CN2358225Y

CN2358225Y - Practical wireless cycle monitoring system for working condition of oil-producing machine

Info

Publication number: CN2358225Y
Application number: CN 98203143
Authority: CN
Inventors: 杨睿
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-03
Filing date: 1998-04-03
Publication date: 2000-01-12
Anticipated expiration: 2008-04-03

Abstract

The utility model provides a practical wireless cycle monitoring system for the working conditions of oil-producing machines, which is composed of a primary station and a plurality of substations, wherein, the substations are arranged on the oil-producing machines, and the primary station is arranged in a control chamber. The utility model is characterized in that each of the substations is inquired by the primary station one by sending the address codes of the substations; the information exchange between the primary station and the substations are carried out by DTMF signal.

Description

A kind of wireless itinerant monitor system of oil production machine working condition system of practicality

The utility model relates to a kind of wireless itinerant monitor system of working condition system that is used for the oil production machine of oil exploitation, particularly a kind of application dtmf signal (double-tone multi-frequency coding signal) transmits detected switching value state or data, and has the wireless itinerant monitor system of the oil production machine working condition system of voice broadcast function.

Existing oil production machine working condition wireless monitor system, the FSK modulation system is generally adopted in the transmission of switch amount or analog quantity, is about to binary signal and is modulated into fsk signal earlier, sends by wireless device again.Because FSK modulator price is higher, so generally being commonly used in lot of data, this mode to transmit, and real-time requires stronger situation, for having only simple switch amount or low volume data to transmit, or the not strong system of real-time requirement, adopt the FSK scheme just to seem very uneconomical, in addition, not fine or often have under the situation of thunder and lightning, flash interference at channel condition, adopt the FSK mode to be easy to occur error code or wrong report.This is very disadvantageous to a monitoring system.Because general simple switching value of transmission or the less data of only needing of oil production machine monitoring system, real-time requires not strong, but very high to reliability requirement, is not a desirable scheme so adopt the FSK modulation in such system.In addition, existing oil production machine monitoring of working condition system does not generally possess voice broadcast function.And this function is popular at the scene.

Task of the present utility model be to provide one promptly economic, practical, the reliable again wireless itinerant monitor system of oil production machine working condition system, this system can be under relatively poor channel condition reliable detection and transmission information, and the fault message of each oil production machine had clear and definite voice broadcast function.

The utility model is to adopt following method to realize: device that is called substation of each oil production machine dosage, this loading amount are responsible for the relevant amount of this oil production machine is gathered and handled, and convert the binary code of gained to dtmf signal and give wireless transmitter module; At Control Room a loading amount that is called main website is set, it is responsible for receiving the dtmf signal that each substation is sent, and it is reduced into binary code, determines that according to code certain substation has or not fault message then, if having, then shows and voice broadcast.Because the information transmission between main website and the substation is the dtmf signal that adopts.And dtmf signal has special-purpose sending and receiving chip, and with low cost, peripheral cell seldom, this has not only reduced system cost, and has simplified greatly that system is soft, the design of hardware.Because the special-purpose receiving chip of DTMF has very strong recognition reaction to dtmf signal, the few appearance misjudged, and so just makes the antijamming capability of system strengthen greatly, even also can reliably working under relatively poor channel condition in addition.

Accompanying drawing 1 is the native system block diagram

Accompanying drawing 2 is main website theory diagrams

Accompanying drawing 3 is theory diagrams of a substation

Be elaborated below in conjunction with accompanying drawing.

[1] is the single-chip microcomputer of main website in the accompanying drawing 2, has adopted the 89C51 single-chip microcomputer in the present embodiment.[2] be the mimic panel display circuit, this circuit mainly is made of LED, is used to show the fault type of each oil production machine.[3] be the parallel interface expanded circuit, what adopt in the present embodiment is two 8155 chips, and [4] are sound-compound-circuit, and one group of code that this circuit can be sent according to single-chip microcomputer is combined into corresponding voice and plays.[5] be DTMF own coding circuit, what adopt in the present embodiment is 5087 chips, this circuit can be transformed into corresponding dtmf signal to the binary code of input and give wireless transmitter module, is mainly used in to each substation at Ben Chu and sends address code, to realize the timesharing inquiry.[6] be the special-purpose decoding circuit of DTMF, what use in the present embodiment is 8870 chips, is mainly used in identification and receives the dtmf signal that each substation is sent, and it is reduced to binary code.[7] be wireless sending and receiving module, the frequency of using in the present embodiment is 230MHZ, power 3W, and transmission range is not less than 5KM.[8] be mini-printer, be used for record trouble information.[9] count initialization circuit for patrolling and examining platform, this circuit is made of dial switch, is mainly used in the platform number of setting the oil production machine that native system will patrol and examine in a sense cycle.[10] be the calendar clock circuit, that adopt in the present embodiment is DS12887, and this circuit is mainly used in the temporal information that warning is provided for system.[11] be the RS232 interface circuit, be used for communicating by letter with host computer.

