CN106843007B - Modular power meter and addressing method thereof - Google Patents

Abstract

The invention discloses a modular electric power instrument and an addressing method thereof. The modular electric power instrument comprises an instrument shell (8) and a plurality of expansion modules (9), wherein each expansion module (9) comprises a module body (1); a buckle (3) is arranged at the front end of one side of each module body (1); a clamping groove (2) is formed in the rear end of one side of each module body (1); when the module bodies (1) are overlapped and cascaded, the buckle (3) of the later-stage module body (1) is inserted into the clamping groove (2) of the previous-stage module body (1); an expansion circuit module is arranged in each expansion module (9); a main circuit module is arranged in the instrument shell (8); and the expansion circuit modules and the main circuit module are connected in a plugging fit manner. According to the modular electric power instrument and the addressing method thereof, expansion is convenient, and each expansion module can be automatically encoded.

Description

A Modular Power Meter and Its Addressing Method

technical field

The invention relates to an electric power meter, in particular to a power meter with modularized function expansion and an addressing method of the power meter, belonging to the technical field of electric power instruments.

Background technique

At present, there are many ways to expand the functions of power meters. For example, according to the needs of customers, the manufacturer directly installs the functions in the meters. The module is externally connected to the back of the instrument. This method has the problem that the number of modules is limited due to the unreasonable connection method. At the same time, due to the complex structure, it needs to be fixed by screws, which brings inconvenience to the user in the selection of instrument functions and the installation of the instrument; In addition, the conventional expansion method requires manual addressing of each functional module after function expansion, resulting in limited use, and untrained operators cannot directly and quickly expand the instrument function according to the needs of the enterprise.

Contents of the invention

The object of the present invention is to overcome the above-mentioned shortcomings, and provide a modular electric meter and its addressing method which are convenient to expand and can automatically encode each expansion module.

The purpose of the present invention is achieved like this:

A modularized power meter, the modularized power meter includes a meter housing and a plurality of expansion modules, the expansion modules include a module body, one side of the module body is provided with a buckle at the front end and a card at the rear end slot, and when the module bodies are superimposed and cascaded, the buckle of the latter module body is inserted into the card slot of the previous module body, and each expansion module is equipped with an expansion circuit module, and the main circuit module is installed in the instrument case , the expansion circuit module and the main circuit module are connected through plug-fitting.

The invention is a modular electric meter, the front end device on the other side of the module body has a push-type self-locking structure, and the rear end is provided with an inverted groove, and the push-type self-locking structure includes a and the end of the pressing plate is provided with a barb. When the module bodies are stacked and cascaded, the barbs of the module body of the next stage are buckled into the inverted groove of the module body of the previous stage; one side of the instrument housing is provided with The housing card slot, the other side is provided with a housing inverted slot, the buckle of the module body at the front end is inserted into the housing card slot of the instrument housing, and the barb of the module body at the front end is buckled into the barb of the instrument housing In the housing pour tank.

The present invention is a modular electric meter, the expansion circuit module includes a processor and an interface 1 and an interface 2 connected with the processor, the interface 2 of the expansion circuit module located in the expansion module of the previous stage is connected to the interface 2 of the expansion circuit module located in the previous stage The interface one of the expansion circuit module in the expansion module of the first level is plugged and matched; the main circuit module includes the main processor and the interface two connected with the main processor, and the interface two on the main circuit module in the instrument housing It is plugged and matched with the interface of the expansion circuit module located in the front-end expansion module.

An addressing method for a modular power meter, the main processor in the meter housing and the processor of the expansion module both store two address information, wherein the number stored in the first address information represents the functional category of the expansion circuit module, and the second The number stored in the second address information represents the number of functions that the expansion circuit module has before the expansion circuit module;

After receiving the message information sent by the previous expansion module, the subsequent expansion module first extracts the first address information in the message information, and compares the first address information with the first address information bit in the expansion module processor ;

If there is the same first address information as this expansion module in the message information of the previous level, then the second address information corresponding to the first address information in the message information of the previous level + 1, and the + Write the second address information after 1 into the second address information of the expansion module, and send the modified first address information and second address information to the subsequent expansion module in the form of a message;

If the message information of the previous level does not have the same first address information as this expansion module, set the number in the second address information of this expansion module to 0, and set the same first address information and After the second address information is added to the message, it is sent to the next-level expansion module.

Compared with prior art, the beneficial effect of the present invention is:

The present invention connects the expansion modules on the front, without being limited by the site; and through the plug-in cooperation of the card slot and the buckle, and the push-type self-locking structure, the whole cascading process is convenient and fast; and it is realized by the way of automatic addressing Automatic addressing of functional modules enables untrained users to quickly perform cascade expansion operations.

Description of drawings

Fig. 1 is a schematic structural diagram of an instrument module of a modular electric meter according to the present invention.

Fig. 2 is a structural schematic diagram of another viewing angle of an instrument module of a modular electric meter according to the present invention.

Fig. 3 is a schematic diagram of the structure of a modular power meter of the present invention after cascading.

Fig. 4 is a schematic diagram of interfaces between cascaded modules of a modular electric meter according to the present invention.

Fig. 5 is a schematic diagram of a circuit state of a modular power meter of the present invention after cascading.

in:

Module body 1, card slot 2, buckle 3, push-type self-locking structure 4, barb 5, inverted groove 6, pressing plate 7, instrument case 8, expansion module 9.

Detailed ways

Referring to Figures 1 to 5, the present invention relates to a modular power meter, the modular power meter includes a meter housing 8 and a plurality of expansion modules 9, the expansion modules 9 include a module body 1, and the module The front end of one side of the body 1 is provided with a buckle 3, and the rear end is provided with a slot 2, and when the module body 1 is stacked and cascaded, the buckle 3 of the module body 1 of the next stage is inserted into the slot 2 of the module body 1 of the previous stage, The front end device on the other side of the module body 1 has a push-type self-locking structure 4, and the rear end is provided with an inverted groove 6. The push-type self-locking structure 4 includes a pressing plate 7 attached to the side wall of the module body 1 , and the end of the pressing plate 7 is provided with a barb 5, when the module body 1 is stacked and cascaded, the barb 5 of the module body 1 of the next stage is buckled into the inverted groove 6 of the module body 1 of the previous stage; One side of 8 is provided with a housing slot, and the other side is provided with a housing inverted slot. The buckle 3 of the module body 1 at the front end is inserted into the housing slot of the instrument housing 8, and the module body at the front end The barb 5 of 1 is buckled into the housing inverted groove of the meter housing 8;

When in use: first install the extension module 9 located at the front end on the instrument case 8, match the positioning through the card slot 2 and the buckle 3, and buckle into the 5 pairs of barbs in the inverted groove of the instrument case 8 The two are locked; then according to the requirements, multiple expansion modules 9 are sequentially cascaded and installed on the expansion module 9 at the front end; when disassembling: press the pressing plate 7 of the push-type self-locking structure 4 of the expansion module 9 , so that the barb 5 on the second-stage expansion module 9 exits the inverted groove 6 on the previous-stage expansion module 9 (or the instrument case 8);

Further, each expansion module 9 is equipped with an expansion circuit module, and the expansion circuit module includes a processor and an interface one SPI1 and an interface two SPI2 connected to the processor. The interface two SPI2 of the expansion circuit module is mated with the interface one SPI1 of the expansion circuit module located in the expansion module 9 of the previous stage (through the insertion and cooperation of the pin and the buckle); the instrument housing 8 is equipped with The main circuit module, the main circuit module includes the main processor and the interface two SPI2 connected with the main processor, the interface two SPI2 on the main circuit module in the instrument housing 8 and the expansion module 9 at the front end The interface of the expansion circuit module inside - SPI1 plug-in cooperation;

One addressing method:

The main processor in the instrument housing 8 and the processing of the expansion module 9 all store two address information in it, wherein the number stored in the first address information represents the functional category of the expansion circuit module (for example: 1 represents the switch module, 2 Represents the analog input and output module, 3 represents the communication module...and so on), the number stored in the second address information represents the number of functions that the expansion circuit module has before this expansion circuit module;

After receiving the message information sent by the previous stage expansion module 9, the latter stage expansion module first extracts the first address information in the message information, and combines the first address information with the first address information in the processor of the expansion module 9 bit phase comparison,

If there is the same first address information as the expansion module 9 in the message information of the previous level, the second address information corresponding to the first address information in the message information of the previous level is +1, and the The second address information after +1 is written into the second address information of the expansion module 9, and the modified first address information and second address information are sent to the subsequent expansion module 9 in the form of a message;

If there is no first address information identical to this expansion module 9 in the message information of the previous level, then the number in the second address information of this expansion module 9 is set to 0, and the same first address information of this expansion module 9 is set to 0. After the address information and the second address information are added to the message, they are sent to the next-level expansion module 9;

In this way, the automatic management of the address can be realized, and the address can be quickly and automatically encoded when any module is added;

for example:

address 1 (immutable), address 2 (variable), description;

1, 0, the first switch module in the instrument;

1. 1. The second switch module in the instrument;

1, 2, the third switch module in the instrument;

2, 0, the first analog module in the instrument;

3. 0. The first communication module in the instrument;

..., ..., ...;

The SPI1 of the subsequent expansion module 9 correctly receives the message of the SPI2 of the previous expansion module 9 and analyzes it. Assuming that the data of the module information in the message is all 0, it means that the previous stage only has the main module, and this module stores the name 2 Write 0 to the address of the module; if there are other modules detected in the message but there is no module of the same type as this module, write 0 to the address of this module storing name 2; if a module of the same type as this module is detected in the message module, the content of its name 2 is 0, and the address of this module storing name 2 is added to 0. If two modules of the same type as this module are detected in the message, the content of its name 2 is respectively 0 and 1, this module stores the address of name 2, add 2 on the basis of 1, and so on.

In addition: it should be noted that the above specific implementation is only an optimization solution of this patent, and any changes or improvements made by those skilled in the art based on the above ideas are within the scope of protection of this patent.

Claims (2)

1. A modular power meter, characterized by: the modularized electric power instrument comprises an instrument shell (8) and a plurality of expansion modules (9), wherein each expansion module (9) comprises a module body (1), a buckle (3) is arranged at the front end of one side of each module body (1), a clamping groove (2) is formed in the rear end of each module body (1), the buckle (3) of each rear-stage module body (1) is inserted into the clamping groove (2) of the corresponding front-stage module body (1) when the module bodies (1) are stacked and cascaded, an expansion circuit module is installed in each expansion module (9), a main circuit module is installed in each instrument shell (8), and the expansion circuit modules are connected with the main circuit modules in a splicing and matching manner;

the front end device on the other side of the module body (1) is provided with a pressing type self-locking structure (4), the rear end of the module body is provided with a reverse groove (6), the pressing type self-locking structure (4) comprises a pressing plate (7) attached to the side wall of the module body (1), the end part of the pressing plate (7) is provided with a barb (5), and the barb (5) of the next-stage module body (1) is buckled into the reverse groove (6) of the previous-stage module body (1) when the module bodies (1) are stacked and cascaded; a shell clamping groove is formed in one side of the instrument shell (8), a shell inverted groove is formed in the other side of the instrument shell, a buckle (3) of the module body (1) located at the foremost end is inserted into the shell clamping groove of the instrument shell (8), and a barb (5) of the module body (1) located at the foremost end is buckled into the shell inverted groove of the instrument shell (8);

the expansion circuit module comprises a processor, and a first interface (SPI 1) and a second interface (SPI 2) which are connected with the processor, wherein the second interface (SPI 2) of the expansion circuit module positioned in the expansion module (9) at the previous stage is in plug-in fit with the first interface (S PI 1) of the expansion circuit module positioned in the expansion module (9) at the next stage; the main circuit module comprises a main processor and a second interface (SPI 2) connected with the main processor, and the second interface (SPI 2) on the main circuit module in the instrument shell (8) is in plug-in fit with a first interface (SPI 1) of an expansion circuit module in an expansion module (9) located at the foremost end.

2. An addressing method of a modular power meter is characterized in that: two pieces of address information are stored in a main processor in the meter shell (8) and a processor of the expansion module (9), wherein the number stored in the first address information represents the function type of the expansion circuit module, and the number stored in the second address information represents the number of functions of the expansion circuit module existing in front of the expansion circuit module;

after the next-stage expansion module (9) receives the message information sent by the previous-stage expansion module, first address information in the message information is extracted, and the first address information is compared with a first address information bit in a processor of the expansion module (9),

if the message information of the previous stage has the first address information which is the same as the first address information of the expansion module (9), writing the second address information +1 corresponding to the first address information in the message information of the previous stage and the second address information after +1 into the second address information of the expansion module (9), and sending the modified first address information and the modified second address information to the expansion module (9) of the next stage in a message form;

if the first address information same as the expansion module (9) does not exist in the message information of the previous stage, the number in the second address information of the expansion module (9) is set to be 0, and the first address information and the second address information same as the expansion module (9) are added into the message and then sent to the expansion module (9) of the next stage.

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