Electric power measurement ammeter based on multi-sensor fusion

Abstract

The invention discloses an electric power measurement ammeter based on multi-sensor fusion, and relates to the technical field of electric power measurement. According to the invention, the measuring conducting rods are connected in series in a circuit, and the electronic offset is detected by utilizing the nearby conducting plates and electrode strips through the magnetic field change generated by the measuring conducting rods, so that the current value is obtained in real time. Meanwhile, the auxiliary measuring motor drives the conductive disc and the friction ring to generate potential difference, and laser and a camera sensor are combined to monitor shaking of the permanent magnet, so that quick response to transient current change is realized. The detection modules verify each other, and the limitation of a traditional single detection mode is overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power measurement, and in particular to an electric power measurement meter based on multi-sensor fusion. Background Art

[0002] At present, most common electric power measurement meters on the market use a single sensor or a single detection principle. For example, they only use the magnetic induction principle to collect magnetic field changes around the measuring conductive rod to calculate the current, and then estimate the power by combining the voltage value. This traditional technology has many defects: first, the single detection method lacks cross-validation and is easily affected by factors such as the environment and sensor aging, resulting in reduced measurement accuracy; second, the traditional design does not respond sufficiently to instantaneous current shocks and cannot capture load mutations in time; in addition, the installation method is fixed and the structure is single, which makes it difficult to adapt to the diversity of different electrical boxes and installation environments. Summary of the invention

[0003] In order to overcome the defects of the above-mentioned prior art, the present invention provides the following technical solutions: an electric power measurement meter based on multi-sensor fusion, comprising two side support panels, the two side support panels are fixedly connected by a plurality of fixed connecting rods, a measuring conductive rod is inserted and matched through the middle of the two side support panels, and both ends of the measuring conductive rod are provided with wire fixing heads for connecting with external wires; a base plate is fixedly installed on the fixed connecting rod, a supporting shaft sleeve is fixedly installed on the base plate, a conductive brush support frame is fixedly installed on the top of the supporting shaft sleeve, a conductive rotating shaft is arranged at the axial position inside the supporting shaft sleeve, an insulating ceramic shaft sleeve is arranged on the outer surface rotation sleeve of the conductive rotating shaft, and the insulating ceramic shaft sleeve is arranged between the outer surface of the conductive rotating shaft and the inner wall of the supporting shaft sleeve, so that the supporting shaft sleeve and the conductive rotating shaft are insulated; a measuring conductive disk is fixedly installed on the top of the conductive rotating shaft, a friction conductive ring is fixedly arranged at the edge position of the circumference of the measuring conductive disk, and the friction conductive ring and a plurality of conductive brushes fixed on the conductive brush support frame are all conductively slidably matched, wherein the symmetry plane in the thickness direction of the measuring conductive disk is parallel to and intersects with the axis of the measuring conductive rod.

[0004] Preferably, an auxiliary measuring motor is fixedly mounted on the lower surface of the base plate, wherein the bottom end of the conductive rotating shaft passes through the bottom of the base plate, and a driven disk is fixedly mounted on the bottom end of the conductive rotating shaft, and the driven disk and the output shaft of the auxiliary measuring motor are coupled through a transmission belt.

[0005] Preferably, two parallel ceramic sheet brackets are fixedly sleeved on the outer surface of the measuring conductive rod, and two parallel ceramic sheets are fixedly installed between the two ceramic sheet brackets, wherein the ceramic sheets and the ceramic sheet brackets are arranged vertically.

[0006] Preferably, a measuring conductive plate is fixed between the opposite surfaces of the two ceramic sheets, short side electrode strips are conductively fixed on both wide sides of the measuring conductive plate, long side electrode strips are conductively fixed on both long sides of the measuring conductive plate, and a DC voltage is applied between the two short side electrode strips.

[0007] Preferably, a shading support shell is provided at the edge position fixing sleeve between the two side support panels, a permanent magnet is provided on the inner side of the shading support shell, the permanent magnet is elastically arranged on the spring swing frame through a spring, the spring swing frame is rotatably arranged on the support shaft rod, the support shaft rod is fixed on the fixed connecting rod, and a first reflective sheet is fixed on the side of the permanent magnet.

[0008] Preferably, a multi-legged bracket is rotatably sleeved on the supporting shaft rod, and the multi-legged bracket is fixedly connected to the spring swing frame via a synchronous sleeve; wherein a camera sensor, a second reflector, a laser generator and a third reflector are fixedly mounted on the multi-legged bracket.

[0009] Preferably, the light emitted by the laser generator is reflected by the first reflective sheet on the permanent magnet to the second reflective sheet, and the second reflective sheet reflects the light to the camera sensor through the third reflective sheet.

[0010] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention directly reflects the current size by setting a conductive plate and an electrode strip near the measuring conductive rod, using the potential difference generated by the movement of electrons in the magnetic field, and then combining the potential signal generated by the conductive disk driven by the auxiliary measuring motor and the friction conductive ring, thereby realizing multi-channel detection of the current. After the multi-sensor data is fused, they can verify and compensate for the deviation, so that the consistency of the output of each sensor is greatly improved when the instantaneous load changes, thereby ensuring that the power measurement value is more accurate and reliable, and overcoming the error problem caused by environmental interference or signal noise of a single sensor; (2) The present invention uses three sensors with different principles of magnetic field measurement, rotational induction and optical detection to work simultaneously. When any of the detection units deviates due to local interference or sensor aging, other detection units can be supplemented and cross-verified in time, thereby forming a redundant protection mechanism. In this way, even in the case of sudden load changes or external electromagnetic interference, the system can still capture and correct abnormal data in real time, greatly enhancing the stability and safety of the overall measurement system; (3) The laser generator and camera sensor provided in the present invention can quickly reflect the instantaneous increase of current by capturing the tiny shake of the permanent magnet under the change of magnetic field, so that the system has extremely high sensitivity and response speed to sudden load increase, instantaneous impact and other situations, thereby providing timely and reliable basis for power grid protection and equipment failure warning; (4) The measuring conductive rod and permanent magnet used in the present invention are both flexible to install, and the rotating fixed structure and shading support shell design enable the meter to adapt to a variety of installation environments and electrical box structures. Whether the conductive rod is placed vertically or installed in other forms, the coordinated work between the sensors can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the light-shielding support shell structure of the present invention.

[0012] Figure 2 It is a schematic diagram of the internal structure of the light-shielding support shell of the present invention.

[0013] Figure 3 This is a schematic diagram of the structure of the measuring conductive plate of the present invention.

[0014] Figure 4 It is a structural schematic diagram of the multi-legged bracket of the present invention.

[0015] Figure 5 It is a structural schematic diagram of the driven disk of the present invention.

[0016] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point A in the middle.

[0017] Figure 7 It is a structural schematic diagram of the conductive brush support frame of the present invention.

[0018] In the figure: 101-measuring conductive rod; 102-ceramic plate; 103-ceramic plate bracket; 104-measuring conductive plate; 105-long side electrode strip; 106-short side electrode strip; 107-supporting shaft rod; 108-spring swing frame; 109-spring; 110-permanent magnet; 111-first reflector; 112-synchronizing sleeve; 113-multi-leg bracket; 114-camera sensor; 115-second reflector; 116-laser generator; 1 17-base plate; 118-auxiliary measuring motor; 119-transmission belt; 120-driven disk; 121-conductive rotating shaft; 122-insulating ceramic bushing; 123-support bushing; 124-conductive brush support frame; 125-conductive brush; 126-friction conductive ring; 127-measuring conductive disk; 128-light-shielding support shell; 129-side support panel; 130-fixed connecting rod; 131-wire fixing head; 132-third reflective sheet. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-7 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0020] The present invention provides an electric power measurement meter based on multi-sensor fusion, comprising two side support panels 129, the two side support panels 129 are fixedly connected by a plurality of fixed connecting rods 130, the middle of the two side support panels 129 is penetrated and plugged with a measuring conductive rod 101, and both ends of the measuring conductive rod 101 are provided with a wire fixing head 131 for connecting with an external wire; a base plate 117 is fixedly installed on the fixed connecting rod 130, a support shaft sleeve 123 is fixedly installed on the base plate 117, a conductive brush support frame 124 is fixedly installed on the top of the support shaft sleeve 123, and a conductive rotating shaft 131 is provided at the axis position inside the support shaft sleeve 123 21, the outer surface of the conductive rotating shaft 121 is rotatably sleeved with an insulating ceramic sleeve 122, which is arranged between the outer surface of the conductive rotating shaft 121 and the inner wall of the supporting sleeve 123, so that the supporting sleeve 123 and the conductive rotating shaft 121 are insulated; a measuring conductive disc 127 is fixedly installed at the top of the conductive rotating shaft 121, and a friction conductive ring 126 is fixedly sleeved at the edge position of the circumference of the measuring conductive disc 127, and the friction conductive ring 126 and the multiple conductive brushes 125 fixed on the conductive brush support frame 124 are all conductively slidably matched, wherein the symmetry plane in the thickness direction of the measuring conductive disc 127 is parallel to and intersects with the axis of the measuring conductive rod 101. An auxiliary measuring motor 118 is fixedly installed on the lower surface of the base plate 117, wherein the bottom end of the conductive rotating shaft 121 penetrates to the bottom of the base plate 117, and a driven disc 120 is fixedly installed at the bottom end of the conductive rotating shaft 121, and the driven disc 120 and the output shaft of the auxiliary measuring motor 118 are matched through a transmission belt 119. Two parallel ceramic sheet brackets 103 are fixedly sleeved on the outer surface of the measuring conductive rod 101, and two parallel ceramic sheets 102 are fixedly installed between the two ceramic sheet brackets 103, wherein the ceramic sheet 102 and the ceramic sheet bracket 103 are arranged vertically. A measuring conductive plate 104 is fixedly arranged between the opposite surfaces of the two ceramic sheets 102, and short side electrode strips 106 are conductively fixed on the two wide sides of the measuring conductive plate 104, and long side electrode strips 105 are conductively fixed on the two long sides of the measuring conductive plate 104, wherein a DC voltage is applied between the two short side electrode strips 106. A shading support shell 128 is fixedly sleeved at the edge position between the two side support panels 129, and a permanent magnet 110 is arranged on the inner side of the shading support shell 128. The permanent magnet 110 is elastically arranged on the spring swing frame 108 through the spring 109. The spring swing frame 108 is rotatably arranged on the supporting shaft rod 107, and the supporting shaft rod 107 is fixed on the fixed connecting rod 130. The side of the permanent magnet 110 is fixed with a first reflective sheet 111.A multi-legged bracket 113 is rotatably sleeved on the support shaft rod 107, and the multi-legged bracket 113 is fixedly connected to the spring swing frame 108 through a synchronous sleeve 112; wherein a camera sensor 114, a second reflector 115, a laser generator 116 and a third reflector 132 are fixedly mounted on the multi-legged bracket 113. The light emitted by the laser generator 116 is reflected to the second reflector 115 through the first reflector 111 on the permanent magnet 110, and the second reflector 115 reflects the light to the camera sensor 114 through the third reflector 132.

[0021] The working principle of an electric power measurement meter based on multi-sensor fusion disclosed by the present invention is as follows: a measuring conductive rod 101 is connected in series in a circuit through two wire fixing heads 131 (rotate the screws on the wire fixing head 131 to fix one end of the wire to the wire fixing head 131). When in use, the current in the measuring conductive rod 101 will change according to the size of the load. The change in the current of the measuring conductive rod 101 will cause the magnetic field near the measuring conductive rod 101 to change. The change in the magnetic field of the measuring conductive rod 101 will cause (alternating current will change the direction of the magnetic field and the magnitude of the magnetic field strength, and direct current will change the magnitude of the magnetic field strength). Due to the setting of the measuring conductive plate 104, the measuring conductive plate 104 is located near the surface of the measuring conductive rod 101. Therefore, the magnetic field generated by the measuring conductive rod 101 will pass through the measuring conductive plate 104. At this time, a DC voltage is applied to the two short-side electrode strips 106. The electrons will move from one of the short-side electrode strips 106 to the other short-side electrode strip 106. During the movement, the electrons will pass through the measuring conductive plate 104. Since the measuring conductive plate 104 is in a magnetic field, the electrons will deviate in the direction of the two long-side electrode strips 105 when moving. The amount of the offset is proportional to the strength of the magnetic field. The greater the offset, the greater the potential difference between the two long-side electrode strips 105. Therefore, by detecting the potential difference between the two long-side electrode strips 105, the intensity of the current in the measuring conductive rod 101 can be determined (combined with the power supply voltage, the power can be obtained).

[0022] At the same time, the auxiliary measuring motor 118 is started periodically, and the output shaft of the auxiliary measuring motor 118 drives the driven disk 120 to rotate through the transmission belt 119. The rotation of the driven disk 120 will drive the conductive rotating shaft 121 to rotate, and the rotation of the conductive rotating shaft 121 will drive the measuring conductive disk 127 to rotate. The measuring conductive disk 127 rotates synchronously with the friction conductive ring 126. The friction conductive ring 126 cuts the magnetic field generated by the measuring conductive rod 101 while rotating. Therefore, a potential difference is generated between the center of the measuring conductive disk 127 (that is, the conductive rotating shaft 121 connected thereto) and the friction conductive ring 126. Specifically, it is only necessary to measure the potential difference between the conductive brush 125 and the conductive rotating shaft 121, because the conductive brush 125 and the friction conductive ring 126 are conductively matched, the friction conductive ring 126 and the measuring conductive disk 127 are conductively matched, and the center of the measuring conductive disk 127 and the conductive rotating shaft 121 are conductively matched. Under the premise that the rotation speed of the conductive disk 127 remains unchanged, the potential difference between the conductive brush 125 and the conductive rotating shaft 121 is proportional to the strength of the magnetic field around the conductive rod 101, and the strength of the magnetic field of the conductive rod 101 is proportional to the current passing through it, which can be used to verify whether the current passing through the conductive rod 101 is accurate (corresponding to the power size).

[0023] When the current passing through the measuring conductive rod 101 increases instantly, the surrounding magnetic field increases instantly. At this time, the permanent magnet 110 will shake under the action of the magnetic field (the permanent magnet 110 is rotatably mounted on the supporting shaft rod 107 to facilitate the overall installation, so that the shading support housing 128 can be installed and fixed on the required electrical box at more angles, such as when the measuring conductive rod 101 is placed vertically). The light emitted by the laser generator 116 will be reflected by the first reflector 111, the second reflector 115, and the third reflector 132 to the camera sensor 114. The camera sensor 114 will receive the light and record the change of the light. If the light The line shakes (the displacement and speed of the shaking need to be considered. After the light is reflected on the camera sensor 114, a light spot will be formed. If the measuring conductive rod 101 is AC, the AC will also change the position of the light spot received on the camera sensor 114. However, since the frequency of AC is generally relatively high, for example, the mains power is 50 Hz, the shaking of the permanent magnet 110 will be very frequent, and the shaking displacement is very small, so it can be ignored. At the same time, the frequency of the power supply of the measuring conductive rod 101 can also be known according to the change rate of the light spot received on the camera sensor 114), it means that the current on the measuring conductive rod 101 increases instantly.

Claims

1. An electric power measurement meter based on multi-sensor fusion, characterized in that: The device comprises two side support panels (129), the two side support panels (129) are fixedly connected via a plurality of fixed connecting rods (130), a measuring conductive rod (101) is inserted and matched through the middle of the two side support panels (129), and both ends of the measuring conductive rod (101) are provided with wire fixing heads (131) for connecting with external wires; A base plate (117) is fixedly mounted on the fixed connecting rod (130), a support sleeve (123) is fixedly mounted on the base plate (117), a conductive brush support frame (124) is fixedly mounted on the top of the support sleeve (123), a conductive rotating shaft (121) is arranged at an axial position inside the support sleeve (123), an insulating ceramic sleeve (122) is provided on the outer surface rotation sleeve of the conductive rotating shaft (121), and the insulating ceramic sleeve (122) is arranged between the outer surface of the conductive rotating shaft (121) and the inner wall of the support sleeve (123), so that the support sleeve (123) and the conductive rotating shaft (121) are insulated from each other; A measuring conductive disk (127) is fixedly mounted on the top of the conductive rotating shaft (121); a friction conductive ring (126) is fixedly sleeved at the edge of the circumference of the measuring conductive disk (127); the friction conductive ring (126) and a plurality of conductive brushes (125) fixed on the conductive brush support frame (124) are conductively slidably matched, wherein a symmetric plane in the thickness direction of the measuring conductive disk (127) is parallel to and intersects with the axis of the measuring conductive rod (101).

2. The electric power measurement meter based on multi-sensor fusion according to claim 1, characterized in that: An auxiliary measuring motor (118) is fixedly mounted on the lower surface of the base plate (117), wherein the bottom end of the conductive rotating shaft (121) passes through the bottom of the base plate (117), and a driven disk (120) is fixedly mounted on the bottom end of the conductive rotating shaft (121), and the driven disk (120) and the output shaft of the auxiliary measuring motor (118) are coupled via a transmission belt (119).

3. The electric power measurement meter based on multi-sensor fusion according to claim 2, characterized in that: Two parallel ceramic sheet supports (103) are fixedly sleeved on the outer surface of the measuring conductive rod (101), and two parallel ceramic sheets (102) are fixedly mounted between the two ceramic sheet supports (103), wherein the ceramic sheets (102) and the ceramic sheet supports (103) are arranged vertically.

4. The electric power measurement meter based on multi-sensor fusion according to claim 3 is characterized in that: A measuring conductive plate (104) is fixedly arranged between the opposite surfaces of the two ceramic sheets (102), short side electrode strips (106) are conductively fixed on both wide sides of the measuring conductive plate (104), and long side electrode strips (105) are conductively fixed on both long sides of the measuring conductive plate (104), wherein a DC voltage is applied between the two short side electrode strips (106).

5. The electric power measurement meter based on multi-sensor fusion according to claim 4, characterized in that: A light shielding support shell (128) is fixedly sleeved at the edge position between the two side support panels (129), a permanent magnet (110) is arranged on the inner side of the light shielding support shell (128), the permanent magnet (110) is elastically arranged on the spring swing frame (108) through the spring (109), the spring swing frame (108) is rotatably arranged on the support shaft rod (107), the support shaft rod (107) is fixed on the fixed connecting rod (130), and a first reflective sheet (111) is fixed on the side of the permanent magnet (110).

6. The electric power measurement meter based on multi-sensor fusion according to claim 5, characterized in that: A multi-legged bracket (113) is rotatably sleeved on the supporting shaft rod (107), and the multi-legged bracket (113) is fixedly connected to the spring swing frame (108) via a synchronous shaft sleeve (112); wherein a camera sensor (114), a second reflective sheet (115), a laser generator (116) and a third reflective sheet (132) are fixedly mounted on the multi-legged bracket (113).

7. The electric power measurement meter based on multi-sensor fusion according to claim 6, characterized in that: The light emitted by the laser generator (116) is reflected onto the second reflective sheet (115) through the first reflective sheet (111) on the permanent magnet (110), and the second reflective sheet (115) reflects the light onto the camera sensor (114) through the third reflective sheet (132).

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