CN216484752U - Miniature electrochemical detection device - Google Patents

Abstract

The utility model provides a miniature electrochemical detection device, which comprises a device cover, a sensing unit and a device main body, wherein the sensing unit is arranged on the device cover; the top end of the device main body is provided with a signal spring pin; the sensing unit is used for being placed on the top end of the device main body and abutting against the signal spring needle; the device cover is detachably connected with the device main body; when the device cover is connected with the device main body, the sensing unit and the signal elastic needle are accommodated in the cavity of the device cover, and the sensing unit is elastically abutted against the signal elastic needle; the top end of the device cover is provided with an opening. The front side of the sensing unit of the miniature electrochemical detection device is provided with the sensor for sensing, and the back side of the sensing unit is used for fixing the sensing unit between the device cover and the device main body by applying acting force through the elastic needle, so that the sealing property of the device is enhanced, the sensing unit is convenient to replace, the application scene of the electrochemical detection device is expanded, the detection accuracy is improved, and the service life of the device is prolonged.

Description

Miniature electrochemical detection device

technical field

The utility model relates to the technical field of electrochemical analysis and detection, in particular to a miniature electrochemical detection device.

Background technique

Electrochemical detection devices have the advantages of small size, low cost, and high scalability in practical applications, and because they can directly generate electrochemical detection results by measuring electrical signals, they are widely used in on-site point-of-care diagnosis, environmental monitoring, and basic research. Usually, the electrochemical sensor in the electrochemical detection device needs to be replaced frequently, so the separate design of the sensor and the detection circuit can reduce the cost of use.

The current miniature electrochemical detection device usually uses a plug-in connection between the sensor and the device. Due to the small size of the device, and the connection port is set at one end of the sensor, it is easy to cause contact between modules due to installation size errors. Bad, unable to seal, resulting in inaccurate test results. Moreover, in practical applications, it is often necessary to put the electrochemical detection device into the liquid to be tested for electrochemical detection. The interface module of the poorly sealed device is easily corroded by the immersed liquid to be tested, which affects the device to a great extent. service life and application range.

Utility model content

The technical problem to be solved by the utility model is to overcome the defect that the detachable sensing unit of the miniature electrochemical detection device in the prior art is not easy to be sealed by using a plug-in interface, which will reduce the detection accuracy and the service life of the device, and provides a Miniature electrochemical detection device.

The utility model solves the above-mentioned technical problems through the following technical solutions:

The utility model provides a miniature electrochemical detection device, comprising a device cover, a sensing unit and a device main body;

The top of the main body of the device is provided with a signal pin;

The sensing unit is used for being placed on the top end of the device body and abutting with the signal spring needle;

The device cover is detachably connected to the device main body;

When the device cover is connected to the device main body, the sensing unit and the signal spring needle are accommodated in the cavity of the device cover, and the sensing unit and the signal spring needle are elastically abutted;

The top of the device cover is provided with an opening.

Preferably, a sealing ring is included between the device cover and the sensing unit, and the sealing ring is arranged around the contour of the sensing unit.

Preferably, several sensors are arranged on the front of the sensing unit; the several sensors are in direct contact with the outside world through the opening;

The back of the sensing unit is provided with several signal interfaces, and one or more of the signal interfaces corresponds to one or more of the several sensors;

The signal interface is elastically abutted with the corresponding signal spring pin.

Preferably, the several sensors include one or more of temperature sensors, redox electrodes, and solid-state ion-selective electrodes.

Preferably, the top end of the device body is also provided with a first elastic pin and a second elastic pin;

The back of the sensing unit is also provided with a memory chip interface and an in-position interface;

When the device cover is connected to the device main body, the first elastic pin is in elastic contact with the memory chip interface, and the second elastic pin is elastically in contact with the in-position interface.

Preferably, the top of the main body of the device is further provided with a power spring pin, and the power spring pin is used to connect the charging device.

