CN101800821A - Medical communication calling equipment - Google Patents
Medical communication calling equipment Download PDFInfo
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- CN101800821A CN101800821A CN201010119403A CN201010119403A CN101800821A CN 101800821 A CN101800821 A CN 101800821A CN 201010119403 A CN201010119403 A CN 201010119403A CN 201010119403 A CN201010119403 A CN 201010119403A CN 101800821 A CN101800821 A CN 101800821A
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Abstract
The invention relates to medical communication calling equipment, which comprises a mainframe and a plurality of identical extensions. The extensions and the host are connected through two-wire buses. The medical communication calling equipment is characterized in that a mainframe CPU and an output control circuit are arranged in the mainframe, the mainframe CPU outputs data signals, the data signals are converted into two groups of positive level signals and negative level signals with completely opposite polarities through the output control circuit, and the mainframe CPU is then connected with the two-wire buses; the extensions are provided with a positive voltage detection circuit and a negative voltage detection circuit, the inputs of the positive voltage detection circuits and the negative voltage detection circuits are connected with one end of the two-wire buses, and data signals are output after detection of received positive level signals and negative level signals. The invention adopts the method of converting the data signals of the mainframe into two groups of positive level signals and negative level signals with completely opposite polarities, the power supply of the extensions is reliable, the data transmission distance is long, and the transmission rate is high. Therefore, the invention can be widely applied in the communication call of the hospital ward and the queuing calling system of the hospital.
Description
Technical field
The present invention relates to a kind of two-wire system bus medical communication calling equipment, specifically be applied to communication calling system and hospital's Zero queuing system between hospital ward patient and nurse.
Background technology
Traditional two-wire system bus medical communication calling equipment circuit block diagram as shown in Figure 1, main frame and each extension set are two heart yearns networkings, are output as A, B two ends, wherein the B end is earth terminal, the A end signal is as shown in Figure 2.The main frame signaling is just to send data by A end level, and one of its deficiency is when main frame sends data by two heart yearns, is high-low level on the line, and this moment is to extension set power supply difficulty; Two of deficiency is that the high-low level transmission rate is low.
The patent No. be ZL200720024467.5 patent disclosure a kind of " outpatient service of two-wire system bus intelligence system for distribution of out-patient department ", comprise extension set and main frame, connect by bus between extension set and the main frame, speaking circuit and control circuit are set in the extension set, the major technique characteristics are to be provided with in the extension set the high resistance circuit of interchange, described bus adopts two-wire system, the input that exchanges high resistance circuit connects the two-wire system bus, output connects the power end of speaking circuit and control circuit, the output of control circuit connects the control end of speaking circuit, and the output of speaking circuit connects the two-wire system bus.Exchanging high resistance circuit makes the two-wire system bus be in high impedance, the subsequent conditioning circuit that exchanges the output connection of high resistance circuit is in Low ESR, transmission signals just can not decayed, can send signal to extension set smoothly, the power supply of each extension set both can be provided, can realize the signal transmission between extension set and the main frame again.
The patent No. be ZL200720024466.0 patent disclosure a kind of " outpatient service intelligence system for distribution of out-patient department ", comprise extension set and main frame, connect by bus between extension set and the main frame, Audio Processing, order transtation mission circuit and audio frequency transtation mission circuit are set in the main frame, the major technique characteristics are: the bus output circuit is set, the output connecting bus of bus output circuit, described bus output circuit adopt three end adjustable voltage-regulating ic devices and peripheral circuit to form.The bus output circuit will be sent to each extension set by the two-wire system bus from the conversion of signals of order transtation mission circuit and audio frequency transtation mission circuit.
More than two patents all adopted the two-wire system bus, wiring is few, and is easy for installation, is easy to control, adopts high-low level to transmit data to have extension set power supply difficulty and the low problem of high-low level transmission rate but fail to solve.
Summary of the invention
The technical problem to be solved in the present invention is: overcome prior art and adopt high-low level transmission data to have extension set power supply difficulty and the low defective of high-low level transmission rate, provide a kind of extension set power supply reliable, bus transfer distance, the two-wire system bus medical communication calling equipment that transmission rate is high.
The technical solution adopted for the present invention to solve the technical problems is: a kind of medical communication calling equipment, comprise main frame and a plurality of identical extension sets, be connected by the two-wire system bus between extension set and the main frame, it is characterized in that: main frame inside is provided with host CPU and output control circuit, the host CPU outputting data signals connects with the two-wire system bus after output control circuit is converted to two groups of antipodal positive and negative level signals of polarity again; Extension set is provided with the generating positive and negative voltage testing circuit, and its input connects with an end of two-wire system bus, and the positive and negative level signal that receives is detected the back outputting data signals.
Wherein preferred version is:
Power operational amplifier that described main frame output control circuit oppositely is provided with by a preposition NPN type triode and two or audio frequency power amplifier and peripheral resistance are formed.
The generating positive and negative voltage testing circuit of described extension set is made up of a NPN type triode and base resistance and collector resistance, and the base stage of triode is input, grounded emitter, and current collection is very exported.
The present invention has following advantage compared with the prior art:
1, the present invention is because the main frame output control circuit has been adopted in design, the host CPU outputting data signals is converted to the positive negative output transmission means of transmitting behind two groups of antipodal positive and negative level transmissions signals of polarity, two-wire system bus A, B two outputs all are dynamic, be that the A end is output as timing, the B end is output as negative; The A end is output as when bearing, and the B end just is output as.During the main frame signaling, extension set all can obtain the energy by rectification to be provided like this, and the extension set power supply is reliable.
2, the data transfer mode of the positive negative output of the present invention's employing has long transmission distance, the advantage that transmission rate is high.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the two-wire system bus medical communication calling equipment of prior art.
Fig. 2 is the high-low level data signal waveforms schematic diagram of prior art.
Fig. 3 is the schematic block circuit diagram of the embodiment of the invention.
Fig. 4 is a positive and negative level transmissions signal waveform schematic diagram of the present invention.
Fig. 5 is host CPU data output of the present invention and extension set cpu data waveform input signal schematic diagram
Fig. 6 is the circuit theory diagrams of the embodiment of the invention.
Wherein: R1, R2, R3, R4, R5, R6, R7, R8, R9, R10: resistance, B1, B2: triode, F1, F2: power operational amplifier, CPU: central processing unit, A, B: two-wire system bus.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
With reference to Fig. 1, the two-wire system bus medical communication calling equipment of prior art, comprise main frame and a plurality of identical extension sets, be connected by the two-wire system bus between extension set and the main frame, main frame inside is provided with host CPU and output control circuit, the output of host CPU is connected with the input of output control circuit, and the A end of the output of output control circuit and two-wire system bus is connected, and the B end of two-wire system bus is connected with the earth terminal of main frame.Waveform as shown in Figure 2 with respect to ground end (0 level) for two-wire system bus A end signal.The main frame signaling is just to send data by A end level, and one of its deficiency is when main frame sends data by two heart yearns, is high level, low level conversion on the line, causes to extension set power supply difficulty and unstable; Two of deficiency is that the high-low level transmission rate is low.Usually, be provided with other circuit such as polarity switching, voltage stabilizing circuit, voltage detecting circuit, extension set CPU and demonstration speaking circuit in the inside of extension set, wherein, polarity switching adopts diode rectifier bridge, the input of rectifier bridge connects the two-wire system bus, effect is to convert the signal of polarity not on the two-wire system bus to fixing both positive and negative polarity signal; Voltage detecting circuit in the extension set adopts high low-voltage detection circuit, its input connects with the output plus terminal of diode rectifier bridge, output connects with extension set CPU, main frame sends the high-low level data by the two-wire system bus, realize the signal transmission between extension set and the main frame on the one hand, export the voltage stabilizing circuit that is connected by the diode rectifier bridge of polarity switching with it on the other hand, be embodied as the circuit supply of extension set: the output plus terminal of diode rectifier bridge is exported the extension set power supply after the voltage stabilizing circuit voltage stabilizing, respectively with extension set CPU, voltage detecting circuit, show that conversation waits circuit to connect, the output negative terminal of diode rectifier bridge is as the common of extension set power supply, respectively with high low-voltage detection circuit, extension set CPU, show that conversation waits circuit to connect.
