Mathematical model-based instrument with water mist prevention function

Abstract

The invention relates to the technical field of instruments and meters, in particular to a mathematical model-based instrument and meter with a water mist prevention function. The mathematical model-based instrument with the water mist prevention function comprises a power connection module and a conversion module, a circuit board cavity is formed in the conversion module, a circuit board is installed in the circuit board cavity, and a transparent glass plate is installed on one side of the circuit board cavity. The conversion module is further provided with a reset button, the reset button arranged on the conversion module is electrically connected with the circuit board in the circuit board cavity, and a sealing assembly is installed at the position, making contact with the reset button, of the conversion module. In addition, an exhaust assembly is communicated in the circuit board cavity, and a heating assembly is installed on the inner side of the transparent glass plate close to the interior of the circuit board cavity. According to the instrument with the water mist prevention function based on the mathematical model, the water mist prevention function of the whole instrument with the water mist prevention function based on the mathematical model can be achieved through various measures.

Description

Technical Field

[0001] The invention relates to the technical field of instruments and meters, in particular to an instrument and meter with a waterproof fog function based on a mathematical model. Background Art

[0002] Instruments play an important role in the construction and application of mathematical models. First, they can collect data: Instruments can accurately collect various physical quantities, such as temperature, pressure, flow rate, etc., and convert these physical quantities into data that can be used by mathematical models; second, they can convert signals. Instruments usually have a signal conversion function, which can convert the collected physical quantity signals into electrical signals or digital signals required by mathematical models.

[0003] A thermal resistor is a substance that changes its resistance when the temperature changes, and its resistance value is proportional to the temperature. A thermal resistor signal is a physical quantity signal sensed and expressed by a thermal resistor. As a common temperature sensor, thermal resistors are widely used in the field of industrial automation. When the temperature changes, the resistance value of the thermal resistor will change accordingly, so that the temperature signal can be measured and expressed.

[0004] In the related art, instruments are generally used for the detection of thermal resistance signals. The instruments used are usually equipped with a dashboard for displaying the detection data. When the instruments are in operation, if the dashboard is not defogged, some disadvantages will occur: for example, the fog on the dashboard or display screen will block the information, making it difficult for the operator to read the data displayed on the instrument; at the same time, the electronic components inside the dashboard or behind the display screen will generate heat when working. If there is fog on the surface, it will affect the heat dissipation, and in an environment with a large temperature difference, condensation may occur inside the dashboard or behind the display screen; condensation will not only affect the clarity of the instrument, but may also cause problems such as circuit short circuit; therefore, it is very important to defog the dashboard of the instrument;

[0005] At present, in order to simplify the defogging method, the instrument panel is generally defogged by applying an anti-fog coating, which is applied to the display panel or transparent parts of the instrument; this coating can prevent water vapor from condensing into fog on the surface and keep the field of vision clear; at the same time, the anti-fog coating can be a multifunctional nano coating with super strong water resistance and wear resistance, which can greatly extend the anti-fog time;

[0006] However, the defects of this method are also obvious. For example, the anti-fog coating cannot provide protection for the operating button position inside the instrument, and it is easy for water vapor to enter through the gap between the operating button and the instrument, and finally generate water vapor inside the instrument; in addition, although the anti-fog coating ensures that water mist is not easy to be generated on the outer surface of the dial, the air pressure inside and outside the instrument cannot be balanced due to the air tightness of the anti-fog coating. In addition, the circuit board inside the instrument generates heat and pressurizes during operation, making the air pressure and temperature inside and outside the instrument different. This makes it easy for water mist to accumulate on the internal surface of the instrument, which in turn causes the entire instrument to be affected by moisture and corroded, shortening its service life;

[0007] In view of the problems in the above-mentioned background technology, the present invention aims to provide an instrument with anti-fog function based on a mathematical model. Summary of the invention

[0008] The purpose of the present invention is to provide an instrument with anti-fog function based on a mathematical model to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] An instrument with anti-fog function based on a mathematical model, the instrument with anti-fog function based on a mathematical model comprising:

[0011] A power connection module for connecting to an external power source and receiving and transmitting a thermal resistance signal of an instrument to be detected, and a conversion module for isolating and transmitting the thermal resistance signal output by the power connection module, outputting a standard current and voltage signal and feeding it back to a control room, and for real-time monitoring of the instrument to be detected based on a digital model of the control room, and for giving a timely warning when an electrical fault occurs in the instrument; the conversion module is installed on one side of the power connection module and is electrically connected to the power connection module;

[0012] A circuit board cavity is formed inside the conversion module, a circuit board for converting thermal resistance signals is installed inside the circuit board cavity, and a transparent glass plate is installed on one side of the circuit board cavity; a reset button is also provided on the conversion module, the reset button arranged on the conversion module is electrically connected to the circuit board inside the circuit board cavity, and a sealing component is installed at a position of the conversion module in contact with the reset button;

[0013] In addition, an exhaust component is connected to the inside of the circuit board cavity, and a heating component is installed at a position on the inner side of the transparent glass plate close to the inside of the circuit board cavity.

[0014] As a further solution of the present invention: the power connection module is in a Π shape, and wire holes are symmetrically distributed on both sides of the power connection module; an alignment groove is formed on the inner side of the power connection module, and the size of the alignment groove is adapted to the size of one side of the conversion module; at the same time, alignment power connection jacks and signal contact plates are provided on the upper and lower inner walls of the alignment groove, and an alignment power connection plug block and a signal receiving plate are respectively provided at corresponding positions on one side of the conversion module.

[0015] As a further solution of the present invention: positioning blocks are symmetrically installed on one side of the power connection module, and slots are formed between the symmetrically installed positioning blocks; and positioning holes are formed on the surfaces of the positioning blocks.

[0016] As a further solution of the present invention: a wiring groove is opened on one side of the conversion module, a wiring board is installed inside the wiring groove, the wiring board is electrically connected to the circuit board installed inside the circuit board cavity, and the position where the wiring board and the circuit board cavity are connected is a sealed connection; at the same time, a sealing plate is movably installed on one side of the conversion module at the position where the wiring groove is opened.

[0017] As a further solution of the present invention: a sealing component arranged at the reset button position of the conversion module includes a key combination and a T-shaped pressure plate, a crucible piece is provided on the circuit board located inside the circuit board cavity, and the crucible piece is in an arc shape; the T-shaped pressure plate is T-shaped, and one side of the T-shaped pressure plate is in extrusion contact with one side of the crucible piece; a key combination is installed at the other end of the T-shaped pressure plate, a reset button is provided at one end of the key combination, the reset button is slidably installed inside the reset cavity formed inside the conversion module, and the reset cavity is installed with plastic blocks at positions corresponding to both sides of the reset button; a compression spring is sleeved on the outside of the key combination.

[0018] As a further solution of the present invention: the exhaust component includes a bent exhaust hole, a reflux hole and an exhaust pipe, one end of the exhaust pipe is connected to the inside of the circuit board cavity, the other end of the exhaust pipe is connected to one end of the bent exhaust hole, the bent position at the bottom end of the bent exhaust hole is connected to the reflux hole, and a sealing plug is installed inside the end part after one end of the reflux hole passes through the inner wall of the conversion module; a waterproof and breathable membrane is installed inside the end part after one end of the bent exhaust hole passes through the inner wall of the conversion module.

[0019] As a further solution of the present invention: the heating component includes an electric heating paint strip, which is printed and pasted on the inner surface of the transparent glass plate to form a group of parallel lines. The distance between two adjacent electric heating paint strips is about 1 cm, and a parallel circuit is formed.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The instrument with anti-fog function based on the mathematical model has the following advantages compared with the current instrument for detecting thermal resistance signals which only applies anti-fog coating on the instrument panel surface:

[0022] First, a sealing component is arranged at the position where the operation button is installed on the instrument, and the sealing component is used to ensure that water vapor does not enter when the operator operates the reset button position, and to ensure that water mist is not easy to form at the transparent glass plate position; the sealing component includes a key combination and a T-shaped pressure plate, and a crucible sheet is arranged on the circuit board inside the circuit board cavity, and the crucible sheet is in an arc shape; the T-shaped pressure plate is in a T-shape, and one side of the T-shaped pressure plate is in extrusion contact with one side of the crucible sheet; through the cooperation of the set plastic stopper and the set T-shaped pressure plate, the sealing and waterproof effect can be achieved when the operation button is moving or stopping the operation;

[0023] Second, an exhaust assembly is connected inside the circuit board cavity, and the exhaust assembly is used to balance the air pressure inside the circuit board cavity and prevent water vapor from entering, so as to always maintain the clarity of the transparent glass plate; the exhaust assembly includes a bent exhaust hole, a reflux hole and an exhaust pipe, and a waterproof breathable membrane is installed inside the bent exhaust hole, so that when the circuit board installed inside the circuit board cavity is powered on, it can be ventilated and dissipated in time while balancing the air pressure inside the circuit board cavity and the outside; and the waterproof breathable membrane installed inside the bent exhaust hole can prevent water vapor from entering. This design can not only maintain the clarity of the instrument, but also extend its service life;

[0024] 3. A heating component is installed on the inner side of the transparent glass plate near the inside of the circuit board cavity. The heating component is used to quickly heat and evaporate the water mist condensed on the surface of the transparent glass plate, thereby always ensuring the clarity of the transparent glass plate;

[0025] In this way, the anti-fog function of the entire instrument with anti-fog function based on the mathematical model can be realized through a variety of measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0027] Figure 1 The schematic diagram is a structural diagram of an instrument with anti-fog function based on a mathematical model according to an embodiment of the present invention.

[0028] Figure 2 It is a side view of an instrument with anti-fog function based on a mathematical model according to an embodiment of the present invention.

[0029] Figure 3 It is a front view of an instrument with anti-fog function based on a mathematical model according to an embodiment of the present invention.

[0030] Figure 4The top view of the instrument with anti-fog function based on the mathematical model according to the embodiment of the present invention.

[0031] Figure 5 The schematic diagram of button installation of an instrument with anti-fog function based on a mathematical model according to an embodiment of the present invention.

[0032] Figure 6 The present invention is a schematic diagram of the installation of the air vents of the instrument with anti-fog function based on the mathematical model according to the embodiment of the present invention.

[0033] Figure 7 The present invention is a wiring diagram of an instrument with anti-fog function based on a mathematical model according to an embodiment of the present invention.

[0034] In the figure: 1-positioning block, 2-positioning hole, 3-power connection module, 4-wire hole, 5-alignment slot, 6-alignment power connection jack, 7-signal contact plate, 8-conversion module, 9-transparent glass plate, 10-electrical heating paint strip, 11-reset button, 12-wiring slot, 13-sealing plate, 14-key combination, 15-T-type pressure plate, 16-plastic stopper, 17-crusher piece, 18-waterproof breathable membrane, 19-bending exhaust hole, 20-reflux hole, 21-exhaust pipe, 22-circuit board cavity. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example

[0037] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the instrument and meter with waterproof fog function based on the mathematical model provided in the embodiment of the present invention, the instrument and meter with waterproof fog function based on the mathematical model includes:

[0038] A power connection module 3 and a conversion module 8, wherein the power connection module 3 is used to connect to an external power source and receive and transmit a thermal resistance signal of the instrument to be detected; the conversion module 8 is installed on one side of the power connection module 3 and is electrically connected to the power connection module 3. The conversion module 8 is used to transmit the thermal resistance signal output by the power connection module 3 through isolation, and output a standard current and voltage signal to the control room. Based on the digital model of the control room, it is used to monitor the instrument to be detected in real time, and when an electrical fault occurs in the instrument, an early warning can be issued in time;

[0039] Among them, a circuit board cavity 22 is formed inside the conversion module 8, and a circuit board for converting thermal resistance signals is installed inside the circuit board cavity 22; a transparent glass plate 9 is installed on one side of the circuit board cavity 22, and the transparent glass plate 9 installed on one side of the circuit board cavity 22 can be used to monitor the operating status of the circuit board inside the circuit board cavity 22 in real time; the conversion module 8 is also provided with a reset button 11, and the reset button 11 arranged on the conversion module 8 is electrically connected to the circuit board inside the circuit board cavity 22. The operating status of the circuit board installed inside the circuit board cavity 22 can be adjusted by the reset button 11 arranged on the conversion module 8, and the conversion module 8 is connected to the reset button 11. A sealing component is installed at the contact position, and the sealing component is used to ensure that water vapor does not enter when the operator operates the reset button 11, and it is not easy to fog up the transparent glass plate 9; in addition, an exhaust component is connected inside the circuit board cavity 22, and the exhaust component is used to balance the air pressure inside the circuit board cavity 22 and prevent water vapor from entering, so as to always maintain the clarity of the transparent glass plate 9; more importantly, a heating component is installed at the inner side of the transparent glass plate 9 near the inside of the circuit board cavity 22, and the heating component is used to quickly heat and evaporate the water mist condensed on the surface of the transparent glass plate 9, so as to always ensure the clarity of the transparent glass plate 9;

[0040] In the embodiment of the present invention, when the instrument with waterproof fog function based on the mathematical model is used, the power connection module 3 is connected to the power supply, the thermal resistance signal of the instrument to be detected is received, and the conversion module 8 is connected. After receiving the thermal resistance signal of the instrument to be detected, the power connection module 3 transmits it to the conversion module 8;

[0041] The circuit board installed inside the circuit board cavity 22 opened by the conversion module 8 receives the thermal resistance signal, and then transmits it through isolation, and outputs standard current and voltage signals to the control room. Based on the digital model of the control room, it is used to monitor the instrument to be tested in real time, and when an electrical fault occurs in the instrument, an early warning can be issued in time;

[0042] At the same time, when the circuit board inside the conversion module 8 is powered on and running, the running state of the circuit board inside the circuit board cavity 22 can be observed in real time through the installed transparent glass plate 9; in addition, through the cooperation of the provided sealing component, exhaust component and heating component, the water mist at the position of the transparent glass plate 9 can be removed to always maintain the clarity of the transparent glass plate 9;

[0043] Please refer to the positioning block 14 in the figure. In one embodiment of the present invention, the power connection module 3 is in a Π shape, and the wire holes 4 are symmetrically installed on both sides of the power connection module 3. The installed wire holes 4 are used to simultaneously connect the power line and the thermal resistance signal line of the electrical appliance to be detected; the inner side of the power connection module 3 forms an alignment groove 5, and the size of the formed alignment groove 5 is adapted to the size of one side of the conversion module 8, and the formed alignment groove 5 is used to install the conversion module 8; at the same time, the alignment power connection jack 6 and the signal contact plate 7 are arranged on the upper and lower inner walls of the alignment groove 5, and the conversion module 8 is provided with an alignment power connection plug block and a signal receiving plate at corresponding positions on one side;

[0044] In the embodiment of the present invention, when the power connection module 3 and the conversion module 8 are assembled to form a complete instrument with a waterproof fog function based on a mathematical model, one side of the conversion module 8 is inserted into the alignment groove 5 formed on the inner side of the power connection module 3, that is, the alignment power connection plug block set on one side of the conversion module 8 is inserted into the alignment power connection socket 6, and the signal receiving plate set on one side of the conversion module 8 is aligned with the signal contact plate 7 and pressed into contact; at the same time, the power signal line and the thermal resistance signal line are connected at the positions of the wire holes 4 symmetrically installed on both sides of the power connection module 3; and the thermal resistance signal of the instrument to be tested is converted;

[0045] Specifically, in the embodiment of the present invention, positioning blocks 1 are symmetrically installed on one side of the power connection module 3, and slots are formed between the symmetrically installed positioning blocks 1; at the same time, positioning holes 2 are formed on the surface of the positioning blocks 1, and the positioning holes 2 formed on the surface of the positioning blocks 1 are used to pass bolts to fix the entire power connection module 3;

[0046] In the embodiment of the present invention, for example, when installing the entire instrument with waterproof fog function based on the mathematical model, the positioning block 1 installed on one side of the power connection module 3 is inserted into the designated installation point through the formed card slot, and then the bolt is passed through the positioning hole 2 and the wall of the installation point at the same time, so that the entire instrument with waterproof fog function based on the mathematical model can be fixed;

[0047] Please refer to the positioning block 16 in the figure. In one embodiment of the present invention, a wiring slot 12 is provided on one side of the conversion module 8. A wiring board is installed inside the wiring slot 12. The wiring board is electrically connected to the circuit board installed inside the circuit board cavity 22. The position where the wiring board is connected to the circuit board cavity 22 is sealed. At the same time, a sealing plate 13 is movably installed on one side of the conversion module 8 at the position where the wiring slot 12 is provided.

[0048] In the embodiment of the present invention, the wiring board installed at the position of the wiring slot 12 can output the standard current and voltage signals after the thermal resistance signal is isolated and transmitted; the sealing plate 13 provided at the same time has two functions, one is to compact the signal line connected at the position of the wiring slot 12, and the other is to seal the position of the wiring slot 12 when the signal line is not connected, so as to prevent water vapor from entering the inside of the conversion module 8, and ensure that the transparent glass plate 9 is not easy to fog up in the later stage;

[0049] See also Figure 5 In one embodiment of the present invention, the sealing assembly provided at the position of the reset button 11 of the conversion module 8 includes a key combination 14 and a T-shaped pressure plate 15, and a crucible sheet 17 is provided on the circuit board located inside the circuit board cavity 22, and the crucible sheet 17 is in an arc shape; the T-shaped pressure plate 15 is in a T-shape, and one side of the T-shaped pressure plate 15 is in compression contact with one side of the crucible sheet 17;

[0050] A key combination 14 is installed at the other end of the T-shaped pressure plate 15, and a reset button 11 is provided at one end of the key combination 14. The reset button 11 is slidably installed in the reset cavity formed inside the conversion module 8, and the reset cavity is installed with plastic blocks 16 at positions corresponding to both sides of the reset button 11. The installed plastic blocks 16 are used to prevent the movable reset button 11 from escaping from the reset cavity; at the same time, a compression spring is sleeved on the outer side of the key combination 14;

[0051] In the embodiment of the present invention, when the operator applies force to the position of the reset button 11 to control the operation state of the circuit board installed inside the circuit board cavity 22, the operator presses the position of the reset button 11 to push the reset button 11 to slide inside the reset cavity. When the reset button 11 slides, the key combination 14 will be driven to push the T-shaped pressure plate 15 to slide, and then the crucible sheet 17 will be squeezed downward to act on the position of the circuit board to control the operation state of the circuit board installed inside the circuit board cavity 22; at the same time, the compression spring set on the outer side of the key combination 14 will also deform to produce elastic variables;

[0052] Since the two sides of the reset button 11 are in extrusion contact with the two sides of the inner wall of the reset cavity, and the plastic stoppers 16 are symmetrically installed on the two sides of the upper end of the reset cavity, it is difficult for external water vapor to enter the reset cavity when the reset button 11 slides and moves; and the reset cavity gradually narrows at the contact position with the key assembly 14, so it is even more difficult for water vapor to pass through the reset cavity and enter the circuit board cavity 22;

[0053] After the reset button 11 stops acting, the key combination 14 is restored to the initial state under the elastic variable generated by the deformed compression spring, and the T-shaped pressure plate 15 squeezes and seals the position where the key combination 14 is connected to the circuit board cavity 22, so it is not easy for water vapor to pass through the reset cavity into the circuit board cavity 22 and generate water mist at the position of the transparent glass plate 9 installed on one side of the circuit board cavity 22;

[0054] See also Figure 6 In one embodiment of the present invention, the exhaust assembly includes a bent exhaust hole 19, a return hole 20 and an exhaust pipe 21, one end of the exhaust pipe 21 is connected to the inside of the circuit board cavity 22, the other end of the exhaust pipe 21 is connected to one end of the bent exhaust hole 19, the bent position at the bottom of the bent exhaust hole 19 is connected to the return hole 20, and a sealing plug is installed inside the end portion of the return hole 20 after one end passes through the inner wall of the conversion module 8; a waterproof breathable membrane 18 is installed inside the end portion of the bent exhaust hole 19 after one end passes through the inner wall of the conversion module 8;

[0055] In the embodiment of the present invention, by connecting the exhaust pipe 21 and the bent exhaust hole 19 inside the circuit board cavity 22 opened inside the conversion module 8, and installing the waterproof breathable membrane 18 inside the bent exhaust hole 19, the circuit board installed inside the circuit board cavity 22 can be ventilated and dissipated in time when powered on and the air pressure inside the circuit board cavity 22 can be balanced with the outside air pressure; and the waterproof breathable membrane 18 installed inside the bent exhaust hole 19 can prevent the entry of water vapor, and this design can not only maintain the clarity of the instrument, but also extend its service life; and by connecting the reflux hole 20 at the bending position of the bent exhaust hole 19, a small amount of water vapor that enters the bent exhaust hole 19 can be condensed and discharged through the connected reflux hole 20. This can further prevent water vapor from entering the circuit board cavity 22;

[0056] The waterproof breathable membrane 18 arranged inside the bent vent hole 19 is a polymer material that can achieve both waterproof and breathable functions. The waterproof breathable membrane 18 is a hydrophilic membrane: it has no physical micropores, is composed of a copolymer, and has soft segments and hard segments. The hard segments prevent water droplets from passing through and play a waterproof role, and the soft segments play a breathable role.

[0057] The waterproof principle is that when water vapor condenses into water droplets, the particles become larger. Due to the surface tension of the water droplets, the particle size of the water droplets is much larger than the diameter of the micropores of the waterproof breathable membrane. Therefore, water molecules cannot smoothly break away from the water droplets and penetrate to the other side, thus preventing water penetration.

[0058] The breathable principle: the distance between gas molecules is large, and they can pass through the pores of the waterproof breathable membrane during diffusion movement;

[0059] See also Figure 1 and Figure 3 In one embodiment of the present invention, the heating component includes an electric heating paint strip 10, which is printed and pasted on the inner surface of the transparent glass plate 9 to form a group of parallel lines, and the distance between two adjacent electric heating paint strips 10 is about 1 cm, and a parallel circuit is formed;

[0060] In the embodiment of the present invention, for example, in order to maintain the clarity of the transparent glass plate 9, when it is necessary to eliminate the fog and frost on the surface of the transparent glass plate 9 or to prevent the condensation of water, after the electric heating paint strips 10 arranged vertically are powered on, the electric heating paint strips 10 are powered on and heated to generate heat to evaporate the fog or frost on the car window;

[0061] The electrothermal paint strip 10 is mainly composed of a conductive filler, a binder, a solvent and an additive, wherein the conductive filler is responsible for providing conductive properties, the binder is used to fix the conductive filler on the substrate, the solvent is used to adjust the viscosity and fluidity of the paint, and the additive is used to improve the properties of the paint;

[0062] The working principle of the electric heating paint strip 10 is to use the conductive properties of its conductive coating to convert electrical energy into thermal energy. When the paint is energized, the free electrons in the conductive filler move in a directional manner under the action of the electric field to form an electric current. When the current passes through the resistor, heat is generated, thereby causing the paint to heat up;

[0063] See also Figure 7 , the wiring of the above-mentioned instrument with waterproof fog function based on the mathematical model; the input and output specifications of the instrument with waterproof fog function based on the mathematical model are shown in Table 1:

[0064] Table 1

[0065]

[0066] Technical parameters of the instrument with anti-fog function based on mathematical model:

[0067] Input terminal: Input signal: PT100, Cu50, Ni1000 and other thermal resistance signals; Allowable line resistance: ≤22Ω;

[0068] Output terminal: output signal: 4-20mA; 0-20mA; 0-5V; 0-10V; output load resistance: RL≤5009 (when the output is a current signal), RL≥10KQ (when the output is a voltage signal);

[0069] Basic parameters: Power supply: DC24V; Voltage range: DC18-36V;

[0070] Current consumption: ≤50mA (one input and one output, 24V power supply, 20mA output); ≤70mA (one input and two outputs, 24V power supply, 20mA output);

[0071] Over-limit alarm: below the lower temperature limit, output 3.8mA (4-20mA output); above the upper temperature limit, output 20.5mA; disconnection alarm: output 22mA;

[0072] Insulation strength: 1500V AC / 1min (between input, output and power supply); Insulation resistance: ≥100MQ (between input, output and power supply);

[0073] See also Figure 7 , the wiring of the instrument with waterproof fog function based on the mathematical model:

[0074] Note: One-input and one-output only includes the part of channel 1; One-input and two-output only includes the input of channel 1;

[0075] When a two-wire thermal resistor signal is input, terminals 2, 3, 5, and 6 (2-input and 2-output) must be short-circuited; when a three-wire thermal resistor signal is input, the resistance values ​​of the three wires must be equal as much as possible;

[0076] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Instruments and meters with waterproof fog function based on mathematical models, including: A power connection module (3) for connecting an external power source and receiving and transmitting a thermal resistance signal of an instrument to be detected, and a conversion module (8) for isolating and transmitting the thermal resistance signal output by the power connection module (3) and outputting a standard current and voltage signal to a control room, and for real-time monitoring of the instrument to be detected based on a digital model of the control room, and for giving a timely warning when an electrical fault occurs in the instrument; the conversion module (8) is installed on one side of the power connection module (3) and is electrically connected to the power connection module (3); and is characterized in that: A circuit board cavity (22) is formed inside the conversion module (8), a circuit board for converting thermal resistance signals is installed inside the circuit board cavity (22), and a transparent glass plate (9) is installed on one side of the circuit board cavity (22); a reset button (11) is also provided on the conversion module (8), the reset button (11) disposed on the conversion module (8) is electrically connected to the circuit board inside the circuit board cavity (22), and a sealing component is installed on the conversion module (8) at a position in contact with the reset button (11); In addition, an exhaust component is connected to the inside of the circuit board cavity (22), and a heating component is installed at a position on the inner side of the transparent glass plate (9) close to the inside of the circuit board cavity (22).

2. The instrument with waterproof fog function based on mathematical model according to claim 1 is characterized in that: The power connection module (3) is in a Π shape, and wire holes (4) are symmetrically distributed on both sides of the power connection module (3); an alignment groove (5) is formed on the inner side of the power connection module (3), and the size of the formed alignment groove (5) is adapted to the size of one side of the conversion module (8); at the same time, alignment power connection plug holes (6) and a signal contact plate (7) are arranged on the upper and lower inner walls of the alignment groove (5), and an alignment power connection plug block and a signal receiving plate are respectively arranged at corresponding positions on one side of the conversion module (8).

3. The instrument with waterproof fog function based on mathematical model according to claim 2 is characterized in that: Positioning blocks (1) are symmetrically installed on one side of the power connection module (3), and slots are formed between the symmetrically installed positioning blocks (1); and positioning holes (2) are formed on the surfaces of the positioning blocks (1).

4. The instrument with waterproof fog function based on mathematical model according to claim 1, characterized in that: A wiring slot (12) is provided on one side of the conversion module (8), a wiring board is installed inside the wiring slot (12), the wiring board is electrically connected to a circuit board installed inside the circuit board cavity (22), and the position where the wiring board and the circuit board cavity (22) are connected is sealed; at the same time, a sealing plate (13) is movably installed on one side of the conversion module (8) at the position where the wiring slot (12) is provided.

5. The instrument with waterproof fog function based on mathematical model according to claim 1, characterized in that: The sealing component arranged at the position of the reset button (11) of the conversion module (8) comprises a key combination (14) and a T-shaped pressure plate (15); a crucible sheet (17) is arranged on the circuit board located inside the circuit board cavity (22); the crucible sheet (17) is in an arc shape; the T-shaped pressure plate (15) is in a T shape, and one side of the T-shaped pressure plate (15) is in compression contact with one side of the crucible sheet (17); the key combination (14) is installed at the other end of the T-shaped pressure plate (15); a reset button (11) is arranged at one end of the key combination (14); the reset button (11) is slidably installed inside the reset cavity formed inside the conversion module (8), and the reset cavity is installed with plastic blocks (16) at positions corresponding to both sides of the reset button (11); and a compression spring is sleeved on the outside of the key combination (14).

6. The instrument with waterproof fog function based on mathematical model according to claim 1, characterized in that: The exhaust assembly comprises a bent exhaust hole (19), a return hole (20) and an exhaust pipe (21); one end of the exhaust pipe (21) is connected to the inside of the circuit board cavity (22); the other end of the exhaust pipe (21) is connected to one end of the bent exhaust hole (19); the bent position at the bottom end of the bent exhaust hole (19) is connected to the return hole (20); a sealing plug is installed inside the end portion of the return hole (20) after one end passes through the inner wall of the conversion module (8); and a waterproof breathable membrane (18) is installed inside the end portion of the bent exhaust hole (19) after one end passes through the inner wall of the conversion module (8).

7. The instrument with waterproof fog function based on mathematical model according to claim 1, characterized in that: The heating component comprises an electric heating paint strip (10), which is printed and pasted on the inner surface of the transparent glass plate (9) to form a group of parallel lines. The distance between two adjacent electric heating paint strips (10) is about 1 cm, and a parallel circuit is formed.

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