CN203883778U - Amplification module for detected signals in substation gas concentration detection system - Google Patents
Amplification module for detected signals in substation gas concentration detection system Download PDFInfo
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- CN203883778U CN203883778U CN201420327877.7U CN201420327877U CN203883778U CN 203883778 U CN203883778 U CN 203883778U CN 201420327877 U CN201420327877 U CN 201420327877U CN 203883778 U CN203883778 U CN 203883778U
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- 230000003321 amplification Effects 0.000 title claims abstract description 36
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 239000011324 bead Substances 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 description 27
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an amplification module for detected signals in a substation gas concentration detection system. The amplification module comprises a primary amplification circuit, a secondary amplification circuit and an amplifying signal output line, wherein the primary amplification circuit comprises a first amplifier; and the secondary amplification circuit comprises a second amplifier, a second adjustable resistor, a third resistor, a fourth resistor and a seventh resistor. Two ends of the seventh resistor are respectively connected with the output end of the first amplifier and the non-inverting input end of the second amplifier, the two ends of the second adjustable resistor are respectively connected with the inverting input end and the output end of the second amplifier, one end of the third resistor is connected with a line between the inverting input end of the second amplifier and the second adjustable resistor, the other end of the third resistor is in ground connection, and the two ends of the fourth resistor are respectively connected with the output end of the second amplifier and the amplifying signal output line. When the amplification module is in application, through two-stage amplification, the problem that signals are weak due to attenuation and cannot be visually displayed can be solved, and detection accuracy of the substation gas concentration detection system can be guaranteed.
Description
Technical field
the utility model relates to substation safety protection field, the specifically amplification module of detectable signal in transformer station's gas concentration detection system.
Background technology
transformer station is for a long time in closed state, and in it, air, in first valve state, easily deposits the high gas of a large amount of molecular weight in transformer station, therefore, carries out regularly detecting particularly important to gas concentration in transformer station.In order to detect gas concentration in transformer station, design now a kind of transformer station gas concentration detection system, it comprises transducer, D.C. regulated power supply, analog to digital conversion circuit and digital display circuit, when this detection system application, be whole system power supply by D.C. regulated power supply, transducer converts the gas concentration signal detecting to voltage signal, and shows gas concentration value by digital display circuit after analog to digital conversion circuit conversion.Wherein, the weak output signal that when this system applies, transducer detects, in transmitting procedure, can there is attenuation and absorption in signal, and digital display circuit can accurately not reflect gas concentration in transformer station, so, can cause misleading and have potential safety hazard operating personnel.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and providing a kind of can amplify sensor detection signal, to intuitively show the amplification module of detectable signal in transformer station's gas concentration detection system of gas concentration in transformer station.
The utility model addresses the above problem and is achieved through the following technical solutions: the amplification module of detectable signal in transformer station's gas concentration detection system, comprise elementary amplifying circuit, secondary amplification circuit and amplifying signal outlet line, described elementary amplifying circuit comprises the first amplifier, described secondary amplification circuit comprises the second amplifier, the second adjustable resistance, the 3rd resistance, the 4th resistance and the 7th electric capacity, described the 7th electric capacity two ends are connected with the first amplifier out and the second amplifier in-phase input end respectively, the second adjustable resistance two ends are connected with the second amplifier inverting input and output respectively, the 3rd resistance one end is connected on the circuit between the second amplifier inverting input and the second adjustable resistance, its other end ground connection, described the 4th resistance two ends are connected with the second amplifier out and amplifying signal outlet line respectively.When the utility model application, the signal that transducer detects is inputted by in-phase input end and the inverting input of the first amplifier, after the first amplifier carries out elementary amplification, then is exported by amplifying signal outlet line after secondary amplification circuit is amplified again.
Because AD620 is that it has the feature of low skew, high-gain, high conjugated analoging systeming ratio by three difference instrumentation amplifiers that accurate amplifier is integrated, further, described the first amplifier adopts AD620 chip.
Further, described elementary amplifying circuit also comprises the first adjustable resistance, and the two ends of the first adjustable resistance are connected with the first pin and the 8th pin of the first amplifier respectively.
In order to prevent that power end noise coupling from entering in the first amplifier, further, described elementary amplifying circuit also comprises the first magnetic bead, the second magnetic bead, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity and the 6th electric capacity, described the first magnetic bead two ends connect respectively the 7th pin of positive source and the first amplifier, parallel branch one end that described the 3rd electric capacity and the 4th Capacitance parallel connection form is connected on the circuit between the first magnetic bead and the first amplifier, its other end ground connection; Described the second magnetic bead two ends connect respectively the 4th pin of power cathode and the first amplifier, and parallel branch one end that described the 5th electric capacity and the 6th Capacitance parallel connection form is connected on the circuit between the second magnetic bead and the first amplifier, its other end ground connection.So, when the utility model, the each energization pins of the first amplifier is connected to two electric capacity with ground, and carries out power decoupling by a magnetic bead series connection.
Further, the amplification module of detectable signal in transformer station's gas concentration detection system, also comprises the 5th resistance, and described the 5th resistance one end is connected on amplifying signal outlet line, its other end external power supply.
Because OP777 chip is a ultraprecise low noise amplifier, there is extremely low voltage and current skew and very high gain stability, further, described the second amplifier adopts OP777 chip.
Further, described elementary amplifying circuit also comprises the first electric capacity, the second electric capacity, the first resistance and the second resistance, described first electric capacity one end is connected with the inverting input of the first amplifier, second electric capacity one end is connected with the in-phase input end of the first amplifier, the first resistance and the second resistance homogeneous end ground connection, the the first resistance relatively other end of its earth terminal is connected on the circuit between the first electric capacity and the first amplifier inverting input, the the second resistance relatively other end of its earth terminal is connected on the circuit between the second electric capacity and the first amplifier in-phase input end.So, when the utility model application, carry out AC coupled input by the first electric capacity and the second electric capacity, the first electric capacity and the first resistance composition high pass filter, the second electric capacity and the second resistance composition high pass filter, the high pass filter that the utility model consists of the first electric capacity, the second electric capacity, the first resistance and the second resistance is to reduce the low-frequency disturbance in environment.
In sum, the utlity model has following beneficial effect: the utility model comprises elementary amplifying circuit, secondary amplification circuit and amplifying signal outlet line, wherein, elementary amplifying circuit comprises the first amplifier, secondary amplification circuit comprises the second amplifier, the second adjustable resistance, the 3rd resistance, the 4th resistance and the 7th electric capacity, the 7th electric capacity two ends are connected with the first amplifier out and the second amplifier in-phase input end respectively, the second adjustable resistance two ends are connected with the second amplifier inverting input and output respectively, the 3rd resistance one end is connected on the circuit between the second amplifier inverting input and the second adjustable resistance, its other end ground connection, the 4th resistance two ends are connected with the second amplifier out and amplifying signal outlet line respectively, the utility model adopts said structure, overall structure is simple, be convenient to realize, when the utility model application, sensor detection signal is inputted and is amplified by the first amplifier, inputting secondary amplification circuit amplifies again again, sensor detection signal can ensure that digital display circuit reflects gas concentration in transformer station accurately after two-stage is amplified, so, can eliminate and detect not accurate existing potential safety hazard.
Brief description of the drawings
The structural representation of a specific embodiment of Fig. 1 the utility model.
In accompanying drawing, the corresponding name of Reference numeral is called: R1, the first resistance, R2, the second resistance, R3, the 3rd resistance, R4, the 4th resistance, R5, the 5th resistance, RW1, the first adjustable resistance, RW2, the second adjustable resistance, C1, the first electric capacity, C2, the second electric capacity, C3, the 3rd electric capacity, C4, the 4th electric capacity, C5, the 5th electric capacity, C6, the 6th electric capacity, C7, the 7th electric capacity, A1, the first amplifier, A2, the second amplifier, L1, the first magnetic bead, L2, the second magnetic bead.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but execution mode of the present utility model is not limited to this.
