CN215378566U - Atmospheric electric field instrument with electricity storage battery - Google Patents
Atmospheric electric field instrument with electricity storage battery Download PDFInfo
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- CN215378566U CN215378566U CN202122069476.9U CN202122069476U CN215378566U CN 215378566 U CN215378566 U CN 215378566U CN 202122069476 U CN202122069476 U CN 202122069476U CN 215378566 U CN215378566 U CN 215378566U
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Abstract
The utility model relates to an atmospheric electric field instrument with an electricity storage battery, which comprises an atmospheric electric field instrument body, wherein a power supply circuit for supplying electricity to the atmospheric electric field instrument body is arranged in the atmospheric electric field instrument body, the power supply circuit comprises a power supply module, one end of the power supply module is electrically connected with a commercial power input interface and a power generation equipment input interface, the power supply module is used for supplying external electric energy to the atmospheric electric field instrument body, the power supply circuit also comprises an electricity storage module, the electricity storage module is electrically connected with the power supply module, the electricity storage module comprises a direct power supply unit for transmitting the electric energy from the power supply module to the atmospheric electric field instrument body and an electricity storage unit for storing the electric energy from the power supply module, the output ends of the direct power supply unit and the electricity storage unit are electrically connected with the atmospheric electric field instrument body, the electricity storage unit is used for charging when the power supply module normally supplies electricity and supplying electricity to the atmospheric electric field instrument body temporarily when the power supply module is powered off, the utility model has the effect of stably supplying power for the atmospheric electric field instrument.
Description
Technical Field
The utility model relates to the technical field of lightning early warning equipment, in particular to an atmospheric electric field instrument with an electricity storage battery.
Background
Under the action of the charge of the thunderstorm cloud, an electric field with certain strength is generated in the space and on the ground. When this electric field increases to a certain value, intense lightning occurs. In recent decades, with the development of socio-economic, the threat of lightning strikes to high-tech fields such as electric power, communication information systems and aerospace is becoming more and more serious due to the massive adoption of high-tech equipment and microelectronic devices.
The atmosphere electric field instrument is used for measuring the atmosphere electric field and the change thereof, and measures the electric field by utilizing the principle that a conductor generates induced charges in the electric field. When the electric charge in the cloud is separated, the ground electric field is correspondingly changed, and the intensity of the ground electric field is related to the accumulation amount and distribution of the electric charge in the cloud, so that the change of the high-altitude cloud layer electric field can be reversed by measuring the change of the ground atmospheric electric field, and certain early warning is given to the risk of lightning stroke.
However, in the related art, because the atmospheric electric field instrument is generally connected to the commercial power, when lightning activity occurs, in order to reduce the influence and damage of the municipal power supply equipment caused by the lightning activity, after the electric field instrument detects the lightning activity and makes an early warning, whether the commercial power needs to be turned off is judged according to the electric field intensity, and when the commercial power stops supplying power, the electric field instrument cannot continue to work due to power failure; in addition, the atmospheric electric field instrument is often required to work outdoors, and a stable power supply means is lacked.
SUMMERY OF THE UTILITY MODEL
The utility model provides an atmospheric electric field instrument with an electricity storage battery, aiming at improving the phenomenon that the existing atmospheric electric field instrument lacks a stable power supply means and cannot continuously work after power failure.
The utility model provides an atmospheric electric field instrument with an electricity storage battery, which adopts the following technical scheme:
an atmospheric electric field instrument with an electricity storage battery comprises an atmospheric electric field instrument body, wherein a power circuit used for supplying electricity to the atmospheric electric field instrument body is arranged in the atmospheric electric field instrument body, the power circuit comprises a power supply module, one end of the power supply module is electrically connected with a mains supply input interface and a power generation equipment input interface, and the power supply module is used for supplying external input electric energy to the atmospheric electric field instrument body; the power supply circuit further comprises an electric storage module, the electric storage module is electrically connected with the power supply module, the electric storage module comprises a direct power supply unit and an electric storage unit, the direct power supply unit is used for transmitting electric energy from the power supply module to the atmosphere electric field instrument body, the electric storage unit is used for storing the electric energy from the power supply module, output ends of the direct power supply unit and the electric storage unit are electrically connected with the atmosphere electric field instrument body, and the electric storage unit is used for charging when the power supply module supplies power normally and supplying power temporarily to the atmosphere electric field instrument body when the power supply module is powered off.
