CN201285411Y - Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system - Google Patents
Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system Download PDFInfo
- Publication number
- CN201285411Y CN201285411Y CNU2008201785057U CN200820178505U CN201285411Y CN 201285411 Y CN201285411 Y CN 201285411Y CN U2008201785057 U CNU2008201785057 U CN U2008201785057U CN 200820178505 U CN200820178505 U CN 200820178505U CN 201285411 Y CN201285411 Y CN 201285411Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- direct current
- current signal
- output
- filter capacitor
- 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
Images
Landscapes
- Amplifiers (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model relates to a three-terminal isolation measuring device of slowly-varying dc signal for a telemetry system, comprising a three-terminal isolation amplifier D1, divider resistors R1 and R2 of slowly-varying dc signal of an input terminal, a filter capacitor C1, first-order feedback amplification resistors RF and RA, second-order feedback amplification resistors RX and RK, a protection resistor R3 of an output terminal, a pull-up resistor R4, a filter capacitor C4, diodes V1 and V2 limiting the positive and the negative of the output signal, a load-matching RB and filter capacitors C2 and C3 at the positive terminal and the negative terminal of the second-order output voltage of the three-terminal isolation amplifier D1. The utility model has the advantages of good isolation capability, high precision and reliability, reasonable parameter configuration of circuit elements and strong stability of measure accuracy and zero position.
Description
Technical field
The utility model relates to the aircraft telemetry system with gradual direct current signal measuring technique, is specifically related to a kind of telemetry system with gradual direct current signal three end isolation measurement devices.
Background technology
Aircraft has a large amount of gradual voltage, current signal to need remote measurement to measure based on the external system of control system.Measuring what often use at the gradual direct current signal of other field all is the two ends isolating amplifier circuits, the effect that telemetry system will reach input, output, power supply three ends just must increase a pair of insulating power supply, at least to carry out 9 tunnel gradual direct current signal metering circuits as telemetry system with gradual direct current signal three end isolation measurement devices, this just needs to increase at least 9 pairs of insulating power supplies, not only improved design cost, increased equipment volume, the ripple that has also increased signal disturbs.
Summary of the invention
The purpose of this utility model is to provide a kind of and can realizes the high telemetry system of Signal Spacing, precision and the reliability of telemetry system and external system with gradual direct current signal three end isolation measurement devices.
Realize the technical scheme of the utility model purpose: a kind of telemetry system is with gradual direct current signal three end isolation measurement devices, this device comprises three end isolated amplifier D1, the gradual direct current signal divider resistance R1 of input end, R2, filter capacitor C1, the one-level feedback, amplify resistance R F, RA, the secondary feedback, amplify resistance R X, RK, output terminal protective resistance R3, pull-up resistor R4, filter capacitor C4, diode V1 to the positive and negative amplitude limit of output signal, V2, and load matched resistance R B and three end isolated amplifier D1 secondary output voltages are just, the filter capacitor C2 of negative terminal, C3; Described three end isolated amplifier D1 are input, output, power supply three end isolated amplifiers; Wherein gradual direct current signal divider resistance R1, the R2 of input end and filter capacitor C1 are connected with two input end pin 7,3 of three end isolated amplifier D1 respectively; Amplify resistance R F, RA and connect to form one-level feedback, amplifying circuit with two pin 6,10 of three end isolated amplifier D1 respectively; Amplify resistance R X, RK and connect to form secondary feedback, amplifying circuit with two pin 14,15 of three end isolated amplifier D1 respectively; The output terminal pin 15 of three end isolated amplifier D1 is connected with output protection resistance R 3, and output protection resistance R 3 other ends are the same to draw resistance R 4, filter capacitor C4, diode V1, the V2 of the positive and negative amplitude limit of output signal connected; Two pin 12,16 of three end isolated amplifier D1 also connect with filter capacitor C2, the C3 of the positive and negative end of secondary output voltage respectively, and the two-stage amplifier input end of three end isolated amplifier D1 connects with load matched resistance R B.
Aforesaid a kind of telemetry system is with gradual direct current signal three end isolation measurement devices, and described three end isolated amplifier D1 are the BB3656 isolated amplifier.
Aforesaid a kind of telemetry system is with gradual direct current signal three end isolation measurement devices, and described gradual direct current signal divider resistance R1, R2 resistance value sum are more than or equal to 1M Ω.
Aforesaid a kind of telemetry system is with gradual direct current signal three end isolation measurement devices, and the resistance of described I and II feedback resistance RF, RX is more than or equal to 200K Ω.
Effect of the present utility model is: telemetry system described in the utility model is with gradual direct current signal three end isolation measurement devices, can realize Signal Spacing function to telemetry system and external system, various forms of direct current signals are transformed into the direct current signal of 0～5V linear change, offer the telemetry system sampler and coder and carry out the A/D conversion.The utility model device isolation performance is good, precision and reliability height, and the circuit devcie parameter configuration is reasonable, can realize the stability of measuring accuracy and zero-bit.
Description of drawings
Fig. 1 is a telemetry system described in the utility model with gradual direct current signal three end isolation measurement device circuit figure.
Embodiment
Below in conjunction with accompanying drawing telemetry system described in the utility model is further described with gradual direct current signal three end isolation measurements:
As shown in Figure 1; telemetry system described in the utility model is with gradual direct current signal three end isolation measurement devices; it comprises gradual direct current signal divider resistance R1 and R2, the filter capacitor C1 of input end; three end isolated amplifier D1; one-level feedback, amplification resistance R F and RA; secondary feedback, amplification resistance R X and RK; output terminal protective resistance R3, pull-up resistor R4, filter capacitor C4 and positive and negative limiter diode V1 and V2, the load matched resistance R B that needs and filter capacitor C2, the C3 of the positive and negative end of three end isolated amplifier D1 secondary output voltages in addition.
Input signal is connected with input end pin 7, the pin 3 of three end isolated amplifier D1 through gradual direct current signal divider resistance R1, R2 and filter capacitor C1.The pin 6 of resistance R F, RA and three end isolated amplifier D1, pin 10 connect to form one-level feedback, amplifying circuit.The pin 14 of resistance R X, RK and three end isolated amplifier D1, pin 15 connect to form secondary feedback, amplifying circuit.The pin 15 of three end isolated amplifier D1 is connected with output protection resistance R 3.Output protection resistance R 3 other ends are the same to draw resistance R 4, filter capacitor C4, diode V1, the V2 of the positive and negative amplitude limit of output signal connected.Two pin 12,16 of three end isolated amplifier D1 also connect with filter capacitor C2, the C3 of the positive and negative end of secondary output voltage respectively.The two-stage amplifier input end of three end isolated amplifier D1 connects with load matched resistance R B.Change the size of resistance R F, RA, RX, RK, can change three end isolated amplifier D1 output signal sizes, the size that changes R4 can improve the output of signal zero-bit, bipolar signal is changed into unipolar signal output, diode V1, V2 carry out positive and negative amplitude limit to output signal, guarantee the reliable received signal of telemetry system.
Three end isolated amplifier D1 are input, output, power supply three end isolated amplifiers, select the BB3656 isolated amplifier here for use.Gradual direct current signal divider resistance R1, R2 can adopt power consumption and withstand voltage meeting the demands, and R1, R2 resistance value sum be greater than any resistance of 1M Ω, also can a plurality of resistance serial or parallel connections, and its resistance and power are decided according to the size of gradual DC voltage.Resistance R F, RA, RX, RK resistance can be selected according to system's needs, and wherein RA, RK can be fixed resistances, also can be variable resistors, and the resistance of RF, RX can not be less than 200K Ω.Resistance R 3 is an output protection resistance, prevents that the external system short circuit of exporting connection from causing damage to this device, and resistance is decided according to the external system receiving circuit.Capacitor C 4 can be any electric capacity, and its capacitance is decided according to the circuit needs.Diode V1, V2 guarantee that the maximum limit amplitude of this device output signal and irreducible minimum amplitude satisfy system requirements, and the size of amplitude limit value depends on this size to supply voltage of VCC, and they can be the diodes that satisfies the circuit requirement of withstand voltage arbitrarily.Resistance R B is a load matched resistance, and resistance value depends on RA and RF resistance sum, improves the stability of signal zero-bit.Two groups of power vd D, VCC adopt secondary power supply, reduce the influence of power supply ripple to output signal, improve the signal measurement precision.
Claims (4)
1. a telemetry system is with gradual direct current signal three end isolation measurement devices, it is characterized in that: this device comprises three end isolated amplifiers (D1), the gradual direct current signal divider resistance (R1 of input end, R2), filter capacitor (C1), the one-level feedback, amplify resistance (RF, RA), the secondary feedback, amplify resistance (RX, RK), output terminal protective resistance (R3), pull-up resistor (R4), filter capacitor (C4), diode (V1 to the positive and negative amplitude limit of output signal, V2), and load matched resistance (RB) and three end isolated amplifier (D1) secondary output voltages just, filter capacitor (the C2 of negative terminal, C3); Described three end isolated amplifiers (D1) are input, output, power supply three end isolated amplifiers; Wherein the gradual direct current signal divider resistance (R1, R2) of input end and filter capacitor (C1) are connected with two input end pin (7,3) of three end isolated amplifiers (D1) respectively; Amplify resistance (RF, RA) and connect to form one-level feedback, amplifying circuit with two pin (6,10) of three end isolated amplifiers (D1) respectively; Amplify resistance (RX, RK) and connect to form secondary feedback, amplifying circuit with two pin (14,15) of three end isolated amplifiers (D1) respectively; The output terminal pin (15) of three end isolated amplifiers (D1) is connected with output protection resistance (R3), and output protection resistance (R3) other end is the same to draw resistance (R4), filter capacitor (C4), the diode (V1, V2) of the positive and negative amplitude limit of output signal is connected; Two pin (12,16) of three end isolated amplifiers (D1) also connect with the filter capacitor (C2, C3) of the positive and negative end of secondary output voltage respectively, and the two-stage amplifier input end of three end isolated amplifiers (D1) connects with load matched resistance (RB).
2. a kind of telemetry system according to claim 1 is with gradual direct current signal three end isolation measurement devices, and it is characterized in that: described three end isolated amplifiers (D1) are the BB3656 isolated amplifier.
3. a kind of telemetry system according to claim 1 and 2 is with gradual direct current signal three end isolation measurement devices, and it is characterized in that: described gradual direct current signal divider resistance (R1, R2) resistance value sum is more than or equal to 1M Ω.
4. a kind of telemetry system according to claim 1 and 2 is with gradual direct current signal three end isolation measurement devices, and it is characterized in that: the resistance of described I and II feedback resistance (RF, RX) is more than or equal to 200K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201785057U CN201285411Y (en) | 2008-10-31 | 2008-10-31 | Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201785057U CN201285411Y (en) | 2008-10-31 | 2008-10-31 | Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285411Y true CN201285411Y (en) | 2009-08-05 |
Family
ID=40950397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201785057U Expired - Lifetime CN201285411Y (en) | 2008-10-31 | 2008-10-31 | Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201285411Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995543A (en) * | 2010-10-09 | 2011-03-30 | 佛山市中格威电子有限公司 | Electric control board testing platform with detection signal and power supply isolation function |
| CN111323693A (en) * | 2020-03-18 | 2020-06-23 | Oppo广东移动通信有限公司 | Test circuit, mainboard and terminal equipment |
-
2008
- 2008-10-31 CN CNU2008201785057U patent/CN201285411Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995543A (en) * | 2010-10-09 | 2011-03-30 | 佛山市中格威电子有限公司 | Electric control board testing platform with detection signal and power supply isolation function |
| CN111323693A (en) * | 2020-03-18 | 2020-06-23 | Oppo广东移动通信有限公司 | Test circuit, mainboard and terminal equipment |
| CN111323693B (en) * | 2020-03-18 | 2022-01-07 | Oppo广东移动通信有限公司 | Test circuit, mainboard and terminal equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2938119Y (en) | Photoelectric coupling AC voltage separation measuring circuit | |
| CN103698579A (en) | Direct-current voltage sampling device of low-voltage frequency converter | |
| CN203643502U (en) | Full-automatic microcurrent detection device | |
| CN201285411Y (en) | Graded DC signal tri-terminal isolation measurement apparatus for remote measuring system | |
| CN203759090U (en) | Current sampling circuit of rail-transit traction data acquisition system | |
| CN103558435A (en) | 35kV broadband electronic type voltage transformer | |
| CN102035546A (en) | Voltage current transformer | |
| CN104931996B (en) | The signal condition system of Larger Dynamic fast pulse in radiation detection | |
| CN203069764U (en) | Electric parameter measurement circuit of battery pack | |
| CN102955070A (en) | Resistance measuring circuit | |
| CN104635830A (en) | Voltage signal conditioning circuit based on controllable precise voltage regulator | |
| CN203054063U (en) | Input voltage measuring circuit for high-voltage frequency converter | |
| CN108037787A (en) | A kind of A/D chip input voltages limiter protection circuit | |
| CN204575838U (en) | A kind of meter resistance measurement mechanism | |
| CN103412194A (en) | Capacitance measuring and calculating circuit | |
| CN208174644U (en) | A kind of number tunable capacitor circuit | |
| CN203204048U (en) | Output voltage measurement circuit for high-voltage frequency converter | |
| CN103293386B (en) | A kind of proving installation of insulation resistance and method | |
| CN102290977B (en) | Flow equalization control circuit of switching power supply maximum value with offset direct current | |
| CN106130558A (en) | DA change-over circuit based on PWM and capacitor charge and discharge principle | |
| CN103383415A (en) | Resistance and capacitance online testing circuit | |
| CN203587675U (en) | Integrated AD type singlechip microcomputer power AC sampling circuit | |
| CN109962687B (en) | Automatic transconductance control amplifying circuit | |
| CN203299678U (en) | Anti-interference voltage-stabilized source | |
| CN101860343B (en) | Digital rheostat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090805 |
|
| CX01 | Expiry of patent term |