Schematic block circuit diagram with reference to Fig. 3 embodiment of the invention, comprise main frame and a plurality of identical extension sets, main frame inside is provided with host CPU and main frame output control circuit, the output of host CPU is connected with the input of main frame output control circuit, and the output of main frame output control circuit is connected with A, the B end of two-wire system bus respectively.The waveform of host CPU outputting data signals as shown in Figure 5, be converted to two groups of antipodal positive and negative level signals of polarity through output control circuit again, be sent to extension set by the two-wire system bus then, the positive and negative level signal waveform that two-wire system bus A, B end transmits is respectively as the V among Fig. 4
A, V
BShown in.Extension set inside is provided with other circuit such as polarity switching, voltage stabilizing circuit, generating positive and negative voltage testing circuit, extension set CPU and demonstration conversation, polarity switching adopts diode rectifier bridge, the input of rectifier bridge connects the two-wire system bus, the output plus terminal of diode rectifier bridge is exported the extension set supply power voltage after the voltage stabilizing circuit voltage stabilizing, be connected with circuit such as generating positive and negative voltage testing circuit, extension set CPU, demonstration conversations respectively, the output negative terminal of diode rectifier bridge is connected with circuit such as generating positive and negative voltage testing circuit, extension set CPU, demonstrations respectively as the common of extension set power supply.Extension set adopts the generating positive and negative voltage testing circuit, its input connects with an end of two-wire system bus, detect the input of data-signal to extension set CPU after the positive and negative level signal that receives detected, the data-signal after extension set CPU will handle exports other circuit such as showing speaking circuit to.
Circuit theory diagrams with reference to Fig. 6 embodiment of the invention, main frame adopts positive and negative 15V power supply, host CPU data output signal waveform is the 5V pulse signal as shown in Figure 5, and power operational amplifier that the main frame output control circuit oppositely is provided with by a preposition triode of NPN type and two or audio-frequency power amplifier and peripheral resistance are formed: the main frame output control circuit adopts high-power amplifier or audio-frequency power amplifier F1, F2 as output respectively; The positive 15V of main frame provides positive voltage for the F1 positive input terminal after by resistance R 5, R6 dividing potential drop, and the input negative terminal of F1 connects positive 15V power supply through resistance R 2 on the one hand, is connected to the collector electrode of triode B1 on the other hand through resistance R 4, also is connected with the output of F1 through resistance R 3 simultaneously; The base stage of triode B1 is received the data output end of host CPU by resistance R 1, and the grounded emitter of triode B1 guarantees the A end output positive voltage of two-wire system bus when triode B1 saturation conduction, triode B1 by the time A end export negative voltage.
The positive input terminal ground connection of high-power amplifier F2, negative input end is connected to output by resistance R 8, negative input end is connected to the F1 output by resistance R 7 simultaneously, make F2 become a sign-changing amplifier, make it to guarantee that the output of F2 equates with the output amplitude of F1, direction is opposite, promptly be output as timing B end for negative when A end, otherwise the A end is output as when negative the B end for just; Two-wire system bus A, B end signal V
A, V
BWaveform is two groups of antipodal positive and negative level signals of polarity as shown in Figure 4.
The preferred resistance value of resistance R 2, R3, R4, R5, R6, R7, R8 is respectively 12K, 30K, 10K, 10K, 10K, 10K, 10K in the present embodiment.
At end of extension, the generating positive and negative voltage testing circuit of extension set is made up of a NPN type triode B2 and base resistance R9 and collector resistance R10, and the base stage of triode B2 is input, and the emitter extension is with reference to ground, and current collection is very exported.
Consistent for guaranteeing extension set voltage detecting circuit institute detecting signal waveform polarity with the host CPU data output signal, with one of them B end of two-wire system bus is the input D end of extension set bridge rectifier is received triode B2 in the generating positive and negative voltage testing circuit by resistance R 9 base stage, the collector electrode output of triode B2 is connected to extension set cpu data input, through pull-up resistor R10 extension 5V power supply, the emitter of triode B2 directly is connected with extension set ground end simultaneously.Working as host A end signal level like this is negative for timing B end, the D end that also is extension set is for negative, triode B2 ends, its collector electrode output high level, when being output as negative B end, the host A end is output as timing, triode B2 output low level, thus realized that the data input signal waveform of detecting signal that is extension set CPU is as shown in Figure 5 to the detecting of two-wire system bus A, B data-signal in the positive and negative level signal that end transmits.
The course of work of two-wire system bus medical communication calling equipment of the present invention is as follows:
The high level 5V of host CPU output, low level 0V digital signal, its data signal waveforms is as shown in Figure 5.This signal is added to the base stage of triode B1 by resistance R 1, control its saturation conduction and end, the output terminals A that the circuit of forming by resistance R 2, R3, R4 during saturation conduction is controlled high-power amplifier F1 is a positive voltage, otherwise, controlling its output terminals A when ending is negative voltage, V among its A terminal voltage waveform such as Fig. 4
AShown in.The A of amplifier F1 holds the negative input end that is connected to another high-power amplifier F2 by resistance R 7, and when the A end was high voltage, the output B end of F2 was output as low-voltage; When the A end was low-voltage, the B end was output as high voltage, as V among Fig. 4
BShown in the waveform, thereby the high-low level data-signal of CPU being exported by two output control circuits has converted the positive and negative level transmissions signal of two-wire system bus A, B end to.
At end of extension, by the bridge rectifier of polarity switching, no matter the A end is held to just for just still B, and the output C point of rectification is high level always.So no matter during the main frame signaling or during the standby, rectification output C point can obtain high level, has guaranteed the power supply of extension set voltage stabilizing circuit.
When the A end was high level, the B end was low level, and just the D of extension set end also is a low level, and triode B2 ends, and the CPU of extension set is input as high level.Be timing when A holds to negative B holds, triode B2 saturation conduction, the CPU input of extension set are low level, and the waveform that obtains is just in time identical with the waveform that host CPU is exported, as shown in Figure 5.
The input data signal of the outputting data signals of host CPU and extension set CPU is identical like this, realized smoothly data-signal by the two-wire system bus transmission and detect.
Among the present invention, host CPU, extension set CPU are mainly used in control and generate and receive processing communication data signal, adopt conventional chip product and respective peripheral circuit thereof to realize, main frame power operational amplifier that output control circuit uses or audio frequency power amplifier also can adopt commercial elements, other circuit such as set diode rectification bridge circuit, voltage stabilizing circuit, demonstration speaking circuit are the common function circuit of existing medical communication calling equipment in the extension set, its mutual circuit connects also to be grasped by this field those of ordinary skill, does not repeat them here as prior art.
In the design of the present invention, owing to adopted main frame to send the signal transmission form of two groups of antipodal positive and negative level signals of polarity by the two-wire system bus, no matter the negative still positive A of B of the positive B of main frame output A is negative, the voltage stabilizing circuit of extension set can both guarantee enough high voltages, thereby has guaranteed the power supply of extension set; Secondly, main frame uses positive negative level output transmission rate height, long transmission distance, and also the main frame output control circuit uses high-power amplifier or audio frequency power amplifier, the load capacity of main frame is strengthened, thereby can be widely used in hospital ward communication calling and hospital's Zero queuing system.
Claims (3)
1. medical communication calling equipment, comprise main frame and a plurality of identical extension sets, be connected by the two-wire system bus between extension set and the main frame, it is characterized in that: main frame inside is provided with host CPU and output control circuit, the host CPU outputting data signals connects with the two-wire system bus after output control circuit is converted to two groups of antipodal positive and negative level signals of polarity again; Extension set is provided with the generating positive and negative voltage testing circuit, and its input connects with an end of two-wire system bus, and the positive and negative level signal that receives is detected the back outputting data signals.
2. medical communication calling equipment according to claim 1 is characterized in that, power operational amplifier that described main frame output control circuit oppositely is provided with by a preposition NPN type triode and two or audio frequency power amplifier and peripheral resistance are formed.
3. medical communication calling equipment according to claim 1, it is characterized in that the generating positive and negative voltage testing circuit of described extension set is made up of a NPN type triode and base resistance and collector resistance, the base stage of triode is input, grounded emitter, current collection is very exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010119403A CN101800821A (en) | 2010-01-23 | 2010-01-23 | Medical communication calling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010119403A CN101800821A (en) | 2010-01-23 | 2010-01-23 | Medical communication calling equipment |
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| CN101800821A true CN101800821A (en) | 2010-08-11 |
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| CN201010119403A Pending CN101800821A (en) | 2010-01-23 | 2010-01-23 | Medical communication calling equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103209270A (en) * | 2013-03-14 | 2013-07-17 | 山东亚华电子有限公司 | Mainframe of medical communication calling device |
| CN103986983A (en) * | 2014-05-30 | 2014-08-13 | 北京鑫丰南格科技有限责任公司 | Reinforcement calling method and system |
| CN109815185A (en) * | 2018-12-13 | 2019-05-28 | 山东亚华电子股份有限公司 | A kind of host for realizing two-wire system bus |
| CN112333068A (en) * | 2020-10-30 | 2021-02-05 | 天基电气（深圳）有限公司 | Power supply communication bus system, power supply communication method and electronic equipment |
| CN113131458A (en) * | 2021-04-25 | 2021-07-16 | 深圳市英锐恩科技有限公司 | Output control circuit and method of master-slave machine system |
-
2010
- 2010-01-23 CN CN201010119403A patent/CN101800821A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103209270A (en) * | 2013-03-14 | 2013-07-17 | 山东亚华电子有限公司 | Mainframe of medical communication calling device |
| CN103986983A (en) * | 2014-05-30 | 2014-08-13 | 北京鑫丰南格科技有限责任公司 | Reinforcement calling method and system |
| CN103986983B (en) * | 2014-05-30 | 2017-12-29 | 北京鑫丰南格科技有限责任公司 | Reinforce method of calling and system |
| CN109815185A (en) * | 2018-12-13 | 2019-05-28 | 山东亚华电子股份有限公司 | A kind of host for realizing two-wire system bus |
| CN109815185B (en) * | 2018-12-13 | 2022-03-15 | 山东亚华电子股份有限公司 | Host for realizing two-wire system bus |
| CN112333068A (en) * | 2020-10-30 | 2021-02-05 | 天基电气（深圳）有限公司 | Power supply communication bus system, power supply communication method and electronic equipment |
| CN112333068B (en) * | 2020-10-30 | 2021-11-19 | 天基电气（深圳）有限公司 | Power supply communication bus system, power supply communication method and electronic equipment |
| CN113131458A (en) * | 2021-04-25 | 2021-07-16 | 深圳市英锐恩科技有限公司 | Output control circuit and method of master-slave machine system |
| CN113131458B (en) * | 2021-04-25 | 2024-03-01 | 深圳市英锐恩科技有限公司 | Output control circuit and method of master-slave system |
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Application publication date: 20100811 |