CN201945894U - Pressure control circuit of compressor and X-ray machine - Google Patents
Pressure control circuit of compressor and X-ray machine Download PDFInfo
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- CN201945894U CN201945894U CN 201120035048 CN201120035048U CN201945894U CN 201945894 U CN201945894 U CN 201945894U CN 201120035048 CN201120035048 CN 201120035048 CN 201120035048 U CN201120035048 U CN 201120035048U CN 201945894 U CN201945894 U CN 201945894U
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Abstract
The utility model discloses a pressure control circuit of a compressor and an X-ray machine. The pressure control circuit of the compressor comprises a bidirectional thyristor, a bidirectional diode, a charging capacitor and at least two stages of pressure regulating units, wherein each stage of pressure regulating unit comprises a pressure setting switch, a pressure control relay and a charging resistor corresponding to pressure at the stage, each stage of pressure regulating unit corresponds to a set compressor pressure, and different pressure regulating units correspond to different compressor pressures. According to the technical scheme of the utility model, different torques can be output and the compressor can obtain different compression forces.
Description
Technical field
The utility model relates to the pressure control circuit and the X-ray machine in X-ray machine field, particularly a kind of compression device.
Background technology
X-ray machine is widely used in health care, education of science, every field such as industry.Wherein, being applied to the health care X-ray machine that diagnoses the illness that assists a physician is to utilize X ray to see through human exposure according to the density difference of institutional frameworks such as human body intramuscular, bone to carry out imaging on slice, thin piece.
When patient is carried out imaging,, can use compression device often in order to obtain lesion image and better pictures effect more clearly.For example, when the stomach and intestine to human body carried out imaging, because stomach and intestine are many folds and partly overlapping, and focus was located in the fold the inside sometimes, perhaps with other organ overlaids.If directly pass through the X-ray machine imaging, then can cause focus to be difficult to see clearly or can not discern, cause the serious consequence of mistaken diagnosis.And utilize compression device to applying a suitable pressure near lesions position or the focus, fold and overlapping organ can be separated, to obtain better diagnostic result.
Because for different patients, needed pressure is different.If pressure is excessive, will cause patient's pain, even tissue damage.But the output pressure of compression device has only one grade at present, is nonadjustable.Pressure size during practical application can be carried out real-time regulated by the deformation of compressing bar and patient body on the basis of this pressure.If but misoperation is easy to form compressing.
The utility model content
In view of this, the utility model proposes a kind of pressure control circuit and a kind of X-ray machine of compression device, with thinking that compression device provides different pressure.
The pressure control circuit of the compression device that the utility model provides, comprise: logic control element and alternating current torque motor, this circuit also comprises: bidirectional triode thyristor, bilateral diode, charging capacitor, and two-stage pressure regulating unit at least, wherein, pressure regulating units at different levels include a pressure and switch, pressure-control relay and one are set to charging resistor that should rank pressure; The end that each stage pressure is provided with switch links to each other with logic control element respectively, other end ground connection; One end of pressure-control relaies at different levels links to each other with logic control element respectively, other end ground connection; One end of charging resistors at different levels links to each other with an end of charging capacitor and an end of bilateral diode by the normally opened contact of corresponding pressure-control relay respectively; The other end links to each other with first port of input power supply respectively; The other end of charging capacitor links to each other with the U1 interface of alternating current torque motor; The other end of bilateral diode links to each other with the The Trigger of Bidirectional Triode Thyristor end; A link of bidirectional triode thyristor links to each other with first port of input power supply, and another link links to each other with the U1 interface of alternating current torque motor.
In one embodiment, the described pressure regulating unit of two-stage at least is: three stage pressure regulons.
Preferably, described pressure control circuit further comprises: pressure transducer and pressure amplifier, and wherein, the input end of pressure amplifier links to each other with the output terminal of pressure transducer, and the output terminal of pressure amplifier links to each other with logic control element.
The X-ray machine that the utility model provides comprises compression device and above-mentioned pressure control circuit, and wherein, pressure control circuit is connected with compression device, and controls the pressure of described compression device.
From such scheme as can be seen, owing to also comprise bidirectional triode thyristor in the pressure control circuit of compression device in the utility model, bilateral diode, charging capacitor and two-stage pressure regulating unit at least, and pressure regulating units at different levels include a pressure switch are set, pressure-control relay and one are to charging resistor that should rank pressure, by the charging resistor in the pressure regulating unit of control different stage charging capacitor is charged, make bilateral diode D2 in different time length internal trigger bidirectional triode thyristor T1 conducting, and then make alternating current torque motor obtain the voltage of different big or small effective values, thereby the moment of the different sizes of output makes compression device obtain the compressing power of different sizes.
In addition, by pressure transducer and amplifier further are set, can make system whether stop alternating current torque motor in the utility model,, avoid compressing so that compressing power is regulated according to the size decision of compressing power.
Description of drawings
To make clearer above-mentioned and other feature and advantage of the present utility model of those of ordinary skill in the art by describe preferred embodiment of the present utility model in detail with reference to accompanying drawing below, in the accompanying drawing:
Fig. 1 is the structural representation of a kind of pressure control circuit of compression device in the background technology.
Fig. 2 is the exemplary configurations synoptic diagram of the pressure control circuit of a kind of compression device among the utility model embodiment.
Fig. 3 is the structural representation of an example of the pressure control circuit of a kind of compression device among the utility model embodiment.
Fig. 4 is the ON time synoptic diagram of corresponding different charging resistor resistance bidirectional triode thyristors among the utility model embodiment.
Embodiment
Before the pressure control circuit of the compression device in describing the utility model embodiment, the concise and to the point earlier pressure control circuit of describing a kind of compression device, as a setting.
Fig. 1 is a kind of structural representation of compressing power control circuit of compression device.As shown in Figure 1, this circuit comprises: the first motion control switch S 1, the second motion control switch S 2, motion enable operation capacitor C 1 and the logic control element of relay K 1, direction pilot relay K2, alternating current torque motor M, alternating current torque motor M.The situation that mainly with the logic control element is CPU (central processing unit) (CPU) herein is that example is described, as the CPU among Fig. 1 11.During specific implementation, logic control element also can be the logic control element of other ways of realization such as logical circuit or logic chip.
Wherein, an end of the first motion control switch S 1 and the second motion control switch S 2 links to each other other end ground connection respectively with CPU 11.The end that motion enables relay K 1 links to each other other end ground connection with CPU 11.The end of direction pilot relay K2 links to each other with CPU 11, other end ground connection.
The U1 interface of alternating current torque motor M enables relay K 1 by motion normally opened contact links to each other with first port of input power supply, the normally closed contact of the U2 interface direction of passage pilot relay K2 of alternating current torque motor M links to each other with second port of input power supply, and the normally opened contact of the Z2 interface direction of passage pilot relay K2 of alternating current torque motor M also links to each other with second port of input power supply.The U2 interface of alternating current torque motor M links to each other with the two ends of operation capacitor C 1 respectively with the Z2 interface.
When pressing the first motion control switch S 1, under the control of CPU 11, motion enables relay K 1 adhesive, not adhesive of direction pilot relay K2, and alternating current torque motor M moves upward; When pressing the second motion control switch S 2, under the control of CPU 11, motion enables relay K 1 adhesive, also adhesive of direction pilot relay K2, and alternating current torque motor M moves downward.Certainly, also can be arranged to, alternating current torque motor M moves downward when pressing the first motion switch S1, and alternating current torque motor M moves upward when pressing the second motion switch S2.
As seen, motion enable relay K 1 when electric, alternating current torque motor M can move.Direction pilot relay K2 gets when electric, and alternating current torque motor M moves downward, otherwise alternating current torque motor M moves upward.
One grade of output pressure of compression device is the maximum output pressure of alternating current torque motor M when input supply voltage Uin at present.
Because for different patients, needed pressure is different.If pressure is excessive, will cause patient's pain, even tissue damage.Therefore, in order to address this problem, embodiment of the present utility model provides a kind of pressure control circuit that two grades of output pressures can be provided at least.
For making the purpose of this utility model, technical scheme and advantage clearer, by the following examples the utility model is further described.
In the utility model, consider the AC characteristic of alternating current torque motor, the output torque of alternating current torque motor and the input voltage of alternating current torque motor relation in direct ratio, promptly the input voltage of alternating current torque motor is high more, and the output torque of alternating current torque motor is big more.So the output torque that just can regulate alternating current torque motor by the input voltage of regulating alternating current torque motor in the utility model.
In order to realize adjusting to the alternating current torque motor input voltage, adopt bidirectional triode thyristor to regulate in the utility model, principle of work according to bidirectional triode thyristor, when trigger end has the voltage input, bidirectional triode thyristor will conducting, by regulating the conduction angle of bidirectional triode thyristor, can realize adjusting to alternating current torque motor M input voltage.
In order to realize adjusting to bidirectional triode thyristor, connect a bilateral diode at the The Trigger of Bidirectional Triode Thyristor end in the utility model, because bilateral diode has individual threshold voltage usually, with threshold voltage for+30V and-situation of 30V is an example, when input voltage be higher than+during 30V, bilateral diode conducting, bidirectional triode thyristor work, perhaps input voltage is lower than-bilateral diode conducting during 30V, bidirectional triode thyristor work.When charging capacitor C2 being charged by charging resistor R, the voltage on the electric capacity can reach in the certain hour in time-delay+30V or-30V, thereby make the bilateral diode conducting, and then trigger bidirectional triode thyristor.As seen, by regulating the resistance of charging resistor R, just can regulate the conduction angle of bidirectional triode thyristor.
Fig. 2 is the structural representation of a kind of compression device pressure control circuit among the utility model embodiment.As shown in Figure 2, the operation capacitor C 1 of CPU 11, the first motion control switch S 1, the second motion control switch S 2, direction pilot relay K2, alternating current torque motor M and the alternating current torque motor M of this pressure control circuit in comprising Fig. 1, also comprise: bidirectional triode thyristor T1, bilateral diode D2, charging capacitor C2, and two-stage pressure regulating unit at least, first order pressure regulating unit to the n stage pressure regulon as shown in Figure 2, n is the integer more than or equal to 2.Pressure regulating units at different levels include a pressure and switch, pressure-control relay and one are set to charging resistor that should rank pressure.First order pressure as shown in Figure 2 is provided with switch S 3 ..., the n stage pressure is provided with switch S (n+2); First order pressure-control relay K3 ..., n stage pressure pilot relay K (n+2); First order charging resistor R1 ..., n level charging resistor Rn.The pressure of the corresponding setting of every stage pressure regulon, the pressure of the corresponding different values of different pressures regulon.
Wherein, an end of the first motion control switch S 1 and the second motion control switch S 2 links to each other other end ground connection respectively with CPU 11.The end of direction pilot relay K2 links to each other with CPU 11, other end ground connection.
The normally closed contact of the U2 interface direction of passage pilot relay K2 of alternating current torque motor M links to each other with second port of input power supply, and the normally opened contact of the Z2 interface direction of passage pilot relay K2 of alternating current torque motor M also links to each other with second port of input power supply.The U2 interface of alternating current torque motor M links to each other with the two ends of operation capacitor C 1 respectively with the Z2 interface.
Each stage pressure be provided with switch (be that first order pressure among Fig. 2 is provided with switch S 3 ..., the n stage pressure is provided with switch S (n+2)) an end link to each other other end ground connection respectively with CPU 11.
Pressure-control relaies at different levels (be the first order pressure-control relay K3 among Fig. 2 ..., n stage pressure pilot relay K (n+2)) an end link to each other other end ground connection respectively with CPU 11.
Charging resistors at different levels (are the first order charging resistor R1 among Fig. 2, n level charging resistor Rn) a end (is first order pressure-control relay K3 by corresponding pressure-control relay respectively,, n stage pressure pilot relay K (n+2)) normally opened contact link to each other with the end of charging capacitor C2 and the end of bilateral diode D2; The other end of charging resistors at different levels links to each other with first port of input power supply respectively.
The other end of charging capacitor C2 links to each other with the U1 interface of alternating current torque motor M; The other end of bilateral diode D2 links to each other with the trigger end of bidirectional triode thyristor T1.
The link of bidirectional triode thyristor T1 links to each other with first port of input power supply, and another link links to each other with the U1 interface of alternating current torque motor M.
During specific implementation, the pressure of first order pressure regulating unit to the n stage pressure regulon correspondence can be provided with according to ascending order, as the corresponding deep low gear pressure of setting of first order pressure regulating unit ..., the corresponding the most high-grade pressure of setting of n stage pressure regulon.Perhaps, the pressure of first order pressure regulating unit to the n stage pressure regulon correspondence also can be provided with according to descending, as the corresponding the most high-grade pressure of setting of first order pressure regulating unit ..., the corresponding deep low gear pressure of setting of n stage pressure regulon.
With the situation according to the ascending order setting is example, at this moment, and the resistance of first order charging resistor R1, the resistance minimum of n level charging resistor Rn.Because the charging resistor resistance is big more, the charging of charging capacitor C2 is slow more, and the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is long more, and correspondingly, the input voltage effective value that alternating current torque motor M is obtained is more little, thereby exports less moment.In like manner, the charging resistor resistance is more little, and the charging of charging capacitor C2 is fast more, and the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is short more, and correspondingly, the input voltage effective value that alternating current torque motor M is obtained is big more, thus the bigger moment of output.
When selecting first order pressure that switch S 3 is set, compressing power is set to first value, the minimum of this value for setting in the present embodiment, press the first motion control switch S 1 this moment, under the control of CPU 11, first order pressure-control relay K3 adhesive, not adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by first order charging resistor R1, because the resistance maximum of first order charging resistor R1, therefore the charging of charging capacitor C2 is the slowest, the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is the longest, the input voltage effective value minimum that alternating current torque motor M obtains, alternating current torque motor M moves upward and exports minimum moment, makes compression device obtain minimum compressing power; When pressing the second motion control switch S 2, under the control of CPU 11, first order pressure-control relay K3 adhesive, also adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by first order charging resistor R1, same because the resistance maximum of first order charging resistor R1, therefore the charging of charging capacitor C2 is the slowest, the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is the longest, the input voltage effective value minimum that alternating current torque motor M obtains, alternating current torque motor M moves downward and exports minimum moment, makes compression device obtain minimum compressing power.
When selecting the i stage pressure that switch S (i+2) is set, compressing power is set to the i value, wherein, i-1 value＜i value＜i+1 value, press the first motion control switch S 1 this moment, under the control of CPU 11, i stage pressure pilot relay K (i+2) adhesive, not adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by i level charging resistor Ri, because the resistance of the resistance value ratio i-1 level charging resistor R (i-1) of i level charging resistor Ri is little, therefore the charge ratio i-1 stage pressure regulon of charging capacitor C2 is fast, the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is than the weak point of i-1 stage pressure regulon, the input voltage effective value that alternating current torque motor M obtains is bigger than i-1 stage pressure regulon, alternating current torque motor M moves upward and exports than the big moment of i-1 stage pressure regulon, makes compression device obtain bigger compressing power; When pressing the second motion control switch S 2, under the control of CPU 11, i stage pressure pilot relay K (i+2) adhesive, also adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by i level charging resistor Ri, it is same because the resistance of the resistance value ratio i-1 level charging resistor R (i-1) of i level charging resistor Ri is little, therefore the charge ratio i-1 stage pressure regulon of charging capacitor C2 is fast, the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is than the weak point of i-1 stage pressure regulon, the input voltage effective value that alternating current torque motor M obtains is bigger than i-1 stage pressure regulon, alternating current torque motor M moves downward and exports than the big moment of i-1 stage pressure regulon, makes compression device obtain bigger compressing power.Wherein, 1＜i≤n, and i is an integer.
When i=n, when promptly selecting the n stage pressure that switch S (n+2) is set, compressing this moment power promptly is set to the n value, the mxm. of this value for setting in the present embodiment, press the first motion control switch S 1 this moment, under the control of CPU 11, n stage pressure pilot relay K (n+2) adhesive, not adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by n level charging resistor Rn, because the resistance minimum of n level charging resistor Rn, therefore the charging of charging capacitor C2 is the fastest, and the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is the shortest, the input voltage effective value maximum that alternating current torque motor M obtains, the moment that alternating current torque motor M moves upward and exports makes compression device obtain maximum compressing power; When pressing the second motion control switch S 2, under the control of CPU 11, n stage pressure pilot relay K (n+2) adhesive, also adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by n level charging resistor Rn, same because the resistance minimum of n level charging resistor Rn, therefore the charging of charging capacitor C2 is the fastest, the ON time of bilateral diode D2 and bidirectional triode thyristor T1 is the shortest, the input voltage effective value maximum that alternating current torque motor M obtains, alternating current torque motor M moves downward and exports maximum moment, makes compression device obtain maximum compressing power.
