CN110658746A - Program-controlled capacitor device based on capacitor array - Google Patents
Program-controlled capacitor device based on capacitor array Download PDFInfo
- Publication number
- CN110658746A CN110658746A CN201910790695.0A CN201910790695A CN110658746A CN 110658746 A CN110658746 A CN 110658746A CN 201910790695 A CN201910790695 A CN 201910790695A CN 110658746 A CN110658746 A CN 110658746A
- Authority
- CN
- China
- Prior art keywords
- capacitance
- capacitor
- output
- array
- control
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 146
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000003491 array Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0421—Multiprocessor system
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/22—Pc multi processor system
- G05B2219/2231—Master slave
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a program-controlled capacitor device based on a capacitor array, which comprises an upper computer and a control system; the control system comprises a controller and a control circuit; the control circuit comprises a capacitor array output circuit; the upper computer is used for sending out an output capacitance instruction and outputting a capacitance; the control system receives an output capacitance instruction sent by the upper computer, inputs a capacitor and converts the input capacitor into a capacitor array to be output through a capacitor array output circuit, wherein the capacitor array is a plurality of paths of digital quantity capacitor signals connected in parallel; each path of digital capacitance signal of the capacitor array is controlled by a switch; the control system is also used for sending a switch instruction to the capacitor array, and the controller controls the capacitor output value of the capacitor array through the switch control of each path of digital quantity capacitor signal. The invention adopts the program control array capacitor device, can realize remote digital control, has high precision and high response speed, and meets the requirement of automatic modulation output of the capacitor.
Description
Technical Field
The invention belongs to the field of automatic control of capacitors, relates to an automatic capacitor control device, and particularly relates to a digital control output capacitor device.
Background
Capacitance value adjustable capacitors are often needed in electronic circuits, most of existing adjustable capacitors are mechanical capacitors, manpower is needed to be used as input of mechanical power, the mechanical adjustable capacitors need to be manually driven to switch or knob when capacitance values are changed, capacitance values are adjusted, repeated workload is large, accuracy is low, remote control cannot be achieved, and using requirements of automatic equipment cannot be met.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides a program-controlled capacitor device based on a capacitor array, which solves the technical problem of the current capacitor mechanical adjustment, and realizes the digital control output of the capacitor.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a program-controlled capacitor device based on a capacitor array comprises an upper computer and a control system; the control system comprises a controller and a control circuit; the control circuit comprises a capacitor array output circuit;
the upper computer is used for sending out an output capacitance instruction and outputting a capacitance;
the control system receives an output capacitance instruction sent by the upper computer, inputs a capacitor and converts the input capacitor into a capacitor array to be output through a capacitor array output circuit, wherein the capacitor array is a plurality of paths of digital quantity capacitor signals connected in parallel; each path of digital capacitance signal of the capacitor array is controlled by a switch control circuit;
the control system is also used for sending a switch instruction to the capacitor array, and the controller controls the capacitor output value of the capacitor array through the switch control of each path of digital quantity capacitor signal.
Furthermore, the control system also comprises a power supply conversion module, a serial port downloading module and a serial port communication module;
the power supply conversion module comprises a voltage reduction conversion module and a voltage stabilization module and is used for outputting 5V and 3.3V voltages;
the serial port downloading module is used for downloading the output capacitance value of the upper computer;
the serial port communication module is used for receiving an output capacitance instruction sent by the upper computer and sending a capacitance array switch instruction.
Furthermore, the control circuit also comprises a reset circuit and a starting configuration circuit;
the reset circuit is used for resetting the control circuit;
the starting configuration circuit is used for ensuring the normal starting of the controller.
Furthermore, the capacitor array is sixteen paths of digital quantity capacitor signals which are connected in parallel, each path is provided with a capacitor control module, the capacitance value of each four paths of capacitor signals is one order of magnitude, four orders of magnitude of decimal place, decimal place and hundreds of place are formed, and the capacitor signals of the same order of magnitude are connected in parallel and combined to ensure the precision of the capacitor output value of the capacitor array.
Further, the decimal place is a parallel combination of a capacitance value of 0.1pF, 0.2pF, 0.3pF and 0.4pF, the decimal place is a parallel combination of a capacitance value of 1pF, 2pF, 3pF and 4pF, the decimal place is a parallel combination of a capacitance value of 10pF, 20pF, 30pF and 40pF, and the hundreds place is a parallel combination of a capacitance value of 100pF, 200pF, 300pF and 400 pF.
Further, the control method of the capacitor array output circuit comprises the following steps:
and continuously comparing the residual required capacitance with hundreds digit, tens digit, digit and decimal digit according to the control method until the input capacitance is converted into a multipath digital quantity capacitance signal.
Wherein, every way digital quantity capacitance signal of capacitor array all passes through switch control, specifically is: each digital capacitance signal is converted into a switch output of direct current 12V voltage through an optical coupling switch chip, and then the on-off is controlled through a relay, and all capacitors are connected in parallel at a total output port after being respectively connected with the relay in series.
Preferably, the program-controlled capacitance device further comprises a capacitance measuring module, wherein the capacitance measuring module is used for measuring the capacitance output value of the capacitance array and feeding back the measured value to the control system, the control system compares the output capacitance with the measured value, and if the output capacitance is not equal to the measured value, the output capacitance or the capacitance array is adjusted until the output capacitance is equal to the measured value; and the capacitance measuring modules are respectively connected to the total output ports of the capacitor array output circuits.
Compared with the prior art, the invention has the beneficial effects that:
because the mechanical adjustable capacitor cannot meet the use requirement of automation equipment, compared with the mechanical adjustable capacitor, the invention adopts the program control array capacitor device, can realize remote digital control, and the MCU sends a switching instruction to the capacitor array, thereby having high precision and high response speed and meeting the requirement of automatic modulation output of the capacitor.
The invention uses the upper computer to control, directly sends the capacitance value to the MCU, after receiving the capacitance value instruction transmitted by the upper computer, the invention converts the input analog capacitance value into a plurality of paths of digital quantity output, the digital quantity signal is firstly converted into the switch output of the direct current 12V voltage through the optical coupling switch chip, and then the on-off of the relay is controlled, because all the capacitors are connected with the relay in series, the capacitors are connected with the total output port in parallel, thereby controlling the on-off of the corresponding capacitors of the capacitor array, and outputting the capacitance value required by the automation equipment.
Drawings
FIG. 1 is a schematic diagram of a programmable capacitive device based on a capacitive array;
FIG. 2 is a circuit diagram of a capacitor switch matrix;
FIG. 3 illustrates a capacitive switch matrix control principle;
FIG. 4 is a capacitance measurement feedback circuit;
FIG. 5 is a software design flow chart.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Example 1:
as shown in fig. 1 to 5, the present embodiment provides a programmable capacitor device based on a capacitor array, which includes an upper computer and a control system; the control system comprises a controller and a control circuit; the control circuit comprises a capacitor array output circuit; the upper computer is used for sending out an output capacitance instruction and outputting a capacitance; the control system receives an output capacitance instruction sent by the upper computer, inputs a capacitor and converts the input capacitor into a capacitor array to be output through a capacitor array output circuit, wherein the capacitor array is a plurality of paths of digital quantity capacitor signals connected in parallel; each path of digital capacitance signal of the capacitor array is controlled by a switch; the control system is also used for sending a switch instruction to the capacitor array, and the controller controls the capacitor output value of the capacitor array through the switch control of each path of digital quantity capacitor signal.
The control system is a hardware design part of the program-controlled capacitor plate and mainly comprises an MCU control system (an MCU circuit, a power supply conversion circuit, a serial port downloading circuit and a serial port communication circuit). The MCU control system mainly comprises an MCU circuit, a power supply conversion circuit, a serial port downloading circuit and a serial port communication circuit. The MCU circuit comprises an MCU (STM 32F767IGT6 from ST company), an MCU reset circuit and an MCU start configuration circuit. The power conversion circuit comprises an MP2359, an AMS1117-3.3 voltage stabilizing chip and additional circuits thereof for outputting 5V and 3.3V voltages. The chip used by the serial port download circuit is CH 340G. The serial communication circuit adopts SP3485 as a transceiver. The MCU (MCU) receives a capacitance output instruction of the upper computer software through the serial port RS485, and the output instruction is displayed by the display control panelAfter the indication and coding, the indication and coding are forwarded to the corresponding MCU through a serial port RS485, after the MCU receives a capacitance value instruction transmitted by the upper computer, the input capacitance is firstly compared with a 400pF capacitance value, if the input capacitance value is larger than 400pF, the TF value of the 400pF output module is set to be true, and the residual required capacitance is transferred to a 300pF capacitance control program as an input capacitance-400 pF, if the input capacitance value is smaller than 400pF, the TF value of the 400pF output module is set to be false, and the residual required capacitance is transferred to an input capacitance control program as an input capacitance, and the residual required capacitance is transferred to the 300pF capacitance control program; then, the "residual required capacitance" is compared with a capacitance value of 300pF, which is similar to a capacitance control program of 400pF, and an output result is transmitted to the residual capacitance control program, and finally, an input analog capacitance value is converted into a multi-path digital output to be transmitted to a circuit shown in fig. 2, a digital quantity signal in fig. 2 is converted into a switch output of a direct current 12V voltage through an optical coupling switch chip, and further the on-off of a relay is controlled, as shown in fig. 2, all the capacitors are connected in series with the relay and then are connected to ports C1in and C1out in parallel, and a parallel capacitance value calculation formula C ═ Σ C is used to calculate the capacitance valueXTherefore, when the relay is connected, the capacitance value of the path is superposed in the output value of the total capacitor, and when the relay is disconnected, the capacitance value of the path is 0, so that the connection and disconnection of the corresponding capacitor of the capacitor array are controlled.
The array capacitor has four combinations, namely a decimal place 0.1+0.2+0.3+0.4 parallel combination, a decimal place 1+2+3+4 parallel combination, a decimal place 10+20+30+40 parallel combination and a hundreds place 100+200+300+400 parallel combination, and can realize accurate conversion of different capacitance values.
Referring to fig. 2 and fig. 3, taking two of them as an example, two control outputs of the capacitors in the array capacitor are shown, namely software and hardware control schematic diagrams of 200pF and 100pF, and control output circuits of other capacitance values, and so on. As shown in fig. 3, the input capacitance is first compared with a 200pF capacitance value, if the input capacitance value is greater than 200pF, the TF value of the 200pF output module is set to true and "remaining required capacitance" ═ input capacitance "-200 pF is passed to the 100pF capacitance control program, if the input capacitance value is less than 200pF, the TF value of the 200pF output module is set to false and" remaining required capacitance "═ input capacitance" is passed to the 100pF capacitance control program; then, the "residual required capacitance" is compared with a capacitance value of 100pF, similarly to a capacitance control program of 200pF, and an output result is transmitted to the residual capacitance control program, and finally, the input analog capacitance value is converted into a multi-path digital output.
For example, the input capacitance value is 1100.5pF, according to the capacitance array conversion method of the present invention, the output digital capacitance values are 400pF, 300pF, 200pF, 100pF, 40pF, 30pF, 20pF, 10pF, 0.4pF, 0.1pF in sequence, and 1 channel is converted into 10 channels.
FIG. 4 is a schematic diagram of a capacitance measuring part, and the chip is a capacitance measuring chip
The PCPpp 1 chip is connected in a drift mode, and can be connected with 3 sensors and a reference capacitor at most, wherein C0 is the reference capacitor, the rest is the capacitor to be measured, C1in and C1out are connected, namely, the capacitor array is connected in parallel to form a total output port, the capacitor measuring module feeds back the output capacitance value to the MCU through an SPI bus after measurement settlement, and the MCU compares the output capacitor with the measured capacitor to finally obtain accurate capacitor output.
The bottom layer embedded software of the programmable capacitor device based on the capacitor array is compiled based on C language, and the initialized module comprises a clock, a serial port, an IO port and SPI capacitance measurement feedback, and belongs to the conventional design, and is not in the protection scope of the invention, and the details are not repeated.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
In addition, the power conversion module, the serial port download module, the serial port communication module, the reset circuit and the start configuration circuit are only limited in performance, and the implementation of specific functions of the modules or circuits is a conventional technical means in the field, and the details of the invention are not repeated herein.
Claims (8)
1. A program-controlled capacitor device based on a capacitor array comprises an upper computer and a control system; the control system is characterized in that a capacitor array output circuit and a switch control circuit are integrated in the control system; the capacitor array output circuit is used for converting one path of capacitor signals into a plurality of paths of digital quantity capacitor signals which are connected in parallel, and the plurality of paths of digital quantity capacitor signals which are connected in parallel are capacitor arrays; the switch control circuit is used for controlling the capacitor array;
the upper computer is used for sending out an output capacitance instruction and outputting a capacitance;
the control system receives an output capacitance instruction sent by the upper computer, inputs a capacitor and converts the input capacitor into a capacitor array output through a capacitor array output circuit;
the control system is also used for sending a switching instruction to the switching control circuit, and the switching control circuit adjusts the capacitance value of the program-controlled capacitance device through the switching control of each path of digital capacitance signal.
