CN210534223U

CN210534223U - Electrified indicating device of outdoor overhead line equipotential high-voltage line

Info

Publication number: CN210534223U
Application number: CN201920026644.6U
Authority: CN
Inventors: 熊正勇
Original assignee: Changzhou Pacific Automation Technology Co ltd
Current assignee: Changzhou Pacific Automation Technology Co ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2020-05-15
Anticipated expiration: 2029-01-08

Abstract

The utility model relates to an electrical safety monitoring technology field, more specifically relates to an electrified indicating device of outdoor overhead line equipotential high-voltage line to reach audio-visual suggestion and go out the purpose whether outdoor high-voltage line has the electricity, the electrified indicating device of outdoor overhead line equipotential high-voltage line, including power supply part and signal acquisition part. Solar cell panel passes through the charge management unit and charges for the inside lithium cell of device daytime, gather electric field energy simultaneously, electric field energy divide into two parts, partly for signal acquisition usefulness, another part is used for charging for the lithium cell, MCU gathers the voltage signal processing analysis of electric field energy, LED scintillation when having the electricity, LED is not bright when no electricity, this patent provides an electrified indicating device of outdoor overhead line equipotential high voltage line, it is strong to have the promptness, high stability, can real-time supervision high voltage overhead conductor whether electrified advantage.

Description

Electrified indicating device of outdoor overhead line equipotential high-voltage line

Technical Field

The utility model relates to an electrical safety monitoring technology field, more specifically relates to an electrified indicating device of outdoor overhead line equipotential high-voltage line based on solar energy auxiliary power supply technique.

Background

Present outdoor high-voltage overhead conductor has appeared "the invisible to electricity" difficult problem under the electrified state, can't judge whether the high-voltage line has the electricity through naked eye direct observation, for example: on the temporary overhead conductor of the construction site, on the overhead conductor crossed by the highway, on the overhead conductor crossed by the river, and on the overhead conductor easily causing the false touch of personnel on the overhead conductor, the electric shock accident and the damage accident of the conductor can be caused. At present only use professional equipment through professional electric power maintainer, if hand-held type circuit high voltage electricity testing equipment, judge whether overhead high-voltage line this moment is electrified, constructor can construction operation when electroless, but constructor does not know when can have the electricity, in case when the incoming telegram, still is under construction, will have very big potential safety hazard like this. Therefore, the utility model provides an electrified indicating device of outdoor overhead line equipotential high-voltage line can audio-visually indicate whether high-voltage line has the electricity.

Disclosure of Invention

The utility model discloses an overcome above-mentioned prior art at least a defect, provide an electrified indicating device of outdoor overhead line equipotential high-voltage line, have that the promptness is strong, stability is high, can real-time supervision high-pressure overhead conductor whether electrified advantage.

In order to solve the technical problem, the utility model discloses a technical scheme is: an outdoor overhead line equipotential high-voltage line electrification indicating device comprises a power supply part of the electrification indicating device and a signal acquisition part of the electrification indicating device. Solar cell panel passes through the charge management unit and charges for the inside lithium cell of device daytime, gathers electric field energy simultaneously, and electric field energy divide into two parts, and partly gives signal acquisition usefulness, and the part that is more than in addition is used for charging for the lithium cell, transfers battery voltage to the suitable operating voltage of MCU through DC-DC power modulation unit at last. The signal acquisition part is used for firstly acquiring the voltage of electric field energy, amplifying and conditioning the acquired signal, facilitating the acquisition of the micro-power consumption MCU, judging whether the electric field signal is acquired by the MCU, judging whether the high voltage is electrified if the electric field exists, and driving the LED to flicker by the MCU at the moment. The MCU collects signals of the voltage of the solar cell panel and the ambient light brightness sensor, and if the voltage of the solar cell panel is higher than a default threshold value and the ambient light brightness is high, the MCU improves the brightness of the LED display unit through PWM. Otherwise, the brightness of the LED is reduced under the condition of dark light or night.

In the technical scheme, the power supply part of the electrified indicating device comprises a high-voltage electric field, a lithium battery charging management unit, a lithium battery and a DC-DC power supply modulation conversion unit. The signal acquisition part comprises an energy collection and signal amplification conditioning unit, a micro-power consumption MCU, an ambient light brightness sensor, a PWM (pulse-width modulation) unit, an LED drive unit, an LED display unit and a watchdog reset unit. The units realize real-time monitoring whether the high-voltage overhead cable is electrified or not through the centralized processing of the MCU.

In one embodiment, the solar panel is divided into four pieces, and the four pieces are connected in series to supply power to the charging management unit.

Preferably, 4 solar panels are supported by the metal frame, every two solar panels are placed on two sides of the cable in parallel, and after the charged display device is installed on the cable, sunlight can completely irradiate the solar panels and is not shielded by the cable or other elements. The metal plate is provided with the water pouring groove, so that water accumulation on the solar panel is avoided when raining.

In one embodiment, the connecting wires of the solar panels use high-temperature-resistant and ageing-resistant power wires which are connected to the power management board.

In one embodiment, the solar panel is connected with the charging management unit, the charging management unit collects the voltage from the solar panel to charge the lithium battery, and the charging management unit can protect the lithium battery to prevent the battery from being overcharged, overcurrent and overdischarged.

In one embodiment, the MCU collects high voltage electric field signals and an ambient light brightness sensor to control LED flicker.

Preferably, the microprocessor adopts an STM8L ultra-low power consumption singlechip. The high-voltage line live indicating device adopts an equipotential design, and only needs to be connected with a high-voltage wire without a grounding loop.

Compared with the prior art, the utility model, have following characteristics:

1. the solar panel is used for assisting in power taking, power is supplied to the whole system, ultra-bright LED display, ultra-low power consumption MCU and large-capacity lithium battery are used, and the solar panel can continuously work for 15 days in rainy days after the solar panel is fully charged with electricity. And collecting high-voltage electric field energy, and using more energy for charging a system battery. The device monitors whether the aerial cable is electrified or not in real time, and solves the difficult problem of invisible electricity.

Drawings

Fig. 1 is an equivalent analog schematic diagram of high-voltage signal sampling in the embodiment of the present invention.

Fig. 2 is a block diagram of a hardware system according to an embodiment of the present invention.

Fig. 3 is a block diagram of an energy-obtaining and charging management unit according to an embodiment of the present invention.

Fig. 4 is the high-voltage electric field signal sampling schematic diagram in the embodiment of the present invention.

Fig. 5 is a schematic diagram of an external watchdog reset and MCU processing unit according to an embodiment of the present invention.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example 1:

as shown in figure 1, the sampling part of the high-voltage electric field signal is represented by using an equivalent simulation diagram, when the overhead line has high voltage, a certain electric field is always present near the conducting wire, and the electric field intensity at each position is not identical, so that a certain potential difference, namely a voltage difference, is always present at a certain point in the air near the conducting wire, and energy is present in the voltage difference, the MCU can collect the voltage difference signal to know whether the high voltage is electrified or not, the high-voltage wire and the copper foil on the circuit board are equivalent to form a capacitor, the high-voltage wire is used as one pole of the capacitor, the copper foil on the circuit board is used as the other pole of the capacitor, the air medium is regarded as a parallel connection of a large resistor and the capacitor, the copper foil is connected to the ground through the air medium, most of voltage is distributed between the air and the ground, two sides of the equivalent capacitor have smaller voltage, the MCU collects and, when the high-voltage line is electrified, the two sides of the equivalent capacitor have smaller voltages, and when the high-voltage line is not electrified, the two sides of the equivalent capacitor also have object voltages.

As shown in figure 2, the hardware of the whole system comprises a solar panel, a lithium battery, a signal sampling unit, a signal amplification conditioning unit, an MCU (microprogrammed control unit), an illumination brightness acquisition unit, an LED driving display unit, a solar panel signal, a lithium battery voltage signal and a high-voltage sampling signal, and the solar panel signal, the lithium battery voltage signal and the high-voltage sampling signal are processed and then sent to the MCU to analyze and judge whether the high voltage is electrified or not.

As shown in fig. 4, a high-voltage ac signal is rectified by a rectifier bridge, filtered by three capacitors C1, C2 and C3, connected to two resistors R10 through a bidirectional diode D3, divided by R13, filtered by R5 and C11 resistance-capacitance filtering to an ADC sampling unit, and before sampling by the ADC, a transient voltage suppressor is provided to prevent lightning from damaging the device, and excess electric field energy is sent to a charging management unit through a diode D1.

The microprocessor of the outdoor overhead line equipotential high-voltage line live indicating device adopts a micro-power consumption processor STM8L151 which is an embedded-microcontroller Integrated Circuit (IC) and is one of STM8L series developed by ST company.

As shown in figure 5, the outdoor overhead line equipotential high-voltage line live indicating device adopts an independent external watchdog reset chip U2 in the design, a watchdog is arranged on an MCU (U3), and the reliable operation of the system device is greatly ensured by the double watchdog.

In the embodiment, the microprocessor adopts the kernel STM8L151, so that the anti-interference characteristic (electromagnetic compatibility and dielectric strength) is enhanced, the power consumption is extremely low, the operation power consumption is about 180uA/MHz, and the microprocessor is provided with an internal crystal oscillator.

Example 2:

the present embodiment is similar to embodiment 1, except that in this embodiment, a system power supply of the outdoor overhead line equipotential high-voltage line live indicating device is mainly provided, and the device is powered by sunlight and electric field energy.

As shown in fig. 3, the energy of the device energy-taking unit mainly comes from solar energy and high-voltage electric field energy, generate electricity through solar cell panel, give lithium battery charging management unit and DC-DC power supply modulation unit, high-voltage electric field also can take out partly little energy and give charging management unit simultaneously, the power supply is mainly passed through solar panel and high-voltage electric field daytime, night or rainy day mainly give the device power supply through lithium cell and high-voltage electric field, every solar panel glues through 3M and fixes on metal support's tray, reuse metal buckle blocks all around, the parallel placing in both sides of every two solar panels, the latter half of metal support is through the epoxy casting in the device main part.

In this embodiment, get and send to the protection management unit that charges after can, the protection management unit that charges has the overvoltage protection function, guarantees through voltage protector that the lithium cell can not be overcharged by strong sunlight, also has the undervoltage protect function, if MCU monitors that lithium cell voltage is low and ambient light ratio is less strong, MCU can reduce LED's demonstration luminance and frequency to the life of device has been ensured.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An outdoor overhead line equipotential high-voltage line live indicating device is characterized in that the equipotential high-voltage live indicating device is mainly divided into a power supply part and a signal acquisition part, wherein the power supply part comprises a solar panel power supply and a high-voltage electric field power supply which are mutually independent, and when the sun exists in the daytime, the solar panel can continuously supply power to a lithium battery and an MCU system; the high-voltage electric field power supply part is used for collecting the energy of an electric field through the micro-power consumption acquisition unit as long as the circuit has high voltage and the electric field exists near the high voltage, and can also charge a battery and supply power to the MCU system; the signal acquisition part mainly comprises an electric field sampling and signal processing part.

2. The outdoor overhead line equipotential high-voltage line indicating device according to claim 1, wherein the power supply unit uses solar panel and high-voltage electric field energy as charging source, the lithium battery as main energy storage element, and the system is provided with a special lithium battery charging protection system to prevent the battery from being overcharged due to too strong solar light in summer.

3. The outdoor overhead line equipotential high-voltage line indicating device of claim 1, wherein four solar panels are connected in series, and each two solar panels are fixed by a metal piece and then distributed in parallel on both sides of the cable.

4. The apparatus for indicating live-state of equipotential high-voltage line according to claim 1, wherein said battery charging uses a DC/DC power modulation converting unit, comprising: overvoltage protection, voltage stabilization, voltage boosting and voltage reduction.

5. The outdoor overhead line equipotential high-voltage line live indicating device of claim 1, wherein the adopted MCU is STM8L151 ultra-low power consumption MCU.

6. The indicating device for indicating the electrification of the equipotential high-voltage line of the outdoor overhead line according to claim 1, wherein the signal acquisition part adopts a copper foil on a circuit board as a polar plate to be connected with the high-voltage conducting wire, the copper foil on the other circuit board is connected with the ground through air, a capacitor is formed between the two polar plates, and the MCU acquires the voltage between the capacitors and processes and analyzes the voltage through the operational amplification unit.

7. The outdoor overhead line equipotential high-voltage line indicating device of claim 1, wherein the MCU system collects the ambient light sensor and the solar panel output voltage to obtain the illumination intensity.

8. The outdoor overhead line equipotential high-voltage line indicating device according to claim 1, wherein the MCU system uses 5 red superbright entrance LEDs as a display unit for flashing display.

9. The outdoor overhead line equipotential high-voltage line live indicating device of claim 1, wherein the MCU system uses an internal watchdog in combination with an external independent watchdog to prevent the MCU from crashing.