Embodiment:
As shown in Figure 1, the amplification module of detectable signal in transformer station's gas concentration detection system, comprises elementary amplifying circuit, bandwidth-limited circuit, secondary amplification circuit and amplifying signal outlet line, wherein, elementary amplifying circuit comprises the first amplifier A1, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, the first resistance R 1, the second resistance R 2, the first magnetic bead L1, the second magnetic bead L2 and the first adjustable resistance RW1, the first amplifier A1 of the present embodiment adopts AD620 chip, the two ends of the first adjustable resistance RW1 are connected with the first pin and the 8th pin of the first amplifier A1 respectively, first capacitor C 1 one end is connected with the inverting input of the first amplifier A1, second capacitor C 2 one end are connected with the in-phase input end of the first amplifier A1, the first resistance R 1 and second resistance R 2 both homogeneous end ground connection, the other end of first resistance R 1 relative its earth terminal is connected on the circuit between the first capacitor C 1 and the first amplifier A1 inverting input, and the other end of second resistance R 2 relative its earth terminals is connected on the circuit between the second capacitor C 2 and the first amplifier A1 in-phase input end.The first magnetic bead L1 two ends connect respectively the 7th pin of positive source and the first amplifier A1, and the 3rd capacitor C 3 and the 4th capacitor C 4 parallel branch one end forming in parallel are connected on the circuit between the first magnetic bead L1 and the first amplifier A1, its other end ground connection.The second magnetic bead L2 two ends connect respectively the 4th pin of power cathode and the first amplifier A1, and the 5th capacitor C 5 and the 6th capacitor C 6 parallel branch one end forming in parallel are connected on the circuit between the second magnetic bead L2 and the first amplifier A1, its other end ground connection.
The secondary amplification circuit of the present embodiment comprises the second amplifier A2, the second adjustable resistance RW2, the 3rd resistance R 3, the 4th resistance R 4 and the 7th capacitor C 7, wherein, the second amplifier A2 also adopts OP777 chip, the second amplifier A2 energization pins external power supply both positive and negative polarity, the 7th capacitor C 7 two ends are connected with the first amplifier A1 output and the second amplifier A2 in-phase input end respectively, the second adjustable resistance RW2 two ends are connected with the second amplifier A2 inverting input and output respectively, the 3rd resistance R 3 one end are connected on the circuit between the second amplifier A2 inverting input and the second adjustable resistance RW2, its other end ground connection, the 4th resistance R 4 two ends are connected with the second amplifier A2 output and amplifying signal outlet line respectively.The present embodiment also comprises that the 5th resistance R 5, the five resistance R 5 one end are connected on amplifying signal outlet line, its other end external power supply.The present embodiment is in the time of concrete application, and the first amplifier A1 and the second amplifier A2 all adopt 5V Power supply.
In the present embodiment, the resistance of the first resistance R 1 and the second resistance R 2 is 24.7K Ω, the resistance of the 3rd resistance R 3 is 10 K Ω, the resistance of the 4th resistance R 4 and the 5th resistance R 5 is 20 K Ω, the resistance adjustable extent of the first adjustable resistance RW1 is 0～50 K Ω, the resistance adjustable extent of the second adjustable resistance RW2 is 0～200 K Ω, first capacitor C 1 of the present embodiment, the second capacitor C 2, the 3rd capacitor C 3, the capacitance of the 6th capacitor C 6 and the 7th capacitor C 7 is 0.1 μ F, both have all adopted polarity tantalum electric capacity the 4th capacitor C 4 and the 5th capacitor C 5, both capacitances are 10 μ F.
When the present embodiment application, the signal that transducer detects is inputted with the other end that the second capacitor C 2 is connected the first amplifier A1 end relatively by the first capacitor C 1, the high-pass filtering circuit filtering low-frequency disturbance being formed by the first capacitor C 1, the second capacitor C 2, the first resistance R 1 and the second resistance R 2, by the resistance that regulates the first adjustable resistance RW1, the gain of elementary amplification is regulated, and by the resistance that regulates the second adjustable resistance RW2, the gain of secondary amplification is regulated, the signal carrying out after secondary amplification is exported by amplifying signal incoming line.
As mentioned above, can realize preferably the utility model.
Claims (7)
1. the amplification module of detectable signal in transformer station's gas concentration detection system, it is characterized in that, comprise elementary amplifying circuit, secondary amplification circuit and amplifying signal outlet line, described elementary amplifying circuit comprises the first amplifier (A1), described secondary amplification circuit comprises the second amplifier (A2), the second adjustable resistance (RW2), the 3rd resistance (R3), the 4th resistance (R4) and the 7th electric capacity (C7), described the 7th electric capacity (C7) two ends are connected with the first amplifier (A1) output and the second amplifier (A2) in-phase input end respectively, the second adjustable resistance (RW2) two ends are connected with the second amplifier (A2) inverting input and output respectively, the 3rd resistance (R3) one end is connected on the circuit between the second amplifier (A2) inverting input and the second adjustable resistance (RW2), its other end ground connection, described the 4th resistance (R4) two ends are connected with the second amplifier (A2) output and amplifying signal outlet line respectively.
2. the amplification module of detectable signal in transformer station according to claim 1 gas concentration detection system, is characterized in that, described the first amplifier (A1) adopts AD620 chip.
3. the amplification module of detectable signal in transformer station according to claim 2 gas concentration detection system, it is characterized in that, described elementary amplifying circuit also comprises the first adjustable resistance (RW1), and the two ends of the first adjustable resistance (RW1) are connected with the first pin and the 8th pin of the first amplifier (A1) respectively.
4. the amplification module of detectable signal in transformer station according to claim 2 gas concentration detection system, it is characterized in that, described elementary amplifying circuit also comprises the first magnetic bead (L1), the second magnetic bead (L2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5) and the 6th electric capacity (C6), described the first magnetic bead (L1) two ends connect respectively the 7th pin of positive source and the first amplifier (A1), described the 3rd electric capacity (C3) and the 4th electric capacity (C4) parallel branch one end forming in parallel is connected on the circuit between the first magnetic bead (L1) and the first amplifier (A1), its other end ground connection, described the second magnetic bead (L2) two ends connect respectively the 4th pin of power cathode and the first amplifier (A1), described the 5th electric capacity (C5) and the 6th electric capacity (C6) parallel branch one end forming in parallel is connected on the circuit between the second magnetic bead (L2) and the first amplifier (A1), its other end ground connection.
5. the amplification module of detectable signal in transformer station according to claim 1 gas concentration detection system, it is characterized in that, also comprise the 5th resistance (R5), described the 5th resistance (R5) one end is connected on amplifying signal outlet line, its other end external power supply.
6. the amplification module of detectable signal in transformer station according to claim 1 gas concentration detection system, is characterized in that, described the second amplifier (A2) adopts OP777 chip.
7. according to the amplification module of detectable signal in the transformer station's gas concentration detection system described in any one in claim 1～6, it is characterized in that, described elementary amplifying circuit also comprises the first electric capacity (C1), the second electric capacity (C2), the first resistance (R1) and the second resistance (R2), described the first electric capacity (C1) one end is connected with the inverting input of the first amplifier (A1), the second electric capacity (C2) one end is connected with the in-phase input end of the first amplifier (A1), both homogeneous end ground connection of the first resistance (R1) and the second resistance (R2), the first resistance (R1) the relatively other end of its earth terminal is connected on the circuit between the first electric capacity (C1) and the first amplifier (A1) inverting input, the second resistance (R2) the relatively other end of its earth terminal is connected on the circuit between the second electric capacity (C2) and the first amplifier (A1) in-phase input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420327877.7U CN203883778U (en) | 2014-06-19 | 2014-06-19 | Amplification module for detected signals in substation gas concentration detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420327877.7U CN203883778U (en) | 2014-06-19 | 2014-06-19 | Amplification module for detected signals in substation gas concentration detection system |
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| Publication Number | Publication Date |
|---|---|
| CN203883778U true CN203883778U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420327877.7U Expired - Lifetime CN203883778U (en) | 2014-06-19 | 2014-06-19 | Amplification module for detected signals in substation gas concentration detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038169A (en) * | 2014-06-19 | 2014-09-10 | 国网四川省电力公司成都市新都供电分公司 | Amplification module for detecting signals in gas concentration detecting system of transformer substation |
| CN106425681A (en) * | 2016-06-29 | 2017-02-22 | 北京航天控制仪器研究所 | Machine tool cutter micro-feeding micrometer device and method |
-
2014
- 2014-06-19 CN CN201420327877.7U patent/CN203883778U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038169A (en) * | 2014-06-19 | 2014-09-10 | 国网四川省电力公司成都市新都供电分公司 | Amplification module for detecting signals in gas concentration detecting system of transformer substation |
| CN106425681A (en) * | 2016-06-29 | 2017-02-22 | 北京航天控制仪器研究所 | Machine tool cutter micro-feeding micrometer device and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |