CN104122847A - Method for transmitting signal by using power waveform - Google Patents

Abstract

A method for transmitting signals using power waveforms is applied to a load control system. The load control system includes a phase angle control module and a drive module. The phase angle control module is electrically connected to an input interface. The method includes the following Steps: A. The phase angle control module detects the state of the input interface; B. According to the state detected in step A, the waveform of an AC power source is changed so that half of the wave cycle of the waveform has a delayed conduction angle C. The drive module receives the electric energy output by the phase angle control module, and after the delayed conduction angle exists in the waveform of the electric energy output in the judgment step B, judge the input interface according to the delayed conduction angle State; D. Outputting a pair of electrical signals corresponding to the state of the input interface to a load according to the state of the input interface.

Description

A method of transmitting signals using power waveforms

technical field

The present invention is related to signal transmission, and more specifically refers to a method for transmitting signals using power waveforms.

Background technique

The indoor wiring method of a general building is to reserve two wires for connecting switches between the electrical box on the ceiling and the electrical box on the wall. When installing electrical equipment (such as loads such as lamps or fans), install the electrical equipment on the ceiling, and connect one end of the mains power to the electrical equipment, and connect the other end of the mains power to a switch in series through a reserved wire. Then connect it back to the electrical equipment to form a power loop. By switching the switch, the opening and closing of electrical equipment can be controlled.

With the advancement of science and technology, electrical equipment has more and more functions. Taking LED lighting system as an example, today's LED lighting system has the function of adjusting brightness and chromaticity in addition to simple control of opening and closing. Therefore, In addition to the original power circuit, additional control lines are required to transmit control signals from the control panel on the wall to the LED modules installed on the ceiling.

Therefore, when installing an LED lighting system with brightness and chromaticity adjustment functions, additional control lines must be connected to transmit control signals to control the LED modules of the lighting system. Of course, the additional connection of control lines will increase the repair and decoration construction costs of the house.

There are two other ways to transmit control signals without additional control lines, one is wireless transmission, and the other is carrier transmission. The wireless transmission method is to install a wireless receiver and a transmitter on the light emitting diode module and the control panel on the wall respectively, and transmit control signals to control the light emitting diode module through wireless transmission. The carrier transmission method is to use the modulator to modulate the control signal into a frequency modulation signal or an amplitude modulation signal, use the power line carrier, and then use the demodulator to return the original control signal to control the light-emitting diode module.

However, the equipment cost of the above two methods is expensive, and the transmitter and the modulator on the wall of the building must be connected with a power line, and the power line is also an additional trouble. Furthermore, the signals transmitted by wireless or carrier wave are easily interfered by other wireless signals, and it is even more troublesome to pass the EMI and EMS safety regulations of various countries.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for transmitting signals by using power waveforms, which can transmit signals by using the wiring of the power circuit.

In order to achieve the above purpose, the method for transmitting signals using power waveforms provided by the present invention is applied to a load control system, the load control system includes a phase angle control module and a drive module electrically connected to each other, the phase The corner control module is electrically connected to an AC power supply and an input interface, and the drive module is electrically connected to a load. The method includes the following steps:

A. The phase angle control module detects the state of the input interface;

B. The phase angle control module changes the waveform of the AC power supply according to the state detected in step A, so that half of the wave cycle of the AC power waveform has a delayed conduction angle before outputting;

C. The drive module receives the electric energy output by the phase angle control module, and after judging that the delayed conduction angle exists in the waveform of the electric energy output by the phase angle control module, judge the state of the input interface according to the delayed conduction angle ;as well as

D. The drive module outputs an electrical signal corresponding to the state of the input interface to the load according to the state of the input interface judged in step C.

Therefore, through the method of transmitting signals by using the power supply waveform, the signal can be transmitted by using the wiring of the power supply circuit, without additional wiring of the control circuit, and the cost of wiring can be effectively reduced.

Description of drawings

According to above-mentioned purpose, below in conjunction with preferred embodiment and cooperate accompanying drawing, technical means and effect thereof that the present invention adopts are described, wherein:

Fig. 1 is the block diagram of the lighting system of the first preferred embodiment of the present invention;

Fig. 2 is the block diagram of the illumination system of the second preferred embodiment of the present invention;

Fig. 3 is the block diagram of the lighting system of the third preferred embodiment of the present invention;

Fig. 4 is the block diagram of the illumination system of the 4th preferred embodiment of the present invention;

Fig. 5 is another implementation aspect of the lighting system of the first preferred embodiment;

Fig. 6 is another implementation aspect of the lighting system of the second preferred embodiment;

Fig. 7 is another implementation aspect of the lighting system of the third preferred embodiment;

Fig. 8 is another implementation aspect of the lighting system of the fourth preferred embodiment; and

Fig. 9 is a block diagram of a lighting system according to a fifth preferred embodiment of the present invention.

Detailed ways

In order to illustrate the present invention more clearly, the following examples are enumerated and described in detail with accompanying drawings. The following is a load control system using an LED lighting system as an example to illustrate the method for transmitting signals using power waveforms according to the present invention.

FIG. 1 shows an LED lighting system 1 according to a first preferred embodiment of the present invention, which includes a load such as an LED module 10 , an input interface 12 , and a phase signal transmission device 14 .

The LED module 10 has a plurality of LEDs for receiving electrical signals to generate bright light for illumination. The input interface 12 includes a switch 122 , the switch 122 is a normally open press switch, and the switch 122 is in a short-circuit state when the user presses it.

The phase signal transmission device 14 includes a phase angle control module 16 and a driving module 18 . in:

The phase angle control module 16 is electrically connected to an AC power source S and the switch 122, and the phase angle control module 16 is used to detect the state of the switch 122, and when the switch 122 is pressed and turned on, the phase angle control The module 16 changes the waveform of the AC power source S so that the positive half-wave cycle of the AC power source S generates a delayed conduction angle and then outputs it; and when the switch 122 is not pressed, the switch 122 automatically returns to an open circuit state, and the phase angle control module 16 does not change the waveform of the AC power source S, that is, the delayed conduction angle does not exist in the waveform output by the phase angle control module 16 . The angle of the delayed conduction angle is preferably less than or equal to 90 degrees, so as to reduce the harmonics of the AC power supply and reduce the degree of power factor degradation.

The driving module 18 includes a power conversion circuit 182 and a control unit 184 electrically connected to each other. Wherein, the power conversion circuit 182 is electrically connected to the phase angle control module 16 and the LED module 10 for receiving the electric energy output by the phase angle control module 16 and converting it into the electric energy required by the LED module 10 , The power conversion circuit 182 can controlly change the on/off state and brightness of the LED module 10 . In this embodiment, the power conversion circuit 182 is designed on the basis of a pulse width modulation (Pulse Width Modulation, PWM) circuit, and adjusts the electrical signal supplied to the LED module 10 through pulse width modulation. frequency width. Of course, in actual implementation, the power conversion circuit 182 can also be designed to adjust the magnitude of the electrical signal or other electrical signal adjustment circuits.

The control unit 184 includes a phase angle detection circuit 184a and a processor 184b. The phase angle detection circuit 184a is electrically connected to the phase angle control module 16, and is used to detect whether the waveform of the electric energy output by the phase angle control module 16 has the delayed conduction angle and detect the angle of the delayed conduction angle. , and transmit the detection result to the processor 184b. The processor 184b has multiple control modes built in, the control modes include a full-bright lighting mode, a default lighting mode and a brightness adjustment mode, and one of the control modes controls the electrical signal output by the power conversion circuit 182 , to drive the LED module 10 to generate bright light, and use the result of the delayed conduction angle detected by the phase angle detection circuit 184a to judge the state of the switch 122 as a basis for switching control modes. in:

The full-bright lighting mode is to control the power conversion circuit 182 to drive the LED module 10 to generate bright light with maximum brightness under rated power.

The default lighting mode is to control the power conversion circuit 182 to drive the LED module 10 to produce bright light with a default brightness value. In this embodiment, the default brightness value is initially set to half of the maximum brightness value. In mode, the preset brightness value can be updated.

The brightness adjustment mode is to control the power conversion circuit 182 to drive the bright light generated by the LED module 10 to repeatedly change between a first brightness value and a second brightness value until the processor 184b judges that the state of the switch 122 changes. , stop controlling the change of brightness, and record the brightness value of the bright light currently produced by the LED module 10, and replace the original default brightness value of the default lighting mode with the recorded brightness value, and drive the LED module 10 to generate a new The bright light of the preset brightness value. In this embodiment, the first brightness value is the maximum brightness value, and the second brightness value is the minimum brightness value. Therefore, in the brightness adjustment mode, the light of the LED module 10 is between the maximum brightness and the minimum brightness. change between.

Since the switch 122 is pressed, the delayed conduction angle exists in every cycle of the waveform of the electric energy output by the phase angle control module 16, so the processor 184b can be based on the number of cycles with the delayed conduction angle Calculate the length of time that the switch 122 is pressed, and switch the control mode accordingly.

In the initial state (when the AC power supply S is just connected) and before the switch 122 is not pressed, the phase angle control module 16 does not change the waveform of the AC power supply S, and the waveform detected by the phase angle detection circuit 184a does not have the Delaying the conduction angle, at this time, the processor 184b controls the power conversion circuit 182 to block the power supplied to the LED module 10, so that the LED module 10 is turned off.

After the switch 122 is pressed, the phase angle detection circuit 184a detects that the waveform of the electric energy output by the phase angle control module 16 has the delayed conduction angle, and the processor 184b judges that the switch 122 is pressed by a press time and control accordingly.

When the pressing time is less than a predetermined time (set to 1.2 seconds in this embodiment), the processor 184b switches to the full-brightness lighting mode, so that the LED module 10 produces bright light with maximum brightness.

After pressing the switch 122 again for less than the predetermined time, the processor 184b switches to the default lighting mode, so that the LED module emits bright light with the default brightness value.

After pressing the switch 122 again for less than the predetermined time, the processor 184b controls the power conversion circuit 182 to block the power supply to the LED module 10, so that the LED module 10 is turned off.

When the user needs to change the preset brightness value, the processor 184b switches to the brightness adjustment mode after pressing the switch 122 for more than the predetermined time, so that the user can change the preset brightness value.

Through the above-mentioned structure, when the LED lighting system 1 is applied to a building, the switch 122 and the phase angle control module 16 can be installed on the wall of the building (that is, installed on a control terminal), and the The driving module 18 and the LED module 10 are installed on the wall or ceiling of the building (ie installed on a load end). In this way, the phase angle control module 16 and the drive module 18 only need to be connected with two wires connected to the AC power supply S. In other words, the waveform corresponding to the state of the switch 122 can be transmitted to the driving module 18 , and the driving module 18 can judge the state of the switch 122 , and send a corresponding electric signal to control the LED module 10 .

The aforementioned installation method is just an application example and is not limited thereto, and the installation positions of each component can be adjusted according to actual needs.

In practice, the LED module 10 may include a plurality of first LEDs and a plurality of second LEDs, and the light color of the first LEDs is different from that of the second LEDs. For example, the light color of the first LED is cold color (such as white light, blue light, etc.), and the light color of the second LED is warm light color (such as yellow light, red light, etc.).

The power conversion circuit 182 of the drive module 18 can individually control the brightness ratio of the first LED and the second LED, and the brightness ratio refers to the bright light generated by the first and second LEDs. The ratio of the luminance value to the maximum luminance value or the preset luminance value, the color temperature of the bright light generated by the LED module 10 can be adjusted by matching the brightness ratio of the first LED and the second LED.

In the control mode of the processor 184b, the full-bright lighting mode includes a first brightness ratio information, and the first brightness ratio information records the brightness ratio of the first and second LEDs in the full-bright lighting mode. The default lighting mode includes a second brightness ratio information, and the second brightness ratio information records the brightness ratio of the first and second LEDs when the default lighting mode is recorded.

The control mode of the processor 184b also includes a hue adjustment mode for adjusting the first ratio information or the second ratio information. When the processor 184b is operating in the full-bright lighting mode or the default lighting mode, the user continues to press the on switch 122 for another set time (4 seconds in this embodiment), and the operating mode of the processor is switched. to the hue adjustment mode. in:

The chromaticity adjustment mode is to control the power conversion circuit 182 to drive the LED module 10 to generate bright light, and to repeatedly change the brightness of the LED module 10 under the condition that the brightness value (ie, the maximum brightness value or the preset brightness value) remains unchanged. The brightness ratio of the first light-emitting diode and the second light-emitting diode until the processor 184b judges that the state of the switch 122 changes, stops controlling the change of the brightness ratio of the first and second light-emitting diodes, and records The current brightness ratio of the first and second light-emitting diodes, and the recorded brightness ratio will replace the original first brightness ratio information of the full-brightness lighting mode or the original second brightness ratio information of the default lighting mode, and drive all The first and second light emitting diodes generate bright light with a new brightness ratio.

Thus, the user only needs to press the switch 122 for a long time to switch the brightness and choose to adjust the brightness or adjust the chromaticity.

Other preferred and feasible embodiments are provided below, which also have the same above-mentioned effects.

Figure 2 shows the LED lighting system 2 of the second preferred embodiment of the present invention, which is based on the structure of the first embodiment above, and a switch 20 is added to electrically connect the AC power source S and the AC power source respectively. The phase angle control module 16 . The switch 20 is used to turn on and off the bright light of the LED module 10 .

In this embodiment, when the switch 20 is turned on, the processor 184b of the driving module 18 operates in the full-bright lighting mode, so that the light of the LED module 10 is the brightest. Similarly, by pressing the switch 122 for a long time, the default lighting mode and the full-brightness lighting mode can be switched, and the brightness adjustment mode or the chromaticity adjustment mode can also be switched.

What Fig. 3 shows is the LED lighting system 3 of the third preferred embodiment of the present invention, which is based on the structure of the second embodiment above, the difference is that the input interface 22 of this embodiment includes two switches 222, 224 , the two switches 222 and 224 are electrically connected to the phase angle control module 16 . When each of the switches 222, 224 is pressed to be in a short-circuit state, the phase angle control module 16 makes the positive half-wave cycle of the waveform of the AC power source S generate the delayed conduction angle and then output it, and press each of the switches 222, 224. The resulting angle of this delayed conduction angle varies. Thus, the processor 184b can use the delayed conduction angle detected by the phase angle detection circuit 184a to correspond to the pressed state of the switches 222 and 224 to switch between the control modes.

For example, a short press of the switch 222 (that is, the pressing time is less than the set time) is used as a switch between the full-bright lighting mode and the default lighting mode; a long press of the switch 222 (that is, the pressing time is longer than the set time ), then switch to the brightness adjustment mode.

The processor 184b can also have a plurality of built-in preset chromaticity, and each preset chromaticity corresponds to a brightness ratio of the first and second LEDs. In the full-brightness lighting mode or the default lighting mode, short press the switch 224 to switch one of the preset chromaticity, and replace the preset chromaticity with the first brightness ratio information or the second brightness originally stored proportional information, and drive the first and second light emitting diodes to generate bright light with a new brightness ratio.

In addition, in the full-brightness lighting mode or the default lighting mode, long press the switch 224 to switch to the chromaticity adjustment mode to adjust the chromaticity of the LED module 10 .

What Fig. 4 shows is the LED lighting system 4 of the fourth preferred embodiment of the present invention, which has substantially the same structure as the above-mentioned second embodiment, the difference is that the input interface 24 of this embodiment includes three switches 242, 244 , 246 , the three switches 242 , 244 , 246 are electrically connected to the phase angle control module 16 . When each of the switches 242 , 244 , 246 is pressed, the phase angle control module 16 generates the delayed conduction angle corresponding to the specific angle of each of the switches 242 , 244 , 246 . In addition, the LED lighting system 4 of this embodiment includes three sets of driving modules 262, 264, 266, and LED modules 282, 284, 286. By delaying the conduction angle, each of the driving modules 262 , 264 , 266 can correspondingly detect the pressing state of each of the switches 242 , 244 , 246 , and then control each of the LED modules 282 , 284 , 286 .

For example, when the switch 242 is pressed, the driving module 262 detects the angle corresponding to the delayed conduction angle and calculates the pressing time to control the LED module 282 .

Of course, the number of switches of the input interface 24 in this embodiment is not limited to three, and more than three can also be set, and the same number of drive modules and light-emitting diode modules are correspondingly set at the load end, which can also achieve control The purpose of controlling multiple groups of light-emitting diode modules at the terminal.

In addition, in order to match the layout of the building, the LED lighting system of the above-mentioned first embodiment can also be designed as a connection method as shown in FIG. In different positions, thus, the user can control the LED module 10 in different positions. Based on the same idea, the LED lighting systems of the second, third, and fourth embodiments can also be designed as the connection modes shown in Fig. 6 to Fig. 8 respectively, and the two sets of three-way switches 29, the phase angle control module 16 and the input interfaces 12, 22, 24 are arranged at different positions in the building, so that the user can control the LED modules at different positions.

FIG. 9 shows an LED lighting system 5 according to a fifth preferred embodiment of the present invention, which includes a switch 30 , an input interface 32 , a phase angle control module 34 , a driving module 36 and an LED module 38 . The input interface 32 includes a variable resistor 322, and the phase angle control module 34 is electrically connected to the variable resistor 322, and generates an angle corresponding to the resistance value of the variable resistor 322 according to the resistance value of the variable resistor 322. The delay conduction angle. In this embodiment, the larger the resistance value of the variable resistor 322, the larger the angle corresponding to the delayed conduction angle; on the contrary, the smaller the resistance value, the smaller the angle of the delayed conduction angle, even if the variable resistor The resistance value of 322 is adjusted to 0 ohms, and the angle of the delayed conduction angle is greater than zero, that is, the delayed conduction angle still exists in the waveform of the electric energy output by the phase angle control module 34 .

