CN206804043U - Recording instrument without paper with multi-channel sampling - Google Patents
Recording instrument without paper with multi-channel sampling Download PDFInfo
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- CN206804043U CN206804043U CN201720656770.0U CN201720656770U CN206804043U CN 206804043 U CN206804043 U CN 206804043U CN 201720656770 U CN201720656770 U CN 201720656770U CN 206804043 U CN206804043 U CN 206804043U
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- electric capacity
- operational amplifier
- oxide
- semiconductor
- voltage
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Abstract
The utility model discloses a kind of recording instrument without paper with multi-channel sampling, including microprocessor, three multi-channel analog signal switches, first operational amplifier, A/D converter, eight channel number words control simulant electronic switch and overvoltage crowbar, microprocessor controls each multi-channel analog signal switch to be acquired the various signals at scene, and the signal after collection is sent to the first operational amplifier, microprocessor also controls the gain of eight channel number words control simulant electronic switch the first operational amplifier of regulation, first operational amplifier is sent to A/D converter progress analog-to-digital conversion after signal condition is carried out to the signal after collection；Overvoltage crowbar includes power supply, the second operational amplifier, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first voltage-stabiliser tube, the second voltage-stabiliser tube, potentiometer, the first electric capacity to the 4th electric capacity and first resistor.The utility model versatility is higher, circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher.
Description
Technical field
Recording instrument without paper field is the utility model is related to, more particularly to a kind of recording instrument without paper with multi-channel sampling.
Background technology
With the continuous intensification of automaticity in process industry, the demand of monitoring and control of the user to procedure parameter is not
It is disconnected to increase.Data record unit of the recording instrument without paper as whole process, is widely used in electric power, metallurgy, petrochemical industry, light textile, food
The industries such as product, medicine, and the signal sample circuit in recording instrument without paper directly influences the performance of recorder.Traditional signal is adopted
Sample circuit often specially designs for the sensor of independent species, and versatility is not high, and can only realize the sampling of single channel
Function.In addition, the circuit structure of traditional signal sample circuit is complex, cost is higher.And due to lacking corresponding circuit
Defencive function, cause the safety and reliability of circuit relatively low.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided a kind of versatility
It is higher, circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher have multi-channel sampling without paper
Recorder.
Technical scheme is used by the utility model solves its technical problem：Construct a kind of nothing with multi-channel sampling
Paper recorder, including microprocessor, three multi-channel analog signal switches, the first operational amplifier, A/D converter, eight passages
Digital control simulant electronic switch and overvoltage crowbar, each multi-channel analog signal switch of microprocessor control
The various signals at scene are acquired, and the signal after collection is sent to first operational amplifier, the microprocessor
Device also controls the eight channel number words control simulant electronic switch to adjust the gain of first operational amplifier, and described first transports
Calculate after amplifier carries out signal condition to the signal after the collection of reception and be sent to the A/D converter progress analog-to-digital conversion, institute
Overvoltage crowbar is stated to be connected with first operational amplifier, for the supply voltage progress to first operational amplifier
Overvoltage protection；
The overvoltage crowbar includes power supply, the second operational amplifier, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first voltage stabilizing
Pipe, the second voltage-stabiliser tube, potentiometer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and first resistor, the power supply
Positive pole is connected with the source electrode and grid of first metal-oxide-semiconductor respectively, the drain electrode of first metal-oxide-semiconductor respectively with first voltage stabilizing
One end of the negative electrode of pipe and the 3rd electric capacity connects, the anode of first voltage-stabiliser tube one end with first electric capacity, electricity respectively
One fixing end of position device connect with sliding end, and another fixing end of the potentiometer is grounded, the 3rd electric capacity it is another
End is connected with a pin of second operational amplifier and the other end of the first electric capacity respectively, second operational amplifier
Input in the same direction be connected with the first resistor, the negative pole of the power supply is connect respectively with the source of second metal-oxide-semiconductor and grid
Connection, the drain electrode of second metal-oxide-semiconductor is connected with one end of the 4th electric capacity and the negative electrode of the second voltage-stabiliser tube respectively, and described the
The plus earth of two voltage-stabiliser tubes, the other end of the 4th electric capacity respectively with another pin of second operational amplifier and
One end connection of second electric capacity, the other end ground connection of second electric capacity.
Described in the utility model with the recording instrument without paper of multi-channel sampling, the capacitance of the 3rd electric capacity is
30PF, the capacitance of the 4th electric capacity is 70PF, and the resistance of the first resistor is 4.7K Ω.
Described in the utility model with the recording instrument without paper of multi-channel sampling, the overvoltage crowbar also includes
Second resistance, the second resistance are connected with the inverting input of second operational amplifier, the resistance of the second resistance
For 4.7K Ω.
Described in the utility model with the recording instrument without paper of multi-channel sampling, the overvoltage crowbar also includes
3rd resistor, one end of the 3rd resistor are connected with one end of first electric capacity, the other end of the 3rd resistor and institute
State the fixing end connection of potentiometer.
Described in the utility model with the recording instrument without paper of multi-channel sampling, first metal-oxide-semiconductor and the 2nd MOS
Pipe is N-channel MOS pipe.
Implement the recording instrument without paper of the present utility model with multi-channel sampling, have the advantages that：Due to provided with
Microprocessor, three multi-channel analog signal switches, the first operational amplifier, A/D converter, eight channel number words control simulation electricity
Sub switch and overvoltage crowbar, simulant electronic switch is controlled by eight relatively low channel number words of price, can be easily to difference
Type sample objects carry out signal condition, reduce the use of the operational amplifier higher to price, the first op-amp gain
It is controllable increase sampling range change degree, add circuit versatility, overvoltage crowbar includes power supply, the second operation amplifier
Device, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first voltage-stabiliser tube, the second voltage-stabiliser tube, potentiometer, the first electric capacity, the second electric capacity, the 3rd electricity
Appearance, the 4th electric capacity and first resistor, the component that it is used is less, can save hardware cost, the 3rd electric capacity and the 4th electric capacity
For preventing from disturbing, first resistor be used for carry out overcurrent protection, therefore versatility is higher, circuit structure is relatively simple, cost compared with
Low, circuit safety and reliability is higher.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 has the structural representation in recording instrument without paper one embodiment of multi-channel sampling for the utility model；
Fig. 2 is the circuit theory diagrams of overvoltage crowbar in the embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
, should be with multi-channel sampling without paper in the utility model has the recording instrument without paper embodiment of multi-channel sampling
The structural representation of recorder is as shown in Figure 1.In Fig. 1, should with multi-channel sampling recording instrument without paper include microprocessor 1,
Three multi-channel analog signals switch the 2, first operational amplifier 3, A/D converter 4, eight channel number words control simulant electronic switch
5 and overvoltage crowbar 6, wherein, microprocessor 1 controls each multi-channel analog signal to switch 2 pairs of live various signals to enter
Row collection, and the signal after collection is sent to the first operational amplifier 3, microprocessor 1 also controls eight channel number words to control mould
Intend the gain that electronic switch 2 adjusts the first operational amplifier 3, the first operational amplifier 3 is carried out to the signal after the collection of reception
A/D converter 4 is sent to after signal condition and carries out analog-to-digital conversion, overvoltage crowbar 6 is connected with the first operational amplifier 3, used
Overvoltage protection is carried out in the supply voltage to the first operational amplifier 3.
Control multi-channel analog signal 2 switch sampling types of switch and passage, simultaneous selection suitable by microprocessor 1
Gain amplifier is matched, and finally obtaining current voltage by A/D converter 4 corresponds to code value.By the relatively low analog switch of price,
Signal condition easily can be carried out to different type sample objects, reduce the use of the operational amplifier higher to price.Meanwhile
The gain of first operational amplifier 3 it is controllable, make sampling range change degree increase, increase circuit versatility, can conveniently be transplanted to
In the instrument of different platform, the full input signal sampling of at most achievable triple channel.Heat endurance is higher simultaneously, can be in 0-50
Normal work under DEG C environment.
Fig. 2 is the circuit theory diagrams of overvoltage crowbar in the present embodiment, and in Fig. 2, the overvoltage crowbar 6 includes power supply
E, the second operational amplifier U, the first metal-oxide-semiconductor T1, the second metal-oxide-semiconductor T2, the first voltage-stabiliser tube ZD1, the second voltage-stabiliser tube ZD2, potentiometer
RP, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 and first resistor R1, wherein, power supply E positive pole point
Be not connected with the first metal-oxide-semiconductor T1 source electrode and grid, the first metal-oxide-semiconductor T1 drain electrode respectively with the first voltage-stabiliser tube ZD1 negative electrode and
3rd electric capacity C3 one end connection, the first voltage-stabiliser tube ZD1 anode respectively one end with the first electric capacity C1, one of potentiometer RP
Fixing end is connected with sliding end, and potentiometer RP another fixing end ground connection, the 3rd electric capacity C3 other end is transported with second respectively
Calculate the other end connection of amplifier U a pin and the first electric capacity C1, the second operational amplifier U input in the same direction and first
Resistance R1 connections, power supply E negative pole connects with the second metal-oxide-semiconductor T2 source respectively to be connected with grid, the second metal-oxide-semiconductor T2 drain electrode difference
It is connected with the 4th electric capacity C4 one end and the second voltage-stabiliser tube ZD2 negative electrode, the second voltage-stabiliser tube ZD2 plus earth, the 4th electric capacity
The C4 other end is connected with the second operational amplifier U another pin and the second electric capacity C2 one end respectively, the second electric capacity C2
The other end ground connection.3rd electric capacity C3 capacitance is 30PF, and the 4th electric capacity C4 capacitance is 70PF, first resistor R1 resistance
It is worth for 4.7K Ω.
For the overvoltage crowbar 6 compared with traditional voltage protection circuit, the component that it is used is less, circuit structure compared with
To be simple, hardware cost can be so saved.In addition, the 3rd electric capacity C3 and the 4th electric capacity C4 are coupled capacitor, the 3rd electric capacity C3
For preventing the interference between the first triode T1 and the second operational amplifier U, the 4th electric capacity C4 is used to prevent the 4th electric capacity C4
With the interference between the second operational amplifier U.First resistor R1 is current-limiting resistance, for the same phase to the second operational amplifier U
Branch road where input carries out overcurrent protection, therefore the safety and reliability of circuit is higher.
After 6 use of overvoltage crowbar, when power supply E voltage power supply is normal, the first voltage-stabiliser tube ZD1 and the second voltage stabilizing
Pipe ZD2 does not work, and Low ESR is presented in the first metal-oxide-semiconductor T1 and the second metal-oxide-semiconductor T2, does not influence the second operational amplifier U normal works,
When power supply E voltage increases suddenly, the first voltage-stabiliser tube ZD1 and the second voltage-stabiliser tube ZD2 work, make the second operational amplifier U's
Voltage stabilizing value of the operating voltage not over the first voltage-stabiliser tube ZD1 and the second voltage-stabiliser tube ZD2, the first metal-oxide-semiconductor T1 and the second metal-oxide-semiconductor T2
High impedance is presented, so as to limit the electric current flowed through on the first voltage-stabiliser tube ZD1 and the second voltage-stabiliser tube ZD2, makes it also be unlikely to burn
It is bad, when the second operational amplifier U actual power voltage is higher or power supply E produces mutation, protect it from damaging.
It is noted that in the present embodiment, the first metal-oxide-semiconductor T1 and the second metal-oxide-semiconductor T2 are N-channel MOS pipe.Certainly,
Under the certain situation of the present embodiment, the first metal-oxide-semiconductor T1 and the second metal-oxide-semiconductor T2 can also be P-channel metal-oxide-semiconductor, but at this moment
Circuit structure also will accordingly change.
In the present embodiment, the overvoltage crowbar 6 also includes second resistance R2, second resistance R2 and the second operational amplifier
U inverting input connection, second resistance R2 resistance is 4.7K Ω.Second resistance R2 is current-limiting resistance, for being transported to second
Branch road where calculating amplifier U inverting input carries out overcurrent protection, so can further improve circuit security and
Reliability.
In the present embodiment, the overvoltage crowbar 6 also includes 3rd resistor R3,3rd resistor R3 one end and the first electric capacity
C1 one end connection, the 3rd resistor R3 other end are connected with a potentiometer RP fixing end.3rd resistor R3 is current limliting electricity
Resistance, for carrying out overcurrent protection to the branch road between the first electric capacity C1 and potentiometer RP, it so can further improve circuit
Safety and reliability.
In a word, the utility model controls simulant electronic switch by eight relatively low channel number words of price, can be easily to not
Same type sample objects carry out signal condition, reduce the use of the operational amplifier higher to price, and the first operational amplifier increases
The controllable versatility for increasing sampling range change degree, adding circuit of benefit.Further, since the overvoltage crowbar 6 uses
Component it is less, circuit structure is relatively simple, can so save hardware cost.Simultaneously because in the overvoltage crowbar 6
Provided with coupled capacitor and current-limiting resistance, therefore the safety and reliability of circuit is higher.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in
Protection domain within.
Claims (5)
1. a kind of recording instrument without paper with multi-channel sampling, it is characterised in that including microprocessor, three multichannel analog letters
Number switch, the first operational amplifier, A/D converter, eight channel number words control simulant electronic switch and overvoltage crowbar, it is described
The each multi-channel analog signal switch of microprocessor control is acquired to the various signals at scene, and by the letter after collection
First operational amplifier number is sent to, the microprocessor also controls the eight channel number words control simulant electronic switch to adjust
The gain of first operational amplifier is saved, first operational amplifier carries out signal condition to the signal after the collection of reception
After be sent to the A/D converter and carry out analog-to-digital conversion, the overvoltage crowbar is connected with first operational amplifier, used
Overvoltage protection is carried out in the supply voltage to first operational amplifier；
The overvoltage crowbar includes power supply, the second operational amplifier, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first voltage-stabiliser tube, the
Two voltage-stabiliser tubes, potentiometer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity and first resistor, the positive pole of the power supply
Be connected respectively with the source electrode and grid of first metal-oxide-semiconductor, first metal-oxide-semiconductor drain electrode respectively with first voltage-stabiliser tube
One end of negative electrode and the 3rd electric capacity connects, the anode of first voltage-stabiliser tube one end with first electric capacity, potentiometer respectively
A fixing end connected with sliding end, another fixing end of potentiometer ground connection, the other end point of the 3rd electric capacity
Be not connected with a pin of second operational amplifier and the other end of the first electric capacity, second operational amplifier it is same
It is connected to input with the first resistor, the negative pole of the power supply connects with the source of second metal-oxide-semiconductor respectively to be connected with grid,
The drain electrode of second metal-oxide-semiconductor is connected with one end of the 4th electric capacity and the negative electrode of the second voltage-stabiliser tube respectively, and described second is steady
The plus earth of pressure pipe, the other end of the 4th electric capacity another pin and second with second operational amplifier respectively
One end connection of electric capacity, the other end ground connection of second electric capacity.
2. the recording instrument without paper according to claim 1 with multi-channel sampling, it is characterised in that the 3rd electric capacity
Capacitance is 30PF, and the capacitance of the 4th electric capacity is 70PF, and the resistance of the first resistor is 4.7K Ω.
3. the recording instrument without paper according to claim 1 or 2 with multi-channel sampling, it is characterised in that the overvoltage is protected
Protection circuit also includes second resistance, and the second resistance is connected with the inverting input of second operational amplifier, and described
The resistance of two resistance is 4.7K Ω.
4. the recording instrument without paper according to claim 3 with multi-channel sampling, it is characterised in that the overvoltage protection electricity
Road also includes 3rd resistor, and one end of the 3rd resistor is connected with one end of first electric capacity, the 3rd resistor it is another
One end is connected with a fixing end of the potentiometer.
5. the recording instrument without paper according to claim 1 or 2 with multi-channel sampling, it is characterised in that the first MOS
Pipe and the second metal-oxide-semiconductor are N-channel MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720656770.0U CN206804043U (en) | 2017-06-07 | 2017-06-07 | Recording instrument without paper with multi-channel sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720656770.0U CN206804043U (en) | 2017-06-07 | 2017-06-07 | Recording instrument without paper with multi-channel sampling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206804043U true CN206804043U (en) | 2017-12-26 |
Family
ID=60744988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720656770.0U Expired - Fee Related CN206804043U (en) | 2017-06-07 | 2017-06-07 | Recording instrument without paper with multi-channel sampling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206804043U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116708997A (en) * | 2023-08-09 | 2023-09-05 | 深圳市锐斯特科技有限公司 | Remote shutter control device of automobile data recorder |
-
2017
- 2017-06-07 CN CN201720656770.0U patent/CN206804043U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116708997A (en) * | 2023-08-09 | 2023-09-05 | 深圳市锐斯特科技有限公司 | Remote shutter control device of automobile data recorder |
| CN116708997B (en) * | 2023-08-09 | 2023-10-27 | 深圳市锐斯特科技有限公司 | Remote shutter control device of automobile data recorder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |