Module Power-on Detection Device for Smart Electric Energy Meters Based on the Ubiquitous Power Internet of Things

Abstract

The present invention relates to a module power-on detection device for an intelligent electricity meter based on the ubiquitous power Internet of Things, which includes a circuit board. The circuit board includes a switching power supply, a first management core module interface, a second management core module interface, and a control chip. The circuit board includes a first power supply circuit and a second power supply circuit. A host computer is connected to the control chip. The advantages of the present invention are as follows: The management core module is fixed through the first management core module interface and the second management core module interface. The control chip sends PF signals and CLK signals to the first management core module interface, enabling the entire device to perform functional tests on the management core module. The control chip sends second synchronization signals and management core module plug-and-unplug signals to the second management core module interface, which can realize the communication between the management core module and the device. For the management core module plug-and-unplug signal, when the management core module is unplugged, the signal is at a low level, and the host computer can count the number of module plug-and-unplugs through this signal.

Description

Technical Field

[0001] The present invention relates to a module power-on detection device for an intelligent electricity meter based on the ubiquitous power Internet of things. Background Art

[0002] International Recommendation 46 (hereinafter referred to as IR46), "Active Energy Meter", was developed by Technical Committee 12 (hereinafter referred to as TC12), "Technical Committee for Electrical Quantity Measuring Instruments", of the International Organization of Legal Metrology (hereinafter referred to as OIML), and was approved and released in October 2012. OIML is an international legal metrology institution, and China is a member state. The IR series of documents of this institution are international metrology regulatory documents. Once released, all OIML member states are required to adopt and implement them.

[0003] The OIML R46-1-2 standard and the OIML R46-3 2013 standard released in 2012 require that the electronic devices and components of the electricity meter be separated, the metering function and other functions be independent of each other, and the online upgrade of the non-metering part software does not affect the accuracy and stability of the metering part. The current standard electricity meters in China are of an integrated design. Once a hardware or software failure occurs, only the whole meter can be replaced to ensure the smooth progress of power metering work. And from the perspective of security to prevent tampering with the electricity meter program, online software upgrade of the electricity meter is not allowed. Therefore, the relevant departments of the State Grid issued the "Requirement Specification for 'Dual-Core' Smart Meters Based on IR46" in August 2016 and the revised technical standard of the "Technical Solution for Multi-Core Modular Single-Phase Intelligent Electricity Meters" in July 2019.

[0004] Based on the above background, the technical route of the next-generation intelligent electricity meter based on the IR46 standard has been clarified. The metering function and management function of the electricity meter are independent of each other and adopt a modular design respectively. And multi-core modular intelligent meters also adopt modular production and modular testing in research, production, and testing. Based on the current test verification means, test equipment, and test tooling, they can no longer meet the production test requirements of multi-core module meters. Summary of the Invention

[0005] The object to be achieved by the present invention is to provide a module power-on detection device for an intelligent electricity meter based on the ubiquitous power Internet of things, which can meet the production test requirements of multi-core modular intelligent electricity meters.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions: A module power-on detection device for an intelligent electricity meter based on the ubiquitous power Internet of Things, including a bottom plate and a housing. The housing is arranged on the bottom plate. A circuit board is provided on the bottom plate. The circuit board includes a switching power supply, a first management core module interface, a second management core module interface, and a control chip. The circuit board includes a first power supply circuit and a second power supply circuit. The switching power supply supplies power to the first management core module interface through the first power supply circuit, and the switching power supply supplies power to the second management core module interface through the second power supply circuit. The first management core module interface and the second management core module interface are respectively connected to the control chip. The control chip conveys a PF signal and a CLK signal to the first management core module interface, and the control chip conveys a second synchronization signal and a management core module plug-and-unplug signal to the second management core module interface. A host computer is connected to the control chip.

[0007] Preferably, a 485 communication interface is provided on the control chip. The 485 communication interface is connected to the host computer through a connecting wire. One end of the connecting wire is provided with an interface connected to the 485 communication interface, and the other end of the connecting wire is provided with a USB interface.

[0008] Preferably, a switch button for controlling the power-on and power-off of the switching power supply is provided on the circuit board.

