CN204575726U - A kind of LED drive power detection system and equipment - Google Patents

A kind of LED drive power detection system and equipment Download PDF

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Publication number
CN204575726U
CN204575726U CN201520196384.9U CN201520196384U CN204575726U CN 204575726 U CN204575726 U CN 204575726U CN 201520196384 U CN201520196384 U CN 201520196384U CN 204575726 U CN204575726 U CN 204575726U
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China
Prior art keywords
module
connects
control module
led drive
thyristor
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Expired - Fee Related
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CN201520196384.9U
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Chinese (zh)
Inventor
唐幸儿
梁季彝
阮太元
黄进盛
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Jiangmen Polytechnic
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Jiangmen Polytechnic
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Abstract

The utility model provides a kind of LED drive power detection system, in system, surge voltage load module connects main control module, main control module connects Pulse width modulation module, Pulse width modulation module connects the thyristor control pole of thyristor control module, and the thyristor first anode of thyristor control module connects power module; The primary side of current transformer connects the thyristor second anode of thyristor control module or power module to be powered at LED drive power module to be detected by ganged switch, the secondary side of current transformer connects amplifier, amplifier connects RMS-DC modular converter, RMS-DC modular converter connects A/D modular converter, and A/D modular converter connects main control module; Main control module is also connected with display module.The utility model additionally provides a kind of LED drive power checkout equipment.Can detect different loads, having output current and voltage can the function of digital-scroll technique.

