阅读说明：本技术 一种led灯替换卤素灯的控制电路 (Control circuit for replacing halogen lamp by LED lamp ) 是由 周幸福 黄剑 范吉洋 黄斌 刘志宏 于 2019-10-30 设计创作，主要内容包括：本发明提供了一种LED灯替换卤素灯的控制电路,包括控制系统、开关模块、假负载、信号采集模块及LED光源模块；所述控制系统的输入端分别连接所述LED光源模块、开关模块、假负载；所述开关模块连接所述假负载,所述信号采集模块连接所述开关模块,所述LED光源模块连接所述信号采集模块。应用本技术方案可实现LED光源适配传统卤素灯控制系统的效果。(The invention provides a control circuit for replacing a halogen lamp by an LED lamp, which comprises a control system, a switch module, a dummy load, a signal acquisition module and an LED light source module, wherein the switch module is used for controlling the dummy load to be in a state of being in a standby state; the input end of the control system is respectively connected with the LED light source module, the switch module and the dummy load; the switch module is connected with the dummy load, the signal acquisition module is connected with the switch module, and the LED light source module is connected with the signal acquisition module. By applying the technical scheme, the effect that the LED light source is matched with the traditional halogen lamp control system can be realized.)

1. A control circuit for replacing a halogen lamp by an LED lamp is characterized by comprising a control system, a switch module, a dummy load, a signal acquisition module and an LED light source module; the input end of the control system is respectively connected with the LED light source module, the switch module and the dummy load; the switch module is connected with the dummy load, the signal acquisition module is connected with the switch module, and the LED light source module is connected with the signal acquisition module.

2. The control circuit of claim 1, wherein the signal acquisition module acquires a first normal operation signal of the LED light source module to the switch module, the switch module receives the first normal operation signal and sends a second normal operation signal to the dummy load, the dummy load is turned on, and the control system monitors that the dummy load is normal and the control system operates normally.

3. The circuit of claim 2, wherein the signal acquisition module acquires a first abnormal signal of the LED light source module to the switch module, the switch module receives the first abnormal signal and sends a second abnormal signal to the dummy load, the dummy load is turned off, the control system monitors that the dummy load is abnormal, and the control system is turned off.

4. The control circuit for replacing the halogen lamp by the LED lamp according to claim 3, wherein the switch module is a relay, and the signal acquisition module controls the relay to be turned on or off; the relay is turned on, and the dummy load normally operates; the relay is closed and the dummy load is disconnected and closed.

5. The control circuit of claim 3, wherein the switch module is an MOS transistor, a gate of the MOS transistor is connected to the signal acquisition module, a source of the MOS transistor is connected to the input of the control system, and the dummy load is connected between the input of the control system and a drain of the MOS transistor; the signal acquisition module controls the MOS tube to be conducted or not conducted, the MOS tube is conducted, the dummy load normally runs, the MOS tube is not conducted, and the dummy load is broken and closed.

6. The control circuit for replacing the halogen lamp by the LED lamp according to claim 4 or 5, wherein the signal acquisition module comprises a sampler and an execution unit; the sampler collects the information of the LED light source module and sends the information to the execution unit, and the execution unit sends an instruction to the switch module according to the received information.

7. The LED lamp halogen lamp replacing control circuit according to claim 6, wherein the execution unit comprises a first triode, a second triode, a first diode and a second diode; the base electrodes of the first triode and the second triode are respectively connected with the positive electrodes of the first diode and the second diode, the emitting electrodes of the first triode and the second triode are respectively connected with the input end of the control system, the collecting electrode of the first triode is connected with the switch module, and the collecting electrode of the second triode is connected with the base electrode of the first triode.

8. The control circuit for replacing halogen lamp by LED lamp as claimed in claim 7, wherein the sampler is a current detection resistor; the current detection resistor detects whether the current flowing through the LED light source module exceeds a preset value; if the current exceeds the preset value, the first triode is conducted, the switch module is closed, and the dummy load is disconnected and closed; if the false load does not exceed the preset value, the first triode is not conducted, the switch module is conducted, and the false load operates.

9. The control circuit of LED lamp replacing halogen lamp according to claim 4 or 5, wherein the signal collection module is specifically an optical coupler, a light emitting source of the optical coupler is connected with the LED light source module, and a light receiving device of the optical coupler is connected with the switch module; the LED light source module operates normally, current flows through the luminous source, the luminous source emits light, the light receiver senses the luminous source to emit light, a first normal operation signal is sent to the switch module, and the switch module controls the dummy load to be started; the LED light source module is abnormal, no current flows through the luminous source, the luminous source does not emit light, the light receiver does not sense the luminous source to emit light, a first abnormal signal is sent to the switch module, and the switch module controls the dummy load to be switched off.

10. The control circuit for replacing the halogen lamp by the LED lamp according to claim 4 or 5, wherein the signal acquisition module is a photosensitive device, and the photosensitive device is connected with the switch module; the LED light source module operates normally, the photosensitive device senses an optical signal to generate an induced current, the switch module receives a first normal operation signal, and the switch module controls the dummy load to operate; the LED light source module is abnormal, the photosensitive device does not sense a light signal, the switch module receives a first abnormal signal, and the switch module controls the dummy load to be turned off.

Technical Field

The invention relates to the field of illumination, in particular to a control circuit for replacing a halogen lamp by an LED lamp.

Background

The light sources commonly used in the traditional signal lamp are incandescent lamps and halogen lamps, and in the field of traffic control, the halogen lamps are generally used, provided with reflecting cups and projected through optical filters and light guide optical fibers to form signal patterns. The halogen lamp has low luminous efficiency and short service life, generally has the service life of 3000 hours of 2000-plus, has high maintenance cost, and basically needs to be replaced once in 2-3 months. Compared with halogen lamps, the LED light source has high luminous efficiency and long service life, generally reaches 10 years, and the expected service life is reduced to 5-6 years in consideration of the influence of outdoor severe environment. Traditional signal lamp control system device and the not friendly matching of current LED light source directly abandon traditional signal lamp control system, use neotype LED display system, and the replacement cost is very expensive.

Disclosure of Invention

The invention aims to provide a control circuit for replacing a halogen lamp by an LED lamp, and the effect that an LED light source is matched with a traditional halogen lamp control system is achieved.

In order to solve the technical problem, the invention provides a control circuit for replacing a halogen lamp by an LED lamp, which comprises a control system, a switch module, a dummy load, a signal acquisition module and an LED light source module; the input end of the control system is respectively connected with the LED light source module, the switch module and the dummy load; the switch module is connected with the dummy load, the signal acquisition module is connected with the switch module, and the LED light source module is connected with the signal acquisition module.

In a preferred embodiment, the signal acquisition module acquires a first normal operation signal of the LED light source module to the switch module, the switch module receives the first normal operation signal and sends a second normal operation signal to the dummy load, the dummy load is turned on, the control system monitors that the dummy load is normal, and the control system operates normally.

In a preferred embodiment, the signal acquisition module acquires a first abnormal signal of the LED light source module to the switch module, the switch module receives the first abnormal signal and sends a second abnormal signal to the dummy load, the dummy load is turned off, the control system monitors that the dummy load is abnormal, and the control system is turned off.

In a preferred embodiment, the switch module is specifically a relay, and the signal acquisition module controls the relay to be turned on or off; the relay is turned on, and the dummy load normally operates; the relay is closed and the dummy load is disconnected and closed.

In a preferred embodiment, the switch module is specifically an MOS transistor, a gate of the MOS transistor is connected to the signal acquisition module, a source of the MOS transistor is connected to the input end of the control system, and the dummy load is connected between the input end of the control system and a drain of the MOS transistor; the signal acquisition module controls the MOS tube to be conducted or not conducted, the MOS tube is conducted, the dummy load normally runs, the MOS tube is not conducted, and the dummy load is broken and closed.

In a preferred embodiment, the signal acquisition module comprises a sampler and an execution unit; the sampler collects the information of the LED light source module and sends the information to the execution unit, and the execution unit sends an instruction to the switch module according to the received information.

In a preferred embodiment, the execution unit specifically includes a first triode, a second triode, a first diode and a second diode; the base electrodes of the first triode and the second triode are respectively connected with the positive electrodes of the first diode and the second diode, the emitting electrodes of the first triode and the second triode are respectively connected with the input end of the control system, the collecting electrode of the first triode is connected with the switch module, and the collecting electrode of the second triode is connected with the base electrode of the first triode.

In a preferred embodiment, the sampler is embodied as a current detection resistor; the current detection resistor detects whether the current flowing through the LED light source module exceeds a preset value; if the current exceeds the preset value, the first triode is conducted, the switch module is closed, and the dummy load is disconnected and closed; if the false load does not exceed the preset value, the first triode is not conducted, the switch module is conducted, and the false load operates.

In a preferred embodiment, the signal acquisition module is specifically an optical coupler, a light emitting source of the optical coupler is connected to the LED light source module, and a light receiving device of the optical coupler is connected to the switch module; the LED light source module operates normally, current flows through the luminous source, the luminous source emits light, the light receiver senses the luminous source to emit light, a first normal operation signal is sent to the switch module, and the switch module controls the dummy load to be started; the LED light source module is abnormal, no current flows through the luminous source, the luminous source does not emit light, the light receiver does not sense the luminous source to emit light, a first abnormal signal is sent to the switch module, and the switch module controls the dummy load to be switched off.

In a preferred embodiment, the signal acquisition module is specifically a photosensitive device, and the photosensitive device is connected with the switch module; the LED light source module operates normally, the photosensitive device senses an optical signal to generate an induced current, the switch module receives a first normal operation signal, and the switch module controls the dummy load to operate; the LED light source module is abnormal, the photosensitive device does not sense a light signal, the switch module receives a first abnormal signal, and the switch module controls the dummy load to be turned off.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

the invention provides a control circuit for replacing a halogen lamp by an LED lamp, and the scheme only needs to replace the halogen lamp by an LED light source without replacing the traditional signal lamp control system. The problem of impedance matching between an LED light source and a halogen lamp is solved by adding a dummy load, and the dummy load can be added to increase the dummy load current so as to match the original control system; in addition, the dummy load can be cut off when the LED fails through the cooperation between the signal acquisition module and the switch module, so that the control system can make correct judgment, and the safe operation of the system is ensured. Therefore, the LED lamp can be installed to replace a halogen lamp without replacing the traditional control system, the replacement cost is saved, and the use effect is improved.

Drawings

FIG. 1 is a schematic circuit diagram of a preferred embodiment 1 of the present invention;

FIG. 2 is a schematic circuit diagram of the preferred embodiment 2 of the present invention;

FIG. 3 is a schematic circuit diagram of the preferred embodiment 3 of the present invention;

fig. 4 is a schematic diagram of the circuit of the preferred embodiment 4 of the present invention.

Detailed Description

The invention is further described with reference to the following figures and detailed description.