CN203519640U - Acceleration sensor interface circuit - Google Patents
Acceleration sensor interface circuit Download PDFInfo
- Publication number
- CN203519640U CN203519640U CN201320655038.3U CN201320655038U CN203519640U CN 203519640 U CN203519640 U CN 203519640U CN 201320655038 U CN201320655038 U CN 201320655038U CN 203519640 U CN203519640 U CN 203519640U
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- Prior art keywords
- resistance
- operational amplifier
- interface circuit
- filter circuit
- phase input
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Abstract
The utility model discloses an acceleration sensor interface circuit which comprises a shaping filter circuit and an operational amplifier. A resistor R4 is connected between the in-phase input end and the in-phase output end of the operational amplifier. The in-phase input end of the operational amplifier is connected to the cathode of a diode. The anode of the diode is grounded. A resistor R4 is connected between the input port of the shaping filter circuit and a power supply. The output end of the shaping filter circuit is connected to the in-phase input end of the operational amplifier. The acceleration sensor interface circuit has the advantages that a collected signal is subjected to filtering shaping and delay hysteresis comparison, thus data is not lost in the condition that a wheel speed is very low, and the reliability of the data is ensured.
Description
Technical field
The utility model relates to a kind of interface circuit, relates in particular a kind of acceleration transducer interface circuit.
Background technology
Acceleration transducer is a kind of electronic equipment that can acceleration measurement power.It is widely used in the various electronic such as automobile, mobile phone, PAD.For example be used in upset detection, collision detection, brake control system etc.When to wheel speed information, if wheel speed is extremely low, be easy to cause the loss of data, the monitoring of acceleration is impacted, make to monitor out of true.
Utility model content
The utility model provides a kind of acceleration transducer interface circuit, and it carries out filter shape and relatively sluggish to the signal gathering, and wheel speed data under extremely low rotating speed also can not lost, and guarantees the reliability of data.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
Acceleration transducer interface circuit, it comprises plastic filter circuit and operational amplifier; Between the in-phase input end of described operational amplifier and output terminal, be connected with resistance R 4; The in-phase input end of described operational amplifier connects on the negative pole of diode, the plus earth of described diode; Between the input port of described plastic filter circuit and power supply, be connected with resistance R 1, the output terminal of described plastic filter circuit is connected on the in-phase input end of operational amplifier.In the utility model, operational amplifier and resistance R 4 form hysteresis comparator circuit, and the voltage of diode pair operational amplifier in-phase input end carries out clamper, and operational amplifier is protected.Adopt filtering shaping circuit and hysteresis comparator circuit to carry out acquisition and processing to data, can effectively guarantee not losing of data, even in the situation that tach signal is extremely low, guarantee the reliability of data.
Further technical scheme is:
As preferably, described plastic filter circuit comprises resistance R 2, resistance R 3 and electric capacity, one end ground connection of described electric capacity, and the other end is connected with resistance R 3 with resistance R 2 simultaneously.In the utility model, utilize effective combination of resistance and electric capacity, reach the effect of filter shape, its circuit structure is simple, with low cost.
Further, be also connected with resistance R 5 on the output terminal of described operational amplifier, the other end of described resistance R 5 is connected on power supply.
As preferably, described operational amplifier is LM139.
As preferably, the resistance of described resistance R 4 is 6 megohms.
Compared with prior art, the beneficial effects of the utility model are: the signal to collection of the present utility model carries out filter shape and relatively sluggish successively, and wheel speed data under extremely low rotating speed also can not lost, and guarantees the reliability of data.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Embodiment of the present utility model includes but not limited to the following example.
[embodiment]
Acceleration transducer interface circuit as shown in Figure 1, it comprises plastic filter circuit and operational amplifier; Between the in-phase input end of described operational amplifier and output terminal, be connected with resistance R 4; The in-phase input end of described operational amplifier connects on the negative pole of diode, the plus earth of described diode; Between the input port of described plastic filter circuit and power supply, be connected with resistance R 1, the output terminal of described plastic filter circuit is connected on the in-phase input end of operational amplifier.
Described plastic filter circuit comprises resistance R 2, resistance R 3 and electric capacity, one end ground connection of described electric capacity, and the other end is connected with resistance R 3 with resistance R 2 simultaneously.
On the output terminal of described operational amplifier, be also connected with resistance R 5, the other end of described resistance R 5 is connected on power supply.
Described operational amplifier is LM139.
The resistance of described resistance R 4 is 6 megohms.
The course of work of the present embodiment is as follows:
Operational amplifier and resistance R 4 form hysteresis comparator circuit, and the voltage of diode pair operational amplifier in-phase input end carries out clamper, avoids overtension to damage operational amplifier.Wheel wheel speed information enters from one end of resistance R 2, successively through filtering shaping circuit and hysteresis comparator circuit, can effectively guarantee not losing of data, even in the situation that tach signal is extremely low, guarantees the reliability of data.
According to the above embodiments, can well complete the utility model.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection domain of the present utility model.
Claims (5)
1. acceleration transducer interface circuit, is characterized in that: it comprises plastic filter circuit and operational amplifier; Between the in-phase input end of described operational amplifier and output terminal, be connected with resistance R 4; The in-phase input end of described operational amplifier connects on the negative pole of diode, the plus earth of described diode; Between the input port of described plastic filter circuit and power supply, be connected with resistance R 1, the output terminal of described plastic filter circuit is connected on the in-phase input end of operational amplifier.
2. acceleration transducer interface circuit according to claim 1, is characterized in that: described plastic filter circuit comprises resistance R 2, resistance R 3 and electric capacity, one end ground connection of described electric capacity, and the other end is connected with resistance R 3 with resistance R 2 simultaneously.
3. acceleration transducer interface circuit according to claim 1 and 2, is characterized in that: on the output terminal of described operational amplifier, be also connected with resistance R 5, the other end of described resistance R 5 is connected on power supply.
4. acceleration transducer interface circuit according to claim 1, is characterized in that: described operational amplifier is LM139.
5. acceleration transducer interface circuit according to claim 1, is characterized in that: the resistance of described resistance R 4 is 6 megohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320655038.3U CN203519640U (en) | 2013-10-23 | 2013-10-23 | Acceleration sensor interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320655038.3U CN203519640U (en) | 2013-10-23 | 2013-10-23 | Acceleration sensor interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203519640U true CN203519640U (en) | 2014-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320655038.3U Expired - Fee Related CN203519640U (en) | 2013-10-23 | 2013-10-23 | Acceleration sensor interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203519640U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529241A (en) * | 2013-10-23 | 2014-01-22 | 成都市宏山科技有限公司 | Interface circuit for acceleration sensor |
| CN108757189A (en) * | 2018-06-04 | 2018-11-06 | 广西玉柴机器股份有限公司 | The signal amplification circuit of diesel engine throttle position |
-
2013
- 2013-10-23 CN CN201320655038.3U patent/CN203519640U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529241A (en) * | 2013-10-23 | 2014-01-22 | 成都市宏山科技有限公司 | Interface circuit for acceleration sensor |
| CN108757189A (en) * | 2018-06-04 | 2018-11-06 | 广西玉柴机器股份有限公司 | The signal amplification circuit of diesel engine throttle position |
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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: 20140402 Termination date: 20141023 |
|
| EXPY | Termination of patent right or utility model |