CN115066071A - Lamp controller - Google Patents

Abstract

The invention discloses a lamp controller, comprising a control unit, a state monitoring module, a signal converter, a power supply unit and a lamp driver; the power supply unit provides power for the control unit and the lamp driver; the state monitoring module is used for real-time collection of the load working state of the lamp and the external light intensity and send it to the control unit; the control unit outputs the PWM dimming signal to the signal converter according to the preset control rules according to the working state of the load and the external light intensity; the signal converter is used to convert the received PWM dimming signal into The analog voltage signal is sent to the lamp driver; the lamp driver is used to dim the lamp according to the analog voltage signal. The lamp controller provided by the invention realizes automatic overcurrent protection and overload protection, greatly reduces the work pressure of the street lamp management department, improves work efficiency, and thus significantly improves social energy-saving benefits.

Description

a light controller

【Technical field】

The invention relates to the technical field of lamps, in particular to a lamp controller.

【Background technique】

At present, public lighting equipment such as street lamps have been widely used. Taking street lighting systems as an example, the street lamp management department needs to monitor the lighting conditions of each street lamp, including electricity consumption, luminous intensity, lighting duration, etc. The number of street lamps requires the street lamp management department to pay a large labor cost and time cost for corresponding management, which makes the work pressure of the street lamp management department higher, and the work efficiency is not high, which is not conducive to improving social energy-saving benefits.

In view of this, it is necessary to provide a lamp controller to overcome the above drawbacks.

[Content of the invention]

The purpose of the present invention is to provide a lamp controller, which aims to solve the problem that the existing lighting system needs to pay a large labor cost and time cost for corresponding management, reduce the work pressure of the street lamp management department, improve the work efficiency, and thus significantly Improve social energy-saving benefits.

In order to achieve the above object, the present invention provides a lamp controller, including a control unit, a state monitoring module, a signal converter, a power supply unit and a lamp driver;

The power supply unit provides power for the control unit and the lamp driver; the state monitoring module is used to collect the load working state and external light intensity of the lamp in real time and send them to the control unit; the control unit according to the The load working state and the external light intensity output a PWM dimming signal to the signal converter according to a preset control rule; the signal converter is used to convert the received PWM dimming signal into an analog voltage signal and send it to the signal converter. The lamp driver; the lamp driver is used for dimming the lamp according to the analog voltage signal.

In a preferred embodiment, the state monitoring module includes an electric energy metering unit; the electric energy metering unit is used to measure the line voltage and current of the lamp, and then calculate the active power, apparent power and power factor and send them to the the control unit.

In a preferred embodiment, the power metering unit integrates two sigma-delta ADCs and one power metering core.

In a preferred embodiment, the state monitoring module further includes a storage unit, and the storage unit is configured to store the measurement parameters and the electric energy calculation results detected by the electric energy metering unit.

In a preferred embodiment, the state monitoring module includes an attitude sensor, and the attitude sensor is used to monitor the attitude information of the lamp carrier and send the attitude information to the control unit; when the control unit determines that the When the above attitude information exceeds the preset normal value range of attitude, a reminder will be issued through the indicator light.

In a preferred embodiment, the state monitoring module includes a leakage monitoring unit, the leakage monitoring unit is used to monitor and determine whether there is a leakage fault in the lamp, and if it is determined that there is a leakage fault, send warning information to the control unit.

In a preferred embodiment, the state monitoring module includes a photosensitive sensor, and the photosensitive sensor is used to collect the ambient light intensity of the environment where the lamp is located.

In a preferred embodiment, a wireless communication unit electrically connected to the control unit is further included, and the wireless communication unit is used to implement wireless communication between the control unit and an external network.

In a preferred embodiment, the signal converter is used for linearly converting a PWM dimming signal with a duty cycle of 0%-100% into an analog voltage of 0-5V or 0-10V, and the output voltage accuracy is less than 1%.

In a preferred embodiment, the power supply unit includes an EMC filter circuit, and the EMC filter circuit is used to filter the AC power input from the outside world.