Through adopting above-mentioned technical scheme, the alternating current of commercial power and power generation facility input converts the direct current of voltage stabilization into through power module, and the stable direct current of power module output can charge for the electric power storage unit, and the electric energy of the output of electric power storage unit and power module's output all can be for the power supply of atmosphere electric field appearance body, and normal work after the circular telegram of atmosphere electric field appearance body, when atmosphere electric field changes in order to reach the condition that triggers atmosphere electric field appearance, atmosphere electric field appearance sends thunder and lightning early warning. After the commercial power is disconnected and normally supplied, the power supply module has various input modes of commercial power input and power generation equipment input, so that the power can be stably supplied to the power generation equipment when the commercial power cannot be connected, and the power storage module can provide temporary power supply for the atmosphere electric field instrument when the commercial power and the power generation equipment are suddenly powered off, so that a stable power supply means is provided for the atmosphere electric field instrument.
Preferably, the power supply module includes a transformer and a rectifying and voltage-stabilizing unit, the transformer is used for reducing voltage of the commercial power, a primary coil of the transformer is electrically connected to the commercial power input interface and the power generation equipment input interface, a secondary coil of the transformer is electrically connected to the rectifying and voltage-stabilizing unit, and the rectifying and voltage-stabilizing unit is electrically connected to the power storage module.
By adopting the technical scheme, the transformer can convert high-voltage alternating current input by commercial power and power generation equipment into low-voltage electricity suitable for the atmospheric electric field instrument, so that the atmospheric electric field instrument can stably work under stable voltage.
Preferably, the power supply module includes a rectifying and voltage-stabilizing unit, the rectifying and voltage-stabilizing unit includes a rectifying bridge, an input end of the rectifying bridge is electrically connected to the secondary coil of the transformer, the rectifying bridge is configured to convert a voltage of the secondary coil of the transformer from an alternating current to a direct current, the rectifying and voltage-stabilizing unit further includes a voltage-stabilizing portion electrically connected to an output end of the rectifying bridge, and the voltage-stabilizing portion is configured to deliver a voltage of the direct current output by the rectifying bridge to the power storage module in a voltage-stabilizing manner.
By adopting the technical scheme, the rectification voltage stabilization unit can convert the low-voltage alternating current output by the transformer into the voltage stabilization direct current suitable for the atmospheric electric field instrument, and the stable voltage ensures the working stability of the atmospheric electric field instrument.
Preferably, an LED lamp for detecting whether the power supply module is energized is provided between the voltage regulator and the power storage module.
By adopting the technical scheme, the observation that the LED lamp is lighted indicates that the power supply module supplies power normally, the LED lamp is not lighted to represent that the power supply module is possibly electrified, and whether the external power supply supplies power normally can be judged by observing the LED lamp.
Preferably, the power circuit is electrically connected with an early warning module, the early warning module is electrically connected with the power supply module and the storage battery, the early warning module is further electrically connected with the atmosphere electric field instrument body, the early warning module is driven by electric energy of the power circuit and is used for receiving an electric signal from the atmosphere electric field instrument body, and the early warning module responds to the electric signal from the atmosphere electric field instrument body and gives an alarm.
Through adopting above-mentioned technical scheme, power module and battery are the power supply of early warning module, and when atmospheric electric field appearance body received thunder and lightning signal, the thunder and lightning early warning of department is sent out to accessible alarm module.
Preferably, the early warning module includes a signal receiving unit, a reference voltage unit, a comparator and an early warning unit, an output end of the signal receiving unit is connected to a positive input electrode of the comparator, the signal receiving unit is used for receiving an electrical signal output by the atmospheric electric field instrument body and transmitting the electrical signal to the comparator, the reference voltage unit is electrically connected to a negative input electrode of the comparator, and an output end of the comparator is electrically connected to the early warning unit.
By adopting the technical scheme, when the signal receiving unit receives the lightning signals from the atmospheric electric field instrument, the voltage of the positive input electrode of the comparator is higher than the reference voltage of the negative input electrode, and the comparator outputs the electric signals at the moment, so that the early warning unit sends out lightning early warning.
Preferably, the signal receiving unit includes a transistor Q1, a base of the transistor Q1 is electrically connected to the atmospheric electric field instrument body, a collector of the transistor Q1 is electrically connected to the rectifying and voltage-stabilizing unit and the battery, an emitter of the transistor Q1 is electrically connected to the positive input of the comparator, and when the base of the transistor Q1 receives an electrical signal from the atmospheric electric field instrument body, the transistor Q1 is turned on.
Through adopting above-mentioned technical scheme, when atmosphere electric field appearance body output signal, triode Q1 switches on, makes the comparator output signal of telecommunication to the drive early warning unit sends the thunder and lightning early warning.
Preferably, the early warning unit comprises an early warning part and a triggering part electrically connected with the output end of the comparator, and the triggering part is used for receiving a comparison signal from the comparator and driving the early warning part to give out a light-on alarm.
Through adopting above-mentioned technical scheme, trigger portion receives after the comparative signal that comes from the comparator stable early warning portion that transmits fast, makes early warning portion send the thunder and lightning early warning, and the early warning mode is stable high-efficient.
In summary, the utility model includes at least one of the following beneficial technical effects:
the power supply module has multiple input modes of mains supply input and power generation equipment input, can stably supply power through the power generation equipment when the mains supply cannot be connected, and can supply power for the atmospheric electric field instrument when the mains supply and the power generation equipment are suddenly powered off, so that a stable power supply means is provided for the atmospheric electric field instrument;
2. when the signal receiving unit receives the thunder and lightning signal from the atmospheric electric field instrument, the voltage of the positive input electrode of the comparator is higher than the reference voltage of the negative input electrode, and the comparator outputs an electric signal at the moment, so that the early warning unit sends out thunder and lightning early warning, and the thunder and lightning early warning is stable and quick.
Drawings
Fig. 1 is a circuit diagram in the present embodiment.
Description of reference numerals: 1. a power supply circuit; 11. a power supply module; 111. a rectifying and voltage stabilizing unit; 12. an electric storage module; 121. a direct power supply unit; 122. an electric storage unit; 2. an early warning module; 21. a signal receiving unit; 22. a reference voltage unit; 23. and an early warning unit.
Detailed Description
The present invention is described in further detail below with reference to fig. 1.
The utility model relates to an atmospheric electric field instrument with an electricity storage battery, which comprises an atmospheric electric field instrument body, wherein a power circuit 1 for supplying power to the atmospheric electric field instrument body and an early warning module 2 electrically connected with the power circuit 1 are arranged in the atmospheric electric field instrument body, and the early warning module 2 is used for receiving an electric signal from the atmospheric electric field instrument body and responding to the electric signal so as to send out an alarm.
Specifically, the power supply circuit 1 includes a power supply module 11. Wherein, the input electricity of power module 11 is connected with commercial power and inserts the mouth with the power generating equipment inserts the mouth. In this embodiment, the power generation device inlet may be a generator inlet, a solar power generation device inlet, or a wind power generation inlet. In other embodiments, the power plant access may also be a bio-power access, a hydro-power access.
Specifically, the power supply module 11 includes a transformer, a primary coil of the transformer is electrically connected to the commercial power input interface and the power generation equipment input interface, the transformer is used for reducing voltage of the commercial power, and the transformer is used for conducting electric energy brought by the commercial power or the power generation equipment and reducing voltage of the connected electric energy, so as to supply power to the atmospheric electric field instrument body.
Referring to fig. 1, the power supply module 11 further includes a rectifying and voltage-stabilizing unit 111 for rectifying and stabilizing the electric energy output by the transformer, and meanwhile, the rectifying and voltage-stabilizing unit 111 is configured to convert the voltage accessed by the mains supply input interface or the power generation equipment input interface from ac to stable dc.
Specifically, the rectifying and voltage-stabilizing unit 111 includes a rectifying bridge for converting the ac power output by the transformer into dc power, and the rectifying bridge is electrically connected to the secondary winding of the transformer.
The rectifying and voltage-stabilizing unit 111 further includes a voltage-stabilizing portion for stabilizing the dc power output by the rectifier bridge, and the voltage-stabilizing portion is electrically connected to the output end of the rectifier bridge.
Specifically, the voltage stabilizing part comprises an adjustable integrated voltage stabilizing chip, the type of the adjustable integrated voltage stabilizing chip is LM338, a pin II (Vin pin) of the adjustable integrated voltage stabilizing chip is electrically connected with the output end of the rectifier bridge unit, a pin I (ADJ pin) of the adjustable integrated voltage stabilizing chip is electrically connected with a slide rheostat RP, and the output voltage of a pin III (Vout pin) of the adjustable integrated voltage stabilizing chip can be adjusted by adjusting the resistance value of the slide rheostat RP.
Referring to fig. 1, the power circuit 1 further includes a power storage module 12, the power storage module 12 is electrically connected to the output terminal of the adjustable integrated regulator chip, the power storage module 12 includes a direct power supply unit 121 for transmitting the power of the power supply module 11, the direct power supply unit 121 includes a diode D8, the input terminal of the diode D8 is electrically connected to the direct power supply unit 121 and is electrically connected to pin three (Vout pin) of the adjustable integrated regulator chip, the output terminal of the diode D8 is electrically connected to an LED light LED1, and the LED light LED1 is used for detecting whether the power supply module 11 is supplying power. When the power supply module 11 is supplying power normally, the LED1 lights to indicate that the power supply module 11 is supplying power.
Referring to fig. 1, the power storage module 12 further includes a power storage unit 122, the power storage unit 122 includes a diode D7, an input terminal of the diode D7 is electrically connected to a pin three (Vout pin) of the adjustable integrated voltage regulator chip, the diode D7 is used for unidirectional transmission of the electric power of the power supply module 11, the power storage unit 122 further includes a battery charging chip, the type of the constant current and constant voltage chip is a constant current and constant voltage chip, and a pin four (VCC pin) of the constant current and constant voltage chip is electrically connected to an output terminal of the diode D7, so that the current of the pin three (Vout pin) of the adjustable integrated voltage regulator chip can flow to the pin four (VCC pin) of the constant current and constant voltage chip through the diode D7 to energize the constant current and constant voltage chip. In addition, the power storage unit 122 further includes a storage battery, an electrical positive electrode of the storage battery is connected to the pin three (BAT pin) of the constant current and constant voltage chip, the positive electrode of the storage battery is further connected to the input end of the diode D9, the input end of the diode D9 is electrically connected to the output end of the diode D8, due to the unidirectional conductivity of the diode, the current in the direct power supply unit 121 cannot flow to the positive electrode of the storage battery through the diode D9, the power supply in the storage battery cannot flow to the direct power supply unit 121 through the diode D8, and the interference between the power supplies of the direct power supply unit 121 and the storage battery is reduced.
The output end of the diode D7 is further connected with an LED lamp LED2, and the anode of the LED lamp LED2 is connected to a pin one (CHRG pin) of the constant-current and constant-voltage chip. When the commercial power or the power generation equipment inputs electric energy, the electric energy flows from the output end of the D7 to a first pin (CHRG pin) of the constant-current constant-voltage chip through the LED lamp LED2, at the moment, the chip obtains an external power supply access signal, when the power supply module 11 is powered on and the electric quantity of the storage battery is not full, the storage battery can be charged through a third pin (BAT pin) of the constant-current constant-voltage chip, the first pin (CHRG pin) of the constant-current constant-voltage chip is powered on, and the LED lamp LED2 is lighted to prompt that the storage battery is being charged; when the power supply module 11 is powered off and the storage battery has residual electric energy, the anode of the storage battery can output electric energy, and the anode of the storage battery is electrically connected to the input end of the diode D9.
Referring to fig. 1, the power circuit 1 further includes an early warning module 2, the early warning module 2 includes a signal receiving unit 21, the signal receiving unit 21 includes an NPN-type triode Q1, a base of the triode Q1 is electrically connected to an output terminal of the atmospheric electric field instrument body, a collector of the triode Q1 is electrically connected to an output terminal of the rectifying and voltage stabilizing unit 111 and an output terminal of the battery, an input terminal of the atmospheric electric field instrument body is electrically connected to the output terminal of the rectifying and voltage stabilizing unit 111 and the output terminal of the battery, the triode Q1 is electrically connected to a comparator, a positive input terminal V + of the comparator U is electrically connected to an emitter of the triode Q1, a base of the triode Q1 is electrically connected to the output terminal of the rectifying and voltage stabilizing unit 111 and the output terminal of the battery, and the collector is electrically connected to the output terminal of the rectifying and voltage stabilizing unit 111 and the output terminal of the battery. When the base of the transistor Q1 receives the electrical signal from the atmospheric electric field meter body, the transistor Q1 is turned on to energize the positive input of the comparator.
The negative input pole V-of the comparator is electrically connected with a reference voltage unit 22, the reference voltage unit 22 is used for transmitting a reference voltage to the negative input pole of the comparator, and the comparator is used for outputting a comparison signal when receiving that the voltage of the atmospheric electric field instrument is greater than the reference voltage.
Referring to fig. 1, the early warning module 2 further includes an early warning unit 23, wherein the early warning unit 23 includes an NPN transistor Q2, a base of the transistor Q2 is electrically connected to an output terminal of the comparator, and a collector of the transistor Q2 is electrically connected to the relay KM 2. In this embodiment, the input terminal of the relay KM2 is electrically connected to the output terminal of the rectifying and voltage-stabilizing unit 111 and the positive electrode of the storage battery, and the output terminal of the relay KM2 is electrically connected to the collector of the transistor Q2. The emitter of the triode Q2 is electrically grounded, when the base of the triode Q2 receives a comparison signal from the comparator, the triode Q2 is conducted, and after the relay KM2 is electrified, the switch KM2-1 controlled by the relay KM2 is controlled to be closed.
One end of a normally open contact switch KM2-1 controlled by a relay KM2 is electrically connected to the output end of the rectifying and voltage-stabilizing unit 111 and the anode of the storage battery, the other end of the normally open contact switch KM2-1 is electrically connected to the base of an NPN type triode Q3, the collector of the triode Q3 is electrically connected to an LED lamp LED4, the other end of the LED lamp LED4 is electrically connected to the output end of the rectifying and voltage-stabilizing unit 111 and the anode of the storage battery, and the emitter of the triode Q3 is grounded. When a normally open contact switch KM2-1 controlled by the relay KM2 is closed, the base electrode of the triode Q3 receives the output electric energy from the output end of the rectifying and voltage-stabilizing unit 111 or the storage battery, the triode Q3 is conducted, and at the moment, the LED4 is on, and lightning early warning is sent out.
The implementation principle of the utility model is as follows: alternating current input by commercial power and power generation equipment is converted into direct current through the comparator, the alternating current is converted into direct current with stable voltage through the adjustable integrated voltage stabilizing chip, the direct current flowing out of the output end of the adjustable integrated voltage stabilizing chip can charge the storage battery when flowing through the constant current constant voltage chip, electric energy output by the output end of the storage battery and the output end of the adjustable integrated voltage stabilizing chip can both supply power to the atmospheric electric field instrument and the early warning module 2, when the atmospheric electric field instrument receives a thunder and lightning signal, the triode Q1 is conducted when outputting the signal, so that the input voltage of a positive input electrode V + of the comparator is higher than the reference voltage input by a negative input electrode V-, so that the output end of the comparator outputs a comparison signal, the base electrode of the triode Q2 is conducted when receiving the signal output by the output end of the comparator, the relay KM2 is electrified, and the normally-open contact switch KM2-1 controlled by KM2 is closed, therefore, the base electrode of the triode Q3 receives the electric energy from the storage battery or the chip-adjustable integrated voltage-stabilizing chip, the triode Q3 is conducted, the LED lamp LED3 connected to the collector electrode of the triode Q3 is turned on, and the thunder early warning is sent out.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.
Claims (8)
1. The utility model provides a take electric storage battery's atmosphere electric field instrument, includes atmosphere electric field instrument body, its characterized in that, this internal power supply circuit (1) that is used for to being provided with of atmosphere electric field instrument body power supply, power supply circuit (1) includes:
the power supply device comprises a power supply module (11), wherein one end of the power supply module (11) is electrically connected with a mains supply input interface and a power generation equipment input interface, and the power supply module (11) is used for providing external input electric energy for the atmosphere electric field instrument body;
the electric power storage module (12) is electrically connected to the power supply module (11), the electric power storage module (12) comprises a direct power supply unit (121) used for transmitting electric energy from the power supply module (11) to the atmosphere electric field instrument body and an electric power storage unit (122) used for storing the electric energy from the power supply module (11), the output ends of the direct power supply unit (121) and the electric power storage unit (122) are electrically connected to the atmosphere electric field instrument body, and the electric power storage unit (122) is used for charging when the power supply module (11) supplies power normally and supplying power temporarily to the atmosphere electric field instrument body when the power supply module (11) is powered off.
2. An atmospheric electric field instrument with an electric storage battery as defined in claim 1, wherein: the power supply module (11) comprises a transformer and a rectification and voltage stabilization unit (111), wherein the transformer is used for reducing voltage of commercial power, a primary coil of the transformer is electrically connected with a commercial power input interface and a power generation equipment input interface, a secondary coil of the transformer is electrically connected with the rectification and voltage stabilization unit (111), and the rectification and voltage stabilization unit (111) is electrically connected with the power storage module (12).
3. An atmospheric electric field instrument with an electric storage battery as defined in claim 2, wherein: the rectifying and voltage stabilizing unit (111) comprises a rectifying bridge, the input end of the rectifying bridge is electrically connected to the secondary coil of the transformer, the rectifying bridge is used for converting the voltage of the secondary coil of the transformer from alternating current to direct current, the rectifying and voltage stabilizing unit (111) further comprises a voltage stabilizing part which is electrically connected to the output end of the rectifying bridge, and the voltage stabilizing part is used for stabilizing and transmitting the voltage of the direct current output by the rectifying bridge to the electric power storage module (12).
4. An atmospheric electric field instrument with an electric storage battery as defined in claim 3, wherein: and an LED lamp for detecting whether the power supply module (11) is electrified is arranged between the voltage stabilizing part and the electric storage module (12).
5. An atmospheric electric field instrument with an electric storage battery as defined in claim 4, wherein: the power supply circuit (1) is electrically connected with an early warning module (2), the early warning module (2) is electrically connected with the power supply module (11) and the storage battery, the early warning module (2) is also electrically connected with the atmosphere electric field instrument body, the early warning module (2) is driven by electric energy of the power supply circuit (1), the early warning module (2) is used for receiving an electric signal from the atmosphere electric field instrument body, and the early warning module (2) responds to the electric signal from the atmosphere electric field instrument body and gives an alarm.
6. An atmospheric electric field instrument with an electric storage battery as defined in claim 5, wherein: the early warning module (2) comprises a signal receiving unit (21), a reference voltage unit (22), a comparator and an early warning unit (23), wherein the output end of the signal receiving unit (21) is connected to the positive input electrode of the comparator, the signal receiving unit (21) is used for receiving an electric signal output by the atmosphere electric field instrument body and transmitting the electric signal to the comparator, the reference voltage unit (22) is electrically connected to the negative input electrode of the comparator, and the output end of the comparator is electrically connected to the early warning unit (23).
7. An atmospheric electric field instrument with an electric storage battery as defined in claim 6, wherein: the signal receiving unit (21) comprises a triode Q1, the base of the triode Q1 is electrically connected to the atmosphere electric field instrument body, the collector of the triode Q1 is electrically connected to the rectifying and voltage-stabilizing unit (111) and the storage battery, the emitter of the triode Q1 is electrically connected to the positive input electrode of the comparator, and the triode Q1 is conducted when the base of the triode Q1 receives an electric signal from the atmosphere electric field instrument body.
8. An atmospheric electric field instrument with an electric storage battery as defined in claim 7, wherein: the early warning unit (23) comprises an early warning part and a triggering part electrically connected with the output end of the comparator, and the triggering part is used for receiving a comparison signal from the comparator and driving the early warning part to give out a light-on alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122069476.9U CN215378566U (en) | 2021-08-30 | 2021-08-30 | Atmospheric electric field instrument with electricity storage battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122069476.9U CN215378566U (en) | 2021-08-30 | 2021-08-30 | Atmospheric electric field instrument with electricity storage battery |
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| CN215378566U true CN215378566U (en) | 2021-12-31 |
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| CN202122069476.9U Active CN215378566U (en) | 2021-08-30 | 2021-08-30 | Atmospheric electric field instrument with electricity storage battery |
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2021
- 2021-08-30 CN CN202122069476.9U patent/CN215378566U/en active Active
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