Electric energy meter host

Abstract

The utility model discloses an electric energy meter host. The electric energy meter host comprises a processing module, a first key module and a display module; the first key module is connected with the processing module, the display module is connected with the processing module, and the processing module is configured to send a display signal to the display module according to the level of a key signal of the first key module and the duration of maintaining the effective level in the key signal. According to the technical scheme, the size of the electric energy meter host can be reduced, and the electric energy meter host can better display information.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy meter, especially relates to a kind of electric energy meter host computer. BACKGROUND

[0002] Multi-user electric energy meter includes host computer and multiple slave machines, and slave machine includes metering module, and electric power parameter can be collected.The data collected by each slave machine can be displayed on host computer, and multiple keys can be set on host computer, and different information can be displayed by pressing different keys.

[0003] But the host computer of the prior art can only simply display characters and numbers when displaying information, cannot better display multiple information, and the keys occupy a larger space, so that the volume of the host computer is larger, and the cost is higher. INVENTION CONTENTS

[0004] The utility model provides a kind of electric energy meter host computer to solve the problem that electric energy meter host computer cannot better display information and is larger in size.

[0005] The utility model provides a kind of electric energy meter host computer, and electric energy meter host computer includes: processing module, first key module and display module;

[0006] The first key module includes a key;The display module includes dot-matrix liquid crystal display screen;

[0007] The first key module is connected with the processing module, and the display module is connected with the processing module, and the processing module is configured to send display signal to the display module according to the level of the key signal of the first key module and the duration of maintaining effective level in the key signal.

[0008] Optionally, the first key module further includes: first resistor, second resistor and first capacitor;

[0009] The first end of the key is connected to the first end of the first capacitor through the second resistor, and the second end of the first capacitor is connected to the second power supply voltage;

[0010] The first resistor is connected between the first end of the key and the first end of the first capacitor, and the second end of the first capacitor is connected to the second power supply voltage;

[0011] The first end of the first capacitor is connected to the processing module.

[0012] Optionally, the electric energy meter host computer further includes first communication module and second communication module;

[0013] The first communication module is connected to the processing module, and the processing module is configured to communicate with server or host computer through the first communication module;

[0014] The second communication module is connected with the processing module, and the processing module is configured to communicate with the slave electric energy meter through the second communication module.

[0015] Optionally, the second communication module comprises a first communication chip, a third resistor and a fourth resistor.

[0016] The power supply end of the first communication chip is connected with a third power supply voltage.

[0017] The first communication end and the second communication end of the first communication chip are connected with the slave electric energy meter respectively.

[0018] The first end of the third resistor is connected with the sending end of the first communication chip, and the second end of the third resistor is connected with the first receiving end of the processing module.

[0019] The first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is connected with a second power supply voltage.

[0020] The input data end of the first communication chip is connected with the first sending end of the processing module.

[0021] Optionally, the master electric energy meter further comprises a third communication module and a first power supply module.

[0022] The enable end of the first power supply module is connected with the processing module.

[0023] The communication end of the third communication module is connected with the processing module, the power supply end of the third communication module is connected with the first power supply module, the first power supply module is configured to supply power for the third communication module in response to the first enable signal of the processing module, and the third communication module is configured to communicate with the processing module after being powered.

[0024] The master electric energy meter further comprises a fourth communication module and a first switch module.

[0025] The communication end of the fourth communication module is connected with the processing module, the first switch module is connected between the power supply end of the fourth communication module and the processing module, the enable end of the first switch module is connected with the processing module, and the fourth communication module is configured to communicate with the processing module when the first switch module is turned on in response to the second enable signal of the processing module.

[0026] The master electric energy meter further comprises a fifth communication module and a second switch module.

[0027] The communication end of the fifth communication module is connected with the processing module, the second switch module is connected between the power supply end of the fifth communication module and the processing module, the enable end of the second switch module is connected with the processing module, and the fifth communication module is configured to communicate with the processing module when the second switch module is turned on in response to the third enable signal of the processing module.

[0028] Optionally, the third communication module comprises a second communication chip, an eleventh resistor, a twelfth resistor, a first transistor, an eighth resistor, a ninth resistor, a tenth resistor and a second transistor.

[0029] The power supply end of the second communication chip is connected with the output end of the first power module, the receiving end of the second communication chip is connected with the first end of the fifth resistor, and the second end of the fifth resistor is connected with a fourth power supply voltage.

[0030] The first end of the first transistor is connected with the first end of the fifth resistor, the second end of the first transistor is connected with the second sending end of the processing module through the sixth resistor, and the control end of the first transistor is connected with a first power supply voltage through the seventh resistor; and the power supply end of the processing module is connected with the first power supply voltage.

[0031] The control end of the second transistor is connected with the fourth power supply voltage through the eighth resistor, the first end of the second transistor is connected with the second receiving end of the processing module through the ninth resistor, the first end of the second transistor is connected with the first power supply voltage through the tenth resistor, and the second end of the second transistor is connected with the sending end of the second communication chip.

[0032] Optionally, the fourth communication module comprises a third communication chip, an eleventh resistor and a twelfth resistor.

[0033] The power supply end of the third communication chip is connected with the first switch module, the first differential sending end of the third communication chip is connected with the processing module through the eleventh resistor, and the second differential sending end of the third communication chip is connected with the processing module through the twelfth resistor.

[0034] The fourth communication module further comprises a crystal chip and a thirteenth resistor.

[0035] The first end of the crystal chip is connected with the third communication chip, and the second end of the crystal chip is connected with the third communication chip through the thirteenth resistor.

[0036] Optionally, the electric energy meter host further comprises a first storage module and a second storage module.

[0037] The first storage module is connected with the processing module, and the first storage module is configured to store electric energy data of the electric energy meter slave.

[0038] The second storage module is connected with the processing module, and the second storage module is configured to store event records of the electric energy meter master and the electric energy meter slave and store upgrade information.

[0039] Optionally, the first storage module comprises a ferroelectric memory, and the second storage module comprises a flash memory.

