CN202433439U - Interface signal detecting and warning circuit - Google Patents
Interface signal detecting and warning circuit Download PDFInfo
- Publication number
- CN202433439U CN202433439U CN2011205488884U CN201120548888U CN202433439U CN 202433439 U CN202433439 U CN 202433439U CN 2011205488884 U CN2011205488884 U CN 2011205488884U CN 201120548888 U CN201120548888 U CN 201120548888U CN 202433439 U CN202433439 U CN 202433439U
- Authority
- CN
- China
- Prior art keywords
- input end
- warning circuit
- circuit
- interface signal
- voltage comparator
- 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 - Lifetime
Links
Images
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model discloses an interface signal detecting and warning circuit suitable for detecting a plurality of interface signals and capable of warning accurately; the interface signal detecting and warning circuit comprises a detecting circuit and a warning circuit; the detecting circuit comprises a computing amplifier, a mono-stable trigger and an OR gate, wherein the computing amplifier comprises a first voltage comparator and a second voltage comparator; an interface signal input end is connected with the negative input end of the first voltage comparator and the positive input end of the second voltage comparator; the positive input end of the first voltage comparator is connected with an upper limit voltage setting resistor; the negative input end of the second voltage comparator is connected with a lower limit voltage setting resistor; the output end of the second comparator is connected with the input end of the warning circuit; the output end of the first comparator is connected with the input end of the warning circuit and the input end of the mono-stable trigger; the output end of the mono-stable trigger is connected with the input end of the OR gate; the output end of the OR gate is connected with the input end of the warning circuit; and the mono-stable trigger is provided with a delay time setting circuit.
Description
Technical field
The utility model relates to a kind of circuit, relates to a kind of interface signal particularly and detects warning circuit.
Background technology
Present interfaces input warning circuit mainly is to have adopted a kind of optocoupler; Interface signal to be detected is connected to an end of the light emitting diode of optocoupler; The variation of interface signal high-low level can be controlled the current switching through light emitting diode; Thereby the control light emitting diode luminous with stop luminously, the level signal height of the output terminal through detecting optocoupler can obtain the level of interface signal.Yet use this type circuit, signal to be detected is that level is reported to the police or low level is reported to the police, if two kinds of level type of alarms support that all hardware adjustment is very inconvenient; If the alarm level time of interface signal is shorter; I.e. upwards burst pulse or downward burst pulse, several milliseconds of pulse widths even littler require the response speed of the alarm level judging circuit of next stage to want fast this moment; Otherwise will fail to report the police, even can not report to the police.Use such circuit in addition, can't detect the connection status of input signal cable.
The utility model content
The technical matters that the utility model will solve is: overcome deficiency of the prior art, the interface signal that propose a kind of suitable detection multiple interfaces signal, can accurately report to the police detects warning circuit.
The technical scheme of the utility model is: this interface signal detects warning circuit; It comprises testing circuit and warning circuit; Testing circuit comprises operational amplifier, monostalbe trigger or door, and operational amplifier comprises first voltage comparator, second voltage comparator; The voltage output end of interface signal and first voltage comparator-input end and second voltage comparator+input end is connected; First voltage comparator+input end is connected with the resistance that is provided with of upper voltage limit; Second voltage comparator-input end is connected with the resistance that is provided with of lower voltage limit; The output terminal of second comparer links to each other with the input end of warning circuit, and the output terminal of first comparer links to each other with the input end of the input end of warning circuit and monostalbe trigger, the output terminal of monostalbe trigger with or the door input end link to each other; Or the door output terminal link to each other with the input end of warning circuit, monostalbe trigger is provided with delay time circuit is set.
Owing to adopt this interface signal to detect warning circuit two kinds of alerting signals input warning circuits can be arranged, and delay time is set circuit is set, detect the multiple interfaces signal, can accurately report to the police so be suitable for.
Description of drawings
Fig. 1 is the circuit theory diagrams that detect warning circuit according to the interface signal of the utility model;
Fig. 2 is the circuit diagram that detects an embodiment of warning circuit according to the interface signal of the utility model.
Embodiment
Fig. 1 is the circuit theory diagrams that detect warning circuit according to the interface signal of the utility model; This interface signal detects warning circuit; It comprises testing circuit and warning circuit; Testing circuit comprises operational amplifier, monostalbe trigger or door, and operational amplifier comprises first voltage comparator, second voltage comparator; The voltage output end of interface signal and first voltage comparator-input end and second voltage comparator+input end is connected; First voltage comparator+input end is connected with the resistance that is provided with of upper voltage limit; Second voltage comparator-input end is connected with the resistance that is provided with of lower voltage limit; The output terminal of second comparer links to each other with the input end of warning circuit, and the output terminal of first comparer links to each other with the input end of the input end of warning circuit and monostalbe trigger, the output terminal of monostalbe trigger with or the door input end link to each other; Or the door output terminal link to each other with the input end of warning circuit, monostalbe trigger is provided with delay time circuit is set.
Preferably, the voltage output end of interface signal links to each other with 1 pull down resistor.
Preferably, the voltage output end of interface signal links to each other with 1 pull-up resistor.
Preferably, warning circuit comprises alarm signal level sensitive circuit and warning circuit, the input end of alarm signal level sensitive circuit with or the door output terminal link to each other, alarm signal level sensitive circuit output terminal links to each other with the input end of warning circuit.
Preferably, warning circuit connects the sensor of switching signal output.Further, said sensor is two mirror mobile detectors, vibration transducer.
Preferably, warning circuit connects alarm equipment.Further, said equipment is sound, light alarm device.
Fig. 2 is the circuit diagram that detects an embodiment of warning circuit according to the interface signal of the utility model.The interface signal that present embodiment provides detects warning circuit and comprises testing circuit and warning circuit; Wherein testing circuit comprises operational amplifier, monostalbe trigger or door; Interface signal is after drawing on the external pull-up resistor R6; Be wired to the input end of testing circuit; Link to each other with Transient Suppression Diode D1 with pull down resistor R9 is drop-down; Through behind the divider resistance R8, be connected with '-' input end of first voltage comparator of operational amplifier and '+' input end of second voltage comparator, '+' input end of first voltage comparator of operational amplifier and upper voltage limit resistance R 1 is set, R2 is connected; '-' input end of second voltage comparator and lower voltage limit resistance R 12 is set, R13 is connected, the output terminal of second comparer of operational amplifier (CONNECT signal) after drawing on the pull-up resistor R3 links to each other with the warning circuit input end; The output terminal of first comparer of operational amplifier (ALARM1 signal) after drawing on the pull-up resistor R7 links to each other with the input end of warning circuit and the input end of monostalbe trigger; The RX0 of monostalbe trigger, CX0 and RX1, CX1 link to each other with time configuration device R4, C1 and R10, C2 respectively, the output terminal Q0 of said monostalbe trigger, Q1 through divider resistance R5, R11 with or the input end of door link to each other; Or the door output terminal link to each other with the input end of warning circuit, the switch (SW1) of a termination area lock function links to each other with the input end of warning circuit after drawing on the pull-up resistor R14.Above warning circuit is realized through a slice micro-control unit (MCU).
The principle of work that the interface signal that present embodiment provides detects warning circuit is following:
Signal is input to '-' input end of operational amplifier first voltage comparator and '+' input end of second voltage comparator through external pull-up resistor R6, resistance R 9 and TVS pipe D1, divider resistance R8; With upper voltage limit resistance R 1 being set compares with R2 upper voltage limit Vref_H that is provided with and the voltage Vref_L that rolls off the production line that lower voltage limit is provided with resistance R 12 and R13 setting; Through relatively back output voltage CONNECT signal of operational amplifier U3 and ALARM1 signal; The CONNECT signal be input to microcontroller do the alarm signal line whether connection judgment handle; Whether the ALARM1 signal is input to microcontroller detection alarm signal level and changes; Judge and have or not alarm; The rising edge that the ALARM1 signal is input to monostalbe trigger U1 detects the input end that detects with negative edge, the time (R4 * C1 that is continued when monostalbe trigger Q0 and Q1 exported high level when delay time was provided with device R 4, C1 and R10, C2 rising edge, negative edge are set respectively; R10 * C2), monostalbe trigger output terminal Q0 is connected with said or door through divider resistance R5, R11 with Q1, or door output ALARM2 signal links to each other with microcontroller; Judge whether the input alarm signal has high pulse signal or low pulse signal to occur; Switch SW 1, the one end ground connection of function with lock, an end links to each other with the input end of said warning circuit after drawing on the pull-up resistor R14; Being used for being provided with micro-control unit (MCU) input alarm signal type, is level alarm mode or pulse alarm mode.What upper voltage limit was provided with that resistance R 1 and R2, lower voltage limit be provided with that resistance R 12 and R13, delay time be provided with that resistance R 4 and R10 select for use all is the conventional thick film sheet type fixed resistance of 0805 encapsulation of precision 1%; Delay time is provided with that capacitor C 1, C2 select 1% for use, the 0805 encapsulation multilayer sheet type ceramic condenser of 50ppm; The voltage detecting that therefore can guarantee degree of precision requires and the delay time requirement, and the computing formula of delay time is: R4 * C1; R10 * C2; That operational amplifier is selected for use is LM339, and that monostalbe trigger is selected for use is HEF4538, or door that select for use is 74HC32; Micro-control unit is selected 51 Series chip for use, various alarm equipments such as may command sound, light, and single-chip microcomputer adopts inquiry mode to the detection of input signal; Rather than interrupt mode; Can save a lot of resource of microprocessor like this, WV only needs two kinds of VCC1, VCC2, perhaps all uses VCC2 (can as required); Therefore the power supply that need not to add can satisfy requirements of different users with less expense.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Every technical spirit according to the utility model all still belongs to the protection domain of the utility model technical scheme to any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1. an interface signal detects warning circuit, and it comprises testing circuit and warning circuit, it is characterized in that: testing circuit comprises operational amplifier, monostalbe trigger or door, and operational amplifier comprises first voltage comparator, second voltage comparator; The voltage output end of interface signal and first voltage comparator-input end and second voltage comparator+input end is connected; First voltage comparator+input end is connected with the resistance that is provided with of upper voltage limit; Second voltage comparator-input end is connected with the resistance that is provided with of lower voltage limit; The output terminal of second comparer links to each other with the input end of warning circuit, and the output terminal of first comparer links to each other with the input end of the input end of warning circuit and monostalbe trigger, the output terminal of monostalbe trigger with or the door input end link to each other; Or the door output terminal link to each other with the input end of warning circuit, monostalbe trigger is provided with delay time circuit is set.
2. interface signal according to claim 1 detects warning circuit, and it is characterized in that: the voltage output end of interface signal links to each other with 1 pull down resistor.
3. interface signal according to claim 1 detects warning circuit, and it is characterized in that: the voltage output end of interface signal links to each other with 1 pull-up resistor.
4. interface signal according to claim 1 detects warning circuit; It is characterized in that: warning circuit comprises alarm signal level sensitive circuit and warning circuit; The input end of alarm signal level sensitive circuit with or the door output terminal link to each other, alarm signal level sensitive circuit output terminal links to each other with the input end of warning circuit.
5. interface signal according to claim 1 detects warning circuit, it is characterized in that: warning circuit connects the sensor of switching signal output.
6. interface signal according to claim 5 detects warning circuit, it is characterized in that: said sensor is two mirror mobile detectors or vibration transducer.
