Intelligent current acquisition device
By combining the current acquisition module, processing module, and communication module of the intelligent current acquisition device, the problems of complex wiring and difficult fault diagnosis in current acquisition are solved, and simplified wiring and rapid fault diagnosis are achieved.
Patent Information
- Application Number
- CN202422911801.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing current acquisition methods require multiple current transformers and cable connections in low-voltage outgoing cabinets, resulting in complex wiring, increased workload, and difficulty in troubleshooting.
An intelligent current acquisition device is adopted, including a current acquisition module, a processing module, a wireless communication module, and a wired communication module. Data is transmitted to the current meter and the background monitoring device through wireless and wired networking, reducing physical wiring. A 32-bit SOC processor chip with high-precision ADC analog acquisition is used for data processing.
It simplifies the wiring process, reduces workload, and facilitates quick troubleshooting when problems occur.
Smart Images
Figure CN223611609U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electric power energy monitoring technical field, concretely is a kind of intelligent current acquisition device. BACKGROUND
[0002] The current acquisition mode of existing electric energy equipment is: the current in the electric energy equipment is collected through current transformer, the current transformer is connected with the current instrument of electric energy equipment through cable, and the collected current data is displayed on the current instrument. The defect of this acquisition mode is that when collecting current from low-voltage outlet cabinet, three current transformers are often used as one loop, and four lines are needed to connect the digital current instrument in the front cabinet door of each loop. With the increase of loop number, the number of current instrument lines will increase by four times, resulting in increased wiring. The wiring is often completed by manual, and manual wiring needs to pass a large amount of physical data wiring from the current transformer at the rear end of the cabinet to the digital current at the front end of the cabinet through the wiring channel in the cabinet, resulting in increased workload. At the same time, too much wiring makes it difficult to troubleshoot fault points when a fault occurs. SUMMARY
[0003] Therefore, the present application provides an intelligent current acquisition device to solve the problem of data transmission between current transformer and current instrument in the current acquisition of electric energy equipment, resulting in more wiring in electric energy equipment, increased workload and difficult troubleshooting. The specific scheme is as follows:
[0004] An intelligent current acquisition device is installed in the current transformer of high and low voltage switch cabinet respectively. The intelligent current acquisition device includes current acquisition module, processing module, wireless communication module, wired communication module and power supply.
[0005] The current acquisition module is in contact with the current transformer. The current acquisition module, wireless communication module, wired communication module and power supply are connected to the processing module.
[0006] Preferably, the wireless communication module includes several 2.4G wireless communication circuit modules.
[0007] The 2.4G wireless communication circuit modules are connected in star network structure.
[0008] Preferably, the wired communication module includes several 485 communication circuit modules.
[0009] The 485 communication circuit modules are connected in topological network structure.
[0010] Preferably, the intelligent current acquisition device is connected to the instrument of electric energy setting and the background monitoring device.
[0011] Preferably, the ADC analog acquisition 32-bit SOC processor chip circuit mainboard.
[0012] Preferably, the current acquisition module comprises a Hall current acquisition chip and a peripheral driving circuit.
[0013] The Hall current acquisition chip comprises a planar Hall element, a power supply, an operational amplifier and an output stage.
[0014] The planar Hall element is connected to the power supply, the operational amplifier and the peripheral driving circuit respectively.
[0015] The planar Hall element is isolated.
[0016] The operational amplifier is connected to the output stage.
[0017] The output stage is connected to the processing module.
[0018] Preferably, the intelligent current acquisition device is reserved with a voltage acquisition interface, which is arranged in the processing module.
[0019] The voltage acquisition interface is an SPI communication interface.
[0020] Compared with the prior art, the application has the following advantages:
[0021] The intelligent current acquisition device is installed on the high-low voltage switch cabinet current transformer as a whole, and the current acquisition module in the current acquisition device is used to acquire the data of the current transformer.
[0022] The current acquisition module sends the acquired data to the processing module, which is aggregated in the processing module. The processing module is transmitted to the current instrument of the electric energy equipment for display through the wired communication module, or transmitted to the background monitoring device for storage and display through the wireless communication module.