[0040] Optionally, the electric energy meter master further comprises a second power module, the second power module is connected with the first power module, and the second power module is configured to provide an input voltage for the first power module.

[0041] The electric energy meter master further comprises a debugging output interface.

[0042] The debugging output interface is connected with the processing module, and the debugging output interface is configured to output running information of the electric energy meter master.

[0043] The technical scheme of the electric energy meter master provided in the embodiment of the utility model, through setting first button module including a button, make button quantity less, can reduce the volume of electric energy meter master. And display module includes dot matrix liquid crystal display, compared with commonly used segment code liquid crystal display, can display more information, and resolution is higher, realizes better display information.

[0044] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, nor is it used to limit the scope of the utility model. Other features of the utility model will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0046] Figure 1 is a circuit structure schematic view of an electric energy meter master provided by the embodiment of the utility model;

[0047] Figure 2 is a circuit structure schematic view of another electric energy meter master provided by the embodiment of the utility model;

[0048] Figure 3It is the circuit structure schematic view of the electric energy meter host provided by the embodiment of the utility model,

[0049] Figure 4 It is the circuit structure schematic view of the second communication module provided by the embodiment of the utility model,

[0050] Figure 5 It is the circuit structure schematic view of the first power module provided by the embodiment of the utility model,

[0051] Figure 6 It is the circuit structure schematic view of the third communication module provided by the embodiment of the utility model,

[0052] Figure 7 It is the circuit structure schematic view of the fourth communication module and the first switch module provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0053] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiment of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, but not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor should belong to the scope of the utility model protection.

[0054] It should be noted that the terms "first", "second" and the like in the description and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0055] The embodiment provides a kind of electric energy meter host, Figure 1 It is the circuit structure schematic view of the electric energy meter host provided by the embodiment of the utility model, reference Figure 1 , and the electric energy meter host includes: processing module 110, first button module 120 and display module 130;

[0056] First button module 120 includes a button S1;Display module 130 includes dot matrix liquid crystal display screen;

[0057] The first key module 120 is connected with the processing module 110, and the display module 130 is connected with the processing module 110. The processing module 110 is configured to send a display signal to the display module 130 according to the level of the key signal of the first key module 120 and the duration of maintaining the effective level in the key signal.

[0058] The power meter host can obtain the power parameters of each power meter slave, and the display module 130 can display the power parameters, so as to facilitate obtaining the power parameters of multiple users from the power meter host. The power meter slave includes a metering module, which can collect user power parameters. The processing module 110 includes a microprocessor or a single-chip microcomputer, and the present embodiment is not limited thereto. The key signal of the first key module 120 includes a high level and a low level. For example, when the key S1 in the first key module 120 is pressed, the key signal is at a low level, and when the key S1 in the first key module 120 is not pressed, the key signal is at a high level, and the effective level is at a low level. Alternatively, when the key S1 in the first key module 120 is pressed, the key signal is at a high level, and when the key S1 in the first key module 120 is not pressed, the key signal is at a low level, and the effective level is at a high level. The present embodiment is not limited thereto. For example, the first end of the key S1 is connected to a first power voltage VDD, and the second end of the key S1 is connected to a second power voltage. The first power voltage VDD is a positive voltage, and the second power voltage is a negative voltage or ground. Alternatively, the first power voltage VDD is a negative voltage or ground, and the second power voltage is a positive voltage. Figure 1 FIG. 2 shows the case where the first power voltage VDD is a positive voltage and the second power voltage is ground, but the present embodiment is not limited thereto.

[0059] Specifically, by providing that the first key module 120 includes one key S1, the number of keys is reduced, and the size of the host can be reduced. In addition, the display module 130 includes a dot-matrix liquid crystal display screen, which can display more information and has higher resolution than a commonly used segment code liquid crystal display screen, and can achieve better display information.

[0060] The processing module 110 can obtain the key signal of the first key module 120, so as to send different display signals to the display module 130 according to the duration of maintaining the effective level of the key signal and according to different durations of maintaining the effective level, so that the display module 130 displays different information.

[0061] For example, the display module 130 can display two layers of interfaces, and each layer of interface includes multiple interfaces. When the duration of maintaining the effective level of the key signal of the first key module 120 reaches a first preset duration (for example, 10s), it indicates that the duration of pressing the key S1 reaches the first preset duration, and the switching between different layers of interfaces can be performed, i.e., switching from the first layer of interface to the second layer of interface, or switching from the second layer of interface to the first layer of interface.

[0062] When the maintaining duration of the active level of the key signal of the first key module 120 reaches the second preset duration and is less than the first preset duration, and the interval duration between the adjacent two active levels is greater than the preset interval duration (for example, 0.5s), it is indicated that the short press of the key S1 is paused, and different interfaces in the same layer interface can be switched, for example, in the first layer interface, the display of the current interface is switched to the display of the next interface.

[0063] When the maintaining duration of the active level of the key signal of the first key module 120 reaches the second preset duration and is less than the first preset duration, and the interval duration between the adjacent two active levels is less than or equal to the preset interval duration, it is indicated that the key S1 is continuously pressed, and 10 interfaces in the same layer interface can be slid forward, and if the last interface is reached, the first interface of the current layer interface is returned.

[0064] For example, in the first layer interface, the display module 130 can display the brief information of the master and the slave of the electric energy meter, and in the second layer interface, the display module 130 can display the detailed information of the master and the slave of the electric energy meter.

[0065] For example, in the first layer interface, the display module 130 can display the number of the electric energy meter slaves to be identified, the number of the identified electric energy meter slaves, the current time and date, and the like. The model of the electric energy meter slave, the current position of the electric energy meter slave, the unique code of the electric energy meter slave, the online state of the electric energy meter slave, the device state of the electric energy meter slave, and the state of the relay, and the like can also be displayed. For example, in the second layer interface, the display module 130 can display the working information of various communications, and the like.

[0066] In this way, by setting one key S1, various display functions can be realized, so that the volume of the master of the electric energy meter is reduced. And by setting the display module 130 to include the dot matrix liquid crystal display screen, the display module 130 can display more information and has higher resolution, and better display information is realized.

[0067] The technical scheme of the embodiment, by setting the first key module to include one key, the number of keys is reduced, and the volume of the master of the electric energy meter can be reduced. And the display module includes the dot matrix liquid crystal display screen, compared with the commonly used segment code liquid crystal display screen, more information can be displayed, and the resolution is higher, and better display information is realized.

[0068] On the basis of the above technical scheme, Figure 2 is another circuit structure schematic diagram of the master of the electric energy meter provided by the embodiment of the utility model, and optionally, referring to Figure 2 The first key module 120 further includes a first resistor R1, a second resistor R2 and a first capacitor C1.

[0069] The first end of the key S1 is connected to the first power supply voltage VDD through the second resistor R2, and the second end of the key S1 is connected to the second power supply voltage;

[0070] The first resistor R1 is connected between the first end of the key S1 and the first end of the first capacitor C1, and the second end of the first capacitor C1 is connected to the second power supply voltage;

[0071] The first end of the first capacitor C1 is connected to the processing module 110.

[0072] The first power supply voltage VDD can be 3.3V. In other embodiments, the first power supply voltage can also be 5V or other voltages.

[0073] Specifically, the second resistor R2 can perform voltage division and current limiting to avoid damage to the key S1 caused by a large first power supply voltage VDD. The first resistor R1 and the first capacitor C1 can form a first-order filter circuit, which can filter high-frequency interference signals, so that the key signal sent to the processing module 110 is more accurate, thereby improving the accuracy and reliability of the electric energy meter host.

[0074] Optionally, the processing module 110 can collect n (an integer greater than 1) times of key signals each time. If the levels of the n times of sampling are consistent, and it is determined that the current collected level is the level of the key signal. If only one of the n times of sampling is inconsistent, the level of the last sampling is taken as the level of the key signal. In this way, interference can be further eliminated, and the accuracy of the key signal obtained by the processing module 110 can be further improved.

[0075] On the basis of the above technical solutions, optionally, Figure 2 The display module 130 includes a plurality of light emitting diodes D0, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, and a third transistor Q3. The first end of the light emitting diode D0 is connected to the first power supply voltage VDD through the fourteenth resistor R14, the second end of the light emitting diode D0 is connected to the first end of the third transistor Q3, the second end of the third transistor Q3 is connected to the second power supply voltage, the control end of the third transistor Q3 is connected to the second power supply voltage through the sixteenth resistor R16, and the control end of the third transistor Q3 is connected to the processing module 110 through the fifteenth resistor R15.

[0076] The light emitting diode DO can be in a constant-on mode or a constant-off mode. When the light emitting diode DO is in the constant-on mode, the processing module 110 can send a pulse width modulation signal to the third transistor Q3 to control the conduction and non-conduction of the third transistor Q3, thereby controlling the light emitting brightness of the light emitting diode DO. The brightness of different light emitting diodes DO can be different or the same, so that the display module 130 displays interface information. When the light emitting diode DO is in the constant-off mode, the processing module 110 can send a high level or a low level to the third transistor Q3. When the third transistor Q3 receives the high level, the third transistor Q3 is turned on, so that the light emitting diode DO emits light. When the third transistor Q3 receives the low level, the third transistor Q3 is turned off, so that the light emitting diode DO does not emit light. In this way, the conduction state of each light emitting diode DO can be controlled, and the display module 130 displays corresponding interface information.

[0077] Specifically, when the third transistor Q3 is turned on, the light emitting diode DO has a current flowing through it, and the light emitting diode DO emits light. The third transistor Q3 can amplify the small current signal output by the processing module 110 to a larger current that makes the light emitting diode DO emit light, thereby ensuring that the light emitting diode DO emits light normally. The fifteenth resistor R15 can limit the current at the control end of the third transistor Q3. The sixteenth resistor R16 can ensure that the control end of the third transistor Q3 is at a certain level when the processing module 110 does not give a certain level. The fourteenth resistor R14 can perform voltage division and current limiting to avoid damaging the light emitting diode DO.

[0078] On the basis of the above technical solutions, Figure 3 is another circuit structure schematic diagram of an electric energy meter host provided by the embodiment of the utility model, and optionally, with reference to Figure 3 The electric energy meter host further includes a first communication module 140 and a second communication module 150.

[0079] The first communication module 140 is connected with the processing module 110, and the processing module 110 is configured to communicate with a server or an upper computer through the first communication module 140.

[0080] The second communication module 150 is connected with the processing module 110, and the processing module 110 is configured to communicate with an electric energy meter slave through the second communication module 150.

[0081] Specifically, the first communication module 140 and the second communication module 150 can be wired communication modules. By arranging the first communication module 140, the electric energy meter host is facilitated to communicate with a server or an upper computer, can respond to signals of the server or the upper computer, send data of power parameters to the server or the upper computer, and also can acquire upgrade information or other information from the server or the upper computer. By arranging the second communication module 150, the electric energy meter host is facilitated to communicate with electric energy meter slaves, and acquire data of power parameters collected by the electric energy meter slaves. Moreover, through the second communication module 150, the types and serial numbers of the electric energy meter slaves can be identified, the electric energy meter slaves can be allocated addresses, each electric energy meter slave can be identified, and the output of the relay of the electric energy meter slave can be controlled.

[0082] For example, the sending end of the second communication module 150 is connected with the first receiving end M_RXD1 of the processing module 110, and the receiving end of the second communication module 150 is connected with the first sending end M_TXD1 of the processing module 110. Similarly, the first communication module 140 is connected with the processing module 110 in the same way, and details are not repeated here.

[0083] On the basis of the above technical scheme, Figure 4 is a circuit structure schematic diagram of the second communication module provided by the embodiment of the utility model, and optionally, referring to Figure 4 The second communication module 150 comprises a first communication chip 151, a third resistor R3 and a fourth resistor R4.

[0084] The power supply end of the first communication chip 151 is connected with the third power supply voltage VCC.

[0085] The first communication end TA and the second communication end TB of the first communication chip 151 are connected with the electric energy meter slave respectively.

[0086] The first end of the third resistor R3 is connected with the sending end of the first communication chip 151, and the second end of the third resistor R3 is connected with the first receiving end M_RXD1 of the processing module 110.

[0087] The first end of the fourth resistor R4 is connected with the second end of the third resistor R3, and the second end of the fourth resistor R4 is connected with the second power supply voltage.

[0088] The input data end of the first communication chip 151 is connected with the first sending end M_TXD1 of the processing module 110.

[0089] The first communication chip 151 can be an RS485 communication chip, or an RS232 communication chip or other communication chip, and the embodiment is not limited. The third power supply voltage VCC can be 5V.

[0090] Specifically, the first communication chip 151 is connected with the slave electric energy meter through the first communication terminal TA and the second communication terminal TB, respectively, and can communicate with the slave electric energy meter and receive data of the slave electric energy meter. When the receiving terminal of the first communication chip 151 is at a high level, the voltage is 5V, and the voltage of the first receiving terminal M_RXD of the processing module 110 is reduced through the voltage division of the third resistor R3 and the fourth resistor R4, for example, from 5V to 3.3V, so that the potential conversion is realized, and the processing module 110 can receive the data of the slave electric energy meter through the first communication chip 151. The input data terminal of the first communication chip 151 can receive the data sent by the processing module 110. In this way, the master electric energy meter can communicate with the slave electric energy meter through the first communication chip 151.

[0091] Optionally, the second communication module 150 further includes a communication interface J1, a first end S_Out of the communication interface J1 is configured to transfer the key during automatic device identification, that is, the processing module 110 of the master electric energy meter can broadcast the key signal through the first end S_Out of the communication interface J1, only the slave electric energy meter that obtains the key can communicate with the master electric energy meter, after the device identification is completed, the slave electric energy meter will transfer the key to the next slave electric energy meter until no device responds to the master electric energy meter, all slave electric energy meters are identified and the address allocation is completed, that is, the address allocation of the slave electric energy meter is completed, so as to identify each slave electric energy meter. The second end of the communication interface J1 is connected with the first communication terminal TA of the first communication chip 151, and the third end of the communication interface J1 is connected with the second communication terminal TB of the first communication chip 151, so as to connect the slave electric energy meter through the communication interface J1 by the first communication chip 151. The fourth end of the communication interface J1 is connected with the fifth power supply voltage V5, and the fifth end and the sixth end of the communication interface J1 are grounded GND, so as to supply power for the slave electric energy meter. For example, the fifth power supply voltage V5 is 12V.

[0092] It should be noted that the first communication module 140 can also include a communication chip and its peripheral circuit, for example, including an RS485 communication chip and its peripheral circuit, that is, the circuit result of the first communication module 140 is similar to the circuit structure of the second communication module 150, which will not be described here.

[0093] On the basis of the above technical solutions, optionally, with reference to Figure 3 The master electric energy meter further includes a third communication module 160 and a first power supply module 170.

[0094] The enable end of the first power supply module 170 is connected with the processing module 110.

[0095] The communication end of the third communication module 160 is connected with the processing module 110, and the power supply end of the third communication module 160 is connected with the first power supply module 170. The first power supply module 170 is configured to supply power to the third communication module 160 in response to the first enable signal of the processing module 110. The third communication module 160 is configured to communicate with the processing module 110 after being powered on.

[0096] The communication end of the third communication module 160 can include a sending end and a receiving end. The sending end of the third communication module 160 is connected with the second receiving end M_RXD2 of the processing module 110, and the receiving end of the third communication module 160 is connected with the second sending end M_TXD2 of the processing module 110.

[0097] Specifically, the first power supply module 170 can perform voltage conversion, for example, include a direct current conversion circuit, that is, a DC-DC circuit, and can also include a voltage stabilizing circuit. The first power supply module 170 can convert a larger power supply voltage into a voltage for supplying power to the third communication module 160. The first power supply module 170 can be connected with the first power supply enable end Power1 of the processing module 110. After the first power supply module 170 receives the first enable signal output by the first power supply enable end Power1 of the processing module 110, the first power supply module 170 starts to work and supplies power to the third communication module 160, so that the third communication module 160 communicates with the processing module 110 after being powered on. Thus, the electric energy meter host can communicate with other devices through the third communication module 160. The third communication module 160 can be a wireless communication module, for example, a 4G, 5G or WiFi communication module. In this way, the electric energy meter host can realize wired communication through the first communication module 140 and the second communication module 150, and realize wireless communication through the third communication module 160, thereby realizing multiple communication modes and improving user experience.

[0098] Optionally, referring to Figure 3 The electric energy meter host further includes a fourth communication module 180 and a first switch module 190.

[0099] The communication end of the fourth communication module 180 is connected with the processing module 110, and the first switch module 190 is connected between the power supply end of the fourth communication module 180 and the processing module. The enable end of the first switch module 190 is connected with the processing module 110. The fourth communication module 180 is configured to communicate with the processing module 110 when the first switch module 190 is turned on in response to the second enable signal of the processing module 110.

[0100] The fourth communication module 180 can be a wireless communication module, for example, an Ethernet communication module, so that the processing module 110 can communicate with a gateway server through the fourth communication module 180.

[0101] Specifically, the enable end of the first switch module 190 is connected with the second power supply enable end Power2 of the processing module 110. When the first switch module 190 does not receive the second enable signal, the first switch module 190 is turned off, the fourth communication module 180 is not powered, and the fourth communication module 180 does not communicate with the processing module 110. When the first switch module 190 receives the second enable signal, the fourth communication module 180 is powered and works, so that the fourth communication module 180 communicates with the processing module 110, and then the processing module 110 can communicate with other devices through the fourth communication module 180.

[0102] Optionally, referring to Figure 3 , the electric energy meter host further comprises a fifth communication module 210 and a second switch module 220;

[0103] The communication end of the fifth communication module 210 is connected with the processing module 110, the second switch module 220 is connected between the power supply end of the fifth communication module 210 and the processing module 110, the enable end of the second switch module 220 is connected with the processing module 110, and the fifth communication module 210 is configured to communicate with the processing module 110 when the second switch module 220 is turned on in response to the third enable signal of the processing module 110.

[0104] Optionally, the fifth communication module 210 can be a wireless communication module, for example, a Bluetooth communication module, and the fifth communication module 210 can comprise a Bluetooth communication chip and a peripheral circuit thereof, so that the electric energy meter host can perform Bluetooth communication through the fifth communication module 210, for example, can perform Bluetooth communication with a mobile device.

[0105] Specifically, when the second switch module 220 does not receive the second enable signal, the second switch module 220 is turned off, the fifth communication module 210 is not powered, and the fifth communication module 210 does not communicate with the processing module 110. When the second switch module 220 receives the second enable signal, the fifth communication module 210 is powered and works, so that the fifth communication module 210 communicates with the processing module 110, and then the processing module 110 can communicate with other devices through the fifth communication module 210.

[0106] On the basis of the above technical solutions, Figure 5 is a circuit structure schematic diagram of the first power supply module provided by the embodiment of the utility model, and optionally, referring to Figure 5 , the first power supply module 170 comprises a direct-current voltage conversion chip 171 and a peripheral circuit thereof, the enable end of the direct-current conversion chip 171 is connected with the first power supply enable end of the processing module 110, and the output end V_BAT of the direct-current conversion chip 171 is connected with the power supply end of the third communication module 160. Optionally, the direct-current conversion chip 171 can be a linear voltage stabilizing chip or a DC-DC chip, and the embodiment is not limited in this regard.

[0107] On the basis of the above technical solutions, Figure 6 is a circuit structure schematic diagram of the third communication module, and optionally, with reference to Figure 6 The third communication module 160 comprises a second communication chip 161, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first transistor Q1, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a second transistor Q2.

[0108] The power supply end of the second communication chip 161 is connected with the output end V_BAT of the first power module 170, the receiving end of the second communication chip 161 is connected with the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is connected with the fourth power supply voltage VDD_EXT.

[0109] The first end of the first transistor Q1 is connected with the first end of the fifth resistor R5, the second end of the first transistor Q1 is connected with the second sending end M_TXD2 of the processing module 110 through the sixth resistor R6, and the control end of the first transistor Q1 is connected with the first power supply voltage VDD through the seventh resistor R7; and the power supply end of the processing module 110 is connected with the first power supply voltage VDD.

[0110] The control end of the second transistor Q2 is connected with the fourth power supply voltage VDD_EXT through the eighth resistor R8, the first end of the second transistor Q2 is connected with the second receiving end M_RXD2 of the processing module 110 through the ninth resistor R9, the first end of the second transistor Q2 is connected with the first power supply voltage VDD through the tenth resistor R10, and the second end of the second transistor Q2 is connected with the sending end of the second communication chip 161.

[0111] The power supply end of the processing module 110 is connected with the first power supply voltage VDD, and the voltage of the high level sent by the processing module 110 is the first power supply voltage VDD.

[0112] Specifically, when the second sending end M_TXD2 of the processing module 110 sends a high level, the second end of the first transistor Q1 is a high level, there is no voltage difference between the control end and the first end of the first transistor Q1, and the first transistor Q1 is not turned on. The receiving end of the second communication chip 161 is pulled up to a high level, that is, the fourth power supply voltage VDD_EXD, so as to realize the conversion of the voltage of the level. When the second sending end M_TXD2 of the processing module 110 sends a low level, the first transistor Q1 is turned on, and the receiving end of the second communication chip 161 is pulled down to a low level. In this way, the high and low of the level of the receiving end of the second communication chip 161 is consistent with the high and low of the level of the second sending end M_TXD2 of the processing module 110, the transmission of the level is realized, and the voltage of the level is converted, meeting the needs of the second communication chip 161, and better communication is realized. When the sending end of the second communication chip 161 outputs a high level, the second end of the second transistor Q2 is a high level, the second transistor Q2 is not turned on, and the second receiving end M_RXD2 of the processing module 110 is pulled up to the first power supply voltage VDD by the tenth resistor R10, realizing the conversion of the voltage of the level. When the sending end of the second communication chip 161 outputs a low level, the second transistor Q2 is turned on, and the second receiving end M_RXD2 of the processing module 110 is pulled down to a low level. In this way, the high and low of the level of the receiving end of the second communication chip 161 is consistent with the high and low of the level of the second receiving end M_RXD2 of the processing module 110, the transmission of the level is realized, and the voltage of the level is converted, meeting the needs of the processing module 110, and better communication is realized.

[0113] On the basis of the above technical solutions, Figure 7 is a fourth communication module and a circuit structure schematic diagram of the first switch module provided by the embodiment of the utility model, and optionally, with reference to Figure 7 , the fourth communication module 180 comprises a third communication chip 181, an eleventh resistor R11 and a twelfth resistor R12;

[0114] The power supply end of the third communication chip 181 is connected with the first switch module 190, the first differential sending end T_XP of the third communication chip 181 is connected with the processing module 110 through the eleventh resistor R11, and the second differential sending end T_XN of the third communication chip 181 is connected with the processing module 110 through the twelfth resistor R12;

[0115] The fourth communication module 180 further comprises a crystal chip 182 and a thirteenth resistor R13;

[0116] The first end of the crystal chip 182 is connected with the third communication chip 181, and the second end of the crystal chip 182 is connected with the third communication chip 181 through the thirteenth resistor R13.

[0117] Specifically, the third communication chip 181 is an Ethernet chip. By setting the eleventh resistor R11 and the twelfth resistor R12, the signal strength on the transmission differential line of the third communication chip 181 can be reduced, avoiding damage to the processing module 110. By setting the thirteenth resistor R13, the amplitude of the signal output by the crystal oscillator chip 182 can be reduced, avoiding greater interference to the third communication chip 181.

[0118] Optionally, referring to Figure 7 , the fourth communication module 180 further includes a seventeenth resistor R17 and an eighteenth resistor R18; the first differential receiving end R_XP of the third communication chip 181 is connected to the processing module 110 through the seventeenth resistor R17, and the second differential receiving end R_XN of the third communication chip 181 is connected to the processing module 110 through the eighteenth resistor R18. In this way, the signal strength on the receiving differential line of the third communication chip 181 can be reduced. Optionally, the resistance value of the eleventh resistor R11 and the resistance value of the twelfth resistor R12 are greater than the resistance value of the seventeenth resistor R17, and the resistance value of the eleventh resistor R11 and the resistance value of the twelfth resistor R12 are greater than the resistance value of the eighteenth resistor R18.

[0119] For example, as shown in Figure 7 , the first differential transmission end T_XP of the third communication chip 181 is connected to the first differential transmission end T_XP of the processing module 110 through the eleventh resistor R11, and the second differential transmission end T_XN of the third communication chip 181 is connected to the second differential transmission end T_XN of the processing module 110 through the twelfth resistor R12; the first differential receiving end R_XP of the third communication chip 181 is connected to the first differential receiving end R_XP of the processing module 110 through the seventeenth resistor R17, and the second differential receiving end R_XN of the third communication chip 181 is connected to the second differential receiving end R_XN of the processing module 110 through the eighteenth resistor R18.

[0120] Optionally, referring to Figure 7The first switch module 190 comprises a fourth transistor Q4, a nineteenth resistor R19 and a twentieth resistor R20. The control end of the fourth transistor Q4 is connected with the second power supply enable end Power2 of the processing module 110 through the nineteenth resistor R19, the first end of the fourth transistor Q4 is connected with the first power supply voltage VDD, the control end of the fourth transistor Q4 is connected with the first power supply voltage VDD through the twentieth resistor R20, and the second end of the fourth transistor Q4 is connected with the third communication chip 181. When the second power supply enable end Power2 of the processing module 110 outputs a high level, the fourth transistor Q4 is not conductive, and when the second power supply enable end Power2 of the processing module 110 outputs a low level, the fourth transistor Q4 is conductive. The first power supply voltage VDD is output to the third communication chip 181 for power supply. The twentieth resistor R20 is used to make the drain of the fourth transistor Q4 have a high level when the second power supply enable end Power2 of the processing module 110 has no determined level when the processing module 110 is powered on. By controlling the level of the second power supply enable end Power2, the effect of controlling whether the third communication chip 181 is powered on or not is achieved.

[0121] In addition, the circuit structure of the second switch module 220 is the same as that of the first switch module 190, and details are not repeated here.

[0122] Optionally, referring to Figure 3 The electric energy meter host further comprises a first storage module 230 and a second storage module 240.

[0123] The first storage module 230 is connected with the processing module 110, and the first storage module 230 is configured to store electric energy data of the electric energy meter slave.

[0124] The second storage module 240 is connected with the processing module 110, and the second storage module 240 is configured to store event records of the electric energy meter host and the electric energy meter slave, and store upgrade information.

[0125] Specifically, by setting the first storage module 230, each electric energy meter slave will be allocated a piece of space in the first storage module 230. Each piece of space includes a unique code of the electric energy meter slave and other data to be saved. The serial number of each piece of storage space and the position of the electric energy meter slave to be identified do not have a sequential correspondence. Instead, after identifying the electric energy meter slave, it is checked from the storage space whether there is an idle storage piece, and if so, this piece of space is allocated to the corresponding electric energy meter slave. In this way, the position of the electric energy meter slave is changed, and the electric energy meter slave is replaced, and the storage space can be correctly found. If all the storage spaces are fully allocated, when a new unique code device is needed for storage allocation, it is necessary to check from all the storage spaces whether the unique code of each storage space corresponds to the unique code of the electric energy meter slave that has been identified, indicating that the position is no longer useful and can be used to allocate a new unique code electric energy meter slave. Through such dynamic storage allocation, the electric energy meter slave in the network can be allocated to the storage space under various conditions of the electric energy meter master. By setting the second storage module 240, the event records of the electric energy meter master and the electric energy meter slave can be stored.

[0126] Optionally, the first storage module 230 includes a ferroelectric memory; and the second storage module 240 includes a flash memory, i.e., a flash memory.

[0127] Illustratively, the flash memory includes a flash chip and its peripheral circuit. The flash chip can be a 128 MB flash memory chip, or other capacity flash memory chip, and the present embodiment is not limited. The flash chip has a characteristic that it needs to be deleted before data can be written, and the minimum space for deletion is 4k bytes. The flash chip is partitioned: the recharge records of each electric energy meter slave, the recharge records of each electric energy meter slave are 2000, and each record is 16 bytes long. The size of the recharge records of each electric energy meter slave is 32k space, and 54 electric energy meter slaves need a total of 1.6875M bytes of data. The internal space of the processing module 110 is 512kB. A 512kB area is allocated in the external flash for online upgrade. Through the RS485 interface, the Bluetooth interface, the 4G interface, and the Ethernet interface, online upgrade can be supported, and the process is as follows:

[0128] Step 1: The system platform issues a program upgrade request frame: including the total byte size of the program, the program checksum, the program package quantity, and the program version. The electric energy meter master records the upgrade mode, and the subsequent upgrade related data frame and end frame. If the frame is not from the same communication mode, it is directly discarded.

[0129] Step 2: After receiving the frame, the electric energy meter host judges whether the program version is consistent with the current running program version. If yes, the upgrade is exited, the consistent program version result is fed back to the system platform, and the process is ended. Otherwise, the success result is sent to the system platform, and step 3 is continued.

[0130] Step 3: The system platform starts to send each program package in turn. Each program package contains cyclic redundancy check (CRC), total package number, current package number, and program content to be upgraded. After receiving the program package, the electric energy meter host analyzes the program package and performs CRC check. If the check is incorrect, a CRC error reply frame is returned to the system platform, and the process is exited. If the check is correct, the storage position in the Flash is calculated according to the current package number and the program length of each package, and is written into the Flash. Then, it is read out from the Flash and checked whether it is consistent with the CRC in the sent package. If not, a Flash storage error reply frame is sent to the system platform, and the process is exited. If yes, a success reply frame is sent to the system platform. Step 3 is continued until all the program packages are sent.

[0131] Step 4: The system platform sends an end package to the electric energy meter host, including an end identifier. After receiving the end package, the electric energy meter host sends a success frame to the system platform.

[0132] Step 5: A design upgrade start flag is set to 1, and the program size and program package number information are placed in the storage. Then, the program is reset.

[0133] Step 6: The program starts to execute from the boot program, reads the upgrade flag in the Flash storage as 1, reads the program size and program package number, and then executes the upgrade program: the program in the external Flash is copied and written into the internal storage space. After all the programs are written, a jump instruction is executed to jump from the boot program to the software program to run the program, and the upgrade of the program is completed.

[0134] Optionally, referring to Figure 3 The electric energy meter host further includes a second power module 250 connected with the first power module 170. The second power module 250 is configured to provide an input voltage to the first power module 170.

[0135] The electric energy meter host further includes a debugging output interface 260.

[0136] The debugging output interface 260 is connected with the processing module 110. The debugging output interface 260 is configured to output the running information of the electric energy meter host.

[0137] Specifically, the second power module 250 includes an AC-DC circuit, which can convert AC power into DC power, for example, into a third power voltage VCC, which can provide an input voltage for the first power module 170 and can also power the first communication module 140 and the second communication module 150. By setting the debugging output interface 260, the running information of the electric energy meter host, i.e., the information in the running process, can be output, which facilitates problem analysis and data flow observation, and at the same time, serial port information input is received.

[0138] Optionally, with reference to Figure 3 , the electric energy meter host further includes a clock module 270 connected with the processing module 110; the clock module 270 includes a clock circuit, and the clock module 270 can generate a real-time clock signal to provide real-time time for the processing module 110.

[0139] Next, the screen displayed by the display module 130 will be further described according to the above-mentioned modules included in the electric energy meter host, but this is not a limitation on the present application.

[0140] For example, in the first layer interface, the display module 130 can display the brief information of the electric energy meter host and the electric energy meter slave, and in the second layer interface, the display module 130 can display the detailed information of the electric energy meter host and the electric energy meter slave.

[0141] For example, in the first layer interface, the display module 130 can display the number of electric energy meter slaves to be identified and the number of electric energy meter slaves that have been identified, as well as the current time and date, etc. It can also display the model of the electric energy meter slave, the current location of the electric energy meter slave, the unique code of the electric energy meter slave, the online state of the electric energy meter slave, the device state of the electric energy meter slave, and the state of the relay, etc.

[0142] For example, in the second layer interface, the display module 130 can display various communication working information, etc. That is, the information interface of the first communication module 140, the information interface of the second communication module 150, the information interface of the third communication module 160, the information interface of the fourth communication module 180, the information interface of the fifth communication module 210, the system information interface, and the brief information interface of the electric energy meter slave.

[0143] For example, the third communication module 160 is a 4G module. The second layer interface of the display module 130 can display a 4G information interface, which can display whether the 4G function is enabled, whether the connection mode is a domain name mode or an IP mode, the connected domain name and IP address, the connected port display, and the state of the 4G function connection, which can include connection in progress or connection success, etc.

[0144] For example, the fourth communication module 180 is an Ethernet communication module. The second-layer interface of the display module 130 can display the Ethernet connection interface. The Ethernet connection interface can display: whether the current communication protocol is the standard server mode or the custom client mode; whether dynamic routing is enabled or disabled; the port of the server mode or the port of the remote server in the custom mode; the local IP address in server mode, or the IP address or domain name of the remote server in client mode; the IP address of the Ethernet network card; data of successful remote client connections in server mode (up to 3 clients can connect), and the connection status; in client mode, the connection count is 1; "Connecting" indicates that there are still unconnected clients in server mode; "Connected successfully" indicates that three clients are connected in server mode. If in client mode, "Connecting" indicates that the host has not yet connected to the remote server, and "Connected successfully" indicates that the host has connected to the remote server.

[0145] For example, the first communication module 140 and the second communication module 150 are RS485 communication modules. The second-level interface of the display module 130 can display the serial port connection interface. The serial port connection interface can display the serial port information of the first communication module 140, which may include the communication address, baud rate, data bits, parity bits, and stop bits.

[0146] The second-layer interface of the display module 130 can display system information, such as: the software version of the electricity meter host, the address of the Ethernet network card, the signal quality of the 4G communication module, the card number of the 4G communication module, and the International Mobile Equipment Identity (IMEI) of the 4G communication module.

[0147] The second layer interface of the display module 130 can display module interface information, such as information about each identified module, including: identification serial number, unique code of the energy meter slave, online status and model of the energy meter slave. If the energy meter slave needs to display a lot of information, it can be displayed on multiple interfaces.

[0148] The second-layer interface of the display module 130 can display detailed information about the slave electricity meter, including the slave electricity consumption, electricity purchase, real-time electricity data, electricity statistics, and electricity purchase records. The electricity purchase information can display the most recent 30 records, for a total of 10 screens of data. If there are fewer than 30 records, only the interface with data will be displayed.

[0149] The interface of the slave unit of the electricity meter may include a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface.

[0150] The first interface displays: the unique code of the slave meter, the relay state, the total power consumption, the total power purchase, the power at the time of opening an account, the overdraft power and the module state. The module state includes: power cut for arrears, normal and power purchase state.

[0151] The second interface displays: the power purchase times, the remaining power, the overdraft power and the basic power remaining.

[0152] The third interface displays: the real-time power information of the slave meter, mainly including voltage, current, active power, reactive power, apparent power and power factor.

