JP2004022308A - Power supply device for x-ray apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device for an X-ray apparatus capable of activating an X-ray apparatus or the like with a 100V, 15A household power supply and/or a power supply supplied from a small generator, especially suitable in case of use of the X-ray apparatus mounted on a mobile examination car. <P>SOLUTION: The device is provided with a charging means and a secondary battery converting and storing an alternate-current power supply supplied from a household power supply and/or a generator into a direct-current power supply, and a booster circuit part supplying the X-ray apparatus with the direct-current power supply supplied from the secondary battery after converting it into an alternate-current power supply and boosting it to a momentary peak voltage necessary for irradiation of the X-ray apparatus. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a power supply device for an X-ray device that supplies power to an X-ray CT device or a dental X-ray device, particularly, power supplied from a home power supply and / or a generator, etc., smoothed to a normal voltage and stored. The present invention relates to a power supply device for an X-ray device capable of instantaneously supplying the stored power to a peak voltage required for driving the X-ray device.
[0002]
[Prior art]
Conventional medical X-ray CT devices and dental X-ray devices are designed to be installed and used indoors, and, furthermore, taking a dental X-ray device as an example, an X-ray tube Since high-load power of about 20 A (2 KVA) is instantaneously consumed when irradiating X-rays, a general household power supply that supplies 100 V and 15 A power cannot be used. For this reason, a high-load high-voltage business AC power supply of 100 V and 20 A has been used.
In addition, a medical X-ray CT apparatus or a dental X-ray apparatus may be mounted on a large vehicle such as a bus to perform medical treatment or X-ray photography in a destination vehicle. X-ray CT apparatuses and dental X-ray apparatuses used indoors have been used as they are.
In a power supply device used in a conventional medical X-ray CT device or dental X-ray device, when a high-voltage commercial AC power supply is directly supplied to the X-ray device, a single-phase X-ray device is used. Since the tube voltage waveform applied to the X-ray tube is sinusoidal, there are many ripples, and there is a problem that a tube voltage region above a certain level contributing to image information for medical diagnosis is narrow. The AC power was once converted into a DC power, and then converted again into an AC power and supplied to the X-ray tube.
[0003]
[Problems to be solved by the invention]
However, the cost of using high-priced power by stably supplying a large-capacity high-voltage commercial AC power supply of about 20 A in order to cope with an instantaneous high load cannot be ignored. Since there is no outlet to receive the AC power supply, electrical work and facilities for this purpose are separately required in such a place.
In particular, the use of medical X-ray CT equipment and dental X-ray equipment is not limited to being installed in rooms such as hospitals and clinics, but may also be used in mobile examination vehicles. Commercially available high-voltage power supplies are also used for compatible X-ray devices and models. For this reason, when there was no AC power outlet for high-voltage business near the place to be examined, a dedicated generator mounted on the vehicle was operated to obtain the power, but this type of generator was The large-capacity power supply described above requires a large-sized power supply, which increases the equipment cost of the generator, increases the size of the vehicle by securing a generator installation location, and reduces the operating noise of the generator. Caused the deterioration of the indoor environment.
[0004]
Against this background, the present inventor has started to develop a power supply device for an X-ray device that solves the above-described problems, particularly a power supply device suitable for an X-ray device mounted on a mobile examination vehicle. As a result of enthusiastic studies, the inventors have finally invented a power supply device for an X-ray apparatus that solves these problems.
[0005]
The present invention, which has been completed through such circumstances, can operate an X-ray apparatus with a household power supply of 100 V and 15 A, and can also operate with a power supply output from a small generator if necessary. In particular, it is an object of the present invention to provide a power supply device for an X-ray apparatus which is suitable for being mounted on a mobile examination vehicle together with the X-ray apparatus.
[0006]
[Means for Solving the Problems]
The invention according to claim 1, which is proposed to solve the above-described problem, controls the input / output of an AC power supplied from a household power supply and / or a generator, and a control circuit for controlling the input / output of the power supply. Alternatively, a charging smoothing circuit for smoothing an AC power supplied from a control circuit, an AC / DC conversion circuit for converting the smoothed AC power to a DC power, and conversion by the AC / DC conversion circuit Charging means and a secondary battery for storing the obtained DC power, a DC / AC conversion circuit for converting the DC power supplied from the secondary battery to an AC power, and an AC power supplied from the DC / AC conversion circuit The load is smoothed by cutting the peak voltage of the X-ray device, and when the X-ray irradiation switch is input, the smoothed AC power supply is instantaneously boosted to the instantaneous peak voltage necessary for the irradiation of the X-ray device. Supply to It is a power supply device for an X-ray apparatus according to claim that a pressure circuit portion.
[0007]
In this power supply device for an X-ray apparatus, a household AC power supply of 100 V and 15 A for home use is smoothed, temporarily converted to a DC power supply, and stored in a secondary battery. This smoothing is performed for charging, and thus, a stabilized power supply can be charged. Then, the stored DC power supply is converted into an AC voltage again, and the converted AC power supply is smoothed. This smoothing is performed to cut the peak value of the voltage waveform. In this case, the booster circuit unit raises the AC power to the high voltage necessary for the irradiation of the X-ray apparatus at the time of the irradiation of the X-ray apparatus, and instantaneously. Can supply. The flow of the current toward the booster circuit section is made possible by turning on the irradiation switch of the X-ray apparatus.
When the power supply device for the X-ray apparatus is configured in this manner, a household power supply can be used. As a result, compared to the conventional case where an AC power supply for high-voltage business is used, power in the price band of the basic charge can be used, and the power use cost can be greatly reduced. Further, the use of the X-ray apparatus in many places where the use is restricted because there is no outlet of the AC power supply for high-voltage business becomes possible.
Although not necessarily limited, it is desirable to use a UPS and an inverter, or a load conditioner configured by adding a secondary battery and a control circuit unit to these units, for the DC / AC conversion circuit unit. It is desirable to use a UPS and an inverter also for the AC / DC conversion circuit.
[0008]
According to a second aspect of the present invention, in the power supply device for an X-ray apparatus according to the first aspect, the power supply apparatus is used by being mounted on an examination car together with an X-ray CT apparatus or a dental X-ray apparatus. The circuit unit is connected to a secondary battery for power supply stabilization by temporarily converting AC power supplied to the control circuit unit to DC, and is connected to the control circuit unit or the AC / DC conversion circuit unit and an X-ray device. This is a power supply device for an X-ray apparatus in which a UPS is connected to a personal computer that performs digital image processing and digital image display of an image, various electric devices for lighting and air conditioning in a vehicle, or an outlet in the vehicle.
[0009]
As described above, when the supplied AC power is converted into DC and stored in the power stabilizing secondary battery, stabilized power can be supplied not only from the X-ray apparatus but also from the power supply to these electric devices. For this reason, the power supply device for the X-ray device is mounted on the vehicle together with the X-ray CT device or the dental X-ray device, and the engine of the inspection vehicle is operated in an idling mode when performing the mobile inspection and the mobile inspection by the mobile inspection vehicle. This eliminates the need to obtain a power source, thereby ensuring a comfortable in-vehicle environment free of engine noise and vibration.
The effect on the electrical equipment such as personal computers due to the voltage drop of the electromotive force and the backflow of the noise caused by the load at the time of irradiation of the X-ray equipment should be prevented by connecting the UPS between the control circuit unit and each of these electrical equipment. Can be. In addition to these electric devices, the control circuit unit and the wheelchair support device are also used when a wheelchair support device is installed in a medical examination car for freely tilting the wheelchair to a position that facilitates X-ray photography while a person is in the wheelchair. UPS is connected to the control device of the control motor. As the wheelchair support device, a wheelchair support device which has been applied for a patent by the present applicant and published (Japanese Patent Application Laid-Open No. 2001-01390) corresponds to the present invention.
[0010]
According to a third aspect of the present invention, in the configuration according to the first or second aspect, the control circuit unit is provided with a connection terminal that receives supply of electricity from a solar cell and / or a fuel cell. Power supply.
[0011]
The power supply device for an X-ray device according to claim 1 or 2 receives a supply of AC power from a household AC power supply and / or a generator from a drive power supply. As described above, when power can be supplied from a solar cell and / or a fuel cell as well, for example, when an X-ray apparatus is used in a place where a household power outlet is not nearby, a generator is assisted. it can. Fuel cells can also be used as the main power source.
[0012]
According to a fourth aspect of the present invention, in the power supply device for an X-ray apparatus according to any one of the first to third aspects, the power supply unit further includes a charge amount detection unit for detecting a charge amount of the secondary battery. If the secondary battery has not reached the required amount of charge (charging rate) for X-ray irradiation and is in the charging state, the irradiation switch of the X-ray tube is interlocked at the OFF position, and the secondary battery is irradiated with X-rays. When the required charge amount (charging rate) has been reached, a switch circuit for releasing the interlock of the irradiation switch includes a power supply for the X-ray device connected between the charge amount detection means and the irradiation switch. Device.
