CN202018733U

CN202018733U - Circuit system for detection and transmission of data of intrinsic safety type detector

Info

Publication number: CN202018733U
Application number: CN2011200774485U
Authority: CN
Inventors: 金振华; 陈宜; 彭宙; 周家伟; 束保华
Original assignee: INET INDUSTRIAL SCIENTIFIC (SHANGHAI) Co Ltd
Current assignee: INET INDUSTRIAL SCIENTIFIC (SHANGHAI) Co Ltd
Priority date: 2011-03-22
Filing date: 2011-03-22
Publication date: 2011-10-26
Anticipated expiration: 2021-03-22

Abstract

The utility model relates to a circuit system for the detection and transmission of the data of an intrinsic safety type detector, which comprises a gas signal detection circuit and a data transmission circuit, the gas signal detection circuit comprises a sensor detection module, a signal conditioner and an analog-to-digital converter, and the data transmission circuit comprises a singlechip, an infrared coder-decoder and an infrared transceiver. The gas signal detection circuit in the intrinsic safety type instrument is utilized to detect the concentration of toxic and harmful gases in a work site, carry out analog-to-digital conversion, store signals into the internal register of the singlechip and then communicate with the external infrared coder-decoder via the serial port unit of the singlechip, so that the infrared coder-decoder can transmit the serial data of the singlechip to the infrared transceiver in the form of electrical pulses and then transmit the data acquired by the detector to other external devices by way of infrared transmission, data transmission is fast and reliable and consumes low transceiving power, and low-cost wireless transmission is realized.

Description

The circuit arrangement of intrinsic safety type detection instrument Data Detection and transmission

Technical field:

The utility model relates to a kind of intrinsic safety type detection instrument, more specifically to the circuit arrangement of a kind of intrinsic safety type detection instrument Data Detection and transmission.

Background technology:

In the use of intrinsic safety type instrument, often Various types of data, the parameter of instrument internal storage need be sent to other external units such as main frame.Because the intrinsic explosion-proof performance requirement of intrinsic safety type instrument, on circuit design, strict restriction is arranged for performance index such as components and parts heating power, device pitch, working current/voltages, therefore need take simple, active data communication mode, to reduce the design difficulty of intrinsically safe circuit.At present transmission information is commonly used communication modes such as USB, RS485, and these modes are because of the site environment complexity, and cost of equipment is big, poor work stability, security also have problems, and operation easier, result of use, operation costs are all undesirable.

The utility model content:

The purpose of this utility model is to provide a kind of infrared communication technique that utilizes with the data security intrinsic safety type detection instrument Data Detection reliable, convenient and swift, that transmit between two equipment at low cost of collection and the circuit arrangement of transmission at the prior art weak point.

The purpose of this utility model is to realize by following measure: the circuit arrangement of a kind of intrinsic safety type detection instrument Data Detection and transmission, comprise the gas signal testing circuit of forming by sensor module, signal condition, analog to digital converter, it is characterized in that also having the data transmission circuit of forming by single-chip microcomputer, infrared coding/demoder, infrared transceiver; The single-chip microcomputer of described data transmission circuit is provided with general serial data bus UART serial ports, the TX of the TX pin of described infrared coding/demoder and single-chip microcomputer UART serial ports joins, the TXIR pin of infrared coding/demoder connects the TXD pin of infrared transceiver, the RX of the RX pin of infrared coding/demoder and single-chip microcomputer UART serial ports joins, the RXIR pin of infrared coding/demoder connects the RXD pin of infrared transceiver, the I/O I/O interface of single-chip microcomputer connects the MODE pin of infrared coding/demoder, and the analog to digital converter output terminal of described gas signal testing circuit connects another I/O I/O interface of single-chip microcomputer.

Compared with prior art, the intrinsic safety type detection instrument Data Detection that the utility model proposes and the circuit arrangement of transmission, have following advantage: the gas signal testing circuit by the intrinsic safety type instrument internal is poisonous to the working site, harmful gas carries out concentration and detects, serial equipment by single-chip microcomputer then, communicate with the infrared coding/demoder of outside, make coder/decoder that the serial data of single-chip microcomputer is sent to infrared transceiver with the form of electric pulse, the data transmission of detection instrument being gathered with the form of Infrared Transmission arrives other external units again, data transmission has at a high speed, reliably, transmitting-receiving power is low, has realized wireless transmission cheaply.

Description of drawings:

Fig. 1 is the structural representation of an embodiment the utility model proposes.

Embodiment:

Below in conjunction with accompanying drawing embodiment is elaborated:

Fig. 1 has provided the structural representation of an embodiment who the utility model proposes.Among the figure, the circuit arrangement of a kind of intrinsic safety type detection instrument Data Detection and transmission has: gas signal testing circuit of being made up of sensor module 4, signal condition 5, analog to digital converter 6 and the data transmission circuit of being made up of single-chip microcomputer 1, infrared coding/demoder 2, infrared transceiver 3.The sensor module of data detection circuit is made up of electrochemical sensor or catalytic combustion sensor, poisonous, the harmful gas of working site is carried out concentration detect, and sends tested gas signal to the signal condition module then; The signal condition module is carried out filtering etc. to gas signal and is gone to disturb and handle, and passes the signal to the analog to digital converter module then, and the analog to digital converter output terminal connects an I/O I/O interface of single-chip microcomputer; Analog to digital converter carries out analog to digital conversion with tested gas signal under the control of single-chip microcomputer, making the signal from analog quantitative change is the digital quantity that single-chip microcomputer can be discerned, and is kept in the internal register of single-chip microcomputer.The above phase one for intrinsic safety type detection instrument Data Detection and transmission is the gas signal detection-phase.The single-chip microcomputer 1 of described data transmission circuit is provided with general serial data bus UART serial ports, it is infrared coding/demoder of MCP2120 that described infrared coding/demoder 2 adopts model, and the TX pin of MCP2120 joins with the TX of single-chip microcomputer UART serial ports, the TXIR pin of MCP2120 is connected the TXD pin of infrared transceiver.Like this, the reception of the TX pin of MCP2120 sends by the TXIR pin behind infrared coding/demoder coding from the data of single-chip microcomputer UART, and the TXD pin of infrared transceiver receives the electric pulse of TXIR transmission and sends with the form of light pulse.The RX pin of MCP2120 joins with the RX of single-chip microcomputer UART serial ports, the RXIR pin of MCP2120 is connected the RXD pin of infrared transceiver.The light pulse that receives by infrared transceiver convert electric pulse to and after the output of RXD pin the RXIR pin by MCP2120 enter code translator and decipher, be fed to the UART of single-chip microcomputer then through the RX pin.The I/O I/O interface of single-chip microcomputer connects the MODE pin of infrared coding/demoder.Single-chip microcomputer is drawn high the EN pin of MCP2120 by the I/O port, makes MCP2120 enter transceiver mode.By above operation, under the control of single-chip microcomputer, the subordinate phase of having finished intrinsic safety type detection instrument Data Detection and transmission promptly detects data transfer phase.

The foregoing description does not constitute restriction of the present utility model, and all employings are equal to the technical scheme that form obtained of replacement or equivalent transformation, all drop within the protection domain of the present utility model.

Claims

1. the circuit arrangement of intrinsic safety type detection instrument Data Detection and transmission, comprise the gas signal testing circuit of forming by sensor module, signal condition, analog to digital converter, it is characterized in that also having the data transmission circuit of forming by single-chip microcomputer, infrared coding/demoder, infrared transceiver; The single-chip microcomputer of described data transmission circuit is provided with general serial data bus UART serial ports, the TX of the TX pin of described infrared coding/demoder and single-chip microcomputer UART serial ports joins, the TXIR pin of infrared coding/demoder connects the TXD pin of infrared transceiver, the RX of the RX pin of infrared coding/demoder and single-chip microcomputer UART serial ports joins, the RXIR pin of infrared coding/demoder connects the RXD pin of infrared transceiver, the I/O I/O interface of single-chip microcomputer connects the MODE pin of infrared coding/demoder, and the analog to digital converter output terminal of described gas signal testing circuit connects another I/O I/O interface of single-chip microcomputer.