CN110187217B - Connector for current online detection and active end thereof - Google Patents
Connector for current online detection and active end thereof Download PDFInfo
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- CN110187217B CN110187217B CN201811457741.7A CN201811457741A CN110187217B CN 110187217 B CN110187217 B CN 110187217B CN 201811457741 A CN201811457741 A CN 201811457741A CN 110187217 B CN110187217 B CN 110187217B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
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- Physics & Mathematics (AREA)
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- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to a connector for current online detection and an active end thereof, belonging to the field of connector performance measurement. According to the invention, the current of the active end signal contact element is detected by the magnetic sheet collecting sensor, and the current is sent to the current signal input end of the current detection circuit, so that the on-line detection of the working current of the connector is realized, the integration of the current detection device in the connector is realized by the active end integrated circuit board and the magnetic sheet collecting sensor, the integrated active end and connector are relatively small in size, and the external structure size of the existing plug and socket is not required to be changed.
Description
Technical Field
The invention belongs to the field of connector performance measurement, and particularly relates to a connector for current online detection and an active end thereof.
Background
At present, the internal state of a traditional passive connector is unknown relative to an external system, and the traditional passive connector cannot be effectively monitored, and the connector is used as a system signal interconnection interface, once the connector fails, disastrous results are caused to the whole external system, for example, a large-current connector which is usually used on a generator, a mine and other system key equipment is used as a main interface of an energy source, and once the connector suddenly fails, the equipment is shut down, and the whole system is paralyzed seriously, so that a serious safety accident is caused. In order to achieve fault prediction and health management at the overall system level, visualization of the internal state of the connector must first be achieved, with real-time monitoring of its critical characteristic values.
According to statistics, overload faults in the failure or fault phenomena of the high-current connector account for more than 70%, and other faults include aging faults, poor contact of a contact element and the like. The overload fault is usually caused by a system short circuit or long-term overload operation, and the system short circuit fault can cause the working current of the connector to suddenly rise, so that whether the overload fault occurs can be discriminated by self-detecting the working current value of the connector.
However, the on-line detection of the operating current of the connector is limited by two conditions: firstly, the inner space of the connector is narrow; second, the measuring element cannot change the internal state and performance of the connector.
At present, in order to realize the working current detection of a connector, a common current measurement method is a direct measurement method, namely, a contact element in a plug or a socket is broken, a wrong-needle contact element is introduced, and a sampling resistor or an integrated current sensor chip is connected in series between the wrong-needle contact element and the contact element in the plug/socket for measurement, so that the existing contact element structure of the connector is greatly changed, the performance of the connector is greatly uncertain affected, and the volume of the connected sampling resistor is large, and the sampling resistor cannot be integrated in the connector. Although the traditional Hall current sensor can realize indirect measurement of the working current of the connector, the size is still large, and the traditional Hall current sensor is not easy to integrate in the connector.
Disclosure of Invention
The invention aims to provide a connector for current online detection and an active end thereof, which are used for solving the problem that the online detection of the working current of the connector cannot be realized because the current detection device for detecting the working current of the connector is large in size and cannot be integrated in the connector.
In order to solve the technical problem, the invention provides an active end of a connector for current online detection, wherein a circuit board is arranged in the active end, a current detection circuit is arranged on the circuit board, and the current detection circuit is provided with a current signal input end;
a current sensor for detecting current flowing through the active terminal signal contact element is arranged in the active terminal, and the current sensor is connected with the current signal input terminal; the current sensor is a magnetic collecting sheet sensor and is integrated on the circuit board.
In order to solve the above technical problem, the present invention further provides a connector for current on-line detection, which includes a passive end and the active end.
According to the connector and the active end thereof, the current of the active end signal contact element (namely the working current of the connector) is detected through the magnetic collecting sheet sensor and is sent to the current signal input end of the current detection circuit, the on-line detection of the working current of the connector is realized, the integration of the current detection device in the connector is realized through the circuit board integrated with the active end and the magnetic collecting sheet sensor, the volume of the integrated active end and the size of the connector are relatively small, and the external structure size of the existing plug and socket is not required to be changed. In addition, the connector and the active end thereof do not cause adverse effect on the working performance of the connector, and are very suitable for industrial production.
