EP3080553A1 - Surge-protected sensor element - Google Patents
Surge-protected sensor elementInfo
- Publication number
- EP3080553A1 EP3080553A1 EP14814797.8A EP14814797A EP3080553A1 EP 3080553 A1 EP3080553 A1 EP 3080553A1 EP 14814797 A EP14814797 A EP 14814797A EP 3080553 A1 EP3080553 A1 EP 3080553A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor element
- sensor
- component
- input
- pptc
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Definitions
- the invention relates to a sensor element with an overvoltage protection with at least one sensor for detecting an operating parameter as well as electronic components and an input for a power supply, according to the features of the preamble of claim 1.
- Such sensor elements also known as “intelligent” or “active” sensor elements are known. These sensor elements comprise an assembly which includes at least one sensor with which an operating parameter of a system, a system, a vehicle or the like is to be detected. Depending on the operating parameter to be detected, the respective sensor is formed. These are preferably non-contact sensors with which operating parameters such as pressure, temperature, speed, force and the like (enumeration is not exhaustive) are detected. By detecting the operating parameter, the sensor provides an output signal or is supplied with a power supply so as to be able to detect the operating parameter and generate an output signal. In both cases, the output signal of the at least one sensor is processed by downstream electronic components in the known sensor elements, for example amplified, filtered, checked for plausibility or the like.
- a sensor element also referred to as a sensor assembly
- a sensor element is usually seen as a small and inexpensive component in a complete sensor device, which also includes a housing, a power supply, connections and the like.
- a sensor board surface which today is not more than a few square centimeters, space requirements, space requirements, manufacturing costs, simplicity and high sensitivity in detecting the operating parameter are the main requirements.
- one of the main requirements of such a sensor element is that it function properly under all operating conditions. In the harsh ambient conditions, which often fluctuate temperatures, humidities and the like, it can also happen over and over again that electrical interference pulses act on the sensor element and thus also on the sensor itself. As a result, there is a risk that the sensor element will provide incorrect output values or, in the worst case, be temporarily disabled by such an interference pulse or even completely destroyed.
- the invention is therefore based on the object to improve a sensor element to the effect that it is effectively protected against electrical interference pulses that can act on the sensor element from the outside.
- an electronic component is connected in series at the input of the sensor element and designed as a PPTC component.
- the PPTC (Polymer Positive Positive Coefficient) component is an electronic fuse block that combines the function of over-temperature protection with that of a switch.
- the PPTC device is a low-resistance, temperature-sensitive device, so it can Because of these characteristics, advantageously at the input can be connected in series, so that the transmitted power supply voltages and / or the transmitted output signals are not disturbed, falsified or blocked when the sensor element is operated in the normal state.
- This PPTC device has the advantageous property that its resistance rapidly increases with a certain heating and limits the current. In this function, the PPTC component locks and remains in that state even when the temperature load decreases.
- This PPTC component has the advantage that, due to these properties, it can be used as a resettable fuse with respect to interference pulses.
- Another advantage of this component is the fact that it serves equally as a thermal fuse and also as overcurrent protection. It can be designed for sensor elements for different voltages and also has the advantage that when an interference pulse has acted on the sensor element, in this case of damage acts as a resettable fuse and not like a conventional fuse, in particular a fuse exchanged must become. This advantageously increases the user-friendliness during the life of such a sensor element.
- PPTC devices are also referred to as polymer PTCs.
- the power consumption of the sensor element is less than or equal to 100 mA, preferably less than or equal to 50 mA.
- a serial element is needed to reduce the current. This element must be able to withstand the voltage drop and the resulting power loss during the interference pulse. If the current consumption of the sensor assembly under all conditions is less than or equal to 50 milliamps ( ⁇ 50 mA), one can use for this purpose the PTC Resetab Fuse (PPTC) according to the invention in combination with other suitable components. Thus, it is even possible to pass the level 2 of the test.
- PPTC PTC Resetab Fuse
- a diode, in particular a TVS diode, and a capacitor, in particular an SMD capacitor, are in the input of the sensor element capable of easily picking up the remaining energy of the interference pulse.
- the resulting input voltage for further required DCDC controller is less than 50 V, which can be assumed without problems.
