Electric energy meter capable of automatically cutting off fault module power supply to ensure basic metering function

Abstract

The invention discloses an electric energy meter capable of automatically cutting off a fault module power supply to ensure a basic metering function, and relates to the field of electric energy meters, the electric energy meter comprises a switching power supply, and a metering function module, an MCU processor and a branch power supply module which are connected with the switching power supply, a Bluetooth module, a liquid crystal module, a temperature detection module, a quality analysis module, a load identification module, an electric red module and an in-meter temperature controller are connected to the upper portion of the electric energy meter body, a data storage device is connected to the MCU processor, and the MCU processor is connected with the branch power supply modules in multiple control modes. The Bluetooth module, the liquid crystal module and the temperature detection module are provided with a monitoring circuit 1. When one of the modules is damaged, a switching triode is used for cutting off a power supply, a current limiting chip is used for controlling a switch, and a temperature monitoring relay is used for controlling; and a basic metering function is ensured by automatically cutting off a fault module power supply.

Description

Technical Field

[0001] The invention relates to the field of electric energy meters, in particular to an electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure a basic metering function. Background Art

[0002] With the development of science and technology, in addition to the basic metering function, the electricity meter has many other functions, such as module communication (Bluetooth communication, carrier communication, micro-power communication, etc.), quality analysis module, load identification module, and even adding an electric Hong module to run the Hongmeng system to meet more complex requirements.

[0003] As there are more and more functional modules, but all of them work based on the electricity meter, when a functional module is damaged, the function of the electricity meter will become unusable, which poses a considerable challenge to the reliability of the meter. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide an electric energy meter that can automatically cut off the power supply of the faulty module to ensure the basic metering function, so as to solve the technical problem that when the functional module is damaged, the function of the electric energy meter cannot be used, which poses a considerable challenge to the reliability of the meter.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric energy meter that can automatically cut off the power supply of a faulty module to ensure basic metering functions, comprising a switching power supply and a metering function module connected to the switching power supply, an MCU processor and a sub-power supply module, the metering function module is the main body of the electric energy meter, and a Bluetooth module, a liquid crystal module, a temperature detection module, a quality analysis module, a load identification module, a power module and a temperature control inside the meter are respectively connected to the top of the electric energy meter main body, a data storage device is connected to the MCU processor, and the MCU processor is connected to the sub-power supply module through a variety of control methods, a monitoring circuit 1 is provided on the Bluetooth module, the liquid crystal module and the temperature detection module, a monitoring circuit 2 is provided on the quality analysis module, the load identification module and the power module, and a monitoring circuit 3 is provided on the temperature control inside the meter.

[0006] The present invention is further configured such that the Bluetooth communication module, the liquid crystal display module and the temperature monitoring module have separate processors and are inseparable modules, the monitoring circuit 1 is a heartbeat monitoring module, and the MCU of the single meter and the MCUs between the modules perform regular heartbeat responses; when the response is normal, the power supply is normal; otherwise, the power supply of the corresponding module is cut off.

[0007] The present invention is further configured such that the power cut-off of the circuit monitoring 1 is a control mode of a switching transistor, a transistor (QB1) is provided in the control of the switching transistor, the transistor is connected to a power input terminal and a ground terminal, and a resistor 1 (RB4) is installed on the signal input terminal (VBLE) of the transistor, wherein a resistor 2 (RB8) is connected between the signal input terminal and the power terminal of the transistor, and a capacitor C connected to the transistor is installed on the ground terminal.

[0008] The present invention is further configured such that the quality analysis module, load identification module, power module and the like have separate processors and can be freely separated. The circuit monitoring 2 is monitored in the form of current monitoring, that is, the maximum current used by each module is estimated, and the maximum value is multiplied by a margin of 0.5; when the working current does not exceed the limit value, the power supply of each module is normal; otherwise, the power supply of the corresponding module is cut off; the power supply is cut off by the control method of the current limiting chip.

[0009] The present invention is further configured such that the circuit monitoring 2 is controlled by a current limiting chip, a control chip UN4 is provided in the current limiting chip control, and a diode DN1 is connected to pin 1 of the control chip.

[0010] The present invention is further configured such that the circuit monitoring 3 performs temperature monitoring on the household current of the meter. If the internal temperature of the monitored meter rises sharply in a short time and exceeds the normally designed 100°C, the built-in relay will be controlled to trip to protect the safety of the meter measurement.

[0011] The present invention is further configured such that the sub-power supply module includes power supply 1, power supply 2, power supply 3, power supply 4, power supply 5, power supply 6 and power supply 7, and the multiple power supplies on the sub-power supply module are respectively connected to the Bluetooth module, liquid crystal module, temperature detection module, quality analysis module, load identification module, electric Hong module and temperature control inside the meter.

[0012] The present invention is further configured such that the data storage device includes a solid state drive (SSD), a hard disk drive (HDD), a main memory of a computer, an optical disk, a USB flash drive, and cloud storage.

[0013] The present invention is further configured such that the working process of the electric energy meter body includes:

[0014] The power supply of the S1 meter is provided by a switching power supply, and then the power input end of each module is switched by a transistor, and then the voltage is adjusted by a three-terminal regulator or a DCDC power chip, and then input to the corresponding module. The power supplies of the Bluetooth module, LCD module, temperature detection module, quality analysis module, load identification module, Dianhong module and the temperature control module in the meter are independent of each other;

[0015] After the S2 module is abnormal, the monitoring method is: the MCU will perform power on and off operations three times according to the protocol to check whether the module is really abnormal. If it fails three times, the power will be completely turned off until the meter power is reset or a new module is detected. If the detection is successful, the abnormality is resolved and the meter MCU will monitor again according to the protocol;

[0016] After the S3 module is abnormal, for the current abnormal mode: after detecting that the current is less than the control current, it will be restored immediately;

[0017] After the S4 module is abnormal, for the temperature monitoring method: when the temperature is detected to be less than a certain multiple of the control value and the duration is between 8 minutes and 20 minutes, the relay closes.

[0018] The present invention is further configured such that the control value multiple of the temperature monitoring is 0.5 to 0.8 times, optimally 0.7 times, and the duration is optimally greater than 10 minutes.

[0019] In summary, the present invention mainly has the following beneficial effects: the power supply of the meter is provided by a switching power supply, and then the power input end of each module is switched by a transistor, and then the voltage is adjusted by a three-terminal regulator or a DCDC power chip, and then input to the corresponding module. The power supplies of the Bluetooth module, LCD module, temperature detection module, quality analysis module, load identification module, Dianhong module and the temperature control module in the meter are independent of each other; after the module is abnormal, for the monitoring method: the MCU will perform power switch operations 3 times according to the protocol to check whether the module is really abnormal. If all 3 times fail, the power will be completely turned off until the meter power is reset or a new module is detected to be replaced. If the detection is successful, the abnormality is resolved, and the meter MCU will monitor according to the protocol again; after the module is abnormal For the current abnormality mode: after detecting that the current is less than the control current, it will be restored immediately; after the module is abnormal, for the temperature monitoring mode: when the temperature is detected to be less than 0.7 times the control value and the duration is greater than 10 minutes, the relay is closed, and the Bluetooth module, LCD module, temperature detection module, quality analysis module, load identification module, Dianhong module and temperature control in the meter are monitored respectively by circuit monitoring 1, circuit monitoring 2 and circuit monitoring 3 according to the characteristics of each module, and when one of the modules is damaged, the power supply is cut off by the switching transistor, the current limiting chip controls the switch and the temperature monitoring relay is controlled, thereby avoiding affecting the normal use of the main body of the electric energy meter when the module is damaged, and improving the automatic power cut-off of the faulty module to ensure the basic metering function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the process of automatically cutting off a faulty module according to the present invention;

[0021] Figure 2It is a structural schematic diagram of the switch triode circuit of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the current limiting chip control circuit of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] An electric energy meter that can automatically cut off the power supply of the faulty module to ensure basic metering functions, such as Figure 1-3 As shown, it includes a switching power supply and a metering function module connected to the switching power supply, an MCU processor and a sub-power supply module, the metering function module is the main body of the electric energy meter, and the upper part of the electric energy meter body is respectively connected with a Bluetooth module, a liquid crystal module, a temperature detection module, a quality analysis module, a load identification module, a power module and a temperature control inside the meter, the MCU processor is connected with a data storage device, and the MCU processor is connected to the sub-power supply module through a variety of control methods, the Bluetooth module, the liquid crystal module and the temperature detection module are provided with a monitoring circuit 1, the quality analysis module, the load identification module and the power module are provided with a monitoring circuit 2, and the temperature control inside the meter is provided with a monitoring circuit 3.

[0025] The Bluetooth communication module, LCD display module and temperature monitoring module have separate processors and are inseparable modules. The monitoring circuit 1 is a heartbeat monitoring module. The MCU of the single meter and the MCU between each module perform regular heartbeat responses. When the response is normal, the power supply is normal; otherwise, the power supply of the corresponding module is cut off.

[0026] The power cut-off of the circuit monitoring 1 is a control method of a switch transistor, wherein a transistor (QB1) is provided in the control of the switch transistor, the transistor is connected to a power input terminal and a ground terminal, and a resistor 1 (RB4) is installed on the signal input terminal (VBLE) of the transistor, wherein a resistor 2 (RB8) is connected between the signal input terminal and the power terminal of the transistor, and a capacitor C connected to the transistor is installed on the ground terminal.

[0027] The quality analysis module, load identification module, power module and other modules have independent processors and can be separated freely. The circuit monitoring 2 is monitored in the form of current monitoring, that is, the maximum current used by each module is estimated, and the maximum value is multiplied by 0.5 times as a margin; when the working current does not exceed the limit value, each module is powered normally; otherwise, the power supply of the corresponding module is cut off; the power supply is cut off by the control method of the current limiting chip.

[0028] The circuit monitoring 2 is controlled by a current limiting chip, in which a control chip UN4 is provided, and a diode DN1 is connected to pin 1 of the control chip.

[0029] The circuit monitoring 3 performs temperature monitoring on the current entering the household. If the internal temperature of the monitored meter rises sharply in a short time and exceeds the normally designed 100°C, the built-in relay will be controlled to trip to protect the safety of the meter.

[0030] The sub-power supply module includes power supply 1, power supply 2, power supply 3, power supply 4, power supply 5, power supply 6 and power supply 7, and the multiple power supplies on the sub-power supply module are respectively connected to the Bluetooth module, liquid crystal module, temperature detection module, quality analysis module, load identification module, electric Hong module and temperature control inside the meter.

[0031] The data storage device includes a solid state drive (SSD), a mechanical hard disk (HDD), a computer's main memory, an optical disk, a USB flash drive, and cloud storage.

[0032] The working process of the main body of the electric energy meter includes: the power supply of the S1 meter is provided by a switching power supply, and then the power input end of each module is switched by a transistor, and then the voltage is adjusted by a three-terminal regulator or a DCDC power chip, and then input to the corresponding module. The power supplies of the Bluetooth module, LCD module, temperature detection module, quality analysis module, load identification module, Dianhong module and the temperature control module in the meter are independent of each other;

[0033] After the S2 module is abnormal, the monitoring method is: the MCU will perform power on and off operations three times according to the protocol to check whether the module is really abnormal. If it fails three times, the power will be completely turned off until the meter power is reset or a new module is detected. If the detection is successful, the abnormality is resolved and the meter MCU will monitor again according to the protocol;

[0034] After the S3 module is abnormal, for the current abnormal mode: after detecting that the current is less than the control current, it will be restored immediately;

[0035] After the S4 module is abnormal, for the temperature monitoring method: when the temperature is detected to be less than a certain multiple of the control value and the duration is between 8 minutes and 20 minutes, the relay closes.

[0036] The present invention is further configured such that the control value multiple of the temperature monitoring is 0.5 to 0.8 times, optimally 0.7 times, and the duration is optimally greater than 10 minutes.

[0037] The working principle of the present invention is as follows: the power supply of the meter is provided by a switching power supply, and then the power input end of each module is switched by a transistor, and then the voltage is adjusted by a three-terminal regulator or a DCDC power chip, and then input to the corresponding module. The power supplies of the Bluetooth module, LCD module, temperature detection module, quality analysis module, load identification module, Dianhong module and the temperature control module in the meter are independent of each other; after the module is abnormal, for the monitoring method: the MCU will perform power switch operations 3 times according to the protocol to check whether the module is really abnormal. If all 3 times fail, the power supply will be completely turned off until the meter power is reset or a new module is detected to be replaced. If the detection is successful, the abnormality is resolved, and the meter MCU will monitor again according to the protocol; after the module is abnormal, for the current abnormality method: after detecting that it is less than the control current, it will be restored immediately; after the module is abnormal, for the temperature monitoring method: when the temperature is detected to be less than 0.7 times the control value and the duration is greater than 10 minutes, the relay will be closed.

