Load current monitoring device

Abstract

The utility model provides a load current monitoring device, comprising a circuit board and a state monitoring unit, the circuit board is provided with a current detection unit and a main control unit; the input end of the current detection unit is connected with load equipment and is used for detecting the current of the load equipment; the output end of the current detection unit is connected with the main control unit and is used for feeding back load current; the state monitoring unit is in wireless connection with the main control unit and is used for receiving the working state of the main control unit. According to the monitoring device, the current detection unit is arranged to receive the measured value of the main control unit to detect the current state, read the working current of the load in real time, and transmit information through the wireless transmission technology, so that manual observation is reduced, the safety is improved, the manpower is saved, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of current monitoring, in particular to a monitoring device for load current. Background Art

[0002] As people's requirements for quality of life and work efficiency continue to increase, the demand for safety, convenience and intelligence is also growing. This has driven the rapid innovation and progress of IoT smart device technology, especially in the field of real-time current monitoring. The combination of IoT and artificial intelligence enables devices to perceive the environment more intelligently and achieve automated control and data analysis.

[0003] However, the existing load current monitoring technology still faces some challenges and shortcomings. Although measures such as regular equipment inspection, proper use of electrical equipment and installation of protective devices can prevent and control the risk of equipment short circuits to a certain extent, there is still a lack of a more efficient, intelligent and real-time monitoring method to ensure that current anomalies can be immediately detected and measures can be taken.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In view of this, the utility model proposes a load current monitoring device, which can receive the measurement value of the main control unit to detect the current state by setting a current detection unit, read the load working current in real time, and transmit information through wireless transmission technology, thereby reducing human observation, improving safety, saving manpower and reducing costs.

[0006] The utility model proposes a load current monitoring device, comprising a circuit board and a state monitoring unit, wherein a current detection unit and a main control unit are arranged on the circuit board;

[0007] The input end of the current detection unit is connected to the load device to detect the current of the load device;

[0008] Specifically, the IN-terminal of the current detection unit is connected to the load device for supplying power to the load device and detecting the current of the load device;

[0009] The output end of the current detection unit is connected to the main control unit to feed back the load current; the state monitoring unit is wirelessly connected to the main control unit to receive the working state of the main control unit.

[0010] Furthermore, the current detection unit includes a current detection amplifier, an IN- pin on one side of the current detection amplifier is connected to the positive pole of the load device, and draws power through the IN+ pin of the resistor box current detection amplifier in the circuit, and a GND pin on the other side of the current detection amplifier is connected to the negative pole of the load device and grounded.

[0011] Furthermore, the current detection unit further includes a power management module, and the power management module is connected to the current detection amplifier to provide power;

[0012] The power management module includes a low differential voltage linear regulator, a first capacitor and a second capacitor;

[0013] The input interface of the low differential voltage linear regulator is connected to one end of the first capacitor and the N+ interface of the current detection amplifier, the output interface of the low differential voltage linear regulator is connected to one end of the second capacitor and the VS interface of the current detection amplifier, and the first capacitor and the second capacitor are grounded respectively.

[0014] Furthermore, the current detection unit further includes an overvoltage protection module, and the overvoltage protection module is connected to the current detection amplifier to protect the circuit;

[0015] The overvoltage protection module includes a fuse, a TVS tube and a third capacitor;

[0016] One end of the fuse is connected to the positive electrode of the external power supply, and the other end of the fuse is respectively connected to one end of the TVS tube, one end of the third capacitor and the resistor; the other end of the TVS tube is connected to the negative electrode of the external power supply and grounded, and the other end of the third capacitor is grounded.

[0017] Furthermore, the main control unit includes an MCU chip, and the MCU chip is connected to the output end of the current detection amplifier through an ADC converter of a GPIO.

[0018] Furthermore, the main control unit also includes a Bluetooth transmitter, the status monitoring unit is provided with a Bluetooth receiver, and the Bluetooth transmitter and the Bluetooth receiver are wirelessly connected via Bluetooth.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a load current monitoring device which can distinguish the working status of the load, provide real-time alarm when the load equipment is abnormal, and transmit information via Bluetooth, thereby reducing manual observation, improving safety, saving manpower, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1A schematic diagram of the overall structure of a load current monitoring device provided by an embodiment of the utility model;

[0022] Figure 2 This is a circuit diagram on a circuit board.

[0023] in:

[0024] 1- Circuit board; 2- Status monitoring unit;

[0025] 3-current detection unit; 4-main control unit;

[0026] 5- Load equipment. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to illustrate the utility model, and should not be regarded as limiting the scope of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] In order to more clearly explain the technical solution of the present invention, it is described in the form of specific embodiments below.

[0029] Example

[0030] See also Figure 1-2 As shown, a load current monitoring device of the utility model includes a circuit board 1 and a state monitoring unit 2, and a current detection unit 3 and a main control unit 4 are arranged on the circuit board 1; the current detection unit 3 is connected to the load device 5 to supply power to the load device 5 and detect the current of the load device 5; the output end of the current detection unit 3 is connected to the main control unit 4 to feed back the load current; the state monitoring unit 2 is wirelessly connected to the main control unit 4 to receive the working status of the main control unit 4.

