CN210604928U - UV-LED working state closed-loop detection device - Google Patents
UV-LED working state closed-loop detection device Download PDFInfo
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- CN210604928U CN210604928U CN201921454010.7U CN201921454010U CN210604928U CN 210604928 U CN210604928 U CN 210604928U CN 201921454010 U CN201921454010 U CN 201921454010U CN 210604928 U CN210604928 U CN 210604928U
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Abstract
The utility model provides a UV-LED operating condition closed loop detection device, including the signal acquisition subassembly, signal comparison subassembly, the control unit to and single mouthful of output current source, single mouthful of output current source still is connected with the control unit, and the signal acquisition subassembly includes a plurality of signal collector, and each signal collector one end is connected with the UV-LED banks that corresponds, and the other end is connected with single mouthful of output current source, and the signal comparison subassembly includes a plurality of comparators, and each comparator one end is connected with the signal collector that corresponds, and the other end is connected with the control unit. According to the UV-LED working state closed-loop detection device, when any UV-LED lamp group is short-circuited, broken-circuited, high-impedance and low-impedance, the size of data collected by the signal collector is different from a sample signal provided by the single-port output current source control unit, the corresponding comparator outputs an alarm signal to the control unit for alarm prompt, the structure is simple, and the production cost is reduced.
Description
Technical Field
The utility model relates to an LED technical field, in particular to UV-LED operating condition closed loop detection device.
Background
The high-power UV-LED light source is mostly composed of a plurality of LED lamp groups, and a single lamp group is also composed of an electrical structure formed by connecting a plurality of UV-LED wafers in series and then in parallel. During the operation of the UV-LED light source, the abnormal operation of one UV-LED chip unit will result in the failure of the whole light source module or the loss of the function of the light source module, which will result in the undesirable subsequent reaction of the high-demand UV light source.
Most of the current UV-LED products adopt open-loop control, namely, only the LED is powered, and the working state of the LED is not clear. In order to solve the above problems, in the market, a complicated driving circuit is adopted and a method of detecting each UV-LED chip unit is adopted, which is started from a UV-LED driving power supply. Thus, the power supply structure is too large and the cost is too high. There are also methods of inspection using each series UV-LED chip unit, which is much simpler than the previous method, but the circuit is still complex. The power supply cost is still too high and the control method is too cumbersome.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a UV-LED operating condition closed loop detection device to solve the numerous and diverse problem of current UV-LED operating condition detection device drive circuit and power structure.
The utility model provides a UV-LED working state closed-loop detection device, which is used for detecting the working states of a plurality of UV-LED lamp groups, the UV-LED working state closed-loop detection device comprises a signal acquisition component, a signal comparison component connected with the signal acquisition component, a control unit connected with the signal comparison component, and a single-port output current source connected with the signal acquisition component, wherein the single-port output current source is also connected with the control unit, the signal acquisition component comprises a plurality of signal collectors, one end of each signal collector is connected with the corresponding UV-LED lamp group, the other end is connected with the single-port output current source and the signal comparison component, the signal comparison component comprises a plurality of comparators, the input end of each comparator is respectively connected with the control unit and the corresponding signal collector, the output end is connected with the control unit.
According to the UV-LED working state closed-loop detection device, the working states of the UV-LED lamp groups can be detected only through the signal collector, the comparator, the single-port output current source and the control unit, the structure is simple, and the production cost is reduced. When any one UV-LED lamp group is broken or has a high impedance phenomenon, the UV-LED lamp group does not work, as all the UV-LED lamp groups adopt a common single-port output current source, the total current of the single-port output current source is unchanged, no current passes through the serial part of the UV-LED lamp groups, and the total current of the whole UV-LED light source is unchanged, the current of other UV-LED lamp groups in the circuit is increased, as the sample signal is calculated and output by the control unit when all the UV-LED lamp groups work normally, the current sampling signal of any one UV-LED lamp group is basically consistent with the sample signal when the UV-LED lamp groups work normally, at the moment, the current of the UV-LED lamp groups is reduced, the data collected by the signal collector is reduced, and the data of the corresponding signal collector and the data of the sample signal are compared in the corresponding comparator, because the two signals have different magnitudes, the comparator outputs an alarm signal, and the level of the alarm collinear line is lowered, so that the alarm signal of the UV-LED lamp group is output to the control unit for alarm prompt; when any one UV-LED lamp group has a short circuit or low impedance phenomenon, the total current output of the single-port output current source is unchanged, the impedance of the series part of the UV-LED lamp group is reduced, so that the current in the UV-LED lamp group circuit is increased, the current of other UV-LED lamp groups in the series circuit sharing the same current source is reduced, because the sample signal works normally according to all the UV-LED lamp groups, the control unit calculates and outputs the sample signal, the data acquired by the signal acquisition unit corresponding to the UV-LED lamp group is basically consistent with the sample signal in normal work, at the moment, the current of the UV-LED lamp group is reduced, the value of the data acquired by the corresponding signal acquisition unit is increased, the data of the corresponding signal acquisition unit and the sample signal are compared in the corresponding comparator, because the two signals are different in size, the corresponding comparator outputs an alarm signal, and the level of the alarm collinear line is lowered, so that the alarm signal of the UV-LED lamp group is output to the control unit for alarm prompt.