The lamp controller provided by the present invention is used to collect the load working state and the external light intensity of the lamp in real time through the state monitoring module, so that the control unit can output PWM to the signal converter according to the preset control rules according to the load working state and the external light intensity. The dimming signal, which enables the lamp driver to dim the lamp according to the analog voltage signal, realizes the function of automatic monitoring of the working state of the lamp, and can adjust the dimming according to the load working state of the lamp to avoid the overcurrent and overload of the lamp. , realizes automatic overcurrent protection and overload protection, greatly reduces the work pressure of the street lamp management department, improves work efficiency, and significantly improves social energy-saving benefits.

【Description of drawings】

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a topological frame diagram of a lamp controller provided by the present invention.

【Detailed ways】

In order to make the objectives, technical solutions and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are only for explaining the present invention, and not for limiting the present invention.

It is also to be understood that the terminology used in this specification of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural unless the context clearly dictates otherwise.

It should further be understood that, as used in this specification and the appended claims, the term "and/or" refers to and including any and all possible combinations of one or more of the associated listed items .

In an embodiment of the present invention, a lamp controller 100 is provided, which is used to realize automatic dimming control of the lamp, and avoid potential safety hazards such as overcurrent and overload of the lamp. The lamps include, but are not limited to, LED lamps (light-emitting diodes, light-emitting diodes), high-pressure sodium lamps, and the like.

As shown in FIG. 1 , the lamp controller 100 includes a control unit 10 , a state monitoring module (including 31 , 32 , 33 , 34 and 35 in the figure), a signal converter 40 , a power supply unit 20 and a lamp driver 50 .

The power supply unit 20 provides power for the control unit 10 and the lamp driver 50 . Specifically, the power supply unit 20 is used to connect an external power supply (eg, 220V alternating current), and can directly provide a corresponding power supply to the lamp driver 50, and can also supply power to the control unit 10 after steps such as step-down of the external power supply, AC-DC conversion, etc. . The process of supplying power from the power supply unit 20 to the control unit 10 includes steps such as transforming the 220V alternating current into 12V alternating current, converting the 12V alternating current into 5V direct current, and converting the 5V direct current into a voltage (eg, 3.3V direct current) that meets the requirements of the control unit. . It should be noted that the power supply unit 20 can supply power to other modules and units through the control unit 10 .

Further, the power supply unit 20 includes an EMC (Electromagnetic Magnetic Compatibility, Electromagnetic Compatibility) filter circuit 21, and the EMC filter circuit 21 is used for filtering the AC power input from the outside, reducing the strong electromagnetic interference and electric spark interference on site, and correcting the site. Instrumentation to ensure the safe and reliable operation of the automatic control system.

In the embodiment of the present invention, the state monitoring module is used to collect the load working state and the external light intensity of the lamps in real time and send them to the control unit 10, so as to monitor the use conditions of the lamps in real time, and send the parameters obtained by monitoring to the control unit 10. control unit 10.

Specifically, the state monitoring module includes an electric energy metering unit 31 . Wherein, the power metering unit 31 may be built in the control unit 10 . The electric energy metering unit 31 is used to measure the line voltage and current of the lamp, and then calculate the active power, apparent power and power factor and send them to the control unit 10, so that the load working condition of the lamp controller 100 can be collected in real time.

Wherein, the electric energy measurement unit 31 integrates two sigma-delta ADCs (analog to digital converter, analog-to-digital converter) and an electric energy measurement core. In this embodiment, the existing high-precision HLW8032 chip can be used as the energy metering core, which can perform data communication through the UART (Universal Asynchronous Receiver Transmitter) port, and uses 5V power supply, built-in 3.579M crystal oscillator, with high precision, high power consumption It has the advantages of small size, high reliability and strong adaptability to the environment, and is suitable for electric energy measurement of single-phase two-wire power users. Of course, the power metering unit can also use other chips that are suitable for use according to application scenarios. The above-mentioned type of chips is only for illustration, and the present invention does not limit it herein.

It should be noted that the sigma-delta ADC is composed of an analog circuit and a digital signal processing circuit, and usually includes two modules: a sigma-delta modulator and a digital signal processing module, the latter is usually a digital filter, according to the previous sampling value The difference (increment) with the last sampling value is quantized and encoded, usually using a one-bit quantizer, and using oversampling and sigma-delta modulation techniques to obtain extremely high resolution.

Further, the state monitoring module further includes a storage unit 34 . In this embodiment, the storage unit 34 is a Flash chip (flash memory chip). The storage unit 34 is used for storing the measurement parameters and the electric energy calculation result detected by the electric energy metering unit 31, so as to realize the function of checking the records, and this operation can also be realized by the upper computer.

In other embodiments, the condition monitoring module includes a posture sensor 32 . The attitude sensor 32 is used to monitor the attitude information of the lamp carrier (eg, street light pole) and send the attitude information to the control unit 10 . When the control unit 10 determines that the attitude information exceeds the preset normal attitude value range, for example, the street light pole is inclined, a reminder is issued through the indicator light. It should be noted that the steps and principles of attitude determination of the attitude sensor 32 may refer to the prior art, which is not limited in the present invention.

In other embodiments, the condition monitoring module includes a leakage monitoring unit 35 . The leakage monitoring unit 35 is used to monitor and determine whether there is a leakage fault in the lamp, and if it is determined that there is a leakage fault, send warning information to the control unit 10 to avoid potential safety hazards such as leakage.

In other embodiments, the condition monitoring module includes a photosensitive sensor 33 . The photosensitive sensor 33 is used to collect the external light intensity of the environment where the lamp is located, which is convenient for the control unit 10 to adjust the light according to the external light intensity. , at this time, the lamps can be automatically controlled to turn on or brighten the lamps, so that the lamps can meet the needs of the people without wasting electric energy.

In the embodiment of the present invention, the control unit 10 outputs a PWM dimming signal to the signal converter 40 according to a preset control rule according to the working state of the load and the external light intensity. Wherein, the preset control rule may be to turn on the lamp if it is lower than a certain light intensity threshold, turn off the lamp if it is higher than another threshold of the certain light intensity, or may correspond to different dimming brightness according to different light intensity value intervals.

In this embodiment, the control unit 10 is a low-power MUC (Micro Control Unit), and takes the low-power MUC as the core, uses the photosensitive sensor 33 to collect light intensity and converts it through AD conversion (analog-to-digital conversion) inside the MCU ), and the relay unit constitutes a control circuit for automatic PWM (Pulse width modulation, pulse width modulation) output dimming.

The signal converter 40 is used for converting the received PWM dimming signal into an analog voltage signal and sending it to the lamp driver 50; the lamp driver 50 is used for dimming the lamp according to the analog voltage signal. Specifically, the signal converter 40 (eg GP8101M, etc.) is equivalent to a PWM signal input and a DAC (digital-to-analog converter) for analog signal output, which is used to linearly convert the PWM dimming signal with a duty cycle of 0%-100% into an analog voltage of 0-5V or 0-10V, and the output voltage accuracy is less than 1%. Among them, GP8101M can process high-frequency modulated PWM signals, and can be used in conjunction with high-frequency modulated APC chips to isolate analog signals, so as to realize the function of 1-way switch and 0~10V/PWM dimming signal output.

In other embodiments, the light fixture controller 100 further includes a wireless communication unit 60 that is electrically connected to the control unit 10 . The wireless communication unit 60 is used to implement wireless communication between the control unit 10 and an external network. In this embodiment, the wireless communication unit 60 is a full Netcom NB-IoT (Narrow Band Internet of Things) wireless communication module, which conforms to the LTE (Long Term Evolution, Long Term Evolution) standard NB-IoT narrowband communication standard, Using the license frequency band, three deployment methods, in-band, guard band, or independent carrier, can be adopted to coexist with the existing network. For example, the wireless communication unit 60 adopts the EC-01F module, and the main chip solution used in the NB part is EC616S, which has an ultra-integrated NB-IoT SoC, supports ultra-low power consumption, and fully supports 3GPP Rel14 NB -IoT standard, so it can bring the advantages of strong link and high coverage in the case of low power consumption, that is, in the unique MCU mode, it can provide lower operating current and shorter wake-up time.