[0038] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An electric energy meter that can automatically cut off the power supply of a faulty module to ensure basic metering functions, comprising a switching power supply and a metering function module connected to the switching power supply, an MCU processor and a power supply module, characterized in that: The metering function module is the main body of the electric energy meter, and the Bluetooth module, liquid crystal module, temperature detection module, quality analysis module, load identification module, electric power module and temperature control inside the meter are respectively connected to the top of the electric energy meter body. The MCU processor is connected to a data storage device, and the MCU processor is connected to the power supply module through a variety of control methods. The Bluetooth module, liquid crystal module and temperature detection module are provided with a monitoring circuit 1, the quality analysis module, load identification module and electric power module are provided with a monitoring circuit 2, and the temperature control inside the meter is provided with a monitoring circuit 3.

2. According to claim 1, an electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering functions is characterized in that: The Bluetooth communication module, the liquid crystal display module and the temperature monitoring module have separate processors and are inseparable modules. The monitoring circuit 1 is a heartbeat monitoring module. The MCU of the single meter and the MCU between each module perform regular heartbeat responses. When the response is normal, the power supply is normal; Otherwise, cut off the power supply of the corresponding module.

3. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering functions according to claim 2, characterized in that: The power cut-off of the circuit monitoring 1 is a control method of a switch transistor, wherein a transistor (QB1) is provided in the control of the switch transistor, the transistor is connected to a power input terminal and a ground terminal, and a resistor 1 (RB4) is installed on the signal input terminal (VBLE) of the transistor, wherein a resistor 2 (RB8) is connected between the signal input terminal and the power terminal of the transistor, and a capacitor C connected to the transistor is installed on the ground terminal.

4. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering function according to claim 1, characterized in that: The quality analysis module, load identification module, and electric power module are modules with independent processors and can be separated freely. The circuit monitoring 2 is monitored by current monitoring, that is, the maximum current used by each module is estimated, and the maximum value is multiplied by 0.5 times the margin; when the working current does not exceed the limit value, the power supply of each module is normal; Otherwise, cut off the power supply of the corresponding module; The power supply is cut off by using a current limiting chip control method.

5. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering function according to claim 4, characterized in that: The circuit monitoring 2 is controlled by a current limiting chip, in which a control chip UN4 is provided, and a diode DN1 is connected to pin 1 of the control chip.

6. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering functions according to claim 1, characterized in that: The circuit monitoring 3 performs temperature monitoring on the current entering the household. If the internal temperature of the monitored meter rises sharply in a short time and exceeds the normally designed 100°C, the built-in relay will be controlled to trip to protect the safety of the meter.

7. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering functions according to claim 1, characterized in that: The sub-power supply module includes power supply 1, power supply 2, power supply 3, power supply 4, power supply 5, power supply 6 and power supply 7, and the multiple power supplies on the sub-power supply module are respectively connected to the Bluetooth module, liquid crystal module, temperature detection module, quality analysis module, load identification module, electric Hong module and temperature control inside the meter.

8. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering functions according to claim 1, characterized in that: The data storage device includes a solid state drive (SSD), a mechanical hard disk (HDD), a computer's main memory, an optical disk, a USB flash drive, and cloud storage.

9. An electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering functions according to any one of claims 1 to 8, characterized in that: The working process of the electric energy meter body includes: The power supply of the S1 meter is provided by a switching power supply, and then the power input end of each module is switched by a transistor, and then the voltage is adjusted by a three-terminal regulator or a DCDC power chip, and then input to the corresponding module. The power supplies of the Bluetooth module, LCD module, temperature detection module, quality analysis module, load identification module, Dianhong module and the temperature control module in the meter are independent of each other; After the S2 module is abnormal, the monitoring method is: the MCU will perform power on and off operations three times according to the protocol to check whether the module is really abnormal. If it fails three times, the power will be completely turned off until the meter power is reset or a new module is detected. If the detection is successful, the abnormality is resolved and the meter MCU will monitor again according to the protocol; After the S3 module is abnormal, for the current abnormal mode: after detecting that the current is less than the control current, it will be restored immediately; After the S4 module is abnormal, for the temperature monitoring method: when the temperature is detected to be less than a certain multiple of the control value and the duration is between 8 minutes and 20 minutes, the relay closes.

10. The electric energy meter capable of automatically cutting off the power supply of a faulty module to ensure basic metering function according to claim 9, characterized in that: The control value multiple of the temperature monitoring is 0.5 to 0.8 times, preferably 0.7 times, and the duration is preferably greater than 10 minutes.

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