CN208314529U - A kind of state acquisition circuit and the automobile using the circuit - Google Patents
A kind of state acquisition circuit and the automobile using the circuit Download PDFInfo
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- CN208314529U CN208314529U CN201821048100.1U CN201821048100U CN208314529U CN 208314529 U CN208314529 U CN 208314529U CN 201821048100 U CN201821048100 U CN 201821048100U CN 208314529 U CN208314529 U CN 208314529U
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Abstract
The utility model discloses a kind of state acquisition circuit and using the automobile of the state acquisition circuit, which includes: signal input part；After second capacitor and third capacitor, the second capacitor and the series connection of third capacitor, it is connected in parallel on the both ends of signal input part；First capacitor, it is in parallel with second capacitor；Diode clamp protects circuit, and diode clamp protection circuit is connect with the output end of the first capacitor；Signal output end protects circuit connection with diode clamp.A kind of automobile of adoption status Acquisition Circuit, including；State acquisition circuit, battery and micro-control unit.In the utility model, the module of MCU highly energy-consuming can be closed under general state, to reduce average power consumption, by state acquisition circuit timing scan, the variation of external status is found out, when signal output end output abnormality signal, it is then turned on common ADC module, guarantees the data correctness of acquisition.
Description
Technical field
The utility model relates to vehicle conditions to acquire apparatus field, and in particular to a kind of state acquisition circuit and use the shape
The automobile of state Acquisition Circuit.
Background technique
It is common such as power problems for low-voltage system during the development of every profession and trade, it is always to compare attention
Problem.The industry car-mounted terminal as where at present, low-power consumption are the emphasis of each manufacturer's concern, and the general mode taken is to close
MCU (micro-control unit) related peripherals (such as ADC module), do not acquire external status, achieve the purpose that reduce power consumption, but often
It will cause real-time data loss.
ADC (analog-digital converter) module, all remarks have relevant power consumption stream in related data handbook, such as LPC17XX
In document, ADC power consumption is indicated under different system clocks, and clock frequency is higher, and power consumption will be improved to 1.7mA；For entire low
For power consumption system, undoubtedly maximum energy consumption point.
If closing the module of MCU highly energy-consuming in due course, ADC module is closed to reduce power consumption under general state, using timing
The mode of scanning finds out the variation of external status, then opens common ADC module in abnormal cases, then can drop
Low average power consumption, and do not influence the data correctness entirely acquired.
Application publication number is that the Chinese invention patent application of CN104021662A (application No. is 201410210087.5) is public
A kind of motoring condition acquisition device, system and method based on automotive bus technology has been opened, comprising: a main control unit MCU
And a car bus interface unit, car bus interface unit are connected by car bus interface circuit with main control unit MCU；One
Vehicle device interface unit, vehicle device interface unit are connected by vehicle device interface circuit with main control unit MCU；The main control unit MCU is used
In reception and automobile bus data are read, and are obtained according to automobile bus protocol analysis automobile bus data, then by data operation
To motoring condition；Object of the car bus interface circuit for car bus interface unit and main control unit MCU communication
Level conversion in reason；Vehicle device interface circuit, it is real by MCU serial ports for completing the level conversion of main control unit MCU and vehicle device communication
Existing vehicle device Communication Control.The technical solution can obtain motoring condition from bus, then by data processing and be transferred to vehicle
Machine uses, and to user one specific intuitive motoring condition impression, but the technical solution cannot still reduce power consumption.
Utility model content
The utility model provides a kind of state acquisition circuit and the automobile using the state acquisition circuit, is guaranteeing data
Real-time under the premise of, while not influencing the data correctness entirely acquired.
A kind of state acquisition circuit, comprising:
Signal input part；
After second capacitor and third capacitor, second capacitor and the series connection of third capacitor, it is connected in parallel on the signal input
The both ends at end；
First capacitor, it is in parallel with second capacitor；
Diode clamp protects circuit, the output end company of the diode clamp protection circuit and the first capacitor
It connects；
Signal output end protects circuit connection with the diode clamp.
It in the utility model, inputs a signal into and terminates at car-mounted terminal, on Vehicular accumulator cell, can be closed under general state
The module of MCU highly energy-consuming, by state acquisition circuit timing scan, finds out the variation of external status to reduce average power consumption, when
When signal output end output abnormality signal, it is then turned on common ADC module, guarantees the data correctness of acquisition.
First capacitor (C1), may be selected different capacitances, to improve the response time of circuit, select smaller capacitor
Value can get faster accordingly, and consider the pressure voltage of capacitor element.
The described diode clamp protection circuit includes concatenated first zener diode and the second zener diode, described
The anode of the first zener diode connected with the cathode of the second zener diode, the cathode of first zener diode company
It is connected to voltage source, the plus earth of second zener diode.
The first capacitor and the second capacitor has one end ground connection, and one end ground connection of the first capacitor is described
Output end of the other end of first capacitor as the first capacitor, one end ground connection of second capacitor, described second
The other end of capacitor and the third capacitance connection.
One first is in series between the output end of the first capacitor and the cathode of second zener diode
Resistance.
Signal output end of the both ends of first zener diode as state acquisition circuit.
The both ends of first zener diode are connect with micro-control unit (MCU) simultaneously.
A kind of automobile of adoption status Acquisition Circuit, including；State acquisition circuit, battery and micro-control unit (MCU),
The signal input part of the state acquisition circuit and the positive and negative anodes of battery connect, and the signal of the state acquisition circuit is defeated
Outlet is connect with micro-control unit (MCU).
Compared with prior art, the present invention has the advantage that
It in the utility model, inputs a signal into and terminates at car-mounted terminal, on Vehicular accumulator cell, can be closed under general state
The module of MCU highly energy-consuming, by state acquisition circuit timing scan, finds out the variation of external status to reduce average power consumption, when
When signal output end output abnormality signal, it is then turned on common ADC module, guarantees the data correctness of acquisition, can be applied to
Common low-power dissipation system, car-mounted terminal, battery abnormal monitoring etc. have broad application prospects.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model state acquisition circuit；
Fig. 2 is using the utility model state acquisition circuit Simulation results schematic diagram.
Specific embodiment
The utility model state acquisition circuit is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of state acquisition circuit, comprising: signal input part 1；Second capacitor C2 and third capacitor C3, the
After two capacitor C2 and third capacitor C3 series connection, it is connected in parallel on the both ends of signal input part 1；First capacitor C1, simultaneously with the second capacitor C2
Connection；Diode clamp protects circuit, and diode clamp protection circuit is connect with the output end of first capacitor C1；Signal output end 2,
Circuit connection is protected with diode clamp.
Different capacitances may be selected in first capacitor C1, to improve the response time of circuit, selects smaller capacitance,
It is available corresponding faster, and consider the pressure voltage of capacitor element.
In the present embodiment, first capacitor C1, the second capacitor C2 and third capacitor C3 are 1uF.
Diode clamp protection circuit includes concatenated first zener diode D1 and the second zener diode D2, and first is steady
The anode of pressure diode D1 is connected with the cathode of the second zener diode D2, and the cathode of the first zener diode D1 is connected with voltage
Source VCC (3.3V specifically may be selected in voltage), the plus earth of the second zener diode D2.
First capacitor C1 and the second capacitor C2 has one end ground connection, and the unearthed one end first capacitor C1 is first capacitor C1
Output end, the output end of first capacitor C1 connect with the cathode of the second zener diode D2.The output end of first capacitor C1 with
A resistance R1 is in series between the cathode of second zener diode D2.
Signal output end 2 of the both ends of first zener diode D1 as state acquisition circuit.
A kind of automobile of adoption status Acquisition Circuit, including；State acquisition circuit, battery and micro-control unit (MCU),
The signal input part 1 of state acquisition circuit is connect with the positive and negative anodes of battery, the signal output end 2 and micro-control of state acquisition circuit
Unit (MCU) connection processed.The signal input part 1 of state acquisition circuit connects on the positive and negative anodes of battery, and level is sprung up, edge electricity
Flat variation or level mutation, MCU can configure I/O port interrupt mode, in this way, the variation of signal input part, so that it may be obtained by MCU
It takes, to start corresponding module, such as opens common ADC module, guarantee the data correctness of acquisition.
In the utility model, inputs a signal into end and 1 connect on Vehicular accumulator cell, by state acquisition circuit timing scan,
The module of MCU highly energy-consuming can be closed under general state, to reduce average power consumption, finds out the variation of external status, when signal exports
When holding 2 output abnormality signal, it is then turned on common ADC module, guarantees the data correctness of acquisition.
Adoption status Acquisition Circuit carries out circuit simulation, simulates extraneous level change, and signal input part 1 is connected with level touching
It rises, signal output end 2 is connected with oscillograph, acquires the waveform variation of analog circuit.Voltage is 3.3V, circuit simulation when emulation
As shown in figure 2 above, black line indicates that input terminal, straight line indicate VCC (3.3V), and light grey line indicates output end；Wherein, ordinate
For voltage, the every lattice of input terminal ordinate scale 10V, VCC and the every lattice of output end scale 2V, abscissa are time shaft, are that 20mS is every
Lattice.
When system acquisition is to abnormality, level translation, the end MCU will occur for system, and settable interrupt mode obtains different
Normal state, notice system open ADC module detection, acquire analog value.
The response type time of whole system is extremely short, can obtain external status variation in real time, upper as shown in the figure, A condition, emulation
External status level change is simulated, output state changes, and the front and back response time is very short, and emulation final state is stablized, output
State also tends towards stability.
The technical solution of the utility model and beneficial effect is described in detail in above-described specific embodiment,
It should be understood that be not intended to limit the utility model the foregoing is merely the most preferred embodiment of the utility model, it is all at this
Any modification, supplementary, and equivalent replacement etc. done in the spirit of utility model, should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. a kind of state acquisition circuit characterized by comprising
Signal input part；
After second capacitor and third capacitor, second capacitor and the series connection of third capacitor, it is connected in parallel on the signal input part
Both ends；
First capacitor, it is in parallel with second capacitor；
Diode clamp protects circuit, and the diode clamp protection circuit is connect with the output end of the first capacitor；
Signal output end protects circuit connection with the diode clamp.
2. state acquisition circuit according to claim 1, which is characterized in that the described diode clamp protection circuit includes
Concatenated first zener diode and the second zener diode, the anode of first zener diode and two pole of the second pressure stabilizing
The cathode of pipe connects, and the cathode of first zener diode is connected with voltage source, and second zener diode is just
Pole ground connection.
3. state acquisition circuit according to claim 2, which is characterized in that one end of the first capacitor is grounded, institute
Output end of the other end for the first capacitor stated as the first capacitor；
One end of second capacitor is grounded, the other end of second capacitor and the third capacitance connection.
4. state acquisition circuit according to claim 3, which is characterized in that the output end of the first capacitor with it is described
A resistance is in series between the cathode of second zener diode.
5. state acquisition circuit according to claim 3, which is characterized in that make at the both ends of first zener diode
For the signal output end of the state acquisition circuit.
6. a kind of automobile of adoption status Acquisition Circuit, which is characterized in that including；Battery, micro-control unit and claim 1
~5 described in any item state acquisition circuits, the signal input part of the state acquisition circuit are positive and negative with the battery
Pole connection, the signal output end of the state acquisition circuit are connect with micro-control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821048100.1U CN208314529U (en) | 2018-07-03 | 2018-07-03 | A kind of state acquisition circuit and the automobile using the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821048100.1U CN208314529U (en) | 2018-07-03 | 2018-07-03 | A kind of state acquisition circuit and the automobile using the circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208314529U true CN208314529U (en) | 2019-01-01 |
Family
ID=64717391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821048100.1U Active CN208314529U (en) | 2018-07-03 | 2018-07-03 | A kind of state acquisition circuit and the automobile using the circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208314529U (en) |
-
2018
- 2018-07-03 CN CN201821048100.1U patent/CN208314529U/en active Active
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