[12] are single-chip microcomputer in the accompanying drawing 3, adopt 89C51 in the present embodiment.[13] be the address code initialization circuit of this substation, it is made of dial switch, and its setting value will determine the address number of this substation, and [14] are the parallel interface expanded circuit, have adopted a slice 8155 in the present embodiment.[15] be the switching value signal input circuit, in the present embodiment, all switching value signals all pass through connecting system after the light-coupled isolation.[16] be dtmf signal own coding circuit.What adopt in the present embodiment is 5087 chips, its effect is to convert the switching value state of this substation collection or analog data to dtmf signal to send wireless transmitter module, [17] be the special-purpose decoding circuit of DTMF, what adopt in the present embodiment is 8870 chips, is mainly used in identification, receives the address information that main website sends.[18] be wireless sending and receiving module.[19] be analog signal input and A/D change-over circuit.Adopt TLC0838 to make A/D converter in the present embodiment.

The operating principle of native system is such: detect in the circulation at each, the main website timesharing sends the address code of each substation one by one, inquires about each substation one by one, and every one-address code is all being given the return information of waiting for this station of reception in the fixed time.If return information includes fault type information, then main website will in time report and show this information.If do not receive return information in fixing time giving, then provide the demonstration of this station communication failure.Substation all is in accepting state usually, after receiving the address code that main website sends, all can compare with the address code of oneself setting, if both differences, then ignore,, subsequently the information of this substation is issued main website if this substation is just being inquired about by both identical main websites that then show.So just realized the process that each substation inquired about one by one by main website.Because dtmf signal is all adopted in the information transmission between main website and the substation, and the generation of this signal and identification are all finished by special chip, DTMF decoding chip particularly, have stronger identification and disturb interference performance, need not to be provided with again software, hardware filtering measure, thereby the design of hardware and software of system is simplified relatively, and reliability improves greatly.

In sum: itinerant monitor system system that this oil production machine working condition is wireless is made up of a main website and some substations, main website is by single-chip microcomputer [1], mimic panel display circuit [2], parallel interface expanded circuit [3], sound-compound-circuit [4], dtmf signal coding circuit [5], dtmf signal decoding circuit [6], radio receiving transmitting module [7], mini-printer [8], patrol and examine platform and count initialization circuit [9], calendar clock circuit [10], RS232 interface circuit [11] constitutes, substation is by single-chip microprocessor [12], address code initialization circuit [13], parallel interface expanded circuit [14], variable connector amount signal input circuit [15], dtmf code circuit [16], DTMF decoding circuit [17], radio receiving transmitting module [18], multi-channel A/D, change-over circuit [19] constitutes, and is to adopt dtmf signal to carry out information exchange between main website and each substation.

The utility model is compared with existing system has following obvious improvement:

1, owing to adopted special-purpose DTMF coding-decoding circuit in the system, makes greatly letter of whole system soft and hardware design Change, reliability are significantly improved.

2, reduced system cost.

Claims

The wireless itinerant monitor system of a kind of oil production machine working condition system, it is made up of a main website and some substations, it is characterized in that: main website is by single-chip microcomputer (1), mimic panel display circuit (2), parallel interface expanded circuit (3), voice become circuit (4) entirely, dtmf signal coding circuit (5), dtmf signal decoding circuit (6), radio receiving transmitting module (7), microprinting (8), patrol and examine platform and count initialization circuit (9), calendar clock circuit (10), RS232 interface circuit (11) constitutes, RS232 interface circuit (11) and sound-compound-circuit (4) are connected on the serial communication interface of single-chip microcomputer (1), the DTMF letter decoding circuit (6) of dtmf signal coding circuit (5) is connected on the parallel interface expanded circuit (3), the data wire of calendar clock circuit (10) links to each other with single-chip microcomputer (1), substation is by single-chip microcomputer (12), address code circuit (13), parallel interface expanded circuit (14), variable connector amount signal input circuit (15), dtmf code circuit (16), DTMF decoding circuit (17), radio receiving transmitting module (18), multi-channel A/D change-over circuit (19) constitutes, dtmf signal coding circuit (16) and dtmf signal decoding circuit (17) are connected on the parallel interface expanded circuit (14), and are to adopt dtmf signal to carry out information exchange between main website and the substation.