CN113017666A - Anti-falling brake circuit of diagnostic bed and CT scanning bed - Google Patents
Anti-falling brake circuit of diagnostic bed and CT scanning bed Download PDFInfo
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- CN113017666A CN113017666A CN202110158216.0A CN202110158216A CN113017666A CN 113017666 A CN113017666 A CN 113017666A CN 202110158216 A CN202110158216 A CN 202110158216A CN 113017666 A CN113017666 A CN 113017666A
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- 238000002591 computed tomography Methods 0.000 title claims description 11
- 239000003990 capacitor Substances 0.000 claims abstract description 6
- 238000004146 energy storage Methods 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 abstract description 14
- 238000003745 diagnosis Methods 0.000 abstract description 11
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/037—Emission tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
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- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The invention belongs to the technical field of diagnosis bed braking, and particularly relates to an anti-falling braking circuit of a diagnosis bed, which comprises a live wire, a zero line, a driver, a band-type brake and a relay, wherein the driver is connected with the live wire and the zero line, the driver is in driving connection with a motor, a band-type brake signal end of the driver is connected with a first normally open contact of the relay through a triode, a first common end of the relay is connected with the band-type brake, and the first normally open contact of the relay corresponds to the first common end; the emergency stop signal end of the driver is connected with the second common end of the relay, the second normally open contact of the relay is grounded, and the second normally open contact of the relay corresponds to the second common end; the coil of the relay is connected in parallel with an energy storage capacitor, a voltage stabilizing tube and a rectifier bridge in sequence, and the alternating current input end of the rectifier bridge is connected with a live wire and a zero line. The anti-falling brake circuit of the diagnostic bed can prevent falling and overshoot caused by abnormal power failure of the diagnostic bed in the lifting process without adopting a speed reducer; and noise generated by the speed reducer is avoided.
Description
Technical Field
The invention belongs to the technical field of diagnosis bed braking, and particularly relates to an anti-falling braking circuit of a diagnosis bed and a CT scanning bed.
Background
The existing PET-CT/CT diagnostic bed can emit large noise when moving vertically, and the noise is emitted by a speed reducer between a screw rod and a driving motor. At present, the most direct way for reducing noise is to cancel a speed reducer, use a motor with large inertia and low rotating speed, and reduce the lifting time of the diagnostic bed while canceling the speed reducer so as to complete the lifting action more quickly. However, the following anti-falling brake circuit for the diagnostic bed and the CT scanning bed exist after the speed reducer is eliminated: when the system is suddenly powered off, the diagnostic bed obviously falls under the action of gravity. If the diagnosis bed is provided with the speed reducer, the diagnosis bed has no obvious dropping and overshoot phenomenon due to the buffering of the speed reducer under the condition of sudden power failure, but has larger noise.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a diagnostic bed anti-falling brake circuit and a CT scanning bed which satisfy one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a diagnosis bed anti-falling brake circuit comprises a live wire, a zero line, a driver, a band-type brake and a relay, wherein the driver is connected with the live wire and the zero line, the driver is in driving connection with a motor, a band-type brake signal end of the driver is connected with a first normally open contact of the relay through a triode, a first common end of the relay is connected with the band-type brake, and the first normally open contact of the relay corresponds to the first common end; the emergency stop signal end of the driver is connected with the second common end of the relay, the second normally open contact of the relay is grounded, and the second normally open contact of the relay corresponds to the second common end; the coil of the relay is connected in parallel with an energy storage capacitor, a voltage stabilizing tube and a rectifier bridge in sequence, and the alternating current input end of the rectifier bridge is connected with a live wire and a zero line.
Preferably, a first current-limiting resistor is arranged between the alternating current input end of the rectifier bridge and the live wire.
Preferably, a second current-limiting resistor is further arranged between the live wire input end of the rectifier bridge and the live wire.
Preferably, the rectifying negative output end of the rectifying bridge is connected to the coil of the relay through a third current limiting resistor.
Preferably, the rectification negative electrode output end of the rectifier bridge is connected to a coil of the relay through a light emitting diode.
Preferably, the band-type brake is connected with a freewheeling diode in parallel.
As a preferred scheme, the band-type brake is externally connected with a 24V switching power supply.
As a preferred scheme, the base electrode of the triode is connected with the contracting brake signal end of the driver, the emitting electrode of the triode is grounded, and the collecting electrode of the triode is connected with the first normally open contact of the relay.
Preferably, the relay is a dc coil relay.
The invention also provides a CT scanning bed, which comprises the anti-falling brake circuit of the diagnosis bed in any scheme.
Compared with the prior art, the invention has the beneficial effects that:
the anti-falling brake circuit of the diagnostic bed can prevent falling and overshoot caused by abnormal power failure of the diagnostic bed in the lifting process without adopting a speed reducer; and noise generated by the speed reducer is avoided.
Drawings
Fig. 1 is a structural diagram of a brake circuit of a conventional diagnostic bed without a speed reducer;
FIG. 2 is a block diagram of a diagnostic bed fall prevention brake circuit according to embodiment 1 of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
as shown in fig. 1, after a speed reducer is omitted, when a system is powered off, a live line L and a zero line N are powered off, a brake closing signal is triggered after residual charges of a driver are consumed, and residual charges of a 24V switching power supply exist, so that a brake cannot be immediately attracted until the residual charges of the driver are consumed or the residual charges of the switching power supply are consumed, and the diagnostic bed falls under the action of gravity in the time, and stops falling until the brake of a motor is attracted.
Therefore, the anti-falling brake circuit of the diagnostic bed is designed in the embodiment, and the falling and overshoot phenomena of the diagnostic bed are effectively prevented.
As shown in fig. 2, the anti-falling brake circuit of the diagnostic bed of the present embodiment includes the following components: the circuit comprises a live wire L, a zero wire N, a driver, a band-type brake, a relay K1, a triode Q1, a freewheeling diode D1, an energy storage capacitor C, a light emitting diode D2, a voltage regulator tube D3, a first current limiting resistor R1, a second current limiting resistor R2, a third current limiting resistor R3 and a rectifier bridge U1.
The connection relationship among the devices is as follows:
the driver is connected with the live wire L and the zero line N and is connected with the motor in a driving mode. The brake signal end of the driver is connected with a first normally open contact NO1 of a relay K1 through a triode Q1, specifically, the base electrode of the triode Q1 is connected with the brake signal end of the driver, the emitting electrode of the triode Q1 is grounded, and the collector electrode of the triode Q1 is connected with a first normally open contact NO1 of the relay; the first public end C1 of relay is connected with the band-type brake, and the external 24V switching power supply of band-type brake. A freewheeling diode D1 is connected in parallel to the band-type brake, and the anode of the freewheeling diode D1 is connected to the emergency stop signal terminal of the driver. When the live line L and the zero line N are powered off, the contact of the relay K1 is disconnected, the contracting brake immediately acts, and D1 is a freewheeling diode when the contracting brake is disconnected.
The emergency stop signal end of the driver is connected with the second common end C2 of the relay, and the second normally open contact NO2 of the relay is grounded and is used for inputting an emergency stop signal when the relay K1 is disconnected. The coil of the relay K1 is connected in parallel with an energy storage capacitor C, a voltage regulator tube D3 and a rectifier bridge U1 in sequence, and the alternating current input end of the rectifier bridge U1 is connected with a live wire L and a zero wire N. A second current-limiting resistor R2 and a first current-limiting resistor R1 are sequentially arranged between the alternating current input end of the rectifier bridge and the live wire L, and the rectifier cathode output end of the rectifier bridge is connected to the A2 end of the coil of the relay sequentially through a third current-limiting resistor R3 and a light-emitting diode D2; the rectified positive output terminal + of the rectifier bridge is connected to the terminal a1 of the coil of the relay. The voltage regulator tube D3 is also used as a freewheeling diode of the relay K1, and the light emitting diode D2 is used for indicating whether the voltages of the live wire L and the zero wire N are input or not; the energy storage capacitor C is used for storing energy, and normal work of the relay K1 is guaranteed when the positive and negative half cycles of the alternating current are switched.
The relay K1 of this embodiment is a direct current coil relay, and direct current coil relay action time is superior to alternating current relay and its small, is convenient for install on electric appliance cabinet or circuit board.
When the live line L and the zero line N are normal, the two pairs of contacts of the relay K1 are attracted, and the driver can control the brake action through the brake signal; moreover, the driver emergency stop signal is normally 0V, and at the moment, the driver can control the brake action through the brake signal;
when the live wire L and the zero wire N are abnormally powered off, the two ends of the coil of the relay K1 lose power, the two pairs of contacts of the relay K1 are both disconnected, the contracting brake loses power at the moment, the contracting brake immediately attracts and brakes, meanwhile, the emergency stop signal is disconnected, the driver utilizes the residual charges to brake simultaneously, the diagnostic bed is prevented from falling, and the problem that the diagnostic bed falls (namely, power-off sliding) is effectively solved. In addition, a speed reducer is not needed, and the falling and overshoot caused by abnormal power failure of the diagnostic bed in the lifting process can be prevented; and noise generated by the speed reducer is avoided.
The embodiment also provides a CT scanning bed, which comprises the diagnosis bed anti-falling brake circuit of the embodiment, and the safety of the CT scanning bed is improved.
Example 2:
the diagnostic bed anti-falling brake circuit of the embodiment is different from the diagnostic bed anti-falling brake circuit of the embodiment 1 in that:
one or more of the first current limiting resistor, the second current limiting resistor, the third current limiting resistor and the light emitting diode can be omitted, so that the circuit structure is simplified, and the requirements of different applications are met.
Other circuit configurations can refer to embodiment 1.
The CT scanning bed of the embodiment comprises the diagnosis bed anti-falling braking circuit of the embodiment.
Example 3:
the diagnostic bed anti-falling brake circuit of the embodiment is different from the diagnostic bed anti-falling brake circuit of the embodiment 1 in that:
the quantity of the current-limiting resistor that sets up between the alternating current input end of rectifier bridge and live wire L is also not limited to two, and can also be more, specifically sets up according to the application demand, satisfies the demand of different applications. In addition, the relay can also select an alternating current relay.
Other circuit configurations can refer to embodiment 1.
The CT scanning bed of the embodiment comprises the diagnosis bed anti-falling braking circuit of the embodiment.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. The anti-falling brake circuit of the diagnostic bed is characterized by comprising a live wire, a zero line, a driver, a brake and a relay, wherein the driver is connected with the live wire and the zero line, the driver is connected with a motor in a driving way, a brake signal end of the driver is connected with a first normally open contact of the relay through a triode, a first common end of the relay is connected with the brake, and the first normally open contact of the relay corresponds to the first common end; the emergency stop signal end of the driver is connected with the second common end of the relay, the second normally open contact of the relay is grounded, and the second normally open contact of the relay corresponds to the second common end; the coil of the relay is connected in parallel with an energy storage capacitor, a voltage stabilizing tube and a rectifier bridge in sequence, and the alternating current input end of the rectifier bridge is connected with a live wire and a zero line.
2. The anti-falling brake circuit of the diagnostic bed as claimed in claim 1, wherein a first current limiting resistor is arranged between the AC input end of the rectifier bridge and the live wire.
3. The anti-falling brake circuit of the diagnostic bed as claimed in claim 2, wherein a second current limiting resistor is further provided between the live input terminal of the rectifier bridge and the live line.
4. The anti-falling brake circuit of the diagnostic bed as claimed in claim 3, wherein the rectified negative output terminal of the rectifier bridge is connected to the coil of the relay through a third current limiting resistor.
5. The diagnostic bed anti-falling brake circuit as claimed in claim 4, wherein the rectified negative output terminal of the rectifier bridge is further connected to the coil of the relay through a light emitting diode.
6. The diagnostic bed anti-falling brake circuit as claimed in claim 1, wherein a freewheeling diode is connected in parallel to the brake.
7. The anti-falling brake circuit of the diagnostic bed as claimed in claim 1, wherein the brake is externally connected with a 24V switch power supply.
8. The anti-falling brake circuit of the diagnostic bed as claimed in claim 1, wherein the base of the triode is connected with the brake signal terminal of the driver, the emitter of the triode is grounded, and the collector of the triode is connected with the first normally open contact of the relay.
9. The diagnostic bed fall arrest braking circuit according to claim 1, wherein the relay is a dc coil relay.
10. A CT scanning bed comprising the diagnostic bed fall arrest braking circuit of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158216.0A CN113017666A (en) | 2021-02-05 | 2021-02-05 | Anti-falling brake circuit of diagnostic bed and CT scanning bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158216.0A CN113017666A (en) | 2021-02-05 | 2021-02-05 | Anti-falling brake circuit of diagnostic bed and CT scanning bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113017666A true CN113017666A (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110158216.0A Pending CN113017666A (en) | 2021-02-05 | 2021-02-05 | Anti-falling brake circuit of diagnostic bed and CT scanning bed |
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| CN (1) | CN113017666A (en) |
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2021
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| CN201825664U (en) * | 2010-09-27 | 2011-05-11 | 宝山钢铁股份有限公司 | Hook-slipping preventive braking control circuit of crane adopting stator pressure and speed regulating system |
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Application publication date: 20210625 |