CN105162425A - Differential integrator acquisition terminal - Google Patents

Differential integrator acquisition terminal Download PDF

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Publication number
CN105162425A
CN105162425A CN201510488186.4A CN201510488186A CN105162425A CN 105162425 A CN105162425 A CN 105162425A CN 201510488186 A CN201510488186 A CN 201510488186A CN 105162425 A CN105162425 A CN 105162425A
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China
Prior art keywords
integrator
signal
pole double
throw switch
spdt
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CN201510488186.4A
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Chinese (zh)
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CN105162425B (en
Inventor
罗庆
罗世培
聂龙华
沈军
叶富强
刘刚
庞平
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SICHUAN XINGZHI ZHIHUI INTELLECTUAL PROPERTY OPERATION CO., LTD.
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CHENGDU SIBANGLIKE TECHNOLOGY Co Ltd
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Abstract

The invention discloses a differential integrator acquisition terminal. The differential integrator acquisition terminal comprises an integrator A, an integrator B, a differential instrument amplifier and a filter, wherein the integrator A, the integrator B and the filter are all connected to the differential instrument amplifier; one path of input signal Vin1 signal end on the integrator A is connected to a fixed end a of a single-pole double-throw switch S1 firstly; the movable end of the single-pole double-throw switch S1 is connected to the integrator A; another path of input signal Vin2 signal end on the integrator A is connected to the fixed end a of a single-pole double-throw switch S2; the movable end of the single-pole double-throw switch S2 is connected to the integrator A; the signal output end of the filter is also connected with the fixed end a of a switch S3; the movable end of the switch S3 is connected with a buffer in sequence; and the fixed end b of the switch S3 is connected with an analog signal input end Vin3 signal end. Through the principle, integral measurement of a signal to be tested can be realized; analog compensation can be performed on signal conditioning; and small offset and small drift are realized.

Description

Differential integrator acquisition terminal machine
Technical field
The present invention relates to signal integration fields of measurement, be specifically related to differential integrator acquisition terminal machine.
Background technology
People, in order to utilize signal, will process it.Such as, when the signal of telecommunication is small and weak, need to amplify it; When being mixed with noise, need to carry out filtering I when frequency is not suitable for transmission to it, need to carry out modulating and demodulation; When signal runs into distorton, need it balanced; When signal type is a lot, need to carry out identifying etc.Signal transacting extracts characteristic signal exactly in event change process, through going interference, analyze, the process such as comprehensive, conversion and computing, thus obtain the process reflecting event change essence or the interested information of processor.Imaging signal treatment system is widely used in military affairs in the world today, industry, high-energy physics, the fields such as agricultural and medical treatment.In order to obtain high-quality and be convenient to observe image, front-end processing must be carried out as the function such as filtering, amplification to original image signal, then measured signal is transferred to host computer.And a most important step is exactly the integral measurement to measured signal in this course, and require very high to the integral measurement of measured signal, need very high precision, analog compensation can be carried out to signal transacting, offset little, drift about little.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, provide differential integrator acquisition terminal machine, this device can realize the integral measurement to measured signal, can also carry out analog compensation to signal condition, offsets little and drifts about little.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: differential integrator acquisition terminal machine, comprise integrator A, integrator B, difference instrument amplifier and filter, described integrator A, integrator B and filter are all connected on difference instrument amplifier, on integrator A Shang mono-road, input signal Vin1 signal end first connects on the fixed end a of single-pole double-throw switch (SPDT) S1, the moved end of single-pole double-throw switch (SPDT) S1 is connected on integrator A, another road input signal Vin2 signal end on integrator A first connects on the fixed end a of single-pole double-throw switch (SPDT) S2, the moved end of single-pole double-throw switch (SPDT) S2 is connected on integrator A, the port a of the signal output part of described filter also connecting valve S3, the port c of switch S 3 also connects buffer successively, removes back panel connector and capacitor discharge control circuit, capacitor discharge control circuit also connects integrator A, go back panel connector also to connect integrator A sum-product intergrator B, the port b connecting analog signal input part Vin3 signal end of switch S 3 simultaneously.Switch S 3 can access two paths of signals to buffer simultaneously.After the moved end of single-pole double-throw switch (SPDT) S1 is connected with fixed end a, input signal advanced person becomes owner of after integrator A carries out integral operation, signal is passed to successively after difference instrument amplifier and filter carry out amplification and filtering process and integrating analog signal is outputted to buffer, the analog signal Vin3 simultaneously also demarcated to buffer input components and parts enters back panel connector together, through back panel connector, signal is passed to capacitor discharge control circuit simultaneously, integrator A sum-product intergrator B, signal after the process of capacitor discharge control circuit passes to integrator A again, integrator A passes to difference instrument amplifier again, the analog compensation signal that simultaneously integrator B produces also passes to after difference instrument amplifier carries out amplification, the imitated output quantity of high-precision measured signal is exported after filter filtering.The analog compensation of integrator B for the signal condition to measured signal is set in the apparatus, make measured signal offset in difference integral process little, drift about little, the certainty of measurement of each device is high, simultaneously again after amplification and filter action, thus exports high-precision integral measurement result.The differential amplifier used in this device has ultra-high input impedance, extremely good CMRR, low input offset, low output impedance, can amplify those signals under common-mode voltage, thus improves the accuracy of measured signal integral measurement result.
The described back panel connector that goes also connects capture card.Capture card can image data information, carries out digital compensation, provide the indexs such as the sampling time of data acquisition, acquisition precision and zero migration.
The fixed end b of described single-pole double-throw switch (SPDT) S1 and the equal ground connection of fixed end b of single-pole double-throw switch (SPDT) S2.When not needing access measured signal, the moved end then ground connection of single-pole double-throw switch (SPDT).
Input signal Vin1 signal end and input signal Vin2 signal end adopt the input of SMB coaxial cable.Support high-bandwidth communication, to adapt to the integral measurement requirement of the neutron imaging signal in high-energy physics field.
Compared with prior art, the invention has the beneficial effects as follows:
1, this device can realize the integral measurement structure to measured signal, and integrator B is used for the analog compensation to the signal condition of measured signal, make measured signal offset in difference integral process little, drift about little, the certainty of measurement of each device is high, simultaneously again after amplification and filter action, thus export high-precision integral measurement result.
2, the differential amplifier used in this device has ultra-high input impedance, extremely good CMRR, low input offset, low output impedance, can amplify those signals under common-mode voltage, thus improves the accuracy of measured signal integral measurement result.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited thereto.
Embodiment 1:
As shown in Figure 1, the present invention includes integrator A, integrator B, difference instrument amplifier and filter, described integrator A, integrator B and filter are all connected on difference instrument amplifier, on integrator A Shang mono-road, input signal Vin1 signal end first connects on the fixed end a of single-pole double-throw switch (SPDT) S1, the moved end of single-pole double-throw switch (SPDT) S1 is connected on integrator A, another road input signal Vin2 signal end on integrator A first connects on the fixed end a of single-pole double-throw switch (SPDT) S2, and the moved end of single-pole double-throw switch (SPDT) S2 is connected on integrator A; The signal output part of described filter also connects the port a of single-pole double-throw switch (SPDT) S3, the port c of single-pole double-throw switch (SPDT) S3 also connects buffer successively, removes back panel connector and capacitor discharge control circuit, capacitor discharge control circuit also connects integrator A, go back panel connector also to connect integrator A sum-product intergrator B, the port b connecting analog signal input part Vin3 signal end of single-pole double-throw switch (SPDT) S3 simultaneously.
Switch S 3 can access two paths of signals to buffer simultaneously.After the moved end of single-pole double-throw switch (SPDT) S1 is connected with fixed end a, input signal advanced person becomes owner of after integrator A carries out integral operation, signal is passed to successively after difference instrument amplifier and filter carry out amplification and filtering process and integrating analog signal is outputted to buffer, the analog signal Vin3 simultaneously also demarcated to buffer input components and parts enters back panel connector together, through back panel connector, signal is passed to capacitor discharge control circuit simultaneously, integrator A sum-product intergrator B, signal after the process of capacitor discharge control circuit passes to integrator A again, integrator A passes to difference instrument amplifier again, the analog compensation signal that simultaneously integrator B produces also passes to after difference instrument amplifier carries out amplification, the imitated output quantity of high-precision measured signal is exported after filter filtering.The analog compensation of integrator B for the signal condition to measured signal is set in the apparatus, make measured signal offset in difference integral process little, drift about little, the certainty of measurement of each device is high, simultaneously again after amplification and filter action, thus exports high-precision integral measurement result.The differential amplifier used in this device has ultra-high input impedance, extremely good CMRR, low input offset, low output impedance, can amplify those signals under common-mode voltage, thus improves the accuracy of measured signal integral measurement result.
Embodiment 2:
The present embodiment is preferably as follows on the basis of embodiment 1: go back panel connector also to connect capture card.Capture card can image data information, carries out digital compensation, provide the indexs such as the sampling time of data acquisition, acquisition precision and zero migration.
The fixed end b of described single-pole double-throw switch (SPDT) S1 and the equal ground connection of fixed end b of single-pole double-throw switch (SPDT) S2.When not needing access measured signal, the moved end then ground connection of single-pole double-throw switch (SPDT).
Input signal Vin1 signal end and input signal Vin2 signal end adopt the input of SMB coaxial cable.Support high-bandwidth communication, to adapt to the integral measurement requirement of the neutron imaging signal in high-energy physics field.
Just this invention can be realized as mentioned above.

Claims (4)

1. differential integrator acquisition terminal machine, it is characterized in that: comprise integrator A, integrator B, difference instrument amplifier and filter, described integrator A, integrator B and filter are all connected on difference instrument amplifier, on integrator A Shang mono-road, input signal Vin1 signal end first connects on the fixed end a of single-pole double-throw switch (SPDT) S1, the moved end of single-pole double-throw switch (SPDT) S1 is connected on integrator A, another road input signal Vin2 signal end on integrator A first connects on the fixed end a of single-pole double-throw switch (SPDT) S2, and the moved end of single-pole double-throw switch (SPDT) S2 is connected on integrator A; The port a of the signal output part of described filter also connecting valve S3, the port c of switch S 3 also connects buffer successively, removes back panel connector and capacitor discharge control circuit, capacitor discharge control circuit also connects integrator A, go back panel connector also to connect integrator A sum-product intergrator B, the port b connecting analog signal input part Vin3 signal end of switch S 3 simultaneously.
2. differential integrator acquisition terminal machine according to claim 1, is characterized in that: described in go back panel connector also to connect capture card.
3. differential integrator acquisition terminal machine according to claim 1, is characterized in that: the fixed end b of described single-pole double-throw switch (SPDT) S1 and the equal ground connection of fixed end b of single-pole double-throw switch (SPDT) S2.
4. differential integrator acquisition terminal machine according to claim 1, is characterized in that: input signal Vin1 signal end and input signal Vin2 signal end adopt the input of SMB coaxial cable.
CN201510488186.4A 2015-08-11 2015-08-11 Differential integrator acquisition terminal machine Active CN105162425B (en)

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CN106018865A (en) * 2016-07-08 2016-10-12 北京天际翔达科技有限公司 Fully differential signal conditioning circuit for current excitation sensors

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CN106018865B (en) * 2016-07-08 2018-12-21 北京天际翔达科技有限公司 Fully differential signal conditioning circuit applied to current excitation sensor

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Patentee before: CHENGDU SIBANGLIKE TECHNOLOGY CO., LTD.