CN106291223A - A kind of communication cable security maintenance service system - Google Patents

Abstract

The invention relates to a communication cable safety maintenance service system, which includes a plurality of monitoring terminals arranged on the surface of the cable joints for detecting the signal induction of the cable joints, several data collectors wirelessly connected to the monitoring terminals, and the data The maintenance computer connected to the collector; the monitoring terminal includes: a controller, a signal induction sensor arranged on the surface of the cable joint, an EEPROM memory, a wireless transmission chip, a clock calendar chip and an antenna connected to the wireless transmission chip, wherein the The signal induction sensor, the EEPROM memory, the wireless transmission chip and the clock calendar chip are all connected to the controller. The invention adopts the wireless transmission technology to realize the signal induction monitoring at the communication cable joint, the system structure is simple, the installation and maintenance are very convenient, and the fault point can be judged in time, effectively avoiding the occurrence of hidden danger accidents, and improving the use safety of the communication cable .

Description

A communication cable safety maintenance service system

technical field

The invention relates to a communication cable safety maintenance service system, which belongs to the technical field of communication.

Background technique

Most of the communication cable failures are caused by the failure of communication cable accessories, and the cable joint is the weakest link in the safe operation of the communication cable system. The main reason is that it is affected by adverse environmental factors and limited by the production process during production. The quality of communication cable connection joints is directly related to the safety of communication cable operation. Therefore, it is necessary to adopt a suitable method for safe maintenance of communication cables, especially for the safety monitoring and maintenance of communication cable connection joints.

Contents of the invention

The purpose of the present invention is to provide a communication cable safety maintenance service system, which can reduce communication cable failures caused by communication cable joint problems and reduce communication cable failures by conducting safety monitoring for communication cable joints and adopting appropriate methods for safety maintenance. security impact.

In order to achieve the above object, the technical solution of the present invention is as follows.

The present invention adopts the following technical solutions to realize.

A communication cable safety maintenance service system, comprising a plurality of monitoring terminals arranged on the surface of cable joints for detecting signal induction of cable joints, several data collectors wirelessly connected to the monitoring terminals, connected to the data collectors The maintenance computer; the monitoring terminal includes: a controller, a signal induction sensor arranged on the surface of the cable joint, an EEPROM memory, a wireless transmission chip, a clock calendar chip and an antenna connected to the wireless transmission chip, wherein the signal induction The sensor, the EEPROM memory, the wireless transmission chip and the clock calendar chip are all connected to the controller; the port SDA, port SDL and write protection port WP of the EEPROM memory are respectively connected to the controller through a pull-up resistor The P1.5 port, P1.6 port and P1.7 port are connected; the data collector includes a housing and a circuit board arranged in the housing, and the circuit board includes: an antenna; a wireless transmission chip connected to the antenna; The controller of the wireless transmission chip; and an interface circuit connected between the controller and the maintenance computer; the interface circuit includes: an interface chip connected to the controller, and an interface chip connected to the interface chip RS-485 interface with the maintenance computer.

The communication cable safety maintenance service system includes a plurality of monitoring terminals installed on the surface of the cable joint for detecting the signal induction of the cable joint; Way. The data collector is connected to the maintenance computer, and the data collected by the data collector is transmitted to the maintenance computer in the form of wired communication. The monitoring terminal includes a controller implemented by a single-chip microcomputer MSP430F149, a signal induction sensor arranged on the surface of the cable joint, and the signal induction sensor adopts a digital signal induction sensor, which is connected to the P1.0 and P1.1 data ports of the controller; The connected EEPROM memory; the wireless transmission chip and the clock calendar chip connected to the controller, the wireless transmission chip adopts the nRF401 wireless transceiver developed by Nordic company in Norway, and the serial communication port of the MSP430F149 can directly communicate with the nRF401 wireless transceiver , the control signals sent by the P4.7 and P4.6 ports of the single-chip microcomputer MSP430F149 are used to set the RF working frequency band and output power through the serial peripheral interface CS and RF_PWR of the nRF401 wireless transceiver; and the clock calendar chip adopts a Philips company. An industrial-grade low-power multi-function clock/calendar with I2C bus interface, the model is PCF8563 chip; and the wireless transmission chip is connected to the antenna. The AT24C256 chip of ATMEL company is selected as the core chip of the data storage unit for the EEPROM memory, and its port SDA, port SDL and write protection port WP are respectively connected to the P1.5~P1.7 ports of the single-chip microcomputer MSP430F149 through pull-up resistors, and the single-chip microcomputer MSP430F149 is connected through the port P1.7 is used to control the write protection switch of the AT24C256 chip. When P1.7 is in the input state, due to the effect of the pull-up resistor, the write protection port WP maintains a high level, and the current consumption is approximately 0. When writing is required, set the P1.7 port to the output state and output a low level, so that the potential of the write-protected port WP pin becomes 0, and the current consumption is about 0.3mA. After the writing is completed, the P1.7 port restarts. It becomes the input state, and the AT24C256 chip is write-protected.

Cables are generally buried under the ground, so the monitoring terminal is also set under the ground, and the antenna is set above the ground through wires.

The signal induction sensor detects the signal induction on the surface of the cable joint, the signal induction data is stored in the EEPROM memory, and then the wireless transmission chip sends the signal induction data and the calendar and time information provided by the clock calendar chip to the data collector wirelessly .

The data collector is a portable terminal device carried by a worker, and includes a casing and a circuit board arranged in the casing. Among them, the circuit board of the data collector specifically includes: antenna; the wireless transmission chip connected to the antenna, which is also realized by the nRF401 wireless transceiver developed by Nordic Company in Norway; The interface chip of the controller, the interface chip uses a MAX485 chip, and the RS-485 interface connected to the interface chip MAX485 is connected to the maintenance computer through the RS-485 interface.

The data collector adopts the MAX485 chip produced by Maxim Company as the RS485 communication transceiver. MAX485 has the RS-485 communication protocol, the transmission distance is >1km, and the transmission rate reaches 250kb/s. The controller is connected with the maintenance computer through the RS-485 bus, and the maintenance computer issues remote control instructions and collects data, forming a master-slave RS-485 communication application system.

The maintenance computer can display the signal induction value and alarm status of the on-site monitoring points transmitted by each monitoring terminal. The data transmitted from each monitoring point can be judged by the signal induction value of the on-site inspection equipment. Therefore, the maintenance computer mainly performs signal induction. Analysis of the abnormal rate, if the abnormal rate of signal induction at a certain point is significantly higher than that of other monitoring points, and the value is also higher than the historical data, it can be analyzed that the cable joint at this point may be faulty. The maintenance computer can also modify the signal sensing upper limit setting value of each monitoring terminal on site online, and can also directly modify a monitoring signal sensing setting value offline through wireless transmission.

The beneficial effect of the present invention is that: the present invention adopts the wireless transmission technology to realize the signal induction monitoring at the communication cable joint, the system structure is simple, the installation and maintenance are very convenient, and the fault point can be judged in time, effectively avoiding the occurrence of hidden danger accidents, Improve the safety of communication cables.

Description of drawings

FIG. 1 is an architecture diagram of a model serialization tool used in an embodiment of the present invention.

detailed description

Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so as to better understand the present invention.

Example

As shown in Figure 1, the communication cable safety maintenance service system includes a plurality of monitoring terminals arranged on the surface of the cable joint for detecting the signal induction of the cable joint; a data collector for collecting data from each monitoring terminal, and the data collector and the monitoring terminal using wireless communication. The data collector is connected to the maintenance computer, and the data collected by the data collector is transmitted to the maintenance computer in the form of wired communication. The monitoring terminal includes a controller implemented by a single-chip microcomputer MSP430F149, a signal induction sensor arranged on the surface of the cable joint, and the signal induction sensor adopts a digital signal induction sensor, which is connected to the P1.0 and P1.1 data ports of the controller; The connected EEPROM memory; the wireless transmission chip and the clock calendar chip connected to the controller, the wireless transmission chip adopts the nRF401 wireless transceiver developed by Nordic company in Norway, and the serial communication port of the MSP430F149 can directly communicate with the nRF401 wireless transceiver , the control signals sent by the P4.7 and P4.6 ports of the single-chip microcomputer MSP430F149 are used to set the RF working frequency band and output power through the serial peripheral interface CS and RF_PWR of the nRF401 wireless transceiver; and the clock calendar chip adopts a Philips company. An industrial-grade low-power multi-function clock/calendar with I2C bus interface, the model is PCF8563 chip; and the wireless transmission chip is connected to the antenna. The AT24C256 chip of ATMEL company is selected as the core chip of the data storage unit for the EEPROM memory, and its port SDA, port SDL and write protection port WP are respectively connected to the P1.5~P1.7 ports of the single-chip microcomputer MSP430F149 through pull-up resistors, and the single-chip microcomputer MSP430F149 is connected through the port P1.7 is used to control the write protection switch of the AT24C256 chip. When P1.7 is in the input state, due to the effect of the pull-up resistor, the write protection port WP maintains a high level, and the current consumption is approximately 0. When writing is required, set the P1.7 port to the output state and output a low level, so that the potential of the write-protected port WP pin becomes 0, and the current consumption is about 0.3mA. After the writing is completed, the P1.7 port restarts. It becomes the input state, and the AT24C256 chip is write-protected.

Cables are generally buried under the ground, so the monitoring terminal is also set under the ground, and the antenna is set above the ground through wires.

The signal induction sensor detects the signal induction on the surface of the cable joint, the signal induction data is stored in the EEPROM memory, and then the wireless transmission chip sends the signal induction data and the calendar and time information provided by the clock calendar chip to the data collector wirelessly .

The data collector is a portable terminal device carried by a worker, and includes a casing and a circuit board arranged in the casing. Among them, the circuit board of the data collector specifically includes: antenna; the wireless transmission chip connected to the antenna, which is also realized by the nRF401 wireless transceiver developed by Nordic Company in Norway; The interface chip of the controller, the interface chip uses a MAX485 chip, and the RS-485 interface connected to the interface chip MAX485 is connected to the maintenance computer through the RS-485 interface.

The data collector adopts the MAX485 chip produced by Maxim Company as the RS485 communication transceiver. MAX485 has the RS-485 communication protocol, the transmission distance is >1km, and the transmission rate reaches 250kb/s. The controller is connected with the maintenance computer through the RS-485 bus, and the maintenance computer issues remote control instructions and collects data, forming a master-slave RS-485 communication application system.

The maintenance computer can display the signal induction value and alarm status of the on-site monitoring points transmitted by each monitoring terminal. The data transmitted from each monitoring point can be judged by the signal induction value of the on-site inspection equipment. Therefore, the maintenance computer mainly performs signal induction. Analysis of the abnormal rate, if the abnormal rate of signal induction at a certain point is significantly higher than that of other monitoring points, and the value is also higher than the historical data, it can be analyzed that the cable joint at this point may be faulty. The maintenance computer can also modify the signal sensing upper limit setting value of each monitoring terminal on site online, and can also directly modify a monitoring signal sensing setting value offline through wireless transmission.

The above description is a preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications are also made, and these improvements and modifications are also considered as protection scope of the present invention.

Claims (7)

1. A communication cable safety maintenance service system, characterized in that: it includes a plurality of monitoring terminals arranged on the surface of the cable joint for detecting the signal induction of the cable joint, several data collectors connected by wireless communication with the monitoring terminal, and The maintenance computer connected to the data collector; the monitoring terminal includes: a controller, a signal induction sensor arranged on the surface of the cable joint, an EEPROM memory, a wireless transmission chip, a clock calendar chip and an antenna connected to the wireless transmission chip, Wherein, the signal induction sensor, the EEPROM memory, the wireless transmission chip and the clock calendar chip are all connected to the controller; the port SDA, port SDL and write protection port WP of the EEPROM memory are respectively connected by pull-up The resistance is connected to the P1.5 port, P1.6 port and P1.7 port of the controller; the data collector includes a housing and a circuit board arranged in the housing, and the circuit board includes: an antenna; connect the antenna a wireless transmission chip; a controller connected to the wireless transmission chip; and an interface circuit connected between the controller and the maintenance computer; the interface circuit includes: an interface chip connected to the controller, and RS-485 interface connected between the interface chip and the maintenance computer. 2. The communication cable safety maintenance service system according to claim 1, characterized in that: it includes a plurality of monitoring terminals arranged on the surface of the cable joint for detecting the signal induction of the cable joint; a data collector for collecting the data of each monitoring terminal , the wireless communication is adopted between the data collector and the monitoring terminal; the data collector is connected to the maintenance computer, and the data collected by the data collector is transmitted to the maintenance computer in the form of wired communication; the monitoring terminal includes a controller, setting The signal induction sensor on the surface of the cable joint, the signal induction sensor adopts a digital signal induction sensor, which is connected to the P1.0 and P1.1 data ports of the controller; the EEPROM memory connected to the controller; the wireless transmission connected to the controller Chip and clock calendar chip, the wireless transmission chip adopts the nRF401 wireless transceiver developed by Nordic company in Norway, the serial communication port of the MSP430F149 can directly communicate with the nRF401 wireless transceiver, the P4.7 and P4.6 ports of the MSP430F149 The control signal sent out is set through the serial peripheral interface CS and RF_PWR of the nRF401 wireless transceiver to set the radio frequency operating frequency band and output power; and the clock calendar chip adopts an industrial-grade low-power multiplexer with I2C bus interface launched by Philips. The function clock/calendar, the model is PCF8563 chip; and the wireless transmission chip is connected to the antenna; the EEPROM memory chooses the AT24C256 chip of ATMEL company as the core chip of the data storage unit, and its port SDA, port SDL and write protection port WP are respectively connected with the microcontroller MSP430F149 Ports P1.5～P1.7 are connected through a pull-up resistor, and the microcontroller MSP430F149 controls the write protection switch of the AT24C256 chip through port P1.7; when P1.7 is in the input state, due to the effect of the pull-up resistor, the write protection port WP Keep the high level, and the current consumption is approximately 0; when it is necessary to write, set the P1.7 port to the output state, and output a low level, so that the potential of the write protection port WP pin becomes 0, and the current consumption is about 0.3mA , after the writing is completed, the P1.7 port becomes the input state again, and the AT24C256 chip is protected. 3. The communication cable safety maintenance service system according to claim 1, characterized in that: the monitoring terminal is also set under the ground, and the antenna is set above the ground through wires. 4. The communication cable safety maintenance service system according to claim 1, characterized in that: the signal induction sensor detects the signal induction on the surface of the cable joint, the signal induction data is stored in the EEPROM memory, and then the signal induction is performed by the wireless transmission chip The data and clock calendar chip provides the calendar and time information detected by signal induction and sends it wirelessly to the data collector. 5. The communication cable safety maintenance service system according to claim 1, characterized in that: the data collector is a portable terminal device carried by the staff, including a housing and a circuit board arranged in the housing; wherein, the data collector The circuit board specifically includes: antenna; the wireless transmission chip connected to the antenna, which is also realized by the nRF401 wireless transceiver developed by Nordic company in Norway; the controller connected to the wireless transmission chip, which is also realized by the single-chip microcomputer SP430F149; the interface chip connected to the controller, The interface chip uses the MAX485 chip and the RS-485 interface connected to the interface chip MAX485, and is connected to the maintenance computer through the RS-485 interface. 6. The communication cable safety maintenance service system according to claim 1, characterized in that: the data collector adopts the MAX485 chip produced by Maxim Company as the RS485 communication transceiver, MAX485 has the RS-485 communication protocol, and the transmission distance＞1km, transmission The rate is up to 250kb/s; the controller is connected with the maintenance computer through the RS-485 bus, and the maintenance computer issues remote control instructions and collects data to form a master-slave RS-485 communication application system. 7. The communication cable safety maintenance service system according to claim 1, characterized in that: the maintenance computer can display the signal induction value and alarm status of the on-site monitoring points transmitted by each monitoring terminal, and the data transmitted from each monitoring point It can be judged by the signal induction value of the on-site inspection equipment. Therefore, the maintenance computer mainly analyzes the abnormal rate of signal induction. It can analyze the possible failure of the cable joint at this place; the maintenance computer can also modify the signal sensing upper limit setting value of each monitoring terminal on site online, and can also directly modify a monitoring signal sensing setting value offline through wireless transmission.