CN102539878A - Voltage sampling circuit, and filament breakage detecting device of automotive steering lamp employing such voltage sampling circuit - Google Patents
Voltage sampling circuit, and filament breakage detecting device of automotive steering lamp employing such voltage sampling circuit Download PDFInfo
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- CN102539878A CN102539878A CN2010106075338A CN201010607533A CN102539878A CN 102539878 A CN102539878 A CN 102539878A CN 2010106075338 A CN2010106075338 A CN 2010106075338A CN 201010607533 A CN201010607533 A CN 201010607533A CN 102539878 A CN102539878 A CN 102539878A
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Abstract
The invention discloses a voltage sampling circuit, which comprises two paths of sampling circuit units, a voltage dividing resistor and a micro-processing unit, wherein each path of the sampling circuit unit comprises a voltage input end, a voltage output end, a control signal input end, a triode amplifying circuit connected between the voltage input end and the voltage output end and a switch circuit connected between the control signal input end and the triode amplifying circuit and used for controlling the triode amplifying circuit; one end of the voltage dividing resistor is connected with the voltage output ends of the two paths of sampling circuit units; and the micro-processing unit comprises a voltage signal receiving end which is connected to the other end of the voltage dividing resistor, a control signal output end which is connected to the control signal input ends of the two paths of sampling circuit units and used for controlling the two paths of sampling circuit units in a time-shared way, and a differential comparing module which is used for differentially comparing voltage signals acquired by the two paths of sampling circuit units through time-shared sampling. The voltage sampling circuit has the advantages of simple structure and stable performance. The invention further provides a filament breakage detecting device of an automotive steering lamp employing the voltage sampling circuit.
Description
Technical field
The present invention relates to a kind of voltage sampling circuit, relate in particular to a kind of flasher circuit wire detecting device of this voltage sampling circuit of application.
Background technology
The existing voltage sampling circuit that is used for the detection of flasher fracture of wire adopts the mode of difference amplifying signal to realize usually.This voltage sampling circuit comprises the voltage follower at the sample resistance two ends that are connected in the steering indicating light circuit, and the voltage comparator that links to each other with the output terminal of voltage follower.The pressure difference that the voltage of voltage comparator comparison two-way input and output are exaggerated can judge according to this pressure difference whether steering indicating light the fracture of wire phenomenon takes place.The body control system of automobile sends alerting signal according to the result of this pressure difference and judgement, reminds the motorist to change and turns to bulb.Yet the pressure difference that above-mentioned voltage sampling circuit can only obtain to be exaggerated can not obtain the magnitude of voltage before and after the sample resistance, and structure is comparatively complicated, its stable Effect of Environmental such as temperature that receives easily.
Summary of the invention
In view of foregoing, be necessary to provide a kind of simple in structure, voltage sampling circuit of stable performance and the flasher circuit wire detecting device of using this voltage sampling circuit.
A kind of voltage sampling circuit; Comprise two-way sample circuit unit; Sample circuit unit, every road comprises voltage input end, voltage output end, signal input end, is connected in the transistor amplifier between voltage input end and the voltage output end, and is connected in the on-off circuit that is used to control transistor amplifier between signal input end and the transistor amplifier; Divider resistance, the one of which end is connected with the voltage output end of two-way sample circuit unit; And microprocessing unit; Comprise that the voltage signal receiving end that is connected to the divider resistance other end, the signal input end that is connected to two-way sample circuit unit are used for the control signal output ends that this two-way sample circuit unit is controlled in timesharing; And the difference comparison module, this difference comparison module is used for the voltage signal that this two-way sample circuit unit time sharing sampling obtains is carried out differential ratio.
A kind of flasher circuit wire detecting device, this motor turning circuit for lamp comprises a sample resistance that is series in the steering indicating light road.This flasher circuit wire detecting device comprises: two-way sample circuit unit; Sample circuit unit, every road comprises voltage input end, voltage output end, signal input end, is connected in the transistor amplifier between this voltage input end and the voltage output end; And being connected in the on-off circuit that is used to control transistor amplifier between signal input end and the transistor amplifier, the voltage input end of this two-way sample circuit unit is connected to the two ends of sample resistance respectively; Divider resistance, the one of which end is connected with the voltage output end of two-way sample circuit unit; And microprocessing unit; Comprise that the voltage signal receiving end that is connected to this divider resistance other end, the signal input end that is connected to this two-way sample circuit unit are used for the control signal output ends that this two-way sample circuit unit is controlled in timesharing; And the difference comparison module, this difference comparison module is used for the voltage signal that two-way sample circuit unit time sharing sampling obtains is carried out differential ratio to judge whether fracture of wire of steering indicating light filament.
The magnitude of voltage at the time sharing sampling sample resistance two ends, two-way sample circuit unit of above-mentioned voltage sampling circuit; The variation of external environment condition is with being reflected in simultaneously in the voltage signal that obtains in this two-way sample circuit unit; Through microprocessing unit this two-way voltage signal is carried out differential ratio; Can eliminate the error that environmental factor causes, thereby improve measurement stability.In addition, voltage sampling circuit unit by using microprocessing unit carries out differential ratio, and two-way sample circuit units shared divider resistance, has simplified hardware configuration, can reduce cost.
Description of drawings
Fig. 1 is the functional block diagram of the voltage sampling circuit of embodiment of the present invention.
Fig. 2 is the partial circuit figure that uses the flasher circuit wire detecting device of voltage sampling circuit shown in Figure 1.
The main element symbol description
| |
100 |
| The |
11 |
| |
12 |
| The A/D |
14 |
| |
15 |
| |
112 |
| |
113 |
| |
114 |
| |
115 |
| On-off |
116 |
| Triode | Q1、Q2 |
| Resistance | R1、R2、R3、R4、R5、R6 |
| Sample resistance | R7 |
| The voltage |
151 |
| Control signal output ends | 152 |
| The |
153 |
| The software filtering module | 154 |
| Car light | L1、L2 |
| Switch | K |
Embodiment
See also Fig. 1, the voltage sampling circuit 100 of embodiment of the present invention comprises: two-way sample circuit unit 11, divider resistance 12, A/D modular converter 14, and microprocessing unit 15.Two-way sample circuit unit 11 shared divider resistances 12, microprocessing unit 15 control two-way sample circuit unit 11 carry out time sharing sampling, and the voltage signal that two-way sample circuit unit 11 is obtained carries out differential ratio.
Please be simultaneously referring to Fig. 2; Sample circuit unit, every road 11 comprises voltage input end 112, voltage output end 113, signal input end 114, is connected in the transistor amplifier 115 between voltage input end 112 and the voltage output end 113, and is connected in the on-off circuit 116 that is used to control transistor amplifier 115 between signal input end 114 and the transistor amplifier 115.
On-off circuit 116 comprises a triode Q2.Be connected resistance R 2 between the base stage of the collector of triode Q2 and triode Q1.Be connected resistance R 3 between the grounded emitter of triode Q2, base stage and signal input end 114.Be connected resistance R 4 between the base stage of triode Q2 and the earth terminal.
Further, microprocessing unit 15 also comprises software filtering module 154, is used for the voltage signal from 151 inputs of voltage signal receiving end is carried out filtering, thereby obtains more accurate measurement result.
Use the flasher circuit wire detecting device of above-mentioned voltage sampling circuit 100, be used to detect the flasher filament and the fracture of wire situation whether occurs.Specifically in this embodiment, the motor turning circuit for lamp comprises two car light L1, the L2 that is connected in parallel, and control car light L1, L2 opens and the K switch of managing, and sample resistance R7.The voltage input end 112 of two-way sample circuit unit 11 is connected to the two ends of sample resistance R7 respectively.The voltage that the difference comparison module 153 of microprocessing unit 15 obtains two-way sample circuit unit 11 time sharing samplings carries out differential ratio to judge whether to occur fracture of wire.
Voltage sampling circuit of the present invention 100 two-way sample circuit unit 11 adopt the magnitude of voltage at 11 time sharing sampling sample resistance R7 two ends, two-way sample circuit unit; The variation of external environment condition; Such as variation of temperature with being reflected in simultaneously in this two-way sample circuit unit 11; Through microprocessing unit 15 voltage signal that this two-way sample circuit unit 11 obtains is carried out differential ratio, can eliminate the measuring error that environmental factor causes, thereby improve stability.In addition, voltage sampling circuit 100 microprocessing units 15 capable of using carry out differential ratio and digital filtering, and two-way sample circuit units shared divider resistance, have simplified hardware configuration, cost is lower.It is less that voltage sampling circuit 100 also can be fit to be applied to sample resistance, and dividing potential drop is less, for example less than taking a sample under the following situation of 100mv.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, these all should be included in the present invention's scope required for protection according to the variation that the present invention's spirit is done.
Claims (8)
1. voltage sampling circuit comprises:
Two-way sample circuit unit; Sample circuit unit, every road comprises voltage input end, voltage output end, signal input end, is connected in the transistor amplifier between this voltage input end and the voltage output end, and is connected in the on-off circuit that is used to control transistor amplifier between signal input end and the transistor amplifier;
Divider resistance, the one of which end is connected with the voltage output end of two-way sample circuit unit; And
Microprocessing unit; Comprise that the voltage signal receiving end that is connected to this divider resistance other end, the signal input end that is connected to this two-way sample circuit unit are used for the control signal output ends that this two-way sample circuit unit is controlled in timesharing; And the difference comparison module, this difference comparison module is used for the voltage signal that this two-way sample circuit unit time sharing sampling obtains is carried out differential ratio.
2. voltage sampling circuit as claimed in claim 1 is characterized in that: this on-off circuit is a transistor switching circuit.
3. voltage sampling circuit as claimed in claim 1 is characterized in that: this microprocessing unit also comprises the software filtering module, is used for the voltage signal from this voltage signal receiving end input is carried out filtering.
4. voltage sampling circuit as claimed in claim 1 is characterized in that: also comprise the A/D modular converter that is connected between this divider resistance and the microprocessing unit.
5. flasher circuit wire detecting device, this motor turning circuit for lamp comprises a sample resistance that is series in the steering indicating light road, this flasher circuit wire detecting device comprises:
Two-way sample circuit unit; Sample circuit unit, every road comprises voltage input end, voltage output end, signal input end, is connected in the transistor amplifier between this voltage input end and the voltage output end; And being connected in the on-off circuit that is used to control transistor amplifier between signal input end and the transistor amplifier, the voltage input end of this two-way sample circuit unit is connected to the two ends of sample resistance respectively;
Divider resistance, the one of which end is connected with the voltage output end of two-way sample circuit unit; And
Microprocessing unit; Comprise that the voltage signal receiving end that is connected to this divider resistance other end, the signal input end that is connected to this two-way sample circuit unit are used for the control signal output ends that this two-way sample circuit unit is controlled in timesharing; And the difference comparison module, this difference comparison module is used for the voltage signal that two-way sample circuit unit time sharing sampling obtains is carried out differential ratio to judge whether fracture of wire of flasher filament.
6. flasher circuit wire detecting device as claimed in claim 5 is characterized in that: this on-off circuit is the switch triode on-off circuit.
7. flasher circuit wire detecting device as claimed in claim 5 is characterized in that: this microprocessing unit also comprises the software filtering module, is used for the voltage signal from this voltage signal receiving end input is carried out filtering.
8. flasher circuit wire detecting device as claimed in claim 5 is characterized in that: also comprise the A/D modular converter that is connected between this divider resistance and the microprocessing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106075338A CN102539878A (en) | 2010-12-27 | 2010-12-27 | Voltage sampling circuit, and filament breakage detecting device of automotive steering lamp employing such voltage sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106075338A CN102539878A (en) | 2010-12-27 | 2010-12-27 | Voltage sampling circuit, and filament breakage detecting device of automotive steering lamp employing such voltage sampling circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102539878A true CN102539878A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106075338A Pending CN102539878A (en) | 2010-12-27 | 2010-12-27 | Voltage sampling circuit, and filament breakage detecting device of automotive steering lamp employing such voltage sampling circuit |
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| Country | Link |
|---|---|
| CN (1) | CN102539878A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527562A (en) * | 2016-01-26 | 2016-04-27 | 江苏才易电子科技有限公司 | Aging transition plate based on rapid charger and aging method |
| CN105527527A (en) * | 2016-01-26 | 2016-04-27 | 江苏才易电子科技有限公司 | Intelligent detector based on rapid charger and testing method |
| CN105548774A (en) * | 2016-01-26 | 2016-05-04 | 江苏才易电子科技有限公司 | Intelligent detection device of quick charger and testing method thereof |
| CN115219770A (en) * | 2022-09-20 | 2022-10-21 | 昆山硕通电子有限公司 | Voltage detection device, voltage sampling circuit and isolation power supply |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086225U (en) * | 1991-03-16 | 1991-10-09 | 骆扬 | Motor vehicle signal lamp breakdown detecting unit |
| CN2574944Y (en) * | 2002-09-28 | 2003-09-24 | 蒋龙潭 | Flying vehicle |
| CN2689233Y (en) * | 2003-12-20 | 2005-03-30 | 凌岩 | Multi-path measuring watt-hour meters |
-
2010
- 2010-12-27 CN CN2010106075338A patent/CN102539878A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086225U (en) * | 1991-03-16 | 1991-10-09 | 骆扬 | Motor vehicle signal lamp breakdown detecting unit |
| CN2574944Y (en) * | 2002-09-28 | 2003-09-24 | 蒋龙潭 | Flying vehicle |
| CN2689233Y (en) * | 2003-12-20 | 2005-03-30 | 凌岩 | Multi-path measuring watt-hour meters |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527562A (en) * | 2016-01-26 | 2016-04-27 | 江苏才易电子科技有限公司 | Aging transition plate based on rapid charger and aging method |
| CN105527527A (en) * | 2016-01-26 | 2016-04-27 | 江苏才易电子科技有限公司 | Intelligent detector based on rapid charger and testing method |
| CN105548774A (en) * | 2016-01-26 | 2016-05-04 | 江苏才易电子科技有限公司 | Intelligent detection device of quick charger and testing method thereof |
| CN115219770A (en) * | 2022-09-20 | 2022-10-21 | 昆山硕通电子有限公司 | Voltage detection device, voltage sampling circuit and isolation power supply |
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Application publication date: 20120704 |