CN202929744U - Circuit module for water gauge - Google Patents
Circuit module for water gauge Download PDFInfo
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- CN202929744U CN202929744U CN 201220572830 CN201220572830U CN202929744U CN 202929744 U CN202929744 U CN 202929744U CN 201220572830 CN201220572830 CN 201220572830 CN 201220572830 U CN201220572830 U CN 201220572830U CN 202929744 U CN202929744 U CN 202929744U
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- interface circuit
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Abstract
The utility model relates to a circuit module for a water gauge, which comprises a power supply interface circuit, a wake-up power-on circuit, a signal gate circuit, a display circuit, a valve interface circuit, a valve driving circuit, an on-line programming interface circuit, a sampling interface circuit, an IC (Integrated Circuit) card interface circuit, an IC card power supply control circuit, a clock frequency generation circuit, an ESAM (Embedded Secure Access Module) circuit, an LED (Light-emitting Diode) indicator lamp circuit, a voltage stabilizing circuit, a two-stage voltage detection circuit, a clock chip circuit and a main chip circuit, wherein the wake-up power-on circuit is electrically connected with the signal gate circuit; the power supply interface circuit, the wake-up power-on circuit, the signal gate circuit, the display circuit, the valve interface circuit, the valve driving circuit, the on-line programming interface circuit, the sampling interface circuit, the IC card interface circuit, the IC card power supply control circuit, the clock frequency generation circuit, the ESAM circuit, the LED indicator lamp circuit, the voltage stabilizing circuit, the two-stage voltage detection circuit, and the clock chip circuit are electrically connected with the main chip circuit. The circuit module has the following characteristics that 1, voltage detection is wide; 2, an operating state of the water gauge or a possible existing failure is indicated quickly; and 3, function definition and extension can be conducted conveniently.
Description
Technical field
The utility model relates to circuit module, relates in particular to the circuit module for water meter.
Background technology
Intellectual water meter is present popular a kind of meter tool on water measurement instrument market, with respect to traditional stem-winder tool, thereby intellectual water meter has increased the intellectuality that parts that CPU etc. can realize robotization, intelligent computing have been realized the water metering management, has also increased security and accuracy that special ESAM (embedded safe control module) safety chip is used for realizing metering.But the existing water meter of ESAM safety chip or other the common water meters of having used all faces a problem: can't judge fast the running status or the malfunction that detect water meter, for example the user can't know fast when using water meter whether the water yield of oneself using has surpassed rated capacity, the slip-stick artist can't locate the source of failure fast when water meter goes wrong after sale, and this has increased the trouble in use and product maintenance.
Summary of the invention
For the problems referred to above, the utility model discloses a kind of circuit module for water meter, have following technical progress: 1. used the ESAM module, increased the security of data of water meter and authentication information; 2. use two-stage voltage detecting circuit, voltage stabilizing chip, guaranteed reference voltage detection and the voltage adaptation of table tool; 3. used the LED light circuit, can allow user and maintenance personal can learn state and problem that water meter is current by the corresponding relation of the flicker of predefined LED lamp, color, brightness etc. and water meter state at a glance.
For achieving the above object, the utility model is achieved through the following technical solutions:
the circuit module that is used for water meter, by power interface circuit, wake electrification circuit up, the signal gating circuit, display circuit, the valve interface circuit, valve driving circuit, the online programming interface circuit, sampling interface circuit, the IC-card interface circuit, the IC-card power control circuit, clock generation circuit, the ESAM modular circuit, the LED light circuit, mu balanced circuit, the two-stage voltage detecting circuit, the clock chip circuit, the master chip circuit, wherein waking electrification circuit up is electrically connected to the signal gating circuit, power interface circuit, wake electrification circuit up, the signal gating circuit, display circuit, the valve interface circuit, valve driving circuit, the online programming interface circuit, sampling interface circuit, the IC-card interface circuit, the IC-card power control circuit, clock generation circuit, the ESAM modular circuit, the LED light circuit, mu balanced circuit, the two-stage voltage detecting circuit, the clock chip circuit all is electrically connected on the master chip circuit.