[0153] The fourth interface displays: the statistical power information of the slave meter, mainly including forward active power, reverse active power and reactive power in four quadrants.

[0154] The fifth interface displays: the total active power, the total reactive power, the frequency and the relay state.

[0155] The sixth interface displays the recharge record, for example, including the charging time and the charging power.

[0156] In this way, the master meter can display the layered interface and display more information, which simplifies the reading interface and is beneficial to improve the user experience.

[0157] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A main unit for an electricity meter, characterized in that, include: Processing module, first button module, and display module; The first button module includes one button; the display module includes a dot-matrix liquid crystal display screen. The first button module is connected to the processing module, and the display module is connected to the processing module. The processing module is configured to send a display signal to the display module based on the level of the button signal of the first button module and the duration of the effective level in the button signal.

2. The main unit of the electricity meter according to claim 1, characterized in that, The first button module includes: a first resistor, a second resistor, and a first capacitor; The first end of the button is connected to the first power supply voltage through the second resistor, and the second end of the button is connected to the second power supply voltage. The first resistor is connected between the first end of the button and the first end of the first capacitor, and the second end of the first capacitor is connected to the second power supply voltage. The first terminal of the first capacitor is connected to the processing module.

3. The main unit of the electricity meter according to claim 1, characterized in that, The main unit of the electricity meter also includes a first communication module and a second communication module; The first communication module is connected to the processing module, and the processing module is configured to communicate with a server or host computer through the first communication module. The second communication module is connected to the processing module, and the processing module is configured to communicate with the slave unit of the energy meter through the second communication module.

4. The main unit of the energy meter according to claim 3, characterized in that, The second communication module includes a first communication chip, a third resistor, and a fourth resistor; The power supply terminal of the first communication chip is connected to a third power supply voltage; The first communication terminal and the second communication terminal of the first communication chip are respectively connected to the slave unit of the energy meter. The first end of the third resistor is connected to the transmitting end of the first communication chip, and the second end of the third resistor is connected to the first receiving end of the processing module. The first end of the fourth resistor is connected to the second end of the third resistor, and the second end of the fourth resistor is connected to the second power supply voltage; The input data terminal of the first communication chip is connected to the first transmitting terminal of the processing module.

5. The main unit of the electricity meter according to claim 1, characterized in that, The main unit of the electricity meter also includes a third communication module and a first power supply module; The enable terminal of the first power module is connected to the processing module; The communication terminal of the third communication module is connected to the processing module, and the power supply terminal of the third communication module is connected to the first power supply module. The first power supply module is configured to supply power to the third communication module in response to the first enable signal of the processing module. The third communication module is configured to communicate with the processing module after being powered on. The main unit of the energy meter also includes a fourth communication module and a first switch module; The communication terminal of the fourth communication module is connected to the processing module. The first switch module is connected between the power supply terminal of the fourth communication module and the processing module. The enable terminal of the first switch module is connected to the processing module. The fourth communication module is configured to communicate with the processing module when the first switch module responds to the second enable signal of the processing module. The main unit of the electricity meter also includes a fifth communication module and a second switch module; The communication terminal of the fifth communication module is connected to the processing module. The second switch module is connected between the power supply terminal of the fifth communication module and the processing module. The enable terminal of the second switch module is connected to the processing module. The fifth communication module is configured to communicate with the processing module when the second switch module responds to the third enable signal of the processing module.

6. The main unit of the electricity meter according to claim 5, characterized in that, The third communication module includes a second communication chip, a fifth resistor, a sixth resistor, a seventh resistor, a first transistor, an eighth resistor, a ninth resistor, a tenth resistor, and a second transistor; The power supply terminal of the second communication chip is connected to the output terminal of the first power module, the receiving terminal of the second communication chip is connected to the first terminal of the fifth resistor, and the second terminal of the fifth resistor is connected to the fourth power supply voltage. The first terminal of the first transistor is connected to the first terminal of the fifth resistor, the second terminal of the first transistor is connected to the second transmitting terminal of the processing module through the sixth resistor, the control terminal of the first transistor is connected to the first power supply voltage through the seventh resistor, and the power supply terminal of the processing module is connected to the first power supply voltage. The control terminal of the second transistor is connected to the fourth power supply voltage through the eighth resistor, the first terminal of the second transistor is connected to the second receiving terminal of the processing module through the ninth resistor, the first terminal of the second transistor is connected to the first power supply voltage through the tenth resistor, and the second terminal of the second transistor is connected to the transmitting terminal of the second communication chip.

7. The main unit of the electricity meter according to claim 5, characterized in that, The fourth communication module includes a third communication chip, an eleventh resistor, and a twelfth resistor; The power supply terminal of the third communication chip is connected to the first switch module, the first differential transmitter of the third communication chip is connected to the processing module through the eleventh resistor, and the second differential transmitter of the third communication chip is connected to the processing module through the twelfth resistor. The fourth communication module also includes a crystal oscillator chip and a thirteenth resistor; The first end of the crystal oscillator chip is connected to the third communication chip, and the second end of the crystal oscillator chip is connected to the third communication chip through the thirteenth resistor.

8. The main unit of the electricity meter according to claim 1, characterized in that, The main unit of the electricity meter also includes a first storage module and a second storage module; The first storage module is connected to the processing module, and the first storage module is configured to store the power data of the power meter slave device; The second storage module is connected to the processing module. The second storage module is configured to store event records of the electricity meter master and the electricity meter slave, and to store upgrade information.

9. The main unit of the energy meter according to claim 8, characterized in that, The first storage module includes a ferroelectric memory; the second storage module includes a flash memory.

10. The main unit of the electricity meter according to claim 5, characterized in that, The main unit of the electricity meter also includes a second power module, which is connected to the first power module and is configured to provide input voltage to the first power module. The main unit of the energy meter also includes a debugging output interface; The debugging output interface is connected to the processing module, and the debugging output interface is configured to output the operating information of the electricity meter host.

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