CN205384725U - Motormeter alarm signal's detection control apparatus - Google Patents
Motormeter alarm signal's detection control apparatus Download PDFInfo
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- CN205384725U CN205384725U CN201620057263.0U CN201620057263U CN205384725U CN 205384725 U CN205384725 U CN 205384725U CN 201620057263 U CN201620057263 U CN 201620057263U CN 205384725 U CN205384725 U CN 205384725U
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Abstract
The utility model discloses a motormeter alarm signal's detection control apparatus. It sets up signal collector and warning driver, with the level data signal access microprocessor input of signal collector output, exports the input of control signal direct access warning driver with microprocessor again. Owing to take the structure, it is that the high -low level signal of instrumentation tap inputs for microprocessor only to need collecting wire to restraint the end to the motormeter of difference, microprocessor drives emitting diode according to the level signal who gathers again can. Needn't change the PCB circuit again, save the change cycle, reduce the unnecessary wasting of resources, increase the commonality and the adaptability of instrument, also strengthen warning circuit's security and reliability simultaneously, reduce the undulant influence to instrument warning circuit because of external signal. And have advantages such as structural design is simple reasonable, the working property is reliable and stable, suitable trade is widelyd popularize.
Description
Technical field
This utility model relates to the Detection & Controling device of 24V power-supply system automobile instrument alarm signal.
Background technology
On vehicle, the alarm signal in instrument mainly has deictic function and prompt functions, in the automobile instrument of 12V power-supply system, most bell characters are all CAN signals, owing to the outside grafting wire harness of this alarm signal is few, gauge internal processes simple for the driving of signal, it is not necessary to signal is detected.But in 24V power-supply system automobile instrument not so, the signal of CAN is almost little, the overwhelming majority be all external terminal directly input switch level signal control report to the police, and the kind quantity of instrument is various, arrangement with its alarm lamp signal of instrument of a series of different models is just different, and the arrangement of pin definitions is random, each bell character is also different in the position of instrument at all cannot be general.So, accurate in order to what ensure to report to the police, the change of individual signal certainly will being carried out it is necessary to change PCB circuit again, thus causing unnecessary trouble, the waste of resource and the lengthening in change cycle, and directly affecting the work efficiency of product.
Summary of the invention
The purpose of this utility model is contemplated to provide the detection control apparatus of a kind of automobile instrument alarm signal.Mainly solving the kind quantity of instrument in prior art various, alarm signal irregular arrangement cannot be general, again change PCB circuit trouble, and waste resource also lengthens the change cycle, the problem affecting work efficiency.
The technical solution of the utility model is as described below；It includes microprocessor, by arranging signal picker and alert driver, by signal picker export multilevel digital signal access microprocessor input, then microprocessor is exported control signal be directly accessed alert driver input realize.
Described signal picker is by being respectively provided with, at the high level of multiple switch detection interface MC33972ATEW detection port, the branch circuit that forward diode is in series with resistance, and detect port in low level and be respectively provided with the branch circuit being in series by backward diode and resistance, set series resistance at positive supply and internal clock signal port simultaneously, and between positive supply and neutral point, be respectively provided with electric capacity composition working power and additional supply composition.
Described alert driver is the series arm being respectively provided with LED and resistance between each output driving port and the positive supply of the shift register TPIC6C595 sealed in and go out, and its SER_IN and SER_OUT port of the shift register TPIC6C595 sealed in described at least two and go out is connected and composed cascade operation.
The beneficial effects of the utility model: this utility model owing to taking multiple switch detection interface chip, seal in and the signal picker of the shift register that goes out and external connected electronic device composition thereof and alert driver structure, combination plus microprocessor, the low and high level that only need to gather wire harness end and instrumentation tap signal for different automobile instruments inputs to microprocessor, microprocessor further according to the level signal collected to drive each warning light and LED light emitting diode can realize the purpose of the present invention.Need not again change PCB circuit, eliminate the change cycle, decrease the unnecessary wasting of resources, add versatility and the adaptability of instrument, also enhance the safety and reliability of warning circuit simultaneously, reduce because of the external signal fluctuation impact on instrument warning circuit.And there is structural design advantages of simple, the advantage such as stable and reliable working performance, suitable industry are widelyd popularize.
Accompanying drawing explanation
Fig. 1 is overall structure block chart of the present utility model；
Fig. 2 is signal picker circuit diagram of the present utility model；
Fig. 3 is alert driver circuit diagram of the present utility model.
Detailed description of the invention
The detection control apparatus of the automobile instrument alarm signal shown in Fig. 1 Fig. 3, it is made up of signal picker 1, microprocessor 2 and alert driver 3 three part.Described signal picker 1 is to detect port SP0-SP3 by the high level at multiple switch detection interface and MC33972ATEW, SP4-SP7 is respectively provided with forward diode D1-D4 and resistance R2-R5, forward diode D11-D14 with the resistance R6-R9 branch circuit being in series, and detect port SG0-SG5 in low level, SG9-SG13 is respectively provided with backward diode D5-D10, D15-D19, set series resistance R1 at positive supply VDD and internal clock signal port CS simultaneously, and at VDD, electric capacity C2 it is respectively provided with between VPWR and neutral point, C1 forms working power and additional supply.Separately low level is detected port SG6-SG8 ground connection, in case the interference that pin suspends and causes.Described alert driver 3 is the series arm being respectively provided with LED 1-LED8 and resistance R10-R17, LED 9-LED16 with resistance R18-R25 between SI PO shift register and each output driving port DRAIN0 DRAIN7 and positive supply VPWR of TPIC6C595 that eight bit strips latch, and its SER_IN and SER_OUT port of the shift register TPIC6C595 sealed in described at least two and go out is connected and composed cascade operation.Certainly determine the number of cascade also dependent on the quantity driving load, the sixteen bit shift register giving SI PO shift register that is two the TPIC6C595 composition that two eight bit strips latch in present embodiment drives 16 alarm signals to constitute.
During utility model works, first the switch level input signal that the alarm signal sent here by automobile instrument wire harness end by high and low level detection port SP0 SP7, the SG0 SG13 of multiple switch detection interface chip and MC33972ATEW and pin directly input carries out detecting or gathering, namely the detection port SP0-SP7 of MC33972ATEW can detect the low level of outside port and can also detect the high level of outside port, and detect port SG0-SG13 and may only detect the low level of outside port, therefore it has the ability of detection 22 path switching signals.Fig. 2 is accomplished that detection 7 road high level and the low level situation in 11 tunnels.Having a 4.0V voltage comparator inside each of which port, when voltage is higher than 4.0V, the data of this port, to high level signal, are put 1 by Port detecting simultaneously.When voltage is lower than 4.0V, the data of port, to low level signal, are set to 0 by Port detecting simultaneously.Then the state of each port is inputed to microprocessor 2 by the form of presentation of Binary Zero and 1 by SPI communication by the detection data of all of the port SP0 SP7, SG0 SG13.Microprocessor 2, further according to the data detected, judges whether to drive alarm signal, and the TPIC6C595 then controlled in alert driver 3 completes the driving function to alarm signal.Described alert driver 3 can be used for driving 8N LED load, and have only to 3 ports communicate with microprocessor 2, dramatically saves on the port resource of microprocessor 2, its 8 passages have the driving force of the output continuously of 100mA, and the limit driving force of total total 250mA is available.
Claims (3)
1. the detection control apparatus of an automobile instrument alarm signal, including microprocessor (2), it is characterized in that: signal picker (1) and alert driver (3) are set, the multilevel digital signal exported by signal picker (1) accesses microprocessor (2) input, then microprocessor (2) output control signal is directly accessed alert driver (3) input.
null2. detection control apparatus according to claim 1，It is characterized in that: described signal picker (1) is to detect port (SP0-SP3 by the high level at multiple switch detection interface (MC33972ATEW)、SP4-SP7) forward diode (D1-D4) and resistance (R2-R5) it are respectively provided with、The branch circuit that forward diode (D11-D14) and resistance (R6-R9) are in series，And detect port (SG0-SG5 in low level、SG9-SG13) backward diode (D5-D10 it is respectively provided with、D15-D19)，Set series resistance (R1) at positive supply (VDD) and internal clock signal port (CS) simultaneously，And at (VDD、And between neutral point, be respectively provided with electric capacity (C2 VPWR)、C1) composition working power and additional supply are constituted.
3. detection control apparatus according to claim 1, it is characterized in that: described alert driver (3) is the series arm being respectively provided with light emitting diode (LED1-LED8) and resistance (R10-R17), light emitting diode (LED9-LED16) and resistance (R18-R25) between each output driving port (DRAIN0 DRAIN7) and the positive supply (VPWR) of the shift register (TPIC6C595) sealing in and going out, and its SER_IN and SER_OUT port of shift register (TPIC6C595) sealing in described at least two and going out is connected and composed cascade operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620057263.0U CN205384725U (en) | 2016-01-21 | 2016-01-21 | Motormeter alarm signal's detection control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620057263.0U CN205384725U (en) | 2016-01-21 | 2016-01-21 | Motormeter alarm signal's detection control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205384725U true CN205384725U (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620057263.0U Expired - Fee Related CN205384725U (en) | 2016-01-21 | 2016-01-21 | Motormeter alarm signal's detection control apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN205384725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406862A (en) * | 2018-12-11 | 2019-03-01 | 广西玉柴机器股份有限公司 | A kind of switching quantity detection circuit of compatible height significant level |
-
2016
- 2016-01-21 CN CN201620057263.0U patent/CN205384725U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406862A (en) * | 2018-12-11 | 2019-03-01 | 广西玉柴机器股份有限公司 | A kind of switching quantity detection circuit of compatible height significant level |
| CN109406862B (en) * | 2018-12-11 | 2023-09-19 | 广西玉柴机器股份有限公司 | Switching value detection circuit compatible with high and low effective levels |
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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 |
Granted publication date: 20160713 Termination date: 20180121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |