CN103033227B - Flow detection application specific integrated circuit - Google Patents
Flow detection application specific integrated circuit Download PDFInfo
- Publication number
- CN103033227B CN103033227B CN201210541102.5A CN201210541102A CN103033227B CN 103033227 B CN103033227 B CN 103033227B CN 201210541102 A CN201210541102 A CN 201210541102A CN 103033227 B CN103033227 B CN 103033227B
- Authority
- CN
- China
- Prior art keywords
- unit
- pins
- pin
- connect
- reset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
It is an object of the invention to provide one and do not use software, but all adopt the application specific integrated circuit being specifically designed to detection liquid or gas flow of hardware logic control, it is characterised in that: comprise Traffic Anomaly solution lock unit (U1), instruction reception unit (U2), drive and control of electric machine unit (U3), magnetic interference and tear table detecting unit (U open4), communication line detecting unit (U5), motor overload detecting unit (U6), battery voltage detection unit (U7), counting switch fault detection and impulse generating unit (U8), under meter counting unit (U9), system clock selecting unit (U10) and data transmission unit (U11). After adopting application specific integrated circuit of the present invention to make flow detection electronic installation, avoid in this kind of electronic installation and use micro-chip, it does not have operating software, all adopt hardware logic control, there is very high long-time running reliability.
Description
Technical field
The present invention relates to a kind of unicircuit, particularly a kind of application specific integrated circuit being specifically designed to detection liquid or gas flow.
Background technology
Along with the fast development of electronic information technology, many traditional flow instrumentations are by increasing electronic installation, it is achieved that the informationization of instrument and intellectuality. Such as, for the water meter of huge numbers of families, indicator installs magnet additional, and two dry-reed tubes are installed near this indicator, flow information can be extracted, increase flow detection electronic installation on this basis and just can make various intelligentized water meter. Such as card water meter, radio measurement and control water meter, wired observing and controlling water meter etc. At present, the core component of this kind of water meter electronic installation nearly all adopts one-chip computer chip, realizes collection, process to water meter information by hardware and software and realizes various management function. Owing to running software also exists the problem of inefficacy, although being all configured with, in major part micro-chip, dog circuit of guarding the gate, but the fault that software program race flies can not thoroughly be eradicated. If the special chip of hardware logic control all can be adopted with dedicated IC chip, as the core component of flow detection electronic installation, then the problem that software can be avoided to lose efficacy, improves the serviceability of this kind of electronic installation greatly.
Summary of the invention
It is an object of the invention to provide one and do not use software, but all adopt the application specific integrated circuit being specifically designed to detection liquid or gas flow of hardware logic control.
The present invention specifically provides flow detection application specific integrated circuit, it is characterised in that: comprise Traffic Anomaly solution lock unit U1, instruction reception unit U2, drive and control of electric machine unit U3, magnetic interference and tear table detecting unit U open4, communication line detecting unit U5, motor overload detecting unit U6, battery voltage detection unit U7, counting switch fault detection and impulse generating unit U8, under meter counting unit U9, system clock selecting unit U10With data transmission unit U11;
Wherein, Traffic Anomaly solution lock unit U1During for flow detection exception, to drive and control of electric machine unit U3Send the motor drive signal of valve-off and receive and get rid of the unlocking signal after extremely;
Instruction reception unit U2For receiving the communication instruction from outside, and send executive signal according to instruction to other unit;
Drive and control of electric machine unit U3The motor closing or opening valve for driving;
Magnetic interference and tear table detecting unit U open4For detecting the working condition of outside anomalous field interference flow detection dry-reed tube, and detect the working condition of tamper table switch, as found exception, then to drive and control of electric machine unit U3Send the motor drive signal of valve-off, and recording exceptional state;
Communication line detecting unit U5Whether normal for detecting communication line, as found line fault, then record trouble state;
Motor overload detecting unit U6When detection is closed and opens valve, whether current of electric transships, as found overload, then immediately to drive and control of electric machine unit U3Send the signal stopping machine operation, and record overload;
Battery voltage detection unit U7Whether normal for detecting backup battery voltage, as on the low side in found cell voltage, then record Lower state;
Counting switch fault detection and impulse generating unit U8Whether normal and produce metering pulse for detecting counting switch work, as found counting switch operation irregularity, then recording exceptional state;
Under meter counting unit U9For flow counting, when external command sends data on flows, then data transfer of data is sent unit U11, send for data;
System clock selecting unit U10For generation and the selection of system clock;
Data transmission unit U11Send for data.
Flow detection application specific integrated circuit of the present invention, it is characterised in that: Traffic Anomaly solution lock unit U1, instruction reception unit U2, drive and control of electric machine unit U3, magnetic interference and tear table detecting unit U open4, communication line detecting unit U5, motor overload detecting unit U6, battery voltage detection unit U7, counting switch fault detection and impulse generating unit U8, under meter counting unit U9With system clock selecting unit U10It is interconnected between this; Instruction reception unit U2, system clock selecting unit U10, data transmission unit U11It is interconnected between this three (its theory of constitution block diagram is as shown in Figure 1).
Flow detection application specific integrated circuit of the present invention, it is characterised in that: described unicircuit adopts the encapsulation of LQFP48 type, has 48 pins, wherein Traffic Anomaly solution lock unit U1With 21 pin UNLOCK, 17 pin RESET connect;
Instruction reception unit U2With 11 pin CMDCP, 12 pin GT, 9 pin ENCP connect;
Drive and control of electric machine unit U3With 17 pin RESET, 24 pin NSW1,26 pin NSW0,29 pin VB, 28 pin OPEN, 30 pin NOPEN, 32 pin CLOSE, 33 pin NCLOSE connect;
Magnetic interference and tear table detecting unit U open4With 46 pin G1B, 47 pin G1,44 pin G2B, 45 pin G2,37 pin GC, 39 pin HGB, 41 pin HG, 17 pin RESET connect;
Communication line detecting unit U5With 11 pin CMDCP, 17 pin RESET, 13 pin WIRE connect;
Motor overload detecting unit U6With 34 pin MOTEB, 36 pin MOTE, 17 pin RESET connect;
Battery voltage detection unit U7With 23 pin VBE, 17 pin RESET connect;
Counting switch fault detection and impulse generating unit U8With 46 pin G1B, 47 pin G1,44 pin G2B, 45 pin G2,37 pin GC, 24 pin NSW1,17 pin RESET connect;
Under meter counting unit U9Connect with 17 pin RESET;
System clock selecting unit U10With 1 pin SEL, 7 pin CLK1,5 pin CLK2,3 pin CLK3,9 pin ENCP connect;
Data transmission unit U11With 17 pin RESET, 9 pin ENCP, 15 pin CPOUT, 24 pin NSW1,26 pin NSW0 connect.
Flow detection application specific integrated circuit of the present invention can adopt LQFP48 type to encapsulate, and has 48 pins, except the connection relation of each pin of having illustrated and circuit inside, and residue 2,4,6,8,10,14,16,20,22,25,27,31,35,38,40,48 totally 16 free non-use of pin, mark with symbol NC figure is inner.
Its model of flow detection application specific integrated circuit of the present invention is DX0601 type. The DX0601 type application specific integrated circuit of the present invention is adopted to make flow detection electronic installation, there is no operating software, all adopt hardware logic control, the software failure problems using micro-chip to occur in flow detection electronic installation can be avoided, there is very high long-time running reliability, thus there is significant technical progress.
Accompanying drawing explanation
Fig. 1 is theory of constitution block diagram of the present invention.
Fig. 2 is that the present invention forms structure block diagram.
Fig. 3 is Traffic Anomaly solution lock unit U1Logical circuit figure.
Fig. 4 is instruction reception unit U2Logical circuit figure.
Fig. 5 is drive and control of electric machine unit U3Logical circuit figure.
Fig. 6 is magnetic interference and tears table detecting unit U open4Logical circuit figure.
Fig. 7 is communication line detecting unit U5Logical circuit figure.
Fig. 8 is motor overload detecting unit U6Logical circuit figure.
Fig. 9 is battery voltage detection unit U7Logical circuit figure.
Figure 10 is counting switch fault detection and impulse generating unit U8Logical circuit figure.
Figure 11 is under meter counting unit U9Logical circuit figure.
Figure 12 is system clock selecting unit U10Logical circuit figure.
Figure 13 is data transmission unit U11Logical circuit figure.
Figure 14 is Fig. 4 U2The logical circuit figure of JCNT24 in unit.
Figure 15 is Figure 10 U8The logical circuit figure of GHG in unit.
Figure 16 is Figure 11 U9The logical circuit figure of ADD16 in unit.
Figure 17 is Figure 12 U10The logical circuit figure of ADD8 in unit.
Figure 18 is Figure 13 U11In unit, SUB8(has 3) logical circuit figure.
Figure 19 is encapsulation and the pin size figure of the present embodiment 1 circuit.
Figure 20 is the theory of constitution block diagram adopting unicircuit of the present invention to form flow detection electronic installation.
Figure 21 is the schematic circuit diagram adopting unicircuit of the present invention to form flow detection electronic installation.
Embodiment
Below in conjunction with accompanying drawing in detail technical solution of the present invention is described in detail.
Embodiment 1
As shown in Figure 1, in the theory of constitution of the present invention, comprise Traffic Anomaly solution lock unit U1, instruction reception unit U2, drive and control of electric machine unit U3, magnetic interference and tear table detecting unit U open4, communication line detecting unit U5, motor overload detecting unit U6, battery voltage detection unit U7, counting switch fault detection and impulse generating unit U8, under meter counting unit U9, system clock selecting unit U10With data transmission unit U11; Wherein Traffic Anomaly solution lock unit U1, instruction reception unit U2, drive and control of electric machine unit U3, magnetic interference and tear table detecting unit U open4, communication line detecting unit U5, motor overload detecting unit U6, battery voltage detection unit U7, counting switch fault detection and impulse generating unit U8, under meter counting unit U9With system clock selecting unit U10It is interconnected between this; Instruction reception unit U2, system clock selecting unit U10, data transmission unit U11It is interconnected between this three.
Traffic Anomaly solution lock unit U1During for flow detection exception, to drive and control of electric machine unit U3Send the motor drive signal of valve-off and receive get rid of abnormal after unlocking signal, it and 21 pin UNLOCK, 17 pin RESET connect (as shown in Figure 2); Instruction reception unit U2For receiving the communication instruction from outside, and sending executive signal according to instruction to other unit, it and 11 pin CMDCP, 12 pin GT, 9 pin ENCP connect; Drive and control of electric machine unit U3Closing or open the motor of valve for driving, it and 17 pin RESET, 24 pin NSW1,26 pin NSW0,29 pin VB, 28 pin OPEN, 30 pin NOPEN, 32 pin CLOSE, 33 pin NCLOSE connect; Magnetic interference and tear table detecting unit U open4For detecting the working condition of outside anomalous field interference flow detection dry-reed tube and detect the working condition of tamper table switch, as found exception, then to drive and control of electric machine unit U3Sending the motor drive signal of valve-off, and recording exceptional state, it and 46 pin G1B, 47 pin G1,44 pin G2B, 45 pin G2,37 pin GC, 39 pin HGB, 41 pin HG, 17 pin RESET connect; Communication line detecting unit U5Whether normal for detecting communication line, as found line fault, then record trouble state, it and 11 pin CMDCP, 17 pin RESET, 13 pin WIRE connect; Motor overload detecting unit U6When detection is closed and opens valve, whether current of electric transships, as found overload, then immediately to drive and control of electric machine unit U3Sending the signal stopping machine operation, and record overload, it and 34 pin MOTEB, 36 pin MOTE, 17 pin RESET connect; Battery voltage detection unit U7Whether normal for detecting backup battery voltage, as on the low side in found cell voltage, then record Lower state, it and 23 pin VBE, 17 pin RESET connect; Counting switch fault detection and impulse generating unit U8Whether normal and produce metering pulse for detecting counting switch work, as found counting switch operation irregularity, then recording exceptional state, it and 46 pin G1B, 47 pin G1,44 pin G2B, 45 pin G2,37 pin GC, 24 pin NSW1,17 pin RESET connect; Under meter counting unit U9For flow counting, when external command sends data on flows, then data transfer of data is sent unit U11, sending for data, it connects with 17 pin RESET; System clock selecting unit U10For generation and the selection of system clock, it and 1 pin SEL, 7 pin CLK1,5 pin CLK2,3 pin CLK3,9 pin ENCP connect; Data transmission unit U11Sending for data, it and 17 pin RESET, 9 pin ENCP, 15 pin CPOUT, 24 pin NSW1,26 pin NSW0 connect.
The logical circuit figure of each unit is as shown in Fig. 3��13, and Figure 14��18 are the logical circuit figure of part unit components, Figure 19 is encapsulation and the pin size figure of this application specific integrated circuit.
Embodiment 2
Adopt the two-line flow detection electronic device of flow detection application specific integrated circuit of the present invention.
Figure 20 is the schematic circuit diagram adopting unicircuit of the present invention to form flow detection electronic installation. Described electronic installation comprises clock circuit, electrification reset circuit, input filter protection circuit, stand-by battery B, diode DB, power filter electrolytic condenser E, input resistance RI, input interface JIN and two dry-reed tube; i.e. 1# dry-reed tube and 2# dry-reed tube, also comprises flow detection application specific integrated circuit, dry-reed tube filtering circuit, door control circuit, survey line circuit, battery detection circuit and communication and receives and send circuit. Wherein clock circuit, electrification reset circuit connect with flow detection application specific integrated circuit, dry-reed tube filtering circuit connects with two dry-reed tubes, also connect with flow detection application specific integrated circuit, door control circuit connects with flow detection application specific integrated circuit, survey line circuit connects with flow detection application specific integrated circuit, battery detection circuit connects with flow detection application specific integrated circuit, also connect with power supply VCC, communication receives and sends circuit and connects with flow detection application specific integrated circuit, also connects with input terminus VI.
Figure 21 is the schematic circuit diagram adopting unicircuit of the present invention to form flow detection electronic installation. Wherein DX0601 is flow detection application specific integrated circuit of the present invention, and it is the control core of whole electronic installation, have employed the application specific integrated circuit described in the embodiment of the present invention 1, and R1, R2, C1 form clock circuit; R3, C2 form electrification reset circuit; R5, R7, C4 form 1# dry-reed tube filtering circuit; R4, R6, C3 form 2# dry-reed tube filtering circuit; R8, C5 form door control circuit; R9, C6 form survey line circuit; R10, R11, R12, C7, NB form battery detection circuit; R13, R14, NI form communication and receive and send circuit; R15, TVS, C8 form input filter protection circuit; Input interface JIN is two-wire interface unit, is namely communication interface, is also power supply interface; RI is input protection resistor; E is power filter electrolytic condenser; B is stand-by battery, jointly forms stand-by power supply circuit with diode DB.
Some pins temporarily not used in flow detection application specific integrated circuit can be unsettled, such as the 28th pin OPEN. Undefined inside is free does not have pin such as the 2nd pin character NC used to mark.
The working process of the present embodiment is as follows: when 1# dry-reed tube and 2# dry-reed tube each closed once after, flow detection application specific integrated circuit internal record flow unit, after external control equipment sends communication signals to this electronic installation, the pulse of a string agreement (communication signals be), these signals enter the CMDCP port of flow detection application specific integrated circuit by R14, flow detection application specific integrated circuit is according to the instruction of communication signals, after door control (GT) time delays, return signal is sent by CPOUT port, these return signals can be flow signal, it can also be the working state signal of this electronic installation. when there is broken string fault in two lines of outside, the WIRE end level of survey line circuit changes, at this moment whole electronic installation is powered to power supply end VCC by diode DB by stand-by battery B, owing to the current consumption of whole device can control within ten microamperes, the capacity of stand-by battery B does not need too big, when stand-by battery B powers, by the output voltage VBE of battery detection circuit, it can be determined that the voltage of battery is normal or on the low side.
In the present embodiment, only used the most basic function that DX0601 type application specific integrated circuit of the present invention forms flow detection electronic installation, also have some functions, such as magnetic interference detection, tear table detection open, not all flow detection electronic installations such as driving opening-closing valve electric motors function all must possess, do not list in an embodiment. Above-described embodiment, only for the technical conceive of the present invention and feature are described, its object is to allow person skilled in the art can understand the content of the present invention and implement according to this, can not limit the scope of the invention with this. All equivalences done according to spirit of the invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (2)
1. flow detection application specific integrated circuit, comprises instruction reception unit (U2), drive and control of electric machine unit (U3), battery voltage detection unit (U7), under meter counting unit (U9), system clock selecting unit (U10) and data transmission unit (U11), it is characterised in that: also comprise Traffic Anomaly solution lock unit (U1), magnetic interference and tear table detecting unit (U open4), communication line detecting unit (U5), motor overload detecting unit (U6), counting switch fault detection and impulse generating unit (U8);
Wherein, Traffic Anomaly solution lock unit (U1) abnormal for flow detection time, to drive and control of electric machine unit (U3) send the motor drive signal of valve-off and receive the unlocking signal after getting rid of exception;
Instruction reception unit (U2) for receiving the communication instruction from outside, and send executive signal according to instruction to other unit;
Drive and control of electric machine unit (U3) for driving the motor closing or opening valve;
Magnetic interference and tear table detecting unit (U open4) for detecting the working condition of outside anomalous field interference flow detection dry-reed tube, and detect the working condition of tamper table switch, as found exception, then to drive and control of electric machine unit (U3) send the motor drive signal of valve-off, and recording exceptional state;
Communication line detecting unit (U5) whether normal for detecting communication line, as found line fault, then record trouble state;
Motor overload detecting unit (U6) detect whether current of electric when closing and open valve transships, as found overload, then immediately to drive and control of electric machine unit (U3) send the signal stopping machine operation, and record overload;
Battery voltage detection unit (U7) whether normal for detecting backup battery voltage, as on the low side in found cell voltage, then record Lower state;
Counting switch fault detection and impulse generating unit (U8) whether normal and produce metering pulse for detecting counting switch work, as found counting switch operation irregularity, then recording exceptional state;
Under meter counting unit (U9) for flow counting, when external command sends data on flows, then data transfer of data is sent unit (U11), send for data;
System clock selecting unit (U10) for the generation of system clock and selection;
Data transmission unit (U11) send for data; Traffic Anomaly solution lock unit (U1), instruction reception unit (U2), drive and control of electric machine unit (U3), magnetic interference and tear table detecting unit (U open4), communication line detecting unit (U5), motor overload detecting unit (U6), battery voltage detection unit (U7), counting switch fault detection and impulse generating unit (U8), under meter counting unit (U9) and system clock selecting unit (U10) be interconnected between this; Instruction reception unit (U2), system clock selecting unit (U10), data transmission unit (U11) be interconnected between this three.
2. according to flow detection application specific integrated circuit described in claim 1, it is characterised in that: described unicircuit adopts the encapsulation of LQFP48 type, has 48 pins, wherein Traffic Anomaly solution lock unit (U1) and 21 pins (UNLOCK), 17 pins (RESET) connect;
Instruction reception unit (U2) and 11 pins (CMDCP), 12 pins (GT), 9 pins (ENCP) connect;
Drive and control of electric machine unit (U3) and 17 pins (RESET), 24 pins (NSW1), 26 pins (NSW0), 29 pins (VB), 28 pins (OPEN), 30 pins (NOPEN), 32 pins (CLOSE), 33 pins (NCLOSE) connect;
Magnetic interference and tear table detecting unit (U open4) and 46 pins (G1B), 47 pins (G1), 44 pins (G2B), 45 pins (G2), 37 pins (GC), 39 pins (HGB), 41 pins (HG), 17 pins (RESET) connect;
Communication line detecting unit (U5) and 11 pins (CMDCP), 17 pins (RESET), 13 pins (WIRE) connect;