7. interface signal according to claim 1 detects warning circuit, it is characterized in that: warning circuit connects alarm equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205488884U CN202433439U (en) | 2011-12-23 | 2011-12-23 | Interface signal detecting and warning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205488884U CN202433439U (en) | 2011-12-23 | 2011-12-23 | Interface signal detecting and warning circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202433439U true CN202433439U (en) | 2012-09-12 |
Family
ID=46782878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205488884U Expired - Lifetime CN202433439U (en) | 2011-12-23 | 2011-12-23 | Interface signal detecting and warning circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202433439U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501655A (en) * | 2016-09-29 | 2017-03-15 | 江苏艾科半导体有限公司 | A kind of Kelvin's grounding alarm circuit |
| CN109031038A (en) * | 2018-05-25 | 2018-12-18 | 烽火通信科技股份有限公司 | A kind of method and circuit for realizing power fail warning in PON far end system |
| CN109061362A (en) * | 2018-07-24 | 2018-12-21 | 许继电源有限公司 | A kind of electric network power-fail detection circuit |
| CN112345812A (en) * | 2020-09-25 | 2021-02-09 | 华东光电集成器件研究所 | Amplifier signal amplitude-frequency detection circuit |
-
2011
- 2011-12-23 CN CN2011205488884U patent/CN202433439U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501655A (en) * | 2016-09-29 | 2017-03-15 | 江苏艾科半导体有限公司 | A kind of Kelvin's grounding alarm circuit |
| CN106501655B (en) * | 2016-09-29 | 2023-09-12 | 江苏艾科半导体有限公司 | Kelvin grounding alarm circuit |
| CN109031038A (en) * | 2018-05-25 | 2018-12-18 | 烽火通信科技股份有限公司 | A kind of method and circuit for realizing power fail warning in PON far end system |
| CN109061362A (en) * | 2018-07-24 | 2018-12-21 | 许继电源有限公司 | A kind of electric network power-fail detection circuit |
| CN109061362B (en) * | 2018-07-24 | 2020-09-25 | 许继电源有限公司 | Power grid power failure detection circuit |
| CN112345812A (en) * | 2020-09-25 | 2021-02-09 | 华东光电集成器件研究所 | Amplifier signal amplitude-frequency detection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202433439U (en) | Interface signal detecting and warning circuit | |
| CN105762767A (en) | Hardware protection circuit based on APFC | |
| CN203504837U (en) | Time-delay induction lamp with self-locking function | |
| CN102778849B (en) | Switching on and shutting down control circuit, electronic equipment and on-off control method | |
| CN207488440U (en) | Pulse generating circuit and power tube test device | |
| CN203982508U (en) | A kind of digital Electroacooustic alarm | |
| CN203563248U (en) | Control circuit for lighting-emergency dual-purpose sensor light | |
| WO2015196663A1 (en) | Battery detection apparatus and method, and battery theft detection system and method | |
| CN203120218U (en) | Lamp control circuit and induction lamp | |
| CN203337775U (en) | An IGBT status detecting circuit | |
| CN108989754A (en) | Intelligent security guard monitor control system | |
| CN201681452U (en) | Auto-voice induction reminder | |
| CN201673585U (en) | Civil air defense warning controller | |
| CN202049572U (en) | Museum protection device | |
| CN207219133U (en) | A kind of intelligent pulse high-voltage fence | |
| CN204719903U (en) | For the anti-theft device of keyboard or mouse | |
| CN205232304U (en) | Telephone circuit warning circuit that opens a way | |
| CN206805994U (en) | Recording instrument without paper with backlight drive protection | |
| CN204928093U (en) | Power supply protection circuit | |
| CN204046260U (en) | A kind of power control unit of fire alarm control unit | |
| CN207487715U (en) | Air conditioning energy consumption monitors system | |
| CN209074092U (en) | Intelligent curtain control system | |
| CN211263600U (en) | Electrical detection device | |
| CN204065298U (en) | AC dump Rapid Alarm device | |
| CN204129929U (en) | Light sensation, touch dual-purpose alarm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |