CN110134635A - A multifunctional calculator for high voltage test and its operation flow - Google Patents

Abstract

The invention discloses a multifunctional calculator for high voltage test, which comprises a calculator main body and a protective cover rotatably connected to the calculator main body. A display screen is arranged on the screen, and an operation keyboard is arranged below the display screen. The operation keyboard includes a keycap and an installation slot corresponding to the keycap on the main body of the calculator. The inside of the main body of the calculator is connected to the The corresponding position of the embedded groove is equipped with a pressing column through a spring. The set operation keyboard can be used in cooperation with the dust-proof loose skirt and the dust-proof ring, which can effectively prevent dirt from entering the calculator from the gap of the keycap. Inside the main body, it can effectively ensure that it can work normally in a complex working environment, and the set USB interface can import corresponding calculation formulas according to calculation requirements, which can be applied to various complex data calculations, and its calculation efficiency higher.

Description

A multifunctional calculator for high voltage test and its operation flow

technical field

Embodiments of the present invention relate to the technical field of calculators, and in particular to a multifunctional calculator for high voltage testing and its calculation process.

Background technique

The power system is an electric energy production and consumption system composed of power plants, power transmission and transformation lines, power supply and distribution stations, and electricity consumption. Power transformation and distribution supply electric energy to various users. In order to realize this function, the electric power system also has corresponding information and control systems in various links and different levels to measure, adjust, control, protect, and communicate the production process of electric energy. and scheduling to ensure that users obtain safe and high-quality electric energy.

When conducting high-voltage tests in power systems, a large amount of data calculations are involved. Some numerical calculations are relatively simple and can be completed using traditional calculators, but some calculations involve exponential or multi-step calculations, such as the temperature conversion of insulation resistance, The series calculation of capacitance is cumbersome to realize the above calculation operations, and it needs to be divided into multiple calculations to get the final result, which leads to a lot of time spent on data processing on site, and there are cases where human calculation errors lead to wrong conclusions, and The staff in the field test have a lot of dirt and sweat on their hands, and the stains can easily enter the inside of the calculator from the gaps of the calculator keyboard, which often causes the keyboard to malfunction and is very inconvenient, which needs to be solved by us.

Contents of the invention

To this end, the embodiment of the present invention provides a multifunctional calculator for high-voltage testing and its calculation process, through which multiple calculation items can be directly substituted into the data for calculation, and with the dust-proof umbrella skirt arranged on the connecting column, it can It solves the problems in the prior art that the traditional calculator used in the electric high-voltage test is slow in calculation speed and prone to data errors, and the traditional calculator is affected by stains, resulting in keyboard failure.

In order to achieve the above object, embodiments of the present invention provide the following technical solutions:

A multifunctional calculator for high-voltage testing, comprising a calculator main body and a protective cover rotatably connected to the calculator main body, the protective cover is provided with a fixing assembly opposite to the calculator main body, and the calculator main body is provided with a display screen, an operating keyboard is arranged below the display screen;

The operating keyboard includes a keycap and a mounting slot corresponding to the keycap provided on the main body of the calculator. A pressing column is installed at a position corresponding to the mounting slot inside the calculator body through a spring, and the mounting slot There is a connecting column with both ends plugged together with the pressing column and the keycap respectively, the connecting column is provided with a dust-proof umbrella skirt, and two dust-proof rings are arranged in the installation slot, and the dust-proof The ring is provided with an annular sliding groove corresponding to the dust-proof umbrella skirt, and the two dust-proof umbrella skirts are slidably connected to both ends of the dust-proof umbrella skirt through the annular sliding groove.

As a preferred solution of the present invention, the dust-proof shed and the connecting post are injection-molded parts formed at one time, and there are several metal sheets in an annular array about the connecting post on the dust-proof shed.

As a preferred solution of the present invention, the protective cover is provided with a placement slot corresponding to the operating keyboard, and an observation slot corresponding to the display screen is opened in the placement slot.

As a preferred solution of the present invention, the fixing assembly includes a fixing slot opened on the main body of the calculator and a fixing block arranged on the protective cover and corresponding to the fixing slot, and the fixing slot is connected by a spring for The pressing rod fixedly connected with the fixed block when the cover is closed.

As a preferred solution of the present invention, the main body of the calculator also includes a single-chip microcomputer, a USB interface, a battery installation slot, a temperature and humidity sensor arranged at a corner of the main body of the calculator, and a PCB circuit board arranged correspondingly to the pressing column. The interface is arranged on the side wall of the main body of the calculator, and a storage battery is installed in the battery installation groove, and the single-chip microcomputer is respectively electrically connected with the USB interface, the PCB circuit board and the storage battery.

Further, the present invention also provides a calculation process of a multifunctional calculator for high voltage test, including the following steps:

Step S100, open the protective case, and start the calculator;

Step S200, select the corresponding calculation item as required;

Step S300, measure and obtain the required calculation data, and input the calculation data into the calculator;

Step S400, substituting the data into the formula corresponding to the calculation item to obtain the calculation result.

As a preferred solution of the present invention, according to step S200, the calculation items include at least the DC resistance of the aluminum winding, the DC resistance of the copper winding, insulation resistance and series capacitance.

As a preferred solution of the present invention, the conversion formula of the DC resistance of the aluminum winding is: R ₂ =R ₁ (T+t ₂ )/(T+t ₁ ), where R ₁ and R ₂ are respectively at temperature The resistance value under t ₁ and t ₂ , T is the temperature field and the value is 225;

The conversion formula of the DC resistance of the copper winding is: R ₂ =R ₁ (T+t ₂ )/(T+t ₁ ), where R ₁ and R ₂ are the resistance values at temperatures t ₁ and t ₂ respectively , T is the temperature field and its value is 235;

The conversion formula of the insulation resistance is:

The formula for the series value of the series capacitor is: series value=C ₁ ×C ₂ /(C ₁ +C ₂ ).

As a preferred solution of the present invention, the calculation formulas for the deviation value of the aluminum winding DC resistance, the copper winding DC resistance and the insulation resistance are: (converted value-historical value)÷historical value×100%, and the series capacitance The formula for calculating the deviation value is: (serial value-C _n )/C _n ×100%.

Embodiments of the present invention have the following advantages:

(1) The present invention utilizes the operating keyboard provided, and when in use, the dust-proof loose skirt and the dust-proof ring can be used to effectively prevent stains from entering the inside of the calculator main body from the gap of the keycap, and can effectively Ensure that it can work normally in complex working environments.

(2) The present invention can import corresponding formulas according to the needs of calculation through the provided USB interface, and can be applied to various complex data calculations, avoiding the need for multiple calculations to obtain results when using traditional calculators , its computational efficiency is low and prone to errors.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that are required in the description of the embodiments or the prior art. Apparently, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative work.

The structures, proportions, sizes, etc. shown in this manual are only used to cooperate with the content disclosed in the manual, so that people familiar with this technology can understand and read, and are not used to limit the conditions for the implementation of the present invention, so there is no technical In the substantive meaning above, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the technical content disclosed in the present invention without affecting the functions and objectives of the present invention. within the range that can be covered.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the bottom view of the present invention;

Fig. 3 is the structural representation of operating keyboard among the present invention;

Fig. 4 is the structural representation of fixing assembly among the present invention;

Fig. 5 is the operation flowchart of the present invention;

FIG. 6 is a schematic structural diagram of the computer operation system of the present invention.

In the picture:

1-calculator body; 2-protective cover; 3-fixed components; 4-display screen; 5-operating keyboard; 6-placement slot; 7-observation slot; ; 11-temperature and humidity sensor; 12-PCB circuit board; 13-battery;

301-fixing groove; 302-fixing block; 303-pressing rod;

501-key cap; 502-installation slot; 503-press column; 504-connecting column; 505-dustproof umbrella skirt; 506-dust ring;

Detailed ways

The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Fig. 1 to Fig. 4, the present invention provides a kind of multifunctional calculator for high voltage test, comprises calculator main body 1 and the protective cover 2 that is rotatably connected on the calculator main body 1, between calculator main body 1 and protective cover 2 A torsion spring is provided at the rotating connection, so that the protective cover 2 can be automatically bounced off without external force, so as to facilitate the user's operation. The protective cover 2 is provided with a fixing component 3 opposite to the calculator main body 1, The main body of the calculator 1 is provided with a display screen 4, and an operation keyboard 5 is provided below the display screen 4. The display screen 4 adopts an LCD screen with a backlight, so as to ensure that when using in the strong outdoor sunlight, the The data on the display screen 4 can be read clearly.

In addition, the calculator main body 1 also includes a single-chip microcomputer 8, a USB interface 9, a battery installation slot 10, a temperature and humidity sensor 11 arranged at a corner of the calculator main body 1, and a PCB circuit board 12 arranged correspondingly to the pressing column 503. The USB interface 9 is arranged on the side wall of the calculator main body 1, and a storage battery 13 is installed in the battery installation groove 10, and the single-chip microcomputer 8 is electrically connected with the USB interface 9, the PCB circuit board 12 and the storage battery 13 respectively, and is kept at temperature. The humidity sensor 11 is provided with a dust-proof grid to avoid the influence of dust on the temperature and humidity sensor 11. The model that the temperature and humidity sensor 11 can adopt is SHT20, which can ensure the accuracy of its detection when in use. The calculator itself carries The temperature and humidity sensor 11 can display the temperature at the test site, avoiding the trouble of carrying an additional temperature and humidity meter during the test, and the set single-chip microcomputer 8 adopts a programmable single-chip microcomputer 8, which can be used in actual use. Utilize the USB interface 9 to input the corresponding calculation formula, thereby greatly improving its scope of application.

The operating keyboard 5 includes a keycap 501 and a mounting slot 502 provided on the calculator main body 1 and corresponding to the keycap 501, and a pressing column is installed inside the calculator body 1 corresponding to the mounting slot 502 through a spring. 503, and the installation slot 502 is provided with a connecting column 504 whose two ends are respectively plugged together with the pressing column 503 and the keycap 501, and the connecting column 504 is provided with a dust-proof umbrella skirt 505, and the dust-proof The umbrella skirt 505 and the connecting column 504 are injection molded parts formed at one time, and there are several metal sheets 508 on the dust-proof umbrella skirt 505 in an annular array with respect to the connecting column 504, and the dust-proof umbrella skirt 505 and the connecting column 504 are in an integrated structure. It can prevent dust from entering the interior of the calculator main body 1 from the gap between them, and the set metal sheet 508 can play a role in supporting the dust-proof umbrella skirt 505, avoiding the problem that it cannot be opened for dust-proofing. Two dust-proof rings 506 are also arranged in the installation slot 502, and an annular sliding groove 507 corresponding to the dust-proof umbrella skirt 505 is arranged on the dust-proof ring 506, and the two dust-proof umbrella skirts 505 respectively pass through the The annular sliding groove 507 is slidably connected to both ends of the dust-proof umbrella skirt 505 , that is, the purpose of dustproofing the calculator is finally achieved through the cooperation of the dust-proof umbrella skirt 505 and the annular sliding groove 507 .

In use, pressing the keycap 501 can drive the movement of the pressing column 503 through the connecting column 504, the movement of the connecting column 504 will drive the dust-proof umbrella skirt 505 to move in the annular sliding groove 507, and the movement of the pressing column 504 will contact the PCB circuit board 12. When there is no external force, the pressing column 504 will automatically reset under the force of the tension spring, so as to input a command to the calculator, and the set dust-proof ring 506 can be disassembled, which is convenient for long-term use. It is more convenient for the user to clean up the dust accumulated in the dust-proof ring 506 .

What needs to be added is that the protective cover 2 is provided with a placement groove 6 corresponding to the operation keyboard 5, and an observation groove 7 corresponding to the display screen 4 is provided in the placement groove 6, and the placement groove 6 can avoid being placed on the protective cover. 2 When it is closed, it will press the keycap 501, and a transparent acrylic plate is arranged in the observation slot 7, which is convenient for the user to watch the time, date, temperature, humidity and some other information displayed on the display screen when the calculator is in standby .

The fixing assembly 3 includes a fixing slot 301 provided on the main body of the calculator 1 and a fixing block 302 arranged on the protective cover 2 and corresponding to the fixing slot 301. The fixing slot 301 is connected by a spring for mounting on the protective cover 2. The pressing rod 303 fixedly connected with the fixed block 302 when closing; when the protective cover is closed, the fixed block can be embedded in the fixing groove, thereby the fixing of the fixed block can be realized by the pressing rod under the action of the spring, and when the protective cover is pressed When the lever is pressed, the fixed block can be disengaged from the fit of the pressing lever, and then the protective cover can be automatically bounced off under the action of the torsion spring at the rotating joint of the protective cover.

As shown in Figure 5 and Figure 6, the operation process includes the following steps:

Step S100, open the protective case, and start the calculator;

Step S200, select the corresponding calculation item as required;

Step S300, measure and obtain the required calculation data, and input the calculation data into the calculator;

Step S400, substituting the data into the formula corresponding to the calculation item to obtain the calculation result.

According to step S200, the calculation items include at least the DC resistance of the aluminum winding, the DC resistance of the copper winding, insulation resistance and series capacitance.

The conversion formula of the DC resistance of the aluminum winding is: R ₂ =R ₁ (T+t ₂ )/(T+t ₁ ), where R ₁ and R ₂ are the resistance values at temperatures t ₁ and t ₂ respectively , T is the temperature field and its value is 225;

The conversion formula of the DC resistance of the copper winding is: R ₂ =R ₁ (T+t ₂ )/(T+t ₁ ), where R ₁ and R ₂ are the resistance values at temperatures t ₁ and t ₂ respectively , T is the temperature field and its value is 235;

The conversion formula of the insulation resistance is:

The formula for the series value of the series capacitor is: series value=C ₁ ×C ₂ /(C ₁ +C ₂ ).

The calculation formulas of the deviation value of the aluminum winding DC resistance, the copper winding DC resistance and the insulation resistance are: (converted value-history value)÷historical value×100%, and the calculation formula of the deviation value of the series capacitor is: (series connection Value - C _n )/C _n x 100%.

The calculation items in the calculator can be expanded according to the needs, so that when calculating certain data, the calculated data results can be directly obtained after inputting the basic parameters, and the calculation will be more convenient, and the traditional calculation method can be avoided. It requires multiple calculations, which is computationally intensive and prone to errors.

Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (9)

1. a kind of high-potting multifunctional calculator, which is characterized in that including calculator main body (1) and be rotatably connected on calculating Protection cap (2) in device main body (1) is relatively set with fixation kit (3), institute on the protection cap (2) and calculator main body (1) It states and is provided with display screen (4) on calculator main body (1), operation keyboard (5) is provided with below the display screen (4)；

The operation keyboard (5) includes keycap (501) and is provided on calculator main body (1) and peace corresponding with keycap (501) Assembly slot (502), the calculator main body (1) is internal to be equipped with pressing by spring with installation caulking groove (502) corresponding position Column (503), and be provided with both ends in the installation caulking groove (502) and be plugged in together respectively with by compression leg (503) and keycap (501) Connecting column (504), be provided with dust-proof full skirt (505) on the connecting column (504), also set up in the installation caulking groove (502) There are two dust ring (506), ring-shaped slide slot corresponding with dust-proof full skirt (505) is provided on the dust ring (506) (507), two dust-proof full skirts (505) pass through the ring-shaped slide slot (507) and the two of the dust-proof full skirt (505) respectively End is slidably connected.

2. a kind of high-potting multifunctional calculator according to claim 1, which is characterized in that the dust-proof full skirt It (505) is one-time formed moulding with connecting column (504), and about connecting column (504) annular on the dust-proof full skirt (505) Array has several sheet metals (508).

3. a kind of high-potting multifunctional calculator according to claim 1, which is characterized in that the protection cap (2) On be installed with operation keyboard (5) corresponding placing groove (6), offer in the placing groove (6) corresponding with display screen (4) It observes slot (7).

4. a kind of high-potting multifunctional calculator according to claim 1, which is characterized in that the fixation kit It (3) include that the fixing groove (301) being provided on calculator main body (1) and setting are on protection cap (2) and right with fixing groove (301) The fixed block (302) answered is connected with for when protection cap (2) is closed and fixed block in the fixing groove (301) by spring (302) affixed pressing lever (303).

5. a kind of high-potting multifunctional calculator according to claim 1, which is characterized in that the calculator main body (1) further include single-chip microcontroller (8), USB interface (9), battery settling groove (10), setting it is warm and humid at (1) one jiao of calculator main body Degree sensor (11) and with the PCB circuit board (12) that is correspondingly arranged by compression leg (503), USB interface (9) setting is in calculator On the side wall of main body (1), and the battery settling groove (10) in be equipped with battery (13), the single-chip microcontroller (8) respectively with USB Interface (9), PCB circuit board (12) and battery (13) are electrically connected.

6. a kind of operation process of high-potting multifunctional calculator, which comprises the steps of:

Step S100 opens protective shell, and starts the calculator；

Step S200 selects corresponding calculating project as needed；

Step S300, measurement calculate data required for obtaining, and will calculate data and input calculator；

Data are substituted into formula corresponding with the project of calculating, obtain calculated result by step S400.

7. a kind of operation process of high-potting multifunctional calculator according to claim 6, it is characterised in that；According to Step S200, the calculating project include at least aluminium winding D.C. resistance, copper winding D.C. resistance, insulation resistance and series electrical Hold.

8. a kind of operation process of high-potting multifunctional calculator according to claim 7, it is characterised in that；It is described The convert formula of aluminium winding D.C. resistance are as follows: R₂=R₁(T+t₂)/(T+t₁), R in formula₁、R₂Respectively in temperature t₁、t₂Under electricity Resistance value, T is temperature field and value is 225；

The convert formula of the copper winding D.C. resistance are as follows: R₂=R₁(T+t₂)/(T+t₁), R in formula₁、R₂Respectively in temperature t₁、 t₂Under resistance value, T is temperature field and value is 235；

The convert formula of the insulation resistance are as follows:

The series value formula of the series capacitance are as follows: series value=C₁×C₂(C₁+C₂)。

9. a kind of operation process of high-potting multifunctional calculator according to claim 7, it is characterised in that；It is described The deviation calculation formula of aluminium winding D.C. resistance, copper winding D.C. resistance and insulation resistance is equal are as follows: (reduced value-history value) ÷ History value × 100%, and the deviation calculation formula of the series capacitance are as follows: (series value-C_n)C_n× 100%.