CN2593287Y - Automatic display and recording device of multifunctional electricity meter - Google Patents

Abstract

The utility model relates to an automatic displaying and meter reading converting device of a multifunctional electric meter, which is composed of two parts of an automatically displaying part controlled by a single chip computer and a wireless transmitting receiver. The single chip computer uses an interface circuit to collect each data of the multifunctional electric meter. After the data are collected, the data are displayed on an LED by a driving circuit. The LED uses a red digital tube of high brightness and can be clearly observed beyond a plurality of meters. A wireless receiving and transmitting module and a CPU commonly use an electric source. Data reception and transmission are not controlled by the CPU and the operation is independent. A wireless meter reading function is guaranteed to be not influenced under the condition that a main control circuit has faults. The functional distance of radio frequency signals is in the range of 30 to 50 meters and thus other surrounding wireless devices can not be influenced. The utility model overcomes the defects of climbing requirements, eye observation, hand copy and other meter reading methods of a multifunctional meter.

Description

Multifunction electric meter shows automatically, meter copying device

Technical field

The utility model relates to the conversion equipment that a kind of multifunction electric meter shows automatically and checks meter, belong to ammeter and measure class.

Background technology

At home, generally speaking, three-phase multifunctional ammeter or critical point ammeter mostly be installed on the outdoor electric pole or transformer room or shop building metope on, be used for accurately measuring the positive and negative meritorious and parameters such as reactive power, electric current, magnitude of voltage, instantaneous power consumption of large user's electricity consumption, measurement parameter has several thousand, even more, its parameter obtain normally by climb, watch, write by hand or be sent to management of power use center by wired or infrared method.The former comparison danger of climbing, the naked eyes of checking meter by hand also may produce error, and electricity consumer sees that the power consumption of controlling oneself is difficult for, and electricity consumer is close to ammeter and also is unfavorable for anti-electricity-theft; The latter since infrared copy meter when distance surpasses 8 meters, infrared sending and receiving window be difficult for to aim at, all the year round dust block and outdoor light all can influence when strong and copies and accepts the correct of data, and check meter with the RS-485 bus, there be ditching time-consuming the taking a lot of work of sunkening cord, safeguard reasons such as inconvenience, wired and application infrared copy meter of RS-485 is very limited, and the automatic data logging and the science management of power use also are under some influence.

Summary of the invention

Goal of the invention of the present utility model is: the conversion equipment that provides a kind of ammeter to show automatically and check meter, overcome adopt the RS-485 bus to check meter to need ditching sunken cord and infrared copy meter when distance surpasses 8 meters, the sending and receiving window is difficult for the deficiency of aiming at.

Of the present utility modelly form by user interface circuit, single-chip microcomputer, selection circuit, display control circuit, display and radio receiving transmitting module, circuit, single-chip microcomputer also send difference connecting subscribers participating interface circuit and control signal from radio receiving transmitting module to the selection circuit is selected in the data acquisition command that single-chip microcomputer sends selecting after user interface circuit carries out level conversion, selects the input/output terminal of another termination multifunction electric meter of circuit; After single-chip microcomputer obtains replying of image data signal, promptly output signal to display control circuit, display control circuit is controlled the demonstration of display and is refreshed; After radio receiving transmitting module is received the data acquisition order, at first radiofrequency signal being converted to digital signal sends to be elected then and selects circuit, after radio receiving transmitting module obtains replying of image data signal, convert digital signal to radiofrequency signal again and send, corresponding receiving trap with the outside cooperates finishes the wireless automatic meter reading function.

Multifunction electric meter demonstration automatically, meter copying device and multifunction electric meter, the micropower less radio-frequency palm computer of checking meter, main platform electricity charge system forms reading transcribing system, multi-functional user is measured summary table install to nearby in the thief-proof casing on the house lead in electric pole, can effectively prevent electricity filching behavior; Be contained in the data in user's summary table in the electric pole eminence Box for avoiding fraudulent use of electricity, read by the RS-485 mouth, and show by the Single-chip Controlling high-brightness LED by radio receiving transmitting module of the present utility model.On the one hand, can observe the various data in the ammeter the Box for avoiding fraudulent use of electricity by LED below electric pole, general personnel can not contact or near table, play anti-electricity-theft effect.On the other hand, the meter reading personnel of power supply administration also needn't ascend a height unpacking, just the interior ammeter of inspection box has no abnormal at the scene, and can read the several data of ammeter in the table case through anti-electricity-theft radio switch by micro-power radio frequency with palmtop computer, be reported in the main platform electricity bill control system, thereby reach the purpose of metering.

In order to strengthen the brightness of display, display control circuit also adopts amplifying circuit, like this, according to designing requirement, when dynamically shown by Single-chip Controlling, can increase brightness, and dynamically demonstration also can reduce power consumption.Wireless receiving module and CPU common source, but transceive data is not subjected to the control of CPU, works alone, and guarantees that wireless meter reading function is unaffected under the situation of governor circuit fault, the operating distance of radiofrequency signal is in 30-50 rice scope, thus not can to around other wireless device impact.

Description of drawings

Fig. 1 is a block scheme of the present utility model.

Fig. 2 is a wiring diagram of the present utility model.

The U1-single-chip microcomputer; The U3-user interface circuit; U4, U5, U6-display control circuit; U7-selects circuit; The M1-radio receiving transmitting module; The Q1-Q8-triode; The DS1-DS8-charactron, Y1-crystal oscillator, U10-power supply monitoring circuit.

Embodiment

Single-chip microcomputer is selected for use: AT89055WD, the user interface chip is selected for use: MAX485, display control circuit: form by two 7404,8 triodes 9012 and 74AS138, charactron is selected for use: 8 LSD9056-10, radio receiving transmitting module is selected for use: RF401, the selection circuit chip is selected for use: 4502, and crystal oscillator is selected for use: 11.059MHZ, power supply monitoring circuit is selected for use: IMP801L.

Power unit adopts the electric supply system of the transformer of three 100W with triangular form method of attachment formation phase three-wire three 100V, and each transformer can independently provide+the 5V DC current to system behind voltage regulation filtering, and assurance device can operate as normal when phase shortage.

11,13,18 pin of single chip computer AT 89055WD meet 1 of user interface chip MAX485,4,2 pin, 20,21 connect the crystal-oscillator circuit that crystal oscillator 11.059MHZ and C1, C2 form, 10 pin connect power supply monitoring circuit, 38,39,40,41,42,43 pin connect 1,3,5,9,11,13 pin of one 7404 of display control circuit, 36,37 pin connect 1,3 pin of another piece 7404,24,25,26 3,2,1 pin that meet display control circuit 74AS138,10 pin of circuit 4502 are selected in 7 pin selectings; 14,5 pin of circuit 4502 are selected in 6, the 7 pin output selecting of MAX485, and 3,4 pin of radio receiving transmitting module RF401 connect 4502 12,1 pin, and 13,3 pin of selection circuit 4502 connect the output terminal of multifunction electric meter; The output 2,4,6,8,10,12 that display control circuit is one 7404 and the output 2,4 of another piece 7404 connect 7,6,4,2,1,9,10,5 pin of 8 display chip LSD9056-10 respectively; 5,4,3,2,1,0,9,7 pin of display control circuit 74AS138 connect the base stage of triode Q1-Q8 respectively, the grounded emitter of Q1-Q8, and collector connects 3 and 8 pin of display chip LSD9056-10 respectively.System's characteristics

1, follows DL/T645-1997 " multifunctional electric energy meter communication protocol ".

2, the palm PC that the multi-functional software of checking meter is housed is used in the work intellectuality of checking meter, and need not to import table number, can the various data of copy reading multifunction electric meter, and it is very convenient, quick to check meter.

3, highlighted charactron shows, is convenient to that check meter in the open air, meter reading.

4, three-phase supply is powered, but any one has the electricity operate as normal mutually.When system breaks down, the fault prompting is arranged, be convenient to safeguard.Performance index:

1, highlighted charactron shows, 5 meters of outdoor sight direct projections are visual.

2, the converter demonstration stops showing time: 4S; Follow and show time: 4S.

3, operating ambient temperature :-25-+55.

4, working environment relative humidity: 25-95%.

5, serviceable life 〉=10.

6, power consumption≤2W.

Claims (1)

1, a kind of automatic demonstration of multifunction electric meter, the conversion equipment of checking meter, it is made up of user interface circuit, single-chip microcomputer, selection circuit, display control circuit, display and radio receiving transmitting module, it is characterized in that: circuit is selected in the data acquisition command that single-chip microcomputer sends selecting after user interface circuit carries out level conversion, single-chip microcomputer also sends the control signal of difference connecting subscribers participating interface circuit or radio receiving transmitting module to the selection circuit, select the input/output terminal of another termination multifunction electric meter of circuit; After single-chip microcomputer obtains replying of image data signal, promptly output signal to display control circuit, display control circuit is controlled the demonstration of display and is refreshed; After radio receiving transmitting module is received the respective wireless data acquisition command, at first radiofrequency signal is converted to digital signal then selecting select circuit, after radio receiving transmitting module obtains replying of image data signal, convert digital signal to radiofrequency signal again and send, cooperate with corresponding receiving trap and finish the wireless automatic meter reading function.