JP2005304696A - Mobile radiographic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To precisely measure a present residual electric energy of a battery, or a power source of a carriage transfer and a driving power supply for a radiography. <P>SOLUTION: This mobile radiographic equipment is so constituted that the power consumption of the battery 3 consumed for the carriage transfer and the radiography, which is required in calculating the residual electric energy of the battery, or for the power source for the carriage transfer and the driving power supply for the radiography, is added up by a battery power consumption calculating part 21 according to the operating current of electric equipment for the carriage transfer and the operating current of the electric equipment for the radiography. The power consumption of the battery 3 is thus measured according to the operating current of the electric equipment for the carriage transfer and the operating current of the electric equipment for the radiography, which accompany no vibration caused by the power consumption, so that the power consumption of the battery 3 becomes precise and consequently the present residual electric energy of the battery calculated by a battery residual electric energy calculation part 22 based on the power consumption of the battery 3 becomes appropriate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention drives a rechargeable battery, electric equipment for moving a dolly that operates using the battery as a power source to move the dolly, and a battery for performing X-ray imaging with X-ray irradiation by an X-ray tube The present invention relates to a mobile X-ray imaging apparatus mounted on a cart that can move X-ray imaging electrical equipment that operates as a power source, and more particularly to a technique for accurately measuring the amount of remaining battery power.

  As shown in FIG. 5, a conventional mobile X-ray imaging apparatus used in a hospital or the like has an X-ray tube 52 that irradiates a subject (not shown) with X-rays on a movable carriage 51, a battery, and the like. 53, electric equipment for moving the carriage such as an electric motor 54 that operates using the battery 53 as a power source to move the carriage 51, and a battery for performing X-ray imaging with X-ray irradiation by the X-ray tube 52 In addition to electrical equipment for X-ray imaging, such as an X-ray irradiation unit (not shown) including a high-voltage power source that operates as a drive power supply, the rear portion of the carriage 51 is loaded with an X-ray imaging storage medium such as a film. A cassette storage box 55 for storing the cassette (not shown) is also mounted.

  When performing X-ray imaging, the mobile X-ray imaging apparatus is moved to an imaging location such as a hospital room, and an unimaged cassette is taken out from the cassette storage box 55 and set on the back side of the subject. X-ray imaging is performed by irradiating the tube 52 with X-rays.

  On the other hand, in the case of a mobile X-ray imaging apparatus, the power amount of the battery 53 that is a power source for moving the carriage and a driving power source for X-ray imaging is consumed and reduced by the movement of the carriage and X-ray imaging. . On the other hand, in the mobile X-ray imaging apparatus, the remaining electric energy of the battery is monitored to prevent a situation where a power source for moving the carriage and a driving power source for X-ray imaging are insufficient. In other words, there is a correlation between the output voltage value of the battery and the remaining power amount that the output voltage value decreases as the remaining power amount decreases. The amount of electric power is measured, and the result is displayed on a display monitor (not shown) on the upper surface of the carriage 51.

  However, in the case of the conventional mobile X-ray imaging apparatus, there is a problem that the amount of remaining power of the battery cannot be accurately measured. The output voltage value of the battery fluctuates with fluctuations caused by power consumption. The degree of fluctuation of the output voltage value and the width of the fluctuation are affected by the ambient temperature, and the output voltage value once lowered returns to the original value over time in the usage state where the battery is repeatedly discharged and paused. It shows complex behavior. Therefore, in the case of the conventional method of measuring the remaining electric energy of the battery based on the output voltage value of the battery, the accuracy is poor and the remaining electric energy cannot be measured accurately.

  The present invention has been made in view of such circumstances, and is a mobile type capable of accurately measuring the remaining power amount of a battery that is a power source for moving a carriage and a driving power source for X-ray imaging. An object is to provide an X-ray imaging apparatus.

  In order to achieve such an object, the present invention has the following configuration.

  That is, the mobile X-ray imaging apparatus according to claim 1 powers a movable carriage, an X-ray tube that irradiates a subject with X-rays, a rechargeable battery, and a battery for moving the carriage. A mobile type equipped with electric equipment for moving a carriage that operates as a power source and electric equipment for X-ray imaging that operates using a battery as a driving power source in order to perform X-ray imaging with X-ray irradiation by an X-ray tube In the X-ray imaging apparatus, a battery initial power amount setting means for setting an initial power amount of the battery, and a battery generated in the electric equipment for moving the cart and the electric equipment for X-ray imaging due to the movement of the cart and X-ray imaging. A battery power consumption calculating means for calculating the power consumption, and a battery remaining power for calculating the remaining power of the battery based on the initial battery energy and the calculated battery power consumption. And it is characterized in that it comprises a power amount calculating means, and a battery remaining power amount display means for displaying the remaining power amount of the battery.

  (Operation / Effect) In the mobile X-ray imaging apparatus according to the first aspect of the invention, first, the initial power amount of the battery, which is the power source for moving the carriage and the driving power source for the X-ray imaging, is determined. Set by setting means. Then, the electric equipment for moving the carriage is operated by using the battery as a power source, and the cart is moved, or the electric equipment for X-ray imaging is operated by using the battery as a power source, and X-rays accompanied by X-ray irradiation by the X-ray tube When imaging is performed, the battery power consumption calculating means calculates the electric power consumption of the battery generated by the movement of the carriage and the X-ray imaging for the electric equipment for moving the carriage and the electric equipment for X-ray imaging, respectively. . Further, the remaining battery power calculation means calculates the remaining battery energy based on the initial battery energy set by the initial battery power setting means and the calculated battery power consumption by the battery consumption power calculation means. In addition to the calculation, the remaining battery power display means displays the calculated remaining battery power.

  According to a second aspect of the present invention, there is provided the mobile X-ray imaging apparatus according to the first aspect, further comprising charging time measuring means for measuring a charging time of the battery, wherein the battery initial power amount setting means is previously set for the battery. The initial electric energy is set according to the product of the obtained charging electric energy per unit time and the charging time measured by the charging time measuring means.

  (Operation / Effect) According to the invention of claim 2, the initial electric energy is set according to the product of the charging electric energy per unit time obtained in advance for the battery and the charging time measured by the charging time measuring means. Therefore, it is not necessary to actually measure the charging current of the battery when measuring the initial electric energy.

  According to a third aspect of the present invention, in the mobile X-ray imaging apparatus according to the second aspect, the battery initial power amount setting means exceeds a full charge time for setting the battery to a full charge state from a zero charge state. In all cases, set the saturated power amount held in the full charge state as the initial power amount, and if the charge time does not exceed the full charge time, the non-saturated power amount and the charge held with the charge current for the charge time The total amount of remaining power just before the start is cut to the amount exceeding the saturated power amount and set as the initial power amount.

  (Operation / Effect) According to the invention of claim 3, when the charging time measured by the charging time measuring means exceeds the full charging time, the saturated electric energy held in the fully charged state is set as the initial electric energy. Therefore, when the charging time exceeds the full charging time, it is possible to avoid an error that treats the invalid charging time exceeding the full charging time as the effective charging time. Also, if the charging time does not exceed the full charging time, cut the total of the non-saturated energy held by the charging current for the charging time and the remaining power just before the start of charging to the amount exceeding the saturated power. Since the initial electric energy is set (that is, the total is reduced to the saturated electric energy), if the charging time does not exceed the full charging time, the remaining electric energy just before the start of charging is appropriately transferred as the initial electric energy.

  According to a fourth aspect of the present invention, there is provided the mobile X-ray imaging apparatus according to any one of the first to third aspects, further comprising battery output voltage detecting means for detecting an output voltage value of the battery, wherein If the output voltage value detected by the battery output voltage detection means is below the threshold value at which the battery does not practically remain, the setting means sets the initial power amount to zero as the remaining power amount immediately before the start of charging. Is set.

  (Operation / Effect) According to the invention of claim 4, when the output voltage value detected by the battery output voltage detecting means is below the threshold value at which the power does not substantially remain in the battery, The initial power amount is set with the remaining power amount of zero as zero, so there is virtually no power remaining in the battery. It can be avoided that the initial electric energy is transferred.

  According to a fifth aspect of the present invention, in the mobile X-ray imaging apparatus according to any one of the first to fourth aspects, the battery power consumption calculating means is a unit operation time determined in advance for the electric equipment for moving the carriage. Product of power consumption per unit and operation time of electric equipment for moving cart, and power consumption per unit operation time and operation of electric equipment for X-ray photography determined in advance for electric equipment for X-ray photography The product of time is added together to calculate the amount of power consumed by the battery.

  (Operation / Effect) According to the invention of claim 5, the battery power consumption calculating means is configured to determine the power consumption per unit operation time determined in advance for the electric equipment for moving the cart and the operation of the electric equipment for moving the cart. The product of time and the product of the power consumption per unit operating time obtained in advance for the electrical equipment for X-ray imaging and the operating time of the electrical equipment for X-ray imaging are added to calculate the power consumption of the battery. Therefore, when measuring the power consumption of the battery, it is not necessary to actually measure the operating current of the electric equipment for moving the carriage and the operating current of the X-ray imaging electric equipment.

  According to a sixth aspect of the present invention, in the mobile X-ray imaging apparatus according to any one of the first to fifth aspects, the battery output voltage detection means for detecting the output voltage value of the battery is provided. If the output voltage value detected by the means is below the threshold value at which no power substantially remains in the battery, the battery remaining power calculation means counts the remaining power as zero and the battery remaining power display means Indicates that the remaining power is zero.

  (Operation / Effect) According to the invention of claim 6, when the output voltage value detected by the battery output voltage detecting means is below the threshold value at which the power does not substantially remain in the battery, the remaining power amount is reduced. Since the initial electric energy is recorded / displayed as zero, it is possible to avoid erroneously recording / displaying that the battery is effectively remaining even though the battery does not substantially have any remaining power.

  In the case of the mobile X-ray imaging apparatus of the present invention, the movement of the carriage and the X-ray imaging required for calculating the remaining power of the battery that is the power source for moving the carriage and the driving power source for the X-ray imaging. The battery power consumption generated by the execution is calculated by the battery power consumption calculation means. Therefore, the battery power consumption is more accurate than the battery power consumption estimated from the battery output voltage value. As a result, the remaining battery power calculated by the remaining battery power calculation means based on the battery power consumption is naturally accurate. Therefore, according to the mobile X-ray imaging apparatus of the present invention, it is possible to accurately measure the remaining power amount of the battery that is the power source for moving the carriage and the driving power source for X-ray imaging.

  An embodiment of the mobile X-ray imaging apparatus of the present invention will be described below. FIG. 1 is a perspective view showing the entire mobile X-ray imaging apparatus according to the embodiment, and FIG. 2 is a block diagram showing the configuration of the main part of the mobile X-ray imaging apparatus according to the embodiment.

  In the case of the mobile X-ray imaging apparatus of the embodiment, the movable carriage 1 is equipped with an X-ray tube 2 for irradiating the subject M on the bed B with X-rays and a rechargeable battery 3. In addition, an electric motor 4 for moving the carriage that operates using the battery 3 as a power source for moving the carriage 1 and an electric wheel brake 5 are mounted as electric equipment for moving the carriage.

  An operation panel portion P for performing operations necessary for moving the carriage and X-ray imaging is mounted on the upper surface of the carriage 1, and a cassette F loaded with an X-ray imaging storage medium such as a film on the back of the carriage 1. A cassette storage box J to be stored is mounted so that it can be opened. As shown by the one-dot chain line in FIG. 1, the cassette storage box J is tilted toward the front side to open the entrance of the cassette F, and is pushed back to close the entrance of the cassette F.

  When performing X-ray imaging, the cassette F is taken out from the cassette storage box J and set on the back side of the subject M, and X-rays are emitted from the X-ray tube 2. When the X-ray irradiation ends, the cassette F that has been imaged is returned to the cassette storage box J.

  When the electric motor 4 is rotated by the electric motor operation signal output from the movement control unit 6 in accordance with the operation of the cart performed by the operator at the operation panel P, the wheel 1A of the cart 1 is rotated and the cart 1 moves together with the X-ray tube 2. To do. When the operator performs a cart stop operation on the operation panel P, the electric motor operation signal output from the movement control unit 6 disappears, the rotation of the electric motor 4 stops, and the cart 1 stops.

  Further, the wheel brake 5 is actuated by the brake operation signal output from the brake control unit 7 in accordance with the brake operation performed by the operator on the operation panel P, and the wheel 1A of the carriage 1 is braked. Migrate to When the operator performs a brake release operation on the operation panel P, the brake operation signal output from the brake control unit 7 disappears, the wheel brake 5 applied to the wheel 1A of the carriage 1 is released, and the carriage 1 moves. Return to possible state.

  Further, the carriage 1 includes an X-ray irradiation unit 9 mainly composed of a high-voltage power supply 8 that generates a high voltage to be applied to the X-ray tube 2, and a collimator lamp 10 indicating an X-ray irradiation area of the subject M. And an electric lock release mechanism 12 (for example, constituted by an electric actuator) that releases the mechanical lock that stops the movement of the X-ray tube 2 with respect to the support member 11 that holds the X-ray tube 2. In order to perform X-ray imaging accompanied by X-ray irradiation by the X-ray tube 2, it is mounted as an electrical equipment for X-ray imaging that operates using a battery 3 as a driving power source.

  When the X-ray irradiation unit 9 is activated by an X-ray irradiation signal output from the X-ray imaging control unit 13 in accordance with an X-ray imaging operation performed by the operator on the operation panel unit P, a high voltage is supplied from the high voltage power source 8 to the X-ray tube 2. The X-ray tube 2 irradiates the subject M with X-rays. As soon as the X-ray irradiation ends, the X-ray irradiation signal disappears. That is, the X-ray irradiation unit 9 operates only while the X-ray irradiation signal is output.

  The collimator lamp 10 is arranged in the collimator of the X-ray tube 2 and is turned on (lit) and off (dark) by an electric switch 10 </ b> A arranged on the side of the X-ray tube 2. When the operator turns on the lighting switch 10A, the collimator lamp 10 is lit and the X-ray irradiation area is brightly illuminated. At the same time, a lamp lighting signal is output from the lamp lighting detection unit 14 while the collimator lamp 10 is lit. When the operator performs an extinguishing operation with the lighting switch 10A, the collimator lamp 10 is extinguished, and the lamp lighting signal output from the lamp lighting detection unit 14 is also extinguished. That is, the period during which the lamp lighting signal is output is the operation time (lighting time) of the collimator lamp 10.

  When the unlocking mechanism 12 is activated, the mechanical lock that stops the movement of the X-ray tube 2 is released by the unlocking signal output from the unlocking control unit 15 in accordance with the unlocking operation performed by the operator on the operation panel P. The When the mechanical lock on the X-ray tube 2 is released, the X-ray tube 2 is manually swung, moved forward / backward, or moved up and down. When the operator performs an unlocking stop operation on the operation panel portion P, the unlocking signal output from the unlocking control unit 15 disappears and the X-ray tube 2 is mechanically locked again. Cannot move smoothly.

  On the other hand, the apparatus of the embodiment has a battery charging function for charging the battery 3 as a power source for moving the carriage and a driving power source for X-ray imaging. As shown in FIG. 2, the charging input terminal 16 is connected to the battery 3 via the electric switch element 17, and a charge control unit 18 that turns the electric switch element 17 on and off is connected to the battery 3. . When charging the battery 3, the charging input terminal 16 is connected to an external power source (not shown), and is output from the charging control unit 18 in accordance with the charging start operation performed by the operator on the operation panel unit P. The electrical switch element 17 is turned on by the charging execution signal. When the electrical switch element 17 is turned on, a charging current from an external power source flows into the battery 3 and electric power is accumulated in the battery 3. When the operator performs a charge stop operation on the operation panel portion P, the charge execution signal output from the charge control portion 18 disappears, the electric switch element 17 is turned off, and the charge current is cut off. Therefore, the period during which the charge execution signal is output is the charging time. In principle, the battery 3 stores an amount of power proportional to the charging time.

  In addition, in the mobile X-ray imaging apparatus of the embodiment, a charging time measuring unit 19 that measures the charging time of the battery 3 and a battery initial energy setting unit 20 that sets the initial energy of the battery 3 are provided. ing.

  The charging time measuring unit 19 measures the charging time by measuring the period during which the charging execution signal is output from the charging control unit 18. The battery initial power amount setting unit 20 calculates the initial power amount W (= Wa × T) according to the charging power amount Wa per unit time obtained in advance for the battery 3 and the charging time T measured by the charging time measuring unit 19. Set. Therefore, in the case of the apparatus according to the embodiment, the initial power amount is set by the product of the charge power amount per unit time obtained in advance for the battery and the charge time measured by the charge time measuring unit 19. When measuring, it is not necessary to actually measure the charging current of the battery 3.

  Further, in the apparatus of the embodiment, the power consumption of the battery 3 generated by the movement of the carriage and the X-ray imaging is measured according to the operating current of the electric equipment for moving the carriage and the operating current of the electric equipment for X-ray imaging. A battery power consumption calculation unit 21 is provided. The battery power consumption calculation unit 21 calculates the product of the power consumption per unit operation time and the operation time of the electric equipment for moving the trolley determined in advance for the electric equipment for moving the trolley, and the electric equipment for X-ray photography. The product of the power consumption per unit operation time obtained in advance and the operation time of the electrical equipment for X-ray imaging is added to calculate the battery power consumption Q.

  In the case of the battery power consumption calculation unit 21, with respect to the electric equipment for moving the carriage, an electric motor operation signal and a brake operation signal indicating that the electric motor 4 and the wheel brake 5 are operating are sent. While the electric motor operation signal is being input, the electric power is accumulated at a rate of the electric power consumption Qa per unit operation time obtained in advance for the electric motor 4, and the electric power consumption QA by the electric motor 4 is calculated. It is done. While the brake operation signal is being input, electric power integration is performed at a rate of the electric power consumption Qb per unit operation time obtained in advance for the wheel brake 5, and the electric power consumption QB is measured.

  The battery power consumption calculation unit 21 also includes an X-ray irradiation signal indicating that the X-ray irradiation unit 9, the collimator lamp 10, and the lock release mechanism 12 are in operation, A lighting signal and a lock release signal are sent. While the X-ray irradiation signal is being input, power integration is performed at a rate of power consumption Qc per unit operation time obtained in advance for the X-ray irradiation unit 9, and power consumption by the X-ray irradiation unit 9 is performed. The quantity QC is measured. While the lamp lighting signal is being input, the power consumption QD is measured by performing power integration at a rate of the power consumption Qd per unit operation time obtained in advance for the collimator lamp 10. While the lock release signal is being input, the power consumption QE is measured by performing power integration every moment at the rate of the power consumption Qe per unit operating time obtained in advance for the unlock mechanism 12.

In addition, the battery power consumption calculation unit 21 includes a power consumption QA by the electric motor 4, a power consumption QB by the wheel brake 5, a power consumption QC by the X-ray irradiation unit 9, and a power consumption by the collimator lamp 10. The amount QD and the power consumption QE by the lock release mechanism 12 are added together to calculate the power consumption Q by the electric equipment for moving the carriage and the electric equipment for X-ray photography. That is, in the case of the battery power consumption calculation unit 21, the operating current is individually measured in advance for each of the electric motor 4, the wheel brake 5, the X-ray irradiation unit 9, the collimator lamp 10, and the lock release mechanism 12. The power consumption of the entire electrical equipment is obtained by measuring the power consumption in advance and summing the power at the ratio of the power consumption per unit operating time and measuring and adding the individual power consumption. The electric energy Q is calculated. Therefore, in the case of the apparatus of the embodiment, when measuring the power consumption of the battery 3, it is not necessary to actually measure the operating current of the electric equipment for moving the carriage and the operating current of the X-ray radio equipment. The apparatus displays a remaining battery power calculation unit 22 that calculates a remaining power R of the battery 3 based on an initial power W of the battery 3 and a consumed power Q of the battery 3, and a remaining power R of the battery 3. A display monitor 23 is provided as a means for displaying remaining battery power. That is, in the case of the battery remaining power calculation unit 22, the initial power amount W set by the battery initial power amount setting unit 20 is held, and the consumption calculated by the battery power consumption calculation unit 21 from the initial power amount W is stored. The remaining electric energy R of the battery 3 is calculated by subtracting the electric energy Q. The display monitor 23 displays the remaining power R of the battery 3 calculated by the battery remaining power calculation unit 22. The remaining power amount R of the battery 3 may be always displayed on the display monitor 23, or may be switched and displayed only when necessary. The display form of the remaining power amount R may be a numerical display, a graph display, or a graphic display.

  In the case of the apparatus of the embodiment, the battery initial energy setting unit 20 saturates when the charging time exceeds the full charging time for changing the battery 3 from the zero charging state to the full charging state. When the electric energy is counted as the initial electric energy W and the charging time does not exceed the full charging time, the non-saturated electric energy held by the charging current for the charging time and the remaining electric energy immediately before the start of charging (the immediately remaining electric power) The total amount of r) is cut by the amount exceeding the saturation power amount (that is, the total is reduced to the saturation power amount) and set as the initial power amount W.

  As described above, in the apparatus of the embodiment, when the charging time measured by the charging time measuring unit 19 exceeds the full charging time, the saturated electric energy held in the full charging state is set as the initial electric energy W. Therefore, when the charging time exceeds the full charging time, an error that treats the invalid charging time exceeding the full charging time as the effective charging time can be avoided. In addition, if the charging time does not exceed the full charging time, the initial electric energy is cut by cutting the sum of the non-saturated electric energy held by the charging current for the charging time and the immediately preceding remaining electric energy r by the amount exceeding the saturated electric energy. Since it is set as W, even when the charging time does not exceed the full charging time, the remaining electric energy R is appropriately transferred as the initial electric energy W.

  Furthermore, as shown in FIG. 2, the apparatus of the embodiment includes a battery output voltage detection unit 24 that detects the output voltage value of the battery 3. When the output voltage value detected by the battery output voltage detector 24 is below the threshold value V at which no power substantially remains in the battery 3, the battery initial power amount setting unit 20 immediately before the remaining power amount r It is set as the structure which sets initial electric energy W by making zero into zero. As described above, when the output voltage value detected by the battery output voltage detection unit 24 is below the threshold value V at which the power does not substantially remain in the battery 3, the initial remaining power amount r is set to zero and the initial power amount. Since W is set, there is substantially no power remaining in the battery 3, and the immediately preceding remaining power amount r which is effective only in appearance and is substantially invalid is erroneously transferred to the initial power amount W. Can be avoided.

  Further, in the apparatus of the embodiment, when the output voltage value detected by the battery output voltage detection unit 24 is lower than the threshold value V at which the power does not substantially remain in the battery 3, the battery remaining power amount calculation unit 22. The remaining power amount is counted as zero, and the display monitor 23 which is a battery remaining power amount display means displays the remaining power amount as zero. As described above, when the output voltage value detected by the battery output voltage detection unit 24 is below the threshold value V at which the power does not substantially remain in the battery 3, the initial power amount is counted with the remaining power amount set to zero. -Since it is displayed, it can be avoided that the battery 3 is erroneously recorded and displayed as remaining in the battery 3 even though the power does not substantially remain.

  Note that the main control unit 25 is configured with a computer at the center, and according to the input operation necessary for the movement of the carriage or X-ray imaging performed by the operator at the operation panel P, the movement of the carriage, or the X-ray imaging. It sends the necessary commands and data to each part, and plays a role in operating the device without delay.

  Next, a process for counting the initial electric energy W of the battery 3 in the mobile X-ray imaging apparatus according to the embodiment will be described with reference to the drawings. FIG. 3 is a flowchart showing a process for setting the initial electric energy W of the battery 3 in the apparatus of the embodiment.

  [Step S1] An external power source (not shown) is connected to the charging input terminal 16 to charge the battery 3.

  [Step S2] The battery initial energy setting unit 20 checks whether or not the charging time due to charging exceeds the full charging time. If the charging time exceeds the full charging time, the process proceeds to Step 3 to set the full charging time. If not, jump to Step 4.

  [Step S3] The battery initial power amount setting unit 20 sets the saturation power amount held in the full charge state as the initial power amount W. This completes the initial power setting process.

  [Step S4] The battery initial power amount setting unit 20 checks whether or not the output voltage value detected by the battery output voltage detection unit 24 is below the threshold value V. When it is not below the threshold value V, the routine proceeds to step 5, and when it is below the threshold value V, the routine jumps to step 6.

  [Step S5] The battery initial power amount setting unit 20 cuts the sum of the non-saturated power amount held by the charging current for the charging time and the immediately preceding remaining power amount r by the amount exceeding the saturated power amount (that is, the sum is calculated). Set to initial power amount W). This completes the initial power setting process.

  [Step S6] The battery initial power amount setting unit 20 sets only the non-saturated power amount held at the charging current for the charging time as the initial power amount W with the immediately preceding remaining power amount r being zero. This completes the initial power setting process.

  Next, a process for calculating the remaining electric energy R of the battery 3 in the mobile X-ray imaging apparatus of the embodiment will be described with reference to the drawings. FIG. 4 is a flowchart showing a process for calculating the remaining electric energy R of the battery 3 in the apparatus of the embodiment.

  [Step SA] The battery residual energy calculation unit 22 checks whether the output voltage value detected by the battery output voltage detection unit 24 is below the threshold value V, and the output voltage value is below the threshold value V. If so, the process proceeds to step SB. If the output voltage value is not below the threshold value V, the process jumps to step SC.

  [Step SB] The battery remaining power amount calculation unit 22 calculates the remaining power amount R as zero, sets the display monitor 23 to continuously display the remaining power amount R as zero, and then jumps to step SE.

  [Step SC] The battery remaining power calculation unit 22 calculates the remaining power R of the battery 3 by subtracting the power consumption Q calculated by the battery power consumption calculation unit 21 from the initial power W.

  [Step SD] The display monitor 23 displays the remaining power R calculated by the battery remaining power calculation unit 22.

  [Step SE] If the calculation of the remaining power R is continued, the process returns to Step SA. If the calculation of the remaining power R is not continued, the calculation process of the remaining power R is completed.

  As described in detail above, in the case of the apparatus of the embodiment, the movement of the carriage required for calculating the remaining power amount of the battery 3 as the power source for the carriage movement and the driving power source for the X-ray imaging, A configuration in which the battery power consumption amount calculation unit 21 calculates the power consumption amount Q of the battery 3 generated by the execution of the X-ray imaging according to the operating current of the electric equipment for moving the carriage and the operating current of the electric equipment for X-ray imaging. The power consumption amount Q of the battery 3 is measured according to the operating current of the electric equipment for moving the cart and the electric equipment for X-ray photography without shaking caused by power consumption. As a result, the remaining power amount R of the battery calculated by the battery remaining power amount calculation unit 22 based on the consumed power amount Q of the battery 3 is naturally also accurate. Therefore, according to the mobile X-ray imaging apparatus of the embodiment, it is possible to accurately measure the remaining power amount of the battery 3 which is a power source for moving the carriage and a driving power source for X-ray imaging.

  The present invention is not limited to the above embodiment, and can be modified as follows.

  (1) In the case of the apparatus of the embodiment, when calculating the power consumption amount of the battery 3, it is not necessary to actually measure the operating current of the electric equipment for moving the carriage and the operating current of the electric equipment for radiography. However, the apparatus having the same configuration as the embodiment except for the configuration in which the operating current of the electric equipment for moving the carriage and the operating current of the X-ray imaging electric equipment is measured and the power consumption of the battery 3 is measured. As a modification.

  (2) In the case of the apparatus of the embodiment, the cart 1 is not equipped with a detector that detects an X-ray transmission image of the subject M, but is a flat panel X that detects an X-ray transmission image of the subject M. An apparatus having the same configuration as that of the embodiment can be cited as a modified example, except that a detector such as a line detector is mounted on the carriage 1 so as to face the X-ray tube 2.

  (3) In the case of the apparatus of the embodiment, the electric equipment for moving the carriage is the electric motor 4 for moving the carriage and the electric wheel brake 5, but the electric equipment for moving the carriage of the apparatus of the present invention is an electric motor. It is not limited to 4 or wheel brake 5.

  (4) In the case of the apparatus of the embodiment, the X-ray imaging electrical equipment was the X-ray irradiation unit 9, the collimator lamp 10, and the lock release mechanism 12. However, the electrical equipment for moving the carriage of the apparatus of the present invention is X The present invention is not limited to the line irradiation unit 9, the collimator lamp 10, and the lock release mechanism 12.

