CN203883812U - Detected signal converting module in transformer station gas concentration detecting system - Google Patents
Detected signal converting module in transformer station gas concentration detecting system Download PDFInfo
- Publication number
- CN203883812U CN203883812U CN201420328110.6U CN201420328110U CN203883812U CN 203883812 U CN203883812 U CN 203883812U CN 201420328110 U CN201420328110 U CN 201420328110U CN 203883812 U CN203883812 U CN 203883812U
- Authority
- CN
- China
- Prior art keywords
- resistance
- voltage
- pin
- frequency converter
- gas concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 230000001052 transient effect Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 abstract description 12
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000001914 filtration Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a detected signal converting module in a transformer station gas concentration detecting system. The detected signal converting module comprises a voltage signal input wire, a voltage frequency converter, a frequency signal output wire, a first resistor, a second resistor, a fifth resistor, a first adjustable resistor, a second adjustable resistor, and a first capacitor. The two ends of the first resistor are connected with the voltage signal input wire and the voltage frequency converter, respectively. The frequency signal output wire is connected with the voltage frequency converter. One end of the first capacitor is connected with a line between the first resistor and the voltage frequency converter. The other end of the first capacitor is connected with ground. One end of the second resistor is connected with the voltage frequency converter. The other end of the second resistor is connected with movable contact of the first adjustable resistor. The two ends of the fifth resistor are connected with the voltage frequency converter and the second adjustable resistor, respectively. The other end of the second adjustable resistor is connected with ground. When the detected signal converting module performs analog-to-digital conversion on a signal detected by a sensor, converting precision can be guaranteed and the accuracy of transformer station gas concentration detection is further improved.
Description
Technical field
the utility model relates to substation safety protection field, the specifically modular converter 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 volumetric concentration signal detecting to voltage signal, and shows gas concentration value by digital display circuit after analog to digital conversion circuit conversion.Analog to digital conversion circuit in this transformer station's gas concentration detection system directly adopts analog to digital converter to realize, and when its application, precision is lower, and then can affect the accuracy of detection.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and the modular converter of detectable signal in a kind of transformer station's gas concentration detection system that can ensure conversion accuracy when sensor detection signal is converted to digital signal is provided.
The utility model addresses the above problem and is achieved through the following technical solutions: the modular converter of detectable signal in transformer station's gas concentration detection system, comprise voltage signal input line, Voltage-to-frequency Converter, frequency signal output line, the first resistance, the second resistance, the 3rd resistance, the 5th resistance, the first adjustable resistance, the second adjustable resistance and the first electric capacity, described the first resistance two ends are connected with the 7th pin of voltage signal input line and Voltage-to-frequency Converter respectively, frequency signal output line is connected with the three-prong of Voltage-to-frequency Converter, first electric capacity one end is connected on the circuit between the first resistance and Voltage-to-frequency Converter the 7th pin, its other end ground connection, described second resistance one end is connected with the first pin and the 6th pin of Voltage-to-frequency Converter simultaneously, and its other end is connected with the moving contact of the first adjustable resistance, and the first adjustable resistance two ends connect respectively VDD-to-VSS, described the 3rd resistance one end is connected with the 5th pin of voltage changer, the equal external power supply of the 8th pin of its other end and voltage changer, described the 5th resistance two ends are connected with the second pin and second adjustable resistance of Voltage-to-frequency Converter respectively, and the second adjustable resistance connects the other end of the 5th resistance terminal and the equal ground connection of the 4th pin of voltage changer relatively.When the utility model application, the signal that transducer detects is inputted by voltage signal input line, input voltage frequency changer after the filter circuit filtering of the first resistance and the first electric capacity formation, voltage transitions is become pulse train by Voltage-to-frequency Converter, and then through frequency signal output line output linearity frequency signal.
Further, the modular converter of detectable signal in transformer station's gas concentration detection system, also comprise the first transient voltage twin zener dioder, the connected node of the first electric capacity circuit between the first resistance and Voltage-to-frequency Converter is first node, first transient voltage twin zener dioder one end is connected on the circuit between first node and Voltage-to-frequency Converter the 7th pin, its other end ground connection.Wherein, the utility model when application the first transient voltage twin zener dioder can conducting over the ground within the utmost point short time, electrostatic interference can be introduced to ground, thereby can protect the utility model.
Further, the modular converter of detectable signal in transformer station's gas concentration detection system, also comprises the 4th resistance, and described the 4th resistance one end is connected on frequency signal output line, its another termination power.
Further, the modular converter of detectable signal in transformer station's gas concentration detection system, also comprises the second electric capacity, and described second electric capacity one end is connected on the circuit between the 5th pin and the 3rd resistance of voltage changer, its other end ground connection.
Further, described Voltage-to-frequency Converter adopts LM331 chip.
In sum, the utlity model has following beneficial effect: the utility model overall structure is simple, be convenient to realize, cost is low, when the utility model application, signal transducer being detected by the first resistance and the first electric capacity carries out filtering, by Voltage-to-frequency Converter, voltage transitions is become to the train of impulses again, the instantaneous cycle of the pulse train that Voltage-to-frequency Converter generates is accurately proportional with analog quantity, because frequency available digital method is measured, so, can realize the conversion of mould/number, and the utility model carries out transformation energy by the mode of the conversion using frequency as intermediate quantity to sensor detection signal and ensures conversion accuracy.
Brief description of the drawings
Fig. 1 is the structural representation of a specific embodiment of the utility model.
In accompanying drawing, the corresponding name of Reference numeral is called: 1, voltage signal input line, 2, frequency signal output line, 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, D1, the first transient voltage twin zener dioder.
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 1:
As shown in Figure 1, the modular converter of detectable signal in transformer station's gas concentration detection system, comprises voltage signal input line 1, Voltage-to-frequency Converter, frequency signal output line 2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the first adjustable resistance RW1, the second adjustable resistance RW2, the first capacitor C 1 and the second capacitor C 2.The Voltage-to-frequency Converter of the present embodiment adopts LM331 chip, wherein, LM331 chip is single supply work, supply voltage scope is 4.5～20V, it has, and temperature stability is good, noise inhibiting ability strong, data transmission is convenient, range regulates the characteristics such as simple, linearity error is little, low in energy consumption, LM331 chip has 8 pins, and its first pin is Iout pin, and this pin is an inner precision current source output terminal; The second pin is Is pin, and this pin is reference current output; Three-prong is Fout pin, and this pin is pulse frequency output; The 4th pin is GND pin, and this pin is ground pin; The 5th pin is R/C pin, and this pin is external timing resistance and timing capacitor end; The 6th pin is Vt pin, and this pin is threshold voltage input; The 7th pin is Vin pin, and this pin is the external voltage input being converted; The 8th pin is Vcc pin, the external 15V power supply of this pin.
First resistance R 1 two ends of the present embodiment are connected with the 7th pin of voltage signal input line 1 and Voltage-to-frequency Converter respectively, frequency signal output line 2 is connected with the three-prong of Voltage-to-frequency Converter, first capacitor C 1 one end is connected on the circuit between the first resistance R 1 and Voltage-to-frequency Converter the 7th pin, its other end ground connection.Second resistance R 2 one end are connected with the first pin and the 6th pin of Voltage-to-frequency Converter simultaneously, and its other end is connected with the moving contact of the first adjustable resistance RW1, and the termination at the first adjustable resistance RW1 two ends connects respectively 15V VDD-to-VSS.The 3rd resistance R 3 one end are connected with the 5th pin of voltage changer, the external 15V power supply of its other end, and second capacitor C 2 one end are connected on the circuit between the 5th pin and the 3rd resistance R 3 of voltage changer, its other end ground connection.The 5th resistance R 5 two ends are connected with the second pin and the second adjustable resistance RW2 of Voltage-to-frequency Converter respectively, and the second adjustable resistance RW2 connects the other end of the 5th resistance R 5 ends and the equal ground connection of the 4th pin of voltage changer relatively.
In the present embodiment, the resistance of the first resistance R 1 is 100K Ω, the resistance of the second resistance R 2 is 170 K Ω, the resistance of the 3rd resistance R 3 is 6.8K Ω, the resistance of the 4th resistance R 4 is 10 K Ω, the resistance of the 5th resistance R 5 is 308 K Ω, the resistance adjustable extent of the first adjustable resistance RW1 is 0～47 K Ω, and the resistance adjustable extent of the second adjustable resistance RW2 is 0～10 K Ω, and the first capacitor C 1 and both capacitances of the second capacitor C 2 are 0.1 μ F.
In the present embodiment, the first resistance R 1 and the first capacitor C 1 form input filter link, the ripple in filtering input signal, and the first adjustable resistance RW1 is as zero potentiometer, and the second adjustable resistance RW2 is that conversion gain regulates.The signal that when the present embodiment application, transducer detects is inputted by voltage signal input line 1, after Voltage-to-frequency Converter is processed, is exported by frequency signal output line 2 again.
Embodiment 2:
The present embodiment has been made following further restriction on the basis of embodiment 1: the present embodiment also comprises the first transient voltage twin zener dioder D1, the connected node of the first capacitor C 1 circuit between the first resistance R 1 and Voltage-to-frequency Converter is first node, first transient voltage twin zener dioder D1 one end is connected on the circuit between first node and Voltage-to-frequency Converter the 7th pin, its other end ground connection.In the present embodiment when application,, the first transient voltage twin zener dioder D1 can conducting over the ground within the utmost point short time, thereby reaches the object of electrostatic interference being introduced to ground, and then makes the present embodiment have the ability that absorbs electrostatic pulse, can avoid the components and parts of the present embodiment to damage.
As mentioned above, can realize preferably the utility model.
Claims (5)
1. the modular converter of detectable signal in transformer station's gas concentration detection system, it is characterized in that, comprise voltage signal input line (1), Voltage-to-frequency Converter, frequency signal output line (2), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 5th resistance (R5), the first adjustable resistance (RW1), the second adjustable resistance (RW2) and the first electric capacity (C1), described the first resistance (R1) two ends are connected with the 7th pin of voltage signal input line (1) and Voltage-to-frequency Converter respectively, frequency signal output line (2) is connected with the three-prong of Voltage-to-frequency Converter, the first electric capacity (C1) one end is connected on the circuit between the first resistance (R1) and Voltage-to-frequency Converter the 7th pin, its other end ground connection, described the second resistance (R2) one end is connected with the first pin and the 6th pin of Voltage-to-frequency Converter simultaneously, and its other end is connected with the moving contact of the first adjustable resistance (RW1), and the first adjustable resistance (RW1) two ends connect respectively VDD-to-VSS, described the 3rd resistance (R3) one end is connected with the 5th pin of voltage changer, the equal external power supply of the 8th pin of its other end and voltage changer, described the 5th resistance (R5) two ends are connected with the second pin and second adjustable resistance (RW2) of Voltage-to-frequency Converter respectively, and the second adjustable resistance (RW2) connects the other end of the 5th resistance (R5) end and the equal ground connection of the 4th pin of voltage changer relatively.
2. the modular converter of detectable signal in transformer station according to claim 1 gas concentration detection system, it is characterized in that, also comprise the first transient voltage twin zener dioder (D1), the connected node of the first electric capacity (C1) circuit between the first resistance (R1) and Voltage-to-frequency Converter is first node, first transient voltage twin zener dioder (D1) one end is connected on the circuit between first node and Voltage-to-frequency Converter the 7th pin, its other end ground connection.
3. the modular converter of detectable signal in transformer station according to claim 1 gas concentration detection system, it is characterized in that, also comprise the 4th resistance (R4), it is upper that described the 4th resistance (R4) one end is connected to frequency signal output line (2), its another termination power.
4. the modular converter of detectable signal in transformer station according to claim 1 gas concentration detection system, it is characterized in that, also comprise the second electric capacity (C2), described the second electric capacity (C2) one end is connected on the circuit between the 5th pin and the 3rd resistance (R3) of voltage changer, its other end ground connection.
5. according to the modular converter of detectable signal in the transformer station's gas concentration detection system described in any one in claim 1～4, it is characterized in that, described Voltage-to-frequency Converter adopts LM331 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328110.6U CN203883812U (en) | 2014-06-19 | 2014-06-19 | Detected signal converting module in transformer station gas concentration detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328110.6U CN203883812U (en) | 2014-06-19 | 2014-06-19 | Detected signal converting module in transformer station gas concentration detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203883812U true CN203883812U (en) | 2014-10-15 |
Family
ID=51684271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420328110.6U Expired - Lifetime CN203883812U (en) | 2014-06-19 | 2014-06-19 | Detected signal converting module in transformer station gas concentration detecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203883812U (en) |
-
2014
- 2014-06-19 CN CN201420328110.6U patent/CN203883812U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102692883B (en) | An analog input circuit for engineering-machinery-dedicated controller | |
| CN205404670U (en) | Transmission line transient state current collection device | |
| CN207181522U (en) | Novel DC electric energy meter | |
| CN203759112U (en) | High-frequency current detection circuit | |
| CN204633623U (en) | A kind of precise rectification circuit | |
| CN203883811U (en) | Analog-to-digital converting module of transformer station gas concentration detecting system | |
| CN205643468U (en) | Electronic voltage transformer suitable for smart power grid power quality detection | |
| CN202092805U (en) | Signal acquisition circuit of force sensor | |
| CN203881355U (en) | Circuit for converting detected signal in transformer station gas concentration detection system | |
| CN203883812U (en) | Detected signal converting module in transformer station gas concentration detecting system | |
| CN204008832U (en) | A kind of sampling A/D chip and the sample circuit of built-in AD to same passage of measuring | |
| CN204188299U (en) | Multichannel IGBT inner NTC high temperature real-time detection circuit | |
| CN104038229A (en) | Analog-digital conversion module of gas-concentration detecting system of transformer substation | |
| CN107422182A (en) | Direct current energy meter | |
| CN204945235U (en) | A kind of AC voltage sampling circuit | |
| CN203561373U (en) | Measuring circuit of capacitive transducer | |
| CN103868617A (en) | Platinum resistor temperature measuring circuit | |
| CN203519728U (en) | Differential capacitance type sensor detection circuit | |
| CN203337716U (en) | Residual current sampling circuit for auto-reclosing moulded case circuit breaker | |
| CN104034356A (en) | Circuit for converting detected signal in gas concentration detection system of transformer substation | |
| CN103293386B (en) | A kind of proving installation of insulation resistance and method | |
| CN207601291U (en) | A kind of DC voltage transmitter calibrated using digital form | |
| CN206370822U (en) | The phase-shifting trigger module of AI instrument | |
| CN201955395U (en) | Sensor frequency transmitter circuit | |
| CN202217012U (en) | Microcurrent detection module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141015 |