CN204367894U - The automobile combination meter that a kind of sample circuit is optimized - Google Patents
The automobile combination meter that a kind of sample circuit is optimized Download PDFInfo
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- CN204367894U CN204367894U CN201420661608.4U CN201420661608U CN204367894U CN 204367894 U CN204367894 U CN 204367894U CN 201420661608 U CN201420661608 U CN 201420661608U CN 204367894 U CN204367894 U CN 204367894U
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Abstract
Name of the present utility model is called the automobile combination meter that a kind of sample circuit is optimized.Belong to vehicle instrument display device technical field.It mainly solves gauge sensor analogue signal acquisition circuit exists and can not provide available protecting or the uneconomic problem of implementation to high potential, strong jamming.Its principal character is: on instrument circuit board, be integrated with oil mass Acquisition Circuit, water temperature Acquisition Circuit, oil pressure Acquisition Circuit, the first air pressure acquisition circuit, the second air pressure acquisition circuit; Form by the resistor voltage divider circuit connected successively, filter circuit, overvoltage crowbar, resistor voltage divider circuit input end is connected with connector terminals, and the signal AD acquisition port that filter circuit mouth is corresponding with microcontroller connects; Instrument power protective circuit is connected with between the power end and the power end of overvoltage crowbar of resistor voltage divider circuit.The utility model has realization convenience, protection is reliable, and low cost realizes the feature of car load instrument function, is mainly used in automobile electronic combined instrument.
Description
Technical field
The utility model belongs to vehicle instrument display device technical field.Be specifically related to the automobile electronic combined instrument that a kind of sample circuit is optimized.
Background technology
The combination instrument of existing automobile is usually from the various sensor numbers of winning the confidence that automobile is installed, and automobile sensor signal has the polytypes such as resistance, voltage, frequency, and installation site spreads all over each position of automobile, and operating mode is relatively more severe, disturbs more.And the sample circuit of automobile combination meter is directly from the automobile sensor number of winning the confidence, if inconsiderate to interfering signal on the design protection of sample circuit, interfering signal will be introduced combination instrument inside and cause instrument to damage or reliability decrease.On the other hand due to auto trade competition, the cost requirement for automobile combination meter is also more and more higher, if the protective circuit device adopted increases more, certainly will increase extra cost, reduces the competitive power of combination instrument.Therefore automobile combination meter needs a kind of not only had reliably protecting function but also economical and practical collecting sensor signal circuit.
Summary of the invention
The purpose of this utility model is exactly the automobile electronic combined instrument after a kind of sample circuit optimization designed for above-mentioned deficiency; can either the sensor analog signals Acquisition Circuit of available protecting gauge internal; prevent combination instrument to lose efficacy or damage; greatly improve the reliability of combination instrument work; the components and parts simultaneously increased are little, economical and practical.
Technical solution of the present utility model is: the automobile combination meter that a kind of sample circuit is optimized, comprise the instrument circuit board containing microcontroller, instrument support, calibrated disc, meter hand, stepping motor, connector terminals, button, section liquid crystal display and shell, liner plate, glass, instrument circuit board is integrated with the oil mass signal AD acquisition port be connected with microcontroller, water temperature signal AD acquisition port, fuel injection pressure signal AD acquisition port, first air pressure signal AD acquisition port and the second air pressure signal AD acquisition port, it is characterized in that: on described instrument circuit board, be integrated with oil mass Acquisition Circuit, water temperature Acquisition Circuit, oil pressure Acquisition Circuit, first air pressure acquisition circuit, second air pressure acquisition circuit, this oil mass Acquisition Circuit, water temperature Acquisition Circuit, oil pressure Acquisition Circuit, the first air pressure acquisition circuit and the second air pressure acquisition circuit are formed by the resistor voltage divider circuit be connected successively, filter circuit, overvoltage crowbar, resistor voltage divider circuit input end is connected with connector terminals, and the signal AD acquisition port that filter circuit mouth is corresponding with microcontroller connects, the instrument power protective circuit be made up of the second diode is connected with between the power end and the power end of overvoltage crowbar of resistor voltage divider circuit.
Resistor voltage divider circuit described in technical solution of the present utility model is made up of first resistance of connecting and the second resistance, and the first resistance is connected with power Vcc _ ref; Described filtered electrical routing capacitance is formed, and this electric capacity is connected with the coupling end between the first resistance, the second resistance through the 3rd resistance; Described overvoltage crowbar is made up of the first diode, and the first diode cathode end is connected with power Vcc, and positive terminal is connected with the coupling end between the 3rd resistance, electric capacity; The second described diode cathode end is connected with power Vcc _ ref, and positive terminal is connected with power Vcc.
Connector terminals described in technical solution of the present utility model comprises the first connector terminals and the second connector terminals, oil mass signal AD acquisition port, water temperature signal AD acquisition port are connected with the first connector terminals respectively, and fuel injection pressure signal AD acquisition port, the first air pressure signal AD acquisition port are connected with the second connector terminals respectively with the second air pressure signal AD acquisition port.
The beneficial effects of the utility model are, can prevent from, because high voltage induction gauge internal is caused the damage of microcontroller and power circuit by sensor fault or car load line fault, improve the reliability of combination instrument by protective circuit.The utility model has realization convenience, protection is reliable, and low cost realizes the feature of car load instrument function.The utility model is mainly used in automobile electronic combined instrument.
Accompanying drawing explanation
Fig. 1 is overall diagram of the present utility model.
Fig. 2 is analog sensor signal end subgraph of the present utility model.
Fig. 3 is collecting sensor signal circuit diagram of the present utility model.
Detailed description of the invention
As shown in Figure 1.The utility model combination instrument is formed by containing the instrument circuit board of microcontroller, instrument support, calibrated disc, meter hand, stepping motor, button, pen section liquid crystal display and shell, liner plate, glass, same as the prior art.Liquid crystal display is positioned at the below in the middle part of instrument.
As shown in Figure 2.The connector position of the sensor die analog quantity signal of the utility model combination instrument access as shown in the figure, be respectively the first connector 1 and the second connector 2 two connectors, wherein the first connector 1 is integrated with oil mass signal input port, water temperature signal input port, the second connector 2 is integrated with fuel injection pressure signal input port, the first air pressure signal input port, the second air pressure signal input port.
As shown in Figure 3.Sensor analog signals Acquisition Circuit has 5 tunnels, is integrated on instrument circuit board.Be respectively oil mass signal Acquisition Circuit, water temperature signal Acquisition Circuit, fuel injection pressure signal Acquisition Circuit, the first air pressure signal Acquisition Circuit and the second air pressure signal Acquisition Circuit.
Oil mass signal Acquisition Circuit is made up of resistance R1, R3, R5, electric capacity C1, diode DL1A.Comprise three resistance R1, R3, R5 being connected with oil mass signal input end 3; the resistance R1 other end is connected with power Vcc _ ref; the resistance R5 other end is connected with the oil mass signal AD acquisition port of microcontroller; resistance R3 other end ground connection; be connected with the protective circuit be made up of diode DL1A between power Vcc and oil mass signal AD acquisition port, between oil mass signal AD acquisition port and ground, be connected with the filter circuit be made up of electric capacity C1.
Water temperature signal Acquisition Circuit is made up of resistance R2, R4, R6, electric capacity C2, diode DL1B.Comprise three resistance R2, R4, R6 being connected with water temperature signal input end 4; the resistance R2 other end is connected with power Vcc _ ref; the resistance R6 other end is connected with the water temperature signal AD acquisition port of microcontroller; resistance R4 other end ground connection; be connected with the protective circuit be made up of diode DL1B between power Vcc and water temperature signal AD acquisition port, between water temperature signal AD acquisition port and ground, be connected with the filter circuit be made up of electric capacity C2.
Fuel injection pressure signal Acquisition Circuit is made up of resistance R7, R10, R11, electric capacity C3, diode DL2A.Comprise three resistance R7, R10, R11 being connected with fuel injection pressure signal input end 5; the resistance R10 other end is connected with power Vcc _ ref; the resistance R7 other end is connected with the fuel injection pressure signal AD acquisition port of microcontroller; resistance R11 other end ground connection; be connected with the protective circuit be made up of diode DL2A between power Vcc and fuel injection pressure signal AD acquisition port, between fuel injection pressure signal AD acquisition port and ground, be connected with the filter circuit be made up of electric capacity C3.
First air pressure signal Acquisition Circuit is made up of resistance R8, R12, R14, electric capacity C4, diode DL2B.Comprise three resistance R8, R12, R14 being connected with the first air pressure signal input end 6; the resistance R12 other end is connected with power Vcc _ ref; the resistance R8 other end is connected with the first air pressure signal AD acquisition port of microcontroller; resistance R14 other end ground connection; be connected with the protective circuit be made up of diode DL2B between power Vcc and the first air pressure signal AD acquisition port, between the first air pressure signal AD acquisition port and ground, be connected with the filter circuit be made up of electric capacity C4.First air pressure 8 is input to the first air pressure signal AD acquisition port.
Second air pressure signal Acquisition Circuit is made up of resistance R9, R13, R15, electric capacity C5, diode DL3A.Comprise three resistance R9, R13, R15 being connected with air pressure 2 signal input part 7; the resistance R13 other end is connected with power Vcc _ ref; the resistance R9 other end is connected with the second air pressure signal AD acquisition port of microcontroller; resistance R15 other end ground connection; be connected with the protective circuit be made up of diode DL3A between power Vcc and the second air pressure signal AD acquisition port, between the second air pressure signal AD acquisition port and ground, be connected with the filter circuit be made up of electric capacity C5.Second air pressure 9 is input to the second air pressure signal AD acquisition port.
Instrument power protective circuit is made up of diode DL4, and be public protective circuit, diode DL4 two ends are connected with power Vcc, power Vcc _ ref respectively.
Wherein, resistance R1 ~ R4, R10 ~ R15 are resistors match circuit, and so that resistance type sensor signal is converted to suitable voltage signal, the sensor signal itself being voltage type remains on a stable voltage.Resistance R5 ~ R9 and electric capacity C1 ~ C5 forms filter circuit jointly, the noise jamming on filtering circuit.Diode DL1A, DL1B, DL2A, DL2B and DL3A form the overvoltage crowbar to microcontroller ports jointly, carry out clamped, prevent microcontroller ports from damaging because of overvoltage to the signal voltage amplitude sent into.Diode DL4 forms instrument power protective circuit, prevents overvoltage from scurrying into Vcc electrical voltage system and causes instrument power partial destruction.
Claims (3)
1. the automobile combination meter of a sample circuit optimization, comprise the instrument circuit board containing microcontroller, instrument support, calibrated disc, meter hand, stepping motor, connector terminals, button, section liquid crystal display and shell, liner plate, glass, instrument circuit board is integrated with the oil mass signal AD acquisition port be connected with microcontroller, water temperature signal AD acquisition port, fuel injection pressure signal AD acquisition port, first air pressure signal AD acquisition port and the second air pressure signal AD acquisition port, it is characterized in that: on described instrument circuit board, be integrated with oil mass Acquisition Circuit, water temperature Acquisition Circuit, oil pressure Acquisition Circuit, first air pressure acquisition circuit, second air pressure acquisition circuit, this oil mass Acquisition Circuit, water temperature Acquisition Circuit, oil pressure Acquisition Circuit, the first air pressure acquisition circuit and the second air pressure acquisition circuit are formed by the resistor voltage divider circuit be connected successively, filter circuit, overvoltage crowbar, resistor voltage divider circuit input end is connected with connector terminals, and the signal AD acquisition port that filter circuit mouth is corresponding with microcontroller connects, the instrument power protective circuit be made up of the second diode is connected with between the power end and the power end of overvoltage crowbar of resistor voltage divider circuit.
2. the automobile combination meter of a kind of sample circuit optimization according to claim 1, is characterized in that: described resistor voltage divider circuit is made up of first resistance of connecting and the second resistance, and the first resistance is connected with power Vcc _ ref; Described filtered electrical routing capacitance is formed, and this electric capacity is connected with the coupling end between the first resistance, the second resistance through the 3rd resistance; Described overvoltage crowbar is made up of the first diode, and the first diode cathode end is connected with power Vcc, and positive terminal is connected with the coupling end between the 3rd resistance, electric capacity; The second described diode cathode end is connected with power Vcc _ ref, and positive terminal is connected with power Vcc.
3. the automobile combination meter of a kind of sample circuit optimization according to claim 1 and 2, it is characterized in that: described connector terminals comprises the first connector terminals and the second connector terminals, oil mass signal AD acquisition port, water temperature signal AD acquisition port are connected with the first connector terminals respectively, and fuel injection pressure signal AD acquisition port, the first air pressure signal AD acquisition port are connected with the second connector terminals respectively with the second air pressure signal AD acquisition port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420661608.4U CN204367894U (en) | 2014-11-07 | 2014-11-07 | The automobile combination meter that a kind of sample circuit is optimized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420661608.4U CN204367894U (en) | 2014-11-07 | 2014-11-07 | The automobile combination meter that a kind of sample circuit is optimized |
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| Publication Number | Publication Date |
|---|---|
| CN204367894U true CN204367894U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420661608.4U Active CN204367894U (en) | 2014-11-07 | 2014-11-07 | The automobile combination meter that a kind of sample circuit is optimized |
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| CN (1) | CN204367894U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721634A (en) * | 2020-12-04 | 2021-04-30 | 深圳市道和实业有限公司 | New energy automobile intelligent instrument control system |
-
2014
- 2014-11-07 CN CN201420661608.4U patent/CN204367894U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112721634A (en) * | 2020-12-04 | 2021-04-30 | 深圳市道和实业有限公司 | New energy automobile intelligent instrument control system |
| CN112721634B (en) * | 2020-12-04 | 2022-06-21 | 深圳市道和实业有限公司 | New energy automobile intelligent instrument control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 441000 Jiangshan South Road Venture Center, Xiangyang High-tech Zone, Hubei Province Patentee after: Dongfeng Power Drive System Co., Ltd. Address before: 441001 No. 227 Daqing East Road, Xiangfan City, Hubei Province Patentee before: DONGFENG AUTOMOBILE ELECTRONICS CO., LTD. |
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| CP03 | Change of name, title or address |