CN207820274U - fault detection circuit - Google Patents
fault detection circuit Download PDFInfo
- Publication number
- CN207820274U CN207820274U CN201820011850.5U CN201820011850U CN207820274U CN 207820274 U CN207820274 U CN 207820274U CN 201820011850 U CN201820011850 U CN 201820011850U CN 207820274 U CN207820274 U CN 207820274U
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- Prior art keywords
- fault detection
- comparator
- detection circuit
- detection unit
- diode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a kind of fault detection circuit comprising：Comparator and at least fault detection unit all the way being connected with the comparator；The comparator has threshold voltage, it is described that at least fault detection unit is connected with the input terminal of the comparator all the way, voltage signal from the fault detection unit is input to the comparator by the input terminal, the comparator is according to the comparison result of voltage signal and the threshold voltage, detection signal is exported by output end, the fault detection unit includes：The connecting pin that is connected with lamps and lanterns, with the concatenated diode in the connecting pin, the first resistor being connected with the comparator through the diode, the second resistance being connected between the diode and first resistor.The fault detection circuit of the utility model can monitor LED state in RDM lamps and lanterns in real time, and cost is relatively low, and real-time is obviously improved, and realization method is easy, and improves the precision detected in real time and accuracy.
Description
Technical field
The utility model is related to illuminator detection technique field more particularly to a kind of fault detection circuits.
Background technology
Currently, RDM lamps and lanterns are a kind of illuminations to be worked based on RDM (Remote Device Management) agreement
Lamps and lanterns.However, the fault detection circuit of existing RDM lamps and lanterns is all indirectly to detect, there are poor in timeliness, effect speed are slow
The problem of, affect the use of RDM lamps and lanterns.Therefore, in view of the above-mentioned problems, it is necessary to propose further solution.
Utility model content
The utility model is intended to provide a kind of fault detection circuit, to overcome the deficiencies in the prior art.
In order to solve the above technical problems, the technical solution of the utility model is：
A kind of fault detection circuit, is used for the fault detect of RDM circuit lamps and lanterns, and the fault detection circuit includes：Than
At least fault detection unit all the way being connected compared with device and with the comparator；
The comparator has threshold voltage, at least input terminal phase of fault detection unit and the comparator all the way
Connection, the voltage signal from the fault detection unit are input to the comparator, the comparator by the input terminal
According to the comparison result of voltage signal and the threshold voltage, detection signal, the fault detection unit are exported by output end
Including：The connecting pin that is connected with lamps and lanterns, with the concatenated diode in the connecting pin, through the diode and the comparator phase
The first resistor of connection, the second resistance being connected between the diode and first resistor.
The improvement of fault detection circuit as the utility model, the model LM339 of the comparator.
The improvement of fault detection circuit as the utility model, the input terminal include electrode input end and cathode input
End.
The improvement of fault detection circuit as the utility model, the threshold voltage are 0.8V.
The improvement of fault detection circuit as the utility model, the model IN4148 of the diode.
The improvement of fault detection circuit as the utility model, the fault detection unit are four tunnels, four tunnel failure inspections
Unit is surveyed in parallel to be connected with the comparator.
The improvement of fault detection circuit as the utility model, there are four input terminals and four outputs for the comparator tool
End.
Compared with prior art, the utility model has the beneficial effects that：The fault detection circuit of the utility model can be real
When monitoring RDM lamps and lanterns in LED state, cost is relatively low, and real-time is obviously improved, realization method be easy, improve real-time detection
Precision and accuracy.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments described in the utility model, for those of ordinary skill in the art, is not making the creative labor
Under the premise of, other drawings may also be obtained based on these drawings.
Fig. 1 is the circuit diagram of a specific implementation mode of the fault detection circuit of the utility model.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, the fault detection circuit of the utility model is used for the fault detect of RDM circuit lamps and lanterns comprising：Than
At least fault detection unit 2 all the way being connected compared with device 1 and with the comparator 1.
The comparator 1 is used to carry out fault detect according to the voltage signal that fault detection unit 2 is sent.Specifically, institute
Stating comparator 1 has threshold voltage, and the comparator 1 has input terminal and output end.The input terminal includes that anode inputs
End and negative input, at this point, comparator 1 relatively changes output end voltage height by positive input terminal and negative input end voltage
State, to realize that lamp string has trouble-free detection.
It is wherein, described that at least fault detection unit 2 is connected with the input terminal of the comparator 1 all the way.To from institute
The voltage signal for stating fault detection unit 2 is input to the comparator 1 by the input terminal, and the comparator 1 is according to voltage
The comparison result of signal and the threshold voltage exports detection signal by output end.Preferably, the model of the comparator 1
For LM339.
The quantity of the fault detection unit 2 can be configured as needed, the colored lights based on RGBW, the fault detect
Unit 2 is four tunnels, and four road fault detection units 2 are connected with the comparator 1 in parallel.Correspondingly, the comparator 1 has
Four input terminals and four output ends.
Any fault detection unit 2 includes：It is the connecting pin R1- that is connected with lamps and lanterns, concatenated with the connecting pin
Diode DB1, the first resistor RT1 being connected with the positive input terminal of the comparator 1 through the diode DB1, it is connected to institute
State the second resistance RM1 between diode DB1 and first resistor RT1.Preferably, the model IN4148 of the diode DB1.
When the threshold voltage is 0.8V, by taking fault detection unit 2 all the way as an example, the fault detect to the utility model
The work of circuit illustrates.
It is pulled upward to+5V level by RM1, energy source is provided.At this point, if when LED light string works normally, exist at R1-
Voltage, using the one-way conduction and PN junction conduction voltage drop of diode DB1, the voltage for detecting RM1 and RT1 point of intersection at this time can be big
About in 1.7V, to which the 0.8V voltages than negative input end setting are high, comparator output terminal is height, indicates LED light string normal work.
If when LED light string outlet open circuit fault, the voltage at R1- can become 0V, at this time when control channel is opened
The voltage of RM1 and RT1 intersections is exactly the PN junction pressure drop of DB1, is 0.7V or so；Less than the 0.8V of default negative input end, thus
Cause comparator output level to overturn, export low level, the MCU of control lamps and lanterns can be made to trigger and interrupted.MCU may determine that this
There is open circuit fault in LED light string, to close this street lamp string, and to the address code of main controller transmission failure lamps and lanterns, realizes lamps and lanterns
Failure feedback function.
In conclusion the fault detection circuit of the utility model can monitor LED state in RDM lamps and lanterns, cost in real time
Relatively low, real-time is obviously improved, and realization method is easy, and improves the precision detected in real time and accuracy.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (7)
1. a kind of fault detection circuit is used for the fault detect of RDM circuit lamps and lanterns, which is characterized in that the fault detect electricity
Road includes：Comparator and at least fault detection unit all the way being connected with the comparator；
The comparator has threshold voltage, and described at least fault detection unit is connected with the input terminal of the comparator all the way
It connects, the voltage signal from the fault detection unit is input to the comparator, the comparator root by the input terminal
According to the comparison result of voltage signal and the threshold voltage, detection signal, the fault detection unit packet are exported by output end
It includes：The connecting pin that is connected with lamps and lanterns is connected with the concatenated diode in the connecting pin, through the diode with the comparator
The first resistor connect, the second resistance being connected between the diode and first resistor.
2. fault detection circuit according to claim 1, which is characterized in that the model LM339 of the comparator.
3. fault detection circuit according to claim 1, which is characterized in that the input terminal includes electrode input end and bears
Pole input terminal.
4. fault detection circuit according to claim 1, which is characterized in that the threshold voltage is 0.8V.
5. fault detection circuit according to claim 1, which is characterized in that the model IN4148 of the diode.
6. fault detection circuit according to claim 1, which is characterized in that the fault detection unit is four tunnels, four tunnels
Fault detection unit is connected with the comparator in parallel.
7. fault detection circuit according to claim 6, which is characterized in that there are four input terminal and four for the comparator tool
A output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820011850.5U CN207820274U (en) | 2018-01-04 | 2018-01-04 | fault detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820011850.5U CN207820274U (en) | 2018-01-04 | 2018-01-04 | fault detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207820274U true CN207820274U (en) | 2018-09-04 |
Family
ID=63325637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820011850.5U Active CN207820274U (en) | 2018-01-04 | 2018-01-04 | fault detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207820274U (en) |
-
2018
- 2018-01-04 CN CN201820011850.5U patent/CN207820274U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215211 north of Linhu Avenue, FenHu high tech Industrial Development Zone, Wujiang District, Suzhou City, Jiangsu Province Patentee after: Grand Canyon Lighting System (Suzhou) Co.,Ltd. Address before: 215211 north of Linhu Avenue, FenHu high tech Industrial Development Zone, Wujiang District, Suzhou City, Jiangsu Province Patentee before: STRONGLED LIGHTING SYSTEMS (SUZHOU) Co.,Ltd. |