TWI738605B - Wireless current detection device and system - Google Patents

Abstract

This disclosure is a wireless current detection device and system. The system is used with a repeater and a server. The wireless current detection device senses wires and generates an induced current signal. The current detection signal processing unit receives the induced current signal to generate current detection signal. The charging energy storage unit receives the induced current signal to generate an electric energy to supply power to the central control unit. The wireless communication module of the central control unit forms two-way signal transmission through the antenna unit. The device of the present invention is used in electrical equipment , and inductive energized wire is used for measurement, it obtains its own operating power. After the central control unit receives the current detection signal, it uses the repeater to return the device power signal of the power switch to the central control unit to calculate the power, the power value is returned to the server, in addition to obtaining correct and synchronized electrical power and improving measurement accuracy, the device of the present invention can also be calibrated.

Description

Wireless current detection device and system

The invention relates to a wireless current detection device and system, in particular to a wireless current detection device and system with a power phase angle detection function.

In the existing commercially available current transformer (CT), or current sensor, the magnetic induction coil part must be connected to the current sensor in a wired manner, which is more limited in use, and moreover, At present, current sensors must be connected to an additional power supply before they can be used. When there is no power available on site, it will be difficult to prepare for current detection. In addition, when the current sensor measured by wireless induction is used to measure electrical equipment using three-phase power, the AC power measurement must be measured with three sets of current sensors to measure the current value, and then the voltage Calculate together (the voltage may be obtained by manually measuring the electrical equipment with other equipment or the voltage data displayed by the electrical equipment) to measure the three-phase electrical power. The measurement and use not only take time in the preparation process, but also the measurement. The result of electric power is also time-consuming, and there are often problems that the measurement is out of sync, inaccurate, and not instant.

In view of this, according to an embodiment of the present invention, a wireless current detection device is provided, which is suitable for an energized wire of an electrical equipment. The wireless current detection device includes: a current magnetic induction unit, Inducing the wire to generate an induced current signal; a current detection signal processing unit electrically connected to the current magnetic induction unit, and the current detection signal processing unit receives the induced current signal to generate a current detection signal; The charging energy storage unit is electrically connected to the current magnetic induction unit, the charging energy storage unit receives the induced current signal to provide an electric energy; a central control unit receives the electric energy provided by the charging energy storage unit to Is in operation, and the central control unit is electrically connected to the current detection signal processing unit, the central control unit receives the current detection signal, and the central control unit has a wireless communication module; and An antenna unit is electrically connected to the wireless communication module, and the antenna unit forms two-way signal transmission.

In particular, the current detection signal processing unit includes an amplifier, an analog-to-digital converter and a digital signal processor, and the analog-to-digital converter is electrically connected to the amplifier and the digital signal processor, respectively.

Wherein, the central control unit is a microcontroller (MCU) or a processor (CPU). The wire is an equipment load wire.

According to another embodiment of the present invention, a wireless current detection system is provided, which has a wireless current detection device. The wireless current detection system includes: a repeater, which is communicatively connected with the antenna unit , The repeater receives the signal transmitted by the antenna unit, the repeater is connected to a power switch device, the repeater receives a device power signal of the power switch device, and the device power signal passes through the The repeater is in communication connection with the antenna unit and the wireless communication module, and transmits the equipment power signal to the central control unit of the wireless current detection device; wherein, by the The central control unit calculates the device power signal and the current detection signal to generate a power signal, transmits the power signal to the repeater via the wireless communication module and the antenna unit, and then The repeater transmits to a server for data processing.

In particular, the device power signal is a voltage and phase signal, and the current detection signal is a current and phase signal.

In particular, the current magnetic induction unit senses the current of a load wire of the electrical equipment.

In particular, the wire is a plurality of wires, and the electrical equipment is a plurality of electrical equipment, so that the power signal calculated and generated by each of the wireless current detection devices is synchronously transmitted.

In particular, the central control unit includes a timing module, which transmits the power signal at a fixed time by the timing of the timing module, or uses the timing of the timing module to make the current magnetic induction unit timing Inducing the wire to generate the induced current signal, or the repeater periodically communicates the device power signal with the antenna unit and the wireless communication module via the repeater, and connects the The equipment power signal is transmitted to the central control unit of the wireless current detection device.

Wherein, the repeater is a wireless access device (Access Point).

Therefore, the present invention can not only be directly connected to the energized wire to measure the current in the form of a hook meter, but also the present invention can obtain power by inducing current by itself without additional connection of the power cord. The present invention can detect the current (load) and know the phase at regular time, and calculate the voltage and phase signal of the power switch equipment returned by the repeater timing, and transmit it to the repeater and its server to know the result of the electric power. , The present invention can obtain (single-phase) electric power as long as a single group is used, and there is no need to connect other current detectors. The process of calculating the electric power does not require tedious manual calculations. The electric power can be obtained by automatic detection. The knowledge of this has become more timely and convenient.

In order to further understand the technology, methods and effects of the present invention to achieve the intended purpose, please refer to the following detailed descriptions and drawings about the present invention. I believe that the purpose, features and characteristics of the present invention can be thoroughly and concretely obtained from this. It is understood that, however, the accompanying drawings are only provided for reference and illustration, and are not intended to limit the present invention.

The following is a specific embodiment to illustrate the implementation of the "wireless current detection device and system" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those with ordinary knowledge and ordinary skills in the field, other drawings can be obtained based on these drawings without too much effort.

Among them, please refer to FIGS. 1 and 2. FIG. 1 is a block diagram showing a wireless current detection system according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a wireless current detection system according to an embodiment of the present invention. Detailed block diagram of the wireless current detection device used.

As shown in FIGS. 1 and 2, respectively, a wireless current detection system is provided, which has a wireless current detection device 11. The wireless current detection system includes, but is not limited to, a wireless current detection device 11, A repeater 13 and a server 14.

The wireless current detection device 11 includes, for example, but is not limited to: a current magnetic induction unit 110, a current detection signal processing unit 112, a charging energy storage unit 111, a central control unit 113, and an antenna unit 114. The current magnetic induction unit 110 can induce induced current. The principle of the current magnetic induction unit 110 should be understood by those skilled in the art. It is achieved by the magnetic induction of a coil or a conductor. I won't repeat them here. The current detection signal processing unit 112 is electrically connected to the current magnetic induction unit 110.

Preferably, the current detection signal processing unit 112 includes an amplifier 1121, an analog-to-digital converter (ADC) 1122, and a digital signal processor (DSP) 1123, and the analog-to-digital converter 1122 is electrically connected to each other. The amplifier 1121 and the digital signal processor 1123, wherein the amplifier 1121 can receive the induced current signal and amplify the signal, and then convert the signal type by the analog-to-digital converter 1122, and finally the digital signal The signal processor 1123 performs signal processing to generate a current detection signal. The amplifier 1121 can be a Programmable Gain Amplifier (PGA), but it is not limited thereto.

The charging energy storage unit 111 is electrically connected to the current magnetic induction unit 110, the charging energy storage unit 111 receives the induced current signal to generate and provide an electric energy, wherein the charging energy storage unit 111 may include a charging circuit and a capacitor thereof , The capacitor can be a super capacitor, by which the electric energy for the power supply is generated after storing the electric power, but it is not limited to this.

The central control unit 113 can be a microcontroller (MCU) or a processor (CPU), and is not limited to this, and receives the current detection signal and the electrical energy provided by the charging and energy storage unit, and The electric energy is used for the operation of the central control unit 113, and the central control unit 113 is electrically connected to the current detection signal processing unit 112.

Please continue to refer to FIG. 3. FIG. 3 is a schematic diagram showing a simulation of a wireless current detection system using a single set of wireless current detection devices according to an embodiment of the present invention. When the wireless current detection device 11 is externally used in a When a energized wire 100 of the electric device 21 is connected, the current magnetic induction unit 110 induces an induced current signal. The induced current signal can be a continuous sensing or a single signal. When the central control unit 113 borrows When the electric energy provided by the charging energy storage unit is operating, the central control unit 113 controls the current detection signal processing unit 112, so that the current detection signal processing unit 112 receives the induced current signal for signal processing or The current detection signal is converted to form the current detection signal. The central control unit 113 receives the current detection signal and stores current and phase information. The central control unit 113 includes a wireless communication module 1131. When the central control unit 113 includes a wireless communication module 1131, When the control unit 113 is a microcontroller (MCU) or a processor (CPU), the wireless communication module 1131 does not rule out whether it can be integrated or originally integrated in the microcontroller (MCU) or the processor (CPU), but Do not use this as a restriction.

The antenna unit 114 is electrically connected to the wireless communication module 1131, so that the antenna unit 114 forms two-way signal transmission, wherein the antenna unit 114 may include an antenna matcher (not shown) to adjust impedance matching and its output power .

Therefore, when the plug-in of the present invention is used to sense current on the wire 100, there is no need to connect an additional power cord. When the wireless current detection device 11 is plugged on the energized wire 100 for current detection, it can sense current by itself. The method of obtaining power to perform current detection work solves the common problem that current detectors must be connected to the power cord.

After the wireless current detection device 11 senses the current of the wire 100 and obtains current data, the repeater 13 can be communicatively connected with the antenna unit 114, and the repeater 13 can receive the antenna unit 114 The transmitted signal can be seen from FIG. 3, wherein when the wireless current detection system of the present invention is operating, the repeater 13 is connected to a power switch device 12, and the power switch device 12 provides information when the electrical device 21 is operating. Electricity is used, and the wire 100 is connected.

The connection between the repeater 13 and the power switch device 12 is a wired or wireless connection. The repeater 13 receives a device power signal of the power switch device 12, the device power signal is an AC power source, and the device power signal passes through the repeater 13 and the antenna unit 114 and its The wireless communication module 1131 is in communication connection, and transmits the device power signal to the central control unit 113 of the wireless current detection device 11.

Preferably, the central control unit 113 calculates the device power signal and the current detection signal to generate a power signal, wherein the device power signal is a voltage and phase signal, and the current detection signal is The calculation of current and phase signals can directly calculate the power value (including voltage, current and phase information). Furthermore, the power signal is transmitted to the repeater 13 via the wireless communication module 1131 and the antenna unit 114, and then transmitted to the server 14 by the repeater 13 for data processing.

It can be seen from FIG. 3 that, in this embodiment, a wireless current detection system formed by a single set of wireless current detection devices 11 can perform current detection of the wire 100 (especially a three-phase power line) and Calculate the power value. Wherein, the current magnetic induction unit 110 can further sense the current of a load wire of the electrical equipment 21, but it is not limited to this, as long as all lines on the electrical equipment 21 can be detected, for example, The current at the power supply end of the electric device 21, not just the current at the load end.

Preferably, in conjunction with FIG. 4, FIG. 4 is a schematic diagram showing a simulation of the wireless current detection system using multiple sets of wireless current detection devices according to an embodiment of the present invention. When the electrical equipment 21 is a plurality of electrical equipment 21, the wires 100 are connected to multiple wires 100, so that each of the wireless current detection devices 11 can calculate and generate the individual single-phase power The signal (for example, a three-phase power signal as a whole) is synchronously transmitted to the server 14. The transmission principle is known from the foregoing, and will not be repeated here. Therefore, by synchronously transmitting the result of the obtained power value to the server 14, the usage status of the multiple electric devices 21 can be quickly learned, and there will be no problems of out-of-sync detection or incorrect data.

Especially a feature of the present invention, wherein the central control unit 113 includes a timing module 1132, when the central control unit 113 is a microcontroller (MCU) or a processor (CPU), the timing module 1132 does not It excludes whether it can be integrated or originally integrated in a microcontroller (MCU) or a processor (CPU), and is not limited by this. When the central control unit 113 sets the timing of the timing module 1132, the power signal can be transmitted regularly, so that the current detection signal is calculated together with the device power signal returned by the repeater 13 , After the power signal is communicatively connected to the repeater 13 via the wireless communication module 1131 and the antenna unit 114, the power signal is periodically transmitted back to the repeater 13, and then transmitted At the server 14, automated detection is achieved.

When the present invention detects current, the timing module 1132 is set by the central control unit 113, so that the current magnetic induction unit 110 periodically senses the wire 100 to generate the induced current signal, and forms the current detection The signal is finally returned to the central control unit 113, which can also achieve automatic detection.

[Possible technical effects of the embodiment]

In summary, therefore, the present invention can not only be directly connected to the wire 100 to measure current in the form of a hook meter. When measuring current, the present invention does not need to connect an additional power cord, and can obtain power by itself by inducing current. Perform the operation of the wireless current detection device of the present invention. The present invention can detect the current (load) and know the phase at a fixed time, and calculate the voltage and phase signal of the power switch device 12 that the repeater 13 regularly returns. After the calculation, it is transmitted to the repeater 13 and its servo. The device 14 knows the relevant results of the electric power. The present invention can obtain (single-phase) electric power as long as a single group is used. There is no need to connect other current detectors, and the process of calculating the electric power does not require tedious manual labor. Calculations can eliminate manual calculations, and use automatic detection to make the knowledge of electric power more timely and convenient. In addition, when there are multiple electrical equipment 21, the present invention can also use the wireless current detection device to periodically detect and return current and phase information in the form of multiple units and multiple groups, and to use the repeater 13 The device power signal of the power switch device 12 is periodically returned and calculated together, and the calculated electrical power related results are synchronously returned to the server 14 to obtain correct and synchronized electrical power related information. Even with these correctly synchronized information, the subsequent wireless current detection device 11 can be calibrated to improve the accuracy of measuring electrical power.

Finally, it should be noted that in the foregoing description, although the concept of the technology of the present invention has been specifically shown and described in a number of exemplary embodiments, it will be understood by those with ordinary knowledge in the field of this technology. Various changes in form and details can be made under the condition that it deviates from the scope of the technical concept of the present invention defined by the scope of the following patent applications.

11: Wireless current detection device 110: Current magnetic induction unit 111: Charging energy storage unit 112: Current detection signal processing unit 1121: Amplifier 1122: Analog to Digital Converter 1123: Digital Signal Processor 113: Central Control Unit 1131: wireless communication module 1132: Timing Module 114: Antenna unit 12: Power switchgear 13: Repeater 14: server 21: Electric equipment 100: wire

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without too much effort, other drawings can be obtained based on these drawings. The drawings are only for convenience of description, and the number and form are not limited thereto. in:

FIG. 1 shows a block diagram of a wireless current detection system according to an embodiment of the present invention.

FIG. 2 shows a detailed block diagram of the wireless current detection device used in the wireless current detection system according to an embodiment of the present invention.

FIG. 3 shows a schematic diagram of a simulation of the wireless current detection system using a single set of wireless current detection devices according to an embodiment of the present invention.

FIG. 4 shows a simulation diagram of the wireless current detection system using multiple sets of wireless current detection devices according to an embodiment of the present invention.

11: Wireless current detection device

12: Power switchgear

13: Repeater

14: server

21: Electric equipment

Claims (10)

A wireless current detection device is suitable for an energized wire of an electrical equipment, and the wireless current detection device includes: A current magnetic induction unit, which induces the wire to generate an induced current signal; A current detection signal processing unit electrically connected to the current magnetic induction unit, the current detection signal processing unit receives the induced current signal to generate a current detection signal; A charging energy storage unit electrically connected to the current magnetic induction unit, and the charging energy storage unit receives the induced current signal to provide an electric energy; A central control unit receives the electric energy provided by the charging and energy storage unit for operation, and the central control unit is electrically connected to the current detection signal processing unit, and the central control unit receives the current detection For signal measurement, the central control unit has a wireless communication module; and An antenna unit is electrically connected to the wireless communication module, and the antenna unit forms two-way signal transmission. The wireless current detection device according to claim 1, wherein the current detection signal processing unit includes an amplifier, an analog-to-digital converter, and a digital signal processor, and the analog-to-digital converters are electrically connected to each other The amplifier and the digital signal processor. The wireless current detection device according to claim 1, wherein the central control unit is a microcontroller (MCU) or a processor (CPU). The wireless current detection device according to claim 1, wherein the wire is an equipment load wire. A wireless current detection system includes: A wireless current detection device with any one of claim items 1 to 4; and A repeater is communicatively connected with the antenna unit, the repeater receives the signal transmitted by the antenna unit, the repeater is connected to a power switch device, and the repeater receives the power switch device An equipment power signal of, the equipment power signal is communicatively connected with the antenna unit and the wireless communication module via the repeater, and the equipment power signal is transmitted to the wireless current detection device The central control unit; Wherein, the central control unit calculates the device power signal and the current detection signal to generate a power signal, and transmits the power signal to the wireless communication module and the antenna unit. The repeater is then transmitted by the repeater to a server for data processing. The wireless current detection system according to claim 5, wherein the device power signal is a voltage and phase signal, and the current detection signal is a current and phase signal. The wireless current detection system according to claim 5, wherein the repeater is a wireless access device (Access Point). The wireless current detection system according to claim 5, wherein the current magnetic induction unit senses the current of a load wire of the electric device. The wireless current detection system according to claim 5, wherein the wires are multiple wires, and the electrical equipment is multiple electrical devices, and each of the wireless current detection devices calculates all the Said power signal for synchronous transmission. The wireless current detection system according to claim 5, wherein the central control unit includes a timing module, and transmits the power signal at a fixed time based on the timing of the timing module, or uses the timing module The timing timing is such that the current magnetic induction unit periodically induces the wire to generate the induced current signal, or the repeater regularly transmits the device power signal through the repeater and the antenna unit and its The wireless communication module is in communication connection, and transmits the equipment power signal to the central control unit of the wireless current detection device.

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