[0009] Preferably, a power indicator light is also connected to the control chip. When the switching power supply is powered on, the power indicator light is on, and when the switching power supply is powered off, the power indicator light is off.

[0010] Preferably, a communication indicator light is also connected to the control chip.

[0011] Preferably, a 32.768 kHz crystal oscillator circuit is connected to the control chip.

[0012] Preferably, a Bluetooth communication module is also connected to the control chip.

[0013] Preferably, a power module is connected to the second power supply circuit. The power module converts the power of the second power supply circuit into the working voltage of the control chip.

[0014] Preferably, a 220VAC power input interface is provided on the switching power supply, and a live wire and a neutral wire are connected to the 220VAC power input interface.

[0015] Preferably, a first row of wire grooves for arranging the live wire and a second row of wire grooves for arranging the neutral wire are provided on the bottom plate. A first pressing block matched with the first row of wire grooves and a second pressing block matched with the second row of wire grooves are provided on the housing. The live wire is fixed in the first row of wire grooves by the pressure of the first pressing block, and the neutral wire is fixed in the second row of wire grooves by the pressure of the second pressing block.

[0016] In summary, the advantages of the present invention are as follows: The management core module is fixed through the first management core module interface and the second management core module interface. The control chip conveys the PF signal and the CLK signal to the first management core module interface, enabling the entire device to perform functional tests on the management core module. The control chip conveys the second synchronization signal and the management core module plugging and unplugging signal to the second management core module interface, enabling communication between the management core module and the device. For the management core module plugging and unplugging signal, when the management core module is unplugged, the signal is at a low level, and the host computer can use this signal to count the number of module pluggings and unplugging. The connection between the control chip and the host computer enables the networking detection of multiple devices in a group, playing an important inspection role in the development, production, and on-site inspection and testing of watt-hour meters. Secondly, the first management core module interface and the second management core module interface facilitate the plugging and unplugging of the management core module, and have a good fixing effect. Finally, the first power supply circuit and the second power supply circuit on the circuit board supply power to the first management core module interface and the second management core module interface respectively, enabling the management core module to be powered on independently and the power-on detection can be performed through the control chip. Thus, the entire device is an integrated inspection device for power-on and functional tests, and the entire device is integrated within the bottom plate and the outer shell, facilitating overall portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] Figure 1 is a schematic structural diagram of the module power-on detection device for the intelligent watt-hour meter based on the ubiquitous power Internet of Things of the present invention;

[0019] Figure 2 is a schematic structural diagram of the circuit board in the present invention;

[0020] Figure 3 is a schematic structural diagram of the live wire and the neutral wire on the bottom plate and the outer shell in the present invention.

[0021] Reference numerals:

[0022] 1 bottom plate, 11 first row of wire grooves, 12 second row of wire grooves, 2 outer shell, 21 first pressing block, 22 second pressing block, 3 circuit board, 31 first power supply circuit, 32 second power supply circuit, 33 switch button, 34 power supply module, 4 switching power supply, 40 220VAC power input interface, 41 live wire, 42 neutral wire, 5 first management core module interface, 6 second management core module interface, 7 control chip, 71 485 communication interface, 72 connecting wire, 73 power indicator light, 74 communication indicator light, 75 32.768kHz crystal oscillator circuit, 76 Bluetooth communication module, 8 host computer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] As Figure 1 、Figure 2 , Figure 3 As shown in Figure 3 , the power-on detection device for the module of the ubiquitous power Internet of Things intelligent electricity meter includes a bottom plate 1 and a housing 2. The housing 2 is arranged on the bottom plate 1. A circuit board 3 is provided on the bottom plate 1. The circuit board 3 includes a switching power supply 4, a first management core module interface 51, a second management core module interface 6, and a control chip 7. The circuit board 3 includes a first power supply circuit 31 and a second power supply circuit 32. The power supply voltage of the first power supply circuit 31 is +15V, and the maximum load current of the first power supply circuit 31 is 350mA. The power supply voltage of the second power supply circuit 32 is +5V, and the maximum load current of the second power supply circuit 32 is 50mA. The switching power supply 4 supplies power to the first management core module interface 51 through the first power supply circuit 31. The switching power supply 4 supplies power to the second management core module interface 6 through the second power supply circuit 32. The first management core module interface 51 and the second management core module interface 6 are respectively connected to the control chip 7. The control chip 7 sends a PF signal and a CLK signal to the first management core module interface 51. The control chip 7 sends a second synchronization signal and a management core module plugging and unplugging signal to the second management core module interface 6. A host computer 8 is connected to the control chip 7.

[0024] The management core module is fixed through the first management core module interface 51 and the second management core module interface 6. By sending a PF signal and a CLK signal to the first management core module interface 51 through the control chip 7, the whole device can perform a function test on the management core module. By sending a second synchronization signal and a management core module plugging and unplugging signal to the second management core module interface 6 through the control chip 7, communication between the management core module and the device can be realized. For the management core module plugging and unplugging signal, when the management core module is unplugged, the signal is at a low level, and the host computer 8 can count the number of times of module plugging and unplugging through this signal. The connection between the control chip 7 and the host computer 8 can realize the joint network detection of multiple devices, which plays a very important inspection role in the development and production of electricity meters and on-site inspection and testing. Secondly, the first management core module interface 51 and the second management core module interface 6 facilitate the plugging and unplugging of the management core module, and the fixing effect is good. Finally, by respectively supplying power to the first management core module interface 51 and the second management core module interface 6 through the first power supply circuit 31 and the second power supply circuit 32 on the circuit board 3, the management core module can be powered on independently, and power-on detection can be performed through the control chip 7. Thus, the whole device is an integrated inspection device for power-on and function testing, and the whole device is integrated in the bottom plate 1 and the housing 2, which is convenient for overall carrying.

[0025] The control chip 7 is provided with a 485 communication interface 71. The 485 communication interface 71 is connected to the host computer 8 through a connection line 72. One end of the connection line 72 is provided with an interface connected to the 485 communication interface 71, and the other end of the connection line 72 is provided with a USB interface. In addition, in order to eliminate the safety hazards when the connection line 72 is connected to a strong terminal, the 485 communication interface 71 in this embodiment adopts a high-voltage-resistant optocoupler electrical isolation circuit. The 485 communication rate is 19,200 bps, with a communication baud rate self-adaptive function and a surge protection device, enabling the device to read and write the operation data in the management core that complies with the standards of "DL / T 645-2007 Multifunctional Watt-hour Meter Communication Protocol" and "Q / GQW 11778-2017 Object-Oriented Power Consumption Information Data Exchange Protocol".

[0026] The switching power supply 4 has an input with a wide voltage range of 80V - 380VAC, soft start technology, and has multiple protection functions such as overload protection, over-temperature protection, and over-current protection. The isolation voltage can reach 4.5 kV to protect the human body from electric shock. A switch button 33 for controlling the power-on and power-off of the switching power supply 4 is provided on the circuit board 3. The setting of the switch button 33 can effectively control the power-on and power-off of the switching power supply 4, avoid the conduction of the switching power supply 4 when the device is not working, and improve the safety performance. A power indicator light 73 is also connected to the control chip 7. When the switching power supply 4 is powered on, the power indicator light 73 is on, and when the switching power supply 4 is powered off, the power indicator light 73 is off, facilitating the operator to observe and obtain the power-on situation of the device.

[0027] A communication indicator light 74 is also connected to the control chip 7. When the management core communicates with the device, the communication indicator light 74 can emit light, facilitating the operator to observe and obtain the communication situation of the device. The control chip 7 in this embodiment uses Shanghai Fudan Micro FM33A048, ARM Cortex-M0 + kernel. Therefore, a 32.768 kHz crystal oscillator circuit 75 needs to be connected to the control chip 7 to generate an RTC clock signal. A Bluetooth communication module 76 is also connected to the control chip 7. The Bluetooth communication module 76 has a version of 4.2, a working frequency of 2.4 GHz, a power level of class 2, and a communication rate that supports 4800, 9600 bps, and 19200 bps. The internal Bluetooth module of the device can realize the connection and data communication with the management core module, mobile PDA, and smart phone.

[0028] A power supply module 34 is connected to the second power supply circuit 32. The power supply module 34 converts the power of the second power supply circuit 32 into the operating voltage of the control chip 7, which can ensure the continuous power supply of the control chip 7. In this embodiment, the operating voltage of the control chip 7 is 3.3V, and the selected power supply module 34 includes current limiting protection, high precision, and voltage stabilizing functions.

[0029] The switching power supply 4 is provided with a 220VAC power input interface 40, and a live wire 41 and a neutral wire 42 are connected to the 220VAC power input interface 40, enabling the switching power supply 4 to access 220VAC voltage. The bottom plate 1 is provided with a first row of wire grooves 11 for arranging the live wire 41 and a second row of wire grooves 12 for arranging the neutral wire 42. The outer shell 2 is provided with a first pressing block 21 that cooperates with the first row of wire grooves 11 and a second pressing block 22 that cooperates with the second row of wire grooves 12. The live wire 41 is fixed in the first row of wire grooves 11 by the pressure of the first pressing block 21, and the neutral wire 42 is fixed in the second row of wire grooves 12 by the pressure of the second pressing block 22, which is beneficial to the rapid installation and arrangement of the live wire 41 and the neutral wire 42. Moreover, when the outer shell 2 and the bottom plate 1 cooperate, the acting forces generated by the first pressing block 21 and the second pressing block 22 press the live wire 41 and the neutral wire 42, improving the fixing quality of the live wire 41 and the neutral wire 42 and simplifying the entire installation and fixing structure.

[0030] In addition to the above preferred embodiments, the present invention has other implementation manners. Those skilled in the art can make various changes and deformations according to the present invention. As long as they do not depart from the spirit of the present invention, they shall fall within the scope defined by the appended claims of the present invention.

Claims

1. Module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters, Characterized in that: It includes a bottom plate and a housing. The housing is arranged on the bottom plate. A circuit board is provided on the bottom plate. The circuit board includes a switching power supply, a first management core module interface, a second management core module interface, and a control chip. The circuit board includes a first power supply circuit and a second power supply circuit. The switching power supply supplies power to the first management core module interface through the first power supply circuit, and the switching power supply supplies power to the second management core module interface through the second power supply circuit. The first management core module interface and the second management core module interface are respectively connected to the control chip. The control chip conveys PF signal and CLK signal to the first management core module interface, and the control chip conveys second synchronization signal and management core module plugging and unplugging signal to the second management core module interface. The control chip is connected to a host computer. When the management core module is unplugged, the signal is at a low level, and the host computer can count the number of times of module plugging and unplugging through this signal. The connection between the control chip and the host computer is used to realize the joint network detection of multiple devices, which plays a very important inspection role in the development and production of electricity meters and on-site inspection and testing.

2. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: A 485 communication interface is provided on the control chip. The 485 communication interface is connected to the host computer through a connecting wire. One end of the connecting wire is provided with an interface connected to the 485 communication interface, and the other end of the connecting wire is provided with a USB interface.

3. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: A switch button for controlling the power-on and power-off of the switching power supply is provided on the circuit board.

4. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 3, Characterized in that: A power indicator light is also connected to the control chip. When the switching power supply is powered on, the power indicator light is on, and when the switching power supply is powered off, the power indicator light is off.

5. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: A communication indicator light is also connected to the control chip.

6. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: A 32.768 kHz crystal oscillator circuit is connected to the control chip.

7. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: A Bluetooth communication module is also connected to the control chip.

8. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: A power module is connected to the second power supply circuit. The power module converts the power of the second power supply circuit into the working voltage of the control chip.

9. The module power-on detection device for ubiquitous power Internet of Things intelligent electricity meters according to claim 1, Characterized in that: The switching power supply is provided with a 220VAC power input interface, and a live wire and a neutral wire are connected to the 220VAC power input interface.

10. The module power-on detection device for the ubiquitous power Internet of things intelligent electric energy meter according to claim 9, characterized in that: The bottom plate is provided with a first row of wire grooves for arranging the live wire and a second row of wire grooves for arranging the neutral wire. The outer shell is provided with a first pressing block matching with the first row of wire grooves and a second pressing block matching with the second row of wire grooves. The live wire is fixed in the first row of wire grooves by the pressure of the first pressing block, and the neutral wire is fixed in the second row of wire grooves by the pressure of the second pressing block.

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