[0013]
In this case, when the rechargeable battery has not reached the predetermined charge level, the irradiation switch of the X-ray apparatus cannot be turned on, so that X-ray imaging is performed without reaching the voltage required for the X-ray apparatus. Absent. A red lamp and a blue lamp respectively light up and indicate that the secondary battery is charging and has not reached the charge amount required for X-ray irradiation, and that the secondary battery has reached the charge amount required for X-ray irradiation. Providing a lamp is convenient because it is possible to determine at a glance whether or not the X-ray irradiation switch can be operated, and X-rays are not irradiated while the charge amount is insufficient. Further, instead of these red and blue lamps, a lamp for lighting and displaying the charge amount in a stepwise manner may be provided, and a function of notifying that the charging is completed by a buzzer may be added.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
A specific embodiment of a power supply device for an X-ray device according to the present invention will be described in detail with reference to the accompanying drawings. In the following, a power supply device mounted on a medical examination car together with a dental X-ray device will be described.
[0015]
FIG. 1 is a schematic block diagram showing a power supply device for an X-ray device according to an embodiment of the present invention. The power supply device for an X-ray device according to the embodiment of the present invention shown in FIG. The power supply device 1 of the embodiment) is fixedly mounted on a medical examination car together with an X-ray device for operating a dental X-ray device, and is used at the time of use. Power is obtained from the generator 2. A 100V household power supply is obtained by connecting the plug 5 at the tip of the extension cord 4 extending from the control circuit unit 3 of the power supply device 1 of the present embodiment to an outlet provided in a building near the examination car. As the small generator 2, a commercially available small generator that outputs an AC power of 100 V and 15 KVA using an engine as a power source is used, and the small generator 2 is fixedly mounted under the floor of the examination vehicle or in the vicinity thereof. . Which power supply to use is determined by selecting manual operation of the changeover switches SW3 and SW4. Further, the control circuit unit 3 is provided with power input terminals P1 and P2 and input switches SW1 and SW2 that can take in auxiliary power from the solar cell B1 or the fuel cell B2.
[0016]
In the power supply device 1 of the present embodiment, the control circuit unit 3 includes an AC / DC conversion circuit unit (no number) for converting an AC power supply to a DC power supply, a charger, and a stabilized power supply for storing the DC-converted power supply. UPS (uninterruptible power supply) (unnumbered) equipped with a DC / AC conversion circuit unit (unnumbered) that converts the DC power in the secondary battery (no number) and the DC power supply in the secondary battery for power supply into the AC power It is configured. This DC / AC conversion circuit section (no number) is connected to a smoothing circuit section 6 for smoothing an AC power supply via an electric signal line.
The smoothing circuit unit 6 includes an AC / DC conversion circuit unit for converting an AC power supply to a DC power supply again via an electric signal line, and a charger as a charging unit. The DC terminal is connected to the side terminal, and the DC current is stored in the secondary battery 8 by this charger. The DC power supply current stored in the secondary battery 8 flows through the output terminal of the UPS 7 to the DC / AC conversion circuit 9 for converting DC power to AC power, and is further connected to the DC / AC conversion circuit 9. The AC power supplied to the X-ray device 10 is boosted to the instantaneous peak voltage required for irradiation by the X-ray device 10 and supplied to the X-ray device 10 from a booster circuit unit 11 configured by an inverter.
[0017]
The control circuit unit 3 includes a personal computer 13 for digitally displaying an image captured by the X-ray apparatus 10, a lighting device 14 in the examination car room, an air conditioner 15 in the examination car room, and an X-ray while a person is in a wheelchair. It has a wheelchair support device 16 for freely tilting the wheelchair in a posture easy to take a picture, and input terminals of UPSs 18, 19, 20, 21, and 22 corresponding to an outlet 17 attached to the interior of the diagnostic car. , 19, 20, 21, and 22 are connected by electric signal lines. In this way, the output terminals of the UPSs 18, 19, 20, 21, and 22, and the corresponding electric devices 13 to 16 and the outlet 17 can be connected by the electric signal lines.
When the UPSs 7 and 18 to 22 corresponding to various electric devices are provided in this manner, the UPSs 7 and 18 to 22 directed to the various electric devices 13 to 16 and the outlet 17 which are generated when a high-voltage power supply is instantaneously applied to the X-ray tube of the X-ray apparatus 10 are provided. The effect of the voltage drop and the backflow of noise can be prevented.
[0018]
The X-ray irradiation by the X-ray device 10 is performed by instantaneously applying a high-voltage power supply to the X-ray tube with the irradiation switch 23, and the charge amount detecting means connected to the irradiation switch 23 and the secondary battery 8. The charge amount detector 24 is connected by an electric signal line, and a switch circuit unit 25 that performs interlock control of the irradiation switch 23 by relay control or microcomputer control is connected to the electric signal line. Therefore, when the secondary battery 8 has not reached the predetermined amount (rate) of the charged amount (charging rate), even if the irradiation switch 23 is pressed, it does not turn on.
[0019]
FIG. 2 shows an operation panel 30 of the X-ray apparatus 10. As shown in FIG. 2, a predetermined amount (rate) of the secondary battery 8 is provided on a surface near the irradiation switch 23 provided on the operation panel 30. When the charging amount (charging rate) has been reached and the illumination lamp 23 can be turned on, the blue lamp 31 illuminates and indicates that the secondary battery 8 has reached a predetermined charging amount (charging rate). There is provided a red lamp 32 for lighting and displaying the state of charging. These lamps 31 and 32 are connected to the switch circuit unit 25 shown in FIG. 1, and a dentist or an assistant operating the X-ray apparatus determines which of the blue lamp 31 and the red lamp 32 is on. It is possible to see whether or not X-ray irradiation is possible. Reference numeral 24 denotes a switch for stopping X-ray imaging.
[0020]
FIG. 3 is a flowchart showing a charging operation performed by the power supply device for the X-ray apparatus according to the present embodiment. As shown in this flowchart, when DC power flows toward the secondary battery (step 100), the charging operation becomes stable. Charging is performed on the secondary battery for a generalized power supply (step 101). Then, the charge amount detection means detects the charge amount of the stabilized power supply secondary battery (step 102). When it is detected that the charge amount has not reached the predetermined amount, the charge is continued. When the fixed amount of charge is detected, the next X-ray irradiation secondary battery is charged (step 103). When the detection of the charged amount of the secondary battery (Step 104) by the charged amount detecting means has detected that the charged amount has not reached the predetermined charged amount, the charging is continued, and when the charged amount of the predetermined amount is detected. The DC power stored in the secondary battery is load-smoothed by peak cutting, and the DC power is boosted by the booster circuit section by turning on the X-ray irradiation switch and directed to the X-ray tube. Instantaneously, it becomes a high-voltage AC power supply, flows into the X-ray tube, and is irradiated with X-rays from the X-ray tube (step 105). After the X-ray is irradiated from the X-ray tube, charging is performed again on the secondary battery for X-ray irradiation (Step 103), and thereafter, each step of X-ray irradiation and charging is repeated. Then, when the switch for terminating the X-ray imaging is pressed, the supply of the high-voltage power is stopped and the imaging is stopped (step 106), whereby the power supply to the X-ray apparatus is terminated (stopped) (step 107). .
[0021]
FIG. 4 is a graph showing the power demand by the X-ray apparatus and various electric devices in terms of the power amount and time. As shown in this figure, the power amount protrudes at the time of X-ray irradiation and control of the wheelchair support device. When the power supply device of the present embodiment is used, a power rate in a low-price band in which the peak value is peak-cut to the level L in which the load is smoothed can be used. Then, at the time of X-ray irradiation or control of the wheelchair support device, the power stored in the secondary battery can be boosted and supplied to a voltage required for X-ray irradiation and control of the wheelchair support device.
[0022]
【The invention's effect】
According to the power supply apparatus for an X-ray apparatus according to the present invention described above, the X-ray apparatus can be operated using a household AC power supply of 100 V and 15 A and / or a small generator. The use of the X-ray apparatus has become possible in many places where the use was restricted due to the lack of a commercial AC power outlet. Moreover, according to the power supply device of the X-ray apparatus according to the present invention, when the home AC power supply and / or the power supply supplied from the small generator is temporarily stored in the secondary battery and the X-ray is irradiated, The power supply voltage waveform was smoothed by peak cutting to further reduce the load to a high voltage load required for X-ray irradiation, so that it could be instantaneously supplied to the X-ray apparatus. As a result, even if a conventional power source for high-load bandwidth is not required, a household power source with a low power usage fee can be used, and the power usage cost can be greatly reduced. . Also, power can be supplied from a small generator that can be easily mounted on a vehicle.
