CN2665837Y - Device for regulating DC input signal of vehicle electronic control and industrial process control - Google Patents
Device for regulating DC input signal of vehicle electronic control and industrial process control Download PDFInfo
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- CN2665837Y CN2665837Y CN 200320127839 CN200320127839U CN2665837Y CN 2665837 Y CN2665837 Y CN 2665837Y CN 200320127839 CN200320127839 CN 200320127839 CN 200320127839 U CN200320127839 U CN 200320127839U CN 2665837 Y CN2665837 Y CN 2665837Y
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Abstract
The utility model provides a device for regulating DC input signal of vehicle electronic control and industrial process control and pertains to the technical field of electronic signal transformation. The utility model is characterized in that the utility model is a device formed by serial connection of a resistance voltage dividing branch, a filter capacitor, an instrument amplifier. Two ends of the voltage dividing branch Ru are connected with a short circuit ring N1in parallel. A short circuit ring N2 is connected between the branch Ri and the ground. The short circuit plays the functions of short circuit or opening circuit. The combination of the voltage dividing branch, the instrument amplifier and the short circuit ring, a DC voltage or DC current of single end or differential input greater than, less than or equal to a rated value can be converted into a rated voltage required by an A/D converter.
Description
Technical field
The conditioning device of direct-flow input signal belongs to electronic signal converter technique field in vehicle electric control and the industrial process control.
Background technology
In vehicle electric control and industrial process control, input signal of a great variety is as DC voltage, DC current etc.; The variation range of input signal amplitude is very big.
Have for the DC voltage input signal: 0-5V,＞5V, 0-10V,＞10V ,-5V-+5V,＜-5V,＞5V ,-10V-+10V,＜-10V,＞10V and the millivolt signal that need to amplify.Also have differential voltage input signal, require to be transformed into single ended voltage output, meet the rated voltage of A/D converter requirement input.
Have for the DC current input signal: 0-10mA, 4-20mA, what have requires an end ground connection, and what have does not then have.
In data acquisition system (DAS), the input signal of A/D converter often require for certain specified voltage range such as 0-5V or 0-10V or-5V-+5V or-10V-+10V etc.
All kinds of parameters of technological process are nursed one's health into the rated signal that A/D converter can be accepted, and guaranteeing again has enough conversion accuracies, is crucial.Especially for the data acquisition template of procedure parameter, if there is not signal conditioning circuit, signal converter that must the configuration rates costliness.
The voltage range that existing industrial computer is surveyed, the control template is measured is all in the specified input range of A/D converter, and gain also generally is 1,10,100,1000 or 1,2,4,8,16 several.What ovrrunning signal is not handled means.
Signal regulating device of the present utility model can be imported the signal of rated range, also can handle the signal less than rated range, and gain can be done corresponding adjusting continuously, and this circuit can also be handled the signal greater than rated range.
Summary of the invention
The utility model is to adopt the instrument amplifier of precision resistance, filter capacitor, short-circuited conducting sleeve and precision, high stable, low-power consumption to be built into general signal regulating device, make variety classes, the input signal of different amplitudes, nurse one's health the rated voltage input range that becomes to meet the A/D converter requirement, and do not reduce measuring accuracy.
Of the present utility model being characterised in that:
1. it contains:
Electric resistance partial pressure props up route resistance R u, Ri and is composed in series;
Short-circuited conducting sleeve N1, it is in parallel with resistance R u;
Short-circuited conducting sleeve N2, it is serially connected with between resistance R i and the ground;
Input filter capacitor C1, it is in parallel with resistance R i;
Instrument amplifier input end In+, In-are connected each with filter capacitor C1 through input resistance R, its enlargement factor is K, can regulate by Rg;
Wherein, the electric resistance partial pressure branch road is input as single-ended or differential DC voltage or DC current, the input end of the output termination A/D converter of instrument amplifier.
2. when being input as single-ended or during differential rated voltage, Ru, Ri are infinity, short-circuited conducting sleeve N1 short circuit, N2 opens, instrument amplifier enlargement factor K=1.When input request signal one end ground connection, the N2 short circuit.
3. single-ended or differential during less than rated voltage when being input as, short-circuited conducting sleeve N1 short circuit, N2 opens, instrument amplifier enlargement factor K＞1.When input request signal one end ground connection, the N2 short circuit.
4. single-ended or differential during greater than rated voltage when being input as, select suitable R u, Ri resistance, short-circuited conducting sleeve N1, N2 all open, instrument amplifier enlargement factor K=1, when input request signal one end ground connection, the N2 short circuit.
5. when being input as DC current, short-circuited conducting sleeve N1 short circuit, resistance R u are infinitely great, and N2 opens, and Ri is suitable resistance, instrument amplifier enlargement factor K=1.When having required an end ground connection, the N2 short circuit.
6. described instrument amplifier is the INA28 type.
Input for single-ended or differential nominal voltage signal: no dropping resistor, enlargement factor K=1.
For single-ended or differential input less than nominal voltage signal: no dropping resistor, the N1 short circuit is selected suitable enlargement factor, K＞1.
For single-ended or differential input: adjunction dropping resistor, enlargement factor K=1 greater than nominal voltage signal.
Input for DC current: select suitable dropping resistor for use, the N1 short circuit according to grounding requirement, correctly uses ground short circuit ring N2.
The kind and the amplitude of signal conditioning circuit input signal see Table 1.
The kind and the amplitude of signal conditioning circuit output signal see Table 2.
The kind and the amplitude of table 1 signal conditioning circuit input signal
| Sequence number | Signal kinds | The input signal | Output signal | |
| 1 | Voltage Vi | 0-+5V | | |
| 2 | Voltage Vi | ＞+5V | The precision resistance step-down, | |
| 3 | Voltage Vi | 0-+10V | | |
| 4 | Voltage Vi | ＞+10V | The precision resistance step-down, nominal voltage signal | |
| 5 | Voltage Vi | -5V-+5V | | |
| 6 | Voltage Vi | ＜-5V、＞+5V | The precision resistance step-down, | |
| 7 | Voltage Vi | -10V-+10V | | |
| 8 | Voltage Vi | ＜-10V、＞+10V | The precision resistance step-down, nominal voltage signal | |
| 9 | Voltage Vi | Less than the range of nominal tension, need instrument amplifier to amplify for guaranteeing precision | Enlargement factor 1-1000 is adjustable, nominal voltage signal | |
| 10 | Voltage Vi | Differential input, single-ended output | Use differential amplification, nominal voltage signal | |
| 11 | Electric current I i | 0-10mA | Import no earth terminal, nominal voltage signal | |
| 12 | Electric current I i | 0-10mA | Input has earth terminal, nominal voltage signal |
| 13 | Electric current I i | ?4-20mA | Import no earth terminal, nominal voltage signal |
| 14 | Electric current I i | ?4-20mA | Input has earth terminal, nominal voltage signal |
The kind and the amplitude of table 2 signal conditioning circuit output signal
| Sequence number | Signal kinds | The output | Remarks | |
| 1 | Voltage Vo | 0-+5V | The rated range that A/D converter requires | |
| 2 | Voltage Vo | 0-+10V | The rated range that A/D converter requires | |
| 3 | Voltage Vo | -5V-+5V | The rated range that A/D converter requires | |
| 4 | Voltage Vo | -10V-+10V | The rated range that A/D converter requires |
Use proof: it can become the required specified input voltage of A/D converter to the voltage of all kinds, different amplitudes or current regulating.
Description of drawings
Fig. 1. circuit block diagram of the present utility model.
Fig. 2. circuit theory diagrams of the present utility model.
Input is all kinds: the direct-flow input signal of single-ended or differential DC voltage or DC current, different amplitudes.
N1, N2 are short-circuited conducting sleeves.
Ru, Ri are dividing potential drop or dropping resistor.Require enough precision, stability than higher.
C1 is a filter element.
R is an input element.
Rg is that potentiometer, gain-adjusted scope 1-1000 are adjusted in gain.
Operational amplifier is selected instrument amplifier INA28 for use.
Output is the output of instrument amplifier, corresponding to the specified input signal of A/D converter.
Fig. 3. when being input as single-ended or during differential rated voltage, circuit theory diagrams of the present utility model.
Fig. 4. single-ended or differential during when being input as less than rated voltage, circuit theory diagrams of the present utility model.
Fig. 5. single-ended or differential during when being input as greater than rated voltage, circuit theory diagrams of the present utility model.
Fig. 6. when being input as DC current, circuit theory diagrams of the present utility model.
Embodiment
Input signal: the voltage of all kinds, different amplitudes or electric current.
Signal conditioning circuit: precision resistance+filter capacitor+instrument amplifier+short-circuited conducting sleeve.
A/D converter: connect the output of signal conditioning circuit, require specified input voltage value.
The signal conditioning circuit template can be designed to the input of eight road or 10 six tunnel analog quantitys.Eight or 16 signal conditioning circuits all are designed to identical structure, and through precision resistance, filter capacitor assembly, the adjustment of instrument amplifier enlargement factor can adapt to the direct-flow input signal of all kinds, different amplitudes.
1. single-ended or differential rated voltage input (as 0V-10V):
Need not divider resistance, instrument amplifier enlargement factor K=1.
When needing an end ground connection, the N2 short circuit.
2. single-ended or differential input (as 0V-100mV) less than rated voltage:
Need not divider resistance, instrument amplifier enlargement factor K＞1 (as 100).
When needing an end ground connection, the N2 short circuit.
3. single-ended or differential greater than rated voltage (as 0V-20V):
Need divider resistance Ru, Ri, instrument amplifier enlargement factor K=1.
When needing an end ground connection, the N2 short circuit.
4. when input dc power flows:
Need to use dropping resistor Ri, instrument amplifier enlargement factor K=1.
When needing an end ground connection, the N2 short circuit.
This shows:
Input for nominal voltage signal: need not dropping resistor Ru, Ri, instrument amplifier enlargement factor K=1.
For input: need not dropping resistor Ru, Ri, select suitable instrument amplifier enlargement factor K (＞1) less than nominal voltage signal.
For input: adjunction dropping resistor Ru, Ri, instrument amplifier enlargement factor K=1 greater than nominal voltage signal.
Input for DC current: select suitable dropping resistor Ri for use,, correctly use short-circuited conducting sleeve N2 according to grounding requirement.
Claims (6)
1. the conditioning device of direct-flow input signal in the control of vehicle electric control and industrial process is characterized in that it contains:
Electric resistance partial pressure props up route resistance R u, Ri and is composed in series;
Short-circuited conducting sleeve N1, it is in parallel with resistance R u;
Short-circuited conducting sleeve N2, it is serially connected with between resistance R i and the ground;
Input filter capacitor C1, it is in parallel with resistance R i;
Instrument amplifier input end In+, In-are connected each with filter capacitor C1 through input resistance R, its enlargement factor is K, can regulate by Rg;
Wherein, the electric resistance partial pressure branch road is input as single-ended or differential DC voltage, or DC current, the input end of the output termination A/D converter of instrument amplifier.
2. the conditioning device of direct-flow input signal in vehicle electric control according to claim 1 and the industrial process control, it is characterized in that: when being input as single-ended or during differential rated voltage, Ru, Ri are infinity, short-circuited conducting sleeve N1 short circuit, N2 opens, instrument amplifier enlargement factor K=1.When input request signal one end ground connection, the N2 short circuit.
3. the conditioning device of direct-flow input signal in vehicle electric control according to claim 1 and the industrial process control, it is characterized in that: single-ended or differential during less than rated voltage when being input as, short-circuited conducting sleeve N1 short circuit, N2 opens, instrument amplifier enlargement factor K＞1.When input request signal one end ground connection, the N2 short circuit.
4. the conditioning device of direct-flow input signal in vehicle electric control according to claim 1 and the industrial process control, it is characterized in that: single-ended or differential during greater than rated voltage when being input as, selecting Ru, Ri is suitable resistance, and short-circuited conducting sleeve N1 opens, instrument amplifier enlargement factor K=1.When input request signal one end ground connection, the N2 short circuit.
5. the conditioning device of direct-flow input signal in vehicle electric control according to claim 1 and the industrial process control is characterized in that: when being input as DC current, and short-circuited conducting sleeve N1 short circuit, resistance R u is infinitely great, N2 opens, and Ri is suitable resistance, instrument amplifier enlargement factor K=1.When having required an end ground connection, the N2 short circuit.
6. the conditioning device of direct-flow input signal in vehicle electric control according to claim 1 and the industrial process control, it is characterized in that: described instrument amplifier is the INA28 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320127839 CN2665837Y (en) | 2003-12-19 | 2003-12-19 | Device for regulating DC input signal of vehicle electronic control and industrial process control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320127839 CN2665837Y (en) | 2003-12-19 | 2003-12-19 | Device for regulating DC input signal of vehicle electronic control and industrial process control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2665837Y true CN2665837Y (en) | 2004-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320127839 Expired - Fee Related CN2665837Y (en) | 2003-12-19 | 2003-12-19 | Device for regulating DC input signal of vehicle electronic control and industrial process control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2665837Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253891A (en) * | 2016-09-26 | 2016-12-21 | 航天长峰朝阳电源有限公司 | A kind of high precision 4～20mA is converted into ± the current/voltage modular converter of 10V |
-
2003
- 2003-12-19 CN CN 200320127839 patent/CN2665837Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253891A (en) * | 2016-09-26 | 2016-12-21 | 航天长峰朝阳电源有限公司 | A kind of high precision 4～20mA is converted into ± the current/voltage modular converter of 10V |
| CN106253891B (en) * | 2016-09-26 | 2023-04-07 | 航天长峰朝阳电源有限公司 | High-precision current-voltage conversion module for converting 4-20 mA into +/-10V |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |