CN207966132U - A kind of building block system residual current type detector for electric fire protection - Google Patents

Abstract

The utility model discloses a building block type residual current electrical fire monitoring detector, which comprises a plurality of sub-current acquisition modules for connecting residual current transformers and a main module for analyzing and controlling data of each sub-current acquisition module. Each sub-current acquisition module described above is connected to the main module through two buses for communication, and the structures of the plurality of sub-current acquisition modules are exactly the same. The utility model splices the main module and n current acquisition modules, and adopts a building block structure. One current acquisition module is spliced with the main module, or multiple current acquisition modules are spliced with the main module, and the number of residual current transformers is from One can be expanded to 64, which greatly increases the flexibility and convenience of on-site installation and use. So as to meet the needs of different numbers of current acquisition modules on site.

Description

A building block type residual current electrical fire monitoring detector

technical field

The utility model relates to the technical field of fire monitoring, in particular to a building block type residual current electrical fire monitoring detector.

Background technique

At present, in the fire-fighting electrical equipment, there is a device used to monitor whether the running state of the power line is safe. It can judge whether the line has potential safety hazards by detecting whether there is leakage in the power line. This device is called residual current electrical Fire monitoring detectors (hereinafter referred to as detectors). The detector uses the residual current transformer set in the line to induce the current, and the current is transmitted to the signal acquisition unit, and the acquisition unit transmits the signal to the signal processing unit, and after the signal processing unit analyzes and processes, it judges the operating status of the tested line Is it good. The existing traditional detector has an integrated structure, that is, the signal acquisition unit and the signal processing unit are designed in a fixed shell, and the number of external residual current transformers is also fixed, which brings difficulties to the actual installation and use. A lot of inconvenience.

Utility model content

The purpose of the utility model is to provide a building block type residual current electrical fire monitoring detector, which can solve the disadvantage that the number of external residual current transformers cannot be flexibly increased or decreased.

The technical scheme that the utility model adopts is:

A building block type residual current type electrical fire monitoring detector, including a plurality of sub-current acquisition modules for connecting residual current transformers and a main module for analyzing and controlling data of each sub-current acquisition module. The communication connection between the acquisition module and the main module is carried out through the second bus, and the structures of the multiple sub-current acquisition modules are exactly the same;

The main module includes a CPU processing unit, a display unit, a storage unit, a man-machine interface, an alarm unit, a second bus unit, and a communication unit; the output ends of the CPU processing unit are respectively connected to the display unit, the storage unit, the man-machine The interface and the input end of the alarm unit, the output end of the second bus unit are connected to the input end of the CPU processing unit through the first communication unit;

The sub-current acquisition module includes a current signal acquisition and arrangement unit, a CPU signal preprocessing unit, a second bus unit, and a communication unit. The input end of the current signal acquisition and arrangement unit is connected to the output end of the residual current transformer, and the current signal acquisition The output end of the sorting unit is connected to the input end of the CPU signal preprocessing unit, and the output end of the CPU signal preprocessing unit is connected to the input end of the second bus unit through the second communication unit.

There are multiple sub-current acquisition modules, and the plurality of sub-current acquisition modules are respectively connected to the CPU signal preprocessing unit through two bus modules.

Each sub-current acquisition module is provided with a unique code, which is used as an address code for communication with the main module.

While the current collection module communicates with the main module through the second bus, the main module supplies electric energy to the current collection module through the second bus.

The current acquisition module adopts a CPU signal preprocessing unit, and the CPU model is PIC10F320-SO.

The main module adopts a CPU processing unit, and the CPU model is PIC16F1507-SO.

The utility model splices the main module and n current acquisition modules, and adopts a building block structure. One current acquisition module is spliced with the main module, or multiple current acquisition modules are spliced with the main module, and the number of remaining current transformers is from 1 can be expanded to 64, which greatly increases the flexibility and convenience of on-site installation and use. So as to meet the needs of different numbers of current acquisition modules on site.

Description of drawings

Fig. 1 is the block diagram of circuit principle of the utility model.

Detailed ways

As shown in Figure 1, the utility model includes a plurality of sub-current acquisition modules for connecting residual current transformers and a main module for analyzing and controlling data of each sub-current acquisition module, the plurality of sub-current acquisition modules and the main module The modules are connected by communication through two buses, and the structure of the plurality of sub-current acquisition modules used to connect the residual current transformers is exactly the same, and the number of specific settings is the same according to the number of residual current transformers on site;

The main module includes a CPU processing unit, a display unit, a storage unit, a man-machine interface, an alarm unit, a second bus unit, and a communication unit; the output ends of the CPU processing unit are respectively connected to the display unit, the storage unit, the man-machine The input end of the interface and the alarm unit, the output end of the two bus units are connected to the input end of the CPU processing unit through the first communication unit; the main module uses the unique code of the current acquisition module as an address code to send a request signal to the current acquisition module The data command, the current acquisition module responds to the signal data, the main module processes the signal data responded by the current acquisition module, analyzes and judges, and displays the data on the display unit. Then, compare the signal data with the preset value of the storage unit, if the corresponding signal data is greater than or equal to the set value, the main module triggers the alarm unit to send an alarm signal. The preset value in the storage unit can be manually set through the man-machine interface.

The sub-current acquisition module includes a current signal acquisition and arrangement unit, a CPU signal preprocessing unit, a second bus unit, and a communication unit. The input end of the current signal acquisition and arrangement unit is connected to the output end of the residual current transformer, and the current signal acquisition The output end of the sorting unit is connected to the input end of the CPU signal preprocessing unit, and the output end of the CPU signal preprocessing unit is connected to the input end of the second bus unit through the second communication unit. In the sub-current acquisition module, the signal acquisition unit receives the current signal from the external residual current transformer and transmits it to the CPU preprocessing unit. The CPU preprocessing unit then transmits the signal to the communication unit, and the communication unit controls the second bus and transmits the signal to the main module through the second bus. Each of the sub-current acquisition modules described collects and organizes the currents induced by the residual current transformers, and then transmits the signals to the main module; the main module processes, analyzes and processes the signals transmitted by the current acquisition modules, and judges the nature and nature of the signals. If the signal size exceeds the set value, an alarm message will be sent and displayed.

There are multiple sub-current acquisition modules, and the plurality of sub-current acquisition modules are respectively connected to the CPU signal preprocessing unit through two bus modules. Each sub-current acquisition module is provided with a unique code, which is used as an address code for communication with the main module. The current collection module is connected with the main module through two buses. The second bus can not only supply power to the current acquisition module through the main module, but also serve as a channel for information exchange between the two. In the main module, the communication unit exchanges information with the current acquisition module through two buses. The main module performs one-to-one information exchange through the unique code of the current acquisition module.

The current acquisition module adopts CPU signal preprocessing unit CPU model is PIC10F320-SO.

The main module adopts CPU processing unit CPU model is PIC16F1507-SO

In the utility model, the main module is spliced with n current acquisition modules, like a stack, one current acquisition module is spliced with the main module, or a plurality of current acquisition modules is spliced with the main module, so as to adapt to different numbers of current acquisition modules on site. need.

Claims (6)

1. a kind of building block system residual current type detector for electric fire protection, it is characterised in that：Including multiple for connecting residue The electron current acquisition module of current transformer and to each electron current acquisition module carry out data analysis and Control primary module, institute Communication connection, and multiple electron current acquisition modules are carried out by two lines bus between each electron current acquisition module stated and primary module Structure it is identical；

The primary module includes CPU processing units, display unit, storage unit, man-machine interface, alarm unit, two lines bus Unit, communication unit；The output end of the CPU processing units is separately connected display unit, storage unit, man-machine interface and report The input terminal of alert unit, the output end of two lines bus unit connect the input terminal of CPU processing units by the first communication unit；

The electron current acquisition module includes current signal acquisition finishing unit, cpu signal pretreatment unit, two lines bus list Member, communication unit, the current signal acquire the output end of the input terminal connection residual current transformer of finishing unit, electric current The input terminal of the output end connection cpu signal pretreatment unit of signal acquisition finishing unit, the output of cpu signal pretreatment unit End is connect by the second communication unit with the input terminal of two lines bus unit.

2. building block system residual current type detector for electric fire protection according to claim 1, it is characterised in that：Described Electron current acquisition module has multiple, and multiple electron current acquisition modules pass through two lines bus module and cpu signal pretreatment unit respectively It is connected.

3. building block system residual current type detector for electric fire protection according to claim 2, it is characterised in that：Described Each electron current acquisition module is both provided with unique encodings, for as the address code communicated with primary module.

4. building block system residual current type detector for electric fire protection according to claim 3, it is characterised in that：Described While being communicated by two lines bus between current acquisition module and primary module, primary module gives current acquisition mould by two lines bus Block supplies electric energy.

5. building block system residual current type detector for electric fire protection according to claim 4, it is characterised in that：Described Current acquisition module uses cpu signal pretreatment unit, CPU models PIC10F320-SO.

6. building block system residual current type detector for electric fire protection according to claim 5, it is characterised in that：Described Primary module uses CPU processing units, CPU models PIC16F1507-SO.