Lamp with inductive power detection function

Abstract

The utility model discloses a lamp with an inductive power detection function, which comprises a switching power supply of which the input end is connected with commercial power, at least one driving circuit connected with the output end of the switching power supply, a control unit for controlling the driving circuit, and an inductive current detector for sensing and detecting the current of the input end of the switching power supply, and the inductive current detector is also connected with the control unit. The current of the input end of the switching power supply, namely the input current of the whole lamp, is indirectly detected through the inductive current detector, and the real-time power of the whole lamp instead of the power of only one or more functional modules can be calculated by combining the commercial power voltage, so that the loss of the switching power supply in the conversion process is avoided, and the service life of the whole lamp is prolonged. And the detection result is more accurate. In addition, the induction type current detector is adopted, strong and weak current isolation can be achieved, and the situation that a circuit in the lamp is directly connected to the mains supply and damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, and more specifically, to a lamp with an inductive power detection function. Background Art

[0002] Currently, general lamps do not have a power detection function. Only the rated power is detected by power detection equipment before leaving the factory. During the use of the lamp, it is impossible to know its real-time power and cumulative power consumption. However, now environmental protection behaviors such as zero carbon emissions and carbon trading are advocated. Some performances have requirements for energy consumption statistics of performance equipment to meet carbon trading and zero carbon emissions.

[0003] Very few lamps will be equipped with power detection equipment inside the lamp, but usually it is for the power detection of one or more functional modules, and it is impossible to obtain the power of the whole lamp, which is not convenient for counting the real-time power or cumulative power consumption of the whole lamp. Summary of the Utility Model

[0004] The utility model aims to overcome at least one of the above-mentioned defects in the prior art, and provides a lamp with an inductive power detection function, which can detect the current of the whole lamp at any time, so as to calculate its power.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a lamp with an inductive power detection function, including a switching power supply with an input end connected to the commercial power, at least one driving circuit connected to the output end of the switching power supply, and a control unit for controlling the driving circuit. It also includes an inductive current detector for detecting the current at the input end of the switching power supply, and the inductive current detector is also connected to the control unit.

[0006] The alternating commercial power is converted into direct current by the switching power supply inside the lamp to supply power to other functional modules inside the lamp. The lamp with an inductive power detection function indirectly detects the current at the input end of the switching power supply, that is, the input current of the whole lamp, through the inductive current detector. Then, combined with the commercial power voltage, the real-time power of the whole lamp of the lamp can be calculated, rather than just the power of one or more functional modules. At the same time, the loss existing in the conversion process of the switching power supply is avoided, making the detection result more accurate. In addition, by using the inductive current detector, strong and weak electricity isolation can be achieved, avoiding damage to the circuit inside the lamp directly connected to the commercial power.

[0007] Further, the inductive current detector includes an induction coil and a current-voltage converter. The induction coil induces an induction current at the input end of the switching power supply, and the current-voltage converter converts the induction current into a first voltage signal and sends it to the control unit. The induction current is only related to the coil turns ratio. Detecting the induction current facilitates the reverse deduction of the current at the input end of the switching power supply, and using the current-voltage converter to convert the induction current into a first voltage signal and send it to the control unit facilitates the recognition by the control unit.

[0008] Further, it also includes an inductive voltage detector for detecting the voltage at the input end of the switching power supply. The inductive voltage detector can detect the voltage at the input end of the switching power supply. In this way, even if the lamp is applied in different countries / regions or the voltage fluctuates in the same region, the power of the lamp can be calculated.

[0009] Further, the inductive voltage detector includes an induction coil, a current-voltage converter, and a current-limiting resistor with a known resistance value connected in parallel with the input end of the switching power supply. The induction coil induces an induction current in the branch where the current-limiting resistor is located, and the current-voltage converter converts the induction current into a second voltage signal and sends it to the control unit. Using the current-limiting resistor with a known resistance value can convert the detection of the mains voltage into the detection of the current in the branch where the current-limiting resistor is located. The induction current of the induction coil is only related to the coil turns ratio. Detecting the induction current facilitates the reverse deduction of the current flowing through the current-limiting resistor, and using the current-voltage converter to convert the induction current into a second voltage signal and send it to the control unit facilitates the recognition by the control unit.

[0010] Further, a varistor for preventing overvoltage of the current-limiting resistor is connected in parallel with the current-limiting resistor. It performs voltage clamping when the lamp withstands overvoltage and absorbs the excess current to protect sensitive components.

[0011] Further, two diodes are connected in reverse parallel at the low-voltage output end of the induction coil. After the current-voltage converter is damaged, it can protect the induction coil from high-voltage damage.

[0012] Further, the current-voltage converter includes an operational amplifier. The positive input terminal and the negative input terminal of the operational amplifier are connected to both ends of the induction coil, the output terminal of the operational amplifier is connected to the control unit, and a conversion resistor is connected between the positive input terminal and the output terminal of the operational amplifier. Using the operational amplifier and the conversion resistor can achieve the conversion of the current signal into a voltage signal, and by adjusting the size of the conversion resistor, signal scaling can be performed as needed, facilitating the recognition by the control unit.

[0013] Further, the drive circuit is a motor drive, a fan drive, or a light source drive, and is respectively used to drive the motor in the lamp to rotate, the fan to dissipate heat, and the light source to emit light.

[0014] Further, it further includes a storage unit for storing the standard drive power of each of the drive circuits under multiple drive instructions. By comparing the actual drive power of each of the drive circuits under the same drive instruction with the standard drive power, it is possible to determine whether the corresponding driven component is damaged.

[0015] Further, it further includes a display screen for displaying the detection result of the inductive current detector, the real-time power of the lamp calculated according to the detection result, and / or the cumulative power consumption of the lamp. Using the display screen, it is convenient for the user to view the power consumption of the lamp.

[0016] Further, it further includes an Internet of Things module connected to the control unit. Using the Internet of Things module, the power consumption information of the lamp can be uploaded, facilitating remote recording, viewing, or analysis. Description of the Drawings

[0017] Figure 1 is a schematic circuit structure diagram of the present utility model for detecting the current at the input end of the switching power supply.

[0018] Figure 2 is a schematic circuit structure diagram of the present utility model for detecting the voltage at the input end of the switching power supply.

[0019] Figure 3 is a schematic overall structure diagram of the present utility model for the lamp.

[0020] Figure 4 is a schematic internal structure diagram of the present utility model for the lamp.

[0021] In the figure:

[0022] 100, switching power supply; 200, drive circuit; 300, control unit; 400, inductive current detector; 410, current-voltage converter; 500, inductive voltage detector; 610, lamp cap; 620, arm; 630, chassis; 710, motor; 720, fan; 730, light source; 810, storage unit; 820, display screen; 830, Internet of Things module. Detailed Embodiments

[0023] The drawings are only for illustrative purposes and should not be construed as limitations on this patent; for better illustrating this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and should not be construed as limitations on this patent.

[0024] As Figure 1 , the present utility model provides a lamp with an inductive power detection function, which includes a switching power supply 100 with an input end connected to the mains, at least one driving circuit 200 connected to the output end of the switching power supply 100, and a control unit 300 for controlling the driving circuit 200. It further includes an inductive current detector 400 for inductively detecting the current at the input end of the switching power supply 100, and the inductive current detector 400 is also connected to the control unit 300.

[0025] After the AC mains is converted into DC by the switching power supply 100 inside the lamp, it supplies power to other functional modules inside the lamp. For the lamp with an inductive power detection function, the inductive current detector 400 indirectly detects the current at the input end of the switching power supply 100, that is, the input current of the whole lamp. Then, combined with the mains voltage, the real-time power of the whole lamp can be calculated, rather than just the power of one or more functional modules. At the same time, the loss existing in the conversion process of the switching power supply 100 is avoided, making the detection result more accurate. In addition, by using the inductive current detector 400, the isolation between strong and weak electricity can be achieved, avoiding the damage of the circuit inside the lamp directly connected to the mains.

[0026] In a preferred embodiment of the present utility model, the inductive current detector 400 includes an induction coil T1 and a current-voltage converter 410. The induction coil T1 induces an induction current at the input end of the switching power supply 100, and the current-voltage converter 410 converts the induction current into a first voltage signal and sends it to the control unit 300. The induction current is only related to the coil turn ratio. Detecting the induction current is convenient for inversely inferring the current at the input end of the switching power supply 100, and using the current-voltage converter 410 to convert the induction current into a first voltage signal and send it to the control unit 300 is convenient for the control unit 300 to identify.

[0027] As Figure 2 , in a preferred embodiment of the present utility model, it further includes an inductive voltage detector 500 for detecting the voltage at the input end of the switching power supply 100. The inductive voltage detector 500 can detect the voltage at the input end of the switching power supply 100. In this way, even if the lamp is applied in different countries / regions, or the voltage fluctuates in the same region, the power calculation of the lamp can be carried out.

[0028] In a preferred embodiment of the present utility model, the inductive voltage detector 500 includes an induction coil T2, a current-voltage converter 410, and a current-limiting resistor R2 with a known resistance value connected in parallel with the input end of the switching power supply 100. The induction coil T2 induces an induction current in the branch where the current-limiting resistor R2 is located, and the current-voltage converter 410 converts the induction current into a second voltage signal and sends it to the control unit 300. By using the current-limiting resistor R2 with a known resistance value, the detection of the mains voltage can be converted into the detection of the current in the branch where the current-limiting resistor R2 is located. The induction current of the induction coil T2 is only related to the coil turn ratio. Detecting the induction current facilitates the inverse derivation of the current flowing through the current-limiting resistor R2, and by using the current-voltage converter 410 to convert the induction current into a second voltage signal and send it to the control unit 300, it is convenient for the control unit 300 to identify.

[0029] In a preferred embodiment of the present utility model, varistors VR1 and VR2 for preventing overvoltage of the current-limiting resistor R2 are connected in parallel with the current-limiting resistor R2. Voltage clamping is performed when the lamp fixture is subjected to overvoltage to protect the sensitive components of the subsequent circuit.

[0030] Preferably, two varistors VR1 and VR2 are connected in parallel with the current-limiting resistor R2 to enhance lightning protection and spike voltage protection. And one of the varistors VR1 is connected in parallel with the current-limiting resistor R2 after being connected in series with a ceramic gas discharge tube V1, which works complementarily with the ceramic gas discharge tube V1 to improve the surge and lightning protection ability.

[0031] Generally, the ceramic gas discharge tube V1 has advantages such as small volume, large current capacity, and small inter-electrode capacitance. However, in the application of lightning protection, it actually faces the problem that the continuous current cannot be turned off; while the general varistor VR1 has a large current capacity and relatively low cost, but in the application of lightning protection, it will face problems such as breakdown and short circuit leading to fire. Therefore, using the two in series can make the ceramic gas discharge tube V1 and the varistor VR1 complementary. In the whole process, the roles played by the two are as follows: 1. The ceramic gas discharge tube V1 acts as a switch. In the absence of transient overvoltage, it can isolate the varistor VR1 from the system, making the varistor VR1 have almost no leakage current, effectively alleviating the performance degradation of the varistor VR1. 2. In the transient overvoltage device, since the reference voltage Uima of the varistor VR1 is selected to be relatively low, as long as the ceramic gas discharge tube V1 can be quickly discharged and conducted, the series branch can give a lower clamping voltage than a single varistor VR1, thus achieving the function of surge and lightning protection.

[0032] Such as Figure 3, the lamp includes a lamp head 610, an arm 620 that supports the rotation of the lamp head 610, and a chassis 630 that supports the rotation of the arm 620. The switching power supply 100, the inductive current detector 400, the control unit 300, and the inductive voltage detector 500 are all located in the chassis 630, and the drive circuit 200 is located in the lamp head 610, the arm 620, and / or the chassis 630.

[0033] Such as Figure 1 , Figure 2 , in a preferred embodiment of the present invention, the low-voltage output terminals of the induction coils T1 and T2 are reversely connected in parallel with two diodes D1, D2 or D3, D4. After the current-voltage converter 410 is damaged, the induction coils T1 and T2 can be protected from high-voltage damage.

[0034] The form of the current-voltage converter 410 has various types. In a preferred embodiment of the present invention, the current-voltage converter 410 includes operational amplifiers U1 and U2. The positive input terminals and negative input terminals of the operational amplifiers U1 and U2 are connected to both ends of the induction coils T1 and T2. The output terminals of the operational amplifiers U1 and U2 are connected to the control unit 300. A conversion resistor R1, R3 is connected between the positive input terminal and the output terminal of the operational amplifiers U1 and U2. By using the operational amplifiers U1 and U2 and the conversion resistors R1 and R3, the current signal can be converted into a voltage signal, and the signal can be scaled as needed by adjusting the sizes of the conversion resistors R1 and R3, which is convenient for the control unit 300 to identify.

[0035] Preferably, the supply voltage of the operational amplifiers U1 and U2 is 3.3V, and the negative input terminal of the operational amplifiers U1 and U2 is connected to a 1.65V voltage.

[0036] Such as Figure 4 , in a preferred embodiment of the present invention, the drive circuit 200 is a motor 710 drive, a fan 720 drive, or a light source 730 drive. They are respectively used to drive the rotation of the motor in the lamp, the heat dissipation of the fan, and the light emission of the light source.

[0037] Generally speaking, there is only one light source 730 in the lamp (there may also be multiple in special cases), while there can be dozens of motors 710 and fans 720. The motor 710 is usually used to drive the translation, rotation, or swing of the lamp head 610, the arm 620, the stroboscope, the cutter, the CMY, the color filter disc, the pattern disc, the aperture, the atomizing sheet, the prism, the focusing lens, or the magnifying glass.

[0038] Such as Figure 1 , Figure 2, in a preferred embodiment of the present utility model, it further includes a storage unit 810 for storing the standard driving powers of each of the driving circuits 200 under a plurality of driving instructions. By comparing the actual driving power of each driving circuit 200 under the same driving instruction with the standard driving power, it can be determined whether the corresponding driven component is damaged.

[0039] When, under the same driving instruction, the difference between the actual driving power and the standard driving power exceeds a limit value (it can be that the actual driving power is larger or the standard driving power is larger), it is considered that the driven component is damaged.

[0040] If multiple driving circuits 200 work simultaneously, then it is possible to compare the sum of the standard driving powers of each driving circuit 200 under the current driving instruction with the sum of the actual driving powers to determine whether there is a damaged driven component among them, or further determine which driving component is damaged according to the amount exceeding the limit value. When necessary, each driving circuit 200 is controlled to work one by one, while other driving circuits 200 stop working, so as to determine which driving component is damaged.

[0041] Such as Figures 1 to 4 , in a preferred embodiment of the present utility model, it further includes a display screen 820 for displaying the detection result of the inductive current detector 400, the real-time power of the lamp calculated according to the detection result, and / or the cumulative power consumption of the lamp. Using the display screen 820 can facilitate the user to view the power consumption situation of the lamp.

[0042] Such as Figure 1 、 Figure 2 , in a preferred embodiment of the present utility model, it further includes an Internet of Things module 830 connected to the control unit 300. Using the Internet of Things module 830, the power consumption information of the lamp can be uploaded, which is convenient for remote recording, viewing, or analysis.

[0043] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A lamp with an inductive power detection function, characterized in that, It includes a switching power supply (100) with its input terminal connected to the mains power, at least one driving circuit (200) connected to the output terminal of the switching power supply (100), and a control unit (300) for controlling the driving circuit (200). It also includes an inductive current detector (400) for inductively detecting the current at the input terminal of the switching power supply (100), and the inductive current detector (400) is also connected to the control unit (300).

2. The luminaire with an inductive power detection function according to claim 1, characterized in that, The inductive current detector (400) includes an inductive coil (T1) and a current-voltage converter (410). The inductive coil (T1) induces an inductive current at the input terminal of the switching power supply (100), and the current-voltage converter (410) converts the inductive current into a first voltage signal and sends it to the control unit (300).

3. The luminaire with inductive power detection function according to claim 1, wherein It also includes an inductive voltage detector (500) for detecting the voltage at the input terminal of the switching power supply (100).

4. The luminaire with an inductive power detection function according to claim 1, characterized in that, The inductive voltage detector (500) includes an inductive coil (T2), a current-voltage converter (410), and a current-limiting resistor (R2) with a known resistance value connected in parallel with the input terminal of the switching power supply (100). The inductive coil (T2) induces an inductive current in the branch where the current-limiting resistor (R2) is located, and the current-voltage converter (410) converts the inductive current into a second voltage signal and sends it to the control unit (300).

5. The lamp with an inductive power detection function according to claim 4, characterized in that, A varistor (VR1, VR2) for preventing overvoltage of the current-limiting resistor (R2) is connected in parallel with the current-limiting resistor (R2).

6. The luminaire with inductive power detection function according to claim 2 or 4, characterized in that, Two diodes (D1, D2 or D3, D4) are connected in reverse parallel at the low-voltage output terminals of the inductive coils (T1, T2).

7. The luminaire with inductive power detection function according to claim 2 or 4, characterized in that, The current-voltage converter (410) includes operational amplifiers (U1, U2). The positive input terminals and negative input terminals of the operational amplifiers (U1, U2) are connected to both ends of the inductive coils (T1, T2). The output terminals of the operational amplifiers (U1, U2) are connected to the control unit (300), and a conversion resistor (R1, R3) is connected between the positive input terminal and the output terminal of the operational amplifiers (U1, U2).

8. The lamp with an inductive power detection function according to claim 1, characterized in that, The driving circuit (200) is a motor drive, a fan drive, or a light source drive.

9. The luminaire with inductive power detection function according to claim 1, characterized in that, It also includes a storage unit (810) for storing the standard driving power of each driving circuit (200) under multiple driving instructions respectively.

10. The lamp with an inductive power detection function according to claim 1, characterized in that, It also includes a display screen (820) for displaying the detection result of the inductive current detector (400), the real-time power of the lamp calculated according to the detection result, and / or the cumulative power consumption of the lamp.

11. The luminaire with an inductive power detection function according to claim 1, characterized in that, It also includes an Internet of Things module (830) connected to the control unit (300).

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