It is a perspective view which shows the mobile X-ray imaging apparatus of an Example. It is a block diagram which shows the principal part structure of the mobile X-ray imaging apparatus of an Example. It is a flowchart which shows the setting process of the initial stage electric energy of the battery in the apparatus of an Example. It is a flowchart which shows the calculation process of the residual electric energy of the battery in the apparatus of an Example. It is a front view which shows the conventional mobile X-ray imaging apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Dolly 2 ... X-ray tube 3 ... Battery 4 ... Electric motor (electric equipment for moving dolly)
5… Wheel brake (electric equipment for moving the carriage)
9 ... X-ray irradiation unit (electric equipment for X-ray imaging)
10 ... Collimator lamp (electric equipment for X-ray photography)
12 ... Unlocking mechanism (electric equipment for X-ray imaging)
19: Charging time measuring unit (charging time measuring means)
20 ... Initial battery energy setting unit (initial battery energy setting means)
21 ... Battery power consumption calculation unit (battery power consumption calculation means)
22 ... Battery remaining power calculation section (Battery remaining power calculation means)
23 ... Display monitor (remaining battery energy display means)
24 ... Battery output voltage detector (battery output voltage detector)
M… Subject

Claims (6)

  X-ray tube that irradiates the subject with X-rays on a movable carriage, rechargeable battery, electric equipment for moving the carriage that uses the battery as a power source to move the carriage, and X-ray tube In a mobile X-ray apparatus equipped with electrical equipment for X-ray imaging that operates using a battery as a driving power source in order to perform X-ray imaging with X-ray irradiation, the initial battery power for setting the initial power amount of the battery Power consumption setting means, battery power consumption calculating means for calculating the power consumption of the battery generated in the electric equipment for moving the carriage and the electric equipment for X-ray imaging due to the movement of the carriage and X-ray imaging, Battery residual energy calculation means for calculating the remaining battery energy based on the initial energy and the calculated battery energy consumption, and display the remaining battery energy Mobile X-ray imaging apparatus characterized by comprising a battery remaining power amount display means that.   2. The mobile X-ray imaging apparatus according to claim 1, further comprising charging time measuring means for measuring a charging time of the battery, wherein the battery initial power amount setting means is a charging power per unit time determined in advance for the battery. A mobile X-ray imaging apparatus that sets an initial power amount according to the product of the amount and the charging time measured by the charging time measuring means.   3. The mobile X-ray imaging apparatus according to claim 2, wherein the battery initial energy setting means holds the battery in a fully charged state when the charging time exceeds a full charging time for changing the battery from a zero charged state to a fully charged state. If the saturated energy is set as the initial energy and the charging time does not exceed the full charging time, the total of the non-saturated energy held by the charging current for the charging time and the remaining energy just before the start of charging A mobile X-ray imaging apparatus that cuts the amount exceeding the saturation power amount and sets it as the initial power amount.   4. The mobile X-ray imaging apparatus according to claim 1, further comprising battery output voltage detection means for detecting an output voltage value of the battery, wherein the battery initial power amount setting means is battery output voltage detection means. Mobile X-ray imaging apparatus that sets the initial power amount by setting the remaining power amount just before the start of charging to zero when the output voltage value detected by the value is below the threshold value at which the power does not substantially remain in the battery .   5. The mobile X-ray imaging apparatus according to claim 1, wherein the battery power consumption calculating means includes a power consumption per unit operation time determined in advance for the electric equipment for moving the carriage and the movement of the carriage. Add the product of the operating time of the electrical equipment, and the product of the power consumption per unit operating time and the operating time of the electrical equipment for X-ray radiography, which are obtained in advance for the electrical equipment for X-ray radiography. A mobile X-ray imaging device that accounts for power consumption. 6. The mobile X-ray imaging apparatus according to claim 1, further comprising battery output voltage detecting means for detecting an output voltage value of the battery, wherein the output voltage value detected by the battery output voltage detecting means is If the battery is below the threshold at which substantially no power remains, the battery remaining power calculation means counts the remaining power as zero, and the battery remaining power display means displays the remaining power as zero. Mobile X-ray imaging device.

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