TWI412740B - Test strip, biochemical test system, and measurement device - Google Patents

Abstract

A test strip, a biochemical test system, and a measurement device are provided. The test strip includes an insulating substrate, an electrode system, and an identifying unit. The electrode system is disposed on the insulating substrate. The identifying unit is disposed on a surface of the insulating substrate. The identifying unit includes N components and two connecting devices, and each of the N components has a passive electric characteristic, wherein one connecting device connects to one end of each of the components, and the other connecting device connects to the other end of each of the components. The electric characteristic composed of the N components and the two connecting devices decides an identifying code of the test strip.

Description

Test strip, biochemical sensing system, and measuring device

The present invention relates to a test strip, a biochemical sensing system, and a measuring device, and more particularly to a biochemical sensing system, a measuring device, and a test strip for automatically identifying or correcting the need for a password card.

With the advancement of medicine and the increasing awareness of modern people's health care concepts, the market penetration of Point-of-Care (POCT) has also increased. Such tests tend to be fast, inexpensive, small, and self-testing products that do not require professional operation, such as blood glucose meters, electronic ear thermometers, and electronic sphygmomanometers. In this field, the use of test strips is already a very sophisticated technology, and the most widely used for analyzing blood sugar.

In the conventional biochemical sensing system, each batch of test strips has been set with unique variation parameters or identification codes during the production process. Therefore, the measurement device needs to be identified or corrected by a code card before the measurement test piece is measured using a measuring device, such as U.S. Patent No. 5,366,609 and PCT Patent No. WO 00/33072. The number revealed. However, the burning and preparation of the cryptographic card increases labor and manufacturing costs, and problems such as correction errors and data interpretation errors, or loss of the PIN card are often caused by the user forgetting to insert or insert the wrong PIN card.

In order to improve the inconvenience caused by the use of the PIN card, a test piece using a bar code as a recognition method is disclosed in U.S. Patent No. 6,814,844. U.S. Patent No. 6,814,844 utilizes high energy pulsed laser light to bombard the surface of a gold target that has been applied to a substrate such that the surface of the gold target evaporates instantaneously to form a bar code pattern. However, this barcode is identified by an optical inspection system that requires additional optical components, such as CCD or LED detection, and is therefore more expensive to manufacture. Moreover, the reproducibility and accuracy of such identification bar codes are limited by the surface material of the target, which not only causes process limitations but also increases manufacturing costs.

In addition, the new patent No. M304662 of the Republic of China discloses another biometric sensing system for password-free card, which is provided with a plurality of buttons on the detecting device for inputting a predetermined English letter or number, the predetermined English letter or number sign. The test piece is packaged (outer box, plastic box, manual, etc.) and corresponds to a set of parameters preset inside the detecting device. When the predetermined English letter or number is input, the corresponding parameter is transmitted to a microprocessor in the detecting device to perform a setting correction on the detecting device for accurate testing purposes.

The patent application No. 97208206 of the Republic of China also discloses a test piece for a password-free card, which is provided with a plurality of constituent elements on one end of the test piece, and punches a part of the constituent elements to form an electrical connection of 0 or 1. Combine multiple graphic codes. However, this detection system has A variety of limitations, such as the punching process requires high precision, the alignment between the sensing terminals of the measuring device and the respective components requires high precision, and because the image on the test piece is tooth-shaped, when the amount is placed The measuring device also has the risk of breaking.

Therefore, it is necessary to provide a biochemical sensing system that is free from identification or correction of a PIN card and has the convenience of detection.

In view of the problems of the prior art, the present invention provides an automatic identification or correction biochemical sensing system, a measuring device and a test strip which can eliminate the use of a PIN card, reduce operational errors, and improve the convenience of detection.

According to an aspect of the invention, a test strip is provided. The test strip comprises an insulating substrate, an electrode group, and an identification unit. The electrode group is disposed on the insulating substrate. The identification unit is disposed on a surface of the insulating substrate. The identification unit has N constituent elements and two connecting elements, each of the N constituent elements having a passive component electrical characteristic, wherein one connecting element is connected to one end of each constituent element, and the other connecting element and the other end of each constituent element connection. The total electrical characteristics of one of the N constituent elements and the two connected elements determine the identification code of one of the test strips.

According to still another aspect of the present invention, a biochemical sensing system is provided The system includes a test strip and a measuring device. The test strip has an insulating substrate, an electrode group disposed on the insulating substrate, and an identification unit disposed on one surface of the insulating substrate. The measuring device has a micro processing unit and a connector, wherein the connector is coupled to the identification unit to receive one of the identification codes represented by the identification unit, and the micro processing unit is coupled to the connector to receive the connection Signal of the device. The identification unit has N constituent elements and two connecting elements, each of the N constituent elements having a passive component electrical characteristic, wherein one connecting element is connected to one end of each constituent element, and the other connecting element and the other end of each constituent element connection.

According to another aspect of the present invention, a measuring device is provided. The measuring device is used for matching with a detecting test piece, wherein the detecting test piece has an insulating substrate, an electrode group disposed on the insulating substrate, and an identification unit disposed on one surface of the insulating substrate. The identification unit has N constituent elements and two connecting elements, each of the N constituent elements having a passive component electrical characteristic, wherein one connecting element is connected to one end of each constituent element, and the other connecting element and the other end of each constituent element connection. The measuring device comprises a connector and a micro processing unit. The connector includes at least a connection terminal corresponding to the identification unit, and the connection terminal is electrically coupled to the identification unit to receive a signal of one of the identification codes represented by the identification unit. A microprocessing unit is coupled to the connector to receive signals from the connector. The total electrical characteristics of one of the N constituent elements and the two connecting elements determine the identification code.

In one embodiment, an open circuit structure is formed between at least one of the N constituent elements and the two connection elements, and the electrode group includes one working electrode and one reference electrode insulated from each other. In another embodiment, the electrode set includes a working electrode, a reference electrode, and a sensing electrode that are insulated from each other. In another embodiment, the electrode group includes a working electrode, a reference electrode, a sensing electrode, and two detecting units, wherein one of the two detecting units is respectively connected to the reference electrode and the two connecting elements. one. .

Other aspects of the invention will be set forth in part in the description which follows. The various aspects of the invention can be understood and attained by the elements and combinations particularly pointed out in the appended claims. It is to be understood that the foregoing general description and the claims

The invention discloses a biochemical sensing system, a measuring device and a detecting test piece which can be identified or corrected without using a password card, which can eliminate the process of the password card, is convenient to operate, prevent forgetting to insert the password card or insert the wrong password card. Such errors can reduce the possibility of mistakes during use. To make the description of the present invention more detailed and complete, reference is made to the following description in conjunction with the drawings of FIGS. 1 through 6, wherein like reference numerals represent like elements. The apparatus, components and program steps described in the following examples are merely illustrative of the invention and are not intended to Limit the scope of the invention.

1 shows a test strip 100 according to an embodiment of the present invention, and FIG. 2 shows an exploded view of the test strip 100, and the corresponding relationship of each element is shown by a broken line. The test strip 100 of the present invention comprises an insulating substrate 110, a conductive layer 120, an insulating mat high layer 130, and an upper cover 150. The conductive layer 120 includes an electrode group 122 and an identification unit 127. The identification unit 127 includes a component group 128 and a connection component group 129. In this embodiment, the constituent element group 128 includes five constituent elements 128a, 128b, 128c, 128d, and 128e, and the coupling element group 129 includes two coupling elements 129a and 129b. The connecting member 129a is connected to one end of each constituent element, and the connecting member 129b is connected to the other end of each constituent element, as shown in FIG. In this embodiment, the electrode group 122 includes one working electrode 123 and one reference electrode 124 insulated from each other.

