CN204331911U - Intellectual water meter - Google Patents

Abstract

The utility model relates to water meter technical field, particularly relate to a kind of intellectual water meter, the counting circuit, LED, liquid crystal display circuit, MBUS telecommunication circuit, valve controling circuit, sampling feed circuit and the circuit of swiping the card that comprise single-chip microcomputer and be connected with described single-chip microcomputer respectively, described sampling feed circuit are connected with described valve controling circuit; Described sampling feed circuit comprise microswitch GHG1, microswitch GHG2, triode Q1, triode Q2, diode D1, diode D2, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5.Sampling feed circuit of the present utility model adopt event trigger mechanism, and namely usually do not power on, therefore power consumption is dormant state consumption, about about 250nA.

Description

Intellectual water meter

Technical field

The utility model relates to water meter technical field, particularly relates to a kind of intellectual water meter.

Background technology

Current domestic domestic water supply and group's use water adopt traditional mechanical water meter measurement substantially, the mode of tabling look-up of manually registering one's residence.Along with day by day improving of living standards of the people and advancing by leaps and bounds of urban construction level, what adopt for many years first charges with after water, in addition the behindhand type of manual metering, causes human and material resources, temporal waste to administrative authority, and work efficiency is also very low.IC-card technology is by promotion and application widely in recent years, utilizes IC-card intellectual water meter, can complete the functions such as automatic management, pre-payment, is also convenient to adopt advanced microelectric technique and the complete water metering payment management system of the supporting application form of microcomputer.

The long-term display mode of some employing liquid crystal of existing IC-card water meter, although power consumption requirements can be met during the theory calculate life-span, according to the actual operation situation of China, without the necessity of carrying out long-term display, power consumption is large, causes water meter battery premature failure.

Utility model content

The purpose of this utility model is the deficiency overcoming above-mentioned technology, and provides a kind of intellectual water meter, low-power consumption, and power consumption is low.

The utility model for achieving the above object, by the following technical solutions: a kind of intellectual water meter, the counting circuit, LED, liquid crystal display circuit, MBUS telecommunication circuit, valve controling circuit, sampling feed circuit and the circuit of swiping the card that comprise single-chip microcomputer and be connected with described single-chip microcomputer respectively, described sampling feed circuit are connected with described valve controling circuit, described sampling feed circuit comprise microswitch GHG1, microswitch GHG2, triode Q1, triode Q2, diode D1, diode D2, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, the positive pole of battery respectively with one end of described microswitch GHG1, the emitter of triode Q1 connects, the collector of described triode is connected with power output end positive pole VCC, the base stage of described triode Q2 is connected with the collector of described triode Q2, the base stage of described triode Q2 respectively with resistance R3, resistance R4, one end of electric capacity C3 connects, the emitter of described triode Q2 is connected with one end of described resistance R5, and the other end of described resistance R5 is connected with the other end of resistance R4, the other end of electric capacity C3 and ground wire respectively, the other end of described microswitch GHG1 is connected with one end of described microswitch GHG2 and one end of electric capacity C1 respectively, the other end of described microswitch GHG2 is connected with the positive pole of described diode D2, the negative pole of described diode D2 is connected with one end of described electric capacity C2, resistance R1 respectively, the other end of described electric capacity C2, resistance R1 is connected with described resistance R2 and ground wire respectively, the other end of described resistance R2 is connected with the other end of described electric capacity C1 and the positive pole of described diode D1 respectively, and the negative pole of described diode D1 is connected with the other end of described resistance R3.

Described single-chip microcomputer adopts AT89C2051-12PI.

The beneficial effects of the utility model are: sampling feed circuit of the present utility model adopt event trigger mechanism, and namely usually do not power on, therefore power consumption is dormant state consumption, about about 250nA.Adopt three class event triggered fashion, " timed events " that occur when " counting event " that namely occur during tongue tube adhesive, " the plug-in card event " that occur when carrying out card operation and the timing being preset in calendar clock chip are waken up noisy.When there is this three classes event, telemetry circuit powers on voluntarily, processes by the preset course of work, terminates rear power themselves down.Use regimen condition according to resident, need about 0.3 second ~ 1 minute general every day of the time of telemetry circuit work not.Power consumption is low, saves the power consumption of battery, improves the serviceable life of battery.

