CN216117786U - Fill electric pile strapping table based on magnetic tunnel resistance - Google Patents
Fill electric pile strapping table based on magnetic tunnel resistance Download PDFInfo
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- CN216117786U CN216117786U CN202122369338.2U CN202122369338U CN216117786U CN 216117786 U CN216117786 U CN 216117786U CN 202122369338 U CN202122369338 U CN 202122369338U CN 216117786 U CN216117786 U CN 216117786U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 230000004044 response Effects 0.000 abstract description 4
- 230000003993 interaction Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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Abstract
The utility model provides a charging pile meter based on a magnetic tunnel resistor, which comprises a magnetic tunnel resistor sensor, a Hall voltage sensor, a first operational amplifier, a second operational amplifier, an AD conversion circuit, a high-performance signal processing operation unit, a touch screen, a 485 communication module and a 4G communication module. The meter has the advantages of wide signal for acquiring direct current voltage and current, high response speed and high metering precision; meanwhile, a human-computer interaction interface based on a touch screen, and a 485 communication module and a 4G communication module are arranged, so that integrated management is facilitated.
Description
Technical Field
The utility model relates to the field of electrical parameter acquisition, in particular to a charging pile meter based on magnetic tunnel resistance.
Background
The electric energy metering is an important component of an electric energy charging system of an electric vehicle charging station, and the metering system comprises an electric energy meter, a collection interactive terminal and the like. Charging measurement of the charging pile is mainly a measuring instrument carried out when an electric vehicle user charges the charging pile in the charging station, and charging facilities can directly obtain the electric quantity charged by the electric vehicle by reading the electric energy data of the electric energy meter, so that the charging measurement is a basis for settlement of expenses between the charging station and the user.
Because the direct current of the charging pile changes greatly, the existing direct current meter has large error and poor stability when used on site, and therefore a new electric vehicle off-board charger electric energy meter is needed. Meanwhile, because the distribution range of the charging pile is wide, communication interfaces in different modes are needed for convenience of management.
SUMMERY OF THE UTILITY MODEL
The utility model provides a charging pile meter based on a magnetic tunnel resistor, which is wide in direct current voltage and current signal acquisition, high in response speed, high in metering precision and convenient for integrated management.
The technical scheme of the utility model is as follows: a charging pile meter based on magnetic tunnel resistance comprises a magnetic tunnel resistance sensor, a Hall voltage sensor, a first operational amplifier, a second operational amplifier, an AD conversion circuit, a high-performance signal processing operation unit, a touch screen, a 485 communication module and a 4G communication module,
the magnetic tunnel resistance sensor converts the primary current of the charging pile and then is connected to a first operational amplifier;
the Hall voltage sensor converts the direct-current voltage of the charging pile into a small signal and then accesses a second operational amplifier;
the first operational amplifier and the second operational amplifier are connected with the input end of the AD conversion circuit and are used for inputting the primary current of the charging pile and the direct-current voltage of the charging pile into the AD conversion circuit;
the output end of the AD conversion circuit is connected with the high-performance signal processing and operating unit, and the AD conversion circuit converts two paths of analog signals of direct-current voltage and direct-current circuit into digital signals and inputs the digital signals into the high-performance signal processing and operating unit;
the high-performance signal processing and operating unit is used for rapidly acquiring signals transmitted by the AD conversion circuit;
and the high-performance signal processing and operating unit is respectively connected with the touch screen, the 485 communication module and the 4G communication module.
The touch screen adopts a 7-inch color touch screen, and displays the voltage, current, power and electric energy values transmitted by the high-performance signal processing and computing unit.
485 communication module is used for the external interface, will respectively fill electric pile strapping table and carry out centralized management.
The 4G communication module is used for carrying out remote management and carrying out remote centralized management on the electric energy transformer through the cloud platform.
The magnetic tunnel resistance sensor converts the primary large current of the charging pile into a standard signal for metering in a piercing mode.
The utility model has the beneficial effects that: the meter has the advantages of wide signal for acquiring direct current voltage and current, high response speed and high metering precision; meanwhile, a human-computer interaction interface based on a touch screen, and a 485 communication module and a 4G communication module are arranged, so that integrated management is facilitated.
Drawings
Fig. 1 is a block diagram of the overall architecture of the present invention.
Fig. 2 is a tunneling magnetoresistive sensor of the present invention.
Fig. 3 is an operational amplifier circuit of the present invention.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the technical solution of the present invention: a charging pile meter based on magnetic tunnel resistance comprises a magnetic tunnel resistance sensor 1, a Hall voltage sensor 2, a first operational amplifier 3, a second operational amplifier 4, an AD conversion circuit 5, a high-performance signal processing operation unit 6, a touch screen 7, a 485 communication module 8 and a 4G communication module 9,
the magnetic tunnel resistance sensor 1 converts the primary current of the charging pile and then is connected to a first operational amplifier 3;
the Hall voltage sensor 2 converts the direct-current voltage of the charging pile into a small signal and then accesses the small signal to a second operational amplifier 4;
the first operational amplifier 3 and the second operational amplifier 4 are connected with the input end of the AD conversion circuit 5 and are used for inputting the primary current of the charging pile and the direct current voltage of the charging pile into the AD conversion circuit 5;
the output end of the AD conversion circuit 5 is connected with the high-performance signal processing and operating unit 6, and the AD conversion circuit 5 converts two paths of analog signals of direct-current voltage and direct-current circuit into digital signals and inputs the digital signals into the high-performance signal processing and operating unit 6;
the high-performance signal processing and operating unit 6 is used for rapidly acquiring signals transmitted by the AD conversion circuit 5;
and the high-performance signal processing and operating unit 6 is respectively connected with the touch screen 7, the 485 communication module 8 and the 4G communication module 9.