To sum up, the lamp controller 100 provided by the present invention is used to collect the load working state and the external light intensity of the lamp in real time through the state monitoring module, so that the control unit 10 can follow the preset control rules according to the load working state and the external light intensity. The PWM dimming signal is output to the signal converter 40, so that the lamp driver 50 can dim the lamp according to the analog voltage signal, realize the function of automatic monitoring of the working state of the lamp, and can perform corresponding operation according to the load working state of the lamp. Dimming, avoiding over-current and overload of lamps, realizing automatic over-current protection and overload protection, greatly reducing the work pressure of street lamp management departments, improving work efficiency, and significantly improving social energy-saving benefits.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. Module completion, that is, dividing the internal structure of the system into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated in one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit, and the above-mentioned integrated units may adopt hardware. It can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application. For the specific working processes of the units and modules in the above-mentioned system, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the foregoing embodiments, the description of each embodiment has its own emphasis. For parts that are not described or described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art can realize that the units and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In the embodiments provided by the present invention, it should be understood that the disclosed system or apparatus/terminal device and method may be implemented in other manners. For example, the above-described system or apparatus/terminal device embodiments are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple divisions. Individual units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of systems or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The present invention is not limited only to what is described in the specification and embodiments, so that additional advantages and modifications can easily be realized by those skilled in the art, without departing from the spirit and scope of the general concept defined by the claims and equivalents In the event that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (10)

1. A lamp controller, characterized in that it comprises a control unit, a state monitoring module, a signal converter, a power supply unit and a lamp driver; The power supply unit provides power for the control unit and the lamp driver; the state monitoring module is used to collect the load working state and external light intensity of the lamp in real time and send them to the control unit; the control unit according to the The load working state and the external light intensity output a PWM dimming signal to the signal converter according to a preset control rule; the signal converter is used to convert the received PWM dimming signal into an analog voltage signal and send it to the signal converter. The lamp driver; the lamp driver is used for dimming the lamp according to the analog voltage signal. 2. The lamp controller according to claim 1, wherein the state monitoring module comprises an electric energy measuring unit; the electric energy measuring unit is used to measure the line voltage and current of the lamp, and then calculate the active power, Apparent power and power factor are sent to the control unit. 3 . The lamp controller according to claim 2 , wherein the electric energy measurement unit integrates two sigma-delta ADCs and an electric energy measurement core. 4 . 4 . The lamp controller according to claim 2 , wherein the state monitoring module further comprises a storage unit, and the storage unit is configured to store the measurement parameters and electric energy calculation results detected by the electric energy measurement unit. 5 . 5. The lamp controller according to claim 1, wherein the state monitoring module comprises an attitude sensor, and the attitude sensor is used to monitor attitude information of the lamp carrier and send the attitude information to the a control unit; when the control unit judges that the attitude information exceeds the preset normal attitude value range, a reminder is issued through an indicator light. 6. The lamp controller according to claim 1, wherein the state monitoring module comprises a leakage monitoring unit, and the leakage monitoring unit is used to monitor and determine whether there is a leakage fault in the lamp, and if it is determined that there is a leakage fault, Then send warning information to the control unit. 7 . The lamp controller according to claim 1 , wherein the state monitoring module comprises a photosensitive sensor, and the photosensitive sensor is used to collect the external light intensity of the environment where the lamp is located. 8 . 8 . The lamp controller according to claim 1 , further comprising a wireless communication unit electrically connected with the control unit, the wireless communication unit being used to implement wireless communication between the control unit and an external network. 9 . 9. The lamp controller according to claim 1, wherein the signal converter is used to linearly convert the PWM dimming signal with a duty cycle of 0%-100% into an analog 0-5V or 0-10V voltage, and the output voltage accuracy is less than 1%. 10 . The lamp controller according to claim 1 , wherein the power supply unit comprises an EMC filter circuit, and the EMC filter circuit is used to filter the AC power input from the outside. 11 .

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