CN201011504Y - Current sensor - Google Patents
Current sensor Download PDFInfo
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- CN201011504Y CN201011504Y CNU2006200482240U CN200620048224U CN201011504Y CN 201011504 Y CN201011504 Y CN 201011504Y CN U2006200482240 U CNU2006200482240 U CN U2006200482240U CN 200620048224 U CN200620048224 U CN 200620048224U CN 201011504 Y CN201011504 Y CN 201011504Y
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Abstract
A current transducer comprises a signal input and detection unit, a display screen and a dater processing unit which is connected with the signal input and detection unit and the display screen respectively; wherein, the signal input and detection unit includes a detection controller with multiway connector, a transform circuit of current and voltage, a signal conditioning circuit and a multicore terminal; the data processing unit comprises: a data processing controller, an analog photocoupler, a memorizer, an I<2>C assemble and a USB interface and a power module which supplies power to the transducer; the analog photocoupler, the memorizer, the I<2> C assemble and the USE interface are connected with the data processing controller respectively. The detection controller is used for detecting the hot-plugging of the transducer, identify the transducer, automatically check the transducer, carry out the data communication and order exchange with the data processing controller. The detection controller can control the transducer to detect and debug online.
Description
Technical field
The utility model relates to a kind of current sensor of measuring air pressure.
Background technology
Sensor is the feeler that the mankind find out nature information, and the various non electrical quantity information that it can need be found out people change into the information about power that can survey, is the first road threshold of infosystem, provides condition and foundation for people are familiar with and control corresponding object.Sensor technology has more and more important effect in modern society, has developed into one of modern information technologies three big core technologies now.
Traditional sensor (or claiming common sensor) is analog meter instrument or analog computer product of the time.Its design phiolosophy is that external information is transformed into aanalogvoltage or current signal.The problem that it exists is that output amplitude is less, and sensitivity is lower, and function singleness, thereby is called " deaf and dumb sensor " by people.
It is of a great variety that configuration information obtains the sensor (common sensor) in source, specifically comprise photosensitive, temperature-sensitive, power is quick, voltage is quick, magnetosensitive, air-sensitive, wet quick, sound is quick, ray is quick, ion is quick, biology is quick etc., its principle has nothing in common with each other, but no matter be the sensor that adopts which kind of principle, all need measured signal is converted to electric quantity signals such as resistance, inductance, electric capacity at last, because the variation of R, L, C, caused the variation that detects electric current or detect voltage, these analog electrical signals have become the receptible digital signal of computing machine after sampling and A/D conversion.
Along with the progress in epoch, traditional sensor can not satisfy the demand of modern industrial and agricultural production even war.Need to improve its measuring accuracy.
Summary of the invention
The purpose of this utility model provides a kind of intelligent current sensor that can improve measuring accuracy that possesses data processing, self check, self-correcting, self compensation ability.
2. the technical measures taked of the utility model are: it is comprised: signal input detection unit, display screen, the data processing unit that is connected with display screen with the signal input detection unit respectively;
Comprise in the described signal input detection unit: the detection controller that has the multiway interface, current-voltage conversion circuit, the signal conditioning circuit that is connected with the current-voltage conversion circuit output terminal, respectively with signal conditioning circuit with detect the multicore terminal that controller is connected;
Comprise in the described data processing unit: data processing controller, the analog photoelectricity coupling mechanism, storer, the I that are connected with data processing controller respectively
2C bus and USB interface place the power module of supplying probe power on the data processing unit.
Described current-voltage conversion circuit is (common) current sensor commonly used that current signal is converted to voltage signal.
As above-mentioned structure of the present utility model, after sensor starting, current-voltage conversion circuit obtains current signal from tested current source, and its current signal is converted to voltage signal is input in the signal conditioning circuit; Signal conditioning circuit with its magnitude of voltage be converted to treatable magnitude of voltage and be converted to unified voltage signal according to the standard value of defined, i.e. normalization, general-25V～25V is normalized to 0～5V usually; Pass through multicore terminal and the I on data processing unit through the voltage signal after the normalization
2The C bus enters in the data processing controller; Data processing controller at first converts the voltage analog signal that receives to digital signal, compare then and calculate pairing measured value, again that it is corresponding measured value demonstrates by display screen, and deposits that store memory stores up in and export by USB interface.Place the detection controller in the signal input detection unit to have multiway interface (as jtag interface), storage inside has the various information of sensor, as the identify label of sensor, standard signal value, identification code etc., after the sensor starting, it can online detection and on-line debugging by the multiway interface, and its is responsible for carrying out with the data processing controller on data processing unit the exchange of data communication and instruction; It finishes the detection of sensor hot plug, the identification of sensor identity and self-checking function, and the operation conditions of detecting sensor and adjustment sensor are at optimal operational condition.It is equivalent to the control center of integral sensors, and can liken is that one " brain " has been installed on the sensor of a tradition (common).Be connected in analog photoelectricity coupling mechanism on the data processing controller and can isolate out interference from the simulating signal on the power module.Measuring accuracy as the utility model current sensor of above-mentioned structure can improve at least 10% (generally being more than 10%) than the measuring accuracy of above-mentioned traditional sensors.
Description of drawings
Fig. 1 is the structural representation of the utility model current sensor.
Embodiment
Further specify architectural feature of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model current sensor comprises: signal input detection unit 1, display screen 2, the data processing unit 3 that is connected with display screen 2 with signal input detection unit 1 respectively;
Comprise in the described signal input detection unit 1: the detection controller 11 that has multiway interface 12, input end is connected to the current-voltage conversion circuit 15 on the tested current source 4, the signal conditioning circuit 14 that is connected with current-voltage conversion circuit 15 output terminals, respectively with signal conditioning circuit 14 with detect the multicore terminal 13 that controller 11 is connected;
Comprise in the described data processing unit 3: data processing controller 31, the analog photoelectricity coupling mechanism 34 that is connected with data processing controller 31, storer 35, I respectively
2C bus 36 and USB interface 37 place the power module 32,33 of supplying probe power on the data processing unit 3.
In the present embodiment, as shown in Figure 1, the power supply of supply sensor has two power modules 32,33.One of them power module 33 uses for specializing in data processing controller 31.
In the present embodiment, it is described that to place the detection controller 11 in the signal input detection unit 1 and place the data processing controllers 31 in the data processing unit 3 all be to have various ports, as ports such as 12C, SPI, UART, PCA and as the multiway interface of jtag interface, embedded A/D converter (D/A sensor) and D/A converter (D/A), contain mixed signal SOC, the C805 1F Series chip chip of Silicon Laboratories.This chip power-consumption is smaller, by the jtag interface of multiway, makes sensor can realize online detection and on-line debugging; This chip has high-frequency clock, can effectively improve the reaction velocity of system.Contain the identity information of sensor at this chip internal memory, self check information, and check code etc.
In the present embodiment, described multicore terminal 13 adopts 10 core S terminals, it is the attachment plug that connects signal input detection unit 1 and data processing unit 3, and what be attached thereto is 10 core shielded cables, and it is transferred to the various signals of signal input detection unit 1 in the data processing unit 3.
In the present embodiment, described current-voltage conversion circuit is that the resistance string by little resistance (0.1 Ω) is connected in the circuit of tested current source 4, with tested electric current shunting and according to desired standard handovers is that unified voltage signal is input in the signal conditioning circuit, and signal conditioning circuit is that the magnitude of voltage that will obtain from current-voltage conversion circuit is normalized into 0V～5V; In the present embodiment, current sensor of the present utility model is to be converted to the output of 0V voltage at the pairing magnitude of voltage of electric current-2.5A, the pairing magnitude of voltage of electric current 2.5A is converted to the output of 5V voltage.
Described analog photoelectricity coupling mechanism 34 adopts HCNR200 analog photoelectricity coupling mechanism, and the interference of isolation mode analog signal fully prevents the impact of the simulating signal of power module to controller.
Claims (4)
1. current sensor is characterized in that comprising: signal input detection unit, display screen, the data processing unit that is connected with display screen with the signal input detection unit respectively;
Comprise in the described signal input detection unit: the detection controller that has the multiway interface, current-voltage conversion circuit, the signal conditioning circuit that is connected with the current-voltage conversion circuit output terminal, respectively with signal conditioning circuit with detect the multicore terminal that controller is connected;
Comprise in the described data processing unit: data processing controller, the analog photoelectricity coupling mechanism, storer, the I that are connected with data processing controller respectively
2C bus and USB interface place the power module of supplying probe power on the data processing unit.
2. current sensor according to claim 1 is characterized in that placing the detection controller in the signal input detection unit is the singlechip chip that contains mixed signal that has the embedded A/D converter of various ports.
3. current sensor according to claim 1 is characterized in that placing the data processing controller in the data processing unit is the singlechip chip that contains mixed signal that has the embedded A/D converter of various ports.
4. current sensor according to claim 1 is characterized in that placing two power modules are arranged on the data processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200482240U CN201011504Y (en) | 2006-11-28 | 2006-11-28 | Current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200482240U CN201011504Y (en) | 2006-11-28 | 2006-11-28 | Current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201011504Y true CN201011504Y (en) | 2008-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200482240U Expired - Fee Related CN201011504Y (en) | 2006-11-28 | 2006-11-28 | Current sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201011504Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561458B (en) * | 2009-05-26 | 2012-01-11 | 刘海先 | Method and device for measuring current on line |
| CN102759657A (en) * | 2011-04-28 | 2012-10-31 | 上海西门子线路保护系统有限公司 | System and method for detecting coupling current |
| CN104781680A (en) * | 2012-09-24 | 2015-07-15 | Abb技术股份公司 | Current and/or voltage sensor device, and method of operation same |
| US9250299B1 (en) | 2009-08-28 | 2016-02-02 | Cypress Semiconductor Corporation | Universal industrial analog input interface |
| CN110097683A (en) * | 2018-07-20 | 2019-08-06 | 深圳怡化电脑股份有限公司 | A kind of equipment self-inspection method, apparatus, ATM and storage medium |
-
2006
- 2006-11-28 CN CNU2006200482240U patent/CN201011504Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561458B (en) * | 2009-05-26 | 2012-01-11 | 刘海先 | Method and device for measuring current on line |
| US9250299B1 (en) | 2009-08-28 | 2016-02-02 | Cypress Semiconductor Corporation | Universal industrial analog input interface |
| CN102759657A (en) * | 2011-04-28 | 2012-10-31 | 上海西门子线路保护系统有限公司 | System and method for detecting coupling current |
| CN104781680A (en) * | 2012-09-24 | 2015-07-15 | Abb技术股份公司 | Current and/or voltage sensor device, and method of operation same |
| CN104781680B (en) * | 2012-09-24 | 2018-03-02 | Abb技术股份公司 | Electric current and/or voltage sensing device and the method for the operation electric current and/or voltage sensing device |
| US10161972B2 (en) | 2012-09-24 | 2018-12-25 | Abb Schweiz Ag | Current and/or voltage sensor device with a memory element |
| CN110097683A (en) * | 2018-07-20 | 2019-08-06 | 深圳怡化电脑股份有限公司 | A kind of equipment self-inspection method, apparatus, ATM and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20091228 |