[0023] At the same time, the processing module in the application adopts the integrated high-precision ADC analog acquisition 32-bit SOC processor chip circuit mainboard to collect the current on the current transformer in the cabinet. The data is transmitted to the front-end display background of the cabinet through wireless or 485 double-foot shielded communication lines, which saves a large number of physical data lines and saves manual wiring. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1This application embodiment uses a multi-channel acquisition module based on 485 communication.
[0025] Figure 2 This application embodiment uses a multi-channel acquisition module based on 2.4G wireless communication.
[0026] Figure 3 This is a schematic diagram of the framework of the multi-channel intelligent acquisition device in the embodiments of this application;
[0027] Figure 4 This is a schematic diagram of a multi-channel intelligent current acquisition device in an embodiment of this application. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] like Figure 1 The present invention relates to an intelligent current acquisition device, which is installed on the current transformer of a high- and low-voltage switchgear. The intelligent current acquisition device includes: a current acquisition module, a processing module, a wireless communication module, a wired communication module, and a power supply.
[0030] The current acquisition module is in contact with the current transformer, and the current acquisition module, the wireless communication module, the wired communication module, and the power supply are respectively connected to the processing module.
[0031] Furthermore, the wireless communication module includes several 2.4G wireless communication circuit modules;
[0032] Several of the 2.4G wireless communication circuit modules are connected in a star network structure.
[0033] Furthermore, the wired communication module includes several 485 communication circuit modules;
[0034] Several of the aforementioned 485 communication circuit modules are connected using a topological network structure.
[0035] Furthermore, the intelligent current acquisition device is connected to the power meter and the background monitoring device respectively.
[0036] Furthermore, the 32-bit SOC processor chip circuit board for ADC analog acquisition.
[0037] It should be noted that:
[0038] In the application, the processing module is a 32-bit SOC processor chip circuit mainboard integrated with high-precision ADC analog acquisition, data collected by the current acquisition module is processed by high-precision ADC analog processing, and then uploaded to the corresponding display background of the wireless communication circuit module and the 485 communication circuit module through the 2.4G wireless communication circuit module and the 485 communication circuit module, using the communication network mode of wireless networking and wired networking, so as to provide a multi-channel intelligent current acquisition device, which is simple in wiring and easy to troubleshoot and solve problems.
[0039] Among them, the wireless communication module adopts a star network structure to connect several 2.4G wireless communication circuit modules, the 2.4G wireless communication circuit module transmits data to the display background using the network characteristics; the wired communication module adopts a topological network structure to connect several 485 communication circuit modules, the 485 communication circuit module transmits data to the display background using the network characteristics, realizing the transmission of monitored electric current through various communication modes and corresponding communication networks, and transmitting current data to the corresponding display background of the user end.
[0040] In the application, in order to increase the function of intelligent current acquisition, a voltage acquisition interface is reserved in the processing module: that is, the module can collect voltage signals to realize real-time acquisition of power, and through the real-time acquired power, the active power P, the reactive power Q, the apparent power and the power factor are calculated respectively through the collected voltage value U and current value I, thereby laying a foundation for realizing control of a group of low-voltage cabinets by a comprehensive control screen in the future.
[0041] Among them, the active power P = S \times cosφ;
[0042] The reactive power Q = UIsin&z;
[0043] The relationship between active power (P), reactive power (Q) and apparent power (S) can be represented by a power triangle. This relationship is similar to the Pythagorean theorem of a right triangle, where apparent power (S) is the hypotenuse, and active power (P) and reactive power (Q) are the two legs. The specific mathematical relationship is: [S^2 = P^2 + Q^2], which means that the square of the apparent power is equal to the square of the active power plus the square of the reactive power. In addition, active power can also be represented by apparent power multiplied by power factor (cosφ), that is, [P = S \times cosφ], the calculation formula of reactive power is [Q=UIsin&z], the calculation formula of active power is [P=UIcos&z], and the calculation formula of apparent power is [S=UI].
[0044] The patent will be described in detail below in combination with the drawings and specific embodiments.
[0045] Embodiment
[0046] As shown in Figure 4 , a multi-channel intelligent current acquisition device is provided, comprising a 2.4G wireless communication circuit module (i.e. wireless communication module), a 485 communication circuit module (i.e. wired communication module), a current acquisition module, a 32-bit SOC processor chip circuit mainboard integrated with high-precision ADC analog acquisition, and a power supply.
[0047] The current acquisition module mainly consists of a Hall current acquisition chip and its peripheral driving circuit.
[0048] The Hall current acquisition chip mainly consists of a planar Hall element, a power supply, an operational amplifier, and an output stage. The planar Hall element is made of CMOS technology and has isolation. It has small size, low power consumption, and high sensitivity. The operational amplifier has high input impedance, low noise, and high gain in order to amplify the Hall voltage signal. It can amplify the weak input voltage signal to an appropriate range. The operational amplifier is usually configured with a negative feedback amplification circuit to improve the linearity and stability of amplification. The output stage converts the amplified voltage signal into a readable voltage signal output, which is collected through the ADC channel of the 32-bit SOC processor chip circuit mainboard. The 32-bit SOC processor chip processes the collected data and converts the processed data into communication-recognized data for multi-communication transmission.
[0049] The 2.4G wireless communication circuit module star network structure transmits data for background display. The 2.4G wireless communication circuit module and the 32-bit SOC processor chip are wirelessly matched and communicated through the SPI data control bus, as shown in Figure 3 .
[0050] The 32-bit SOC processor chip transmits data to the 485 communication chip through a TTL level signal. The 485 communication chip transmits data to the background display under the support of the topology communication network and the modbus communication protocol, as shown in Figure 2 .
[0051] The specific implementation process is as follows:
[0052] In the dense area of electric energy information points, in order to reduce physical wiring, the electric energy equipment is first connected to the multi-channel intelligent current acquisition device. The on-site multiple different types of acquisition devices collect relevant parameter data and transmit various signal data to the center platform through 485 wired or 2.4 wireless communication methods to the background display. The background display receives corresponding data and stores and displays the data, realizing real-time dynamic monitoring of the user end.
[0053] The patent has been described above in conjunction with the drawings, but the patent is not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative. Those skilled in the art can make many forms under the inspiration of the patent without departing from the purpose of the patent and the scope protected by the claims, and these all belong to the protection scope of the patent.
Claims
1. A smart current acquisition device, the smart current acquisition device is installed in a current transformer of a high-low voltage switch cabinet, characterized in that, The intelligent current acquisition device comprises a current acquisition module, a processing module, a wireless communication module, a wired communication module and a power supply; The current acquisition module is in contact with the current transformer respectively, and the current acquisition module, the wireless communication module, the wired communication module and the power supply are connected with the processing module respectively.
2. The intelligent current collection device of claim 1, wherein, The wireless communication module comprises a plurality of 2.4G wireless communication circuit modules; The plurality of 2.4G wireless communication circuit modules are connected in a star network structure.
3. The intelligent current collection device of claim 1, wherein, The wired communication module comprises A plurality of 485 communication circuit modules; The plurality of 485 communication circuit modules are connected in a topology network structure.
4. The intelligent current collection device of claim 1, wherein, The intelligent current acquisition device is connected with the instrument of the electric energy setting and the background monitoring device respectively.
5. The intelligent current collection device of claim 1, wherein, An ADC analog acquisition 32-bit SOC processor chip circuit mainboard.
6. The intelligent current collection device of claim 1, wherein, The current acquisition module comprises a Hall current acquisition chip and a peripheral driving circuit; The Hall current acquisition chip comprises a planar Hall element, a power supply, an operational amplifier and an output stage; The planar Hall element is connected with the power supply, the operational amplifier and the peripheral driving circuit respectively, and the planar Hall element is isolated; The operational amplifier is connected with the output stage; The output stage is connected with the processing module. The intelligent current acquisition device 7. The intelligent current collection device of claim 1, wherein, A voltage acquisition interface is reserved in the intelligent current acquisition device, and the voltage acquisition interface is arranged in the processing module; The voltage acquisition interface is an SPI communication interface.