CN209858629U - Intelligent microsystem device for electric circuit current detection - Google Patents

Abstract

The utility model discloses an intelligent microsystem device for electric line current detection, including system level packaging, the system level packaging is inside to be provided with miniature magnetometer, miniature magnetometer one side is provided with little detection circuitry, little detection circuitry one side is provided with microcontroller, microcontroller one side is provided with radio frequency transceiver, the system level packaging is inside to be provided with power supply unit, the system level packaging outer end is provided with fixing device, need not to break off the circuit under test, only needs to adopt the fixed mode of external adhesion to realize the installation of equipment; the device has small volume, light weight, few components and simple structure, does not cause extra space and weight burden, and also saves the installation step of debugging the interconnection of the components; the installation precision is high, and the measurement accuracy is effectively improved compared with the traditional product; the whole product adopts a system-in-package technology, which is more beneficial to batch production and cost reduction.

Description

Intelligent microsystem device for electric circuit current detection

Technical Field

The utility model relates to a microsystem technical field, in particular to an intelligence microsystem device for electric line current detects.

Background

The production expansion and consumption upgrade bring unprecedented increase to the electricity consumption for production and living, and the following electrical safety accidents such as electrical fire, personal electric shock and the like also occur frequently. Among these accidents, line leakage or overcurrent is one of the most prominent causes. In an electric circuit, leakage current and overcurrent can be effectively prevented by detecting current. At present, most of products or specialities for detecting line current are systems composed of four parts, namely a residual current transformer, a temperature sensor probe, a monitoring detector and an internet of things communication module, and are powered by a centralized power taking device, as shown in fig. 3. When the device is used, a tested cable (generally a live wire and a zero line of a single-phase circuit or 3 phase lines and 1 zero line of a three-phase circuit) needs to be penetrated into a coil of a mutual inductor together to measure the residual current of the cable, meanwhile, a temperature sensor probe is placed near the tested electric circuit (generally a power distribution cabinet) to measure the local or ambient air temperature of the cable, then the residual current mutual inductor and the temperature sensor are connected to a monitoring detector through leads, the monitoring detector is connected to an internet of things communication module through a wired serial bus, the internet of things communication module is connected to a monitoring center based on a certain communication mode (such as GPRS) of a telecom operator to transmit monitoring data back, however, the device not only needs to disconnect the circuit when being installed and penetrate the tested cable into the mutual inductor coil to cause damage to the original circuit, and is not beneficial to old building transformation, and because the components are many and the integration level is low, the whole set of equipment occupies a large space and is inconvenient to install in a narrow space. In addition, the power consumption of the equipment is large, and the power needs to be taken in a centralized manner. Moreover, the detection precision is low, and the shielding protection capability is poor. These defects limit the applicability of the current detection device to the scene, and also greatly limit the number of devices installed and the degree of refinement of the detection.

Therefore, it is necessary to invent an intelligent microsystem device for electrical line current detection to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intelligence microsystem device for electric wire current detects to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an intelligence microsystem device for electric wire current detects, includes system level packaging, the inside miniature magnetometer that is provided with of system level packaging, miniature magnetometer one side is provided with little detection circuitry, little detection circuitry one side is provided with microcontroller, microcontroller one side is provided with the radio frequency transceiver, the inside power supply unit that is provided with of system level packaging, the system level packaging outer end is provided with fixing device.

Preferably, the fixing device includes an upper fixing device, a left lower fixing device, and a right lower fixing device, the upper fixing device is fixed on the upper side of the system-in-package, the left lower fixing device is arranged on the left lower side of the system-in-package, and the right lower fixing device is arranged on the right lower side of the system-in-package.

Preferably, the power supply unit is a separate small power supply unit, such as a button cell.

Preferably, the micro magnetometer, the micro detection circuit, the microcontroller and the radio frequency transceiver are all electrically connected with the power supply unit.

Preferably, the geometric centers of the upper side fixing device, the left lower side fixing device and the right lower side fixing device form an isosceles triangle.

Preferably, the micro-magnetometer has at least more than one sensitive axis.

The utility model discloses a technological effect and advantage:

the utility model is provided with a micro magnetometer, a micro detection circuit, a microcontroller, a radio frequency transceiver, a system level package, a power supply unit, an upper side fixing device, a left lower side fixing device and a right lower side fixing device, non-contact measurement is realized, a circuit to be measured is not required to be disconnected, and the installation of equipment can be realized only by adopting an externally attached fixing mode; the device has small volume, light weight, few components and simple structure, does not cause extra space and weight burden, and also saves the installation step of debugging the interconnection of the components; the installation precision is high, and the measurement accuracy is effectively improved compared with the traditional product; the power consumption of the equipment is greatly reduced, centralized electricity taking is not needed, and the equipment can work for a long time only by a button battery; the whole product adopts a system-in-package technology, which is more beneficial to batch production and cost reduction.

Drawings

Fig. 1 is a schematic block diagram of the structure of the present invention.

Fig. 2 is an appearance schematic diagram of the present invention.

Fig. 3 is a schematic diagram of the background art of the present invention.

In the figure: 1 micro magnetometer, 2 micro detection circuits, 3 micro controllers, 4 radio frequency transceivers, 5 system-in-package, 6 fixing devices, 7 power supply units, 61 upper fixing devices, 62 left lower fixing devices and 63 right lower fixing devices.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a little system's device of intelligence for electric wire current detects as shown in fig. 1-2, including system in package 5, its characterized in that: a micro magnetometer 1 is arranged in the system-in-package 5, a micro detection circuit 2 is arranged on one side of the micro magnetometer 1, a micro-controller 3 is arranged at one side of the micro-detection circuit 2, a radio frequency transceiver 4 is arranged at one side of the micro-controller 3, a power supply unit 7 is arranged in the system-in-package 5, a fixing device 6 is arranged at the outer end of the system-in-package 5, the micro-magnetometer 1 can sense the magnetic field intensity which is superposed on the micro-sensor by the tested cable and is proportional to the current without accessing the tested cable, the detection circuit is used for conditioning and collecting the original signal of the micro-magnetometer 1, the microcontroller 3 is used for analyzing the characteristics of leakage information, the radio-frequency transceiver 4 is used for wirelessly transmitting the detection information to the monitoring center, the above four parts are integrated into a chip-scale integrated package by the method of system-in-package 5. Outside the integrated package, a fixing device 6 is used for attaching the device to the surface of the tested cable, and a power supply unit 7 is used for supplying power to the whole microsystem. For a single cable line, the current flowing through the cable can be directly measured; for a loop formed by a plurality of cables, when the tested cable has no electric leakage, the overlapped magnetic field intensity generated by each cable in the sensitive direction of the micro magnetometer 1 is zero or constant, and the output of the micro system is also zero or constant at the moment; when the cable to be detected has electric leakage, the intensity of the overlapped magnetic field generated in the sensitive direction of the micro magnetometer 1 is not zero or constant, the output of the micro system is a time variable in a proportional relation with the size of the electric leakage current, and the microcontroller 3 can analyze the characteristics of the value through light-weight intelligent calculation, judge the electric leakage attribute, and wirelessly transmit all information to a monitoring center through the radio frequency transceiver 4 integrated in the package, so that the aim of remote attached current monitoring is fulfilled. The current may also be measured by a multi-axis magnetometer and its calculation.

Further, in the above technical solution, the fixing device 6 includes an upper fixing device 61, a lower left fixing device 62, and a lower right fixing device 63, where the upper fixing device 61 is fixedly disposed on the upper side of the system in package 5, the lower left fixing device 62 is disposed on the lower left side of the system in package 5, and the lower right fixing device 63 is disposed on the lower right side of the system in package 5;

further, in the above technical solution, the power supply unit is an independent small power supply unit, such as a button battery;

further, in the above technical solution, the micro magnetometer 1, the micro detection circuit 2, the microcontroller 3, and the radio frequency transceiver 4 are all electrically connected to the power supply unit 7;

further, in the above technical solution, geometric centers of the upper fixing device 61, the lower left fixing device 62 and the lower right fixing device 63 form an isosceles triangle, the upper fixing device 61, the lower left fixing device 62 and the lower right fixing device 63 are constraint structures with identical shapes, including but not limited to an arc shape or other geometric shapes, for attaching a cable, in a vertical cross section perpendicular to a cable direction, the geometric centers of the upper fixing device 61, the lower left fixing device 62 and the lower right fixing device 63 form an isosceles triangle, and a symmetry axis thereof passes through a center of the upper fixing device 61 and a center of the micro magnetometer 1. When three-phase current is detected, geometric centers of the upper fixing device 61, the lower left fixing device 62 and the lower right fixing device 6 are required to form a regular triangle, and the geometric centers are positioned on the micro magnetometer 1;

further, in the above technical solution, the micro magnetometer 11 has at least one sensitive axial direction.

This practical theory of operation:

referring to the attached drawings 1-2 of the specification, use the utility model discloses the time, fixing device 6 at the externally mounted of system level packaging 5 can intelligent microsystem device attach to on being surveyed the cable, and keep the sensitive axial of miniature magnetometer 1 and the superimposed magnetic field intensity direction of cable to accord with the detection requirement, wherein miniature magnetometer 1 has more than one sensitive axial at least, and be connected with little detection circuitry 2 through system level packaging 5's method in the encapsulation, will represent the voltage value analog quantity of being surveyed the electric current and pass to little detection circuitry 2, little detection circuitry 2 converts this voltage value analog quantity into voltage value digital quantity, and pass to microcontroller 3, microcontroller 3 is behind the voltage value digital quantity analysis, the information transfer that will need the external transmission is for radio frequency transceiver 4, radio frequency transceiver 4 passes out the transmission of electric leakage information through wireless mode. And the sensitive axial direction of the micro magnetometer 1 and the magnetic field intensity direction superposed by the cable are kept to accord with the detection requirement.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. An intelligent microsystem device for electrical line current detection, comprising a system in package (5), characterized in that: the system level packaging (5) is internally provided with a miniature magnetometer (1), the miniature magnetometer (1) one side is provided with a micro detection circuit (2), the micro detection circuit (2) one side is provided with a microcontroller (3), the microcontroller (3) one side is provided with a radio frequency transceiver (4), the system level packaging (5) is internally provided with a power supply unit (7), and the outer end of the system level packaging (5) is provided with a fixing device (6).

2. The intelligent microsystem device for electrical line current detection as claimed in claim 1, wherein: fixing device (6) include upside fixing device (61), left downside fixing device (62), right downside fixing device (63), fixed the setting in system in package (5) upside of upside fixing device (61), left side downside fixing device (62) sets up in system in package (5) left side downside, right side downside fixing device (63) sets up in system in package (5) right side downside.

3. The intelligent microsystem device for electrical line current detection as claimed in claim 1, wherein: the power supply unit (7) is an independent small power supply unit, such as a button cell.

4. The intelligent microsystem device for electrical line current detection as claimed in claim 1, wherein: the micro magnetometer (1), the micro detection circuit (2), the microcontroller (3) and the radio frequency transceiver (4) are all electrically connected with the power supply unit (7).

5. An intelligent microsystem device for electrical line current detection as claimed in claim 2, characterized in that: the geometric centers of the upper side fixing device (61), the left lower side fixing device (62) and the right lower side fixing device (63) form an isosceles triangle.

6. The intelligent microsystem device for electrical line current detection as claimed in claim 1, wherein: the micro magnetometer (1) has at least more than one sensitive axial direction.