CN201320968Y - Electronic combination instrument for vehicle - Google Patents
Electronic combination instrument for vehicle Download PDFInfo
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- CN201320968Y CN201320968Y CNU2008202411802U CN200820241180U CN201320968Y CN 201320968 Y CN201320968 Y CN 201320968Y CN U2008202411802 U CNU2008202411802 U CN U2008202411802U CN 200820241180 U CN200820241180 U CN 200820241180U CN 201320968 Y CN201320968 Y CN 201320968Y
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Abstract
The utility model relates to an electronic combination instrument for a vehicle, which pertains to technical field of vehicle instrument display device and mainly solves the problems of great power consumption, high calorific value, low conversion efficiency, large error and indicator power-down/ unreliable zero restoring after power off of power supply circuit in prior art. The electronic combination instrument is mainly characterized in that the instrument comprises an instrument circuit board with a micro controller, an instrument bracket, a graduated disc, an instrument indicator, a stepping motor, a connector assembly, a push button, a dot-matrix liquid crystal display and a shell, a lining plate and glass; a switch power supply circuit and an indicator power-failure/power-down zero restoring circuit are arranged on the instrument circuit board; the switch power supply circuit consists of an input circuit, a switch power supply and an output circuit; the input circuit consists of an anti-reverse connection circuit, an over-voltage and over-current protection circuit and a multi-band filter decoupling circuit connected with a polymer capacitor in parallel; the anti-reverse connection circuit, the over-voltage and over-current protection circuit and the multi-band filter decoupling circuit are connected in sequence; the indicator power-failure/power-down zero restoring circuit consists of a power supply monitor, a stepping motor unit and a control pin of the micro controller. The utility model is mainly applicable to electronic combination instruments for vehicles.
Description
Technical field
The utility model belongs to auto meter display device technology field.Be specifically related to a kind of vehicle electronics combination instrument.
Background technology
Existing most of truck combination instrument, generally all constitute by members such as the wiring board that contains microcontroller, calibrated disc, meter hand, stepping motor, connector, button, a segmentation liquid crystal display and shell, liner plate, glass, wherein, adopt the linear power supply circuit supply, its weak point is that power consumption is big, cal val is high, conversion efficiency is low, and error is big.Simultaneously, the linear power supply circuit input end is not done the protection processing of abnormity of power supply such as overvoltage, overcurrent, surge.Owing to be not provided with the pointer power down/null circuit that cut off the power supply back, thereby pointer is in power down/when zero-bit is got back in outage, keeps back the power supply of zeroing by a big capacitive strike, and weak point is the cost height, volume is big, electric weight is little, discharge time is short, and is time zero unreliable.Be used for showing the liquid crystal display of information, often only show travel mileage number, clock, quantity of information is little, the real-time working condition of each parts, technical parameter, vehicle condition etc. when fully display automobile travels.
Summary of the invention
The purpose of this utility model is exactly to provide at above-mentioned weak point that a kind of instrument power circuit power consumption is little, cal val is low, conversion efficiency is high, error is little, the pointer power down/zero failure-free vehicle electronics combination instrument cut off the power supply back.
Technical solution of the present utility model is: a kind of vehicle electronics combination instrument, comprise instrument circuit board, instrument support, calibrated disc, meter hand, stepping motor, connector, button, lattice lcd screen and the shell, liner plate, the glass that contain microcontroller, it is characterized in that: described instrument circuit board is provided with the powered switch power circuit and the pointer power down/null circuit cuts off the power supply back; This switch power supply route input circuit, Switching Power Supply, output circuit are formed; The multiband filtering decoupling circuit that this input circuit is made up of bonded assembly reverse-connection preventing circuit, over-voltage over-current protection circuit and chemical capacitor in parallel successively constitutes; This pointer power down/cut off the power supply back null circuit is made of the control pin of power supply monitoring, stepper motor and microcontroller.
Over-voltage over-current protection circuit described in the technical solution of the present utility model is formed in parallel from recovering connect with voltage transient suppressing unit TVS high-power, the wave forms impact of anti-Millisecond the capacitor bank and the transient suppressor of ground connection and employing different stage rated value gradient of insurance resistance PTC by the positive temperature coefficient that high voltage withstanding value, anti-big current value, opening time is Millisecond.
Lattice lcd screen described in the technical solution of the present utility model adopts the wide LCDs of dot matrix, change parallel port IC by serial ports and be connected with the instrument microcontroller, the instrument microcontroller is by CAN transceiver interface IC and the total wire joint of the on-the-spot local area control network C AN of automobile; Two buttons that can press the left rotation and right rotation operation about wiring board (1) is provided with.
The utility model is owing to adopt by high voltage withstanding value; anti-big current value; be that the positive temperature coefficient of Millisecond is insured resistance PTC and high-power from recovery opening time; the switching power circuit input circuit that the capacitor bank of the voltage transient suppressing unit TVS series connection ground connection of the wave forms impact of anti-Millisecond the and employing different stage rated value gradient and transient suppressor compose in parallel; thereby when automobile input momentary voltage is excessive; voltage transient suppressing unit instantaneous breakdown; absorb instantaneous high pressure; loop current increases severely; from recovering resistance heating fast thus; resistance becomes infinity; almost bear the whole voltages of circuit; almost block loop current; reduce the voltage that transient suppressor is born; the input of the Switching Power Supply of blocking-up rear end; the protection switch power supply, thus realize the over voltage of instrument to vehicle; overcurrent; surge; the Electro-Static Discharge protection.Simultaneously, the input end of next-door neighbour's Switching Power Supply adopts the electric capacity of different stage rated value in parallel with transient suppressor, absorbs the impact of instantaneous big voltage and interference source, also plays the power protection effect.
The utility model adopts automotive battery to give the power supply of meter switch power supply owing to adopt and to return null circuit by the pointer power down that constitutes, thereby the work of Switching Power Supply and close and be subjected to the instrument microprocessor control.Instrument is judged automotive ignition lock power supply electric power thus supplied, after the instrument microcontroller is judged ignition lock power down/outage, send instruction, instrument is carried out and is preserved data, pointer returns zeroing, after reliable in action is finished, the output of instrument microcontroller stopcock power supply makes instrument be in electroless state substantially, thereby the quiescent dissipation of instrument is dropped to bottom line.Have the advantages that error is little, power consumption is little, cal val is low, conversion efficiency is high.
The utility model is owing to adopt the wide liquid crystal display of dot matrix, and be connected with the instrument microcontroller, the instrument microcontroller is by CAN transceiver interface and the total wire joint of the on-the-spot local area control network C AN of automobile, two buttons that can press the left rotation and right rotation operation about wiring board is provided with, thereby the input information signal that shows is obtained from the collection of the on-the-spot local area control network C of automobile AN bus, liquid crystal display is display automobile travelled distance number not only, clock, date, voltage, information such as engine oil pressure, the gear that can also show engage a gear, the oil consumption of travelling, information such as vehicle trouble are switched by button.
The utility model overcomes always the problem that exists, the characteristics that have that the instrument power circuit power consumption is little, cal val is low, conversion efficiency is high, error is little, a pointer power down/cut off the power supply back zero reliably, demonstration contain much information.The utility model is mainly used in the vehicle electronics combination instrument.
Description of drawings
Fig. 1 is a front elevation of the present utility model;
Fig. 2 is the utility model power protection, power down/zero control circuit figure cuts off the power supply back;
Fig. 3 is the new CAN bus of this practicality, button, liquid crystal display circuit figure;
Fig. 4 is that the utility model shows mileage number, clock, date, gear, fuel consumption of 100km state, the liquid crystal diagrammatic sketch on clock, date;
Fig. 5 is the liquid crystal diagrammatic sketch of the utility model display automobile fault, alarm state.
Fig. 6 is the utility model oil consumption state liquid crystal diagrammatic sketch;
Fig. 7 is a structural representation of the present utility model.
The specific embodiment
As Fig. 1, shown in Figure 7.The vehicle electronics combination instrument is made up of members such as wiring board 1, instrument support 2, calibrated disc 3, meter hand 4, stepping motor 5, connector 6, button 7, lattice lcd screen 8 and shell 11, liner plate 10, glass 9.
As shown in Figure 2.The power supply of auto meter adopts switching power circuit to replace the linear power supply circuit, and error is little, and conversion efficiency improves, and power consumption reduces greatly, and cal val reduces greatly.Power down/null circuit cuts off the power supply back to increase pointer on the wiring board 1.Switch power supply route input circuit 3., 4. Switching Power Supply IC, output circuit form.Input circuit is 3. by 2. 1. bonded assembly reverse-connection preventing circuit, over-voltage over-current protection circuit constitute with the multiband filtering decoupling circuit that chemical capacitor in parallel is formed successively.5. the pointer power down/null circuit that cuts off the power supply back is made of the control pin of power supply monitoring, stepper motor and microcontroller.1. reverse-connection preventing circuit, over-voltage over-current protection circuit adopt positive temperature coefficient from recovering the series connection of insurance resistance and voltage transient suppressing unit among Fig. 2; absorb instantaneous high pressure; blocking-up loop excess current; thereby the input of the Switching Power Supply of blocking-up rear end; the protection switch power supply is realized over voltage, overcurrent, surge, the Electro-Static Discharge protection of vehicle.2. multiband filtering decoupling circuit adopts the capacitance gradient of different stage rated value in parallel with transient suppressor among Fig. 2, absorbs the impact of instantaneous big voltage and interference source, also plays the power protection effect.
Behind the automotive ignition lock power remove, instrument monitoring is to priming supply power down/outage, promptly give microcontroller MCU input power down/ct-off signal, microcontroller MCU output Switching Power Supply continues effective enable signal of output, because automotive battery is still being given the instrument supplying power for input end, therefore, Switching Power Supply continues output Vcc.Instrument is carried out and is preserved data, pointer returns zeroing, after reliable in action is finished, and the invalid enable signal of microcontroller MCU output Switching Power Supply output, the output of cut-out switch power supply.Instrument is in electroless state substantially, thereby the quiescent dissipation of instrument is dropped to bottom line.
As shown in Figure 3.CAN bus, button, liquid crystal display circuit figure by the CAN transceiver 6., instrument microcontroller MCU, lattice lcd screen LCD 8., 7. left and right press key constitute.7. button can press the left rotation and right rotation operation.6. the input information signal of the ECU (Electrical Control Unit) failure code that lattice lcd screen LCD need show is obtained from the collection of the on-the-spot local area control network C of automobile AN bus from the CAN transceiver, the CAN bus signals is by CAN transceiver and microcontroller MCU interface, microcontroller MCU sends the serial data that needs liquid crystal display to show and communicates by letter liquid crystal display and then demonstration information with liquid crystal display by string commentaries on classics parallel port.7. locate among the figure, if left and right press key press, during left-handed or right-handed operations, microcontroller MCU judge its respective pins by hypermutation for putting ground, so send the action of instruction execution graph 4～Fig. 6, liquid crystal display shows respective picture.Lattice lcd screen 8 is by instrument microcontroller direct drive, and not only display automobile travelled distance number can also show information such as engine electric-controlled unit failure code, presses to operate with left rotation and right rotation by button and switches and inquire about.
Claims (3)
1, a kind of vehicle electronics combination instrument, comprise the instrument circuit board (1), instrument support (2), calibrated disc (3), meter hand (4), stepping motor (5), connector (6), button (7), lattice lcd screen (8) and shell (11), liner plate (10), the glass (9) that contain microcontroller, it is characterized in that: described instrument circuit board (1) is provided with the powered switch power circuit and the pointer power down/null circuit cuts off the power supply back; This switch power supply route input circuit (3.), Switching Power Supply (IC), output circuit (4.) are formed; The multiband filtering decoupling circuit (2.) that this input circuit (3.) is made up of bonded assembly reverse-connection preventing circuit, over-voltage over-current protection circuit (1.) and chemical capacitor in parallel successively constitutes; This pointer power down/null circuit that cuts off the power supply back (5.) is made of the control pin of power supply monitoring, stepper motor and microcontroller.
2, a kind of vehicle electronics combination instrument according to claim 1 is characterized in that: described over-voltage over-current protection circuit (1.) is formed in parallel from recovering connect with voltage transient suppressing unit TVS high-power, the wave forms impact of anti-Millisecond the capacitor bank and the transient suppressor of ground connection and employing different stage rated value gradient of insurance resistance PTC by the positive temperature coefficient that high voltage withstanding value, anti-big current value, opening time is Millisecond.
3, a kind of vehicle electronics combination instrument according to claim 1, it is characterized in that: described lattice lcd screen (8) adopts the wide LCDs of dot matrix, change parallel port IC by serial ports and be connected with the instrument microcontroller, the instrument microcontroller is by CAN transceiver (6.) interface IC and the total wire joint of the on-the-spot local area control network C AN of automobile; Two buttons (7) that can press the left rotation and right rotation operation about wiring board (1) is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202411802U CN201320968Y (en) | 2008-12-27 | 2008-12-27 | Electronic combination instrument for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202411802U CN201320968Y (en) | 2008-12-27 | 2008-12-27 | Electronic combination instrument for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201320968Y true CN201320968Y (en) | 2009-10-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202411802U Expired - Fee Related CN201320968Y (en) | 2008-12-27 | 2008-12-27 | Electronic combination instrument for vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN201320968Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826925A (en) * | 2011-07-12 | 2014-05-28 | 安普泰科电子韩国有限公司 | Power connection box for hybrid vehicle |
| CN105322781A (en) * | 2014-08-27 | 2016-02-10 | 东风汽车电子有限公司 | Power supply module of variable electrical instrument |
| CN105599615A (en) * | 2016-03-08 | 2016-05-25 | 金龙联合汽车工业（苏州）有限公司 | Touch central control display system for pure electric vehicle |
| US20210098198A1 (en) * | 2018-06-28 | 2021-04-01 | Panasonic Intellectual Property Management Co., Ltd. | Power storage device, power supply device, moving body, capacitor, and method for protecting power storage device |
-
2008
- 2008-12-27 CN CNU2008202411802U patent/CN201320968Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103826925A (en) * | 2011-07-12 | 2014-05-28 | 安普泰科电子韩国有限公司 | Power connection box for hybrid vehicle |
| CN103826925B (en) * | 2011-07-12 | 2016-03-16 | 安普泰科电子韩国有限公司 | For the electric power connecting box of motor vehicle driven by mixed power |
| US9815422B2 (en) | 2011-07-12 | 2017-11-14 | Tyco Electronics Amp Korea Ltd. | Power connection box for hybrid vehicle |
| CN105322781A (en) * | 2014-08-27 | 2016-02-10 | 东风汽车电子有限公司 | Power supply module of variable electrical instrument |
| CN105322781B (en) * | 2014-08-27 | 2018-11-16 | 东风汽车电子有限公司 | A kind of power module of variable electric instrument |
| CN105599615A (en) * | 2016-03-08 | 2016-05-25 | 金龙联合汽车工业（苏州）有限公司 | Touch central control display system for pure electric vehicle |
| US20210098198A1 (en) * | 2018-06-28 | 2021-04-01 | Panasonic Intellectual Property Management Co., Ltd. | Power storage device, power supply device, moving body, capacitor, and method for protecting power storage device |
| US11955293B2 (en) * | 2018-06-28 | 2024-04-09 | Panasonic Intellectual Property Management Co., Ltd. | Power storage device, power supply device, moving body, capacitor, and method for protecting power storage device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DONGFENG AUTOMOBILE ELECTRONICS CO., LTD. Free format text: FORMER NAME: DONGFENG XIANGFAN INSTRUMENT SYSTEMS CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 441001 No. 227 East Daqing Road, Hubei, Xiangyang Patentee after: DONGFENG AUTOMOBILE ELECTRONICS CO., LTD. Address before: 441001 No. 227 East Daqing Road, Hubei, Xiangfan Patentee before: Dongfeng Xiangfan Instrument Systems Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20161227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |