Remote control type self-contact intelligent insulation resistance meter

Abstract

The utility model provides a remote control type self-contact intelligent insulation resistance meter. The remote control type self-contact intelligent insulation resistance meter comprises a wire clamp; the wire clamp is used for clamping a measured target; the clamping part of the wire clamp is made of an insulating material; a displacement mechanism is arranged on the clamping part of the wire clamp; the resistance measuring unit is mounted on the displacement mechanism so as to be in contact with or separated from a measured target under the driving of the displacement mechanism; the main control MCU unit is electrically connected with the resistance measuring unit and the displacement mechanism and is used for acquiring, processing and transmitting data measured by the resistance measuring unit and controlling the movement action of the displacement mechanism; the battery unit is electrically connected with the resistance measuring unit, the displacement mechanism and the main control MCU unit; and the wireless communication unit is connected with the main control MCU unit and is used for transmitting the data sent by the main control MCU unit to an external terminal. Unmanned operation is realized when the device is in contact with or separated from a detected target, and personal safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of insulation detection technology, especially relate to a remote control type self contact intelligent insulation resistance meter. BACKGROUND

[0002] At present, the insulation resistance meter on the market adopts a needle to contact the measured object, and then measures the insulation resistance value of the measured object, but this method is not completely applicable in the power grid environment, especially in the measurement of high-voltage line insulation, because it cannot be predicted when the power is sent, and if the insulation resistance measurement is maintained all the time, it may cause personal injury. To avoid this situation, power grid employees have conducted a number of studies, such as the Chinese invention with application number 202311217028.6 discloses a remote control type intelligent insulation resistance meter, which is divided into two parts, namely an insulation electronic measurement device and a terminal equipped with an application program; the insulation electronic measurement device is used for measuring and processing the insulation value of the power grid line, and sending the measurement data to the application program of the external terminal, and the terminal can process and display the measurement data, and can control each working module through the application program. Thus, the worker can perform line construction while remotely reading data changes or performing various operations on the insulation resistance meter through the terminal. It avoids sudden power supply during construction, ensuring the safety of workers. However, the device still has deficiencies, that is, the needle contact with the measured object still needs to be operated by a person, and if the line comes during the process of raising or lowering the needle, it will still affect personal safety. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a remote control type self contact intelligent insulation resistance meter, thereby overcoming the defect that if the line comes during the process of raising or lowering the measurement needle, it will still affect personal safety. The specific technical scheme is as follows:

[0004] A remote control type self contact intelligent insulation resistance meter, comprising:

[0005] A wire clamp; the wire clamp is used for clamping a measured target; the clamping part of the wire clamp is made of an insulating material to prevent the measured target from being electrified during clamping operation, endangering personal safety; a displacement mechanism is arranged on the clamping part of the wire clamp;

[0006] A resistance measurement unit for measuring the insulation value of the measured target; the resistance measurement unit is installed on the displacement mechanism to contact or separate from the measured target under the driving of the displacement mechanism;

[0007] A main control MCU unit electrically connected with the resistance measurement unit and the displacement mechanism, used for collecting, processing and transmitting the data measured by the resistance measurement unit and controlling the moving action of the displacement mechanism;

[0008] a battery unit connected with the resistance measurement unit, the displacement mechanism and the master MCU unit, for powering each working module; and

[0009] a wireless communication unit connected with the master MCU unit, for transmitting data sent by the master MCU unit to an external terminal.

[0010] Further, the clamping part comprises an upper clamping part and a lower clamping part; the displacement mechanism is installed on the upper clamping part.

[0011] Further, a first through hole is arranged on the upper clamping part and communicates with the upper and lower surfaces; the resistance measurement unit is in contact with or separated from the measured target through the first through hole.

[0012] Further, the first through hole is located at the center of the upper clamping part.

[0013] Further, the resistance measurement unit is located on one side of the upper clamping part.

[0014] Further, the displacement mechanism comprises a pneumatic driving structure.

[0015] Further, a display screen unit is further included; the display screen unit is connected with the master MCU unit, for displaying data transmitted by the master MCU unit.

[0016] Further, the resistance measurement unit comprises:

[0017] a push-pull voltage boosting module connected with the battery unit, for rectifying, filtering and boosting the current provided by the battery unit;

[0018] a safety protection module connected with the push-pull voltage boosting module, for limiting the voltage output by the push-pull voltage boosting module and limiting the current; and

[0019] a resistance measurement module connected with the safety protection module, the measured object and the master MCU unit, for inputting the voltage and current output by the safety protection module to the measured target, measuring the terminal voltage and terminal current of the measured object and transmitting them to the master MCU unit, and calculating the insulation resistance value of the measured target by the master MCU unit.

[0020] Further, the resistance measurement module comprises:

[0021] a voltage measurement circuit, two ends of which are connected with two ends of the measured target, for measuring the voltage of the measured target;

[0022] a sampling resistor, which is connected in series with the measured target; and

[0023] A current measurement circuit is connected in parallel across the sampling resistor for measuring the voltage across the sampling resistor.

[0024] Further, the safety protection module comprises a high-voltage current limiting module and a voltage limiting module, the high-voltage current limiting module is used for keeping the output current of the resistance measurement module in a set range, and the voltage limiting module is used for keeping the voltage of the resistance measurement module less than a limited range.

[0025] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0026] 1. In the utility model, the resistance measurement unit is fixed relative to the line direction by the wire clamp first, the wire clamp is made of insulating material to prevent electric shock caused by the line power during clamping operation, then the displacement mechanism on the wire clamp is used to realize automatic contact or separation of the resistance measurement unit and the measured target, and realizes no operation when contacting or separating from the measured target, and ensures personal safety. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0028] Figure 1 is a schematic diagram of the wire clamp clamping the measured target measurement structure of the utility model.

[0029] Figure 2 is a schematic diagram of a remote control type self-contacting intelligent insulation resistance meter system structure of the utility model.

[0030] Figure 3 is a schematic diagram of the circuit structure inside the resistance measurement unit.

[0031] Figure 4 is a schematic diagram of the circuit structure of the resistance measurement module.

[0032] Main drawing mark explanation: wire clamp 1, upper clamping part 11, lower clamping part 12, first through hole 13, displacement mechanism 2, resistance measurement unit 3, measured target 4. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0034] In the description of the utility model, it is necessary to explain that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side" are based on the orientation or positional relation shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0035] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number. If the terms "first", "second", "third" are described, they are only for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0036] In the description of the utility model, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The embodiments will be described below according to the overall structure of the utility model.

[0037] Embodiment 1

[0038] As Figures 1 to 2 It is a kind of structure schematic diagram of remote control type self-contact intelligent insulation resistance meter, including:

[0039] The wire clamp 1 is used to clamp the measured target 4;The clamping part of the wire clamp 1 is made of insulating material to prevent the measured target 4 from being dangerous to personal safety when clamping;Displacement mechanism 2 is arranged on the clamping part of the wire clamp 1;

[0040] Resistance measuring unit 3, for measuring the insulation value of measured target 4;The resistance measuring unit 3 is installed on the displacement mechanism 2, to be contacted or separated from the measured target 4 under the driving of displacement mechanism 2;Resistance measuring unit 3, for measuring the insulation value of measured target 4, and the resistance measuring unit 3 is provided with push-pull structure;

[0041] a main control MCU unit, which is electrically connected with the resistance measurement unit 3 and the displacement mechanism 2, and is used for collecting, processing and transmitting the data measured by the resistance measurement unit 3 and controlling the moving action of the displacement mechanism 2;

[0042] a battery unit, which is connected with the resistance measurement unit 3, the displacement mechanism 2 and the main control MCU unit, and is used for supplying power for each working module; and

[0043] a wireless communication unit, which is connected with the main control MCU unit, and is used for transmitting the data sent by the main control MCU unit to an external terminal.

[0044] In the utility model, the resistance measurement unit 3 is fixed relative to the line direction by the wire clamp 1 first, and the wire clamp 1 is made of insulating material to prevent electric shock caused by the line power during clamping operation, then the displacement mechanism 2 on the wire clamp 1 is used to realize the automatic contact or separation of the resistance measurement unit 3 and the measured target 4, and realizes the non-operation during contact or separation with the measured target 4, and guarantees the personal safety.

[0045] In the embodiment, the wire clamp 1 is used as the pre-fixing mechanism because the wire clamp 1 has a large opening and closing angle range, can be applied to most line sizes, and can use the mature products on the market according to the size requirement.

[0046] In the embodiment, the clamping part includes an upper clamping part 11 and a lower clamping part 12, and the displacement mechanism 2 is installed on the upper clamping part 11 and vertically installed on the upper surface of the upper clamping part 11.

[0047] In the embodiment, the upper clamping part 11 is provided with a first through hole 13 communicating the upper and lower surfaces, and the resistance measurement unit 3 is contacted or separated with the measured target 4 through the first through hole 13 under the driving of the displacement mechanism 2.

[0048] In the embodiment, the first through hole 13 is located at the center of the upper clamping part 11, so that the stress of the wire clamp 1 is more uniform, and the poor contact between the resistance measurement unit 3 and the measured target 4 caused by the skew is prevented.

[0049] In the embodiment, the displacement mechanism 2 includes a pneumatic driving structure including a pneumatic cylinder and other pneumatic units. The pneumatic driving structure has the advantages of realizing the flexible contact between the resistance measurement unit 3 and the measured target 4 and preventing the damage to the surface of the measured target 4. Of course, the displacement mechanism 2 can also use the electric driving principle, that is, a motor is connected with a vertical lead screw, a sliding block is arranged on the lead screw, the resistance measurement unit 3 is driven by the sliding block to move up and down, or other driving modes such as synchronous belt driving and other driving modes in the prior art can be used.

[0050] In a specific implementation, the display unit is further included; the display unit is connected with the master MCU unit, and is used to display the data transmitted by the master MCU unit, so that people on site can observe the measured values without using a mobile terminal.

[0051] In a specific implementation, as shown in the following Figures 3 to 4 The resistance measurement unit 3 includes:

[0052] The push-pull voltage boosting module is connected with the battery unit, and is used to rectify and filter the current provided by the battery unit and boost the voltage; specifically, the remote control type self-contacting intelligent insulation resistance meter has multiple gears such as 500V, 1000V, 2500V, and 5000V, and can be provided with multiple gears at the same time; generally, the voltage provided by the battery unit is 12V, and the push-pull voltage boosting module converts 12V into high-voltage, i.e., 500V, 1000V, 2500V, and 5000V, for voltage boosting; because the voltage is relatively large, a safety protection module is arranged, which is connected with the push-pull voltage boosting module, and is used to limit the voltage output by the push-pull voltage boosting module and limit the current, so as to protect the human body; and

[0053] The resistance measurement module is connected with the safety protection module, the measured object, and the master MCU unit respectively, and is used to input the voltage and current output by the safety protection module to the measured target 4, measure the terminal voltage and terminal current of the measured object, and transmit them to the master MCU unit, so as to calculate the insulation resistance value of the measured target 4 by the master MCU unit.

[0054] In a specific implementation, the resistance measurement module includes:

[0055] The voltage measurement circuit is connected with both ends of the measured target 4, and is used to measure the voltage of the measured target 4;

[0056] The sampling resistance is connected in series with the measured target 4; and

[0057] The current measurement circuit is connected in parallel across the sampling resistance, and is used to measure the voltage of the sampling resistance.

[0058] The principle of calculating the insulation resistance value of the measured target 4 by the master MCU unit is that the current measurement circuit measures the voltage of the sampling resistance R3, i.e., the voltage U33 of R3, and R3 is known, so the current I3 flowing through R3 can be calculated as I3=U3 / R3; the measured target 4 is connected in series with R3, so the current I1 flowing through the measured target 4 R1 is I1=I3; the voltage U1 of the measured target 4 R1 measured by the voltage measurement circuit can be used to calculate the measured target 4 R1, i.e., R1=U1 / I1=U1 / I3.

[0059] In the embodiment, the safety protection module comprises a high-voltage current limiting module and a voltage limiting module, the high-voltage current limiting module is used to keep the output current of the resistance measurement module within a set range, and the voltage limiting module is used to keep the voltage of the resistance measurement module less than a limited range.

[0060] The voltage measurement circuit and the current measurement circuit both adopt a sampling amplification circuit, and the voltage measurement circuit and the current measurement circuit read data after the collected data are amplified and conditioned by the corresponding sampling amplification circuit.

[0061] The safety protection module comprises a high-voltage current limiting module and a voltage limiting module, the high-voltage current limiting module is used to keep the output current of the resistance measurement module within a set range, i.e., a small range of less than 30 mA, without endangering personnel safety, and the voltage limiting module is used to keep the upper limit of the voltage of the resistance measurement module within a stable range, i.e., the voltage of the resistance measurement module is less than 5000 V, without damaging elements.

[0062] The core element of the push-pull voltage boosting module is a high-frequency transformer.

[0063] Specifically, the push-pull voltage boosting module comprises a first switch tube Q1, a second switch tube Q2, a high-frequency transformer, a rectifier bridge and a rectifier capacitor, one end Np1 of a primary coil of the high-frequency transformer is connected with one end of the first switch tube Q1, the other end Np2 of the primary coil of the high-frequency transformer is connected with one end of the second switch tube Q2, the other end of the first switch tube Q1 is connected with the other end of the second switch tube Q2 and then grounded, and the middle point of the primary coil of the high-frequency transformer and the other end of the first switch tube Q1 are used as an output end of the push-pull voltage boosting module; a secondary coil of the high-frequency transformer is connected with an input end of the rectifier bridge, and an output end of the rectifier bridge is connected with the rectifier capacitor.

[0064] The working principle of the push-pull voltage boosting module is that the first switch tube Q1 and the second switch tube Q2 are turned on alternately, a high-frequency voltage is induced in the secondary coil, the stable direct current is obtained through diode and capacitor rectification filtering, and the highest induced voltage is 5000 V.

[0065] Embodiment Two

[0066] The difference between the embodiment and the embodiment one is that the resistance measurement unit 3 is located on one side edge of the upper clamping part 11, so as to avoid opening a hole in the upper clamping part 11 and reduce manufacturing difficulty.

[0067] In summary, the application provides a remote control type self-contacting intelligent insulation resistance meter, comprising a wire clamp, the wire clamp is used for clamping a measured target, an insulation material is used for the clamping part of the wire clamp to prevent the measured target from being electrified to endanger personal safety during clamping operation, a displacement mechanism is arranged on the clamping part of the wire clamp, a resistance measuring unit is used for measuring an insulation value of the measured target, the resistance measuring unit is installed on the displacement mechanism to be contacted or separated from the measured target under the driving of the displacement mechanism, a main control MCU unit is electrically connected with the resistance measuring unit and the displacement mechanism, is used for collecting, processing and transmitting data measured by the resistance measuring unit and controlling the moving action of the displacement mechanism, a battery unit is connected with the resistance measuring unit, the displacement mechanism and the main control MCU unit, is used for supplying power for each working module, and a wireless communication unit is connected with the main control MCU unit, is used for transmitting data transmitted by the main control MCU unit to an external terminal.

[0068] The foregoing description of specific exemplary embodiments of the application is presented for the purpose of illustration and description and is not intended to limit the application to the precise form described, and it is apparent that many modifications and variations are possible in light of the above teaching. Although exemplary embodiments have been shown and described, the present embodiments are merely exemplary, and it will be apparent to those skilled in the art that substantial equivalents can be attained by those skilled in the art with the teachings of the present disclosure, while they are within the scope of the application as defined by the appended claims. The descriptions of specific embodiments are merely exemplary and are not intended to limit the application to the precise forms described. It is apparent that many modifications and variations are possible in light of the above teachings, and it is intended that the application encompass such modifications and variations as fall within the scope of the appended claims.

Claims

1. A remote control type self-contacting intelligent insulation resistance meter, characterized in that, The utility model relates to a kind of insulating resistance measuring device, including: Clamp;The clamp is used to clamp the measured target;The clamping part of the clamp adopts insulating material to prevent the measured target from being dangerous to personal safety when clamping operation;Displacement mechanism is equipped on the clamping part of the clamp; Resistance measuring unit, for measuring the insulating value of the measured target;The resistance measuring unit is installed on the displacement mechanism to contact or separate from the measured target under the driving of displacement mechanism; Master MCU unit, electrically connected with the resistance measuring unit, displacement mechanism, for collecting, processing and transmitting the data measured by resistance measuring unit and controlling the moving action of displacement mechanism; Battery unit, connected with the resistance measuring unit, displacement mechanism and master MCU unit, for powering each working module;And Wireless communication unit, connected with the master MCU unit, for transmitting the data sent by master MCU unit to external terminal.

2. The remote controlled self contact intelligent insulation resistance meter according to claim 1, characterized in that, The clamping part includes upper clamping part and lower clamping part;The displacement mechanism is installed on the upper clamping part.

3. The remote controlled self contact intelligent insulation resistance meter according to claim 2, characterized in that, First through-hole is equipped on the upper clamping part, which communicates the upper and lower surfaces;The resistance measuring unit contacts or separates from the measured target through the first through-hole.

4. The remote controlled self contact intelligent insulation resistance meter according to claim 3, characterized in that, The first through-hole is located at the center of the upper clamping part.

5. The remote controlled self contact intelligent insulation resistance meter according to claim 2, characterized in that, The resistance measuring unit is located on one side of the upper clamping part.

6. The remote controlled self contact intelligent insulation resistance meter according to claim 1, characterized in that, The displacement mechanism includes air pressure driving structure.

7. The remote controlled self contact intelligent insulation resistance meter according to claim 1, characterized in that, It also includes display screen unit;The display screen unit is connected with the master MCU unit, for displaying the data transmitted by master MCU unit.

8. The remote controlled self contact intelligent insulation resistance meter according to claim 1, characterized in that, The resistance measuring unit includes: Push-pull boost module, connected with battery unit, for rectifying, filtering and boosting the current provided by battery unit; Safety protection module, connected with push-pull boost module, for limiting the voltage output by push-pull boost module and limiting the current;And Resistance measuring module, connected with safety protection module, measured object and master MCU unit respectively, for inputting the voltage and current output by safety protection module to the measured target, measuring the terminal voltage and terminal current of measured object and transmitting to master MCU unit, calculating the insulating resistance value of the measured target through master MCU unit.

9. The remote controlled self contact intelligent insulation resistance meter according to claim 8, characterized in that, The resistance measuring module includes: Voltage measurement circuit, the voltage prediction both ends are connected with the two ends of the measured target, for measuring the voltage of the measured target; Sampling resistance, the sampling resistance is connected in series with the measured target;And Current measurement circuit, the current measurement circuit is connected in parallel at both ends of sampling resistance, for measuring the voltage of sampling resistance.

10. The remote controlled self contact intelligent insulation resistance meter according to claim 8, characterized in that, The safety protection module includes high-voltage current limiting module and voltage limiting module, the high-voltage current limiting module is used to keep the output current of resistance measuring module in the set range;The voltage limiting module is used to make the voltage of resistance measuring module less than the limited range.

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