CN104062490A - Current and temperature measuring sensor - Google Patents
Current and temperature measuring sensor Download PDFInfo
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- CN104062490A CN104062490A CN201410337882.0A CN201410337882A CN104062490A CN 104062490 A CN104062490 A CN 104062490A CN 201410337882 A CN201410337882 A CN 201410337882A CN 104062490 A CN104062490 A CN 104062490A
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Abstract
A current and temperature measuring sensor is composed of a device box, a power module, an MCU module, a current transformer module, a thermistor module and a data transmission interface module. The power module, the MCU module and the current transformer module are arranged in the device box; the thermistor module is arranged on one side of an inner ring of the device box; the data transmission interface module is installed on a front face panel of the device box, all the modules are connected through signal interfaces on the MCU module, and the power module obtains electricity through electromagnetic induction and supplies power required by operation of the MCU module; the current transformer module and the thermistor module transmit sensed analog signals to the MCU module so that the sensed analog signals can be post-processed; data information obtained after final processing is converted into optical signals by the MCU module and transmitted out through the data transmission interface module.
Description
Technical field:
The present invention relates to a kind of electric current and sensor for measuring temperature, it,, for measuring alternating current of all sizes and cable temperature, belongs to sensor information technical field.
Background technology:
Conventional AC current measurement extensively adopts the AC current transformer of ribbon core, its saturation response current field of iron core in the time of Super-Current Measurement can bring very large measuring error, so the D.C mutual-inductor on market has limit of range, must in the measurement range of current of nominal, use, otherwise can not ensure measuring accuracy and accuracy.In the time of routine metering and overcurrent protection, need use different current transformers, its volume is large, cost is high, increase with the increase of current capacity, and electromagnetic induction further increases current transformer volume unshakable in one's determination, cost sharp increase.
Summary of the invention:
1) object: the object of this invention is to provide a kind of electric current and sensor for measuring temperature, it has overcome the deficiencies in the prior art is a kind of iron-core-frees, good linearity, unsaturated, cost is low, volume is little, easy for installation and highly sensitive electric current and sensor for measuring temperature.
2) technical scheme: the present invention is a kind of electric current and sensor for measuring temperature, it by device case, power module, MCU module, current transformer module, thermistor module, data transmission interface module etc. totally 6 parts form.Position annexation between them is: power module, MCU module summation current transformer module are placed in device case; Thermistor module is placed in interior ring one side of device case; Data transmission interface module is arranged on the front panel of device case.Modules is connected by the signaling interface in MCU module each other.Its signal moves towards relation: power module passes through electromagnetic induction power taking, and supplies with MCU module and move required power supply; Current transformer module and thermistor module are delivered to MCU module by the simulating signal of institute's perception and carry out subsequent treatment; MCU module is converted to light signal by the data message of finally processing gained and transfers out by data transmission interface module.
Described device case is to be made by SMC compound substance.Formed by bolt combination with interior empty semi-circular strip plastic body and a fastening cable of holding screw by empty rectangular plastic box, two both sides in one.Inner hardware circuit part and the MCU module for placing power module of the rectangular plastic box of interior sky, also has 2 connection terminals for optical fiber communication on its front panel, the data communication interface above connection terminal final sum MCU module is connected; Two semi-circular strip plastic bodies are used for placing current transformer module and electromagnetic induction coil; One of them semi-circular strip plastic body annular inner portion also has a groove that is used for placing thermistor; Two semi-circular strip plastic bodies are combined into a positive round plastic list structure by the fixed screw on its both sides.
Described power module is to power for the operation of whole device.Formed by electromagnetic induction coil and rectification filtering voltage stabilizing circuit two parts.Electromagnetic induction coil is placed in positive circular strip plastic body; Rectification filtering voltage stabilizing circuit part is placed in the rectangular plastic box of interior sky, and the electric energy that this part obtains electromagnetic induction coil obtains the stabilized power source output of 3.3V after processing by rectifying and wave-filtering voltage stabilizing, be delivered to MCU module; Two parts are connected to each other by wire.This rectification filtering voltage stabilizing circuit is made up of commutation diode, RC filtering circuit and integrated stable voltage circuit, and the alternating current that commutation diode changes size and Orientation becomes direct current; RC filtering circuit filters the harmonic voltage becoming after direct current; Integrated stable voltage circuit is transformed into galvanic current by unsettled DC voltage and presses output.
Described current transformer module is that Luo-coil (Rogowski Coil, full name Rogowski coil, because Luo-coil is not containing iron core, also claim air core coil) is made.It has feature that can be unsaturated, and is linear output, precision and the accuracy that can in the time of curent change on a large scale, ensure to measure electric current.
Described MCU module is 16 MSP430AFE253 single-chip microcomputers with inner ADC function.This MCU is powerful: support 3 tunnel 24 potential differences to divide input analog port; With inner PGA, maximum gain 32; There is the reference voltage of inner high stability and Low Drift Temperature; With internal multiplier; There are nearly 21 IO mouths; There is hardware USART communication interface; Super low-power consumption, standby mode can reach 0.1uA etc.
Described thermistor module is PX-42H NTC negative tempperature coefficient thermistor, and this thermistor has the features such as precision is high, reaction velocity is fast, measurement range is wide.
Described data transmission interface module is fibre optic data transmission access interface, and its interface is distributed in the front panel of hollow rectangular parallelepiped side by side, optical fiber can be accessed to sensor by special connection terminal.Sensor can send data to liquid crystal panel by this interface and optical fiber and show, or is sent to communication equipment and the operation such as stores, upload.
The principle of the invention and workflow brief introduction are as follows:
The electric current that the electromagnetic induction coil of power module is obtained is the basis of the normal work of whole device.Current transformer module and thermistor module are sent to the simulating signal of perception the input interface of MCU module; MCU module converts thereof into and is applicable to the voltage signal that ADC processes; Convert thereof into by the ADC module being integrated in MCU module the digital signal that MCU module can directly be processed again; MCU module is reduced into cable current value and temperature value through calculating; MCU module becomes light signal to send by data transmission interface module the data-switching of reflection cable real current value and temperature value.
3) advantage of the present invention and effect are:
1, current transformer adopts screw loop construction, iron-core-free, good linearity, unsaturated, highly sensitive.
2, installation cost is low, low in energy consumption, volume is little, easy for installation.
3, integrate temperature and current measurement, take up room little.
4, adopt optical fiber communication mode to avoid because of the impact of the factor such as humiture, magnetic field, data security is reliable.
5, current range can be measured large: in 0-10000A, multiple alternating current all can use.
6, current sample accuracy is high: 0.5 grade (particular/special requirement can be accomplished 0.1 grade);
7, the excessive interchange input current of short-term applies 2000% of nominal value, and the duration is less than 1S, and system works is normal;
8,10 times of rated current measuring error <3%;
Brief description of the drawings
Fig. 1 is function composition block diagram of the present invention
Embodiment
As shown in Figure 1, a kind of electric current of the present invention and sensor for measuring temperature, it by device case, power module, MCU module, current transformer module, thermistor module, data transmission interface module etc. totally 6 parts form.Position annexation between them is: power module, MCU module summation current transformer module are placed in device case; Thermistor module is placed in interior ring one side of device case; Data transmission interface module is on the front panel of device case.Modules is connected by the signaling interface in MCU module each other.Its signal moves towards relation: power module passes through electromagnetic induction power taking, and supplies with MCU module and move required power supply; Current transformer module and thermistor module are delivered to MCU module by the simulating signal of institute's perception and carry out subsequent treatment; MCU module is converted to photosignal by the data message of finally processing gained and transfers out by data transmission interface module.
Described device case is to be made by SMC compound substance.Combined with empty rectangular parallelepiped plastic box in the interior empty semi-circular plastic body of screw retaining thread and by two both sides.Inner hardware circuit part and the MCU module for placing power module of interior empty rectangular parallelepiped plastic box, also has 2 connection terminals for optical fiber communication on its front panel, the data communication interface above connection terminal final sum MCU module is connected; Two semiorbicular plastic bodies are used for placing current transformer module; Semi-circular plastic body annular inner portion wherein also has a groove that is used for placing thermistor module; Two semi-circular plastic bodies are combined into a positive round plastic list structure body by the retaining thread on its both sides.
Described power module is to power for the operation of whole device.Formed by electromagnetic induction coil and rectification filtering voltage stabilizing circuit two parts.Electromagnetic induction coil is placed in positive circular strip plastic body; Rectification filtering voltage stabilizing circuit part is placed in the rectangular plastic box of interior sky, and the electric energy that this part obtains electromagnetic induction coil obtains the stabilized power source output of 3.3V after processing by rectifying and wave-filtering voltage stabilizing, be delivered to MCU module; Two parts are connected to each other by wire.This rectification filtering voltage stabilizing circuit is made up of commutation diode, RC filtering circuit and integrated stable voltage circuit, and the alternating current that commutation diode changes size and Orientation becomes direct current; RC filtering circuit filters the harmonic voltage becoming after direct current; Integrated stable voltage circuit is transformed into galvanic current by unsettled DC voltage and presses output.
Described current transformer is that Luo-coil (Rogowski Coil, full name Rogowski coil, because Luo-coil is not containing iron core, also claim air core coil) is made.It has feature that can be unsaturated, and is linear output, precision and the accuracy that can in the time of curent change on a large scale, ensure to measure electric current.
Described MCU module is 16 MSP430AFE253 single-chip microcomputers with inner ADC function.This MCU is powerful: support 3 tunnel 24 potential differences to divide input analog port; With inner PGA, maximum gain 32; There is the reference voltage of inner high stability and Low Drift Temperature; With internal multiplier; There are nearly 21 IO mouths; There is hardware USART communication interface; Super low-power consumption, standby mode can reach 0.1uA etc.
Described thermistor module is PX-42H NTC negative tempperature coefficient thermistor, and this thermistor has the features such as precision is high, reaction velocity is fast, measurement range is wide.
Described data transmission interface module is fibre optic data transmission interface, and its interface is distributed in the front panel of hollow rectangular parallelepiped side by side, optical fiber can be accessed to sensor by special connection terminal.Sensor also can send data to liquid crystal panel by this interface and optical fiber and show, or is sent to communication equipment and the operation such as stores.
Claims (1)
1. electric current and a sensor for measuring temperature, is characterized in that: it by device case, power module, MCU module, current transformer module, thermistor module and data transmission interface module totally 6 parts form; Power module, MCU module summation current transformer module are placed in device case; Thermistor module is placed in interior ring one side of device case; Data transmission interface module is arranged on the front panel of device case, and modules is connected by the signaling interface in MCU module each other, and power module passes through electromagnetic induction power taking, and supplies with MCU module and move required power supply; Current transformer module and thermistor module are delivered to MCU module by the simulating signal of institute's perception and carry out subsequent treatment; MCU module is converted to light signal by the data message of finally processing gained and transfers out by data transmission interface module;
Described device case is to be made by SMC compound substance, is formed with interior empty semi-circular strip plastic body and a fastening cable of holding screw by empty rectangular plastic box, two both sides in one by bolt combination; Inner hardware circuit part and the MCU module for placing power module of the rectangular plastic box of interior sky, also has 2 connection terminals for optical fiber communication on its front panel, the data communication interface above connection terminal final sum MCU module is connected; Two semi-circular strip plastic bodies are used for placing current transformer module and electromagnetic induction coil; One of them semi-circular strip plastic body annular inner portion also has a groove that is used for placing thermistor; Two semi-circular strip plastic bodies are combined into a positive round plastic list structure by the fixed screw on its both sides;
Described power module is to power for the operation of whole device, is made up of electromagnetic induction coil and rectification filtering voltage stabilizing circuit two parts; Electromagnetic induction coil is placed in positive circular strip plastic body; Rectification filtering voltage stabilizing circuit part is placed in the rectangular plastic box of interior sky, and the electric energy that this part obtains electromagnetic induction coil obtains the stabilized power source output of 3.3V after processing by rectifying and wave-filtering voltage stabilizing, be delivered to MCU module; Two parts are connected to each other by wire; This rectification filtering voltage stabilizing circuit is made up of commutation diode, RC filtering circuit and integrated stable voltage circuit, and the alternating current that commutation diode changes size and Orientation becomes direct current; RC filtering circuit filters the harmonic voltage becoming after direct current; Integrated stable voltage circuit is transformed into galvanic current by unsettled DC voltage and presses output;
Described current transformer module is that Luo-coil is made; It has feature that can be unsaturated, and is linear output, precision and the accuracy that can in the time of curent change on a large scale, ensure to measure electric current;
Described MCU module is 16 single-chip microcomputers with inner ADC function; Support 3 tunnel 24 potential differences to divide input analog port, with inner PGA, there is the reference voltage of inner high stability and Low Drift Temperature; With internal multiplier; Have and reach 21 IO mouths and there is hardware USART communication interface;
Described thermistor module is negative tempperature coefficient thermistor, has that precision is high, reaction velocity is fast, the wide feature of measurement range;
Described data transmission interface module is fibre optic data transmission access interface, and its interface is distributed in the front panel of hollow rectangular parallelepiped side by side, by special connection terminal, optical fiber is accessed to sensor; Sensor sends data to liquid crystal panel by this interface and optical fiber and shows, or is sent to that communication equipment is stored, upload operation.
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| CN201410337882.0A CN104062490A (en) | 2014-07-16 | 2014-07-16 | Current and temperature measuring sensor |
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| CN201410337882.0A CN104062490A (en) | 2014-07-16 | 2014-07-16 | Current and temperature measuring sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627738A (en) * | 2017-03-16 | 2018-10-09 | 宝钢特钢有限公司 | A kind of on-Line Monitor Device and monitoring method for monitoring electroslag furnace water-cooled cable |
| CN111271853A (en) * | 2019-08-29 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Wireless sensor system |
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| JPS6139540A (en) * | 1984-07-31 | 1986-02-25 | Hitachi Electronics Eng Co Ltd | Temperature measuring system of wafer processor |
| CN2116911U (en) * | 1990-07-07 | 1992-09-23 | 杨彬 | High-voltage multipurpose live-line measuring instrument |
| CN2634487Y (en) * | 2003-06-03 | 2004-08-18 | 南京世纪东方电子有限责任公司 | Distribution monitoring terminal |
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| CN101319938A (en) * | 2008-07-08 | 2008-12-10 | 周骁威 | On-line temperature measurement method and device for cable joint of high-voltage plant |
| CN102435832A (en) * | 2011-10-13 | 2012-05-02 | 北京交通大学 | Single-phase distribution transformer operation monitoring metering device |
| CN102749150A (en) * | 2011-04-20 | 2012-10-24 | 常州帕斯菲克自动化技术有限公司 | Cable head temperature online monitoring device |
| CN103424666A (en) * | 2013-07-18 | 2013-12-04 | 广东电网公司电力科学研究院 | Overhead line fault indicator with voltage detection function |
| CN103682862A (en) * | 2013-12-25 | 2014-03-26 | 航天科工深圳（集团）有限公司 | Cable plug connector of ring main unit |
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2014
- 2014-07-16 CN CN201410337882.0A patent/CN104062490A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139540A (en) * | 1984-07-31 | 1986-02-25 | Hitachi Electronics Eng Co Ltd | Temperature measuring system of wafer processor |
| CN2116911U (en) * | 1990-07-07 | 1992-09-23 | 杨彬 | High-voltage multipurpose live-line measuring instrument |
| CN2634487Y (en) * | 2003-06-03 | 2004-08-18 | 南京世纪东方电子有限责任公司 | Distribution monitoring terminal |
| CN2645058Y (en) * | 2003-07-23 | 2004-09-29 | 太原昶宇电力新技术有限公司 | Current carrying conductor temperature measurement sensing device having induction power source |
| CN101319938A (en) * | 2008-07-08 | 2008-12-10 | 周骁威 | On-line temperature measurement method and device for cable joint of high-voltage plant |
| CN102749150A (en) * | 2011-04-20 | 2012-10-24 | 常州帕斯菲克自动化技术有限公司 | Cable head temperature online monitoring device |
| CN102435832A (en) * | 2011-10-13 | 2012-05-02 | 北京交通大学 | Single-phase distribution transformer operation monitoring metering device |
| CN103424666A (en) * | 2013-07-18 | 2013-12-04 | 广东电网公司电力科学研究院 | Overhead line fault indicator with voltage detection function |
| CN103682862A (en) * | 2013-12-25 | 2014-03-26 | 航天科工深圳（集团）有限公司 | Cable plug connector of ring main unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627738A (en) * | 2017-03-16 | 2018-10-09 | 宝钢特钢有限公司 | A kind of on-Line Monitor Device and monitoring method for monitoring electroslag furnace water-cooled cable |
| CN111271853A (en) * | 2019-08-29 | 2020-06-12 | 宁波奥克斯电气股份有限公司 | Wireless sensor system |
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Application publication date: 20140924 |