Wherein, described power interface circuit is provided with the power supply input port and is connected with external power source, and power input interface is provided with diode.By adopting diode to do isolation, can effectively prevent reverse power connection, improve the security of circuit.
Wherein, the signal gating circuit, wake electrification circuit up and be respectively equipped with three groups of corresponding signaling interfaces, be used for realizing the activation that wakes electrification circuit up.It is interim that both passes are that signal gating circuit at least one signal in three road signals comes, and can activate the above-mentioned electrification circuit that wakes up, thus singlechip CPU start working, then to draw current by scanning be which signal arrives to single-chip microcomputer, then make corresponding processing.Set low signal gating and come linking of cut-off signal and single-chip microcomputer when signal is finished dealing with, guarantee the reliable power down of power supply; The described electrification circuit that wakes up is used for realizing that following function: CPU is stuck in without any signal (for example plug-in card signal, sampled signal, power-off signal etc.) is in power-down state temporarily, and power consumption is 0; Wake electrification circuit up and make circuit turn-on to capacitor charging when having signal, make whole CPU card single-chip microcomputer power on, lock simultaneously power on signal.
Wherein, described display circuit is connected with the display screen of table on tool, and this circuit is directly connected the displaying contents of exporting to the display device propelling movement master chip circuit of showing on body with programmed control by the master chip circuit.
Wherein, the valve driving machine of the by-pass valve control on valve interface circuit, valve driving circuit and water meter is electrically connected to.The valve interface circuit is used for the test valve signal that puts in place, and described valve driving circuit is used for the rotating of by-pass valve control motor, thereby controls the switch of water meter valve, indirectly control user water.
Wherein, the online programming interface circuit be provided with a plurality of can with the circuit terminal of extraneous computing machine or upper machine communication, can realize by the online programming interface circuit expansion and the change revision of his-and-hers watches tool function, can define simultaneously the corresponding relation of data mode, element state in LED lamp and table by this circuit, be convenient to the color of different states and LED lamp, brightness, flicker etc. are mapped.
Wherein, described sampling interface circuit directly and the sampled signal communication on water meter is realized the water meter pulse signal detection.
Wherein, described IC-card interface circuit, IC-card power control circuit are electrically connected to IC-card deck on the Water meter tool, the IC-card interface circuit is used for realizing the access of IC-card, and the IC-card power control circuit is used for giving the card power down when CPU master chip is finished dealing with when card signal being detected temporarily to the card power supply.
Wherein, clock generation circuit, clock chip circuit provide clock signal for the IC-card on the table tool, ESAM module etc.Clock chip circuit wherein is used for utilizing communicating by letter between clock chip and single-chip microcomputer, makes single-chip microcomputer obtain the real-time clock information of standard; Clock generation circuit wherein is used for providing clock signal to IC-card, ESAM, and the actual frequency scope of clock signal can be different frequencies during reset answer, and for example usually used is the clock frequency of 1～5MHz.
Wherein, the ESAM modular circuit has increased the encrypting and authenticating ability for the table tool, it is inner that this module is fixedly mounted on the card table, all important parameters in storage card table operational process, mutually authenticate and message exchange by ESAM module and subscriber card in water meter, there are many manufacturers that this generic module of plurality of specifications is provided on market, all can be used for the utility model, for example this series products of common Beijing Watchdata's data.
Wherein, the LED light circuit is electrically connected to LED lamp on the Water meter tool, controls the luminous of LED according to the instruction that the master chip circuit sends.
Wherein, mu balanced circuit is used to the master chip circuit that stable voltage is provided, and for the adverse effect that prevents that the external circuitry overtension from causing, described mu balanced circuit is provided with the voltage that power module of voltage regulation is used for stablizing the master chip circuit.Externally in the situation of voltage higher than 3V, power module of voltage regulation makes the stable operating voltage of single-chip microcomputer at 3.3V.