Furthermore, each signal collector is provided with a filter.
Furthermore, the comparator at least comprises an operational amplifier, the homodromous input end of the operational amplifier is connected with the corresponding signal collector, the reverse input end of the operational amplifier is connected with the sample signal end of the control unit, and the output end of the operational amplifier is connected with the control unit.
Further, the signal collector comprises any one of a current sensor, a collecting resistor and a voltage sensor.
Furthermore, the comparator also comprises a shell used for installing a plurality of operational amplifiers, and pins are arranged at the positions of the shell corresponding to the operational amplifiers.
Furthermore, the pins include an access pin, an output pin and a power pin, the access pin is connected with the equidirectional input end and the reverse input end, the output pin is connected with the output end, and the power pin is connected with the single-port output current source.
Furthermore, the UV-LED working state closed-loop detection device also comprises an alarm unit, and the alarm unit is electrically connected with the control unit.
Drawings
Fig. 1 is a UV-LED operation state closed loop detection apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a signal collector in a UV-LED working state closed-loop detection device according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a comparator in a UV-LED operation state closed-loop detection apparatus according to a second embodiment of the present invention.
Description of the main element symbols:
| |
10 | Comparator with a |
21 | |
30 |
| |
11 | |
211 | Single-port output |
40 |
| Filter with a filter element having a plurality of |
12 | |
22 | UV- |
100 |
| |
20 | |
23 |
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a UV-LED working state closed-loop detection device according to a first embodiment of the present invention is used for detecting working states of a plurality of UV-LED lamp sets 100, and includes a signal acquisition component 10, a signal comparison component 20 connected to the signal acquisition component 10, a control unit 30 connected to the signal comparison component 20, and a single-port output current source 40 connected to the signal acquisition component 10, where the single-port output current source 40 is further connected to the control unit 30, the signal acquisition component 10 includes a plurality of signal collectors 11, one end of each signal collector 11 is connected to a corresponding UV-LED lamp set 100, and the other end is connected to the single-port output current source 40 and the signal comparison component 20, the signal comparison component 20 includes a plurality of comparators 21, the input end of each comparator 21 is connected to the control unit 30 and the corresponding signal collector 11, and the output end is connected to the receiving end of the control unit 30.
The UV-LED working state closed-loop detection device can detect the working states of a plurality of UV-LED lamp groups 100 only through the signal collector 11, the comparator 21, the control unit 30 and the single-port output current source 40, has a simple structure, and reduces the production cost. The control Unit 30 may be an MCU (micro controller Unit) of model STM8S105, so as to implement basic control functions.
Specifically, when any one UV-LED lamp set 100 is broken or has a high impedance phenomenon, the UV-LED lamp set 100 does not operate, because all the UV-LED lamp sets 100 adopt a common single-port output current source 40, at this time, the current output of the single-port output current source 40 is unchanged, but no current or current reduction passes through the serial part of the UV-LED lamp set 100, the total current of the whole UV-LED light source is unchanged, so that the currents of other UV-LED lamp sets 100 in the circuit will be increased, because the sample signal is calculated and output by the control unit 30 when all the UV-LED lamp sets normally operate, when the circuit normally operates, the magnitude of the current sampling signal of any one UV-LED lamp set 100 is substantially consistent with the sample signal, at this time, the current of the UV-LED lamp set 100 is reduced, the data collected by the signal collector 11 will be reduced, the data of the corresponding signal collector 11 and the data of the sample signal are compared in the corresponding comparator 21, because the two signals have different magnitudes, the comparator 21 outputs an alarm signal, and lowers the level of the alarm collinear line, so that the alarm signal of the UV-LED lamp group 100 is output to the control unit 30 for alarm prompt; when any one UV-LED lamp set 100 has a short circuit or a low impedance phenomenon, at this time, the current output of the single-port output current source 40 is unchanged, and the impedance of the series part of the UV-LED lamp set 100 decreases, so that the current in the circuit of the UV-LED lamp set 100 increases, the current of the UV-LED lamp sets 100 in other series circuits decreases, because the sample signal is calculated and output by the control unit 30 when all UV-LED lamp sets 100 are normally operated, the size of the data acquired by the signal acquirer 11 corresponding to the UV-LED lamp set 100 in normal operation is substantially consistent with the sample signal, at this time, the current of the UV-LED lamp set 100 decreases, the value of the data acquired by the corresponding signal acquirer 11 increases, the data of the corresponding signal acquirer 11 and the sample signal are compared in the corresponding comparator 21, and because the two signals have different sizes, the corresponding comparator 21 will output an alarm signal, and lower the level of the alarm line, so as to output the alarm signal of the UV-LED lamp set 100 to the control unit 30 for alarm prompt.