The touch screen 7 adopts a 7-inch color touch screen and displays the voltage, current, power and electric energy values transmitted by the high-performance signal processing and computing unit 6.
485 communication module 8 is used for external interface, will respectively fill electric pile strapping table and carry out centralized management.
The 4G communication module 9 is used for remote management, and remote centralized management is carried out on the electric energy transformer through a cloud platform.
As shown in fig. 2, the magnetic tunnel resistance sensor 1 converts a large primary current of the charging pile into a standard signal for measurement in a piercing manner.
As shown in fig. 3, the first operational amplifier 3 and the second operational amplifier 4 include a first resistor R1, an output terminal of the first resistor R1 is connected to a negative terminal of an operational amplifier OP27, an output terminal of the first resistor R1 is further connected to a positive terminal of a first diode V1 and a negative terminal of a second diode V2, respectively, a negative terminal of a first diode V1 is connected to a second resistor R2 and a third resistor R3, a first terminal of a second resistor R2 is connected to a negative terminal of the first diode V1, the other terminal is grounded, a third resistor R3 is connected to a negative terminal of the first diode V1, the other terminal is connected to a + Ucc terminal of the operational amplifier OP27, an positive terminal of the second diode V2 is connected to a fourth resistor R4 and a fifth resistor R5, a first terminal of the fourth resistor R4 is connected to a positive terminal of a second diode V2, the other terminal is grounded, a fifth resistor R5 is connected to a positive terminal of the second diode V2, and a positive terminal of the other terminal of the second resistor R6754-Ucc is connected to the second diode OP27, the positive terminal of the operational amplifier OP27 is connected to the output terminal.
The meter has the advantages of wide signal for acquiring direct current voltage and current, high response speed and high metering precision; meanwhile, a human-computer interaction interface based on a touch screen, and a 485 communication module and a 4G communication module are arranged, so that integrated management is facilitated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A charging pile meter based on a magnetic tunnel resistor is characterized by comprising a magnetic tunnel resistor sensor (1), a Hall voltage sensor (2), a first operational amplifier (3), a second operational amplifier (4), an AD conversion circuit (5), a high-performance signal processing operation unit (6), a touch screen (7), a 485 communication module (8) and a 4G communication module (9),
the magnetic tunnel resistance sensor (1) converts the primary current of the charging pile and then is connected to a first operational amplifier (3);
the Hall voltage sensor (2) converts the direct-current voltage of the charging pile into a small signal, and then the small signal is connected to a second operational amplifier (4);
the first operational amplifier (3) and the second operational amplifier (4) are connected with the input end of the AD conversion circuit (5) and are used for inputting the primary current of the charging pile and the direct-current voltage of the charging pile into the AD conversion circuit (5);
the output end of the AD conversion circuit (5) is connected with the high-performance signal processing and operating unit (6), the AD conversion circuit (5) converts two paths of analog signals of direct-current voltage and direct-current circuit into digital signals and inputs the digital signals into the high-performance signal processing and operating unit (6);
the high-performance signal processing and operating unit (6) is used for rapidly acquiring signals transmitted by the AD conversion circuit (5);
and the high-performance signal processing and operating unit (6) is respectively connected with the touch screen (7), the 485 communication module (8) and the 4G communication module (9).
2. The charging pile meter based on the magnetic tunnel resistance is characterized in that a 7-inch color touch screen is adopted as the touch screen (7) to display the voltage, current, power and electric energy values transmitted by the high-performance signal processing and operating unit (6).
3. The charging pile meter based on the magnetic tunnel resistor is characterized in that the 485 communication module (8) is used for an external interface to perform centralized management on the charging pile meters.
4. The charging pile meter based on the magnetic tunnel resistance is characterized in that the 4G communication module (9) is used for remote management, and the electric energy transformer is remotely and centrally managed through a cloud platform.
5. The charging pile meter based on the magnetic tunnel resistance is characterized in that the magnetic tunnel resistance sensor (1) converts a large primary current of the charging pile into a standard signal for metering in a piercing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369338.2U CN216117786U (en) | 2021-09-28 | 2021-09-28 | Fill electric pile strapping table based on magnetic tunnel resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369338.2U CN216117786U (en) | 2021-09-28 | 2021-09-28 | Fill electric pile strapping table based on magnetic tunnel resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216117786U true CN216117786U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122369338.2U Active CN216117786U (en) | 2021-09-28 | 2021-09-28 | Fill electric pile strapping table based on magnetic tunnel resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216117786U (en) |
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2021
- 2021-09-28 CN CN202122369338.2U patent/CN216117786U/en active Active
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