Wherein, described two-stage voltage detecting circuit is provided with voltage checking chip and detects voltage, is provided with triode and obtains the two-stage voltage detecting.
Wherein, the master chip circuit claims again single-chip microcomputer, CPU etc., is used for controlling whole circuit module work, especially can directly control the displaying contents of liquid crystal.
Description of drawings
Fig. 1 is the structural drawing of the utility model circuit module;
Fig. 2-Figure 18 is power interface circuit, wake the component structure figure of electrification circuit, signal gating circuit, display circuit, valve interface circuit, valve driving circuit, online programming interface circuit, sampling interface circuit, IC-card interface circuit, IC-card power control circuit, clock generation circuit, ESAM modular circuit, LED light circuit, mu balanced circuit, two-stage voltage detecting circuit, clock chip circuit, master chip circuit up.
Embodiment
With reference to figure 1, circuit module of the present utility model, power interface circuit, wake electrification circuit, signal gating circuit, display circuit, valve interface circuit, valve driving circuit, online programming interface circuit, sampling interface circuit, IC-card interface circuit, IC-card power control circuit, clock generation circuit, ESAM modular circuit, LED light circuit, mu balanced circuit, two-stage voltage detecting circuit, clock chip circuit up and all be electrically connected to the master chip circuit, wherein wake electrification circuit up and be electrically connected to the signal gating circuit.
With reference to figure 2, be power interface circuit, adopt power input interface JDY-DY1, interface is provided with and adopts diode D2 (model IN5819) to do isolation, prevents reverse power connection.
With reference to figure 3, for waking electrification circuit up, charging makes triode V80 conducting to electric capacity (CS81, C82, C83) when having signal, and the master chip circuit powers on, and locks power on signal by SD simultaneously.
With reference to figure 4, be the signal gating circuit, a signal in KA, CAI1, CAI2 comes interim, will activate the above-mentioned electrification circuit that wakes up, thereby single-chip microcomputer is started working, then single-chip microcomputer sets high XHK, and drawing current by scanning KW, CA1, CA2 is which signal arrives, then makes corresponding processing.Set low signal gating XHK and come linking of cut-off signal and single-chip microcomputer when signal is finished dealing with, guarantee the reliable power down of power supply.
With reference to figure 5, be display circuit, be electrically connected to exterior display screen by a plurality of screen line stitch.
With reference to figure 6, be the valve interface circuit, directly be connected with valve at JD1-JA, by-pass valve control motor, the test valve signal that puts in place.
With reference to figure 7, be valve driving circuit, come the rotating of by-pass valve control motor by bridge circuit, thereby control the switch of water meter valve, indirectly control user water.
With reference to figure 8, be the online programming interface circuit, give new function thereby can be connected with upper machine communication, the interface section is positioned at JZ1-ZXBC.
With reference to figure 9, be sampling interface circuit, directly be connected with sampled signal at JG1-FX, detect the pulse signal of water meter.
With reference to Figure 10, be the IC-card interface circuit, directly be connected with deck by a plurality of pin contacts at J4-K, control signal adds draws resistance R 51, R52, R53.
With reference to Figure 11, be the IC-card power control circuit, rely on triode T68 to connect and disconnect, when card signal being detected temporarily to the card power supply, when finishing dealing with, gives by card the card power down.
With reference to Figure 12, be clock generation circuit, generate the output of two-way frequency by the 74HCO2 crystal oscillator.
With reference to Figure 13, be the ESAM circuit module, be used for the data in the black list tool.
With reference to Figure 14, be the LED light circuit, be used for to control lighting with luminous of the LED (D100) that is positioned on the Water meter tool.
With reference to Figure 15, be mu balanced circuit, external voltage makes the stable operating voltage of single-chip microcomputer at 3.3V with power module of voltage regulation MD7333 during higher than 3V.
With reference to Figure 16, for the two-stage voltage detecting circuit, for detection of external voltage, MD7024 detects by detection chip, when voltage during lower than 2.4V, and the MD7024 output low level.BJ1 can obtain the two-stage voltage detecting by controlling triode switch.
With reference to Figure 17, be clock chip circuit PCF8573, the real time data that is used for IC-card and master chip circuit is mutual.
With reference to Figure 18, be the master chip circuit, adopt other circuit of PIC16F946 Single-chip Controlling.
Claims (9)
1. be used for the circuit module of water meter, it is characterized in that by power interface circuit, wake electrification circuit up, the signal gating circuit, display circuit, the valve interface circuit, valve driving circuit, the online programming interface circuit, sampling interface circuit, the IC-card interface circuit, the IC-card power control circuit, clock generation circuit, the ESAM modular circuit, the LED light circuit, mu balanced circuit, the two-stage voltage detecting circuit, the clock chip circuit, the master chip circuit, wherein waking electrification circuit up is electrically connected to the signal gating circuit, power interface circuit, wake electrification circuit up, the signal gating circuit, display circuit, the valve interface circuit, valve driving circuit, the online programming interface circuit, sampling interface circuit, the IC-card interface circuit, the IC-card power control circuit, clock generation circuit, the ESAM modular circuit, the LED light circuit, mu balanced circuit, the two-stage voltage detecting circuit, the clock chip circuit all is electrically connected on the master chip circuit.
2. circuit module according to claim 1 is characterized in that described power interface circuit is provided with the power supply input port and is connected with external power source, and power input interface is provided with diode.
3. circuit module according to claim 1 is characterized in that described signal gating circuit, wakes electrification circuit up and be respectively equipped with three groups of corresponding signaling interfaces, is used for realizing the activation that wakes electrification circuit up.
4. circuit module according to claim 1 is characterized in that described display circuit is connected with display screen on the Water meter tool.
5. circuit module according to claim 1 is characterized in that the valve driving machine of the by-pass valve control on described valve interface circuit, valve driving circuit and Water meter tool is electrically connected to.
6. circuit module according to claim 1 is characterized in that described IC-card interface circuit, IC-card power control circuit are electrically connected to IC-card deck on the Water meter tool.
7. circuit module according to claim 1 is characterized in that described LED light circuit is electrically connected to LED lamp on the Water meter tool.
8. circuit module according to claim 1, is characterized in that described mu balanced circuit is provided with power module of voltage regulation.
9. circuit module according to claim 1, is characterized in that described two-stage voltage detecting circuit is provided with voltage checking chip and detects voltage, is provided with triode and obtains the two-stage voltage detecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572830 CN202929744U (en) | 2012-11-02 | 2012-11-02 | Circuit module for water gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220572830 CN202929744U (en) | 2012-11-02 | 2012-11-02 | Circuit module for water gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202929744U true CN202929744U (en) | 2013-05-08 |
Family
ID=48219682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220572830 Expired - Lifetime CN202929744U (en) | 2012-11-02 | 2012-11-02 | Circuit module for water gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202929744U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627221A (en) * | 2018-04-12 | 2018-10-09 | 芜湖职业技术学院 | Water meter power supply metering indicating circuit |
-
2012
- 2012-11-02 CN CN 201220572830 patent/CN202929744U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627221A (en) * | 2018-04-12 | 2018-10-09 | 芜湖职业技术学院 | Water meter power supply metering indicating circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 102400 Fangshan District Baiyang Lu 2, 1 buildings -1 to 3 tier 101, Beijing Patentee after: JOYO ZHONGKE TECHNOLOGY Co.,Ltd. Address before: 102400 1-026, Cui Liu East Street, Changhong West Road, Liangxiang, Fangshan District, Beijing. Patentee before: BEIJING JOYO SMART WATER METER CO.,LTD. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
|
| CX01 | Expiry of patent term |