CN210123456U - Intelligent control switch with contact temperature detection function - Google Patents

Intelligent control switch with contact temperature detection function Download PDF

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Publication number
CN210123456U
CN210123456U CN201920410440.2U CN201920410440U CN210123456U CN 210123456 U CN210123456 U CN 210123456U CN 201920410440 U CN201920410440 U CN 201920410440U CN 210123456 U CN210123456 U CN 210123456U
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contact
switch
signal processing
processing circuit
intelligent control
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CN201920410440.2U
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梁政
梁新汉
谭春林
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Shenzhen Hanming Electronics Co Ltd
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Shenzhen Hanming Electronics Co Ltd
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Abstract

An intelligent control switch with contact temperature detection comprises a contact temperature sensor, a contact resistance detection circuit, a signal processing circuit and a control unit, wherein the contact temperature sensor detects the temperature of the surface of a switch contact, the contact resistance detection circuit comprises two groups of current transformers and voltage transformers, one group of current transformers and voltage transformers are arranged at the front end of the switch contact, the other group of current transformers and voltage transformers are arranged at the rear end of the switch contact, the contact temperature sensor and the contact resistance detection circuit are connected with the signal processing circuit, the output end of the signal processing circuit is connected with the control unit, the signal processing circuit processes the detection signals, the state of the switch contact is judged, and the control unit controls early warning, alarming or executing preset safety control action according to the information output by the signal processing circuit. By using the intelligent control switch, the power utilization accident caused by poor contact of the switch contact can be avoided to the greatest extent.

Description

Intelligent control switch with contact temperature detection function
Technical Field
The utility model relates to an electric wire switch especially relates to an intelligent control switch who takes contact temperature to detect.
Background
In order to detect whether the switch is in poor contact, the prior art measures the internal contact resistance of the switch by a voltage or current method, and judges whether the switch is in good contact or not by calculating the contact resistance of the switch. However, under the influence of, for example, unstable system power supply, measurement circuit precision and electronic circuit interference, the method of using the micro-resistance method to judge whether the switch contact is good is susceptible to the influence of voltage and current changes, the contact resistance of the switch cannot be accurately measured, and judgment errors are easily generated to cause false alarm or false alarm. The accident is easy to be caused especially by inaccurate judgment, and potential safety hazard or economic loss is brought.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at overcomes prior art's is not enough, provides a take contact temperature detection's intelligent control switch to avoid switch contact failure and arouse the power consumption accident to the at utmost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an intelligent control switch with contact temperature detection comprises a contact temperature sensor, a contact resistance detection circuit, a signal processing circuit and a control unit, wherein the contact temperature sensor is arranged on a detected switch contact and used for detecting the temperature on the surface of the switch contact, the contact resistance detection circuit is used for detecting the contact resistance of the switch contact, the contact resistance detection circuit comprises two groups of current transformers and voltage transformers, one group of the current transformers and the voltage transformers are arranged at the front end of the switch contact, the other group of the current transformers and the voltage transformers are arranged at the rear end of the switch contact, the two groups of the current transformers and the voltage transformers respectively detect current and voltage signals at corresponding positions, and the signal output ends of the contact temperature sensor and the contact resistance detection circuit are connected with the signal processing circuit, the output end of the signal processing circuit is connected with the control unit, the signal processing circuit is used for judging the state of the switch contact according to a contact resistance and switch contact surface temperature double detection signal, and the control unit is used for controlling early warning, alarming or executing a preset safety control action according to information output by the signal processing circuit.
Further:
the contact temperature sensor is a platinum resistance temperature sensor, a digital temperature sensor or a thermocouple sensor.
The signal processing circuit comprises a plurality of operational amplifiers, an analog-to-digital converter and a data processing unit, wherein the current transformer, the voltage transformer and the contact temperature sensor are respectively connected to the input end of one operational amplifier, the output end of each operational amplifier is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected with the data processing unit.
The data processing unit is a micro control unit.
The display unit is connected with the signal processing circuit and used for displaying the detection information of the switch contact.
The system also comprises a communication part connected with the signal processing circuit and used for sending the detection information to a monitoring terminal and/or networking so as to realize cross-region monitoring management.
The monitoring terminal is a mobile phone of a user or a computer of a management center.
And the storage device is connected with the signal processing circuit and is used for storing detection information and/or preset information related to judgment.
The switch is a switch in a single-phase or three-phase alternating current system, or a switch in a direct current system.
The utility model discloses following beneficial effect has:
the utility model discloses an intelligent control switch includes contact temperature sensor, contact resistance detection circuitry, signal processing circuit and control unit, on the one hand through the contact resistance detection circuitry contact resistance of detection switch contact, on the other hand through the temperature of contact temperature sensor detection switch contact surface, detect the calorific capacity of switch contact, signal processing circuit judges the state of switch contact according to contact resistance and the dual detection signal of switch contact surface temperature, as long as any one of contact resistance and the switch contact surface temperature who detects satisfies the predetermined condition can accurately reliably detect that there is contact failure or hidden danger that produces contact failure in the switch contact, and then control unit can accurately, timely carry out early warning, report to the police, and carry out automatic protection action such as trip control etc. accordingly, thereby avoid switch contact failure and arouse the power consumption accident to the utmost extent, such as: short circuit, fire, power outage, etc. Except can avoid contact failure to miss the inspection to the at utmost, the utility model discloses an intelligent control switch can also eliminate effectively and detect the erroneous judgement that little resistance method leads to because of reasons such as circuit system unstability, avoids causing the wrong report police, has also significantly reduced the needs of artifical patrol, has saved the cost of labor.
The utility model provides a contact resistance detection circuitry adopts two sets of current transformer and voltage transformer's design at the front end of switch contact and rear end, is favorable to improving the accuracy to being surveyed switch contact resistance measurement.
Drawings
Fig. 1 is the structure diagram of an embodiment of the intelligent control switch of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Referring to fig. 1, in an embodiment, an intelligent control switch with contact temperature detection comprises a contact temperature sensor T, a contact resistance detection circuit, a signal processing circuit and a control unit, wherein the contact temperature sensor T is arranged on a switch contact of a switch K to be detected and is used for detecting the temperature of the surface of the switch contact, the contact resistance detection circuit is used for detecting the contact resistance of the switch contact, the contact resistance detection circuit comprises two sets of current transformers a1 and a2 and voltage transformers B1 and B2, one set of the current transformer a1 and the voltage transformer B1 is arranged at the front end of the switch contact, the other set of the current transformer a2 and the voltage transformer B2 is arranged at the rear end of the switch contact, and the two sets of the current transformers a1 and a2 and the voltage transformers B1 and B2 respectively detect current and voltage signals at corresponding positions, the contact type temperature sensor T and the signal output ends of the contact resistance detection circuit are both connected with the signal processing circuit, the output end of the signal processing circuit is connected with the control unit, the signal processing circuit judges the state of the switch contact according to the double detection signals of the contact resistance and the surface temperature of the switch contact, and the control unit is used for controlling early warning, alarming or executing preset safety control actions according to the information output by the signal processing circuit.
During operation, this intelligent control switch detects the contact resistance of switch contact through contact resistance detection circuitry on the one hand, on the other hand detects the temperature on switch contact surface through contact temperature sensor T, survey the calorific capacity of switch contact, signal processing circuit judges according to the dual detection state of the contact resistance of switch contact and switch contact surface temperature, as long as arbitrary person satisfies the preset condition can accurately reliably detect out that there is contact failure or has hidden danger that produces contact failure in the switch contact, and then the control unit can accurately, in time carry out early warning, report to the police, and carry out automatic protection action such as trip control etc. in view of the above, thereby furthest avoids switch contact failure and arouses the power consumption accident, if: short circuit, fire, power outage, etc. Except can avoid contact failure to miss the inspection to the at utmost, the utility model discloses an intelligent control switch can also eliminate effectively and detect the erroneous judgement that little resistance method leads to because of reasons such as circuit system unstability, avoids causing the wrong report police, has also significantly reduced the needs of artifical patrol, has saved the cost of labor. Additionally, the utility model provides a contact resistance detection circuitry adopts two sets of current transformer and voltage transformer's at the front end of switch contact and rear end design, is favorable to improving the accuracy to being surveyed switch contact resistance measurement.
In various embodiments, the contact temperature sensor T may be a platinum resistance temperature sensor, a digital temperature sensor, a thermocouple sensor, or the like.
In a preferred embodiment, the signal processing circuit comprises a plurality of operational amplifiers, an analog-to-digital converter and a data processing unit, the current transformers a1, a2, the voltage transformers B1, B2 and the contact temperature sensor T are each respectively connected to an input terminal of an operational amplifier, an output terminal of each operational amplifier is connected to an input terminal of the analog-to-digital converter, and an output terminal of the analog-to-digital converter is connected to the data processing unit.
In a preferred embodiment, the data processing unit is a micro control unit.
In a preferred embodiment, the intelligent control switch further comprises a display unit connected with the signal processing circuit and used for displaying the detection information of the switch contact.
In a preferred embodiment, the intelligent control switch further comprises a communication part connected with the signal processing circuit, and the communication part is used for sending the detection information to a monitoring terminal and/or networking to realize cross-regional monitoring management.
In a specific embodiment, the monitoring terminal is a mobile phone of a user or a computer of a management center.
In some embodiments, the intelligent control switch may further comprise a storage device connected to the signal processing circuit for storing the detection information and/or preset information related to the determination.
In different embodiments, the intelligent control switch may be a switch in a single-phase or three-phase ac system, and may also be a switch in a dc system.
The features and operation of particular embodiments of the present invention are further described below in conjunction with the following figures.
The intelligent control switch of one specific embodiment comprises a contact temperature sensor, a current transformer, a voltage transformer, an operational amplifier, an analog-to-digital converter, a data processing unit, a display unit, a control unit, other peripheral devices (such as keys), a control unit and a communication part, wherein the circuits form a switch contact temperature detection part and a switch contact resistance detection part to monitor the operation condition of the switch in real time.
Switch contact temperature detection part
A contact temperature sensor (such as a platinum resistance temperature sensor or a digital temperature sensor) arranged on a switch contact obtains temperature data on the surface of the switch contact, the temperature data is transmitted to an operational amplifier, the operational amplifier processes the temperature data and then transmits the temperature data to an analog-to-digital converter (ADC), the ADC transmits the temperature data to a data processing unit (such as a Micro Control Unit (MCU)) for data analysis, actual detection temperature is obtained, the actual detection temperature is compared with a set temperature value, and a comparison result is transmitted to a control unit for next control processing. The control unit such as a CPU outputs an alarm signal, controls the action of a relay, trips and the like through an IO port of the CPU and a driving circuit. Meanwhile, the data processing unit can send the detection result to the display unit for displaying, and can also transmit the detection result to a PC (personal computer) of the management center through the communication part via a network for displaying and recording.
Switch contact resistance detection part
The two groups of current transformers and voltage transformers are arranged, one group is arranged at the front end of a switch contact, the other group is arranged at the rear end of the switch contact, the two groups of current transformers and voltage transformers respectively detect current signals and voltage signals of corresponding positions and send the current signals and the voltage signals to corresponding operational amplifiers, the operational amplifiers process the detected current signals and voltage signals, send the processed current signals and voltage signals to an analog-to-digital converter (ADC), and convert the analog signals into digital signals to a data processing unit such as a Micro Control Unit (MCU). And the MCU is used for carrying out resistance calculation on the detected current and voltage, comparing and analyzing the calculated resistance with a preset resistance value which is stored in advance, and sending a comparison result to the control unit for carrying out the next control processing. The control unit such as a CPU outputs an alarm signal, controls the action of a relay, trips and the like through an IO port of the CPU and a driving circuit. Meanwhile, the data processing unit can send the detection result to the display unit for displaying, and can also transmit the detection result to a PC (personal computer) of the management center through the communication part via a network for displaying and recording.
In the working process, when the surface temperature of the switch contact is detected to reach a preset temperature value, or when the contact resistance of the switch contact is detected to meet a preset condition, the system performs corresponding processing, such as early warning, alarming, tripping control, automatic protection and the like. All data can be stored by local devices connected to the data processing unit or sent to a management center for data storage through a network.
In addition, the remote monitoring, data retention and switching-on and switching-off of the remote operation switches of a plurality of switches can be realized through the control of a networked management center.
In addition, the system can preset the closing times and the using time of the switch and write the closing times and the using time into a system memory, and when the preset closing times of the switch are reached, a user is reminded to maintain so as to prolong the service life of the switch.
Use the utility model discloses an intelligent control switch founds a system, can realize that automatic switch patrols and examines, switch number of times, long-range combined floodgate, shut brake, early warning, warning temperature set for and the routine maintenance record. May be operated or consulted by computer software. Multiple (unlimited number) switches may be monitored simultaneously. The system can be networked through networking (wired and wireless), and then a management center or a mobile phone APP carries out supervision. The data can also be uploaded to a cloud server, and cross-region and cross-domain monitoring management is achieved. Of course, stand-alone (single non-networked) operation is also possible.
Use the utility model discloses an intelligent control switch can network and form the networking system of transregional, cross-domain, can carry out scene or remote monitoring and control to single, a plurality of or infinite position. The system sends an alarm signal by monitoring of the intelligent control switch, and can trigger the management center, the mobile phone APP, the short message sending and the mobile phone dialing of the manager to inform the monitoring manager in various modes.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific/preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, a plurality of alternatives or modifications can be made to the described embodiments without departing from the concept of the invention, and these alternatives or modifications should be considered as belonging to the protection scope of the invention.