- the sensor element has means for carrying out a reset.
- the PPTC component is reset by switching the supply voltage off and on again.
- means such as switches, buttons or the like are provided in an advantageous manner, with which this switching off and on again the supply voltage can be realized.
- a sensor element is available available in an advantageous manner, which is extremely user-friendly.
- the at least one sensor and the associated electronic components are arranged on a common printed circuit board.
- the sensor element according to the invention can be realized in accordance with the requirements on a small area (preferably less than a few square centimeters).
- the power supply of the sensor element such as a battery, a battery, a photovoltaic element or the like, be arranged on the circuit board.
- the sensor element has a housing, within which the at least one sensor, the electronic components and optionally further elements of the sensor element are accommodated.
- the housing may be a one- or multi-part housing, in which the individual components of the sensor element are arranged.
- the sensor element is encapsulated with its at least one sensor, the electronic components, the circuit board and optionally other means with a plastic, so that it effectively protects against external influences such as impurities, especially with metallic particles, moisture and mechanical effects is.
- the application of a sensor element according to the invention for detecting operating parameters of working machines is advantageously carried out.
- working machines it is already very important in normal operation that their operating parameters are reliably and permanently detected error-free, as this depends on the safety-critical operation of such machines essential.
- sensor elements or their sensors are often double or multiple because of the prescribed redundancy available.
- the sensor element for such working machines is effectively protected against external electrical interference pulses (advantageously short pulses, in particular in the microsecond range, for example in the range around 50 microseconds), which can quite often occur during the operation of such machines.
- the PPTC component In the normal case, ie if there is no external interference, in particular no interference signal or no interference pulse, the PPTC component has no effect. Only in the event of a fault, that is to say when an interference pulse acts on the sensor element from the outside, the PPTC component reacts as a stable high-voltage resistor and thus effectively reduces the voltages or currents acting on the PPTC component to such a degree that the sensor element is no longer damaged takes. This will be done ensures that the PPTC component does not alloy in a small volume of space (compared to other known security elements).
- the resiliency of this component also has the advantage that when another interference signal (not the interference pulse described above) has the sensor element "quasi off", a reset and recommissioning can be done quickly and easily, so that the work with the machine only briefly had to be interrupted.
- the sensor element 1 as far as shown in detail, a sensor 2, wherein more than one sensor 2 may be present. Furthermore, electronic components 3 to 7 are present.
- the electronic component 3 is the PPTC component connected in series in accordance with the invention, the electronic component 4 being a diode, the electronic component 5 likewise a diode, in particular a Shottky diode, in the case of the electronic component 6 Capacitor, in particular an electrolytic capacitor and the electronic component 7 by a load resistor.
- the sensor element 1 has an input 8, in particular two input terminals or the like. About this input 8, the sensor element 1 is supplied with energy. This energy comes from a power supply 9, which is either coupled from the outside to the sensor element 1 or also integrated in the sensor element 1 itself.
- an interference pulse generator 10 is temporarily connected to the input 8 of the sensor element 1. With the interference pulse generator 10, an interference pulse is applied to the input 8 in dependence on specifiable test conditions. Since in the inventive manner, the electronic component 3 is connected in series and is designed as a PPTC component, the energy of this interference pulse is absorbed by this component and thus prevents the interference pulse to the other components of the sensor element 1, in particular to the Sensor 2, can act in a disadvantageous manner.
- the interference pulse generator 10 is connected to the input 8 via an electronic component 11, for example a capacitor.
- the power supply 9 (power source) this can be connected directly to the input 8.