The processor 362 of the driving module 36 calculates the resistance value of the variable resistor 322 according to the angle of the delayed conduction angle detected by the phase angle detection circuit 364 . The change of the resistance value is used to control the power conversion circuit 366 to output a corresponding electrical signal to the LED module 38 for control. For example, the brightness of the LED module 38 can be adjusted by changing the resistance value, or the chromaticity of the LED module 38 can be adjusted.

The light-emitting diode lighting systems in the above embodiments are only used to illustrate the power waveform transmission signal method of the present invention. In addition to being applied to light-emitting diode lighting systems, the present invention can also be applied to other load control systems, such as motor control The system uses the phase signal transmission device to transmit the state of the input interface of the control terminal to the load terminal to control the start, stop and speed of the motor. In addition, the present invention can also be applied to control loads of various electrical products such as bathroom heaters, exhaust fans, and ceiling fans.

According to the above, the present invention uses the phase signal transmission device composed of the phase angle control module and the drive module to transmit the state of the input interface from the control terminal to the load terminal through the delayed conduction angle of the power waveform to output the corresponding input interface state The electrical signal of the load is controlled, that is, the waveform of the AC power source is used to transmit the signal. Compared with the traditional signal transmission method, the present invention does not need to add additional wiring or use a wireless signal transmission device to transmit signals, thereby effectively reducing the cost of wiring.

The above descriptions are only preferred feasible embodiments of the present invention, not all possible implementations of the present invention. All changes in equivalent structures and methods made by applying the description of the present invention and the scope of the patent application should be included in the scope of the claims of the present invention.

Claims (10)

1. one kind is utilized the method for power supply wave shape signal transmission, be applied to a load control system, this load control system includes a phase angle control module and a driver module of mutual electric connection, this phase angle control module is electrically connected an AC power and an input interface, this driver module is electrically connected a load, and the method includes lower step:

A. this phase angle control module is detected the state of this input interface;

B. this phase angle control module, according to the state of detecting in steps A, changes the waveform of this AC power, exports after making the wherein half wave cycles of the waveform of this AC power have a turn on delay angle;

C. this driver module receives the electric energy of this phase angle control module output, and has after this turn on delay angle existence in the waveform of electric energy that judges this phase angle control module output, judges the state of this input interface according to this turn on delay angle; And

The state of this input interface that D. this driver module judges according to step C, exports the electric signal of a pair of state that should input interface to this load.

2. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein this input interface includes a switch, when this switch is pressed and be short-circuit condition, while being not pressed, be open-circuit condition, in steps A, press this switch and make this switch change into short-circuit condition by open-circuit condition, and whether judge according to the existence at this turn on delay angle whether this switch is pressed in step C.

3. the method for utilizing power supply wave shape signal transmission as claimed in claim 2, wherein this input interface includes multiple these switches, presses wherein this switch in steps A; In step B, this switch that the angle correspondence at the turn on delay angle producing is pressed; In step C, also comprise the angle of detecting this turn on delay angle, and judge corresponding this switch according to the angle at this turn on delay angle; In step D, the corresponding electric signal of corresponding this switch in step C is sent to this load.

4. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein this input interface includes a variable resistor, and this variable resistor can be controlled and be changed the state of its resistance value; In step B, the angle at this turn on delay angle is to should variable-resistance resistance value; In step C, judge this variable-resistance resistance value according to the angle at this turn on delay angle; In step D, will electric signal that should variable-resistance resistance value be sent to this load.

5. the method for utilizing power supply wave shape signal transmission as claimed in claim 4, wherein this variable-resistance resistance value is 1 o'clock, the angle at this turn on delay angle is greater than zero degree.

6. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein this phase angle control module and this input interface are positioned at a control end, and this driver module and this load are positioned at a load end.

7. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein this turn on delay angle is the positive half-wave that results from the waveform of this AC power.

8. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein the maximum angle at this turn on delay angle is 90 degree.

9. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein includes in step C and converts the electric energy of this AC power to this load required electric energy.

10. the method for utilizing power supply wave shape signal transmission as claimed in claim 1, wherein this load is a light-emitting diode (LED) module.