Claims (9)

1. An intelligent control switch with contact temperature detection is characterized by comprising a contact temperature sensor, a contact resistance detection circuit, a signal processing circuit and a control unit, wherein the contact temperature sensor is arranged on a detected switch contact and used for detecting the temperature of the surface of the switch contact, the contact resistance detection circuit is used for detecting the contact resistance of the switch contact and comprises two groups of current transformers and voltage transformers, one group of the current transformers and the voltage transformers are arranged at the front end of the switch contact, the other group of the current transformers and the voltage transformers are arranged at the rear end of the switch contact, the two groups of the current transformers and the voltage transformers respectively detect current and voltage signals at corresponding positions, and the signal output ends of the contact temperature sensor and the contact resistance detection circuit are connected with the signal processing circuit, the output end of the signal processing circuit is connected with the control unit, the signal processing circuit is used for judging the running state of the switch contact according to a contact resistance and switch contact surface temperature double detection signal, and the control unit is used for controlling early warning, alarming or executing a preset safety control action according to information output by the signal processing circuit.
2. The intelligent control switch with contact temperature sensing of claim 1, wherein the contact temperature sensor is a platinum resistance temperature sensor, a digital temperature sensor, or a thermocouple sensor.
3. The intelligent control switch with contact temperature sensing of claim 1, wherein said signal processing circuit comprises a plurality of operational amplifiers, an analog-to-digital converter and a data processing unit, said current transformer, said voltage transformer and said contact temperature sensor each being connected to an input of an operational amplifier, an output of each operational amplifier being connected to an input of said analog-to-digital converter, an output of said analog-to-digital converter being connected to said data processing unit.
4. The intelligent control switch with contact temperature sensing of claim 3, wherein the data processing unit is a micro control unit.
5. The intelligent control switch with contact temperature detection according to any one of claims 1 to 4, further comprising a display unit connected to the signal processing circuit for displaying detection information of the switch contact.
6. The intelligent control switch with contact temperature detection according to any one of claims 1 to 4, further comprising a communication part connected to the signal processing circuit for transmitting detection information to a monitoring terminal and/or for networking to realize cross-regional monitoring management.
7. The intelligent control switch with contact temperature detection of claim 6, wherein the monitor terminal is a user's mobile phone or a computer of a management center.
8. The intelligent control switch with contact temperature detection of any one of claims 1 to 4, further comprising a memory device connected to said signal processing circuit for storing detection information and/or preset information related to making said determination.
9. Intelligent control switch with contact temperature detection according to any of claims 1 to 4, characterized in that said switch is a switch in a single-phase or three-phase AC system, or a switch in a DC system.
CN201920410440.2U 2019-03-28 2019-03-28 Intelligent control switch with contact temperature detection function Active CN210123456U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920410440.2U CN210123456U (en) 2019-03-28 2019-03-28 Intelligent control switch with contact temperature detection function

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Application Number Priority Date Filing Date Title
CN201920410440.2U CN210123456U (en) 2019-03-28 2019-03-28 Intelligent control switch with contact temperature detection function

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Publication Number Publication Date
CN210123456U true CN210123456U (en) 2020-03-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113447719A (en) * 2021-07-21 2021-09-28 国网河北省电力有限公司检修分公司 Detection device for contact surface resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113447719A (en) * 2021-07-21 2021-09-28 国网河北省电力有限公司检修分公司 Detection device for contact surface resistance

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