2. The programmable capacitor device based on capacitive array of claim 1 wherein the control system further comprises a power conversion module, a serial download module and a serial communication module;
the power supply conversion module comprises a voltage reduction conversion module and a voltage stabilization module and is used for outputting 5V and 3.3V voltages;
the serial port downloading module is used for downloading the output capacitance value of the upper computer;
the serial port communication module is used for receiving an output capacitance instruction sent by the upper computer and sending a capacitance array switch instruction.
3. The programmable capacitor apparatus based on capacitive array as claimed in claim 1, wherein the control system further comprises a reset circuit and a start configuration circuit;
the reset circuit is used for resetting the control system;
the starting configuration circuit is used for ensuring the normal starting of the control system.
4. The capacitor array-based programmable capacitor device according to claim 1, wherein the capacitor array is sixteen parallel digital capacitive signals, each having a capacitor control module and the capacitance value of each four capacitive signals is an order of magnitude, which is formed by four orders of magnitude of decimal, decimal and hundreds, and the capacitive signals of the same order of magnitude are combined in parallel to ensure the accuracy of the capacitor output value of the capacitor array.
5. The capacitor array-based program controlled capacitor device of claim 4, wherein the decimal place is a parallel combination of capacitance values of 0.1pF, 0.2pF, 0.3pF, and 0.4pF, the decimal place is a parallel combination of capacitance values of 1pF, 2pF, 3pF, and 4pF, the decimal place is a parallel combination of capacitance values of 10pF, 20pF, 30pF, and 40pF, and the hundreds place is a parallel combination of capacitance values of 100pF, 200pF, 300pF, and 400 pF.
6. The programmable capacitor apparatus based on capacitive array of claim 5, wherein the control method of the output circuit of the capacitive array comprises the steps of:
step 1, firstly comparing an input capacitor with 400pF, if the input capacitor is larger than 400pF, transmitting a residual required capacitor, namely input capacitor-400 pF, to a 300pF capacitor control module by a 400pF capacitor control module, and simultaneously outputting a 400pF capacitor value by the 400pF capacitor control module; if the capacitance is less than 400pF, the 400pF capacitance control module transmits the residual required capacitance which is the input capacitance to a 300pF capacitance control program;
step 2, continuously comparing the residual required capacitance with 300pF, if the residual required capacitance is greater than 300pF, transmitting the residual required capacitance, namely input capacitance-300 pF, to the 200pF capacitance control module by the 300pF capacitance control module, and simultaneously outputting a 300pF capacitance value by the 300pF capacitance control module; if the capacitance is less than 300pF, the 300pF capacitance control module transmits the residual required capacitance which is the input capacitance to a 200pF capacitance control program;
and continuously comparing the residual required capacitance with hundreds digit, tens digit, digit and decimal digit according to the control method until the input capacitance is converted into a multipath digital quantity capacitance signal.
7. The programmable capacitor device based on a capacitive array of claim 1, wherein the capacitive array is controlled by a switch control circuit, in particular: the switch control circuit comprises a multi-way switch control sub-circuit, the sub-circuit comprises an optical coupling switch chip, a relay and a capacitor, the relay and the capacitor are connected in series, the sub-circuit corresponds to each digital capacitance signal of the capacitor array one by one, each digital capacitance signal of the capacitor array is converted into a switch output of a direct current 12V voltage through the optical coupling switch chip, and then the on-off of the switch is controlled through the relay, and all the capacitors are connected in series with the relay respectively and then are connected in parallel at a total output port.
8. The programmable capacitor device according to claim 1, further comprising a capacitance measurement module for measuring a capacitance output value of the capacitor array and feeding back the measured value to the control system, wherein the control system compares the output capacitance with the measured value, and if the output capacitance is not equal to the measured value, adjusts the output capacitance or the capacitor array until the output capacitance is equal to the measured value; and the capacitance measuring module is respectively connected to the output ends of the capacitor array output circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790695.0A CN110658746A (en) | 2019-08-26 | 2019-08-26 | Program-controlled capacitor device based on capacitor array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790695.0A CN110658746A (en) | 2019-08-26 | 2019-08-26 | Program-controlled capacitor device based on capacitor array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110658746A true CN110658746A (en) | 2020-01-07 |
Family
ID=69036406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910790695.0A Pending CN110658746A (en) | 2019-08-26 | 2019-08-26 | Program-controlled capacitor device based on capacitor array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110658746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649763A (en) * | 2020-12-30 | 2021-04-13 | 四川泛华航空仪表电器有限公司 | High-precision arbitrary value capacitor output device and output method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776713A (en) * | 2009-01-13 | 2010-07-14 | 纬拓科技股份有限公司 | Direct capacitance-digital converter |
| CN101854174A (en) * | 2010-05-18 | 2010-10-06 | 上海萌芯电子科技有限公司 | Streamline analog-digital converter and sub conversion stage circuit thereof |
| CN102480293A (en) * | 2010-11-25 | 2012-05-30 | 盛群半导体股份有限公司 | Analogue-digital converting device |
| CN205121309U (en) * | 2015-11-09 | 2016-03-30 | 昆山龙腾光电有限公司 | Numerical control electric capacity device |
| US20190190313A1 (en) * | 2017-12-20 | 2019-06-20 | Craig Sean Dean | Multi-controllable high voltage power supply system |
| CN209148019U (en) * | 2018-10-31 | 2019-07-23 | 四川泛华航空仪表电器有限公司 | A kind of capacitance type sensor simulator |
-
2019
- 2019-08-26 CN CN201910790695.0A patent/CN110658746A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776713A (en) * | 2009-01-13 | 2010-07-14 | 纬拓科技股份有限公司 | Direct capacitance-digital converter |
| CN101854174A (en) * | 2010-05-18 | 2010-10-06 | 上海萌芯电子科技有限公司 | Streamline analog-digital converter and sub conversion stage circuit thereof |
| CN102480293A (en) * | 2010-11-25 | 2012-05-30 | 盛群半导体股份有限公司 | Analogue-digital converting device |
| CN205121309U (en) * | 2015-11-09 | 2016-03-30 | 昆山龙腾光电有限公司 | Numerical control electric capacity device |
| US20190190313A1 (en) * | 2017-12-20 | 2019-06-20 | Craig Sean Dean | Multi-controllable high voltage power supply system |
| CN209148019U (en) * | 2018-10-31 | 2019-07-23 | 四川泛华航空仪表电器有限公司 | A kind of capacitance type sensor simulator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649763A (en) * | 2020-12-30 | 2021-04-13 | 四川泛华航空仪表电器有限公司 | High-precision arbitrary value capacitor output device and output method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2501099C2 (en) | Data collection card, system and method of managing data collection card expansion | |
| US9402027B2 (en) | Power supplying method and apparatus | |
| CN103608795B (en) | dynamically reconfigurable electrical interface | |
| CN111142008B (en) | Circuit board power parameter testing system and method | |
| CN106969674B (en) | A kind of generalization ground checkout equipment based on PLC module | |
| CN112344810B (en) | Missile weapon test equipment | |
| CN105070264A (en) | Common voltage adjustment system and method of liquid crystal display panel | |
| CN104680997A (en) | VCOM compensation circuit and display device | |
| CN110658746A (en) | Program-controlled capacitor device based on capacitor array | |
| US20100308752A1 (en) | Power distribution system | |
| CN107202968B (en) | It is a kind of for the multichannel shim current source of magnetic resonance imaging and its operation method | |
| CN108873786A (en) | Data collection system based on digital quantity conditioning | |
| CN116192716B (en) | ZYNQ-based avionics multi-protocol bus test platform | |
| CN105791812A (en) | Digital television transmitter broadband detection implementation system and method | |
| CN101603838A (en) | Intelligent transducer and scaling method thereof | |
| CN207502856U (en) | LCTF controllers | |
| CN203965551U (en) | A kind of multichannel transmitters sense device | |
| CN107656572B (en) | Multi-path adjustable voltage source realized by digital-to-analog converter and control method thereof | |
| US20150339252A1 (en) | Embedded Extensible Instrumentation Bus | |
| CN110955628B (en) | Analog quantity telemetering acquisition method and acquisition system based on sampling address | |
| CN206193181U (en) | Accuse device circuit board detection diagnosis equipment is sent out to guided missile | |
| CN211124351U (en) | Multifunctional data acquisition unit based on simulation and digital acquisition | |
| CN211478501U (en) | Multifunctional device for wireless charging test and development | |
| CN109855746B (en) | Temperature value transmission device and method thereof | |
| CN113485183A (en) | Serial signal acquisition output control device based on PCI bus protocol |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200107 |