KR102082458B1 - Power supply for driving dental x-ray cameras with comprehensive status detection, indication and notification - Google Patents

Abstract

The present invention relates to a power supply device for driving a dental X-ray photographing device performing comprehensive status detection, display and notification functions and, particularly, to a power supply device for driving a dental X-ray photographing apparatus comprising: a filter; a surge protective circuit (1); a PFC converter (2); a high voltage portion electrolytic capacitor (3); a DC-DC converter (4); and a low voltage portion electrolytic capacitor (5). The power supply device for driving a dental X-ray photographing device further comprises: a peripheral temperature detection sensor (6); high voltage portion and low voltage portion capacitor temperature detection sensors (7, 8); high voltage portion and low voltage portion ripple current detection units (9, 10); high voltage portion and low voltage portion overcurrent detection units (11, 12); high voltage portion and low voltage portion overvoltage detection units (13, 14); a capacitor data memory unit (15); a capacitor driving time counting unit (16); a microcomputer (17); a notification unit (18); and a comprehensive status display unit (19). Therefore, according to the present invention, maintenance can be performed in advance by predicting a replacement and failure period of an internal component such as an electrolytic capacitor and the like as well as the power supply device for driving a dental X-ray photographing device itself, thereby preventing a damage to an electrolytic capacitor due to expiration of lifespan of a phase advance electrolytic capacitor including failure of each component due to overvoltage and overcurrent and the like, and power failure and fire risk by explosion.

Description

Power supply for driving dental x-ray cameras with comprehensive status detection, indication and notification

The present invention relates to a power supply for driving a dental X-ray imaging apparatus having a comprehensive state detection, display and notification function, and more specifically, to treat teeth and various periodontal diseases, or to correct orthodontics, implantation of teeth, etc. Detection of overcurrent, overvoltage, and electrolytic capacitor usage time inside power supplies (SMPS) used to drive dental x-ray (radiation) cameras, which are widely used in dentistry to identify alveolar bone conditions In addition, by adding and displaying the status information in a predetermined form, it is possible to predict the replacement and failure time of internal components such as the power supply itself as well as the electrolytic capacitor, and to maintain it in advance. The terminal can be operated by performing long-distance or short-range communication through a wireless communication module such as a wired communication module and Bluetooth (BLE). Comprehensive status detection and display so that the status of power supply devices provided in each dental X-ray imager can be accurately identified in real time through the manager of remote site and management room, and the necessary actions can be taken immediately in case of abnormal condition. And it relates to a dental X-ray imaging apparatus driving power supply having a notification function.

In general, the dentist is provided with an X-ray imaging apparatus or CT imaging apparatus for identifying the state of the teeth and alveolar bone for the purpose of treating teeth and various periodontal diseases, orthodontics, dental implants.

The X-ray imaging apparatus and CT imaging apparatus (computed tomography apparatus) transmit specific body data through X-rays to be photographed, and the dental X-ray imaging apparatus is a two-dimensional alveolar bone including a tooth. A panoramic X-ray photographing apparatus for photographing with an enemy plane and an X-ray CT photographing apparatus for capturing precise three-dimensional stereoscopic images as compared with the panoramic X-ray photographing apparatus may be classified.

Each of the X-ray imaging apparatus or the CT imaging apparatus is provided with a power supply device. In particular, in the case of a power supply for driving the X-ray imaging apparatus, a power factor corrector (PFC) converter is input by receiving a voltage of AC 90V to 240V. It boosts and rectifies to a non-isolated DC voltage (for example, DC 380V), and converts and rectifies to another isolated DC voltage (for example, DC 24V) through a DC-DC converter. Function to supply the driving voltage to the

In more detail, the power supply device is classified into a linear type and a switching type power supply, and among them, a switching mode power supply (SMPS), a " switching power source " Unlike the linear system, the "supply device" has a small size, high efficiency, and stable output.

The switching power supply includes a power factor correction (PFC) circuit for harmonic reduction, which is applied by applying high frequency switching to a rectifier for converting alternating current into direct current to design a high efficiency power supply. As a type of rectifier, the recent harmonization of harmonics is becoming more common and obligatory to use power factor correction circuits in various electric and electronic products.

When converting 50 ~ 60Hz AC input voltage in high efficiency by high frequency switching operation of 40-100kHz in switching power supply, a smoothing capacitor is used in power factor improvement circuit to obtain stable DC voltage.

In general, the smoothing capacitor is an aluminum electrolytic capacitor which can manufacture a large capacity capacitor at a low price, and when the aluminum electrolytic capacitor is used in a high temperature sealed environment such as in a switching power supply, the electrolyte is evaporated. do.

Since the evaporation of the electrolyte reduces the capacity of the capacitor, the capacity of the capacitor decreases with time, and thus the ripple of the output voltage of the rectifier increases.

In other words, if the switching power supply is used for a certain time, the capacity of the smoothing capacitor is reduced and excessive ripple voltage and current are generated. Excessive ripple changes the characteristics of the switching power supply and causes major failures in the system. Cause.

In general, the lifespan of the smoothing capacitor used in the switching power supply is about 2 years for the 85 degree standard and about 7 years for the 105 degree standard, and there is a big gap in the life of the capacitor depending on the temperature.

At this time, the electrolytic capacitor provided in the power supply device provides energy storage function and AC energy supply and inorganicization, smoothes the amount of power that changes rapidly, and blocks DC component, AC component passing function and noise signal. Perform the function.

In addition, the structural cause of the reduction of the life of the electrolytic capacitor can present a voltage and leakage current above the breakdown voltage, and the use time and the temperature can be presented as a cause according to the use environment.

In terms of the structural aspect, the electrical breakdown voltage is proportional to the physical properties and thickness (distance between the electrodes) of the insulator (separator) used to separate the thin film electrodes between + and-, and the leakage current fills between the thin films. It is related to the purity of the electrolyte, and since 100% purity does not exist on the earth, leakage is caused by the conductive material included in the electrolyte or aluminum particles separated from the thin film (electrode), and the electrolyte dries out due to the heat generated by the electrolyte. The dose is gradually reduced because it is thrown away.

Nevertheless, in the case of an overcurrent or an overvoltage caused by an abnormality occurring in a dental X-ray imager which is a load including a specific part among numerous components provided in the conventional dental x-ray imager driving power supply, It is not equipped with the function of detecting and displaying and notifying the status information in a predetermined form, and the life of the electrolytic capacitor having the characteristic that the service life is determined and its life is sharply shortened as the temperature increases. There is no function for predicting, displaying and informing.

That is, in the conventional dental X-ray imaging apparatus driving power supply, the state information including the function of detecting the overvoltage and overcurrent, as well as the temperature and ripple voltage and current of the electrolytic capacitor to predict replacement time and failure of internal components. Because it is not equipped with a function to remotely notify the user, it is not possible to accurately grasp the state of the power supplies provided in each of the dental X-ray cameras in real time, and it is not possible to immediately take necessary measures in the event of an abnormal condition such as a failure. There is a problem that can give a lot of inconvenience to the patients.

Domestic Patent Publication No. 10-1910813 (October 17, 2018) Domestic Patent Publication No. 10-1572755 (November 23, 2015) Domestic Patent Publication No. 10-1316972 (October 02, 2013) Domestic Patent Publication No. 10-1019342 (February 24, 2011)

The present invention has been made to solve such a conventional problem, which is widely used in dentistry to determine the condition of the teeth and alveolar bone for the purpose of treating teeth and various periodontal diseases, orthodontics, tooth transplantation, etc. In addition to the detection of overcurrent, overvoltage, and electrolytic capacitor usable time (i.e., remaining life) inside power supplies (SMPS) used to drive dental X-ray (radiation) imaging equipment, It adds the function to display and inform in a fixed form, and predicts the replacement and failure time of internal components such as the electrolytic capacitor as well as the power supply itself, and enables maintenance in advance, so that the failure of each component due to overvoltage and overcurrent Power failure and fire due to damage and explosion of the electrolytic capacitor due to the expiration of the life of the advanced electrolytic capacitor, including An object of the present invention is to provide a dental X-ray imaging apparatus driving power supply having a comprehensive state detection, display and notification function that can prevent the risk of occurrence.

Another object of the present invention, further comprising a wired communication module, such as RS232 and a wireless communication module, such as Bluetooth (BLE), in real time through a monitor in the manager and management room of a remote site carrying the terminal through a remote or near field communication Reliability and maintenance of dental X-ray radiators by allowing managers to accurately identify the status of power supplies in each of the X-ray radiators and to take necessary measures immediately in the event of abnormal conditions The present invention provides a power supply device for driving dental x-ray cameras with comprehensive state detection, display, and notification functions, which can greatly increase the utilization of radiographic cameras and significantly improve the reliability of the product itself. .

Other detailed objects of the present invention will be apparent to those skilled in the art through the detailed description described below, and will be understood.

The present invention for achieving the above object is a filter and surge protection circuit to remove the surge voltage, including a variety of noise signals introduced into the input voltage of AC 90V ~ 240V; A power factor corrector (PFC) converter that boosts and rectifies the AC voltage input through the filter and surge protection circuit to a non-isolated DC voltage (for example, DC 380V) and provides the driving voltage to a dental X-ray imager as a load; A high voltage part electrolytic capacitor having a form provided in parallel to an output part of the PFC converter and compensating and improving the power factor of the high voltage part; A DC-DC converter which converts and rectifies a relatively low insulated DC voltage (for example, DC 24V) relative to the non-isolated DC voltage output from the PFC converter and provides the driving voltage to a dental X-ray imager as a load; A power supply for driving a dental X-ray imaging apparatus comprising: a low pressure part electrolytic capacitor having a form installed in parallel to an output part of the DC-DC converter and compensating and improving the power factor of the low pressure part. An ambient temperature detection sensor for detecting (T) in real time and transferring it to the microcomputer; A high pressure unit and a low pressure unit condenser temperature detection sensor having a form installed in close proximity to the high pressure unit electrolytic capacitor and the low pressure unit electrolytic capacitor, respectively, and detecting the temperature of the high pressure unit and the low pressure unit electrolytic capacitor in real time and transmitting the same to the microcomputer; A high voltage unit and a low pressure unit ripple current detector having a form connected in series to the high voltage unit electrolytic capacitor and the high pressure unit electrolytic capacitor, respectively, for detecting ripples included in current flowing through the high pressure unit and the low pressure unit electrolytic capacitor and transmitting the ripple to a microcomputer; It detects the current flowing in the load in real time between the power output part of the PFC converter and the DC-DC converter and the power input part of the load, and delivers it to the microcomputer when a current exceeding a predetermined overcurrent limit value flows to the load. A high voltage section and a low voltage section overcurrent detector; The high voltage part and the low voltage that are connected in parallel to the power output of the PFC converter and the DC-DC converter and detect the voltage applied to the load in real time, and transfer the voltage to the microcomputer when a voltage greater than a predetermined overvoltage limit is applied to the load. A negative overvoltage detector; Guaranteed life (Lo), maximum operating temperature (To), and exothermic temperature (ΔT) of the capacitor element due to its own ripple current and temperature difference correction coefficient A condenser data storage unit for storing data for (K) and providing it when requested by the microcomputer; A condenser driving time counting unit for counting driving times of the high and low voltage electrolytic capacitors in real time; When the power supply is in operation, the ambient temperature of the power supply unit is measured from the ambient temperature detection sensor, the high pressure unit and the low pressure unit condenser temperature detection sensor, the high pressure unit and the low pressure unit ripple current detector, the high pressure unit and the low pressure unit overcurrent detector, the high voltage unit and the low voltage unit overvoltage detector. As a result of real-time input of real temperature, ripple current, overcurrent and overvoltage status information of the electrolytic capacitor of the high voltage section and the low voltage section, if an over current or over voltage is detected in the high voltage section or the low voltage section, the high voltage section or the low voltage section At the same time, it indicates that an overcurrent is flowing or an overvoltage is applied and displays the life expectancy of each electrolytic capacitor according to the exothermic temperature of the current electrolytic capacitors by using the life expectancy calculation formula for the electrolytic capacitor stored in itself. Display on the comprehensive status display, A microcomputer that notifies a specific electrolytic capacitor when the life of the capacitor is notified; In response to the output signal of the microcomputer, a warning sound or a voice informs the overcurrent or overvoltage state of the high voltage section or the low voltage section, and the electrolytic capacitor of any one of the electrolytic capacitors installed in the low voltage section or the high voltage section has reached the end of its life. Notification unit for notifying that the end of life; In response to the output signal of the microcomputer, the overcurrent or overvoltage state of the high voltage unit or the low pressure unit is displayed in different forms, and the expected life (estimated life) of each electrolytic capacitor installed in the low pressure unit or the high voltage unit is displayed in real time. In addition, a comprehensive state display unit for displaying a specific electrolytic capacitor when the end of life; characterized in that it is further provided.

At this time, the life expectancy calculation formula for the electrolytic capacitor performed in the microcomputer,

로 이루어진 것을 특징으로 한다.

Characterized in that consisting of.

Here, Lx (hours) is the estimated life of each electrolytic capacitor according to the exothermic temperature of the current electrolytic capacitors, Lo (hours) is the guaranteed life for the life at the maximum use temperature, the To (℃) is the maximum use Temperature, and Tx (° C.) is the actual temperature of the electrolytic capacitor, and ΔT (° C.) is the heat generation temperature at the center of the capacitor element due to its own ripple current, wherein ΔT = K (surface temperature (Ts) −ambient). Temperature (T).

In addition, the high-voltage capacitor and the high-voltage capacitor ripple current detector, the high voltage portion overcurrent detector, and the output portion of the high voltage portion overvoltage detector and the input of the microcomputer block the electrical interference that may occur between the high voltage portion and the low voltage portion and at the same time It is further characterized by an insulated signal transmission unit which electrically insulates the signal detected by the temperature detection sensor, the high voltage unit ripple current detector, the high voltage unit overcurrent detector, and the high voltage unit overvoltage detector to accurately deliver the microcomputer driven by the low voltage. do.

The microcomputer communication output unit may further include a wired and wireless communication module for wired and wireless communication with a computer provided in a user portable terminal or a remote control room.

At this time, the wired and wireless communication module of the wired communication module RS232 is installed, the wireless communication module is characterized in that the Bluetooth installed.

In addition, the integrated state display unit is composed of a plurality of color light emitting diodes and segments for life expectancy display, and the overcurrent and overvoltage are divided into high and low voltage parts and normal and abnormal, and are displayed in different colors. The low pressure part and the normal and check ready and breakdown divided into different colors, as well as the expected life is characterized in that the number can be displayed.

In addition, the microcomputer transmits and stores various state information in each power supply device to a remote server in real time through a wireless router (AP) connected to a wired / wireless communication module, so that administrators can be identified through the server regardless of the place. Characterized in that it is possible to check the status information for each of the power supply devices provided in the plurality of dental X-ray imager that is a load installed in the dentist.

As described above, according to the dental X-ray imaging apparatus driving power supply having a comprehensive state detection, display, and notification function of the present invention, the teeth and the like for treating teeth and various periodontal diseases, orthodontics, implantation, etc. Overcurrent, overvoltage, and electrolytic capacitors available time (SMPS) inside the power supplies (SMPS) used to drive dental X-ray (D-Ray) radiators, which are widely used in dentistry to determine the condition of the alveolar bone. In addition to the detection function and the function of displaying and notifying their status information in a predetermined form, it is possible to predict the replacement and failure time of internal components such as the power supply itself as well as the electrolytic capacitor, This can lead to the expiration of the life of the lead-acid electrolytic capacitors, including failure of each component due to overvoltage and overcurrent. A delivery it is possible to prevent a power failure or fire risk of damage and explosion of the capacitor in advance.

In addition, the present invention further includes a wired communication module such as RS232 and a wireless communication module such as Bluetooth (BLE), and the managers in real time through a remote place manager and a monitor in a management room carrying the mobile terminal through long-distance or near field communication. Reliability and maintenance of dental X-ray radiators for each dental X-ray radiator by accurately identifying the status of the power supplies provided in each of the dental x-ray radiators and immediately taking necessary measures in the event of abnormal conditions It is a very useful invention that not only can greatly increase their utilization, but also greatly improve the reliability of product quality and quality of the product itself.

Other effects of the present invention will be apparent to and understood by those skilled in the art through the following detailed description or during the process of carrying out the present invention.

1 is a schematic overall block diagram of a power supply for driving a dental x-ray apparatus to which the present invention is applied.
Figure 2 is a block diagram of a state in which the dental X-ray imagers having a power supply device to which the present invention is applied are interconnected with a server through a wireless router.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described in the specification, and that one or more other features It should be understood that it does not exclude in advance the possibility of the presence or addition of numbers, steps, operations, components, parts or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram showing a schematic block diagram of a power supply apparatus for driving a dental x-ray apparatus to which the present invention is applied, and FIG. 2 shows a dental x-ray imager having a power supply apparatus to which the present invention is applied to a server through a wireless router. Shows a block diagram of the interconnected state.

According to the present invention,

A filter and surge protection circuit (1) for removing a surge voltage including various noise signals included in an input voltage of AC 90V to 240V; A PFC converter which boosts and rectifies an AC voltage input through the filter and surge protection circuit 1 to a non-isolated DC voltage (for example, DC 380V) and provides a driving voltage to a dental X-ray imager as a load 30 ( 2) and; A high voltage part electrolytic capacitor (3) having a form provided in parallel to an output part of the PFC converter (2) and compensating and improving the power factor of the high pressure part; DC- which converts and rectifies into an insulated DC voltage (for example, DC 24V), which is relatively lower than the non-isolated DC voltage output from the PFC converter 2, and provides it as a driving voltage to the dental X-ray imager which is the load 30. A DC converter 4; In the parallel to the output portion of the DC-DC converter (4), a low-pressure portion electrolytic capacitor (5) for compensating and improving the power factor of the low-pressure portion; comprising a power supply for driving a dental X-ray

An ambient temperature detection sensor 6 having a form installed in a case (not shown) of the power supply device and detecting an ambient temperature T in real time and transferring the same to a microcomputer;

The high pressure part electrolytic capacitor (3) and the low pressure part of the electrolytic capacitor (5) has a form respectively installed, and detects the temperature of the high pressure part and the low pressure part electrolytic capacitor (3) (5) in real time to transfer to the microcomputer (17). A high pressure unit and a low pressure unit condenser temperature detection sensor (7) (8);

The microcomputer 17 has a form connected in series with each of the high voltage part electrolytic capacitor 3 and the high voltage part electrolytic capacitor 3, and detects the ripples included in the current flowing through the high voltage part and the low pressure part electrolytic capacitor 3, 5, respectively. A high pressure unit and a low pressure unit ripple current detector 9 and 10 which are transmitted to the unit;

It has a form connected in series between the power output unit of the PFC converter 2 and the DC-DC converter 4 and the power input unit of the load 30, and detects a current flowing in the load 30 in real time, and then determines an overcurrent limit value. A high voltage part and a low voltage part overcurrent detectors 11 and 12 which transmit the above current to the microcomputer 17 when the current flows in the load 30;

The PFC converter 2 and the DC-DC converter 4 have a form connected in parallel to the power output, and detects the voltage applied to the load 30 in real time, the voltage over the predetermined overvoltage limit value is the load 30 A high voltage part and a low voltage part overvoltage detector 13 and 14 which transmit the same to the microcomputer 17 when applied to the microcomputer 17;

Guaranteed life (Lo), maximum service temperature (To), and heat generation temperature at the center of the condenser element due to its own ripple current for the high and low voltage electrolytic capacitors (3) (5). A condenser data storage section 15 storing various data such as T) and a temperature difference correction coefficient K and providing the data when the microcomputer 17 requests them;

A capacitor driving time counting unit (16) for counting driving times of the high and low voltage electrolytic capacitors (3) (5) in real time;

The ambient temperature detection sensor 6 and the high and low voltage condenser temperature detection sensors 7 and 8, the high and low voltage ripple current detectors 9 and 10, and the high and low voltage over-current detectors when the power supply is operated. (11) (12), real-time information of the ambient temperature of the power supply detected from the high voltage section and the low voltage section overvoltage detectors 13 and 14 and the actual temperature, ripple current, overcurrent and overvoltage state information of the electrolytic capacitor of the high voltage section and the low voltage section As a result of input, if an overcurrent or overvoltage is detected in the high voltage section or the low voltage section, it indicates that an overcurrent is flowing or the overvoltage is being applied in the high voltage section or the low voltage section through the notification unit 18 or the comprehensive status display unit 19. The electrolytic capacitors can be displayed at the same time as the notification, as well as using the life expectancy calculation formula for the electrolytic capacitors stored in the memory. A microcomputer 17 for calculating the estimated lifespan of the display unit and displaying it on the integrated state display unit 19, and notifying the notification unit 18 of the end of the life of a specific electrolytic capacitor;

In response to the output signal of the microcomputer 17, the warning signal or sound of the high voltage portion or the low voltage portion of the overcurrent or overvoltage state, as well as any one of the electrolytic capacitors installed in the low voltage portion or the high voltage portion when the lifetime of the corresponding A notification unit 18 for correctly indicating that the electrolytic capacitor has reached the end of its life;

In response to the output signal of the microcomputer 17, the overcurrent or overvoltage state of the high voltage unit or the low pressure unit is displayed in different forms, and the expected life (estimated life) of each electrolytic capacitor installed in the low pressure unit or the high voltage unit is displayed in real time. It is characterized in that it further comprises a general state display unit 19 to display and to display exactly when the life of a specific electrolytic capacitor has reached the end.

At this time, the life expectancy calculation formula for the electrolytic capacitor performed by the microcomputer 17,

로 이루어진 것을 특징으로 한다.

Characterized in that consisting of.

Here, Lx (hours) is the estimated life of each electrolytic capacitor according to the exothermic temperature of the current electrolytic capacitors, Lo (hours) is the guaranteed life for the life at the maximum use temperature, the To (℃) is the maximum use Temperature, and Tx (° C.) is the actual temperature of the electrolytic capacitor, and ΔT (° C.) is the heat generation temperature at the center of the capacitor element due to its own ripple current, wherein ΔT = K (surface temperature (Ts) −ambient). Temperature (T).

In addition, between the high voltage section and the low voltage section between the output of the high voltage section condenser temperature detection sensor 7 and the high voltage section ripple current detection section 9, the high voltage section overcurrent detection section 11, and the high voltage section overvoltage detection section 13 and the input section of the microcomputer 17. In addition to blocking electrical interference that may occur at the same time, the signals detected by the high voltage section capacitor temperature detection sensor 7, the high voltage section ripple current detector 9, the high voltage section overcurrent detector 11, and the high voltage section overvoltage detector 13 are respectively In order to accurately deliver to the microcomputer 17 driven by the electrically insulated signal transmission unit 20 is characterized in that it further installed.

In addition, the communication output unit of the microcomputer 17 is further provided with a wired and wireless communication module 21 for wired and wireless communication with the computer 50 provided in the user portable terminal 40 or the remote control room. It is done.

At this time, the wired and wireless communication module 21 of the wired communication module is characterized in that the RS232 is installed, the wireless communication module is installed Bluetooth.

In addition, the integrated state display unit 19 is composed of a plurality of color light emitting diodes and life expectancy display segments, and the overcurrent and overvoltage are divided into high and low voltage portions and normal and abnormal, and are displayed in different colors. Is divided into high and low pressure parts and normal and check preparation and failure to display in different colors as well as the life expectancy can be displayed by numbers.

In addition, the microcomputer 17 transmits and stores various state information in each power supply device to the remote server 60 in real time through the wireless router 22 connected to the wired / wireless communication module 21 and the manager. Regardless of the location, it is characterized in that through the server 60 can check the status information for each of the power supply devices provided in each of the plurality of dental X-ray imager that is the load 30 installed in a specific dentist .

When described in detail with reference to the accompanying drawings the effects of the power supply for driving a dental X-ray imaging apparatus having a comprehensive state detection and display and notification of the present invention configured as described above are as follows.

First, as shown in FIG. 1, the power supply apparatus of the dental X-ray imaging apparatus to which the present invention is applied basically includes a filter and surge protection circuit 1, a PFC converter 2, a high voltage electrolytic capacitor 3, and a DC-. It has the form provided with the DC converter 4 and the low voltage part electrolytic capacitor 5. As shown in FIG.

At this time, the filter and the surge protection circuit 1 includes a noise removing filter and a surge protection element, and removes a surge voltage including various noise signals introduced into an AC input voltage of AC 90V to 240V. Do this.

In addition, the PFC converter 2 includes a power factor improving circuit, a plurality of switch elements, and the like. The non-isolated DC voltage (for example, AC 90 V to 240 V) input through the filter and surge protection circuit 1 may be used. For example, DC 380V) is boosted and rectified to provide a driving voltage to the dental X-ray imager serving as the load 30.

In addition, the high voltage part electrolytic capacitor 3 has a form installed in parallel to the output of the PFC converter 2, and performs the function of compensating and improving the power factor of the high voltage part.

In addition, the DC-DC converter 4 converts and rectifies to an insulated DC voltage (eg, DC 24V) that is relatively lower than the non-isolated DC voltage (eg, DC 380V) output from the PFC converter 2. It performs a function of providing a driving voltage to the dental X-ray imager as a load (30).

In addition, the low voltage part electrolytic capacitor 5 has a form installed in parallel to the output of the DC-DC converter 4, and performs the function of compensating and improving the power factor of the low voltage part.

On the other hand, the present invention is the ambient temperature detection sensor (6) and the high-pressure unit and the low-pressure unit condenser temperature detection sensor (7) (8), the high-pressure unit and the low-pressure unit ripple current detection unit in the power supply device for driving a dental X-ray imaging apparatus known as described above (9) (10). High voltage section and low voltage section overcurrent detectors 11 and 12, high voltage section and low voltage section overvoltage detectors 13 and 14, condenser data storage section 15, capacitor driving time counting section 16, microcomputer 17, notification section (18) and a comprehensive status display unit 19 to predict the replacement and failure time of the internal components such as the electrolytic capacitor, as well as the power supply itself, to enable maintenance in advance, so that each component due to overvoltage and overcurrent The main technical components are to prevent the risk of power outage and fire caused by the damage and explosion of the electrolytic capacitor due to the expiration of the life of the forward electrolytic capacitor, including the failure of the battery.

At this time, the ambient temperature detection sensor 6 has a form installed in a case, etc., not shown in the power supply device, and performs a function of detecting the ambient temperature (T) of the power supply in real time and delivering it to the microcomputer 17. .

In addition, the high pressure unit and the low pressure unit condenser temperature detection sensor (7) (8) has a form respectively installed in close proximity to the high pressure unit electrolytic capacitor (3) and the low pressure unit electrolytic capacitor (5), the heat during operation of the power supply device The high pressure and low pressure electrolytic capacitors (3) (5) to be generated in real time to detect and deliver the function to the microcomputer 17.

Further, the high voltage section and the low voltage section ripple current detection section 9, 10 have a form connected in series to the high voltage section electrolytic capacitor 3 and the high voltage section electrolytic capacitor 3, respectively, and the high voltage section and the low pressure section electrolytic capacitor 3 (5). Detects the ripple currents included in each of the current flowing through the) and delivers the ripple currents to the microcomputer 17.

In addition, the high voltage section and the low voltage section overcurrent detectors 11 and 12 have a form connected in series between the power output section of the PFC converter 2 and the DC-DC converter 4 and the power input section of the load 30, While detecting the current flowing in the dental X-ray imager, which is the load 30, in real time, when a current exceeding a predetermined overcurrent limit value flows to the load 30, the microcomputer 17 delivers it to the microcomputer 17.

In addition, the high voltage unit and the low voltage unit overvoltage detectors 13 and 14 may be connected in parallel to the power output units of the PFC converter 2 and the DC-DC converter 4, and the voltage applied to the load 30. Detects in real time and transmits the voltage to the microcomputer 17 when a voltage greater than a predetermined overvoltage limit is applied to the load 30.

In this case, the high voltage section and the low voltage section overcurrent detectors 11 and 12 and the high voltage section and the low voltage section overvoltage detectors 13 and 14 are not limited thereto and may be installed as general current detectors and voltage detectors to flow to the load 30. Detects the applied current and current in real time and delivers it to the microcomputer 17. In the microcomputer 17, which will be described later, the current and voltage input in real time and the overcurrent limit value and the overvoltage limit value previously inputted in the self are mutually correlated. In comparison, if it is determined that the overcurrent or overvoltage state, it may be notified or displayed through the alarm unit 18 and the comprehensive status display unit 19.

On the other hand, the condenser data storage unit 15 has a guaranteed lifetime (Lo), maximum operating temperature (To), and self ripple for the life at the highest operating temperature for the high and low voltage electrolytic capacitors (3) and (5). It stores various data such as heat generation temperature (ΔT) and temperature difference correction coefficient (K) at the center of the condenser element due to the current, and performs the function of providing it when the microcomputer 17 requests it.

In addition, the capacitor driving time counting unit 16 updates the driving time of the high and low voltage electrolytic capacitors 3 and 5 in real time every time the power supply device to which the present invention is applied is operated. 17) perform the function provided.

In this case, the driving time coefficient values of the high voltage unit and the low pressure unit electrolytic capacitors 3 and 5 counted by the capacitor driving time unit 16 may be determined by reference to the electrolytic capacitors of the high voltage unit and the low pressure unit of the microcomputer 17 which will be described later. After calculating the life expectancy, the calculated life expectancy is subtracted from the calculated driving time coefficient value and used to accurately determine the final steady state, check readiness and fault condition.

In addition, the microcomputer 17 is the ambient temperature detection sensor 6 and the high-pressure unit and the low-pressure unit condenser temperature detection sensor (7) (8), the high-pressure unit when the power supply of the dental X-ray imaging apparatus to which the present invention is applied And a power supply input after being detected in real time from the low voltage part ripple current detector 9 and 10, the high voltage part and the low voltage part overcurrent detector 11 and 12, and the high voltage part and the low voltage part overvoltage detector 13 and 14, respectively. The ambient temperature of the device and the actual temperature, ripple current, overcurrent and overvoltage status information of the electrolytic capacitors of the high voltage section and the low voltage section are inputted, and the respective statuses are broken through the control program.

As such, when it is determined by the microcomputer 17 that it is determined that an overcurrent flows or an overvoltage is being applied in the high voltage unit or the low pressure unit, the high voltage unit is notified through the notification unit 18 or the comprehensive state display unit 19 to be described later. Or it displays at the same time with the notification that the overcurrent is flowing in the low voltage section or the overvoltage is applied.

In addition, the microcomputer 17 calculates an estimated life of each electrolytic capacitor according to the heat generation temperature of the current electrolytic capacitors by using the life expectancy calculation formula for the electrolytic capacitors stored therein, and displays them on the integrated state display unit 19. When the life of a specific electrolytic capacitor reaches the end, the notification unit 18 will notify it.

로 이루어진 것 계산식을 통해 고압부 및 저압부의 전해 콘덴서에 대한 기대수명을 실시간으로 산출하게 된다.At this time, in the microcomputer 17

It is to calculate the expected life for the electrolytic capacitors of the high pressure and low pressure part through a calculation formula consisting of in real time.

Here, Lx (hours) represents the estimated life of each electrolytic capacitor according to the heat generation temperature of the current electrolytic capacitors, and Lo (hours) represents data previously input to the capacitor data storage unit 15 (for example, Φ 10 or more). 10,000 hours), which represents a guaranteed life for the maximum use temperature, and To (° C) represents the maximum use temperature as data (for example, 105 ° C) previously input to the condenser data storage 15. Tx (° C.) represents the actual temperature of the electrolytic capacitor, and ΔT (° C.) is an exothermic temperature at the center of the capacitor element due to its own ripple current, and ΔT = K (surface temperature (Ts) − ambient temperature (T) Calculate

In this case, K is a temperature difference correction coefficient, for example, as described in the table below will have different values depending on the diameter of the electrolytic capacitor.

Hereinafter, an example of calculating the life expectancy of the electrolytic capacitors in comparison with the ambient temperature and the actual temperature of the electrolytic capacitor is shown in the following table.

For example, assuming that the actual temperature (Tx) of the electrolytic capacitors is 105 ℃, when the life expectancy for the corresponding electrolytic capacitor is calculated with 1.20 as the temperature difference correction coefficient (K) it can be seen that the time is 10,000 hours.

As another example, assuming that the actual temperature (Tx) of the electrolytic capacitors is 80 ℃, when the life expectancy for the corresponding electrolytic capacitor is calculated with 1.20 as the temperature difference correction coefficient (K), it can be seen that 56,569 hours.

As another example, it can be seen that the life expectancy of the electrolytic capacitor is 113,137 hours under the assumption that the actual temperature (Tx) of the electrolytic capacitors is 70 ° C. and 1.20 is applied as the temperature difference correction coefficient (K).

As another example, assuming that the actual temperature (Tx) of the electrolytic capacitors is 60 ℃, when the life expectancy for the corresponding electrolytic capacitor is calculated with 1.20 as the temperature difference correction coefficient (K), it can be seen that it is 226,274 hours.

As another example, assuming that the actual temperature (Tx) of the electrolytic capacitors is 50 ℃, when applying the 1.20 as the temperature difference correction coefficient (K), it can be seen that the life expectancy for the corresponding electrolytic capacitor is 452,548 hours.

As a final example, assuming that the actual temperature (Tx) of the electrolytic capacitors is 120 ℃, when the life expectancy for the corresponding electrolytic capacitor is calculated with 1.20 as the temperature difference correction coefficient (K), it can be seen that it is 3,536 hours.

As can be seen from the above examples, the actual service life (Tx) of the electrolytic capacitors is lower than the maximum operating temperature (To; 105 DEG C) of the corresponding electrolytic capacitor having a predetermined value, and the lifespan at the maximum operating temperature of the corresponding electrolytic capacitor is assured. It can be seen that the life expectancy is significantly longer than (Lo; for example, Φ10 or more than 10,000 hours). On the contrary, as the actual temperature (Tx) of the electrolytic capacitors is higher than the maximum operating temperature (To) of the electrolytic capacitor, the life expectancy is rapidly increased. It can be seen that the shortening.

Therefore, when designing or managing a power supply for driving an X-ray imaging apparatus, it is possible to prevent the temperature of the electrolytic capacitors provided in the high pressure part or the low pressure part, respectively, from being higher than a predetermined maximum use temperature (for example, 105 ° C.). It can be seen that it is desirable to design or manage such that it is possible.

On the other hand, the notification unit 18 is composed of a buzzer, a speaker, and the like, in response to the output signal of the microcomputer 17, a different warning sound (for example, intermittent sound of different coefficients, etc.) or voice over-current of the high-pressure unit or low-pressure unit In addition, it notifies the state of overvoltage, and when one of the electrolytic capacitors installed in the low voltage section or the high voltage section has reached the end of its life, different warning sounds (e.g. intermittent sounds with different coefficients) indicate that the electrolytic capacitor has reached the end of its life. Or it performs a function that tells the voice exactly.

In addition, the integrated state display unit 19 displays the overcurrent or overvoltage state of the high voltage unit or the low pressure unit in different forms in response to the output signal of the microcomputer 17, as well as on each of the electrolytic capacitors installed in the low voltage unit or the high voltage unit. It displays the expected life expectancy (estimated life) in real time and also accurately displays the life expectancy of a specific electrolytic capacitor.

In this case, the integrated state display unit 19 is composed of a plurality of color light emitting diodes and segments for displaying the life expectancy, and the display unit for the overcurrent and the overvoltage is composed of two different color light emitting diodes, respectively, to separate the high voltage part and the low pressure part. Different colors can be displayed for normal and abnormal.

In addition, the state display unit of the electrolytic capacitor for the high voltage section and the low voltage section is composed of three different color light emitting diodes, respectively, and at the same time, it is composed of two life-span display segments. It can be displayed in different colors by dividing the normal state, the check ready state and the fault state, and the life expectancy for the corresponding electrolytic capacitor calculated by the microcomputer 17 is accurately indicated by the number (ie, time). can do.

On the other hand, in the present invention, between the output of the high-voltage unit condenser temperature detection sensor 7 and the high-voltage unit ripple current detector 9, the high-voltage unit overcurrent detector 11 and the high-voltage unit overvoltage detector 13 and the input of the microcomputer 17 The state performing the insulation function was further installed with an isolated signal transmission unit (20).

Therefore, the electrical insulation (that is, interference that interferes with driving of the low pressure part due to harmonics generated in the high pressure part) may occur between the high voltage part and the low pressure part provided in the dental X-ray imaging apparatus driving power supply. The high voltage part condenser temperature detection sensor 7, the high voltage part ripple current detector 9, the high voltage part overcurrent detector 11, and the high voltage part overvoltage detector 13 are detected by the signal transmission unit 20. The signal can be accurately transmitted to the microcomputer 17 driven by the low pressure.

In addition, in the present invention, a wired / wireless communication module 21 for wired / wireless communication with the user mobile terminal 40 or the computer 50 provided in the management room of a remote place is further installed in the communication output of the microcomputer 17. However, the wired and wireless communication module 21 of the wired communication module RS232 was installed, the wireless communication module was installed Bluetooth.

Therefore, through the remote or near-field communication, the administrator of the remote site carrying the mobile terminal and the monitor in the management room, etc., to the administrators in real time to accurately identify the status of the power supply devices provided in the dental X-ray radiators, and in case of abnormal condition The necessary action can be taken immediately.

In addition, in the present invention, by further installing a wireless router 22 between the wired and wireless communication module 21 and the remote server 60, the wireless communication connected to the wired and wireless communication module 21 in the microcomputer 17. Through the router 22, various status information in each power supply device can be stored in real time (database) by transmitting to a remote server 60 in real time, so that administrators can be connected to the server 60 regardless of place. Status information on power supplies provided in a plurality of dental X-ray radiators, which are loads 30 installed in a specific dentist, may be checked.

Therefore, it is possible to greatly increase the reliability of maintenance and utilization of each dental X-ray imagers in the dental X-ray imagers, as well as to significantly improve the reliability of the product itself and the quality of the product.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

1: filter and surge protection circuit 2: PFC converter
3: high voltage electrolytic capacitor 4: DC-DC converter
5: low pressure electrolytic capacitor 6: ambient temperature sensor
7, 8: high and low pressure condenser temperature detection sensor
9, 10: high and low voltage ripple current detector
11, 12: high voltage section and low voltage section overcurrent detection section
13, 14: high voltage section and low voltage section overvoltage detection section
15: condenser data storage section 16: condenser drive time counting section
17: micom 18: notification unit
19: integrated state display unit 20: isolated signal transmission unit
21: wired and wireless communication module 22: wireless router
30: load (X-ray imaging machine) 40: portable terminal
50: computer 60: server

Claims (7)

A filter and surge protection circuit for removing a surge voltage including various noise signals included in an AC input voltage of AC 90V to 240V; A power factor corrector (PFC) converter for boosting and rectifying the AC voltage inputted through the filter and the surge protection circuit to a non-isolated DC voltage, and providing the driving voltage to a dental X-ray imager as a load; A high voltage part electrolytic capacitor having a form provided in parallel to an output part of the PFC converter and compensating and improving the power factor of the high voltage part; A DC-DC converter which converts and rectifies the DC voltage which is relatively low compared to the non-isolated DC voltage output from the PFC converter, and provides the driving voltage to the dental X-ray imager as a load; In the dental x-ray imager driving power supply comprising a low-pressure electrolytic capacitor having a form installed in parallel to the output of the DC-DC converter, and compensates and improves the power factor of the low-pressure portion,
An ambient temperature sensor for detecting the ambient temperature T of the power supply in real time;
A high pressure unit and a low pressure unit condenser temperature detection sensor for detecting a temperature Tx of the high pressure unit and the low pressure unit electrolytic capacitor in real time, respectively;
A high voltage part and a low voltage part ripple current detector for detecting ripples included in current flowing through the high voltage part and the low voltage part electrolytic capacitor;
A high-voltage unit and a low-voltage unit over-current detection unit for detecting a current flowing in the load in real time and transferring it to the microcomputer when a current exceeding a predetermined over-current limit value flows to the load;
A high voltage unit and a low voltage unit overvoltage detection unit which detects a voltage applied to a load in real time and delivers it to a microcomputer when a voltage greater than a predetermined overvoltage limit value is applied to the load;
Guaranteed life (Lo), maximum operating temperature (To), and exothermic temperature (ΔT) of the capacitor element due to its own ripple current and temperature difference correction coefficient A condenser data storage unit for storing data for (K) and providing it when a request of the microcomputer is required;
A condenser driving time counting unit for counting driving times of the high and low voltage electrolytic capacitors in real time;
When the power supply is in operation, the ambient temperature of the power supply unit is measured from the ambient temperature detection sensor, the high pressure unit and the low pressure unit condenser temperature detection sensor, the high pressure unit and the low pressure unit ripple current detector, the high pressure unit and the low pressure unit overcurrent detector, the high voltage unit and the low voltage unit overvoltage detector. As a result of receiving real-time temperature, ripple current, overcurrent and overvoltage status information of the electrolytic capacitor in the high voltage section and the low pressure section, if an over current or over voltage is detected in the high voltage section or the low voltage section, the high voltage section or the low voltage section is displayed through the alarm section or the comprehensive status display section. At the same time, it indicates that an overcurrent is flowing or an overvoltage is applied and displays the life expectancy of each electrolytic capacitor according to the exothermic temperature of the current electrolytic capacitors by using the life expectancy calculation formula for the electrolytic capacitor stored in itself. Display on the comprehensive status display, A microcomputer that notifies the user when the life of a specific electrolytic capacitor reaches the notification unit;
In response to the output signal of the microcomputer, a warning signal or a voice may be used to notify the overcurrent or overvoltage state of the high voltage section or the low voltage section, and if any one of the electrolytic capacitors installed in the low voltage section or the high voltage section has reached the end of its life, Notification unit for notifying that the end of life;
In response to the output signal of the microcomputer, the overcurrent or overvoltage state of the high voltage unit or the low pressure unit is displayed in different forms, and the expected life (estimated life) of each electrolytic capacitor installed in the low pressure unit or the high voltage unit is displayed in real time. The dental X-ray imaging apparatus driving power supply having a comprehensive state detection, display and notification function further comprising a; comprehensive status display unit for displaying the end of the life of a specific electrolytic capacitor.
The method according to claim 1,
The life expectancy calculation formula for the electrolytic capacitors performed by the microcomputer,

Dental X-ray imaging apparatus driving power supply having a comprehensive state detection and display and notification function, characterized in that consisting of.
Here, Lx (hours) is the estimated life of each electrolytic capacitor according to the heating temperature of the current electrolytic capacitors,
Lo (hours) is the life expectancy at the maximum operating temperature
To (° C.) is the maximum use temperature,
The Tx (° C.) is the actual temperature of the electrolytic capacitor,
[Delta] T ([deg.] C) is a heat generation temperature at the center of the capacitor element due to its own ripple current, and [Delta] T = K (surface temperature Ts-ambient temperature T).
The method according to claim 1,
The high voltage part condenser temperature detection sensor and the high voltage part ripple current detector, the high voltage part overcurrent detector and the output part of the high voltage part overvoltage detector and the input of the microcomputer block the electrical interference that may occur between the high voltage part and the low voltage part and simultaneously detect the high voltage part condenser temperature. The sensor and the high voltage unit ripple current detection unit, the high voltage unit overcurrent detection unit and the high voltage unit overvoltage detection unit, respectively, insulated signal transmission unit that electrically insulates in order to deliver correctly to the microcomputer driven by low voltage Power supply for driving dental x-ray cameras with status detection, indication and notification.
The method according to claim 1,
The microcommunication output unit of the microcomputer further includes a wired / wireless communication module for wired and wireless communication with a computer provided in a user's portable terminal or a remote control room. Power supply for driving X-ray cameras.
The method according to claim 4,
RS-232 is installed as a wired communication module among the wired and wireless communication modules, and a Bluetooth is installed as the wireless communication module. .
The method according to claim 1,
The comprehensive state display unit,
Consists of a plurality of color light emitting diodes and segments for life expectancy, and the overcurrent and overvoltage are divided into high voltage part and low voltage part and normal and abnormal and displayed in different colors. And a power supply for driving a dental X-ray imaging apparatus having a comprehensive state detection, display, and notification function, characterized in that it is possible to display a different life as well as to display a life expectancy by a number by dividing it into faults.
The method according to claim 4,
A wireless router (AP) is further installed between the wired / wireless communication module and a remote server, and the microcomputer allows the microcomputer to provide various status information in each power supply device in real time through a wireless router (AP) connected to the wired / wireless communication module. It is possible to transmit and memorize to a remote server by remote control, so that the managers can be stored in a specific dental office through the server, regardless of the location of the power supplies provided in each of the plurality of dental X-ray imagers A power supply for driving a dental x-ray camera having a comprehensive status detection, display and notification function characterized in that the information can be confirmed.

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