CN2834572Y

CN2834572Y - Central monitoring system for transfusion

Info

Publication number: CN2834572Y
Application number: CNU2005200268045U
Authority: CN
Inventors: 刘化侠; 李建明
Original assignee: Tianjin Tellyes Scientific Co Ltd
Current assignee: Tianjin Tellyes Scientific Co Ltd
Priority date: 2005-07-27
Filing date: 2005-07-27
Publication date: 2006-11-08
Anticipated expiration: 2015-07-27

Abstract

The utility model relates to a central monitoring system for transfusion, which solves the problems of large size, high power consumption, poor precision, no visual man-machine interface, inconvenient data transmission, etc. of the existing system and comprises N extension machines and a main machine, wherein data is exchanged between the extension machines and the main machine through wireless communicating modules; each of the extension machines comprises a wireless microcontroller, a sensor, an amplifying circuit, an A/D change-over circuit, a wireless transmitting and receiving circuit, an input device and an alarm circuit; the main machine comprises a wireless microcontroller, a wireless transmitting and receiving circuit, an RS232 interface, an input device and an alarm circuit. Wireless receiving and transmitting modules are adopted to form a data transmission network, a GFSK is adopted for modulation and the noise immunizing capacity is strong. Multi-point communication is supported, and the data transmission rate is as high as 0.1 Mbps. The utility model has a specific carrier wave listening function, lowers the power consumption and effectively avoids data collision. When no barrier exists, the effective transmitting distance can reach more than 800 m, when barriers, such as buildings, etc., the transmitting distance can reach about 350 m. The utility model has the advantages of small size, light weight, simple structure, convenient operation and low power consumption.

Description

Central authorities' transfusion monitoring system

[technical field]: this is novel to relate to a kind of medical auxiliary apparatus, promptly monitors the electronic machine of transfusion situation in the hospital.

[background technology]: at present, similar instrument-infusion pump, syringe pump are arranged abroad, they are mainly used in particular patients ' such as heart disease, cardiovascular disease, and the price extra-high-speed, do not wait from several ten thousand yuan to tens0000 yuan.Domestic, once the someone developed similar instrument, and as 01 year " collecting and distributing type ward computer monitoring system ", position, medicine liquid droplet speed, the syringe needle that can monitor medicinal liquid automatically came off, syringe needle stops up function, but it involves great expense (9.5 ten thousand/platform).In a word, present like product prevailing price both domestic and external is higher, has to some extent that volume is big, power consumption is high, precision is not enough, man machine interface is directly perceived, transmission data inconvenience, and for weak points such as general patient are inapplicable.

[summary of the invention]: the purpose of this utility model is to solve the deficiencies in the prior art, and a kind of central transfusion monitoring system is provided, so that reduce cost, reduces power consumption, improves precision and interference rejection ability and message transmission rate.

This utility model central authorities transfusion monitoring system, comprise N extension set and an exchange, carry out exchanges data by wireless communication module between extension set and the exchange, wherein, extension set comprises a wireless microcontroller, the detection signal of pick off imports wireless microcontroller into through amplifying circuit, A/D change-over circuit respectively, and this microcontroller sends to exchange through the wireless transmit receiving circuit again, and this controller also connects input equipment and warning circuit respectively; Exchange comprises a wireless microcontroller equally, and this controller connects wireless transmit receiving circuit, RS232 interface, input equipment and warning circuit respectively.Exchange is connected with computer by the RS232 interface.

Advantage of the present utility model and effect thereof: (1) ingenious monitoring that utilizes gravity principle and relevant density knowledge the monitoring of volume to be converted into gravity, utilize cantilever beam sensor waiting that the gravity that records object is converted into ultra-weak electronic signal, through amplifying circuit this light current is amplified to A/D and to change, data after the conversion are given microcontroller, microcontroller is handled it, when measured value equaled warning value, microcontroller sent alarm signal.(2) contactless to the survey medicament, pollution-free, noiseless, but a speed of the surplus of continuous measurement medicinal liquid, medicinal liquid.(3) adopt radio receiving transmitting module to form data transmission network, adopt the GFSK modulation, interference rejection ability is strong; Support multi-point communication, message transmission rate is up to 0.1Mbps.Have distinctive carrier sense function, greatly reduce power consumption, avoid data collision effectively.Effectively transmitting range does not have when blocking and can reach more than the 800m, can reach about 350m when having building etc. to block.(4) extension set can be passed to data the exchange of nurse station easily, and exchange is given computer with data by the RS232 oral instructions, can make full use of the power and the friendly display interface of computer processing data, makes the nurse grasp the transfusion situation well in real time.(5) be applicable to the detection of multiple infusion bottle, the bottle formula, pocket type etc.(6) have sound and light alarm, report to the police accurately.(7) this system bulk is little, in light weight, and is simple in structure, easy to operate, low in energy consumption.

[description of drawings]:

The exchange circuit block diagram of Fig. 1, central transfusion monitoring system;

The extension set circuit block diagram of Fig. 2, monitoring system;

The schematic network structure of Fig. 3, whole monitoring system;

Fig. 4, extension set profile reference view;

Fig. 5, circuit theory reference diagram: Fig. 5-1 serial port circuit, Fig. 5-2 power supply and interface circuit, Fig. 5-3 key circuit, Fig. 5-4 amplifying circuit, Fig. 5-5 sensor circuit schematic diagram, Fig. 5-6 wireless transceiver circuit.

[specific embodiment]:

As Figure 1-3, this central authorities' transfusion monitoring system, comprise N extension set and an exchange, carry out exchanges data by wireless communication module between extension set and the exchange, wherein, extension set comprises a wireless microcontroller, and the detection signal of pick off imports wireless microcontroller into through amplifying circuit, A/D change-over circuit respectively, this microcontroller sends to exchange through the wireless transmit receiving circuit again, and this controller also connects press key input device and warning circuit respectively; Exchange comprises a wireless microcontroller equally, and this controller connects wireless transmit receiving circuit, RS232 interface, press key input device and warning circuit respectively.Exchange is connected with computer by the RS232 interface.

The operation principle of system is as follows: utilize the variation of gravity to monitor the raffinate scale of construction, can calculate the speed of dripping of liquid according to the variable quantity of liquid in the unit interval.

According to the object of uniform dielectric, the pass of its volume V and its quality m and density p is:

V=m/ ρ---(1) formula

Annotate: the medicine in using for treatment, the variation of its density is very little, generally at 0.95～1.06g/cm ³Between, therefore can proximately be considered as certain value (ρ=1.0g/cm to density ³).

According to Newton's law, the pass of the gravity G that object is suffered and the quality m of object is:

G=m*g---(2) formula

Annotate: g is the acceleration of gravity of Location, and general acceleration of gravity can be slightly different in different places, but its difference is no more than 5 ‰, and we get g=9.8m/s ²

Simultaneous (1) formula and (2) formula get the volume of object and the relation of weight:

V=G/ (g* ρ)--------------------------------------------(3) formula

By measurement, can draw the volume of remaining liq to weight.

Can calculate the flow velocity of liquid according to the liquid variable quantity in the unit interval.

V=(V1-V2)/Δ t-----------------------------------------(4) formula

Annotate: v is a speed in the formula, and V1 is a t1 volume constantly, and V2 is a t2 volume constantly, and Δ t is the time difference of t2 and t1.

Concrete schematic circuit is referring to Fig. 5.

(1) serial port circuit figure such as 5-1:

Circuit adopts SP3220 serial ports RS232 to drive chip, wherein 13 feet connect 2 feet with regard to interface Jin, and 8 feet connect 3 feet of Jin, and 9 feet connect 13 feet of J1,15 feet meet 3v power vd D, 14 foot ground connection, 2 feet and 4 feet connect the two ends of

capacitor C

1, and 5 feet and 6 feet connect the two ends of

capacitor C

2,3 feet connect an end of C3 end, the other end ground connection of C3,7 feet connect the end of C4, the other end ground connection of C4.

(2) power supply and interface circuit such as Fig. 5-2:

LM117 position power supply voltage stabilizing chip, VIN is input voltage+5V, VCC is output voltage 3.3V.C201, C202C203, C204 strobes.LED and R7 form power supply indicator.

(3) key circuit is seen Fig. 5-3:

(4) amplifying circuit such as Fig. 5-4:

This circuit is the two-stage amplifying circuit, and the first order is formed amplifying circuit by INA321 and R15 and R13, and amplification is 100 times; The second level is made up of TLC27L2 and R14 and R18, and amplification is 10 times.Vin+ among the figure and Vin-connect the input signal of pick off.

(5) sensor circuit schematic diagram such as Fig. 5-5:

Paste four foil resistance foil gauge R20-R23 at the diplopore cantilever beam sensor, wherein VCC connects the positive pole of power supply, and GND connects power supply ground, and Vin+ and Vin-are signal of sensor.The foil gauge method of attachment is seen shown in Fig. 5-5.

(6) A/D circuit

The nRF9E5 chip integration has become an A/D change-over circuit, and the figure place of A/D conversion can carry out value to its A/D depositor setting by software, and 6,8,10,12 modes are arranged, and the A/D converter acquiescence works in 10 modes.A/D conversion reference voltage can be arranged on (internal reference voltage) between AREF and the 1.22V by software.4 inputs of A/D converter can be selected by software, and passage 0～3 can be converted to digital value to the magnitude of voltage on corresponding pin AIN0～AIN3 respectively, and passage 4 is used for the monitoring to the nRF9E5 running voltage.AREF is corresponding to 30 feet of nRDF9e5 chip, and passage 0～3 is corresponding to 29～25 feet.

(7) wireless transceiver circuit such as Fig. 5-6:

The inner integrated transceiver module of nRF9E5 is so its external circuits figure simply sees Fig. 5-6 for details.NRF9E5 use SPI interface carries out the transfer of data between single-chip microcomputer and wireless module.NRF9E5 uses the characteristic of the ShockBurst of Nordic VLSI company, carries out high-speed data transmission.The agreement that rf data is relevant is handled automatically by the nRF9E5 transceiver in the nRF9E5 sheet.The transceiver of nRF9E5 has three kinds of working methods, and ShockBurst receives (RX) mode, ShockBurst sends (TX) mode and idle mode.Under the ShockBurst receive mode, when receiving the rf data bag of an effective address, MCU reads data in matching addresses register-bit (AM) and DSR register-bit (DR) the notice sheet.Under the ShockBurst send mode, nRF9E5 adds prefix and CRC check for automatically the data that will send.After data sent, DSR register-bit (DR) can notice MCU data dispose.

Using method

(1) annulus 1 of the extension set (see figure 4) of monitor system is hung on the drip stand before using

(2) import the numbering of transfusion device then.

When (3) not hanging anything, press the amplifying circuit aligning key, calibrate.

(4) transfusion device is hung on the hook 2 of monitor system extension set, it is just passable to carry out transfusion operation.

(5) the measured data of system are by the wireless real-time exchange of passing to, and exchange is passed to computer with data by RS232, and computer is handled data, and shows the situation of all extension sets.

(6) when the remaining liq of a certain extension set reached first warning line, this extension set sent chimes of doom, and this extension set of simultaneous computer interface display is to first warning line, and the last liquid of prompting nurse personnel is few; When remaining liq reached second warning line, extension set sent chimes of doom, and computer interface shows this extension set to second warning line, and prompting nurse personnel should pull out pin.

Claims

1, a kind of central transfusion monitoring system, comprise N extension set and an exchange, carry out exchanges data by wireless communication module between extension set and the exchange, it is characterized in that extension set comprises a wireless microcontroller, the detection signal of pick off imports wireless microcontroller into through amplifying circuit, A/D change-over circuit respectively, this microcontroller sends to exchange through the wireless transmit receiving circuit again, and this controller also connects input equipment and warning circuit respectively; Exchange comprises a wireless microcontroller equally, and this controller connects wireless transmit receiving circuit, RS232 interface, input equipment and warning circuit respectively.