Preferably, the miniature electrochemical detection device further includes a cavity.

Preferably, the miniature electrochemical detection device further comprises a motion sensor and a processor;

The motion sensor is used to obtain the current position information of the micro electrochemical detection device;

The sensing unit is used to obtain electrochemical detection information;

The processor is configured to acquire and store the current location information and the electrochemical detection information;

The processor is also configured to generate an electrochemical detection result based on the electrochemical detection information.

Preferably, the miniature electrochemical detection device further comprises a wireless communication module, the wireless communication module is connected with the processor, and the wireless communication module is used for the current position information received from the processor , the electrochemical detection information and the electrochemical detection result are transmitted to an external terminal device.

Preferably, the wireless communication module includes any one or more of a Bluetooth module, a Wi-Fi module, a 2G communication module, a 3G communication module, a 4G communication module and a 5G communication module.

The positive improvement effect of the present utility model is that: the miniature electrochemical detection device provided by the present utility model sets the sensing unit to be on both sides, the front side is provided with a sensor for sensing, and the back side uses a spring needle to apply force to the sensing unit. It is fixed between the device cover and the device main body, which enhances the sealing of the device, makes the sensing unit easy to replace, expands the application scene of the electrochemical detection device, improves the detection accuracy and the service life of the device.

Description of drawings

FIG. 1 is a first overall schematic diagram of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

2 is a second overall schematic diagram of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

3 is an exploded view of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

4 is a schematic front view of a sensing unit of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

FIG. 5 is a schematic view of the reverse side of a sensing unit of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

6 is a schematic diagram of a control circuit of a device main body of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

FIG. 7 is a schematic diagram of a power supply pin of a miniature electrochemical detection device according to an exemplary embodiment of the present invention.

Detailed ways

The present utility model will be more clearly and completely described below with reference to the accompanying drawings by taking an exemplary embodiment.

The present exemplary embodiment discloses a miniature electrochemical detection device, the overall appearance of which is in the shape of a capsule. As shown in Figures 1 and 2, the above-mentioned device has a diameter of 30mm and a length of 52mm, which can realize multi-channel online measurement and measurement of pH value, dissolved oxygen, temperature and inorganic salt concentration in bioreactors, water bodies and other scenarios. analyze.

Specifically, as shown in FIG. 3 , the miniature electrochemical detection device in this embodiment includes a device cover 1 , a sensing unit 2 and a device body 3 ;

The top of the device main body 3 is provided with a signal spring needle 31;

The sensing unit 2 is used to be placed on the top end of the device main body 3 and abut against the signal spring pin 31;

The device cover 1 is detachably connected to the device main body 3;

When the device cover 1 is connected to the device main body 3, the sensing unit 2 and the signal spring needle 31 are accommodated in the cavity of the device cover, and the sensing unit 2 and the signal spring needle 31 are elastically abutted;

The top of the device cover 1 is provided with an opening.

The sensing unit 2 and the device main body 3 of the miniature electrochemical detection device are two independent components, and the two are detachably connected. In other words, in order to realize more types of electrochemical detection, the sensing unit 2 can be replaced as a single component as a whole, so as to allow different types of sensors to be installed into the miniature electrochemical detection device according to actual needs. Correspondingly, the device main body 3, as a component, can be replaced at any time after being disassembled, thereby improving the overall utilization rate and service life of the miniature electrochemical detection device.

A plug-in connection is usually used between the sensing unit and the main body of the traditional electrochemical detection device, and the connection port is arranged at one end of the sensor, which is difficult to seal. In addition, due to the small size of the miniature electrochemical detection device, it is easy to cause poor contact between modules and damage to the interface due to installation size errors, misalignment of the interface during operation, etc. when plugging and unplugging at the interface.

Based on the need to replace the sensing unit 2, the signal spring pin 31 is used in this embodiment to apply a force to the sensing unit 2 to abut the sensing unit 2 against the corresponding position of the device cover 1, thereby closing the sensing unit 2, the gap between the device body 3 and the device cover 1 due to the connection, to replace the plug-in interface.

Specifically, the outer edge of the sensing unit 2 has a limit groove corresponding to the top of the device body 3. In actual implementation, the sensing unit 2 only needs to be connected to the device body 3 according to the position of the limit groove, and the signal spring pin 31 is automatically abutted to the corresponding position of the sensing unit 2 . This abutting method not only effectively reduces the wear of the interface during the plugging and unplugging process, but also avoids the above-mentioned problems that may occur when plugging and unplugging the interface, but also effectively prevents the gas, liquid, etc. in the environment from entering the device and corroding the device. individual components and thus reduce the possible impact on the inspection data.

As a preferred embodiment, a sealing ring 4 is included between the device cover 1 and the sensing unit 2 , and the sealing ring 4 is arranged around the contour of the sensing unit 2 . The sealing ring 4 can form a seal at the interface between the sensing unit 2 and the device main body 3 to further improve the tightness of the device interface. In addition, the connection part between the device main body 3 and the device cover 1 is also sealed again with a double-layer O-shaped rubber sealing ring 32 to further improve its protective performance and prolong the service life of the device.

In addition to applying force, the signal spring pin 31 at the top of the device main body 3 also serves as a connecting piece between the sensing unit 2 and the device main body 3 in this embodiment. After abutting with the sensing unit 2, the signal spring pin 31 can realize the connection between the sensing unit 2 and the device main body 3, so that the sensing data of the sensor, the electrochemical analysis data and the sensing data can be carried out between the two. Reading and transmission of unit chip preset data, etc.

Since the miniature electrochemical detection device in this embodiment can be directly placed in the bioreactor for use, in order to meet the requirements of sealing and high-temperature sterilization before the use of the bioreactor, the shell of the miniature electrochemical detection device is made of high temperature resistant materials .

In the specific implementation, the entire miniature electrochemical detection device is directly placed in the environment to be measured, and the sensing unit 2 directly contacts the environment to be measured through the opening at the top of the device 1 to perform sensing.

As a specific embodiment, as shown in FIG. 4 and FIG. 5 , several sensors are provided on the front of the sensing unit 2; the above-mentioned several sensors are in direct contact with the outside world through the opening;

The back of the sensing unit 2 is provided with several signal interfaces 22, and one or more of the above-mentioned signal interfaces 22 corresponds to one or more of the several sensors;

The signal interface 22 is in elastic contact with the corresponding signal spring pin 31 .

In this embodiment, the sensing unit 2 is arranged on both sides, with several sensors on the front and signal interfaces 22 corresponding to these sensors on the back.

After the device cover 1 is installed on the device body 3, the area where the sensor is located directly contacts the environment to be tested through the opening of the device cover 1, while the back of the sensing unit 2 and the connection between the sensing unit 2 and the device body 3 are sealed to be isolated from the external environment. In this way, the contact area between other areas except the sensor area and the external environment can be minimized, which effectively prevents the device from being corroded.

The sensing unit 2 in this embodiment includes, but is not limited to, an electrochemical array sensing chip. In order to be able to perform multi-channel data collection on several sensors on it, one or more of the signal interfaces 22 on the back of the sensing unit 2 correspond to one or more of the several sensors on the front of the sensing unit 2, so as to detect different sensors. Sensing data is selectively transmitted.

In another specific embodiment, the number of sensors includes one or more of a temperature sensor 211 , a redox electrode 212 and a solid state ion selective electrode 213 . Among them, the temperature sensor 211 is used to measure the temperature in the environment to be measured; the redox electrode is used to measure dissolved oxygen; the solid state ion selective electrode is used to measure pH value and ion concentration, such as Ca ²⁺ , K ⁺ , Na ⁺ , Mg ²⁺ , NH ₄ ⁺ etc.

Solid-state ion-selective electrodes use high-density polymers as the ion-selective layer matrix to have high thermal stability, so as to meet the application requirements of high-temperature sterilization. By integrating a variety of solid-state ion-selective electrodes, the concentration of each ion in the system to be measured is dynamically detected, and the background interference and the mutual interference between the ions to be measured are eliminated through the data processing module.

It is to be understood that three types of sensors are listed here, but are not thus limited to the types of sensors that may be included. The specific sensor type can be arbitrarily set according to application scenarios and actual needs, for example, corresponding sensors for electrochemical detection of glucose, lactic acid, etc. can also be added.

As a preferred embodiment, the top end of the device main body 3 is also provided with a first elastic pin and a second elastic pin;

The back of the sensing unit 2 is also provided with a memory chip interface 221 and an in-position interface 222;

When the device cover 1 is connected to the device body 3 , the first spring pin is in elastic contact with the memory chip interface 221 , and the second spring pin is in elastic contact with the in-position interface 222 .

In this embodiment, not only the use of the signal pin 31 for data transmission, but also the use of multiple pins to realize different types of functions. For example, as shown in FIG. 6 , the device main body 3 includes a control circuit, and the control circuit is provided with multiplexing, battery interface, power management chip, analog front end, control chip and Bluetooth module. Different modules of the control circuit are connected to different pins for functional control.

Specifically, the first spring pin contacts the memory chip interface 221, so that the control chip on the circuit in the device body reads the pre-stored data in the memory chip, or stores new data in the memory chip; the second spring pin contacts It is connected to the in-position interface 222 , so that the corresponding module of the control circuit judges whether the sensing unit 2 is successfully connected to the device main body 3 . Likewise, these elastic pins are also in elastic contact with the sensing unit 2, so as to improve the sealing performance of the interface.

As shown in FIG. 7 , as another preferred embodiment, the top of the device main body 3 is further provided with a power spring pin 33 , and the power spring pin 33 is used to connect an external charging device. In this embodiment, the device body 3 has a matching charging suit, and the power spring pin 33 can charge the device body 3 when it is connected to the charging device; when not connected to an external charging device, the power spring pin 33 also acts as a The force-applying structure is used to resist the sensing unit 2 .

It should be understood that the miniature electrochemical detection device in this embodiment may further include more spring pins to achieve more functions, for example, enabling the control chip to activate the sensor for sensing and the like.

In a preferred embodiment, the above-mentioned miniature electrochemical detection device further includes a cavity. The environment to be tested for electrochemical detection is usually various liquid environments. Due to the different densities of various liquids, it is difficult to control the position of the device in the liquid. The micro-electrochemical detection device provided in this embodiment can float or sink by injecting gas/liquid into its cavity or extracting gas/liquid from the cavity according to the actual application scenario, and can better detect Electrochemical detection is performed at different positions of the liquid to provide more accurate electrochemical detection results.

In order to better control the position of the micro-electrochemical detection device in the environment to be measured, in a preferred manner, the above-mentioned micro-electrochemical detection device further includes a motion sensor and a processor;

The motion sensor is used to obtain the current position information of the micro electrochemical detection device;

The sensing unit is used to obtain electrochemical detection information;

The processor is configured to acquire and store current location information and electrochemical detection information;

The processor is also configured to generate an electrochemical detection result based on the electrochemical detection information.

In this embodiment, the above-mentioned micro electrochemical detection device is further provided with a motion sensor to measure the specific position of the device in the environment to be measured. The above-mentioned miniature electrochemical detection device also directly performs data acquisition and online data processing in the environment to be measured through the processor.

In another preferred embodiment, the miniature electrochemical detection device further includes a wireless communication module, the wireless communication module is connected to the processor, and the wireless communication module is used for the current location information, electrical Chemical detection information and electrochemical detection results are transmitted to external terminal equipment. The above wireless communication module preferably includes any one or more of a Bluetooth module, a Wi-Fi module, a 2G communication module, a 3G communication module, a 4G communication module and a 5G communication module.

In this embodiment, the micro-electrochemical detection device can send the collected data to an external device in real time through the wireless communication module, or perform online analysis of the target system through the processor in the device, and then send the analysis results to the wireless communication module. External equipment to realize remote real-time monitoring of electrochemical detection devices.

In the miniature electrochemical detection device in this embodiment, a signal spring needle is used for elastic abutment between the sensing unit and the main body of the device to replace the plug-in interface, which better realizes the interface sealing of the microdevice with replaceable sensing unit. , reducing the contact area between the sensor and the substance to be measured, and improving the detection accuracy and service life of the electrochemical detection device.

It should be noted that the foregoing embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the embodiments of the present invention have been shown and described, those of ordinary skill in the art should Modifications are made to the technical solutions described in the foregoing embodiments, or some or all of the technical features thereof are equivalently replaced within the scope of not departing from the technical solutions of the present invention.

Claims (10)

1. A miniature electrochemical detection device, characterized in that, comprising a device cover, a sensing unit and a device main body; The top of the main body of the device is provided with a signal pin; The sensing unit is used for being placed on the top end of the device body and abutting with the signal spring needle; The device cover is detachably connected to the device main body; When the device cover is connected to the device main body, the sensing unit and the signal spring needle are accommodated in the cavity of the device cover, and the sensing unit and the signal spring needle are elastically abutted; The top of the device cover is provided with an opening. 2 . The miniature electrochemical detection device according to claim 1 , wherein a sealing ring is included between the device cover and the sensing unit, and the sealing ring is arranged around the outline of the sensing unit. 3 . 3 . The miniature electrochemical detection device according to claim 1 , wherein a plurality of sensors are provided on the front of the sensing unit; the plurality of sensors are in direct contact with the outside world through the opening; 4 . The back of the sensing unit is provided with several signal interfaces, and one or more of the signal interfaces corresponds to one or more of the several sensors; The signal interface is elastically abutted with the corresponding signal spring pin. 4. The miniature electrochemical detection device of claim 3, wherein the several sensors comprise one or more of a temperature sensor, a redox electrode and a solid-state ion-selective electrode. 5. The miniature electrochemical detection device according to claim 3, wherein the top of the device main body is further provided with a first elastic pin and a second elastic pin; The back of the sensing unit is also provided with a memory chip interface and an in-position interface; When the device cover is connected to the device main body, the first spring pin is in elastic contact with the memory chip interface, and the second spring pin is in elastic contact with the in-position interface. 6 . The miniature electrochemical detection device according to claim 1 , wherein the top of the device main body is further provided with a power spring pin, and the power spring pin is used to connect the charging device. 7 . 7 . The miniature electrochemical detection device according to claim 1 , wherein the miniature electrochemical detection device further comprises a cavity. 8 . 8. The miniature electrochemical detection device according to claim 1, wherein the miniature electrochemical detection device further comprises a motion sensor and a processor; The motion sensor is used to obtain the current position information of the micro electrochemical detection device; The sensing unit is used to obtain electrochemical detection information; The processor is configured to acquire and store the current location information and the electrochemical detection information; The processor is also configured to generate an electrochemical detection result based on the electrochemical detection information. 9 . The miniature electrochemical detection device according to claim 8 , wherein the miniature electrochemical detection device further comprises a wireless communication module, the wireless communication module is connected with the processor, and the wireless communication module is used for 9 . to transmit the current location information, the electrochemical detection information and the electrochemical detection result received from the processor to an external terminal device. 10. The miniature electrochemical detection device according to claim 9, wherein the wireless communication module comprises a Bluetooth module, a Wi-Fi module, a 2G communication module, a 3G communication module, a 4G communication module and a 5G communication module. any one or more.

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