JPH0594897A - X-ray control device - Google Patents

Abstract

(57) [Summary] [Purpose] Miniaturization, weight reduction, and low power consumption. [Configuration] Set tube voltage values and set tube current time product values that can be set are stored in advance in read-only storage means, and the storage means is set to the operating state only when the means for changing those values is operated. Read the desired one of those values.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray controller, and more particularly to an improvement of an X-ray controller suitable for a battery type X-ray controller for a round trip, which is required to be small in size, light in weight and low in power consumption.

[0002]

2. Description of the Related Art A conventional X-ray controller for battery round trip is composed of a clock generator, a microprocessor, an interrupt controller, a bus arbiter, a program memory, an input / output IC, an A / D converter, a D / A converter and the like. A microcomputer is used to set / change / display the tube voltage / tube current time product, and manage the X-ray tube short-term rating and equipment rating.

[0003]

However, a microcomputer is used for setting / changing / displaying the tube voltage / tube current time product and managing the X-ray tube short-time rating / apparatus rating as in the prior art. However, there is a problem that it is over-spec, the number of parts is large, it is difficult to reduce the size and weight, and the cost is high. Furthermore, in the control by the microcomputer, the microcomputer must always be operated even if the set tube voltage value change key or the set tube current value change key is not pressed, which causes a problem of consuming extra power. is there.

In view of the above, the present invention makes it possible to reduce the number of parts, reduce the size and weight, and also to reduce the cost. Further, the set tube voltage value change key and the set tube current value change key are pressed. It is an object of the present invention to provide an improved X-ray control device that can be operated only when it is operated to reduce power consumption.

[0005]

In order to achieve the above object, in the X-ray controller according to the present invention, a means for changing the set tube voltage value, a means for changing the set tube current time product value, and a setting method. Possible set tube voltage values are stored in advance, and a read-only tube voltage value storage means that becomes an operating state and outputs a desired tube voltage value only when the above-mentioned changing means is operated, and this output. Means for holding the set tube voltage value, means for controlling the tube voltage based on the held set tube voltage value, and a settable tube current time product value that can be set are stored in advance. A read-only tube current time product value storage means that becomes an operating state only when operated and outputs a desired tube current time product value, a means for holding this set tube current time product value, and the above-mentioned held Setting tube voltage value The present invention is characterized by including means for displaying the set tube current time product value and timer means for generating an X-ray cutoff signal when the set tube current time product value is reached. The current-time product value that can be set is stored in advance in the read-only storage means,
Since this storage means is in an operating state only when the means for changing those values is operated, the power consumption can be reduced, and the set tube voltage value and the set tube current time product value can be displayed without using a microcomputer. Changes and management of X-ray tube short-term rating and equipment rating can be performed, and the number of parts can be reduced and the size and weight can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1, 2 and 3 are block diagrams showing respective parts of an X-ray controller according to an embodiment of the present invention. First, FIG. 1 shows a part for setting / changing. As shown in this figure, four key switches 11 are provided.
~ 14 are provided. The key switches 11 and 12 are for setting and changing the tube voltage (KV) value. When the key switch 11 is pressed, a KV + signal for changing to the plus side is generated, and when the key switch 12 is pressed, it is changed to the minus side. The KV- signal occurs. The key switches 13 and 14 are for setting and changing the tube current time product (mAs) value. When the key switch 13 is pressed, the value is changed to the positive side.
An As + signal is generated, and when the key switch 14 is pressed, a mAs- signal that changes to the minus side is generated.

When any of these key switches 11 to 14 is pressed, any of the KV + signal, KV- signal, mAs + signal and mAs- signal becomes L, as shown in FIG. These signals first become H at time a and become L at time b when they are pressed. Then, at this time point b, the output of the OR circuit 21 becomes H as shown in (b) of FIG.
And the key-on signal output from the inverting circuit 22 is L
become. That is, the fact that the key-on signal becomes L is
It means that any key switch was pressed. O
The output of the R circuit 21 is sent to the one-shot circuit 23,
As shown in (f) of FIG. 4, a latch signal is output for a certain period of time from time b when the output of the OR circuit 21 becomes H.

FIG. 2 shows the storage and output section of the X-ray control apparatus, which includes two ROMs (read-only memory) 31,
41 and latch circuits 32 and 42. R
The OM 31 and the latch circuit 32 are for KV, and the ROM 4
1 and the latch circuit 42 are for mAs. That is, R
A tube voltage value that can be set in advance is written in the OM 31 as a value in units of 1 KV from 40 KV to 125 KV. Further, a tube current time product value that can be set is written in the ROM 41 for each position, for example, from 0.5 mAs (position 1) to 125 mAs (position 25). These values are written when the device is shipped or adjusted.

When the key-on signal is L (from the time point b), these ROMs 31 and 41 are in the operating state, and the address signal is input as shown in FIG. 4D (the terminal on the left side of the figure is the address input terminal). The value read from the designated address (the output terminal is on the right side) is output from the time point c as shown in FIG. 4E. This output signal is sent to the latch circuits 32 and 42,
The latch signal is latched at the timing (time d) when the latch signal changes from L to H. Then, as shown in (g) of FIG. 4, the set tube voltage value signal and the set tube current time product value signal are output from the latch circuits 32 and 42 at the time point e. The set tube voltage value signal and the set tube current time product value signal are sent to the ROMs 31 and 41 as part of the address signal, and are fetched as an address input at the time point f.

That is, in the ROM 31, the address is changed by the KV + signal and the KV- signal from the address designated by the set tube voltage value signal at the previous setting, and when the KV + signal becomes L, 1 KV is added. The tube voltage value signal is read out, and when the KV- signal becomes L, the tube voltage value signal minus 1 KV is read out. Further, in the ROM 41, the address is changed from the address designated by the set tube current time product value signal at the time of the previous setting by the mAs + signal and the mAs- signal, and when the mAs + signal becomes L, one position plus side. The tube current time product value signal is read, and when the mAs- signal becomes L, the tube current time product value signal minus one position is read.

When the device rating is as shown in FIG. 5 and the short-time rating of the tube is as shown in FIG. 6, the ROM 3 outputs the above output within the range where these ratings are satisfied.
It is read from 1, 41. Since the set tube voltage value signal and the set tube current time product value signal are input to the ROMs 31 and 41 as address signals, it is determined whether or not they are within this rated range. .. In other words, when setting to exceed these ratings, for example, by pressing the key switch 11, KV
Even if a + signal is input, the KV value plus 1 KV will not be output, and the KV value corresponding to the maximum value of the previously set rating will be output.
At the end of the rating, the KV value and the mAs value are neither added nor subtracted such that the value is read.

The set tube voltage value signal and the set tube current time product value signal thus latched by the latch circuits 32 and 42 are
As shown in FIG. 3, it is sent to the set tube voltage display circuit 60 and the set tube current time product display circuit 70, respectively. These display circuits 60 and 70 are three-digit numerical indicators 65 to 67 and 75.
~ 77, its drive circuits 62-64, 72-74, and 2
1 for the set tube voltage value signal and the set tube current time product value signal
It is provided with conversion circuits 61 and 71 for converting it into a base 0 value, and each set value is displayed as a 3-digit decimal number.

The set tube voltage value signal is also sent to the D / A conversion circuit 51 of the X-ray tube voltage control circuit to generate a tube voltage according to the set value. The set tube current time product value signal is sent to the tube current time product timer circuit 80. This tube current time product timer circuit 80 is a conversion circuit 8 for converting the set tube current time product value signal into the count value of the timer circuit 82.
1 and a timer circuit 82. The timer circuit 82 starts counting according to the X-ray exposure signal, and when the count value reaches the count value output from the conversion circuit 81, the X-ray Generate a shutoff signal.

Before any of the key switches 11 to 14 is pressed (time a), the key-on signal is kept at H, and when it is released at time g after being pressed, no key is pressed. Then, the key-on signal returns to H. ROM3
Nos. 1 and 41 are in the operating state only when the key-on signal is L, and are in the non-operating state when the key-on signal is H, and are in a state of consuming very little power. The ROMs 31 and 41 consume the most power among the various ICs having this circuit configuration. However, since the ROMs 31 and 41 are configured to consume no power unless the key switches 11 to 14 are pressed,
Overall power consumption can be suppressed.

Although 128 kbyte EPROMs are used as the ROMs 31 and 41 in this embodiment, any ROM having a capacity larger than that can be used. Further, the ROM 31 for storing the settable tube voltage value and the ROM 41 for storing the settable tube current time product value are respectively 8
Although a bit output ROM is used, if a 16 bit output ROM is used, these two ROMs 31 and 41 are
It can be configured with one ROM.

[0016]

As described above with reference to the embodiments, according to the X-ray control apparatus of the present invention, the setting tube voltage value and the setting tube current time product value are changed, displayed and the X-ray tube is operated without microcomputer control. It is possible to manage the short-term rating and device rating, etc., and it is possible to reduce the size and weight by reducing the number of parts, and at a low cost, making it suitable for low-cost X-ray control devices such as chest radiography devices. is there. Further, the failure rate can be reduced as the number of parts is reduced. Since the power consumption can be further reduced, the number of times of charging the battery can be reduced and the life of the battery can be extended.

[Brief description of drawings]

FIG. 1 is a partial block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of another portion of the embodiment.

FIG. 3 is a block diagram of the rest of the embodiment.

FIG. 4 is a time chart for explaining the operation of the embodiment.

FIG. 5 is a graph showing a device rating of the example.

FIG. 6 is a graph showing a short-term rating of the X-ray tube of the same example.

[Explanation of symbols]

 11-14 Key switch 21 OR circuit 22 Inversion circuit 23 One-shot circuit 31, 41 ROM 32, 42 Latch circuit 51 D / A conversion circuit 60 Setting tube voltage display circuit 70 Setting tube current time product display circuit 80 Tube current time product timer circuit

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[Procedure amendment]

[Submission date] June 19, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of invention X-ray controller

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray controller, and more particularly to an improvement of an X-ray controller suitable for a battery type X-ray controller for a round trip, which is required to be small in size, light in weight and low in power consumption.

[0002]

2. Description of the Related Art A conventional X-ray controller for battery round trip is composed of a clock generator, a microprocessor, an interrupt controller, a bus arbiter, a program memory, an input / output IC, an A / D converter, a D / A converter and the like. A microcomputer is used to set / change / display the tube voltage / tube current time product, and manage the X-ray tube short-term rating and equipment rating.

[0003]

However, a microcomputer is used for setting / changing / displaying the tube voltage / tube current time product and managing the X-ray tube short-time rating / apparatus rating as in the prior art. However, there is a problem that it is over-spec, the number of parts is large, it is difficult to reduce the size and weight, and the cost is high. Furthermore, in the control by the microcomputer, the microcomputer must always be operated even if the set tube voltage value change key or the set tube current value change key is not pressed, which causes a problem of consuming extra power. is there.

In view of the above, the present invention makes it possible to reduce the number of parts, reduce the size and weight, and also to reduce the cost. Further, the set tube voltage value change key and the set tube current value change key are pressed. It is an object of the present invention to provide an improved X-ray control device that can be operated only when it is operated to reduce power consumption.

[0005]

In order to achieve the above object, in the X-ray controller according to the present invention, a means for changing the set tube voltage value, a means for changing the set tube current time product value, and a setting method. Possible set tube voltage values are stored in advance, and a read-only tube voltage value storage means that becomes an operating state and outputs a desired tube voltage value only when the above-mentioned changing means is operated, and this output. Means for holding the set tube voltage value, means for controlling the tube voltage based on the held set tube voltage value, and a settable tube current time product value that can be set are stored in advance. A read-only tube current time product value storage means that becomes an operating state only when operated and outputs a desired tube current time product value, a means for holding this set tube current time product value, and the above-mentioned held Setting tube voltage value The present invention is characterized by including means for displaying the set tube current time product value and timer means for generating an X-ray cutoff signal when the set tube current time product value is reached. The current-time product value that can be set is stored in advance in the read-only storage means,
Since this storage means is in an operating state only when the means for changing those values is operated, the power consumption can be reduced, and the set tube voltage value and the set tube current time product value can be displayed without using a microcomputer. Changes and management of X-ray tube short-term rating and equipment rating can be performed, and the number of parts can be reduced and the size and weight can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1, 2 and 3 are block diagrams showing respective parts of an X-ray controller according to an embodiment of the present invention. First, FIG. 1 shows a part for setting / changing. As shown in this figure, four key switches 11 are provided.
~ 14 are provided. The key switches 11 and 12 are for setting and changing the tube voltage (KV) value. When the key switch 11 is pressed, a KV + signal for changing to the plus side is generated, and when the key switch 12 is pressed, it is changed to the minus side. The KV- signal occurs. The key switches 13 and 14 are for setting and changing the tube current time product (mAs) value. When the key switch 13 is pressed, the value is changed to the positive side.
An As + signal is generated, and when the key switch 14 is pressed, a mAs- signal that changes to the minus side is generated.

When any of these key switches 11 to 14 is pressed, any of the KV + signal, KV- signal, mAs + signal and mAs- signal becomes L, as shown in FIG. These signals first become H at time a and become L at time b when they are pressed. Then, at this time point b, the output of the OR circuit 21 becomes H as shown in (b) of FIG.
And the key-on signal output from the inverting circuit 22 is L
become. That is, the fact that the key-on signal becomes L is
It means that any key switch was pressed. O
The output of the R circuit 21 is sent to the one-shot circuit 23,
As shown in (f) of FIG. 4, a latch signal is output for a certain period of time from time b when the output of the OR circuit 21 becomes H.

FIG. 2 shows the storage and output section of the X-ray control apparatus, which includes two ROMs (read-only memory) 31,
41 and latch circuits 32 and 42. R
The OM 31 and the latch circuit 32 are for KV, and the ROM 4
1 and the latch circuit 42 are for mAs. That is, R
A tube voltage value that can be set in advance is written in the OM 31 as a value in units of 1 KV from 40 KV to 125 KV. Further, a tube current time product value that can be set is written in the ROM 41 for each position, for example, from 0.5 mAs (position 1) to 125 mAs (position 25). These values are written when the device is shipped or adjusted.

When the key-on signal is L (from the time point b), these ROMs 31 and 41 are in the operating state, and the address signal is input as shown in FIG. 4D (the terminal on the left side of the figure is the address input terminal). The value read from the designated address (the output terminal is on the right side) is output from the time point c as shown in FIG. 4E. This output signal is sent to the latch circuits 32 and 42,
The latch signal is latched at the timing (time d) when the latch signal changes from L to H. Then, as shown in (g) of FIG. 4, the set tube voltage value signal and the set tube current time product value signal are output from the latch circuits 32 and 42 at the time point e. The set tube voltage value signal and the set tube current time product value signal are sent to the ROMs 31 and 41 as part of the address signal, and are fetched as an address input at the time point f.

That is, in the ROM 31, the address is changed by the KV + signal and the KV- signal from the address designated by the set tube voltage value signal at the previous setting, and when the KV + signal becomes L, 1 KV is added. The tube voltage value signal is read out, and when the KV- signal becomes L, the tube voltage value signal minus 1 KV is read out. Further, in the ROM 41, the address is changed from the address designated by the set tube current time product value signal at the time of the previous setting by the mAs + signal and the mAs- signal, and when the mAs + signal becomes L, one position plus side. The tube current time product value signal is read, and when the mAs- signal becomes L, the tube current time product value signal minus one position is read.

When the device rating is as shown in FIG. 5 and the short-time rating of the tube is as shown in FIG. 6, the ROM 3 outputs the above output within the range where these ratings are satisfied.
It is read from 1, 41. Since the set tube voltage value signal and the set tube current time product value signal are input to the ROMs 31 and 41 as address signals, it is determined whether or not they are within this rated range. .. In other words, when setting to exceed these ratings, for example, by pressing the key switch 11, KV
Even if a + signal is input, the KV value plus 1 KV will not be output, and the KV value corresponding to the maximum value of the previously set rating will be output.
At the end of the rating, the KV value and the mAs value are neither added nor subtracted such that the value is read.

The set tube voltage value signal and the set tube current time product value signal thus latched by the latch circuits 32 and 42 are
As shown in FIG. 3, it is sent to the set tube voltage display circuit 60 and the set tube current time product display circuit 70, respectively. These display circuits 60 and 70 are three-digit numerical indicators 65 to 67 and 75.
~ 77, its drive circuits 62-64, 72-74, and 2
1 for the set tube voltage value signal and the set tube current time product value signal
It is provided with conversion circuits 61 and 71 for converting it into a base 0 value, and each set value is displayed as a 3-digit decimal number.

The set tube voltage value signal is also sent to the D / A conversion circuit 51 of the X-ray tube voltage control circuit to generate a tube voltage according to the set value. The set tube current time product value signal is sent to the tube current time product timer circuit 80. This tube current time product timer circuit 80 is a conversion circuit 8 for converting the set tube current time product value signal into the count value of the timer circuit 82.
1 and a timer circuit 82. The timer circuit 82 starts counting according to the X-ray exposure signal, and when the count value reaches the count value output from the conversion circuit 81, the X-ray Generate a shutoff signal.

Before any of the key switches 11 to 14 is pressed (time a), the key-on signal is kept at H, and when it is released at time g after being pressed, no key is pressed. Then, the key-on signal returns to H. ROM3
Nos. 1 and 41 are in the operating state only when the key-on signal is L, and are in the non-operating state when the key-on signal is H, and are in a state of consuming very little power. The ROMs 31 and 41 consume the most power among the various ICs having this circuit configuration. However, since the ROMs 31 and 41 are configured to consume no power unless the key switches 11 to 14 are pressed,
Overall power consumption can be suppressed.

Although 128 kbyte EPROMs are used as the ROMs 31 and 41 in this embodiment, any ROM having a capacity larger than that can be used. Further, the ROM 31 for storing the settable tube voltage value and the ROM 41 for storing the settable tube current time product value are respectively 8
Although a bit output ROM is used, if a 16 bit output ROM is used, these two ROMs 31 and 41 are
It can be configured with one ROM.

In the above embodiment, the tube voltage value that can be set is 4
There are 85 positions in units of 1KV from 0KV to 125KV. Therefore, for example, change the tube voltage value from 40 KV to 12
When changing up to 5 KV, it is necessary to press the key switch 11 85 times, and the operability is poor. So the second
In the embodiment of (3), this is improved and the operability is improved.

In the second embodiment, as shown in FIG. 7, the output of the OR circuit 21 to which the signals from the key switches 11 to 14 are input is sent to the gated oscillator circuit 24 to obtain a rectangular wave key pulse signal. Then, the tube voltage value is continuously changed by this key pulse signal. In FIG. 7, the same parts as those in the first embodiment are omitted and only different parts are shown. The oscillating circuit with gate 24 is mainly composed of four inverting amplifier circuits, and starts oscillating when the input becomes H, and its oscillating frequency f1 is f1 = 1 / (depending on the values of the capacitor C and the resistor R. 2.2 × C × R), and the period T1 is T1 = 1 / f1.

Here, when the key switch 11 is pressed,
The description will be made assuming that the KV + signal becomes L as shown in (a) of (a) (time b in FIG. 8). At this time, the output of the OR circuit 21 becomes H as shown in FIG. 8B and the key-on signal becomes L as shown in FIG. 8C because it is inverted by the inverting circuit 22. .. When the key-on signal becomes L, the ROM 31 is in the operating state as shown in FIG. At this time, the set tube current time product value signal and the set tube voltage value signal applied to the address input terminal on the left side (FIG. 7) of the ROM 31 are not taken in as the address input as shown in (e) of FIG. , KV + signal is this ROM 31
Since it is directly added to the data input terminal, a value one position higher than the value specified by these address inputs is read out, and the data output terminals D0 to D6 on the right side of the figure read from the time point c as shown in (f) of FIG. It is generated and input to the latch circuit 32. Another data output terminal D7 of the ROM 31
Is the data output terminals D0 to D as shown in FIG.
It goes high only while the output from 6 occurs.

On the other hand, when the output of the OR circuit 21 becomes H, the gated oscillating circuit 24 starts oscillating and generates a rectangular wave key pulse signal having a period T1 as shown in (g) of FIG. This key pulse signal is inverted by the inverting circuit 29 to become an inverted key pulse signal as shown in FIG.

This key pulse signal is sent to the AND circuit 26, and the other input terminal of the AND circuit 26 has an O value.
The output of the R circuit 21 is sent, and since the output of the OR circuit 21 is H from the time point b, the output of the AND circuit 26 is equivalent to the key pulse signal. The output of the AND circuit 26 is sent to the clock terminal of the flip-flop 27, and the output of the Q terminal of the flip-flop 27 becomes H as shown in (i) of FIG. 8 in response to the rising edge of the AND circuit 26.

Q of the flip-flop 27 which has become H
Although the terminal output is sent to the AND circuit 28, the above-mentioned inverted key pulse signal is sent to the other input of the AND circuit 28.
A signal as indicated by (n) is obtained, and this is sent to the latch circuit 32 as a latch signal. The latch circuit 32 holds the signal input from the ROM 31 in response to the rising edge of the latch signal (time point d), and at the time point e as shown in FIG. Output as.

This new set tube voltage value signal is added as an address input to the ROM 31 from the time point f as shown in FIG. 8E, and the value advanced from the ROM 31 by one position is shown in FIG. ), It is output from the time point g. The gated oscillating circuit 24 continues to oscillate, and at the time h when the inverted key pulse signal becomes H again, A
Since the latch signal from the ND circuit 28 becomes H, this R
The value newly output from the OM 31 is latched by the latch circuit 32 at this time point, and is output as the set tube voltage value signal at the time point i. The new set tube voltage value signal is applied to the ROM 31 as an address input from the time point j, and the operation is repeated, and the set tube voltage value signal automatically rises position by position.

The output of the data output terminal D7 of the ROM 31 is input to the AND circuit 91 together with the above-mentioned inverted key pulse signal, and as a result, the output of the AND circuit 91 is shown in FIG. It becomes H as shown in (wa). The output of the AND circuit 91 is sent to the clock terminal of the counter 92, and the counter 92 performs the counting operation in response to the rising edge thereof. First, at time d, the counter 92 counts "1", and its QA output terminal becomes H, as shown in FIG.

The output of the AND circuit 91 becomes L in response to the data output terminal D7 of the ROM 31 becoming L. Next, this output terminal D7 becomes H, and the inverted key pulse signal becomes H again at the time point h. When it becomes, it becomes H. In response to this, the counter 92 counts “2”, and the QA
When the terminal becomes L as shown in Fig. 8F, QB
The output terminal becomes H as shown in FIG.

By repeating such an operation, the set tube voltage value signal automatically increases by one position and the count of the counter 92 increases by one. The repetition cycle at this time is determined by the oscillation cycle T1 of the gated oscillation circuit 24. When this operation is repeated five times, the counter 92 counts "5", and its QA output terminal and QC output terminal both become H from the time point m as shown in (f) and (t) of FIG. As a result, the output of the AND circuit 93 to which these are input becomes H. The output of the AND circuit 93 is applied to the clock terminal of the flip-flop 94, and the inverted Q output terminal of the flip-flop 94 becomes L from the time point m as shown in FIG.

Then, the switch 25 of the gated oscillator circuit 24 is turned on, and the resistor R1 is connected in parallel to the resistor R. Therefore, this gated oscillator circuit 2
The oscillation frequency of 4 is changed to f2 shown in the following equation. f2 = 1 / [2.2 × C × {R × R1 / (R + R1)}] The oscillation period T2 is T2 = 1 / f2. If R and R1> 0, then T2 <T1
As shown in (g) of FIG. 8, the oscillation cycle becomes shorter and the speed at which the tube voltage setting value is changed becomes faster. Therefore, if the key switch 11 is continuously pressed, the tube voltage setting value increases at a relatively slow speed up to the fifth position, and increases at a high speed after the sixth position.

When the key switch 11 is released when the desired tube voltage set value is reached, the KV + signal becomes H and the output of the OR circuit 21 becomes L. Then the gated oscillator 24
Oscillates, and as a result, the change of the tube voltage setting value is stopped (time k in FIG. 8). When the output of the OR circuit 21 becomes L, the output (key-on signal) of the inverting circuit 22 becomes H and R
The operation of the OM 31 is stopped. At this time, the set tube voltage value signal output from the latch circuit 32 becomes the value finally latched by the latch circuit 32 (at time n).

In the second embodiment, the key switch 11,
The set tube voltage value signal is continuously changed by continuously pressing any one of 12 and the change speed is increased when the number of positions is continuously changed. The product value can be continuously changed by continuously pressing one of the key switches 13 and 14, and the change speed can be increased from a certain point. For the ROM 41 and the latch circuit 42 in FIG.
This is possible by adopting the same configuration as.

[0029]

As described in the above embodiments, according to the X-ray controller of the present invention, the setting tube voltage value and the setting tube current time product value can be changed, displayed, and displayed without using a microcomputer. It is possible to manage the short-term rating and device rating, etc., and it is possible to reduce the size and weight by reducing the number of parts, and at a low cost, making it suitable for low-cost X-ray control devices such as chest radiography devices. is there. Further, the failure rate can be reduced as the number of parts is reduced. Since the power consumption can be further reduced, the number of times of charging the battery can be reduced and the life of the battery can be extended.

[Brief description of drawings]

FIG. 1 is a partial block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of another portion of the embodiment.

FIG. 3 is a block diagram of the rest of the embodiment.

FIG. 4 is a time chart for explaining the operation of the embodiment.

FIG. 5 is a graph showing a device rating of the example.

FIG. 6 is a graph showing a short-term rating of the X-ray tube of the same example.

FIG. 7 is a partial block diagram of a second embodiment of the present invention.

FIG. 8 is a time chart for explaining the operation of the second embodiment.

[Description of Reference Signs] 11 to 14 Key switch 21 OR circuit 22, 29 Inversion circuit 23 One-shot circuit 24 Oscillation circuit with gate 26, 28, 91, 93 AND circuit 27, 94 Flip-flop 31, 41 ROM 32, 42 Latch circuit 51 D / A conversion circuit 60 Setting tube voltage display circuit 70 Setting tube current time product display circuit 80 Tube current time product timer circuit 92 Counter

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction content]

[Figure 7]

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Added

[Correction content]

[Figure 8]

Claims (1)

[Claims] 1. A means for changing a set tube voltage value, a means for changing a set tube current time product value, and a settable tube voltage value that can be set are stored in advance, and when the changing means is operated. Read-only tube voltage value storage means that outputs a desired tube voltage value only in the operating state, a means that holds the output set tube voltage value, and a tube voltage value storage means based on the held set tube voltage value. A read-out means for controlling the voltage and a set tube current time product value that can be set are stored in advance, and become active only when the changing means is operated to output a desired tube current time product value. Dedicated tube current time product value storage means, means for holding this set tube current time product value, means for displaying the held set tube voltage value and set tube current time product value, set tube current time X-ray cutoff signal when the product value is reached An X-ray control device, comprising: timer means for generating a signal.