CN210536655U

CN210536655U - Mining anti-interference communication module

Info

Publication number: CN210536655U
Application number: CN201922397819.7U
Authority: CN
Inventors: 胡峰平; 贾柏青; 孙成生
Original assignee: Zhenjiang Zhongmei Electron Co ltd
Current assignee: Zhenjiang Zhongmei Electron Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-05-15
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a mining anti-interference communication module, mining anti-interference communication module include main control single chip microcomputer unit, RS485 communication unit, the anti surge circuit of lightning protection, main control single chip microcomputer unit and RS485 communication unit communication connection, the anti surge circuit of lightning protection includes transient diode V1, transient diode V2, transient diode V3, resistance R18, resistance R19, electric capacity CF1, electric capacity CF 2; the model of the main control singlechip unit is STC11L04E, the models of the transient diode V1, the transient diode V2 and the transient diode V3 are P6KE6.8CA, and the models of the capacitor CF1 and the capacitor CF2 are 90 CSMD. The utility model discloses accord with mine actual environment, the interference killing feature is strong, data error rate is low, guarantees monitored control system bus data transmission safety.

Description

Mining anti-interference communication module

Technical Field

The utility model relates to a mining anti-interference communication module belongs to communication control technical field.

Background

The mine safety monitoring system is a new technology which is required by mine safety production at present and has a mature automation technology, and the reasonable use of the safety monitoring system can bring great help for mine safety production. By means of the mine safety monitoring system, workers can detect data through all position sensors of the monitoring system without underground inspection, and can master all position environment parameters of the whole mine. When the environmental parameters are out of limit, the system can automatically issue an alarm and control instruction to prompt the staff to pay attention and control the equipment in the dangerous area to be powered off. At present, national regulations have forced that a mine safety monitoring system must be installed in a mine as a key index for judging whether the mine meets production conditions or not. The mine monitoring communication substation is used as an important part of a mine safety monitoring system, but because a large amount of high-power equipment and frequency conversion equipment are used in a mine, the operation of the equipment brings interference to bus data transmission of the monitoring system, and the safety and stability of the bus data transmission of the monitoring system are influenced, so that the research and development of a communication module which is anti-interference, low in data error rate and in line with the actual environment of the mine has important significance for ensuring the bus data transmission safety of the monitoring system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mining anti-interference communication module accords with mine actual environment, and the interference killing feature is strong, guarantees monitored control system bus data transmission safety.

The purpose of the utility model is realized through the following technical scheme:

an anti-interference communication module for mining comprises a main control single chip microcomputer unit, an RS485 communication unit and a lightning protection anti-surge circuit, wherein the main control single chip microcomputer unit is in communication connection with the RS485 communication unit, the RS485 communication unit uses an isolation type RS485 transceiver chip U502 with the model of ADM2483, an RXD signal line and a TXD signal line of the main control single chip microcomputer unit are respectively connected with an RXD pin and a TXD pin of the isolation type RS485 transceiver chip U502, a receiving/sending control signal line 485-T/R of the main control single chip microcomputer unit is simultaneously connected with a DE pin and a/RE pin of the isolation type RS485 transceiver chip U502, the lightning protection anti-surge circuit comprises a transient diode V1, a transient diode V2, a transient diode V3, a resistor R18, a resistor R19, a capacitor CF1 and a capacitor CF2, the B end of an external signal acquisition line is connected with the B pin of the isolation type RS485 transceiver chip U502 through a resistor R19, the A end of the external signal acquisition line is connected with the A pin of the isolation type RS, the capacitor CF1 is connected in series with the capacitor CF2, two ends of the series circuit are respectively connected with an A end and a B end of an external signal acquisition line, a lead between the capacitor CF1 and the capacitor CF2 is grounded, anodes of the transient diode V1 and the transient diode V2 are grounded, a cathode of the transient diode V1 is connected with an A pin of the isolation type RS485 transceiver chip U502, a cathode of the transient diode V2 is connected with a B pin of the isolation type RS485 transceiver chip U502, an anode of the transient diode V3 is connected with an A pin of the isolation type RS485 transceiver chip U502, and a cathode of the transient diode V3 is connected with a B pin of the isolation type RS485 transceiver chip U502.

The purpose of the utility model can be further realized through the following technical measures:

the mining anti-interference communication module is characterized in that the model of a main control single chip microcomputer unit is STC11L04E, the models of a transient diode V1, a transient diode V2 and a transient diode V3 are P6KE6.8CA, and the models of a capacitor CF1 and a capacitor CF2 are 90 CSMD.

The mining anti-interference communication module further comprises a common-mode inductor H501 with the model of DW501, wherein the common-mode inductor H501 is arranged between pins A and B of the isolation type RS485 transceiver chip U502 and the lightning protection surge protection circuit.

Compared with the prior art, the beneficial effects of the utility model are that:

the mining anti-interference communication module is simple and practical, low in power consumption, stable in performance and high in operation speed, and adopts a domestic 51-core single-chip microcomputer macrocrystal STC11L 04E. The 485 communication chip adopts an ADM2483 magnetic isolation RS485 driving chip, a communication bus and an internal power supply are effectively isolated, the operation is simple and efficient, and all peripheral communication interfaces reach 3000KV electrostatic protection level through an isolation module. The lightning protection surge-resistant circuit module realizes the electrical interference protection on the circuit, and the whole circuit accords with the intrinsic safety characteristic for coal mines. The method is suitable for the data communication hardware link between the devices in the mine strong electromagnetic interference environment, and can be applied to mine safety monitoring systems, mine personnel positioning systems, mine automatic control systems and the like.

Drawings

Fig. 1 is the utility model discloses a mining anti-interference communication module circuit diagram.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

As shown in fig. 1, the utility model discloses a mining anti-interference communication module, including main control single chip microcomputer unit 1, RS485 communication unit 2, the anti-surge circuit 3 of lightning protection, main control single chip microcomputer unit's singlechip model is STC11L04E, main control single chip microcomputer unit 1 and RS485 communication unit 2 communication connection, RS485 communication unit 2 uses isolated form RS485 transceiver chip U502, the model is ADM2483, ADM2483 differential bus transceiver is an integrated form current isolation device, be applicable to the two-way data communication of multiple spot bus transmission line. It is designed for balanced transmission lines and conforms to the ANSI TIA/EIA RS-485-A and ISO 8482:1987(E) standards. The device integrates a 3-channel isolator, a tri-state differential line driver and a differential input receiver in a single package using the adopter technology of ADI corporation. An RXD signal line and a TXD signal line of a master control single chip microcomputer unit 1 are respectively connected with an RXD pin and a TXD pin of an isolation type RS485 transceiver chip U502, a receiving/sending control signal line 485-T/R of the master control single chip microcomputer unit 1 is simultaneously connected with a DE pin and a/RE pin of the isolation type RS485 transceiver chip U502, a lightning protection and surge resistance circuit 3 comprises a transient diode V1, a transient diode V2, a transient diode V3, a resistor R18, a resistor R19, a capacitor CF1 and a capacitor CF2, the models of the transient diode V1, the transient diode V2 and the transient diode V3 are P6KE6.8CA, and the transient diode (transient voltage supply) is abbreviated as TVS. Its advantages are high response speed (ps class), small size, high pulse power and low voltage of clamping voltage. The capacitor CF1 and the capacitor CF2 are 90CSMD in type. The B end of an external signal acquisition line is connected with the B pin of the isolation type RS485 transceiver chip U502 through a resistor R19, the A end of the external signal acquisition line is connected with the A pin of the isolation type RS485 transceiver chip U502 through a resistor R18, the capacitor CF1 is connected with the capacitor CF2 in series, two ends of a series circuit are respectively connected with the A end and the B end of the external signal acquisition line, a lead between the capacitor CF1 and the capacitor CF2 is grounded, anodes of the transient diode V1 and the transient diode V2 are grounded, a cathode of the transient diode V1 is connected with the A pin of the isolation type RS485 transceiver chip U502, a cathode of the transient diode V2 is connected with the B pin of the isolation type RS485 transceiver chip U502, an anode of the transient diode V3 is connected with the A pin of the isolation type RS485 transceiver chip U502, and a cathode of the transient diode V3 is connected with the B pin of the isolation type RS485 transceiver chip U502.

Preferably, the mining anti-interference communication module further comprises a common-mode inductor H501 with the model of DW501, and the common-mode inductor H501 is arranged between pins a and B of the isolation type RS485 transceiver chip U502 and the lightning protection surge protection circuit. Signals output by the lightning protection surge protection circuit are input into the pin A and the pin B of the isolation type RS485 transceiver chip U502 through the common mode inductor H501, and the common mode inductor H501 inhibits high-frequency harmonic interference (such as frequency converter interference) in a circuit.

The 485 communication chip adopts an ADM2483 magnetic isolation RS485 driving chip, a communication bus and an internal power supply are effectively isolated, the chip is simple and efficient, and all peripheral communication interfaces reach 3000KV electrostatic protection level through the isolation module. The lightning protection surge resistant circuit module realizes the electrical interference protection on the circuit, the whole circuit accords with the intrinsic safety characteristic of the coal mine, the anti-interference capability is strong, and the bus data transmission safety of the monitoring system is ensured.

In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An anti-interference communication module for mining comprises a main control single chip microcomputer unit, an RS485 communication unit and a lightning protection and surge prevention circuit, wherein the main control single chip microcomputer unit is in communication connection with the RS485 communication unit, the RS485 communication unit uses an isolation type RS485 transceiver chip U502 with the model of ADM2483, an RXD signal line and a TXD signal line of the main control single chip microcomputer unit are respectively connected with an RXD pin and a TXD pin of the isolation type RS485 transceiver chip U502, a receiving/transmitting control signal line 485-T/R of the main control single chip microcomputer unit is simultaneously connected with a DE pin and a/RE pin of the isolation type RS485 transceiver chip U502, the lightning protection and surge prevention circuit comprises a transient diode V1, a transient diode V2, a transient diode V3, a resistor R18, a resistor R19, a capacitor CF1 and a capacitor CF2, a B end of an external signal acquisition line is connected with a B pin of the isolation type RS485 transceiver chip U502 through a resistor R39, an A end of an external signal acquisition line is connected with an A pin of an isolation type RS485 transceiver chip U502 through a resistor R18, the capacitor CF1 is connected with a capacitor CF2 in series, two ends of a series circuit are respectively connected with the A end and a B end of the external signal acquisition line, a lead between the capacitor CF1 and the capacitor CF2 is grounded, anodes of the transient diode V1 and the transient diode V2 are grounded, a cathode of the transient diode V1 is connected with the A pin of the isolation type RS485 transceiver chip U502, a cathode of the transient diode V2 is connected with a B pin of the isolation type RS485 transceiver chip U502, an anode of the transient diode V3 is connected with the A pin of the isolation type RS485 transceiver chip U502, and a cathode of the transient diode V3 is connected with the B pin of the isolation type RS485 transceiver chip U502.

2. The mining anti-interference communication module according to claim 1, wherein the master single chip microcomputer unit has a single chip microcomputer model of STC11L04E, a transient diode V1, a transient diode V2, a transient diode V3 model P6KE6.8CA, and capacitors CF1 and CF2 model 90 CSMD.

3. The mining anti-interference communication module according to claim 1, further comprising a common mode inductor H501, the type of which is DW501, wherein the common mode inductor H501 is arranged between the pin a and the pin B of the isolated RS485 transceiver chip U502 and the lightning protection surge protection circuit.