Further, the pressure control circuit in the present embodiment can also comprise: pressure transducer RB1 and pressure amplifier A.Wherein, the input end of pressure amplifier A links to each other with the output terminal of pressure transducer RB1, and the output terminal of pressure amplifier A links to each other with CPU 11.Pressure transducer RB1 is used to measure the pressure of compression device, after amplifying by amplifier A, the pressure of measuring exports to CPU 11, CPU 11 is used to detect the size of described pressure, during greater than the pressure set, alternating current torque motor M is stopped at described pressure by disconnecting corresponding pressure-control relay.
In addition, if the output signal of pressure transducer RB1 is enough big, also can omit pressure amplifier A, that is, the output terminal of pressure transducer RB1 directly links to each other with CPU 11.
Fig. 3 is the structural representation of an a kind of example of compression device pressure control circuit among the utility model embodiment.As shown in Figure 3, be provided with the third gear output pressure in the present embodiment altogether.Promptly the operation capacitor C 1 of the CPU in comprising Fig. 1 11, the first motion control switch S 1, the second motion control switch S 2, direction pilot relay K2, alternating current torque motor M and alternating current torque motor M, also comprise: bidirectional triode thyristor T1, bilateral diode D2, charging capacitor C2, pressure transducer RB1, pressure amplifier A and three stage pressure regulons.
Wherein, first order pressure regulating unit comprises: first order pressure is provided with switch S 3, first order pressure-control relay K3 and first order charging resistor R1; Second level pressure regulating unit comprises: second level pressure is provided with switch S 4, second level pressure-control relay K4 and second level charging resistor R2; Third level pressure regulating unit comprises: third level pressure is provided with switch S 5, third level pressure-control relay K5 and third level charging resistor R3.
Wherein, an end of the first motion control switch S 1 and the second motion control switch S 2 links to each other other end ground connection respectively with CPU 11.The end of direction pilot relay K2 links to each other with CPU 11, other end ground connection.
The normally closed contact of the U2 interface direction of passage pilot relay K2 of alternating current torque motor M links to each other with second port of input power supply, and the normally opened contact of the Z2 interface direction of passage pilot relay K2 of alternating current torque motor M also links to each other with second port of input power supply.The U2 interface of alternating current torque motor M links to each other with the two ends of operation capacitor C 1 respectively with the Z2 interface.
First order pressure is provided with switch S 3, second level pressure is provided with switch S 4 and links to each other other end ground connection respectively with CPU 11 with the end that third level pressure is provided with switch S 5.
The end of first order pressure-control relay K3, second level pressure-control relay K4 and third level pressure-control relay K5 links to each other other end ground connection respectively with CPU 11.
The end of first order charging resistor R1 links to each other with first port of charging capacitor C2 and first port of bilateral diode D2 by first order pressure-control relay K3, and the other end links to each other with first port of input power supply; The end of second level charging resistor R2 links to each other with first port of charging capacitor C2 and first port of bilateral diode D2 by second level pressure-control relay K4, and the other end links to each other with first port of input power supply; The end of third level charging resistor R3 links to each other with first port of charging capacitor C2 and first port of bilateral diode D2 by third level pressure-control relay K5, and the other end links to each other with first port of input power supply.
Second port of charging capacitor C2 links to each other with the U1 interface of alternating current torque motor M; Second port of bilateral diode D2 links to each other with the trigger end of bidirectional triode thyristor T1.
The end of bidirectional triode thyristor T1 links to each other with first port of input power supply, and the other end links to each other with the U1 interface of alternating current torque motor M.
The input end of pressure amplifier A links to each other with the output terminal of pressure transducer RB1, and the output terminal of pressure amplifier A links to each other with CPU 11.
In the present embodiment, the pressure of compression device is according to the ascending order setting, at this moment, correspondingly, first order charging resistor R1＜second level charging resistor R2＜third level charging resistor R3.
Fig. 4 shows the ON time synoptic diagram of corresponding different charging resistor resistance bidirectional triode thyristor T1 in the present embodiment.As shown in Figure 4, when selecting first order pressure that switch S 3 is set, compressing power is set to first value, the minimum of this value for setting in the present embodiment, press the first motion control switch S 1 this moment, under the control of CPU 11, first order pressure-control relay K3 adhesive, not adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by first order charging resistor R1, because the resistance maximum of first order charging resistor R1, so the charging of charging capacitor C2 is the slowest, at t3, t6 constantly, the voltage of charging capacitor C2 reaches the threshold voltage of bilateral diode D2, bidirectional triode thyristor T1 conducting, the input voltage effective value minimum that this moment, alternating current torque motor M obtained, alternating current torque motor M moves upward and exports minimum moment, makes compression device obtain minimum compressing power; When pressing the second motion control switch S 2, under the control of CPU 11, first order pressure-control relay K3 adhesive, also adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by first order charging resistor R1, same because the resistance maximum of first order charging resistor R1, therefore the charging of charging capacitor C2 is the slowest, at t3, t6 constantly, the voltage of charging capacitor C2 reaches the threshold voltage of bilateral diode D2, bidirectional triode thyristor T1 conducting, the input voltage effective value minimum that alternating current torque motor M obtains, alternating current torque motor M moves downward and exports minimum moment, makes compression device obtain minimum compressing power.
When selecting second level pressure that switch S 4 is set, compressing power is set to second value, the intermediate value of this value for setting in the present embodiment, i.e. first value＜the second value＜the three value.Press the first motion control switch S 1 this moment, under the control of CPU 11, second level pressure-control relay K4 adhesive, not adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by second level charging resistor R2, because resistance value of mediating of second level charging resistor R2, therefore the duration of charging of charging capacitor C2 is medium, at t2, t5 constantly, the voltage of charging capacitor C2 reaches the threshold voltage of bilateral diode D2, bidirectional triode thyristor T1 conducting, and the input voltage effective value that this moment, alternating current torque motor M obtained is medium, alternating current torque motor M moves upward and exports medium moment, makes compression device obtain medium compressing power; When pressing the second motion control switch S 2, under the control of CPU 11, first order pressure-control relay K3 adhesive, also adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by second level charging resistor R2, it is same because the resistance of second level charging resistor R2 is an intermediate value, therefore the duration of charging of charging capacitor C2 is medium, at t2, t5 constantly, the voltage of charging capacitor C2 reaches the threshold voltage of bilateral diode D2, bidirectional triode thyristor T1 conducting, and the input voltage effective value that alternating current torque motor M obtains is medium, alternating current torque motor M moves downward and exports medium moment, makes compression device obtain medium compressing power.
When selecting third level pressure that switch S 5 is set, compressing power is set to the 3rd value, the mxm. of this value for setting in the present embodiment, press the first motion control switch S 1 this moment, under the control of CPU 11, third level pressure-control relay K5 adhesive, not adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by third level charging resistor R3, because the resistance minimum of third level charging resistor R3, therefore the charging of charging capacitor C2 is the fastest, at t1, in the t4 moment, the voltage of charging capacitor C2 reaches the threshold voltage of bilateral diode D2, bidirectional triode thyristor T1 conducting, the input voltage effective value maximum that this moment, alternating current torque motor M obtained, the moment that alternating current torque motor M moves upward and exports makes compression device obtain maximum compressing power; When pressing the second motion control switch S 2, under the control of CPU 11, third level pressure-control relay K5 adhesive, also adhesive of direction pilot relay K2, input voltage Uin is charging capacitor C2 charging by third level charging resistor R3, same because the resistance minimum of third level charging resistor R3, therefore the charging of charging capacitor C2 is the fastest, at t1, t4 constantly, the voltage of charging capacitor C2 reaches the threshold voltage of bilateral diode D2, bidirectional triode thyristor T1 conducting, the input voltage effective value maximum that alternating current torque motor M obtains, the moment that alternating current torque motor M moves downward and exports makes compression device obtain maximum compressing power.
Among the embodiment of the present utility model, X-ray machine comprises compression device, and comprises above-mentioned pressure control circuit.In X-ray machine, pressure control circuit is connected with compression device, and regulates the pressure of compression device.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. the pressure control circuit of a compression device comprises: logic control element (11) and alternating current torque motor (M),
It is characterized in that this circuit also comprises: bidirectional triode thyristor (T1), bilateral diode (D2), charging capacitor (C2), and two-stage pressure regulating unit at least, wherein,
Pressure regulating units at different levels include a pressure and switch, pressure-control relay and one are set to charging resistor that should rank pressure;
The end that each stage pressure is provided with switch links to each other other end ground connection with logic control element (11) respectively;
One end of pressure-control relaies at different levels links to each other with logic control element (11) respectively, other end ground connection;
One end of charging resistors at different levels links to each other with an end of charging capacitor (C2) and an end of bilateral diode (D2) by the normally opened contact of corresponding pressure-control relay respectively; The other end links to each other with first port of input power supply respectively;
The other end of charging capacitor (C2) links to each other with the U1 interface of alternating current torque motor (M);
The other end of bilateral diode (D2) links to each other with the trigger end of bidirectional triode thyristor (T1);
A link of bidirectional triode thyristor (T1) links to each other with first port of input power supply, and another link links to each other with the U1 interface of alternating current torque motor (M).
2. pressure control circuit according to claim 1 is characterized in that, the described pressure regulating unit of two-stage at least is: three stage pressure regulons.
3. pressure control circuit according to claim 1 and 2 is characterized in that, described pressure control circuit further comprises pressure transducer (RB1), and wherein, the output terminal of pressure transducer (RB1) links to each other with logic control element (11).
4. pressure control circuit according to claim 3, it is characterized in that, described pressure control circuit further comprises pressure amplifier (A), wherein, the input end of pressure amplifier (A) links to each other with the output terminal of pressure transducer (RB1), and the output terminal of pressure amplifier (A) links to each other with logic control element (11).
5. pressure control circuit according to claim 1 is characterized in that, described logic control element is CPU.
6. an X-ray machine comprises compression device, it is characterized in that, comprises that also described pressure control circuit is connected with described compression device as each described pressure control circuit in the claim 1 to 5, and controls the pressure of described compression device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120035048 CN201945894U (en) | 2011-01-27 | 2011-01-27 | Pressure control circuit of compressor and X-ray machine |
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| CN 201120035048 CN201945894U (en) | 2011-01-27 | 2011-01-27 | Pressure control circuit of compressor and X-ray machine |
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Cited By (3)
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| CN103767719A (en) * | 2013-12-27 | 2014-05-07 | 沈阳东软医疗系统有限公司 | Pressure motion protection method and device of breast X-ray machine and corresponding system |
| CN103970038A (en) * | 2013-02-05 | 2014-08-06 | 上海西门子医疗器械有限公司 | Compressor control circuit and medical device |
| CN104765299A (en) * | 2015-02-03 | 2015-07-08 | 浙江捷昌线性驱动科技股份有限公司 | Alternating current vibration motor amplitude control method and control circuit and massage bed |
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2011
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970038A (en) * | 2013-02-05 | 2014-08-06 | 上海西门子医疗器械有限公司 | Compressor control circuit and medical device |
| CN103970038B (en) * | 2013-02-05 | 2017-07-14 | 上海西门子医疗器械有限公司 | Compression device controls circuit and Medical Devices |
| CN103767719A (en) * | 2013-12-27 | 2014-05-07 | 沈阳东软医疗系统有限公司 | Pressure motion protection method and device of breast X-ray machine and corresponding system |
| CN103767719B (en) * | 2013-12-27 | 2016-01-27 | 沈阳东软医疗系统有限公司 | The compressing movement protection method of breast X-ray machine, device and correspondence system |
| CN104765299A (en) * | 2015-02-03 | 2015-07-08 | 浙江捷昌线性驱动科技股份有限公司 | Alternating current vibration motor amplitude control method and control circuit and massage bed |
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