[0023]
Therefore, according to the power supply device of the X-ray apparatus according to the present invention, it can be mounted on a vehicle together with the X-ray apparatus to cope with a mobile examination and a mobile examination by a mobile examination vehicle. It can supply power to various electric devices such as a personal computer, a vehicle interior lighting, a vehicle interior air conditioner, a vehicle interior outlet, a wheelchair support device, etc., which perform digital image processing and digital image display of the irradiation by the X-ray device. It is now possible to prevent the effect of the voltage drop of the electromotive force due to the load at the time of irradiation and the adverse effect due to the backflow of noise.
[0024]
Also, when operating the air conditioner in the room of the medical examination car by X-ray irradiation of the X-ray device, it is possible to operate by taking in power from this power supply device, instead of performing idling driving of the engine. As a result, a comfortable in-vehicle environment free of engine noise and vibration can be secured.
[0025]
In addition, when the secondary battery is being charged, the irradiation switch of the X-ray apparatus is interlocked so that the irradiation switch cannot be turned on, so that the X-ray apparatus is not operated. As a result, the irradiation switch of the X-ray apparatus is pressed. At a glance, and it is possible to prevent a situation in which an X-ray is irradiated while the X-tube voltage is low and an unclear image is output.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing a power supply device for an X-ray device according to one embodiment of the present invention.
FIG. 2 is a diagram showing an operation panel of the X-ray apparatus.
FIG. 3 is a flowchart showing a charging operation by a power supply device for an X-ray device according to the present embodiment.
FIG. 4 is a graph showing the power demand by the X-ray apparatus and various electric devices in terms of the amount of power and time.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power supply device for X-ray equipment 2 Small generator 3 Control circuit unit 3 UPS
6 Smoothing circuit unit 7 UPS
Reference Signs List 8 secondary battery 9 DC / AC conversion circuit unit 10 X-ray device 11 booster circuit unit 13 personal computer 14 lighting device 15 air conditioner 16 wheelchair support device 17 outlet 18, 19, 20, 21, 22 UPS

Claims (4)

A control circuit for controlling the input and output of AC power supplied from a household power supply and / or a generator,
A charging smoothing circuit for smoothing AC power supplied to or supplied from the control circuit,
An AC / DC conversion circuit unit for converting the smoothed AC power supply to a DC power supply;
Charging means for storing DC power converted by the AC / DC conversion circuit, and a secondary battery;
A DC / AC conversion circuit unit for converting DC power supplied from the secondary battery into AC power,
The load is smoothed by peak-cutting the peak voltage of the AC power supply supplied from the DC / AC conversion circuit unit, and the smoothed AC power supply is instantaneously required for X-ray irradiation when the X-ray irradiation switch is input. A power supply device for the X-ray apparatus, comprising: a booster circuit section which boosts the voltage to an instantaneous peak voltage and supplies the voltage to the X-ray apparatus. An X-ray CT device or a dental X-ray device is used by being mounted on a medical examination car together with the X-ray device,
The control circuit unit is connected to a power supply stabilizing secondary battery by temporarily converting AC power supplied to the control circuit unit to DC,
Between the control circuit unit or the AC / DC conversion circuit unit and a personal computer that performs digital image processing and digital image display of an image captured by the X-ray apparatus, various electric devices for lighting and air conditioning in the vehicle, or an outlet in the vehicle, a UPS (Non- The power supply for an X-ray apparatus according to claim 1, wherein the power supply is connected to a power failure power supply. The power supply device for an X-ray device according to claim 1 or 2, wherein the control circuit unit includes a connection terminal that receives supply of electricity from a solar cell and / or a fuel cell. It has a charge amount detecting means for detecting a charge amount of the secondary battery,
When the secondary battery is not charged by the charge amount detecting means and has not reached the charge amount (charging rate) required for X-ray irradiation, the X-ray tube irradiation switch is interlocked at the OFF position to charge the secondary battery. When the state of charge of the next battery has reached the amount of charge (charge rate) required for X-ray irradiation, a switch circuit unit for releasing the interlock of the irradiation switch is connected between the charge amount detection means and the irradiation switch. A power supply device for an X-ray device according to any one of claims 1 to 3.

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