CN104330989A - Control circuit for comprehensive diagnosis and treatment table - Google Patents
Control circuit for comprehensive diagnosis and treatment table Download PDFInfo
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- CN104330989A CN104330989A CN201410536812.8A CN201410536812A CN104330989A CN 104330989 A CN104330989 A CN 104330989A CN 201410536812 A CN201410536812 A CN 201410536812A CN 104330989 A CN104330989 A CN 104330989A
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- circuit
- control circuit
- operational amplifier
- resistance
- triode
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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Abstract
The invention relates to a control circuit for a comprehensive diagnosis and treatment table, comprising an optical coupling isolation circuit, an analog processing circuit, a main control circuit and an on-off control circuit. The output end of the optical coupling isolation circuit is connected with the input end of the main control circuit. The output end of the analog processing circuit is connected with the input end of the main control circuit. The output end of the main control circuit is connected with the input end of the on-off control circuit. In an analog signal processing circuit, an operational amplifier and a triode form a constant current source so as to provide stable current for a platinum resistor. The optical coupling isolation circuit is used in a switching quantity input circuit, and functions such as optical isolation, protection and driving are achieved. A solid-state relay is adopted in the on-off control circuit, and the solid-state relay is a contactless electronic switch with an isolation function, thereby improving the service life of the circuit and reducing the power consumption. A current detection circuit is adopted to monitor the magnitude of current in real time, which improves the safety of the system.
Description
Technical field
The present invention relates to a kind of signal transacting and digital output modul circuit, be specifically related to a kind of control circuit for comprehensive diagnosis and treatment bench.
Background technology
Along with the development of science and technology, the comprehensive diagnosis and treatment bench of ear nose larynx is widely used in clinical system.At present, diagnosis and treatment bench, just as otorhinolaryngologic special clinic tool, along with the practice of constantly bringing forth new ideas of clinician, by being applied in the treatment work of other clinical sections gradually, brings great convenience to clinical treatment work.
Summary of the invention
The object of the invention is to solve the temperature detection related in comprehensive diagnosis and treatment bench, the several functions such as switching value and digital output modul, provide a kind of control circuit for comprehensive diagnosis and treatment bench.
For achieving the above object, design of the present invention is:
Temperature detection has been related to, the several functions such as the amount of opening the light detection and digital output modul in comprehensive diagnosis and treatment bench.Temperature detection adopts Pt100 platinum resistance, and the resistance value of Pt100 platinum resistance can change along with the change of temperature, therefore the stable constant current source of design one makes by the current constant of Pt100 constant.In order to improve the Electro Magnetic Compatibility of system, the input of switching value needs to adopt light-coupled isolation, in order to improve the serviceable life of on-off circuit and reduce the power consumption of system, adopts solid-state relay.In order to improve the security performance of system, use current detection circuit.
According to above design, the present invention adopts following technical scheme:
A kind of control circuit for comprehensive diagnosis and treatment bench, comprise optical coupling isolation circuit, analog quantity treatment circuit, governor circuit and ON-OFF control circuit, the output terminal of described optical coupling isolation circuit is connected with governor circuit input end, the described output terminal of analog quantity treatment circuit is connected with the input end of governor circuit, and the output terminal of described governor circuit is connected with the input end of ON-OFF control circuit.
Described analog quantity treatment circuit is made up of stabilivolt, stabilivolt current-limiting resistance, the first divider resistance, the second divider resistance, the first operational amplifier, the second operational amplifier, negative feedback resistor, the first triode, filter resistance, filter capacitor, the 3rd divider resistance, the 4th divider resistance; The anode of described stabilivolt is connected with power supply, and the negative terminal of stabilivolt is through stabilivolt current-limiting resistance ground connection; One end of described second divider resistance is connected with power supply, and the other end is connected to the negative terminal of stabilivolt through the first divider resistance; The normal phase input end of the first operational amplifier is connected with the first divider resistance, an inverting input of the first operational amplifier is connected with the transmitter of the first triode, another inverting input of first operational amplifier is through negative feedback resistor to power supply, and the output terminal of the first operational amplifier is connected with the base stage of the first triode; The collector of the first triode is connected with filter resistance; Filter resistance is capacity earth after filtering; The normal phase input end of the second operational amplifier is connected with filter resistance, an inverting input of the second operational amplifier is through the 3rd divider resistance ground connection, and another inverting input of the second operational amplifier is connected to the output terminal of the second operational amplifier through the 4th divider resistance.
Described optical coupling isolation circuit comprises a TLP281 chip and its peripheral circuit.
Described ON-OFF control circuit is made up of current-limiting resistance, biasing resistor, the second triode, solid-state relay, voltage dependent resistor (VDR), current detection circuit; Described current-limiting resistance one end is through biasing resistor ground connection; The base stage of the second triode is connected with one end of current-limiting resistance, and the collector of the second triode is connected with the negative control end of solid-state relay, the grounded emitter of the second triode; The positive control termination 24V power supply of solid-state relay, an output terminal of solid-state relay is connected with 200V+, and another output terminal of solid-state relay is connected with one end of voltage dependent resistor (VDR); One end of voltage dependent resistor (VDR) is connected with 200V-.
Described current detection circuit comprises an ACS712 chip and its peripheral circuit.
Compared with prior art, the present invention has following advantage:
One of the present invention is used for comprehensive diagnosis and treatment bench control circuit, utilizes light-coupled isolation On-off signal, enhances the Electro Magnetic Compatibility of system; The constant current source using amplifier cooperation triode to build, provides stable electric current to Pt100 platinum resistance, thus the precision of the temperature detection improved; Adopt solid-state relay, improve the serviceable life of on-off circuit, reduce the power consumption of system; Use voltage dependent resistor (VDR) and current detection circuit, improve the security of system.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the control circuit of comprehensive diagnosis and treatment bench of the present invention.
Fig. 2 is the schematic diagram of analog quantity treatment circuit.
Fig. 3 is the schematic diagram of TLP281 optical coupling isolation circuit.
Fig. 4 is the schematic diagram of ON-OFF control circuit.
Fig. 5 is the schematic diagram of current detection circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
As shown in Figure 1, a kind of control circuit for comprehensive diagnosis and treatment bench, comprise optical coupling isolation circuit, analog quantity treatment circuit, governor circuit and ON-OFF control circuit, the output terminal of described optical coupling isolation circuit is connected with governor circuit input end, the described output terminal of analog quantity treatment circuit is connected with the input end of governor circuit, and the output terminal of described governor circuit is connected with the input end of ON-OFF control circuit.
As shown in Figure 2, described analog quantity treatment circuit is made up of stabilivolt D1, stabilivolt current-limiting resistance R1, the first divider resistance R2, the second divider resistance R3, the first operational amplifier U1A, the second operational amplifier U1D, negative feedback resistor R4, the first triode T6, filter resistance R5, filter capacitor C1, the 3rd divider resistance R6, the 4th divider resistance R7; The anode of described stabilivolt D1 is connected with power supply, and the negative terminal of stabilivolt D1 is through stabilivolt current-limiting resistance R1 ground connection; One end of described second divider resistance R3 is connected with power supply, and the other end is connected to the negative terminal of stabilivolt D1 through the first divider resistance R2; The normal phase input end of the first operational amplifier U1A is connected with the first divider resistance R2, an inverting input of the first operational amplifier U1A is connected with the emitter of the first triode T6, another inverting input of first operational amplifier U1A is through negative feedback resistor R4 to power supply, and the output terminal of the first operational amplifier U1A is connected with the base stage of the first triode T6; The collector of the first triode T6 is connected with filter resistance R5; Filter resistance R5 is electric capacity C1 ground connection after filtering; The normal phase input end of the second operational amplifier U1D is connected with filter resistance R5, an inverting input of the second operational amplifier U1D is through the 3rd divider resistance R6 ground connection, and another inverting input of the second operational amplifier U1D is connected to the output terminal of the second operational amplifier U1D through the 4th divider resistance R7.
The in-phase input end of the first operational amplifier U1A obtains reference voltage signal from bleeder circuit, because the first operational amplifier U1A is operated in closed loop states, reference voltage is identical by negative feedback, the emitter voltage of the first triode T6 to be accurately fixedly, thus the emitter current of the first triode T6 is just fixed, thus collector current is also just controlled in constant state.
When emitter current is tending towards increasing due to any reason, first triode T6 emitter current potential can reduce, at this moment the first operational amplifier U1A anti-phase input terminal potential being connected to the first triode T6 emitter reduces too, the output voltage of the first operational amplifier U1A is raised, thus the base voltage of the first triode T6 is raised, make the first triode T6 be tending towards cut-off, this just inhibits the increase of emitter current, stabilizes output current.
Constant current signal is through Pt100 platinum resistance, ensure that the voltage Pt100_Sbt in Pt100 platinum resistance is linear with its resistance variations, at the filtering circuit through being made up of filter resistance R5 and filter capacitor C1, advantageously in calculating and the control of temperature.
As shown in Figure 3, in described optical coupling isolation circuit, light-coupled isolation adopts TLP281 chip, and between 1,2 pin, a shunt resistance in parallel, can prevent the dark bright generation misoperation of diode.
As shown in Figure 4, described ON-OFF control circuit is made up of current-limiting resistance R10, biasing resistor R11, the second triode T1, solid-state relay P1, voltage dependent resistor (VDR) ZNR6, current detection circuit; Described current-limiting resistance R10 one end is through biasing resistor R11 ground connection; The base stage of the second triode T1 is connected with one end of current-limiting resistance R10, and the collector of the second triode T1 is connected with the negative control end of solid-state relay P1, the grounded emitter of the second triode T1; The positive control termination 24V power supply of solid-state relay P1, an output terminal of solid-state relay P1 is connected with 200V+, and another output terminal of solid-state relay P1 is connected with one end of voltage dependent resistor (VDR) ZNR6; One end of voltage dependent resistor (VDR) ZNR6 is connected with 200V-.
As shown in Figure 5, in described current detection circuit, be made up of an ACS712 chip and its peripheral circuit.
Claims (5)
1. the control circuit for comprehensive diagnosis and treatment bench, it is characterized in that, comprise optical coupling isolation circuit, analog quantity treatment circuit, governor circuit and ON-OFF control circuit, the output terminal of described optical coupling isolation circuit is connected with governor circuit input end, the described output terminal of analog quantity treatment circuit is connected with the input end of governor circuit, and the output terminal of described governor circuit is connected with the input end of ON-OFF control circuit.
2. the control circuit of comprehensive diagnosis and treatment bench according to claim 1, it is characterized in that, described analog quantity treatment circuit is made up of stabilivolt (D1), stabilivolt current-limiting resistance (R1), the first divider resistance (R2), the second divider resistance (R3), the first operational amplifier (U1A), the second operational amplifier (U1D), negative feedback resistor (R4), the first triode (T6), filter resistance (R5), filter capacitor (C1), the 3rd divider resistance (R6), the 4th divider resistance (R7); The anode of described stabilivolt (D1) is connected with power supply, and the negative terminal of stabilivolt (D1) is through stabilivolt current-limiting resistance (R1) ground connection; One end of described second divider resistance (R3) is connected with power supply, and the other end is connected to the negative terminal of stabilivolt (D1) through the first divider resistance (R2); The normal phase input end of the first operational amplifier (U1A) is connected with the first divider resistance (R2), an inverting input of the first operational amplifier (U1A) is connected with the emitter of the first triode (T6), another inverting input of first operational amplifier (U1A) is through negative feedback resistor (R4) to power supply, and the output terminal of the first operational amplifier (U1A) is connected with the base stage of the first triode (T6); The collector of the first triode (T6) is connected with filter resistance (R5); Filter resistance (R5) is electric capacity (C1) ground connection after filtering; The normal phase input end of the second operational amplifier (U1D) is connected with filter resistance (R5), an inverting input of the second operational amplifier (U1D) is through the 3rd divider resistance (R6) ground connection, and another inverting input of the second operational amplifier (U1D) is connected to the output terminal of the second operational amplifier (U1D) through the 4th divider resistance (R7).
3. comprehensive diagnosis and treatment bench control circuit according to claim 1, is characterized in that, described optical coupling isolation circuit comprises a TLP281 chip and its peripheral circuit.
4. comprehensive diagnosis and treatment bench control circuit according to claim 1, it is characterized in that, described ON-OFF control circuit is made up of current-limiting resistance (R10), biasing resistor (R11), the second triode (T1), solid-state relay (P1), voltage dependent resistor (VDR) (ZNR6), current detection circuit; Described current-limiting resistance (R10) one end is through biasing resistor (R11) ground connection; The base stage of the second triode (T1) is connected with one end of current-limiting resistance (R10), and the collector of the second triode (T1) is connected with the negative control end of solid-state relay (P1), the grounded emitter of the second triode (T1); The positive control termination 24V power supply of solid-state relay (P1), an output terminal of solid-state relay (P1) is connected with 200V+, and another output terminal of solid-state relay (P1) is connected with one end of voltage dependent resistor (VDR) (ZNR6); One end of voltage dependent resistor (VDR) (ZNR6) is connected with 200V-.
5. comprehensive diagnosis and treatment bench control circuit according to claim 4, is characterized in that, described current detection circuit comprises an ACS712 chip and its peripheral circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410536812.8A CN104330989B (en) | 2014-10-13 | 2014-10-13 | A kind of control circuit for being used to integrate diagnosis and treatment bench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410536812.8A CN104330989B (en) | 2014-10-13 | 2014-10-13 | A kind of control circuit for being used to integrate diagnosis and treatment bench |
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| CN104330989A true CN104330989A (en) | 2015-02-04 |
| CN104330989B CN104330989B (en) | 2017-08-11 |
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| CN201410536812.8A Active CN104330989B (en) | 2014-10-13 | 2014-10-13 | A kind of control circuit for being used to integrate diagnosis and treatment bench |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387773A (en) * | 2018-04-24 | 2018-08-10 | 中国船舶重工集团公司第七二六研究所 | Voltage monitoring circuit |
| CN111572443A (en) * | 2020-04-26 | 2020-08-25 | 佛山职业技术学院 | Driving early warning system and method |
| CN114089149A (en) * | 2022-01-21 | 2022-02-25 | 成都明夷电子科技有限公司 | System and method for testing automatic power control function of optical communication laser driver |
| CN114397936A (en) * | 2021-12-30 | 2022-04-26 | 杭州春来科技有限公司 | Controllable constant-current source output circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2692689B1 (en) * | 1992-06-19 | 1996-12-20 | Gemplus Card Int | METHOD OF MEDICAL ASSISTANCE USING A MEASURING AND / OR THERAPY APPARATUS AND DEVICE FOR IMPLEMENTING THE METHOD. |
| CN2235279Y (en) * | 1995-06-22 | 1996-09-18 | 中国医学科学院生物医学工程研究所 | Computerized multi-channel automatical temp. control traditional Chinese medical acupuncture therapeutic instrument |
| CN2498990Y (en) * | 2001-10-16 | 2002-07-10 | 广州白云蓝天电子科技有限公司 | Self induction heater for throat mirror |
| CN201147406Y (en) * | 2007-12-12 | 2008-11-12 | 天津工程师范学院 | Hot liquid medicine filling machine |
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2014
- 2014-10-13 CN CN201410536812.8A patent/CN104330989B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387773A (en) * | 2018-04-24 | 2018-08-10 | 中国船舶重工集团公司第七二六研究所 | Voltage monitoring circuit |
| CN108387773B (en) * | 2018-04-24 | 2024-03-29 | 中国船舶重工集团公司第七二六研究所 | Voltage monitoring circuit |
| CN111572443A (en) * | 2020-04-26 | 2020-08-25 | 佛山职业技术学院 | Driving early warning system and method |
| CN114397936A (en) * | 2021-12-30 | 2022-04-26 | 杭州春来科技有限公司 | Controllable constant-current source output circuit |
| CN114089149A (en) * | 2022-01-21 | 2022-02-25 | 成都明夷电子科技有限公司 | System and method for testing automatic power control function of optical communication laser driver |
| CN114089149B (en) * | 2022-01-21 | 2022-04-01 | 成都明夷电子科技有限公司 | System and method for testing automatic power control function of optical communication laser driver |
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| CN104330989B (en) | 2017-08-11 |
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Effective date of registration: 20220322 Address after: Room 240, building 2, 1919 Fengxiang Road, Baoshan District, Shanghai 200444 Patentee after: Shanghai shaonao Sensor Technology Co.,Ltd. Address before: 200444 No. 99, upper road, Shanghai, Baoshan District Patentee before: Shanghai University |