Referring to fig. 2 and fig. 3, a difference between the second embodiment and the first embodiment of the UV-LED working status detection apparatus according to the second embodiment of the present invention is that in the second embodiment, the signal collector 11 is a current sensor of model ACS712T to collect the magnitude of the current of the corresponding UV-LED lamp set 100. Meanwhile, in order to improve the authenticity of the signal collector 11 when collecting information, each signal collector 11 is provided with a filter 12 to filter the influence of external electromagnetic waves on the signal collector 11. It can be understood that, in other embodiments of the present invention, the signal collector 11 may be any one of a current sensor, a collecting resistor, and a voltage sensor.
Specifically, in this embodiment, the comparator 21 includes an operational amplifier 211, two adjacent signal collectors 11 are respectively connected to a same-direction input end and a reverse-direction input end of the corresponding operational amplifier 211, and the alarm device 30 is connected to an output end of the operational amplifier 211. It is understood that in the implementation process, the comparator 21 may further include a protection resistor or a protection capacitor to improve the stability of the operational amplifier 211.
Specifically, in this embodiment, the signal comparison component 20 further includes a housing 22 for mounting the plurality of comparators 21, and a pin 23 is disposed at a position of the housing 22 corresponding to the operational amplifier 211. The pins 23 include an access pin, an output pin, and a power pin, the access pin is connected to the equidirectional input terminal and the reverse input terminal, the output pin is connected to the output terminal, and the power pin is connected to the single-port output current source 40, so that the signal collector 11 and the single-port output current source 40 are connected to the corresponding operational amplifier 211. Specifically, the signal comparison component 20 is an integrated operational amplifier of type LM224A, which includes a plurality of operational amplifiers 211.
It is understood that, in the implementation process, in order to implement the basic alarm function, the UV-LED working state closed-loop detection device further includes an alarm unit, and the alarm unit is electrically connected to the control unit 30. The alarm unit can be any one of devices with alarm prompt functions, such as a buzzer, a prompt lamp or a loudspeaker.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A UV-LED working state closed-loop detection device is used for detecting the working states of a plurality of UV-LED lamp sets and is characterized by comprising a signal acquisition component, a signal comparison component connected with the signal acquisition component, a control unit connected with the signal comparison component and a single-port output current source connected with the signal acquisition component, wherein the single-port output current source is also connected with the control unit and comprises a plurality of signal collectors, one end of each signal collector is connected with the corresponding UV-LED lamp set, the other end of each signal collector is connected with the single-port output current source and the signal comparison component, the signal comparison component comprises a plurality of comparators, and the input end of each comparator is respectively connected with the control unit and the corresponding signal collector, the output end is connected with the control unit.
2. The UV-LED closed-loop detection device for working conditions according to claim 1, wherein each signal collector is provided with a filter.
3. The UV-LED working state closed-loop detection device according to claim 1, wherein the comparator comprises at least an operational amplifier, a homodromous input end of the operational amplifier is connected with a corresponding signal collector, a reverse input end of the operational amplifier is connected with a sample signal end of the control unit, and an output end of the operational amplifier is connected with the control unit.
4. The UV-LED working state closed-loop detection device according to claim 1, wherein the signal collector comprises any one of a current sensor, a collecting resistor and a voltage sensor.
5. The UV-LED closed loop detector according to claim 3, wherein said comparator further comprises a housing for mounting a plurality of said operational amplifiers, said housing having pins at positions corresponding to said operational amplifiers.
6. The UV-LED closed loop detection device according to claim 5, wherein the pins comprise an access pin, an output pin and a power supply pin, the access pin is connected with the unidirectional input end and the reverse input end, and the output pin is connected with the output end.
7. The UV-LED closed-loop detection device for working conditions according to claim 1, further comprising an alarm unit, wherein the alarm unit is electrically connected to the control unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921454010.7U CN210604928U (en) | 2019-09-03 | 2019-09-03 | UV-LED working state closed-loop detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921454010.7U CN210604928U (en) | 2019-09-03 | 2019-09-03 | UV-LED working state closed-loop detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693805A (en) * | 2020-05-28 | 2020-09-22 | 珠海格力电器股份有限公司 | Detection circuit and detection method for detecting operating state of sterilization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693805A (en) * | 2020-05-28 | 2020-09-22 | 珠海格力电器股份有限公司 | Detection circuit and detection method for detecting operating state of sterilization device |
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Effective date of registration: 20240426 Address after: 518000 factory building 3, Furong 1st Road West, Furong Industrial Zone, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN YONGCHENG OPTICAL ELECTRONICS CO.,LTD. Country or region after: China Address before: 518000 factory building 3, Furong 1st Road West, Furong Industrial Zone, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SYOCHI ELECTRONICS Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |