Automatic light intensity regulation and control system for inactivation cabinet

Abstract

An automatic light intensity regulation and control system for an inactivation cabinet comprises a plurality of irradiation sensors which are respectively arranged at each layer of light source in the inactivation cabinet; the plurality of independently arranged detection circuits are respectively connected with the irradiation sensor; a preset reference value is built in the main control module, the ultraviolet radiation intensity value output by the detection circuit is compared with the preset reference value, and a corresponding adjusting signal is output according to a comparison result; and the plurality of regulation and control circuits are controllably connected with the ballasts of the light sources on each layer and are used for receiving the regulation signals output by the main control module and regulating the ultraviolet radiation intensity of the light sources on each layer in real time. The ultraviolet radiation intensity value detected by the radiation sensor is compared with the preset value of the main control module in real time by utilizing the detection circuit, and the output of the regulation and control circuit is driven according to the comparison result, so that the regulation of the ultraviolet radiation intensity of the light source is controlled, the ultraviolet radiation intensity of each layer of light source is always kept consistent, and the inactivation effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a light intensity automatic control system for inactivation cabinet. BACKGROUND

[0002] Blood pathogen inactivation is an important means to ensure blood safety. Blood pathogen inactivation refers to destroying the structure of viral protein or viral nucleic acid by physical or chemical means, so that viruses that may exist in blood lose the ability of infection, pathogenesis and reproduction. Common methods of blood inactivation technology include pasteurization, organic solvent / detergent mixture (S / D) method, membrane filtration method, methylene blue photochemical method, psoralen photochemical method and riboflavin photochemical method. Among them, the methylene blue method is widely used in China. This method requires sufficient amount of methylene blue, but methylene blue has residual toxicity, and the protein loss of treated plasma is large. Riboflavin photochemical method is a new and safer pathogen inactivation method, which has the characteristics of wide inactivation spectrum and safe additive, and has better application prospect. The riboflavin virus inactivation method is to add a certain amount of riboflavin to blood or blood products, and then place them in an ultraviolet light irradiation environment. After absorbing photon energy, the viral nucleic acid is destroyed, the pathogen loses the replication activity, and the purpose of virus inactivation is achieved.

[0003] In the process of inactivating existing blood products, an inactivation blood bag is generally used to hold blood products. In actual operation, the plasma bag is placed on a tray, and the tray is pushed into the inactivation cabinet for light inactivation. The inactivation effect is affected by the light intensity of the internal light source. The uneven light intensity may cause inconsistent inactivation effect. At present, in order to uniform the light intensity, the layout of the light source is generally changed to ensure the uniformity of the light intensity in the lamp tube coverage range. However, this method is affected by the performance of the lamp tube, and the performance consistency of the lamp tube needs to be ensured to better realize the uniformity of the light intensity in the irradiation range, so that the inactivation effect is consistent. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a light intensity automatic control system for inactivation cabinet.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A light intensity automatic control system for inactivation cabinet comprises:

[0007] A plurality of irradiation sensors are respectively arranged at each layer of light source in the inactivation cabinet, for detecting the ultraviolet irradiation intensity of each layer of light source.

[0008] A plurality of independent detection circuits are connected with the irradiation sensor respectively, and are used for converting and outputting the ultraviolet irradiation intensity value detected by the irradiation sensor to the main control module in real time.

[0009] The main control module compares the ultraviolet irradiation intensity value output by the detection circuit with the preset reference value, and outputs a corresponding adjustment signal according to the comparison result.

[0010] A plurality of regulation circuits are electrically connected with the ballasts connected with the light sources of each layer, and are used for receiving the adjustment signal output by the main control module, and adjusting the ultraviolet irradiation intensity of each layer of light source by adjusting the voltage of the ballast.

[0011] The detection circuit comprises:

[0012] An interface P12 is used for pluggable connection with the irradiation sensor, and has at least three wiring ends, one of which is connected with the ground.

[0013] A power supply circuit is connected with one of the wiring ends of the interface P12.

[0014] An output circuit is connected with another wiring end of the interface P12.

[0015] The output circuit comprises a resistor R65 connected in series between the interface P12 and the main control module, and the front and back sides of the resistor R65 are connected with the ground through a resistor R67 and a capacitor C42 respectively.

[0016] The resistor R65 and the interface P12 are connected with the ground through a diode D18.

[0017] The main control module is provided with an input unit for inputting the preset reference value.

[0018] One regulation circuit can realize the control of two ballasts.

[0019] The regulation circuit comprises an operational amplifier U12 and an interface P7 connected with the output end of the operational amplifier U12, the positive input end of the operational amplifier U12 is connected with the output end of the main control module, the negative input end of the operational amplifier U12 is connected with the ground through a resistor R36, and a resistor R38 is connected in parallel between the negative input end and the output end of the operational amplifier U12.

[0020] The operational amplifier U12 integrates two amplification circuits, and the positive input ends of the two amplification circuits are connected with one output end of the main control module, and the output ends of the two amplification circuits are connected with one ballast respectively.

[0021] The utility model discloses a beneficial effect: the present application utilizes detection circuit real -time with the preset value of main control module compares the ultraviolet radiation intensity value that irradiation sensor detects, according to the output of the comparison result to drive the regulation and control circuit, and then control the adjustment of the ultraviolet radiation intensity of light source, through every independent detection and control, make the ultraviolet radiation intensity of every layer light source always keep consistency, improve inactivation effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the principle block diagram of the utility model.

[0023] Figure 2 It is the circuit principle diagram of the main control module of the utility model.

[0024] Figure 3 It is the circuit principle diagram of the regulation and control circuit of the utility model.

[0025] Figure 4 It is the circuit principle diagram of the detection circuit of the utility model.

[0026] Figure 5 It is the distribution schematic diagram of the irradiation sensor of the utility model. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the utility model.

[0028] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0029] As shown in the figure, the utility model provides a kind of light intensity automatic regulation and control system for inactivation cabinet, and inactivation cabinet is divided into several layers, and each layer is equipped with corresponding light source, and the light intensity automatic regulation and control system of the present application detects the ultraviolet irradiation intensity of each layer light source, and controls it to be always in the allowable range of set value.

[0030] It includes irradiation sensor, detection circuit, main control module and regulation and control circuit.

[0031] Its principle is as follows Figure 1As shown, the riboflavin pathogen inactivation device adopts UVB ultraviolet lamp tube as the main device for pathogen inactivation, and part of the circuit in its composition is designed to support automatic control of ultraviolet irradiation intensity. In use, it needs to be matched with a corresponding adjustable voltage ballast to realize its complete function. The main principle of the circuit part is: the main control board (i.e. the main control module) receives the ultraviolet irradiation data feedback from the irradiation sensor, compares it with the internal set parameters after simple processing, then adjusts the signal voltage supplied to the ballast through this part of the circuit, and cooperates with the ballast to give the corresponding feedback (increase or decrease the input and output power of the ultraviolet lamp tube) according to the given signal to realize the function of automatic control of ultraviolet irradiation intensity.

[0032] A plurality of irradiation sensors are respectively arranged at each layer of light sources in the inactivation cabinet for detecting the ultraviolet irradiation intensity of each layer of light sources. The irradiation sensor is preferably arranged at the middle position of each layer of light sources, as shown in FIG. 5, which can be arranged at the middle position of the length direction of the lamp tube, i.e. can be arranged at the X axis in Figure 5 In this embodiment, a total of 8 groups of irradiation sensors and a plurality of detection circuits are used, of which 6 groups of irradiation sensors are required for work, and the other two groups are used as backup. The inactivation cabinet provided by the present application contains six layers of light sources, and each irradiation sensor is arranged corresponding to one layer of light sources. Each layer of light sources adopts 7 UVB ultraviolet lamp tubes, and each two UVB ultraviolet lamp tubes are connected with one ballast. That is, four ballasts are respectively connected with two detection circuits, i.e. a total of 42 lamp tubes are controlled. In some embodiments, 8 UVB ultraviolet lamp tubes can be used, i.e. 8 UVB ultraviolet lamp tubes per layer, a total of 48 lamp tubes are controlled.

[0033] The lamp tube of the present application is not limited to UVB ultraviolet lamp tube, such as UVA ultraviolet lamp tube and other types on the market can be used.

[0034] One layer of light source is composed of four groups of light source arrays, and each two groups of light source arrays are respectively connected with one ballast. The light source array can adopt independent ultraviolet lamp tubes, and the corresponding two ultraviolet lamp tubes are controlled by the ballast;

[0035] A plurality of independently arranged detection circuits are respectively connected with the irradiation sensors for outputting the ultraviolet irradiation intensity value detected by the irradiation sensors to the main control module in real time. The detection circuit connects the irradiation sensor and the main control module to play the role of signal transmission, and needs to pre-process the signal to ensure the accuracy of the signal received by the main control module, and then play a more accurate light intensity regulation;

[0036] The main control module, such as Figure 2As shown, the preset reference value is built-in, which can be input and set by increasing the input unit, and then the required light intensity can be adjusted autonomously to meet different inactivation effects. The main control module compares the ultraviolet radiation intensity value output by the detection circuit with the preset reference value, and outputs a corresponding adjustment signal according to the comparison result.

[0037] A number of regulation circuits, such as Figure 3 As shown, the regulation circuit is controllably connected to the ballast of the light source of each layer, for receiving the adjustment signal output by the main control module, and adjusting the ultraviolet radiation intensity of each layer of light source in real time. The regulation circuit adjusts the output voltage according to the adjustment signal output by the main control module, so that the voltage of the ballast connected thereto changes, and then the power of each light source connected thereto changes, so as to realize the change of the ultraviolet radiation intensity value of the light source.

[0038] As shown in Figure 4 The detection circuit comprises:

[0039] An interface P12 is used for pluggable connection with the irradiation sensor, and has at least three wiring ends, one of which is connected to ground.

[0040] A power supply circuit is connected to one of the wiring ends of the interface P12, wherein the power supply circuit supplies power to the irradiation sensor connected to the interface P12, so that the irradiation sensor can work normally.

[0041] An output circuit is connected to another wiring end of the interface P12, for transmitting the data detected by the irradiation sensor to the main control module via the output circuit, and comparing the data by the main control module, and outputting a corresponding adjustment signal to adjust the ultraviolet radiation intensity of the light source to meet the preset value.

[0042] Through real-time detection, the ultraviolet radiation intensity of the light source can be adjusted autonomously and maintained within the set value range in real time.

[0043] The output circuit comprises a resistor R65 connected in series between the interface P12 and the main control module, and the front and back sides of the resistor R65 are connected to ground through a resistor R67 and a capacitor C42 respectively. By designing the resistor R56 and the resistor R67, the input voltage resistance is divided and transmitted to the input pin of the main control module in a reduced proportion, and the capacitor C42 is designed to make the input voltage more stable.

[0044] The resistor R65 and the interface P12 are connected to ground through a diode D18, which adopts a voltage stabilizing tube. According to the principle of reverse breakdown voltage stabilization of the voltage stabilizing diode, the voltage input by the interface P12 can be clamped to realize protection of the input of the interface P12.

[0045] The master module is provided with an input unit for inputting a preset reference value, which can be a touch screen or a button structure, and is used for modifying the preset reference value.

[0046] One regulation circuit can realize the control of two ballasts, and can be set to control two ballasts according to requirements, meet the control requirements of double light sources in one layer in the embodiment, and reduce the cost.

[0047] The regulation circuit comprises an operational amplifier U12 and an interface P7 connected with the output end of the operational amplifier U12, the positive input end of the operational amplifier U12 is connected with the output end of the master module, the negative input end of the operational amplifier U12 is grounded through a resistor R36, and the negative input end and the output end of the operational amplifier U12 are connected in parallel with a resistor R38. The output signal voltage is amplified by the operational amplifier, and the control requirements of the ballast are better met.

[0048] The operational amplifier U12 integrates two amplification circuits, that is, two operational amplifiers are integrated into one operational amplifier, the cost is reduced, the layout space requirement is reduced, and the positive input ends of the two amplification circuits are connected with one output end of the master module, and the output ends of the two amplification circuits are connected with one ballast respectively.

[0049] The embodiment should not be regarded as a limitation of the utility model, but any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A light intensity automatic regulation system for a deactivation cabinet, characterized in that: The application relates to a UV irradiation intensity real-time monitoring and adjusting device for a UV inactivation cabinet. The device comprises: a plurality of irradiation sensors arranged at each layer of light sources in the UV inactivation cabinet respectively, for detecting the UV irradiation intensity of each layer of light sources; a plurality of independently arranged detection circuits connected with the irradiation sensors respectively, for converting and outputting the UV irradiation intensity value detected by the irradiation sensors to a master control module in real time; the master control module, which is internally provided with a preset reference value, compares the UV irradiation intensity value output by the detection circuit with the preset reference value, and outputs a corresponding adjusting signal according to the comparison result; 2. The light intensity automatic control system for the inactivation cabinet according to claim 1, characterized in that: a plurality of regulating circuits electrically connected with the ballasts connected with each layer of light sources, for receiving the adjusting signal output by the master control module and adjusting the UV irradiation intensity of each layer of light sources by adjusting the voltage of the ballasts. The detection circuit comprises: an interface P12, which is used for pluggable connection with the irradiation sensor and has at least three wiring ends, one of which is connected with the ground; a power supply loop connected with one of the wiring ends of the interface P12; 3. The light intensity automatic control system for the inactivation cabinet according to claim 2, characterized in that: an output loop connected with another wiring end of the interface P12.

4. The light intensity automatic control system for the inactivation cabinet according to claim 3, characterized in that: The output loop comprises a resistor R65 connected in series between the interface P12 and the master control module, and the resistor R65 has its front and back sides connected with the ground through a resistor R67 and a capacitor C42 respectively.

5. The light intensity automatic control system for the inactivation cabinet according to claim 1, wherein: The resistor R65 and the interface P12 are connected with the ground through a diode D18.

6. The light intensity automatic control system for the inactivation cabinet according to claim 1, wherein: The master control module is provided with an input unit for inputting the preset reference value.

7. The light intensity automatic control system for inactivation cabinet according to claim 1 or 6, characterized in that: One regulating circuit can realize the control of two ballasts.

8. The light intensity automatic control system for the inactivation cabinet according to claim 7, characterized in that: The regulating circuit comprises an operational amplifier U12 and an interface P7 connected with the output end of the operational amplifier U12, the positive input end of the operational amplifier U12 is connected with the output end of the master control module, the negative input end of the operational amplifier U12 is connected with the ground through a resistor R36, and a resistor R38 is connected in parallel between the negative input end and the output end of the operational amplifier U12. The operational amplifier U12 integrates two amplification circuits, and the positive input ends of the two amplification circuits are connected with one output end of the master control module, and the output ends of the two amplification circuits are connected with one ballast respectively.

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