- the power supply 9 is connected via two further series-connected electronic components 12, 13 (designed here as coils) to the input 8.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013020583.2A DE102013020583A1 (en) | 2013-12-13 | 2013-12-13 | Sensor element with overvoltage protection |
PCT/EP2014/076963 WO2015086553A1 (en) | 2013-12-13 | 2014-12-09 | Surge-protected sensor element |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3080553A1 true EP3080553A1 (en) | 2016-10-19 |
Family
ID=52117872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14814797.8A Withdrawn EP3080553A1 (en) | 2013-12-13 | 2014-12-09 | Surge-protected sensor element |
Country Status (7)
Country | Link |
---|---|
US (1) | US20160282138A1 (en) |
EP (1) | EP3080553A1 (en) |
JP (1) | JP2017505427A (en) |
CN (1) | CN105829833A (en) |
CA (1) | CA2932499A1 (en) |
DE (1) | DE102013020583A1 (en) |
WO (1) | WO2015086553A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108242802A (en) * | 2016-12-23 | 2018-07-03 | 华为技术有限公司 | Interface protection circuit and equipment interface |
CN107390073A (en) * | 2017-09-01 | 2017-11-24 | 京东方科技集团股份有限公司 | Circuit board and its manufacture method, terminal test system |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4312841C2 (en) * | 1993-04-20 | 1995-06-29 | Lancier Masch Peter | Device for measuring transmission between sensors and a monitoring device |
DE19711371C1 (en) * | 1997-03-19 | 1998-08-27 | Tekmar Elektronik Gmbh & Co | Device and procedure for snow and ice reporting |
US7616420B2 (en) * | 2000-12-26 | 2009-11-10 | Landis+Gyr, Inc. | Excessive surge protection method and apparatus |
US6850664B2 (en) * | 2001-12-14 | 2005-02-01 | General Electric Company | Fiber optic converters for incremental shaft encoders |
ITMI20080073U1 (en) * | 2008-02-25 | 2009-08-26 | Cross Technology S R L | VENDING MACHINE |
CN201383889Y (en) * | 2009-04-01 | 2010-01-13 | 谢建强 | LED circuit |
DE202009008297U1 (en) * | 2009-06-11 | 2009-09-17 | Ema Precision Electronics (Suzhou) Corp. | Pressure-temperature sensor |
US8421275B2 (en) * | 2009-11-19 | 2013-04-16 | Electrolux Home Products, Inc. | Apparatus for providing zero standby power control in an appliance |
US8564158B2 (en) * | 2010-04-21 | 2013-10-22 | Electrolux Home Products, Inc. | Appliance having user detection functionality for controlling operation thereof |
CN102412549A (en) * | 2010-09-21 | 2012-04-11 | 付云鹏 | GPTC over-current protection circuit with simplest structure |
CN102025140B (en) * | 2010-12-10 | 2013-09-18 | 深圳市万瑞和电子有限公司 | Polymeric positive temperature coefficient (PPTC) overcurrent protection module and electronic products |
US20120170163A1 (en) * | 2010-12-31 | 2012-07-05 | Adrian Mikolajczak | Barrier diode for input power protection |
RU2014110527A (en) * | 2011-08-31 | 2015-10-10 | Хиршманн Аутомейшн энд Контрол ГмбХ | LOAD MEASUREMENT ON THE LIFT OF THE LIFTING MECHANISMS |
WO2013102204A1 (en) * | 2011-12-30 | 2013-07-04 | Club Car Llc | Charging system for fleet golf cart |
CN102723706B (en) * | 2012-05-30 | 2015-08-19 | 武汉烽火网络有限责任公司 | PoE port overvoltage integrated protection circuit and its implementation |
US9190829B2 (en) * | 2012-06-02 | 2015-11-17 | Arris Technology, Inc. | Surge protector |
-
2013
- 2013-12-13 DE DE102013020583.2A patent/DE102013020583A1/en not_active Ceased
-
2014
- 2014-12-09 CN CN201480068220.6A patent/CN105829833A/en active Pending
- 2014-12-09 CA CA2932499A patent/CA2932499A1/en not_active Abandoned
- 2014-12-09 EP EP14814797.8A patent/EP3080553A1/en not_active Withdrawn
- 2014-12-09 JP JP2016539153A patent/JP2017505427A/en active Pending
- 2014-12-09 WO PCT/EP2014/076963 patent/WO2015086553A1/en active Application Filing
- 2014-12-09 US US15/031,013 patent/US20160282138A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015086553A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013020583A1 (en) | 2015-06-18 |
CN105829833A (en) | 2016-08-03 |
US20160282138A1 (en) | 2016-09-29 |
WO2015086553A1 (en) | 2015-06-18 |
CA2932499A1 (en) | 2015-06-18 |
JP2017505427A (en) | 2017-02-16 |
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