CN211452807U - Measurement device for circuit breaker mechanical characteristic based on magnetic resistance sensor - Google Patents
Measurement device for circuit breaker mechanical characteristic based on magnetic resistance sensor Download PDFInfo
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- CN211452807U CN211452807U CN201922170685.5U CN201922170685U CN211452807U CN 211452807 U CN211452807 U CN 211452807U CN 201922170685 U CN201922170685 U CN 201922170685U CN 211452807 U CN211452807 U CN 211452807U
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Abstract
The application discloses a measurement device and a measurement method for mechanical characteristics of a circuit breaker based on a magnetoresistive sensor. The measuring device for the mechanical characteristics of the circuit breaker comprises a measuring part; the measuring part comprises a magnet and a magnetoresistive sensor component; the magnetoresistive sensor component comprises at least one magnetoresistive sensor arranged along a first direction; a space is arranged between the magnet and the magnetic resistance sensor component along a second direction, and the magnet reciprocates along the magnetic resistance sensor component to realize the measurement of the mechanical property of the circuit breaker; wherein the first direction is a movement direction of the breaker link; the first direction is perpendicular to the second direction. The measuring device has a long service life.
Description
Technical Field
The application relates to a measurement device for circuit breaker mechanical characteristics based on magnetic resistance sensor belongs to high voltage circuit breaker test equipment technical field.
Background
High voltage circuit breakers are important electrical devices in electrical power systems. The mechanical characteristics of the high-voltage circuit breaker need to be tested in factory inspection, handover, regular inspection and online monitoring of the high-voltage circuit breaker. The travel-time curve and the closing and opening speed measurement of the main contact are important items in the mechanical characteristic test.
The existing travel-time curve and closing and opening speed measuring sensors are divided into a linear type and a rotating angle type in form. The linear sensor adopts a linear displacement sensor, the principle is of a potentiometer type, and the linear sensor structurally comprises two parts: the sensor comprises a static body of the sensor and a pull rod, wherein the pull rod is slidably mounted on a sliding groove of the static body of the sensor. When the sensor is used, the pull rod is fixedly connected with the connecting rod of the high-voltage circuit breaker, and the static body of the sensor is fixed on the body of the high-voltage circuit breaker through the fixed mounting bracket.
Then, in the actual testing process, because the high voltage circuit breaker closes, the vibration is very big during the separating brake, lead to the static body of sensor to take place to vibrate, and the circuit breaker connecting rod is closing, the motion track when separating brake is not complete linear motion, because be connected for the contact between the static body of sensor and the pull rod, consequently when the pull rod motion of circuit breaker connecting rod drive sensor, lead to producing the effort between the static body of pull rod and sensor (on the one hand the circuit breaker connecting rod drives the pull rod and makes incomplete linear motion, on the other hand the pull rod need do linear motion along the static body of sensor again, consequently can produce the effort that has the effect of damaging between the static body of sensor pull rod and sensor), cause the sensor to damage easily. Therefore, a sensor which is not easy to damage and is simple to install is urgently needed.
SUMMERY OF THE UTILITY MODEL
According to one aspect of the application, a measuring device for the mechanical characteristics of a circuit breaker based on a magnetic resistance sensor is provided, the measuring device comprises a magnet and the magnetic resistance sensor which are separated from each other, non-contact type relative movement is formed between the magnet and the magnetic resistance sensor, and interaction force with destructive effect does not exist between the magnet and the magnetic resistance sensor, so that the measuring device has long service life and convenient installation mode.
A measurement device for the mechanical characteristics of a circuit breaker based on a magnetoresistive sensor comprises a measurement part;
the measuring part comprises a magnet and a magnetoresistive sensor component;
the magnetoresistive sensor component comprises at least one magnetoresistive sensor arranged along a first direction;
a space is arranged between the magnet and the magnetic resistance sensor component along a second direction, and the magnet reciprocates along the magnetic resistance sensor component to realize the measurement of the mechanical characteristics of the circuit breaker;
wherein the first direction is a movement direction of the breaker link;
the first direction is perpendicular to the second direction.
Optionally, the magnet is located above the magnetoresistive sensor component; or the magnet is located below the magnetoresistive sensor component.
Optionally, the magnetoresistive sensor is plural.
Optionally, the pitch of the magneto-resistive sensors is 5-50 mm.
Optionally, the measuring part further comprises a magnet fixing member, and the magnet is fixed on the connecting rod of the circuit breaker through the magnet fixing member.
Optionally, the measuring part further comprises a circuit board on which the magneto-resistive sensor is arranged.
Optionally, the measuring part further includes a support member through which the circuit board is mounted on the body of the circuit breaker.
Optionally, the supporting element includes a magnetic resistance sensor fixing element and a mechanical arm, the magnetic resistance sensor fixing element is fixed on the body of the circuit breaker, one end of the mechanical arm is connected with the magnetic resistance sensor fixing element, and the other end of the mechanical arm is connected with the circuit board; the mechanical arm is used for universal adjustment.
Optionally, the magnet is permanent magnet steel.
Optionally, the measuring device further comprises a signal processing part electrically connected with the magnetoresistive sensor component in the measuring part for processing the output signal of the magnetoresistive sensor.
The beneficial effects that this application can produce include:
in the prior art, in a mechanical characteristic test of a high-voltage circuit breaker of 6kV or above, a stroke-time curve and closing and opening speeds of a main contact are required to be measured. The linear type sensor that uses in the mechanical properties test, the static body of its sensor is fixed on the high-voltage circuit breaker body, its pull rod is fixed on the high-voltage circuit breaker connecting rod, the static body of sensor is connected with pull rod direct contact, when the circuit breaker connecting rod is closing, when the formation incomplete linear motion orbit of separating brake, because the non-linear motion of circuit breaker connecting rod leads to the sensor pull rod to produce non-linear motion, and the sensor pull rod also need make linear motion along the track of the static body of sensor simultaneously, can produce destructive power at the connecting portion of the static body of pull rod and sensor like this, cause the sensor to damage easily.
The application provides a measuring device for mechanical characteristics of a circuit breaker, which comprises a magnet and a magnetic resistance sensor which are separated from each other. The connecting rod of the circuit breaker drives the magnet to do linear motion, meanwhile, the magnet does linear motion along the arrangement direction of the magnetic resistance sensors, and non-contact type relative motion is formed between the magnet and the magnetic resistance sensors. When the breaker connecting rod is closing, when the incomplete linear motion is made to the separating brake (actual test process), because magnet and magnetoresistive sensor's non-contact motion, avoided among the prior art pull rod among the linear type sensor and the static body of sensor because direct contact connects and the interact power that produces to avoided the damage of this effort to the sensor, the measuring device that this application provided has longer life and convenient mounting means.
Drawings
FIG. 1 is a device for measuring mechanical properties of a circuit breaker according to one embodiment of the present disclosure;
fig. 2 is a schematic view of an assembly structure of a measuring device mounted on a circuit breaker according to an embodiment of the present disclosure.
List of parts and reference numerals:
100 a measuring part; 101 a magnet; 102 a magnetoresistive sensor;
103 a magnet holder; 104 a circuit board; 105 a robotic arm;
106 a magnetoresistive sensor mount; 107 magnetoresistive sensor output lines;
200 a signal processing section; 201A/D converter; 202 a CPU processor;
1 link of circuit breaker; 2 a body of the circuit breaker; 3 a crank arm of the circuit breaker;
4 breaker operating mechanism drive shaft.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the terms "some possible implementations," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
A measuring device for mechanical characteristics of a circuit breaker comprises a measuring part; the measuring part comprises a magnet and a magnetoresistive sensor component; the magnetoresistive sensor component comprises at least one magnetoresistive sensor arranged along the first direction; a space is arranged between the magnet and the magnetic resistance sensor component along a second direction, and the magnet reciprocates along the magnetic resistance sensor component to realize the measurement of the mechanical property of the circuit breaker; the first direction is the movement direction of the breaker connecting rod, and the first direction is perpendicular to the second direction.
Concretely, a measuring device for mechanical characteristics of a circuit breaker comprises a measuring part; the measuring part comprises a magnet and a magneto-resistive sensor assembly; the magnet is fixed on a connecting rod of the circuit breaker so that the magnet moves along a first direction along with the connecting rod; the magnetic resistance sensor assembly comprises at least one magnetic resistance sensor arranged along a first direction, and the magnetic resistance sensor is arranged on the body of the circuit breaker; a space is arranged between the magnet and the magnetic resistance sensor along the second direction so that the magnet can reciprocate along the arrangement direction of the magnetic resistance sensor.
Specifically, a magnetoresistive sensor is an integrated circuit that measures the magnetic induction of a magnetic field, the output voltage of which varies as the magnetic induction of an external magnetic field varies (the magnitude of the potential depends on the rate at which the magnetic flux varies). A plurality of magnetoresistive sensors are aligned at a distance and a magnet is moved over the magnetoresistive sensors. The computer analyzes and calculates the collected output voltage of each magnetic resistance sensor to obtain the movement stroke of the magnet, and further obtain the movement stroke of the connecting rod of the circuit breaker.
The strength of the magnet field affects the selection of the distance between the magnet and the magnetoresistive sensor. The greater the magnetic field strength of the magnet, the greater the allowable distance of the magnet from the magnetoresistive sensor. Magnets of different magnetic field strengths may be selected as desired.
In this application, the magnet is in communication with the magnetoresistive sensor through a magnetic field. This is a non-contact displacement measurement method.
Since the magnetic force lines outside the magnet are emitted from the N pole to the S pole, the NS pole of the magnet is longitudinally arranged in the application, and the connection direction of the NS pole is a second direction which is perpendicular to the arrangement direction of the magnetoresistive sensors.
First direction in this application is the direction of motion of circuit breaker connecting rod, and linear motion is made to the connecting rod.
In the application, when only one magnetic resistance sensor is arranged, the magnetic resistance sensor is suitable for a vacuum circuit breaker with small stroke, and the stroke is only about 10 mm.
In the present application, the relative position of the magnet and the magnetoresistive sensor is not strictly limited as long as the magnetoresistive sensor can receive the change of the ambient magnetic field caused by the movement of the magnet.
In one possible embodiment, the magnet is positioned above the magnetoresistive sensor component, as shown in FIG. 2. The magnet is fixed below the breaker connecting rod, and the magnetic resistance sensor is located below the magnet.
In another possible embodiment, the magnet is located below the magnetoresistive sensor component. The magnet is fixed above the breaker connecting rod, and the magnetic resistance sensor is positioned above the magnet.
In the present application, the number of the magnetoresistive sensors is not strictly limited, and those skilled in the art can select the number according to actual needs.
Preferably, the magnetoresistive sensor is plural.
In the present application, the number of the magnetoresistive sensors is determined according to the size of the measuring stroke and the measuring resolution, and is not particularly limited. When the magnetoresistive sensor is plural, the measurement stroke can be increased.
Preferably, the magnetoresistive sensors are arranged at equal intervals.
Optionally, the measuring part further comprises a magnet fixing member, and the magnet is fixed on the connecting rod of the circuit breaker through the magnet fixing member.
Specifically, in a specific embodiment, the magnet fixing piece is a V-shaped clamp, specifically, the magnet fixing piece comprises a bolt and a folding frame with an opening, the bolt is fixed on one side wall of the folding frame, the inner side surface of the folding frame opposite to the bolt is inwards concave to form a V-shaped inner concave surface, one end of the bolt is connected with a V-shaped member, and the V-shaped member is matched with the V-shaped inner concave surface of the folding frame so that the magnet fixing piece can be fixed on a round or square connecting rod. The magnet adheres to or adsorbs the surface of folding type frame, and folding type frame passes through bolt detachably to be fixed on the high-voltage circuit breaker connecting rod.
Optionally, the measuring part further comprises a circuit board, and the magnetic resistance sensor is arranged and fixed on the circuit board.
Specifically, in a specific embodiment, the circuit board is an integral circuit board, the magnetoresistive sensors are sequentially arranged on the circuit board and electrically connected with the circuit board, and the circuit board is connected with the output lines of the magnetoresistive sensors for outputting the electrical signals in the magnetoresistive sensors.
Optionally, the measuring part further comprises a support member through which the circuit board is mounted on the body of the circuit breaker.
Specifically, in one example, the support member includes a magnetoresistive sensor fixing member and a connecting rod, the magnetoresistive sensor fixing member is fixed on the body of the circuit breaker, one end of the connecting rod is connected with the magnetoresistive sensor fixing member, the other end of the connecting rod is connected with the circuit board, and the magnetoresistive sensor fixing member and the connecting rod may be of an integral structure or may be detachably connected. The structure of the magnetoresistive sensor mount is similar to that of the magnet mount and will not be described in detail here.
The magnetoresistive sensor mount is preferably fixed to a suitable plane of the body of the circuit breaker to achieve a stable connection.
In yet another example, the support member includes a magnetic resistance sensor fixing member fixed to the body of the circuit breaker, and a mechanical arm having one end connected to the magnetic resistance sensor fixing member and the other end connected to the circuit board, the mechanical arm being universally adjustable for adjusting a distance between the magnet and the magnetic resistance sensor.
The arm in this example can carry out universal rotation, drives circuit board and the motion of magnetoresistive sensor be connected with the arm to the relative position of adjustment magnetoresistive sensor and magnet realizes better test effect.
Optionally, the magnet is permanent magnet steel.
Optionally, the measuring device further comprises a signal processing part electrically connected with the magnetoresistive sensor component in the measuring part for processing the output signal of the magnetoresistive sensor.
Specifically, the signal processing section includes an a/D converter and a CPU processor. The A/D converter is electrically connected to the magnetoresistive sensor through the magnetoresistive sensor output line on the one hand, and the A/D converter is connected to the CPU processor on the other hand.
The measurement method of the measurement device for the mechanical characteristics of the circuit breaker based on the magnetoresistive sensor provided by the application is described below;
when the mechanical characteristics of the circuit breaker are measured, the magnet is fixed on a connecting rod of the circuit breaker, and the magnetic resistance sensor assembly is fixed on a body of the circuit breaker;
the mechanical characteristics of the circuit breaker comprise a stroke-time curve, a closing speed and an opening speed.
Example 1
Fig. 1 is a schematic structural diagram of a measuring device for measuring mechanical characteristics of a circuit breaker in this embodiment, and fig. 2 is a schematic structural diagram of an assembly of the measuring device in this embodiment mounted on the circuit breaker. The present embodiment will be described below with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the device for measuring the mechanical characteristics of the circuit breaker includes a measuring portion 100, the measuring portion 100 includes a magnet 101 and a magnetoresistive sensor assembly, the magnet 101 is fixed below a link 1 of the circuit breaker by a magnet fixing member 103, the magnetoresistive sensor assembly includes a plurality of magnetoresistive sensors 102 uniformly arranged along a first direction, the magnetoresistive sensors 102 are connected to a circuit board 104, the magnetoresistive sensors 102 are located below the magnet 101, the circuit board 104 is connected to one end of a mechanical arm 105, the other end of the mechanical arm 105 is connected to a magnetoresistive sensor fixing member 106, the magnetoresistive sensor fixing member 106 is fixed on a body 2 of the circuit breaker, and one end of the circuit board 104 leads out a magnetoresistive sensor output line 107.