Description

A kind of LED drive power detection system and equipment
Technical field
The utility model relates to checkout equipment field, is specifically related to a kind of LED drive power detection system and equipment.
Background technology
Form factor mainly thunder and lightning, switch motion, static discharge, these four factors of voltage jump of surge current.This instantaneous overvoltage (or excess current) is called surge voltage (or surge current), is a kind of transition interference.Such as, there will be the surge voltage of 300V ~ 600V when direct current 6V relay coil disconnects; The surge current of 8 ~ 10 times of rated current is there will be when connecting incandescent lamp; When connecting large-scale capacitive load as compensation condenser group, often there will be large inrush current shock, supply voltage is reduced suddenly; Also the switching overvoltage up to rated voltage 8 ~ 10 times is there will be when cutting off no-load transformer.As a rule, surge voltage can damage circuit and parts thereof, and the compressive resistance of its damaged condition and components and parts is closely related.For LED drive power, the ability that Antisurge current impacts is quite important.At present because many manufacturing enterprises reduce the parameter index of the electronic components such as the electric capacity of LED drive power input circuit, voltage dependent resistor (VDR) and wire resistor in order to profit, when there is surge current, be easy to cause LED power to burn.And for this present situation, the test of most LED power manufacturing enterprise also rests on traditional basis, do not test for surge current.For stability and the impact resistance of LED drive power, existing checkout equipment or bulky, expensive, otherwise detectability is limited, does not reach real testing goal.The utility model is exactly develop in this context.
Summary of the invention
First object of the present utility model is solve aforementioned every problem and provide a kind of LED drive power detection system, and it is simple that it has principle, and low in energy consumption, cost is low, and reliability is high, the advantage that detectability is good.
The technical scheme adopted for realizing first object of the present utility model is:
A kind of LED drive power detection system, is characterized in that including surge voltage load module, main control module, Pulse width modulation module, power module, thyristor control module, current transformer, amplifier, RMS-DC modular converter, A/D modular converter, display module; Wherein, described surge voltage load module connects main control module, main control module connects Pulse width modulation module, and Pulse width modulation module connects the thyristor control pole of described thyristor control module, and the thyristor first anode of thyristor control module connects described power module; The primary side of described current transformer connects the thyristor second anode of thyristor control module or power module to be powered at LED drive power module to be detected by ganged switch, the secondary side of current transformer connects described amplifier, amplifier connects described RMS-DC modular converter, RMS-DC modular converter connects described A/D modular converter, and A/D modular converter connects described main control module; Main control module is also connected with described display module.
Further design, described surge voltage load module has simulation thunder and lightning, analog voltage suddenlys change, simulate the signal of static discharge and analog switch action four kinds of different frequency scopes exports, and surge voltage load module is also connected with the rotary encoder module can selecting concrete frequency values.
Further design, described power module is the variable power supply with at least two kinds of different voltages outputs, and described thyristor control module comprises the thyristor cell identical with power module output voltage number.
Further design, described display module includes and can show the output display module of curent change and the input display module of adjustable frequency.
Further design, the simulation thunder and lightning surge frequency range of described surge voltage load module is 90KHZ ~ 100KHZ, analog voltage frequency of mutation scope is 40HZ ~ 65HZ, simulation static discharge frequency range is 50HZ-100HZ, and analog switch operating frequency scope is 0.2KHZ ~ 1KHZ.
Such scheme possesses following beneficial effect:
First, the utility model can adopt rotary encoder to carry out frequency fine adjustment, because the change of frequency impacts LED drive power input circuit, can obtain different output information; Secondly, by arranging output display module, liquid crystal display output current geometric locus can be taked, the deviation of LED drive power input circuit current curve is monitored; 3rd, by arranging surge voltage load module, carry out the test of surge current identical load, the test of surge current different loads, the test of fixed voltage different loads, collectable data are many; 4th, the simulation thunder and lightning wave of oscillation, switch motion, static discharge, voltage jump frequency, make LED drive power carry out simulation test closer to actual environment.
Second object of the present utility model is solve aforementioned every problem and be to provide a kind of LED drive power checkout equipment.
The technical scheme adopted for realizing second object of the present utility model is:
A kind of LED drive power checkout equipment, is characterized in that it comprises aforesaid LED drive power detection system.
Because this programme possesses aforementioned LED drive power detection system, therefore it also has aforementioned beneficial effect.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the circuit connection structure schematic diagram of LED drive power detection system of the present utility model;
Fig. 2 is the testing process block schematic illustration of LED drive power detection system of the present utility model;
Fig. 3 is the surge current formation basic theory block diagram of LED drive power detection system of the present utility model;
Fig. 4 is LED drive power detection system Cleaning Principle block diagram of the present utility model;
Fig. 5 is the logic control block diagram of LED drive power detection system of the present utility model.
Embodiment
Shown in figure 1, a kind of LED drive power detection system, includes surge voltage load module, main control module, Pulse width modulation module, power module, thyristor control module, current transformer, amplifier, RMS-DC modular converter, A/D modular converter, display module; Wherein, described surge voltage load module connects main control module, main control module connects Pulse width modulation module, and Pulse width modulation module connects the thyristor control pole of described thyristor control module, and the thyristor first anode of thyristor control module connects described power module; The primary side of described current transformer connects the thyristor second anode of thyristor control module or power module to be powered at LED drive power module to be detected by ganged switch, the secondary side of current transformer connects described amplifier, amplifier connects described RMS-DC modular converter, RMS-DC modular converter connects described A/D modular converter, and A/D modular converter connects described main control module; Main control module is also connected with described display module.
Further design, described surge voltage load module has simulation thunder and lightning, analog voltage suddenlys change, simulate the signal of static discharge and analog switch action four kinds of different frequency scopes exports, and surge voltage load module is also connected with the rotary encoder module can selecting concrete frequency values.The simulation thunder and lightning surge frequency range of surge voltage load module is 90KHZ ~ 100KHZ, analog voltage frequency of mutation scope is 40HZ ~ 65HZ, simulation static discharge frequency range is 50HZ-100HZ, and analog switch operating frequency scope is 0.2KHZ ~ 1KHZ.
Further design, described power module is have 110V, 150V, 220V, 250V variable power supply of exporting of totally 4 kinds of different voltage, described thyristor control module comprises 4 thyristor cell, and the electric signal after pulse width-modulated module is divided into 4 tunnels to export to 4 thyristor cell respectively by frequency divider.
Further design, described display module includes and can show the output display module of curent change and the input display module of adjustable frequency.
In the utility model, main control module adopts TMS320LF2812, and its performance is: 32bit processor precision, and most high primary frequency 150MHz, 128K × 16bitFLASH, 18K × 16bitSRAM, up to 56 general purpose I/O pin.With the high-speed a/d converter on 12,16 tunnel, input analog voltage scope is 0 ~ 3V, and most high sampling rate is 12.5MSPS, and auto-sequencing device can provide the passage up to 16 tunnels to automatically switch, also can be divided into two independently 8 passages automatically switch.16 road PWM wave form output can be provided at most, support the communications such as SCI, SPI, MCBSP, ECAN.
Shown in Fig. 5, Cleaning Principle of the present utility model is, connect LED drive power module to be detected in systems in which, ganged switch is got to the position connecting thyristor, voltage (such as 250V) needed for selection, by rotary encoder at thunder and lightning, voltage jump, fine tuning within the scope of static discharge equifrequent, the control pole of the electric signal input thyristor after pulse-length modulation, therefore the primary side of current transformer has just accessed surge voltage, the secondary side of current transformer also creates surge current simultaneously, the surge current that secondary side produces collects analog electrical signal by RMS-DC modular converter after amplifier amplifies, again through A/D modular converter by digital data transmission to main control module, main control module exports to display module again by after quantized digital signal, so just surge current curve or voltage curve can be obtained, again ganged switch is got to the position connecting power module, voltage (such as 250V) needed for selection, same, we just can obtain current curve under 250V fixed voltage or voltage curve, by the curve comparison of twice acquisition, if error exceedes the reference value of setting, then can judge LED drive power poor quality to be detected, otherwise it is qualified then to judge.Certainly, also first can test the curve of output under fixed voltage, then test the curve of output under surge voltage.
The utility model also has can test surge current identical load, surge current different loads, fixed voltage unequally loaded function, and possesses the function of output current track monitoring.
The utility model additionally provides a kind of LED drive power checkout equipment (not shown), and it comprises aforesaid LED drive power detection system, does not do tired stating at this.
The above is only preferred embodiment of the present utility model, not does any pro forma restriction to technology contents of the present utility model.Every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of the technical solution of the utility model.