[0031] See also Figure 2 As shown, the current detection unit 3 includes a current detection amplifier U1, the IN- pin on one side of the current detection amplifier U1 is connected to the positive electrode of the load device 5, and power is drawn to the IN+ pin on one side of the current detection amplifier through the resistor R1 in the circuit, and the pin on the other side of the current detection amplifier U1 is connected to the negative electrode of the load device 5 and grounded.

[0032] The current detection unit 3 also includes a power management module, which is connected to the current detection amplifier U1 to provide power; wherein the power management module includes a low differential voltage linear regulator U2, a first capacitor C1 and a second capacitor C2; the input interface of the low differential voltage linear regulator U2 is connected to one end of the first capacitor C1 and the N+ interface of the current detection amplifier U1, the output interface of the low differential voltage linear regulator U2 is connected to one end of the second capacitor C2 and the VS interface of the current detection amplifier U1, and the first capacitor C1 and the second capacitor C2 are grounded respectively.

[0033] The current detection unit 3 also includes an overvoltage protection module, which is connected to the current detection amplifier U1 to protect the circuit; wherein the overvoltage protection module includes a fuse RV1, a TVS tube VD1 and a third capacitor C3; one end of the fuse RV1 is connected to the positive electrode of the external power supply, and the other end of the fuse RV1 is respectively connected to one end of the TVS tube VD1, one end of the third capacitor C3, one end of the first capacitor C1 and the resistor R1, the IN+ pin of the current detection amplifier U1, and the VIN pin of the low differential linear regulator U2, the other end of the TVS tube VD1 is connected to the negative electrode of the external power supply and grounded, and the other end of the third capacitor C3 is grounded.

[0034] In the embodiment of the utility model, the main control unit 4 includes an MCU chip, and the MCU chip is connected to the output end of the current detection amplifier U1 through an ADC converter of the GPIO.

[0035] The main control unit 4 also includes a Bluetooth transmitter, and the status monitoring unit 2 is provided with a Bluetooth receiver. The Bluetooth transmitter and the Bluetooth receiver are wirelessly connected via Bluetooth.

[0036] In actual application, the MCU chip of the main control unit 4 of the utility model is nRF52832-QFAA-R produced by NORDIC, the current detection unit 3 is INA181 produced by ATEL produced by TI, and the state monitoring unit 2 is ZAZU produced by ATEL.

[0037] The working process of the utility model includes: installing the circuit board 1 inside a sealed shell, exposing the power supply line and the detection current line, and the overall sealing can fully waterproof and improve safety, while preventing damage caused by short circuit of the electrical appliance. The main control unit 4 is directly powered by the load power supply and powers the current detection amplifier U1 and the low differential voltage linear regulator U2 through the protection circuit. The current detection unit 3 is connected in series with the load device 5 to power the load device 5 and take the current value, and transmits the current data to the main control unit 4 through the ADC converter. The state monitoring unit 2 receives the ADC value of the main control unit 4 to detect the current state, reads the working current of the load device 5 in real time, and provides a real-time alarm when the load device 5 is abnormal.

[0038] The load current monitoring device of the utility model can distinguish the working state of the load, provide real-time alarm when the load equipment is abnormal, and transmit information via Bluetooth, thereby reducing manual observation, improving safety, saving manpower and reducing costs.

[0039] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.

[0040] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A load current monitoring device, characterized in that: It includes a circuit board and a state monitoring unit, wherein the circuit board is provided with a current detection unit and a main control unit; The input end of the current detection unit is connected to the load device to detect the current of the load device; The output end of the current detection unit is connected to the main control unit to feed back the load current; The state monitoring unit is wirelessly connected to the main control unit to receive the working state of the main control unit.

2. The monitoring device according to claim 1, characterized in that: The current detection unit comprises a current detection amplifier, a pin on one side of the current detection amplifier is connected to the positive electrode of the load device, and a pin on the other side of the current detection amplifier is connected to the negative electrode of the load device and is grounded.

3. The monitoring device according to claim 2, characterized in that: The current detection unit further includes a power management module, and the power management module is connected to the current detection amplifier to provide power; The power management module includes a low differential voltage linear regulator, a first capacitor and a second capacitor; The input interface of the low differential voltage linear regulator is connected to one end of the first capacitor and the N+ interface of the current detection amplifier, the output interface of the low differential voltage linear regulator is connected to one end of the second capacitor and the VS interface of the current detection amplifier, and the first capacitor and the second capacitor are grounded respectively.

4. The monitoring device according to claim 2, characterized in that: The current detection unit further includes an overvoltage protection module, which is connected to the current detection amplifier to protect the circuit; The overvoltage protection module includes a fuse, a TVS tube and a third capacitor; One end of the fuse is connected to the positive electrode of the external power supply, and the other end of the fuse is respectively connected to one end of the TVS tube, one end of the third capacitor and the resistor; the other end of the TVS tube is connected to the negative electrode of the external power supply and grounded, and the other end of the third capacitor is grounded.

5. The monitoring device according to claim 2, characterized in that: The main control unit comprises an MCU chip, and the MCU chip is connected to the output end of the current detection amplifier via an ADC converter of a GPIO.

6. The monitoring device according to claim 1, characterized in that: The main control unit also includes a Bluetooth transmitter, the status monitoring unit is provided with a Bluetooth receiver, and the Bluetooth transmitter is wirelessly connected to the Bluetooth receiver via Bluetooth.

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