The circuit board is a rigid printed board, so that the circuit on the circuit board is prevented from being damaged due to deformation, and the measurement of the working current of the connector is prevented from being influenced.
The extending direction of the circuit board is consistent with the extending direction of the active end signal contact piece, so that the detection effect of the magnetic sheet collecting sensor on the working current of the connector is ensured.
The active end is also provided with a shielding cylinder, and the shielding cylinder is arranged on the corresponding active end signal contact element in a penetrating manner, is fixed on the circuit board and is used for shielding an external magnetic field and improving the detection effect of the magnetic sheet collecting sensor on the working current of the connector.
Furthermore, the circuit board is also provided with a communication interface, and the communication interface is connected with a communication interface contact element and used for communicating with an upper computer through the communication interface and the communication interface contact element. Meanwhile, the circuit board is also provided with a power interface, and the power port is connected with a power interface contact piece and is used for being connected with a power supply through the power interface contact piece so as to provide working electricity for the circuit board.
Drawings
FIG. 1 is a schematic view of the connector configuration of the present invention;
FIG. 2 is a schematic diagram of an SIP package of an active control chip and an operational amplifier chip in the connector of the present invention;
FIG. 3 is a mechanical block diagram of the connector of the present invention;
the reference numerals of the drawings are explained below:
the device comprises a passive end signal contact element, a passive end shell, a passive end insulator, a passive end printed board, a passive end auxiliary contact element, a passive end shell, an active end front end insulator, an active end auxiliary contact element, a state indicator lamp, a spring plate, an active control chip, an active end printed board, a current sensor, an active end rear end insulator, a power communication interface, a temperature sensor, an active end signal contact element and a shielding cylinder, wherein the passive end signal contact element is 1, the passive end shell is 2, the passive end insulator is 3, the active end auxiliary contact element is 4, the state indicator lamp is 9, the spring plate is 10, the active control chip is 11, the active end printed board is 12, the current sensor is 13, the active end rear end insulator is 14, the power communication interface is 15, the temperature sensor is 16, the active end signal contact element is 17, and the shielding cylinder is 18.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Connector embodiment:
the connector shown in fig. 1 includes an active end and a passive end, the active end being a connector receptacle and the passive end being a connector plug. The active terminal comprises an active terminal shell 6, an active terminal front-end insulator 7, an active terminal rear-end insulator 14, an active terminal signal contact element 17, an active terminal auxiliary contact element 8 and an active terminal printed board 12, wherein the active terminal auxiliary contact element 8 is fixed on the active terminal front-end insulator 7, and the active terminal auxiliary contact element 8 is connected to the active terminal printed board 12 in a bent needle mode.
An active control chip 11, a status indicator lamp 9, a current sensor 13, a temperature sensor 16, and a contact resistance detection circuit including a current detection circuit having a current signal input terminal and a voltage detection circuit having an active terminal voltage signal input terminal and a passive terminal voltage signal input terminal are integrally arranged on the active terminal printed board 12. The active control chip 11 is respectively connected with the status indicator lamp 9 and the temperature sensor 16, the active control chip 11 is connected with the current sensor 13 through a current signal input end of the current detection circuit, and the current sensor 13 is used for detecting the current flowing through the active end signal contact piece 17 and transmitting the current of the active end signal contact piece 17 to the active control chip 11, so that the detection of the working current of the connector is realized.
The current sensor 13 in this embodiment is a magnetic chip sensor (integrated chip sensor having a parallel magnetic field measurement function) and is arranged on the active-side printed board 12, and the extending direction of the active-side printed board 12 is the same as the extending direction of the active-side signal contact 17. The magnetic sheet collecting sensor can detect a horizontal magnetic field parallel to the active end signal contact piece 17 of the magnetic sheet collecting sensor, is insensitive to an external vertical magnetic field, and obtains the current of the active end signal contact piece 17, namely the working current of the connector. The magnetic collecting sheet sensor is preferably in a model of MLX91208 of Melexis, and the maximum value of the measuring current can reach 1000A.
The active end is also provided with a shielding cylinder 18, and the shielding cylinder 18 is arranged on the corresponding active end signal contact element 17 in a penetrating way and fixed on the active end printed board 12. The shielding cylinder is used for shielding external magnetic fields, namely other magnetic fields except the horizontal magnetic field of the active end signal contact piece 17, and the working current detection of the connector is prevented from being interfered.
In the mechanical structure of the connector shown in fig. 3, the shielding cylinder 18 surrounding the active-end signal contact 17 is placed above the current sensor 13, so that the magnetic field above the current sensor 13 is parallel to the current sensor 13, and the influence of the external magnetic field on the current sensor 13 is shielded, thereby further improving the accuracy of magnetic field measurement, and finally, the working current of the connector (i.e. the current of the active-end signal contact 17) is obtained through the corresponding relationship between the magnetic field and the current, thereby realizing the non-contact measurement of the working current of the connector.
In order to realize the voltage measurement of the active end signal contact element 17, the active end signal contact element 17 is connected with the shrapnel 10, the shrapnel 10 is connected with the active end voltage signal input end, the contact resistance detection circuit sequentially collects the voltage of the active end signal contact element 17 through the shrapnel 10 and the active end voltage signal input end, and sends the voltage of the active end signal contact element 17 to the active control chip 11.
In order to realize the voltage measurement of the passive end signal contact element 1, the passive end comprises a passive end shell 2, the passive end signal contact element 1, a passive end insulator 3, a passive end printed board 4 and a passive end auxiliary contact element 5, the passive end signal contact element 1 penetrates through a wall type wire sealing body, the passive end insulator 3, the passive end printed board 4 and an interface wire sealing body to be fixed, and the passive end auxiliary contact element 5 and the passive end printed board 4 are fixed on the passive end insulator 3 and the interface wire sealing body.
One end of the passive printed board 4 is conductively connected with the passive signal contact element 1, the other end of the passive printed board is conductively connected with the passive auxiliary contact element 5, and the passive printed board 4 is provided with a copper-coated wire which is connected with the passive signal contact element 1 and the passive auxiliary contact element 5. Meanwhile, the active end is also provided with an active end auxiliary contact element 8, the active end auxiliary contact element 8 is connected with a passive end voltage signal input end, and the active end auxiliary contact element 8 and the passive end auxiliary contact element 5 are arranged, so that when the active end and the passive end are assembled together, the active end auxiliary contact element 8 and the passive end auxiliary contact element 5 are also connected together, the voltage of the passive end signal contact element 1 is transmitted to the passive end voltage signal input end through the passive end printed board 4, the passive end auxiliary contact element 5 and the active end auxiliary contact element 8 in sequence, and finally, the voltage of the passive end signal contact element 1 is collected by the contact resistance detection circuit and is sent to the active control chip 11.
The active control chip 11 calculates a voltage difference between the two voltages (i.e., a terminal voltage of the contact resistor) according to the collected voltage of the active terminal signal contact 17 and the voltage of the passive terminal signal contact 1, and calculates a resistance value of the contact resistor according to the obtained voltage difference and a working current of the connector (i.e., a current of the active terminal signal contact 17), thereby realizing real-time monitoring of the resistance value of the contact resistor.
The temperature sensor 16 in this embodiment is welded to the active-end printed board 12, and may be a thermistor, a platinum resistor, or a commonly used temperature sensor such as an infrared temperature sensor. The active control chip 11 collects temperature signals of the temperature sensor 16, and real-time reading of the internal working temperature of the connector is achieved.
In order to reduce the volume of the connector, in this embodiment, a chip with a smaller package and a higher integration level is selected as much as possible, and the volume of the whole active circuit is further reduced by SIP packaging, the SIP packaging is as shown in fig. 2, and an operational amplifier chip is packaged at the same time, the operational amplifier chip includes a contact resistance detection circuit, a current signal detection circuit acquired by a current sensor 13 and a detection circuit of the temperature signal, each detection circuit is transmitted to an active control chip 11, the active control chip in fig. 2 includes an MCU, and the MCU performs communication interaction with an upper computer through a protocol chip. The active control chip 11 completes sampling of voltage signals at two ends after the active end signal contact member 17 at the socket end and the passive end signal contact member 1 at the plug end are plugged, sampling of current signals collected by the current sensor 13 and sampling of the temperature signals, and then amplification processing and A/D conversion of the operational amplifier chip are respectively carried out, so that voltage values (namely terminal voltage of the contact resistor), working current and working temperature at two ends of the contact member are obtained, resistance values of the contact resistor are calculated according to the voltage values at two ends of the contact member and the working current, and the collected and calculated data are stored for being conveniently consulted later.
The power supply communication interface 15 includes a power supply interface and a communication interface, and is connected to the active-side printed board 12 in a structure of a bent pin contact, and may also be connected to the active-side printed board 12 in a structure of a lead wire, a fastener, or the like.
The power communication interface 15 conforms to known general connection interface standards, such as RS485, RS232, CAN, IO, USB, and ethernet interfaces. The power supply communication interface 15 transmits the encoded working temperature value, the encoded working current value, the encoded contact resistance value and the current working state of the connector to the remote control terminal, so that the real-time monitoring and the fault detection of each parameter of the connector are realized. The active control chip 11 compares the obtained real-time state value (including the working temperature value, the working current value and the contact resistance value) of the connector with a preset fault threshold value, and when the active control chip 11 judges that the connector is in a fault state, the active control chip drives the state indicator lamp 9 (namely, the LED indicator lamp in the figure 2) of the connector to turn red and flash for alarming, then codes data, and transmits the data to the upper computer through a corresponding protocol chip. The LED indicator lamp is placed in the groove of the active end shell 6, and glass resin is placed on the LED indicator lamp and used for protecting the LED indicator lamp.
The power supply of the embodiment selects a low-voltage direct-current power supply of 5V, is accessed from the outside through the power supply communication interface 15, and supplies power to the active control chip 11 and the current sensor 13. As another embodiment, the power source may also be a button cell, and is mounted on the active-end printed board 12, so that only the communication interface in the power source communication interface 15 is reserved without taking power from the outside.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. For example, the connector of the present embodiment realizes measurement of the connector operating current by the current detection circuit and the current sensor provided, and realizes terminal voltage detection of the contact resistance by the voltage detection circuit. As another embodiment, related components may be provided as needed, and if it is only necessary to detect the operating current of the connector and not to detect other parameters, only the current detection circuit and the magnetic flux sheet sensor may be provided on the active-side printed board. For another example, the active terminal of this embodiment may be used as a connector plug, and the passive terminal may be used as a connector socket, which is specifically set according to the actual application.
For another example, since the active-side signal contact element of the active side and the passive-side signal contact element of the passive side are both two, voltage detection of the active-side signal contact element can be performed on one of the active-side signal contact elements, and voltage of the two active-side signal contact elements can also be detected; similarly, voltage detection of the passive end signal contact may be performed on one of the passive end signal contacts, and voltages of the two passive end signal contacts may also be detected, as shown in fig. 3, current of both the passive/active end signal contacts is detected.
For another example, in the embodiment, the copper-clad wire of the passive-end printed board is used to connect the passive-end signal contact element and the passive-end auxiliary contact element, and as another alternative, the passive-end signal contact element and the passive-end auxiliary contact element may also be connected through a structure such as a spring plate or a probe; for another example, the active terminal voltage signal input end and the active terminal signal contact element are connected by the elastic sheet, and the active terminal voltage signal input end and the active terminal signal contact element are used for leading the voltage of the active terminal signal contact element to the active terminal voltage signal input end.
For another example, in order to avoid the magnetic field generated by the circuit on the active-end printed board from interfering with the magnetic field induced by the current sensor, two active-end printed boards may be provided, which are respectively a first rigid printed board and a second rigid printed board, the second rigid printed board is provided with the magnetic sheet collecting sensor, the first rigid printed board is provided with other devices except the magnetic sheet collecting sensor, such as an active control chip, a status indicator lamp, a temperature sensor, and a contact resistance detection circuit, the extending direction of the first rigid printed board is perpendicular to the extending direction of the active-end signal contact element, the extending direction of the second rigid printed board is consistent with the extending direction of the active-end signal contact element, the current detection of the active-end signal contact element is realized by the second rigid printed board, and the current detection is realized by the second rigid printed board.
Therefore, any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Active end embodiment:
the present embodiment proposes an active end of a connector for current on-line detection, which is the active end in the above connector embodiment, and the active end in the present embodiment may be disposed in a plug or a socket. The connector operating current detected by the active terminal of the present embodiment can be used for determining a short-circuit fault in a monitoring system.
Claims (6)
1. A connector for current online detection is characterized by comprising an active end and a passive end, wherein a circuit board is arranged in the active end, and a contact resistance detection circuit, an active control chip and a current sensor are arranged on the circuit board; the contact resistance detection circuit comprises a current detection circuit and a voltage detection circuit, wherein the current detection circuit is provided with a current signal input end, and the voltage detection circuit is provided with an active end voltage signal input end and a passive end voltage signal input end; the active control chip is connected with the current sensor through the current signal input end;
the current sensor is used for detecting the current flowing through the active end signal contact piece and transmitting the current of the active end signal contact piece to the active control chip; the current sensor is a magnetic sheet collecting sensor and is integrated on the circuit board;
an active end voltage signal input end of the voltage detection circuit is connected with a source end signal contact element and is used for collecting the voltage of the active end signal contact element and sending the voltage of the active end signal contact element to the active control chip;
the passive end comprises a passive end signal contact element and a passive end auxiliary contact element, the passive end signal contact element and the passive end auxiliary contact element are connected through a passive end printed board, when the active end and the passive end are assembled together, the active end auxiliary contact element and the passive end auxiliary contact element are also connected together, so that the voltage of the passive end signal contact element is transmitted to a passive end voltage signal input end through the passive end printed board, the passive end auxiliary contact element and the active end auxiliary contact element in sequence, and is collected by the contact resistance detection circuit through the passive end voltage signal input end and sent to the active control chip.
2. The current on-line detecting connector according to claim 1, wherein the circuit board is a rigid printed board.
3. The current on-line detecting connector according to claim 1, wherein the extending direction of the circuit board is identical to the extending direction of the active terminal signal contact.
4. The current on-line detecting connector according to claim 1, wherein the active end is further provided with a shielding cylinder, and the shielding cylinder is inserted into the corresponding active end signal contact and fixed on the circuit board.
5. The current on-line detecting connector according to claim 1, wherein the circuit board further has a communication interface, and the communication interface is connected with a communication interface contact.
6. The current on-line detecting connector according to claim 1, wherein the circuit board further has a power interface, and the power interface is connected with a power interface contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457741.7A CN110187217B (en) | 2018-11-30 | 2018-11-30 | Connector for current online detection and active end thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457741.7A CN110187217B (en) | 2018-11-30 | 2018-11-30 | Connector for current online detection and active end thereof |
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| Publication Number | Publication Date |
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| CN110187217A CN110187217A (en) | 2019-08-30 |
| CN110187217B true CN110187217B (en) | 2022-05-13 |
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| CN201811457741.7A Active CN110187217B (en) | 2018-11-30 | 2018-11-30 | Connector for current online detection and active end thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112440287A (en) * | 2020-11-05 | 2021-03-05 | 创泽智能机器人集团股份有限公司 | Quick interface structure suitable for service robot |
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| CN105723228A (en) * | 2013-09-10 | 2016-06-29 | 莫列斯有限公司 | Connector with sensor |
| CN203673000U (en) * | 2013-09-13 | 2014-06-25 | 株洲中车轨道交通装备有限公司 | Built-in leakage current sensor-equipped electric power supply connector |
| CN204144579U (en) * | 2014-07-02 | 2015-02-04 | 武汉东途机电工程有限公司 | A kind of novel high current connector |
| CN205882314U (en) * | 2016-07-19 | 2017-01-11 | 国网新疆电力公司电力科学研究院 | Integrated smart jack that observes and controls |
| CN206195010U (en) * | 2016-11-01 | 2017-05-24 | 深圳龙友科技股份有限公司 | Connector of nai loud -break switch |
| CN206920498U (en) * | 2017-04-01 | 2018-01-23 | 苏州汇川联合动力系统有限公司 | A kind of discrete current sensor |
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