CN2206460Y

CN2206460Y - Colon bacillus fluorescence detector

Info

Publication number: CN2206460Y
Application number: CN 94209225
Authority: CN
Inventors: 王铁林
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-16
Filing date: 1994-04-16
Publication date: 1995-08-30
Anticipated expiration: 2004-04-16

Abstract

The utility model relates to a colon bacillus fluorescence detector which belongs to the field of electronic medical instrument. The colon bacillus fluorescence detector is composed of a photoelectric detector, an input and data processing device, an LED display, an auxiliary circuit a power supply, etc. The aim of the utility model is to match with the method which is extensively used for MUG examining colon bacillus in medical field and solve the problem that the detection and data-processing conditions are poor. The utility model has the advantages of environmental improvement and convenient operation. The colon bacillus fluorescence detector can instantly display, the data processing is automatic, and the colon bacillus fluorescence detector has a plurality of original advantages.

Description

Colon bacillus fluorescence detector

The utility model relates to a kind of colibacillus fluorescence detector, belongs to electron medical treatment detecting instrument field.

At present, detect the method for quick of colibacillus, adopt the said MUG check of medical science exactly, its essence is the bioluminescence effect of utilizing bacterium, judge having or not of colibacillus whether to produce fluorescence, but it differentiates that bioluminescence can only carry out in the darkroom, detect by an unaided eye, could determine the MPN value of colibacillus according to the artificial again table of comparisons of observed result, during its operating cost, inaccurate.

The purpose of this utility model is exactly to select advanced integrated circuit and other modern electronic technologies for use, for people provide a kind of colibacillus fluorescence detector that can fast, accurately finish MUG check colibacillus task.

The purpose of this utility model is achieved in that the characteristics according to MUG check colibacillus, designed photoelectric detective circuit, input data processing circuit, LED display circuit, auxiliary circuit and power supply have been formed fluorescence detector, wherein photoelectric detective circuit is used for receiving the fluorescence signal in the MUG check, input and data processing circuit are responsible for shaping, coding and the store function of signal, and auxiliary circuit is then finished and shown control, and the LED display circuit is finished the Presentation Function of information such as MPN value.

Be description of drawings below:

Fig. 1 is a coliform fluorescence detector fundamental diagram;

Fig. 2 is a colibacillus fluorescence detector photoelectric detection part electrical schematic diagram;

Fig. 3 is a colibacillus fluorescence detector digital display part electrical schematic diagram;

Fig. 4 is input of colibacillus fluorescence detector and data processing circuit schematic diagram;

Fig. 5 is a colibacillus fluorescence detector operating surface synoptic diagram;

Wherein: ［ 1 ］ ┅ display screen, ［ 2 ］ ┅ power on light, ［ 3 ］ ┅ power switch.

Below in conjunction with drawings and Examples the utility model is elaborated:

The utility model accompanying drawing provides its a kind of embodiment, it is to be made of housing, Photoelectric Detection, input and data processing, LED demonstration, auxiliary circuit and power supply, photoelectric detective circuit is formed input circuit by highly sensitive light activated element D1 and operational amplifier U1, and have an one-level power amplifier output circuit, and in input circuit, be provided with a potentiometer RU1, can change input sensitivity; Input and data processing circuit are by input, shaping, coding, several parts of database are formed, its input signal is exactly the output signal of photoelectric detective circuit, this signal is divided into three branch roads, feed respectively in three shaping branch circuits, the shaping branch circuit is to be three groups of DLC (digital logic circuit) that 74LS08 constitutes by integrated chip U4, be respectively equipped with a K1 in the shaping branch circuit, K2, K3 inserts key, the output signal of shaping branch circuit is divided into two, press U4A for one, U4B, the U4C order respectively with coding circuit U5, U6, the input end of U7 connects, another is that the input circuit of squegger circuit is connected with auxiliary circuit respectively, coding circuit is by binary counter U5, U6, two groups of circuit of U7 and 60H address scan generator U8 constitute, U5 wherein, U6, six bit address coding A2～A7 is formed in the output of U7, low two bit address A0～A1 are formed in the output of U8, A0～A7 forms the input end that eight bit address sign indicating numbers are input to data processor U10, and the output signal of U8 is through logical circuit U9 in addition, the position of formation LED was selected signal CS1 ┅ CS4 to connect the LED position and is selected input end after U11 handled; But data processor is an EPROM obliterating read-only memory U10, and it is output as D0～D7 octet signal, meets LED display driver circuit U12, U13; Auxiliary circuit U20, U21, U22 are respectively three groups of squeggers of being made up of NE556, wherein U20, U21 respectively in the driving LED+,-show that U22 is the 1KH audio frequency oscillator; U14 is a binary counting BCD decoder driver in the LED display circuit, binary counter U15, U16 form zero clearing and MPN value sensing circuit, wherein U16 is two groups of A, B, 13 pin of U16B connect the clear terminal of U5, U6, U7, U14,1 pin of U16A is through the R of the OE of logic gate U11E to U10 end and U14 end, LED shows four decimal system MPN values in addition, is provided with one and detects jack and detect enter key K1, K2, K3 and MPN value display key K4 on housing ［ 5 ］.Light activated element D1 can be photodiode or photoresistance in this circuit, and its range of receiving needs to decide by measuring.

In use as K1, K2, when K3 inserts, and GD is output as high level, the TH1 end just has trigger pip output, and the U20 driving LED is finished "+" number flicker and shown, delays time ten seconds, when if GD is low level, then TH2 has trigger pip output, and U21 driving LED "-" number flicker shows ten seconds, and no matter the GD input is high level or low level, as long as TH3 all has trigger pip output when inserting among K1, K2, the K3, produce the audio oscillator signal of 0.4 second 1KH by U22; When K1-K3 inserted, the CP of U14 end can produce a trigger pulse, and U14 is counted, and showed decimal system sequence number through decoding rear drive LED charactron, the detection of one group of sample, and sequence number shows from 1 and is accumulated to 9, when pressing the MPN/rest key.When being the K4 input, the OE end of EPROM obtains bearing the effect level, with the MPN value of corresponding address, is directly shown through U12, U13 driving LED by data port output.

The utility model has been avoided conventional dark room operation, and instant digital demonstration, the automatic processing capacity of data are arranged, and can directly show the MPN value, has reduced artificial look-up routine, thereby has obviously improved detection efficiency.

Claims

1, a kind of colibacillus fluorescence detector, constitute by housing, Photoelectric Detection, input and data processing, LED demonstration, auxiliary circuit and power supply, it is characterized in that photoelectric detective circuit forms input circuit by high sensitivity light activated element D1 and operational amplifier U1, and have one-level power amplifier output circuit and in input circuit, be provided with a potentiometer RU1; Input and data processing circuit are by input, shaping, coding, several parts of database are formed, its input signal is exactly the output signal of photoelectric detective circuit, this signal is divided into three branch roads, feed respectively in three shaping branch circuits, the shaping branch circuit is to be three groups of DLC (digital logic circuit) that 74LS08 constitutes by integrated chip U4, be respectively equipped with a K1 in the shaping branch circuit, K2, K3 inserts key, the output signal of shaping branch circuit is divided into two, press U4A for one, U4B, the U4C order respectively with coding circuit U5, U6, the input end of U7 connects, another is that the input circuit of squegger circuit is connected with auxiliary circuit respectively, coding circuit is by binary counter U5, U6, two groups of circuit of U7 and 60H address scan generator U8 constitute, U5 wherein, U6, six bit address coding A2～A7 is formed in the output of U7, low two bit address A0～A1 are formed in the output of U8, A0～A7 forms the input end that eight bit address sign indicating numbers are input to data processor U10, and the output signal of U8 is through logical circuit U9 in addition, the position of formation LED was selected signal CS1---CS4 to connect the LED position and is selected input end after U11 handled; But data processor is an EPROM obliterating read-only memory U10, and it is output as D0～D7 octet signal, meets LED display driver circuit U12, U13; Auxiliary circuit U20, U21, U22 are respectively three groups of squeggers of being made up of NE556, wherein U20, U21 respectively in the driving LED+,-show that U22 is the 1KH audio frequency oscillator; U14 is a binary counting BCD decoder driver in the LED display circuit, binary counter U15, U16 form zero clearing and MPN value sensing circuit, wherein U16 is two groups of A, B, 13 pin of U16B connect the clear terminal of U5, U6, U7, U14,1 pin of U16A is through the R of the OE of logic gate U11E to U10 end and U14 end, LED shows four decimal system MPN values in addition, is provided with one and detects jack and detect enter key K1, K2, K3 and MPN value display key K4 on housing [5].

2, colibacillus fluorescence detector according to claim 1 is characterized in that light activated element D1 can be photodiode or photoresistance.