radar sensor of the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment one: as shown in Fig. 2, a kind of linear constant current LED lamp circuit with radar sensor, including radar sensing
Device, LED illuminating circuit and the first linear constant current circuit, radar sensor have input, output end and ground terminal, and first is linear
Constant-current circuit has input terminal, control terminal, output and ground, and LED illuminating circuit has positive input terminal and negative input end, line
Property constant current LED lamp circuit further includes voltage conversion circuit, full bridge rectifier and the second linear constant current circuit, voltage conversion circuit
With input, output end and ground terminal, the second linear constant current circuit has ground terminal and output end, and full bridge rectifier has
Firewire input terminal, zero curve input, output end and ground terminal, the firewire input terminal of full bridge rectifier are used to connect the fire of alternating current
Line, the zero curve input terminal of full bridge rectifier are used to connect the zero curve of alternating current, output end, the voltage transformation electricity of full bridge rectifier
The input terminal of the input terminal on road, the positive input terminal of LED illuminating circuit and the first linear constant current circuit connects, voltage conversion circuit
The ground terminal of output end, the input terminal of radar sensor and the second linear constant current circuit connects, the output end of radar sensor and
The control terminal of first linear constant current circuit connects, the output of the output end of the second linear constant current circuit, the first linear constant current circuit
End is connected with the negative input end of LED illuminating circuit, and the ground terminal of radar sensor, the ground terminal of LED illuminating circuit, first are linearly
Ground terminal, the ground terminal of voltage conversion circuit of constant-current circuit are connected with the ground terminal of full bridge rectifier.
Embodiment two: as shown in Figures 2 and 3, a kind of linear constant current LED lamp circuit with radar sensor, including radar
Sensor, LED illuminating circuit and the first linear constant current circuit, radar sensor have input, output end and ground terminal, first
Linear constant current circuit has input terminal, control terminal, output and ground, and LED illuminating circuit has positive input terminal and negative input
End, linear constant current LED lamp circuit further include voltage conversion circuit, full bridge rectifier and the second linear constant current circuit, and voltage becomes
Circuit is changed with input, output end and ground terminal, the second linear constant current circuit has ground terminal and output end, full-bridge rectification electricity
Road has firewire input terminal, zero curve input, output end and ground terminal, and the firewire input terminal of full bridge rectifier is for connecting city
The firewire of electricity, the zero curve input terminal of full bridge rectifier are used to connect the zero curve of alternating current, output end, the voltage of full bridge rectifier
The input terminal of the input terminal of translation circuit, the positive input terminal of LED illuminating circuit and the first linear constant current circuit connects, voltage transformation
The ground terminal of the output end of circuit, the input terminal of radar sensor and the second linear constant current circuit connects, radar sensor it is defeated
Outlet is connected with the control terminal of the first linear constant current circuit, the output end of the second linear constant current circuit, the first linear constant current circuit
Output end connected with the negative input end of LED illuminating circuit, the ground terminal of radar sensor, the ground terminal of LED illuminating circuit,
Ground terminal, the ground terminal of voltage conversion circuit of one linear constant current circuit are connected with the ground terminal of full bridge rectifier.
In the present embodiment, voltage conversion circuit includes first capacitor C1, the second capacitor C2, first diode D1, the two or two
Pole pipe D2 and third diode D3, first capacitor C1 and the second capacitor C2 are electrolytic capacitor, first diode D1 and the two or two
Pole pipe D2 is rectifier diode, and third diode D3 is unidirectional TVS diode, the just extremely voltage transformation electricity of first capacitor C1
The anode of the input terminal on road, the cathode of the second diode D2, the cathode of third diode D3 and the second capacitor C2 connects and it connects
Meet the output end that end is voltage conversion circuit, the cathode of first capacitor C1, the cathode of first diode D1 and the second diode D2
Anode connection, the anode of first diode D1, the anode of third diode D3 and the second capacitor C2 cathode connection and its connect
Connect the ground terminal that end is voltage conversion circuit.
In the present embodiment, the first linear constant current circuit includes first resistor R1, second resistance R2 and model SM2083E
One end of first linear constant current chip U1, second resistance R2 are the input terminal of the first linear constant current circuit, the first linear constant current core
The 8th foot of piece U1 is the output end of the first linear constant current circuit, and the 4th foot of the first linear constant current chip U1 is the first linear constant current
The 1st foot of the control terminal of circuit, the other end of second resistance R2 and the first linear constant current chip U1 connect, and the one of first resistor R1
End is connected with the 5th foot of the first linear constant current chip U1, and the 3rd of the other end of first resistor R1 and the first linear constant current chip U1 the
Foot connection and its connecting pin are the ground terminal of the first linear constant current circuit.
In the present embodiment, the second linear constant current circuit includes the second linear constant current chip U2 of model SM2082G, third
Resistance R3 and the 4th diode D4, the 4th diode D4 are rectifier diode, and just extremely the second of the 4th diode D4 is linear permanent
The 1st foot of the output end of current circuit, the cathode of the 4th diode D4 and the second linear constant current chip U2 connect, the second linear constant current
The 3rd foot of chip U2 is connected with one end of 3rd resistor R3, the other end of 3rd resistor R3 and the second linear constant current chip U2's
The connection of 2nd foot and its connecting pin are the ground terminal of the second linear constant current circuit.
In the present embodiment, full bridge rectifier includes full bridge rectifier bridge heap Db, and the 1st foot of full bridge rectifier bridge heap Db is full-bridge
The firewire input terminal of rectification circuit, the 3rd foot of full bridge rectifier bridge heap Db are the zero curve input terminal of full bridge rectifier, full-bridge rectification
The 2nd foot of bridge heap Db is the output end of full bridge rectifier, and the 4th foot of full bridge rectifier bridge heap Db is the ground connection of full bridge rectifier
End.
Claims (5)
1. a kind of linear constant current LED lamp circuit with radar sensor, including radar sensor, LED illuminating circuit and First Line
Property constant-current circuit, the radar sensor has input, output end and ground terminal, the described first linear constant current circuit tool
There are input terminal, control terminal, output and ground, the LED illuminating circuit has positive input terminal and negative input end, feature
It is that the linear constant current LED lamp circuit further includes voltage conversion circuit, full bridge rectifier and the second linear constant current circuit,
The voltage conversion circuit has input, output end and ground terminal, and second linear constant current circuit has ground terminal
And output end, the full bridge rectifier have firewire input terminal, zero curve input, output end and ground terminal, described is complete
The firewire input terminal of bridge rectification circuit is used to connect the firewire of alternating current, and the zero curve input terminal of the full bridge rectifier is for connecting
Connect the zero curve of alternating current, the output end of the full bridge rectifier, the input terminal of the voltage conversion circuit, the LED
The positive input terminal of illuminating circuit is connected with the input terminal of first linear constant current circuit, the voltage conversion circuit it is defeated
Outlet, the radar sensor input terminal connected with the ground terminal of second linear constant current circuit, the radar
The output end of sensor is connected with the control terminal of first linear constant current circuit, second linear constant current circuit it is defeated
Outlet, first linear constant current circuit output end connected with the negative input end of the LED illuminating circuit, the thunder
Up to the ground terminal of sensor, the ground terminal of the LED illuminating circuit, the ground terminal of first linear constant current circuit, institute
The ground terminal for the voltage conversion circuit stated is connected with the ground terminal of the full bridge rectifier.
2. a kind of linear constant current LED lamp circuit with radar sensor according to claim 1, it is characterised in that described
Voltage conversion circuit includes first capacitor, the second capacitor, first diode, the second diode and third diode, and described
One capacitor and second capacitor are electrolytic capacitor, and the first diode and second diode are rectification
Diode, the third diode are unidirectional TVS diode, the just extremely described voltage transformation electricity of the first capacitor
The input terminal on road, the cathode of second diode, the cathode of the third diode and second capacitor are just
Pole connection and its connecting pin are the output end of the voltage conversion circuit, the cathode of the first capacitor, described first
The anode connection of the cathode of diode and second diode, positive, described the three or two of the first diode
The anode of pole pipe is connected with the cathode of second capacitor and its connecting pin is the ground terminal of the voltage conversion circuit.
3. a kind of linear constant current LED lamp circuit with radar sensor according to claim 1, it is characterised in that described
First linear constant current circuit includes the first linear constant current chip of first resistor, second resistance and model SM2083E, described
One end of second resistance is the input terminal of first linear constant current circuit, the 8th foot of the linear constant current chip of described first
For the output end of first linear constant current circuit, the 4th foot of the linear constant current chip of described first is the First Line
The control terminal of property constant-current circuit, the other end of the second resistance are connected with the 1st foot of the described first linear constant current chip,
One end of the first resistor is connected with the 5th foot of the described first linear constant current chip, the first resistor it is another
End is connected with the 3rd foot of the first linear constant current chip and its connecting pin is the ground connection of first linear constant current circuit
End.
4. a kind of linear constant current LED lamp circuit with radar sensor according to claim 1, it is characterised in that described
Second linear constant current circuit includes the second linear constant current chip, 3rd resistor and the 4th diode of model SM2082G, described
The 4th diode be rectifier diode, the output of the second just extremely described linear constant current circuit of the 4th diode
End, the cathode of the 4th diode are connected with the 1st foot of the second linear constant current chip, and described second is linear permanent
3rd foot of stream chip is connected with one end of the 3rd resistor, the other end of the 3rd resistor and second line
Property constant current chip the 2nd foot connection and its connecting pin be second linear constant current circuit ground terminal.
5. a kind of linear constant current LED lamp circuit with radar sensor according to claim 1, it is characterised in that described
Full bridge rectifier includes full bridge rectifier bridge heap, and the 1st foot of the full bridge rectifier bridge heap is the full bridge rectifier
Firewire input terminal, the 3rd foot of the full bridge rectifier bridge heap are the zero curve input terminal of the full bridge rectifier, and described is complete
2nd foot of bridge rectifier bridge stack is the output end of the full bridge rectifier, and the 4th foot of the full bridge rectifier bridge heap is described
Full bridge rectifier ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820860292.XU CN208337948U (en) | 2018-06-05 | 2018-06-05 | A kind of linear constant current LED lamp circuit with radar sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820860292.XU CN208337948U (en) | 2018-06-05 | 2018-06-05 | A kind of linear constant current LED lamp circuit with radar sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337948U true CN208337948U (en) | 2019-01-04 |
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ID=64772727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820860292.XU Active CN208337948U (en) | 2018-06-05 | 2018-06-05 | A kind of linear constant current LED lamp circuit with radar sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208337948U (en) |
-
2018
- 2018-06-05 CN CN201820860292.XU patent/CN208337948U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200311 Address after: 322009 NO.901, Longqi Road, Suxi Town, Yiwu City, Jinhua City, Zhejiang Province Patentee after: Harmony Mingxin (Yiwu) Photoelectric Technology Co., Ltd Address before: 312071 Zhejiang province Shaoxing Paojiang Industrial Zone No. 308 North Road in the robe Patentee before: Xinhe (Shaoxing) Green Lighting Co., Ltd. |
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| TR01 | Transfer of patent right |