Claims (6)

1. a LED drive power detection system, is characterized in that including surge voltage load module, main control module, Pulse width modulation module, power module, thyristor control module, current transformer, amplifier, RMS-DC modular converter, A/D modular converter, display module; Wherein, described surge voltage load module connects main control module, main control module connects Pulse width modulation module, and Pulse width modulation module connects the thyristor control pole of described thyristor control module, and the thyristor first anode of thyristor control module connects described power module; The primary side of described current transformer connects the thyristor second anode of thyristor control module or power module to be powered at LED drive power module to be detected by ganged switch, the secondary side of current transformer connects described amplifier, amplifier connects described RMS-DC modular converter, RMS-DC modular converter connects described A/D modular converter, and A/D modular converter connects described main control module; Main control module is also connected with described display module.
2. a kind of LED drive power detection system according to claim 1, it is characterized in that described surge voltage load module has simulation thunder and lightning, analog voltage suddenlys change, simulate the signal of static discharge and analog switch action four kinds of different frequency scopes to export, surge voltage load module is also connected with the rotary encoder module can selecting concrete frequency values.
3. a kind of LED drive power detection system according to claim 2, it is characterized in that described power module is the variable power supply with at least two kinds of different voltages outputs, described thyristor control module comprises the thyristor cell identical with power module output voltage number.
4. a kind of LED drive power detection system according to claim 3, is characterized in that described display module includes and can show the output display module of curent change and the input display module of adjustable frequency.
5. a kind of LED drive power detection system according to claim 4, the simulation thunder and lightning surge frequency range that it is characterized in that described surge voltage load module is 90KHZ ~ 100KHZ, analog voltage frequency of mutation scope is 40HZ ~ 65HZ, simulation static discharge frequency range is 50HZ-100HZ, and analog switch operating frequency scope is 0.2KHZ ~ 1KHZ.
6. a LED drive power checkout equipment, is characterized in that this checkout equipment comprises the LED drive power detection system described in any one of claim 1-5.
CN201520196384.9U 2015-04-02 2015-04-02 A kind of LED drive power detection system and equipment Expired - Fee Related CN204575726U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105974331A (en) * 2016-04-08 2016-09-28 江门职业技术学院 LED driving power supply detection system
CN106646041A (en) * 2016-12-08 2017-05-10 中国北方发动机研究所(天津) Engine start initial engaging surge voltage simulation method
CN109143041A (en) * 2018-10-26 2019-01-04 江门霞光智能装备有限公司 The efficient tester of LED power driving plate
CN110333383A (en) * 2019-08-15 2019-10-15 杭州电子科技大学 Single-phase AC voltage high-precision quick detection circuit based on mutual inductor
CN110376420A (en) * 2019-08-15 2019-10-25 杭州电子科技大学 Single-phase alternating current high-precision quick detection circuit based on mutual inductor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105974331A (en) * 2016-04-08 2016-09-28 江门职业技术学院 LED driving power supply detection system
CN106646041A (en) * 2016-12-08 2017-05-10 中国北方发动机研究所(天津) Engine start initial engaging surge voltage simulation method
CN109143041A (en) * 2018-10-26 2019-01-04 江门霞光智能装备有限公司 The efficient tester of LED power driving plate
CN110333383A (en) * 2019-08-15 2019-10-15 杭州电子科技大学 Single-phase AC voltage high-precision quick detection circuit based on mutual inductor
CN110376420A (en) * 2019-08-15 2019-10-25 杭州电子科技大学 Single-phase alternating current high-precision quick detection circuit based on mutual inductor

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20150819

Termination date: 20160402