The measuring device of the mechanical characteristic of the circuit breaker further comprises a signal processing part 200, and the signal processing part 200 comprises an A/D converter 201 and a CPU processor 202. The magnetoresistive sensor output line 107 is connected to an a/D converter 201, and the a/D converter is connected to a CPU processor 202.
Referring to fig. 2, the link 1 of the circuit breaker is connected to the crank arm 3 of the circuit breaker, the crank arm 3 of the circuit breaker is connected to the driving shaft 4 of the circuit breaker operating mechanism, and the end of the link 1 away from the crank arm 3 is connected to the main contact of the circuit breaker (not shown).
When the link 1 of the circuit breaker is closed or opened, the track of the link 1 is not completely linear motion, and the link 1 drives the magnet 101 to move together. When the magnet 101 moves, the change rate of the magnetic flux passing through the magnetic resistance sensor 102 changes, so that different potential signals are output and processed by the A/D converter 201 and the CPU processor 202, and a stroke-time curve and switching-on and switching-off speeds are obtained. Due to the fact that the magnet 101 and the magneto-resistive sensor 102 are in non-contact, the non-complete linear motion of the connecting rod 1 does not cause interaction force to be generated between the magnet 101 and the magneto-resistive sensor 102, and therefore the long service life of the mechanical characteristic measuring device of the circuit breaker is achieved.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (9)
1. A measurement device for the mechanical characteristics of a circuit breaker based on a magnetoresistive sensor is characterized by comprising a measurement part;
the measuring part comprises a magnet and a magnetoresistive sensor component;
the magnetoresistive sensor component comprises at least one magnetoresistive sensor arranged along a first direction;
a space is arranged between the magnet and the magnetic resistance sensor component along a second direction, and the magnet reciprocates along the magnetic resistance sensor component to realize the measurement of the mechanical property of the circuit breaker;
wherein the first direction is a movement direction of the breaker link;
the first direction is perpendicular to the second direction.
2. The measurement device of claim 1, wherein the magnet is positioned above the magnetoresistive sensor component; or the magnet is located below the magnetoresistive sensor component.
3. The measurement device of claim 1, wherein the magnetoresistive sensor is plural.
4. A measuring device according to claim 3, characterized in that the pitch of the magneto-resistive sensors is 5-50 mm.
5. The measuring device according to claim 1, wherein the measuring portion further comprises a magnet holder, and the magnet is fixed to the link of the circuit breaker by the magnet holder.
6. The measurement device of claim 1, wherein the measurement portion further comprises a circuit board on which the magnetoresistive sensors are arranged.
7. The measuring device of claim 6, wherein the measuring portion further comprises a support by which the circuit board is mounted on a body of a circuit breaker;
the supporting piece comprises a magnetoresistive sensor fixing piece and a mechanical arm, the magnetoresistive sensor fixing piece is fixed on the body of the circuit breaker, one end of the mechanical arm is connected with the magnetoresistive sensor fixing piece, and the other end of the mechanical arm is connected with the circuit board;
the mechanical arm is used for universal adjustment.
8. A measuring device according to claim 1, wherein the magnet is permanent magnet steel.
9. The measurement device of claim 1, further comprising a signal processing section electrically connected to a magnetoresistive sensor component in the measurement section for processing an output signal of the magnetoresistive sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170685.5U CN211452807U (en) | 2019-12-06 | 2019-12-06 | Measurement device for circuit breaker mechanical characteristic based on magnetic resistance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922170685.5U CN211452807U (en) | 2019-12-06 | 2019-12-06 | Measurement device for circuit breaker mechanical characteristic based on magnetic resistance sensor |
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| Publication Number | Publication Date |
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| CN211452807U true CN211452807U (en) | 2020-09-08 |
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| CN201922170685.5U Active CN211452807U (en) | 2019-12-06 | 2019-12-06 | Measurement device for circuit breaker mechanical characteristic based on magnetic resistance sensor |
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