Accompanying drawing explanation

Fig. 1 is schematic diagram of the present utility model;

Fig. 2 is the schematic diagram adopting feed circuit in the utility model.

Embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing and preferred embodiment.As depicted in figs. 1 and 2, a kind of intellectual water meter, the counting circuit, LED, liquid crystal display circuit, MBUS telecommunication circuit, valve controling circuit, sampling feed circuit and the circuit of swiping the card that comprise single-chip microcomputer and be connected with described single-chip microcomputer respectively, described sampling feed circuit are connected with described valve controling circuit, described sampling feed circuit comprise microswitch GHG1, microswitch GHG2, triode Q1, triode Q2, diode D1, diode D2, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, the positive pole of battery respectively with one end of described microswitch GHG1, the emitter of triode Q1 connects, the collector of described triode is connected with power output end positive pole VCC, the base stage of described triode Q2 is connected with the collector of described triode Q2, the base stage of described triode Q2 respectively with resistance R3, resistance R4, one end of electric capacity C3 connects, the emitter of described triode Q2 is connected with one end of described resistance R5, and the other end of described resistance R5 is connected with the other end of resistance R4, the other end of electric capacity C3 and ground wire respectively, the other end of described microswitch GHG1 is connected with one end of described microswitch GHG2 and one end of electric capacity C1 respectively, the other end of described microswitch GHG2 is connected with the positive pole of described diode D2, the negative pole of described diode D2 is connected with one end of described electric capacity C2, resistance R1 respectively, the other end of described electric capacity C2, resistance R1 is connected with described resistance R2 and ground wire respectively, the other end of described resistance R2 is connected with the other end of described electric capacity C1 and the positive pole of described diode D1 respectively, and the negative pole of described diode D1 is connected with the other end of described resistance R3.Described single-chip microcomputer adopts AT89C2051-12PI.

Sampling feed circuit schematic diagram as shown in Figure 2.In fig. 2, Q1 and Q2 forms on-off circuit, controls powering on and power down of control and testing board.When making GHG1 adhesive that namely sample event occurs with water, then start the charging process of C1, charging current makes switches set conducting power on, and completes sample count function.Just C1 is made to discharge when continuation water makes GHG2 adhesive, so that effective when sample event next time occurs.Design like this can prevent the frequent suction of the GHG1 caused by hydraulic pressure instability from putting and error count.The another one effect of C1 is: even if the long-term adhesive of GHG1 also can keep control and testing board to be in power failure state, ensures low power capabilities.The effect of C3 suppresses the mechanical shaking of GHG1 on the impact of counting.The effect of C2 provides another road trigger pulse when not yet interdischarge interval suffers that magnetic is attacked C1 is full of electricity, control and testing board powered on to carry out valve-off, work such as record magnetic attack time and number of times etc.Visible through above-mentioned analysis, the electric capacity that C1, C2 should select leakage current little as far as possible, to improve the serviceability of module.

Control circuit is the core of system, considers that the size of program has selected AT89C51 single-chip microcomputer.It forms reset circuit by crystal oscillating circuit and touch key and forms, and mainly realizes the controlling functions to peripheral circuit, makes the work that each modular circuit is normally orderly.

Crystal oscillating circuit is in conjunction with the circuit of single-chip microcomputer inside, and produce the necessary clock frequency of single-chip microcomputer, effect is for system provides basic clock signal.

The effect of reset circuit of SCM makes the reset operation of single-chip microcomputer make single-chip microcomputer enter init state, in the design is reset by key level, namely when circuit is in the middle of running, unclamps after pressing reset key, RST can be made to be the high level of a period of time, thus to realize the operation that resets.

Swipe the card circuit, it mainly completes the read-write operation of radio frequency card (MIFARE 1 blocks).The Transistor-Transistor Logic level that RS232 level conversion is identified for single-chip microcomputer by serial port level chance-over circuit after reading and writing by H6152 read write line radio frequency card, thus achieve use AT89C51 single-chip microcomputer to control the read-write process of radio-frequency card.Hardware circuit is made up of one-chip computer module, serial port level conversion module and H6152 module for reading and writing 3 partial circuit.

Liquid crystal display circuit is used at man-machine interface feedback information, forms primarily of Liquid Crystal Module.The full dot matrix graphic liquid crystal of GXM12864 of the band KS0108B controller having selected Low-Power CMOS technology to realize in hardware design, the P0 mouth of AT89C51 is directly connected with the data bus DB0 ~ DB7 of Liquid Crystal Module; 0,1,3,5,6 pins of P2 mouth respectively with Liquid Crystal Module /CSB ,/CSA, E, R/W, D/I be connected, and in Single Chip Microcomputer (SCM) program implementation, does corresponding control to their.The display of optional position to LCDs, roll display and the anti-function such as aobvious can be realized by programming.

Counting circuit, native system adopts the Low-Power CMOS serial EEPROM chip AT24C01 of American ATMEL, it includes 256x8 position storage space, has operating voltage wide (2.5 ~ 5.5 V), erasablely (is greater than 10 000 times) often, the feature such as writing speed fast (being less than 10 ms).Utilize AT89C51 system and 24C01 to carry out I2C to communicate, realize the read/write verification operation to data in a certain address.

Valve controling circuit, pulse-controlled electromagnetic valve selected by solenoid valve, and this solenoid valve only need add a direct impulse (amplitude DC12 V width is greater than 20 ms) when opening at its control line AB two ends, and water valve, once open, can keep automatically.Then add a reverse impulse at AB two ends when turning off, water valve will cut out.Because this solenoid valve does not need to solenoid valve continued power after opening, so its power consumption is very low, is thus particularly suitable for being used in IC-card water meter and opens as water meter the performance element sending water or arrearage to cut off the water.Circuit design adopts multiway analog switch be combined into one group of double-point double-throw switch, under the control of AT89C51, positive pulse or negative pulse are added to the control line AB two ends of solenoid valve.

The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (2)

1. an intellectual water meter, the counting circuit, LED, liquid crystal display circuit, MBUS telecommunication circuit, valve controling circuit, sampling feed circuit and the circuit of swiping the card that comprise single-chip microcomputer and be connected with described single-chip microcomputer respectively, described sampling feed circuit are connected with described valve controling circuit, described sampling feed circuit comprise microswitch GHG1, microswitch GHG2, triode Q1, triode Q2, diode D1, diode D2, electric capacity C1, electric capacity C2, electric capacity C3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, the positive pole of battery respectively with one end of described microswitch GHG1, the emitter of triode Q1 connects, the collector of described triode is connected with power output end positive pole VCC, the base stage of described triode Q2 is connected with the collector of described triode Q2, the base stage of described triode Q2 respectively with resistance R3, resistance R4, one end of electric capacity C3 connects, the emitter of described triode Q2 is connected with one end of described resistance R5, and the other end of described resistance R5 is connected with the other end of resistance R4, the other end of electric capacity C3 and ground wire respectively, the other end of described microswitch GHG1 is connected with one end of described microswitch GHG2 and one end of electric capacity C1 respectively, the other end of described microswitch GHG2 is connected with the positive pole of described diode D2, the negative pole of described diode D2 is connected with one end of described electric capacity C2, resistance R1 respectively, the other end of described electric capacity C2, resistance R1 is connected with described resistance R2 and ground wire respectively, the other end of described resistance R2 is connected with the other end of described electric capacity C1 and the positive pole of described diode D1 respectively, and the negative pole of described diode D1 is connected with the other end of described resistance R3.

2. intellectual water meter according to claim 1, is characterized in that: described single-chip microcomputer adopts AT89C2051-12PI.