Motor overload detecting unit (U6) and 34 pins (MOTEB), 36 pins (MOTE), 17 pins (RESET) connect;
Battery voltage detection unit (U7) and 23 pins (VBE), 17 pins (RESET) connect;
Counting switch fault detection and impulse generating unit (U8) and 46 pins (G1B), 47 pins (G1), 44 pins (G2B), 45 pins (G2), 37 pins (GC), 24 pins (NSW1), 17 pins (RESET) connect;
Under meter counting unit (U9) connect with 17 pins (RESET);
System clock selecting unit (U10) and 1 pin (SEL), 7 pins (CLK1), 5 pins (CLK2), 3 pins (CLK3), 9 pins (ENCP) connect;
Data transmission unit (U11) and 17 pins (RESET), 9 pins (ENCP), 15 pins (CPOUT), 24 pins (NSW1), 26 pins (NSW0) connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210541102.5A CN103033227B (en) | 2012-12-14 | 2012-12-14 | Flow detection application specific integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210541102.5A CN103033227B (en) | 2012-12-14 | 2012-12-14 | Flow detection application specific integrated circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103033227A CN103033227A (en) | 2013-04-10 |
| CN103033227B true CN103033227B (en) | 2016-06-01 |
Family
ID=48020361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210541102.5A Expired - Fee Related CN103033227B (en) | 2012-12-14 | 2012-12-14 | Flow detection application specific integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103033227B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2539154Y (en) * | 2002-04-30 | 2003-03-05 | 大庆联谊伟华高科技有限公司 | Large flow water-meter controller of code exchange water repayment data |
| CN2927001Y (en) * | 2006-07-14 | 2007-07-25 | 张金运 | Outdoor direct-reading stepped watermeter by integrated chip |
| CN203053504U (en) * | 2012-12-14 | 2013-07-10 | 中国电子科技集团公司第四十七研究所 | Integrated circuit for flow detection |
-
2012
- 2012-12-14 CN CN201210541102.5A patent/CN103033227B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2539154Y (en) * | 2002-04-30 | 2003-03-05 | 大庆联谊伟华高科技有限公司 | Large flow water-meter controller of code exchange water repayment data |
| CN2927001Y (en) * | 2006-07-14 | 2007-07-25 | 张金运 | Outdoor direct-reading stepped watermeter by integrated chip |
| CN203053504U (en) * | 2012-12-14 | 2013-07-10 | 中国电子科技集团公司第四十七研究所 | Integrated circuit for flow detection |
Non-Patent Citations (2)
| Title |
|---|
| 全电池供电分线式智能水表抄表系统;赵峰等;《微处理机》;20100215(第1期);第126-128页 * |
| 智能卡水表及其专用集成电路的设计与实现;王天科;《电子与封装》;20051120;第5卷(第11期);第36-39页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103033227A (en) | 2013-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103033228B (en) | A kind of two-line flow detection electronic device | |
| CN107229270A (en) | Power control box Auto-Test System | |
| CN105226818A (en) | A kind of DC control protecting platform cabinet Monitor and Control device | |
| CN109066888A (en) | A kind of charging control circuit and electronic product with temperature protection | |
| CN106887061A (en) | A kind of intelligent access control system and control method based on Internet of Things | |
| CN107305526A (en) | A kind of debugger for microcontroller | |
| CN205679749U (en) | Power on/off observation circuit | |
| CN203116784U (en) | Two-wire system flow rate detecting electronic device | |
| CN103033227B (en) | Flow detection application specific integrated circuit | |
| CN201387643Y (en) | Non-contact clip-type intelligent water-saving controller | |
| CN103983955B (en) | Power monitoring method in receiving and transmitting module test | |
| CN204256036U (en) | The power-off signal that power supply interrupts produces circuit | |
| CN107422254B (en) | A kind of built-in chip health status towards integrated micro-system is from monitoring method | |
| CN103701095B (en) | A kind of test equipment protection circuit | |
| CN110987496B (en) | Detection device for monitoring running condition of flap door | |
| CN112526898B (en) | Serial port line plug detection circuit and embedded equipment | |
| CN203053504U (en) | Integrated circuit for flow detection | |
| CN209296821U (en) | Detection device, system and the electronic equipment of external antenna interface | |
| CN103779838B (en) | Switching power supply management circuit system | |
| CN108735309A (en) | The in-service verifying attachment of reactor protection system | |
| CN105023331B (en) | A kind of IC card entrance guard system | |
| CN103956714A (en) | High-sensitivity multifunctional CT open circuit protection device | |
| CN204536515U (en) | A kind of multi-power system trouble-shooter | |
| CN2308103Y (en) | Metering control device for gas meter with intelligence IC card | |
| CN201584660U (en) | Earth wire locking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160601 Termination date: 20181214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |