CN201941762U - High temperature alarm circuit for automotive retarder - Google Patents
High temperature alarm circuit for automotive retarder Download PDFInfo
- Publication number
- CN201941762U CN201941762U CN2011200235013U CN201120023501U CN201941762U CN 201941762 U CN201941762 U CN 201941762U CN 2011200235013 U CN2011200235013 U CN 2011200235013U CN 201120023501 U CN201120023501 U CN 201120023501U CN 201941762 U CN201941762 U CN 201941762U
- Authority
- CN
- China
- Prior art keywords
- circuit
- circuit module
- module
- signal processing
- sensor signal
- 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
Images
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model belongs to the technical field of high temperature electronic detection circuits and relates to a high temperature alarm circuit for an automotive retarder. The alarm circuit comprises a power circuit module, a sensor signal processing circuit module and an oscillating circuit module. The output end of the power circuit module is connected with the sensor signal processing circuit module and the oscillating circuit module, the power circuit module provides working power supplies for the sensor signal processing circuit module and the oscillating circuit module, the sensor signal processing circuit module adopts an integrated op-amp module LM324, and the oscillating circuit module consists of a time-base circuit NE555, peripheral circuits of the NE555, a field-effect tube and peripheral circuits of the field-effect tube. The alarm circuit can timely give alarm information when the temperature of the retarder reaches an upper limit and inform users to take measures timely, thereby ensuring the system runs normally and orderly.
Description
Technical field
The utility model belongs to high-temperature electronic testing circuit technical field, relates generally to a kind of automobile retarder high temperature alarm circuit.
Background technology
Along with the develop rapidly of auto-industry, the demand of retarder for vehicles is also constantly rising.In the ordinary course of things, retarder is through after a while use, and exciting current can make the main body heating, for guaranteeing being perfectly safe of system, need detect the system body temperature, so that temperature is carried out control corresponding.
Summary of the invention
The purpose of this utility model is to propose a kind of automobile retarder high temperature alarm circuit, in time sends alarm message when making the retarder temperature reach the ceiling temperature boundary, informs that the user in time takes measures, with the reliable normal orderly work of protection system.
For finishing the foregoing invention task, the utility model adopts following technical scheme:
A kind of automobile retarder high temperature alarm circuit, described high temperature alarm circuit comprise power circuit module, sensor signal processing circuit module and oscillating circuit module; The mouth of described power circuit module links to each other with the oscillating circuit module with the sensor signal processing circuit module; Described power circuit module provides working power for sensor signal processing circuit module and oscillating circuit module; Described sensor signal processing circuit module comprises signal amplification circuit filter, hysteresis comparator circuit and output circuit, described signal amplification circuit filter is made up of U2 integrated transporting discharging module LM324 and peripheral circuit thereof, and wherein the U2A of LM324, U2B, U2C form the differential amplifier of a high input impedance; Described hysteresis comparator circuit is made up of U2D amplifier and its peripheral circuit of amplifier module LM324, and is provided for electric thermo-couple temperature is carried out self-conpensating diode D2, D3; Described output circuit is made up of aerotron Q2, D1 and relay K; Described oscillating circuit module is made up of time base circuit NE555 and peripheral circuit, field effect transistor and peripheral circuit thereof; The circuit that time base circuit NE555 and peripheral circuit thereof are formed is an oscillation source, and the circuit that field effect transistor reaches and peripheral circuit is formed is an electronic switch.
A kind of automobile retarder high temperature alarm circuit that the utility model proposes in time sends alarm message when making the retarder temperature reach the ceiling temperature boundary, informs that the user in time takes measures, the reliable normal orderly work of protection system; Owing to utilize integrated operational amplifier LM324; differential amplifier and the hysteresis comparator circuit of having formed high input impedance; utilize the temperature coefficient characteristics of diode to do the electric thermo-couple temperature automatic compensation simultaneously; therefore improved the survey precision of temperature and the precision of control output, measured the multiplicity height, the temperature deviation scope is little; accurate than the general measure circuit owing to take off data; can in time pinpoint the problems, protect retarder, prevent the generation of the system failure.
Description of drawings
Fig. 1 is the utility model high temperature alarm circuit schematic diagram.
Fig. 2 is the schematic diagram of power circuit module in the utility model.
Fig. 3 is the schematic diagram of sensor signal processing circuit module in the utility model.
Fig. 4 is the schematic diagram of oscillating circuit module in the utility model.
The specific embodiment
With specific embodiment the utility model is illustrated in conjunction with the accompanying drawings, but does not constitute restriction of the present utility model:
As shown in Figure 1, a kind of automobile retarder high temperature alarm circuit, described high temperature alarm circuit comprise power circuit module, sensor signal processing circuit module and oscillating circuit module; The mouth of described power circuit module links to each other with the oscillating circuit module with the sensor signal processing circuit module respectively, and described power circuit module provides working power for sensor signal processing circuit module and oscillating circuit module; Described sensor signal processing circuit module comprises signal amplification circuit filter, hysteresis comparator circuit and output circuit, as shown in Figure 2, described power circuit module is made up of U1 Voltage stabilizing module 78L12 and self-healing fuse F, dropping resistor R1 and elements such as capacitor C 1, C2; The automobile-used storage battery positive pole of 24V is from the end input of F, another termination R1 step-down of F, the positive pole of another termination filter capacitor C1 of R1 and 1 pin of regulator block 78L12; The 2 pin ground connection of 78L12, the stable voltage of 3 pin output+12V, the negative pole power connection ground of C1, the 3 pin other end ground connection of the termination 78L12 of C2.
As shown in Figure 3, described sensor signal processing circuit module comprises signal amplification circuit filter, hysteresis comparator circuit and output circuit, described signal amplification circuit filter is made up of U2 integrated transporting discharging module LM324 and peripheral circuit thereof, the U2A of LM324 wherein, U2B, U2C forms the differential amplifier of a high input impedance, it can not only cut off the transmission of common-mode signal, realized that drift is complementary, the input impedance height, make output signal not comprise common-mode signal, four amplifiers encapsulation in the housing that coexists has simultaneously overcome the components and parts temperature and has floated influence with external interference, can not produce decay, without interruption, be easy to just can receive the temperature voltage signal of thermocouple impression, improved thermometric precision, the output cathode of thermocouple is connected to 1 pin of J1, negative pole is connected on 2 pin of J1, and 1 pin of J1 links to each other with 10 pin of U2; Cond C6 is connected between 1 pin and ground of J1, can play filter action, and 2 pin of J1 link to each other with 3 pin of U2; One of resistor R 5 terminates between 3 pin and ground of U2, and one of R13 terminates at U2; The other end of R13 joins with the positive pole of+12V, and R13 and R5 form a bleeder circuit, makes back grade or obtains a static active potential, 4 pin of integrated package connect+positive pole of 12V, 7 pin ground connection are connected to a cond C3 between+12V positive pole and the ground, power supply is played the decoupling effect; 2 pin and 9 pin of U2 link by R6 resistance, are connected to feedback resistance R9 between 1 pin of U2 and 2 pin; Be connected to feedback resistance R10 between 8 pin and 9 pin, string has resistance R 11, resistance R 14 to be serially connected between 8 pin and 5 pin between 1 pin and 6 pin, is connected between 5 pin and the ground between resistance R 16,6 pin and 7 pin and is connected to feedback resistance R15, and string has resistance R 7 between 7 pin and 12 pin; Described hysteresis comparator circuit is made up of U2D amplifier and its peripheral circuit of amplifier module LM324; Being described hysteresis comparator circuit is made up of the U2D amplifier of integrated package and R19, R12 and diode D2, D3, R12 and D2, D3 constitute the automatic compensation of bleeder circuit and temperature, and the current potential of U2D amplifier backward end 13 is determined to reduce to export with compensation sensor along with the rising forward voltage drop of ambient temperature by the forward voltage drop of diode D2, D3; String has the R19 resistor between 12 pin of integrated package and 14 pin, and+12V power positive end links to each other with an end of R12 resistor, and the other end links to each other with the anode of D2 and 13 pin of integrated package.
As shown in Figure 4, described oscillating circuit module is made up of time base circuit NE555 and peripheral circuit, field effect transistor and peripheral circuit thereof; C4, CR2, R17, C3 and U3NE555 time base circuit are formed the multi-vibrator of standard, square-wave signal from mouth 3 pin output vibration, mouth 3 pin system resistor R 18 is connected together, the control utmost point G of the end of the other end of R18 and R3 and Q1 links together, and the end of R18 and the drain electrode S of Q1 connect together with ground; The circuit that time base circuit NE555 and relevant group are held the element composition is an oscillation source, and Q1 and built-up circuit thereof are electronic switching; Described output circuit is become with R/G K by aerotron Q2, diode D1, being described output circuit is linked to each other with the base stage of aerotron Q2 by the R8 resistor by 14 pin of integrated package, the grounded emitter of Q2, collecting electrode links to each other with the negative pole of diode D1, the anodal power connection 24V+ of D1 and relay K D1 in parallel; Wherein: described aerotron Q2 plays on-off action; D1 is a continued flow component, and R8 is a current-limiting resistance; When thermocouple sensor is being experienced temperature and then is being produced induced voltage on the retarder after, will be on the J1 terminal by the differential acceptance and then the amplification of high resistance, handle, promoting output stage through the hysteresis loop comparator comparison process then makes relay K 1 correct conversion reach the purpose of control, guarantee survey precision, reduced deviation again.
When sensor signal processing circuit is delivered to relay K 1 with alerting signal, the relay normally open contact closure, the square wave oscillation signal of waiting for will be given Q1 from 3 pin of NE555, after this source electrode D of Q1 will export near the square-wave signal of 24V give indicator lamp and and other warning loads, remind user or execute protection task; Square-wave oscillator is being worked always behind the power connection, and Q1 is always by output, and in a single day having guaranteed has warning, just can enter the reflection state immediately; Can utilize simultaneously the contact of K1 relay to play the corresponding actuating unit implementation of control protection fast.
Claims (1)
1. automobile retarder high temperature alarm circuit, described high temperature alarm circuit comprises power circuit module, sensor signal processing circuit module and oscillating circuit module; The mouth of described power circuit module links to each other with the oscillating circuit module with the sensor signal processing circuit module; Described power circuit module provides working power for sensor signal processing circuit module and oscillating circuit module; It is characterized in that: described sensor signal processing circuit module comprises signal amplification circuit filter, hysteresis comparator circuit and output circuit, described signal amplification circuit filter is made up of U2 integrated transporting discharging module LM324 and peripheral circuit thereof, and wherein the U2A of LM324, U2B, U2C form the differential amplifier of a high input impedance; Described hysteresis comparator circuit is made up of with its peripheral circuit the U2D amplifier of amplifier module LM324 and is provided for electric thermo-couple temperature is carried out self-conpensating diode D2, D3; Described output circuit is made up of aerotron Q2, D1 and relay K; Described oscillating circuit module is made up of time base circuit NE555 and peripheral circuit, field effect transistor and peripheral circuit thereof; The circuit that time base circuit NE555 and peripheral circuit thereof are formed is an oscillation source, and the circuit that field effect transistor reaches and peripheral circuit is formed is an electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200235013U CN201941762U (en) | 2011-01-20 | 2011-01-20 | High temperature alarm circuit for automotive retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200235013U CN201941762U (en) | 2011-01-20 | 2011-01-20 | High temperature alarm circuit for automotive retarder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201941762U true CN201941762U (en) | 2011-08-24 |
Family
ID=44469110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200235013U Expired - Fee Related CN201941762U (en) | 2011-01-20 | 2011-01-20 | High temperature alarm circuit for automotive retarder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201941762U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532835A (en) * | 2016-12-06 | 2017-03-22 | 湖北大学 | Charging device and charger |
-
2011
- 2011-01-20 CN CN2011200235013U patent/CN201941762U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532835A (en) * | 2016-12-06 | 2017-03-22 | 湖北大学 | Charging device and charger |
| CN106532835B (en) * | 2016-12-06 | 2019-04-09 | 湖北大学 | Charging unit and charger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202330559U (en) | Automobile insulating resistor detecting circuit | |
| CN102193021A (en) | Current sensor | |
| CN204670385U (en) | A kind of electronic cigarette | |
| CN201941762U (en) | High temperature alarm circuit for automotive retarder | |
| CN104330187A (en) | Temperature detection system capable of realizing power saving mode | |
| CN203606408U (en) | Electric energy metering device capable of preventing electricity larceny | |
| CN104850162B (en) | A kind of have the highly reliable constant current source circuit suppressing to connect instant high-voltage function | |
| CN203414136U (en) | Liquid-level sensor circuit | |
| CN203759564U (en) | Double closed-loop temperature control circuit | |
| CN202453417U (en) | High-voltage live displaying and locking device for intelligent induction type switch cabinet | |
| CN202404464U (en) | Temperature measuring and controlling device | |
| CN204188299U (en) | Multichannel IGBT inner NTC high temperature real-time detection circuit | |
| CN207283265U (en) | It is a kind of based on solar powered and timing transmission power transmission line monitoring system | |
| CN202614719U (en) | Amplifying circuit for carbon monoxide sensor | |
| CN204679099U (en) | A kind of vehicle oil controlling/monitoring device | |
| CN205909941U (en) | Low -temperature alarm ware based on triode temperature characteristic | |
| CN204145442U (en) | Positive and negative power supply synchronously powers on scheme circuitry | |
| CN211785914U (en) | MOSFET internal resistance detection circuit | |
| CN202159083U (en) | Electricity stealing resistant electricity meter | |
| CN208795407U (en) | A kind of pressure acquisition circuit of pipe pressure collector | |
| CN206542241U (en) | A kind of GPRS terminals accessory power supply switching control system | |
| CN204432424U (en) | A kind of car emergency carrying screen display starts power supply | |
| CN210894599U (en) | Circuit control structure with junction temperature monitoring and high-temperature reverse bias | |
| CN204851375U (en) | Internal -combustion engine increases journey ware machine oil alarm system | |
| CN208367179U (en) | A kind of detection battery undervoltage circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20180120 |