CN114120896B - LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump - Google Patents
LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump Download PDFInfo
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- CN114120896B CN114120896B CN202111474740.5A CN202111474740A CN114120896B CN 114120896 B CN114120896 B CN 114120896B CN 202111474740 A CN202111474740 A CN 202111474740A CN 114120896 B CN114120896 B CN 114120896B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
Abstract
The invention discloses an LED (light emitting diode) indicating HPB (high-performance B) bearing wear gauge for a shield pump, which belongs to the technical field of bearing wear gauges and comprises an LED module for displaying numerical values and a J1 terminal, wherein one path of the J1 terminal is connected with a voltage boosting and stabilizing circuit, the other path of the J1 terminal is connected with a linear amplification comparison output circuit, and the voltage boosting and stabilizing circuit is also connected with the linear amplification comparison output circuit. The LED indicating HPB bearing wear gauge head for the shield pump adopts two LM3914 linear LED level driving chips, is changed into a 20-section level driving circuit after conversion and combination to drive an LED indicating lamp to emit light, realizes the LED display function through the LED indicating lamp, solves the problems of the background art, has good precision, shock resistance and temperature resistance, and greatly prolongs the service life due to the use of the LED lamp beads.
Description
Technical Field
The invention relates to the technical field of bearing wear gauge heads, in particular to an LED (light emitting diode) HPB (hot plug band) bearing wear gauge head for a canned motor pump.
Background
The conventional HPB indicating bearing wear gauge head is a simulation pointer gauge head, after vibration during field assembly and transportation, the simulation pointer bends due to inertia, a mechanical hairspring is clamped, the pointer cannot freely swing and the like, and the damage rate is high due to the fact that the simulation pointer is a mechanical product.
And the analog pointer header also has the following problems:
1. the mechanical part of the analog pointer gauge head is easy to damage after being easily subjected to external force;
2. the analog pointer indication is not visual;
3. the analog pointer needs to be periodically zeroed;
4. the precision of the analog gauge head is not high.
Disclosure of Invention
The invention aims to provide an LED indicating HPB bearing wear gauge head for a canned motor pump, which aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump, includes the LED module and the J1 terminal that show numerical value, and one way of J1 terminal is connected and is stepped up voltage stabilizing circuit, and another way of J1 terminal is connected linear amplification comparison output circuit to step up voltage stabilizing circuit also is connected with linear amplification comparison output circuit.
Furthermore, pins 5 and 4 of the MT3608 current mode boost converter U1 in the boost voltage stabilizing circuit are connected with a parallel connection port of a capacitor C10, an inductor L1 and the cathode of a diode D1, and pin 2 and pin 6 of the MT3608 current mode boost converter U1 are connected with a capacitor C10, a capacitor C1, a J1 terminal pin 2, a resistor R3, a capacitor C7, a capacitor C11, a capacitor C2, a capacitor C8, a resistor R6, a controllable precision voltage stabilizing source U2, a capacitor C3 and a capacitor C12 which are grounded in common;
the anode of the diode D1 is connected with the other end of the capacitor C1, the pin 1 of the J1 terminal is connected with the anode of the LM258 operational amplifier U5A chip;
the other ends of the capacitor C8 and the resistor R6 are connected with a common interface of a controllable precise voltage-stabilizing power supply U2 and a sliding variable resistor RP1, and the other end of the sliding variable resistor RP1 is connected with the other end of the resistor R5;
the other point of the resistor R2 is connected in parallel with pin 3 of the MT3608 current-mode boost converter U1, the resistor R3 and the capacitor C7.
Further, the negative electrode of the LM258 operational amplifier U5A chip in the linear amplification comparison output circuit is connected with the parallel connection ports of the resistor R8, the capacitor C9, the resistor R7 and the capacitor C6, and the other end of the resistor R7 is connected with 10V voltage; the other ends of the resistor R8 and the capacitor C9 are connected to the output end of the LM258 operational amplifier U5A chip and the parallel connection port of the resistor R1;
a pin 8 of the LM258 operational amplifier U5A chip, a pin 8 of the LM258 operational amplifier U5B chip, a pin 3 of an LM3914 linear LED level driving chip and an LED2-LED21 are connected to VCC in parallel;
a pin 4 of the LM258 operational amplifier U5A chip, a pin 4 of the LM258 operational amplifier U5B chip, a capacitor C13, a capacitor C6 and a resistor R9 are grounded in parallel;
the other end of the resistor R1, the capacitor C13 and the other end of the resistor R9 are connected to the positive end of the LM258 operational amplifier U5B chip, and the negative electrode of the LM258 operational amplifier U5B chip and the output end of the LM258 operational amplifier U5B chip are connected to the end angle 5 of the LM3914 linear LED level driving chip U3 and the LM3914 linear LED level driving chip U4 in parallel;
the end angles 6 and 7 of the LM3914 linear LED level driving chip U3 are connected with one end of a resistor R11 in parallel, the other end of the resistor R11 is connected with the end angle 8 of the LM3914 linear LED level driving chip U3, a parallel connection port of a capacitor C4 and a resistor R10 in parallel, the other end of the resistor R10 is connected with the end angle 2 of the LM3914 linear LED level driving chip U3 in parallel and is grounded, and the end angle 4 of the LM3914 linear LED level driving chip U3 is connected with the end angle 6 of the LM3914 linear LED level driving chip U4;
the end corner 7 series resistor R12 of the LM3914 linear LED level driving chip U4 and the end corners 2, 4 and 8 of the LM3914 linear LED level driving chip U4 are grounded in parallel, and the pins 1 and 10-18 of the LM3914 linear LED level driving chip U3 and the LM3914 linear LED level driving chip U4 are respectively connected with the LEDs 2-LED 21.
Further, the LED module comprises an LED2-LED21, the LED2-LED21 are controlled by two LM3914 linear LED level driving chips, the LED2-LED21 are converted and combined into 20 sections of level driving circuits to drive the LED module for LED display, and the LED1 series resistor R13 is connected with VCC to form a power indicator lamp.
Further, the MT3608 current mode boost converter U1 turns on the MOSFET by controlling the inside, and outputs a PWM square wave through 1 pin to be added to the inductor L1 to generate an oscillating boost voltage, and then outputs a constant 12V dc voltage through the diode D2, the resistor R2 and the resistor R3 are output voltage sampling resistors, and output voltage formula: o ═ 0.6V (1+ R2/R3)
0.6V is a reference voltage provided inside the chip, a 12V direct-current voltage source is output in two paths, one path supplies power to the LM3914 linear LED level driving chips U3 and U4, and the other path outputs a reference 10V direct-current voltage serving as a reference voltage source of the U5 comparator after being stabilized by the voltage from R1 to U2(TL 431).
Further, the LM258 operational amplifier U5A chip outputs 0-10V voltage, the voltage is divided into 0-1.25V through resistors R7 and R8 and then input to the anode of the LM258 operational amplifier U5B chip, and the 0-1.25V voltage output by the LM258 operational amplifier U5B chip is respectively input to pins 5 of an LM3914 linear LED level driving chip U3 and U4; when the voltage of the 5 pins of the LM3914 linear LED level driver chips U3 and U4 is 0 to 1.25V input, the 1,10 to 18 pins of the LM3914 linear LED level driver chips U3 and U4 output according to the voltage of the 5 pin input, and drive the LEDs 2 to LED21 to emit light.
Compared with the prior art, the invention has the beneficial effects that:
according to the LED indicating HPB bearing wear gauge for the shield pump, 12V direct-current voltage sources are output in two paths, one path is used for supplying power to LM3914 linear LED level driving chips U3 and U4, the other path is used for outputting reference 10V direct-current voltage as a reference voltage source of a U5 comparator after being stabilized by R1 to U2(TL431), two LM3914 linear LED level driving chips are adopted and are converted and combined into 20 sections of level driving circuits to drive an LED indicating lamp to emit light, the LED indicating lamp realizes an LED display function, the problem of the background technology is solved, and the LED indicating lamp has good precision, good anti-shock and temperature resistance, and the service life is greatly prolonged due to the use of LED lamp beads.
Drawings
FIG. 1 is a circuit diagram of a boost voltage regulator circuit according to the present invention;
FIG. 2 is a circuit diagram of a linear amplification comparison output circuit of the present invention;
FIG. 3 is a first simulation test circuit diagram of the present invention;
FIG. 4 is a second circuit diagram of the simulation test of the present invention.
In the figure: 1. a voltage boosting and stabilizing circuit; 2. and a linear amplification comparison output circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, an LED wear gauge for indicating HPB bearing wear for a shield pump includes an LED module for displaying a numerical value and a J1 terminal, one of the J1 terminals is connected to a voltage boost regulator circuit 1, the other of the J1 terminals is connected to a linear amplification comparison output circuit 2, and the voltage boost regulator circuit 1 is also connected to the linear amplification comparison output circuit 2.
the anode of the diode D1 is connected with the other end of the capacitor C1, the pin 1 of the J1 terminal is connected with the anode of the LM258 operational amplifier U5A chip;
the other ends of the capacitor C8 and the resistor R6 are connected with a common interface of a controllable precise voltage-stabilizing power supply U2 and a sliding variable resistor RP1, and the other end of the sliding variable resistor RP1 is connected with the other end of the resistor R5;
the other point of the resistor R2 is connected in parallel with pin 3 of the MT3608 current mode boost converter U1, a resistor R3 and a capacitor C7.
The voltage boosting circuit is characterized in that a terminal J1 inputs a 5-10 VDC direct-current voltage signal and outputs the signal through two paths, a first path of capacitor C1 (is anti-interference), a diode (D1 is designed for preventing reverse connection) enters a pin 5 of an MT3608 current mode boosting converter U1 to supply power to a chip, the MT3608 current mode boosting converter U1 is a constant-frequency 6-pin SOT23 packaged current mode boosting converter, the switching frequency of the MT3608 current mode boosting converter U1 is 1.2MHz, an MOSFET is opened through control, 1 pin outputs a PWM square wave to be added on an inductor L1 to generate oscillation boosting, then a constant 12V direct-current voltage is output through the diode D2, a resistor R2 and a resistor R3 are output voltage sampling resistors, and an output voltage formula is as follows: o ═ 0.6V (1+ R2/R3)
0.6V is a reference voltage provided inside the chip, a 12V direct-current voltage source is output in two paths, one path of voltage is used for supplying power to the LM3914 linear LED level driving chips U3 and U4, and the other path of voltage is regulated by R1 to U2(TL431) and then outputs a reference 10V direct-current voltage to be used as a reference voltage source of the U5 comparator.
Referring to fig. 2, the negative electrode of the LM258 operational amplifier U5A chip in the linear amplification comparison output circuit 2 is connected to the parallel connection port of the resistor R8, the capacitor C9, the resistor R7 and the capacitor C6, and the other end of the resistor R7 is connected to 10V voltage; the other ends of the resistor R8 and the capacitor C9 are connected with the output end of the LM258 operational amplifier U5A chip and the parallel connection port of the resistor R1;
a pin 8 of the LM258 operational amplifier U5A chip, a pin 8 of the LM258 operational amplifier U5B chip, a pin 3 of the LM3914 linear LED level driving chip, and an LED2-LED21 are connected to VCC in parallel;
a pin 4 of the LM258 operational amplifier U5A chip, a pin 4 of the LM258 operational amplifier U5B chip, a capacitor C13, a capacitor C6 and a resistor R9 are grounded in parallel;
the other end of the resistor R1, the capacitor C13 and the other end of the resistor R9 are connected to the positive end of the LM258 operational amplifier U5B chip, and the negative electrode of the LM258 operational amplifier U5B chip and the output end of the LM258 operational amplifier U5B chip are connected to the end angle 5 of the LM3914 linear LED level driving chip U3 and the LM3914 linear LED level driving chip U4 in parallel;
the end angles 6 and 7 of the LM3914 linear LED level driving chip U3 are connected with one end of a resistor R11 in parallel, the other end of the resistor R11 is connected with the end angle 8 of the LM3914 linear LED level driving chip U3, a parallel connection port of a capacitor C4 and a resistor R10 in parallel, the other end of the resistor R10 is connected with the end angle 2 of the LM3914 linear LED level driving chip U3 in parallel and is grounded, and the end angle 4 of the LM3914 linear LED level driving chip U3 is connected with the end angle 6 of the LM3914 linear LED level driving chip U4;
the end corner 7 series resistor R12 of the LM3914 linear LED level driving chip U4 and the end corners 2, 4 and 8 of the LM3914 linear LED level driving chip U4 are grounded in parallel, and the pins 1 and 10-18 of the LM3914 linear LED level driving chip U3 and the LM3914 linear LED level driving chip U4 are respectively connected with the LEDs 2-LED 21.
The LED module comprises LED2-LED21, LED2-LED21 control two LM3914 linear LED level driving chips, become 20 sections of level driving circuit to drive the LED module and be used for LED to show through the transform combination, LED1 series resistance R13 connects the VCC and is the power indicator.
The second path enters a 3 pin plus end of an LM258 operational amplifier U5A chip, a standard 10V direct-current voltage source which is output after voltage stabilization is divided by a resistor R7 and a resistor R8, so that a 2 pin plus end of the LM258 operational amplifier U5A is kept at 5V by default, when a 3 pin plus end voltage input of the LM258 operational amplifier U5A chip is less than 5V, a low level of 0V is output by a 1 pin of the LM258 operational amplifier U5A chip, when the 3 pin plus end voltage input of the LM258 operational amplifier U5A chip is 5-10V, a 0-10V voltage is output by a 1 pin of the LM258 operational amplifier U5A chip, and is divided into 0-1.25V to be input to an 8 pin plus end of the LM258 operational amplifier U5B through a resistor R1 and a resistor R9, and a 0-1.25V voltage is output by a 7 pin of the LM258 operational amplifier U5B to be input to an LM3914 linear LED level driving chip U3 and a U4 pin of the LM 258.
The linear LED level driving chips U3 and U4 of LM3914 are internally provided with 10-level precision voltage comparators, the full-scale voltage is 1.25V, when the voltage of the 5 pins is 0-1.25V input, pins 1 and 10-18 of the linear LED level driving chips U3 and U4 of the LM3914 carry out corresponding output according to the voltage input by the 5 pins and drive the LEDs 2-21 to emit light, and the LED1 is a power indicator lamp.
The circuit has used two LM3914 linear LED level driver chip, becomes 20 sections level driver circuit through the transform combination and drives the LED pilot lamp luminous, shows the function through the realization LED of LED pilot lamp, has solved the problem of background art, has good precision, antidetonation, temperature resistant, owing to use LED lamp pearl, life promotes by a wide margin.
Referring to fig. 3-4, the circuit passes the test of the simulation software and passes the verification through the actual manufacturing, and the LED1 and the LED2 module emit light by changing the resistance value, so as to realize the LED display function.
In conclusion; according to the LED indicating HPB bearing wear gauge for the shield pump, 12V direct-current voltage source is output in two paths, one path is used for supplying power to LM3914 linear LED level driving chips U3 and U4, the other path is used for outputting reference 10V direct-current voltage as a reference voltage source of a U5 comparator after being stabilized by R1 to U2(TL431), two LM3914 linear LED level driving chips are adopted, 20 sections of level driving circuits are formed after conversion and combination to drive an LED indicating lamp to emit light, the LED indicating lamp realizes an LED display function, the problem of the background technology is solved, and the LED indicating lamp has good precision, shock resistance and temperature resistance, and the service life is greatly prolonged due to the use of the LED lamp beads.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. The LED-indicated HPB bearing wear gauge for the canned motor pump is characterized by comprising an LED module for displaying numerical values and a J1 terminal, wherein one way of the J1 terminal is connected with a voltage boosting and stabilizing circuit (1), the other way of the J1 terminal is connected with a linear amplification comparison output circuit (2), and the voltage boosting and stabilizing circuit (1) is also connected with the linear amplification comparison output circuit (2);
pins 5 and 4 of an MT3608 current mode boost converter U1 in the boost voltage stabilizing circuit (1) are connected with a parallel connection port of a capacitor C10, an inductor L1 and the cathode of a diode D1, and a pin 2 and a pin 6 of the MT3608 current mode boost converter U1 are connected with a capacitor C10, a capacitor C1, a J1 terminal pin 2, a resistor R3, a capacitor C7, a capacitor C11, a capacitor C2, a capacitor C8, a resistor R6, a controllable precise voltage stabilizing source U2, a capacitor C3 and a capacitor C12 which are grounded in common;
the anode of the diode D1 is connected with the other end of the capacitor C1, the pin 1 of the J1 terminal is connected with the anode of the LM258 operational amplifier U5A chip;
the other ends of the capacitor C8 and the resistor R6 are connected with a common interface of a controllable precise voltage-stabilizing power supply U2 and a sliding variable resistor RP1, and the other end of the sliding variable resistor RP1 is connected with the other end of the resistor R5;
pin 1 of the MT3608 current mode boost converter U1 is connected with a parallel connection port of the other end of the inductor L1 and the anode of the diode D2, and the cathode of the diode D2, the resistor R2, the capacitor C11, the capacitor C2 and the resistor R4 are connected to VCC voltage; the other end of the resistor R4, the resistor R5, the controllable precise voltage stabilizing source U2, the capacitor C3 and the capacitor C12 are connected to a voltage of 10V;
the other point of the resistor R2 is connected in parallel with pin 3 of the MT3608 current mode boost converter U1, a resistor R3 and a capacitor C7.
2. The LED indicating HPB bearing wear gauge for the canned motor pump as claimed in claim 1, wherein the negative electrode of the chip LM258 operational amplifier U5A in the linear amplification comparison output circuit (2) is connected with the parallel interface of the resistor R8, the capacitor C9, the resistor R7 and the capacitor C6, and the other end of the resistor R7 is connected with 10V voltage; the other ends of the resistor R8 and the capacitor C9 are connected to the output end of the LM258 operational amplifier U5A chip and the parallel connection port of the resistor R1;
a pin 8 of the LM258 operational amplifier U5A chip, a pin 8 of the LM258 operational amplifier U5B chip, a pin 3 of the LM3914 linear LED level driving chip, and an LED2-LED21 are connected to VCC in parallel;
a pin 4 of the LM258 operational amplifier U5A chip, a pin 4 of the LM258 operational amplifier U5B chip, a capacitor C13, a capacitor C6 and a resistor R9 are grounded in parallel;
the other end of the resistor R1, the other end of the capacitor C13 and the other end of the resistor R9 are connected to the positive electrode end of the LM258 operational amplifier U5B chip, and the negative electrode of the LM258 operational amplifier U5B chip and the output end of the LM258 operational amplifier U5B chip are connected to the end angle 5 of the LM3914 linear LED level driving chip U3 and the LM3914 linear LED level driving chip U4 in parallel;
the end angles 6 and 7 of the LM3914 linear LED level driving chip U3 are connected with one end of a resistor R11 in parallel, the other end of the resistor R11 is connected with the end angle 8 of the LM3914 linear LED level driving chip U3, a parallel connection port of a capacitor C4 and a resistor R10 in parallel, the other end of the resistor R10 is connected with the end angle 2 of the LM3914 linear LED level driving chip U3 in parallel and is grounded, and the end angle 4 of the LM3914 linear LED level driving chip U3 is connected with the end angle 6 of the LM3914 linear LED level driving chip U4;
the terminal angle 7 series resistor R12 of the LM3914 linear LED level driving chip U4 is grounded in parallel with the terminal angles 2, 4 and 8 of the LM3914 linear LED level driving chip U4, and pins 1 and 10-18 of the LM3914 linear LED level driving chip U3 and the LM3914 linear LED level driving chip U4 are connected with the LEDs 2-LED21 respectively.
3. The LED abrasion gauge for the HPB bearing indication used for the shielding pump as claimed in claim 1, wherein the LED module is composed of an LED 2-an LED21, the LED 2-the LED21 are controlled by two LM3914 linear LED level driving chips, the LED module is changed into 20 sections of level driving circuits for LED display after conversion and combination, and the LED1 series resistor R13 is connected with VCC to form a power indicator.
4. The LED HPB bearing wear indicator for the canned motor pump of claim 1, wherein the MT3608 current mode boost converter U1 turns on the MOSFET by control, and generates an oscillating boost voltage by applying a 1-pin PWM square wave to the inductor L1, and outputs a constant 12V dc voltage through the diode D2, the resistor R2 and the resistor R3 are output voltage sampling resistors, and the output voltage formula is: o =0.6V (1+ R2/R3)
0.6V is a reference voltage provided inside the chip, a 12V direct-current voltage source is output in two paths, one path supplies power to the LM3914 linear LED level driving chips U3 and U4, and the other path outputs a reference 10V direct-current voltage serving as a reference voltage source of the U5 comparator after being stabilized by the voltage from R1 to U2(TL 431).
5. The LED indicating HPB bearing wear gauge for the canned motor pump as claimed in claim 2, wherein the LM258 operational amplifier U5A chip outputs 0-10V voltage, which is divided into 0-1.25V by resistors R7 and R8 and input to the anode of the LM258 operational amplifier U5B chip, and the output 0-1.25V voltage of the LM258 operational amplifier U5B chip is input to pins 5 of the LM3914 linear LED level driving chips U3 and U4, respectively; when the voltage of the 5 pins of the LM3914 linear LED level driving chips U3 and U4 is 0 to 1.25V input, the 1,10 to 18 pins of the LM3914 linear LED level driving chips U3 and U4 output according to the voltage of the 5 pin input, and drive the LEDs 2 to LED21 to emit light.
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| CN202111474740.5A CN114120896B (en) | 2021-12-03 | 2021-12-03 | LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump |
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| CN202111474740.5A CN114120896B (en) | 2021-12-03 | 2021-12-03 | LED indicates HPB bearing wearing and tearing gauge outfit for canned motor pump |
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| US7672591B2 (en) * | 2005-03-01 | 2010-03-02 | Soto Alexander I | System and method for a subscriber-powered network element |
| CN104809971A (en) * | 2014-11-13 | 2015-07-29 | 佛山市众盈电子有限公司 | Information display device of off-network solar power supply system |
| CN107197569A (en) * | 2017-07-25 | 2017-09-22 | 合肥惠科金扬科技有限公司 | A kind of LED backlight Drive Protecting Circuit and display device |
| CN207692103U (en) * | 2018-01-19 | 2018-08-03 | 厦门海莱照明有限公司 | A kind of driving circuit for G4 LED light |
| CN207732643U (en) * | 2018-01-26 | 2018-08-14 | 西安科技大学 | Boost DC switching power supply |
| CN208623552U (en) * | 2018-08-03 | 2019-03-19 | 东莞依沃特电子有限公司 | A kind of DC-DC booster circuit |
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