The present invention does not limit the number and shape of the constituent elements included in the identification unit 127, and the identification unit 127 may be disposed on any surface of the insulating substrate 110, and is not limited to the same surface as the electrode group 122. In general, the constituent element group 128 includes at least one hole partially or completely penetrating through the insulating substrate 110 (such as the element H in FIG. 2) on one of the constituent elements such that an open circuit is formed between the constituent element and the connecting element group 129. structure. In the present embodiment, the hole H completely penetrates the insulating substrate 110, and the through hole h1 on the insulating substrate 110, the through hole h2 in the conductive layer 120, and the through hole h3 on the upper layer 130 of the insulating pad. Composition. By controlling the number and position of the holes, the electrical characteristics of the identification unit 127 (e.g., the impedance values between the two connecting elements 129a and 129b) can be changed, and the test strip 100 can be discriminated accordingly.

The insulating substrate 110 has electrical insulation, and the material thereof may include, but is not limited to, polyvinyl chloride (PVC), glass fiber (FR-4), polyester, bakelite, polyethylene terephthalate. Ester (PET), polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), ceramics, and the like.

The material of the conductive layer 120 may be any conductive material such as carbon glue, gold silver glue, copper glue, carbon silver mixed glue, or the like and combinations thereof. In one embodiment, the conductive layer 120 is composed of a conductive silver paste layer and a conductive carbon powder layer disposed on the conductive silver paste layer. Generally, the conductive carbon powder layer has a much greater impedance than the conductive silver paste layer. Or other metal glue layer. The identification unit 127 can be matched with the conductive carbon powder layer by the conductive silver glue layer to calculate the impedance value of each constituent element as the arrangement design of the test strip. Each of the constituent elements may have different lengths or widths to form resistors having different resistance values, and a channel structure may be selectively formed between the constituent elements and the two connection elements or an open structure may be formed by the holes. In general, when N constituent elements each have different impedance values and match different hole numbers and positions, 2N impedance values can be combined. When the test strip 100 is placed in a measuring device, the measuring device can distinguish the detecting test piece 100 according to the impedance value between the two connecting elements, and can also adopt the corresponding correcting parameter. The number or mode is measured. It is to be noted that the constituent element 128 of the present invention is not limited to the resistor.

The present invention does not limit the arrangement of the working electrode 123, the reference electrode 124, and the identification unit 127, nor does it limit the number of electrodes. Other electrodes may be added as needed for practical applications. In general, it suffices that the electrodes and the identification unit are insulated from each other.

The insulating pad high layer 130 is placed over the conductive layer 120, and the insulating pad high layer 130 includes an opening 132a to expose a portion of the conductive layer 120. In general, the opening 132a is sufficient as long as it can expose a portion of the working electrode 123 and a portion of the reference electrode 124, and the present invention does not limit the shape of the opening 132a. In addition, the design of the upper layer 130 of the insulating pad also exposes another portion of the conductive layer 120 such that the conductive layer 120 can be electrically connected to a measuring device (630 of FIG. 6). The material of the insulating mat high layer 130 may include, but is not limited to, PVC insulating tape, PET insulating tape, heat drying type insulating varnish or ultraviolet curing type insulating varnish.

The upper cover 150 is placed over the upper layer 130 of the insulating mat and covers the opening 132a. The portion between the insulating substrate 110 and the upper cover 150 forms a sampling space having a capillary attraction (i.e., the reaction zone 132). When the area of the sampling space is fixed, its volume may depend on the thickness of the upper layer 130 of the insulating mat. In general, the thickness of the upper layer 130 of the insulating mat is between about 0.005 mm and about 0.3 mm, although not limited thereto. In addition, the upper layer 130 of the insulating mat that has been cut out of the opening 132a may be placed in the manufacturing process. The insulating substrate 110 and the conductive layer 120 can also be printed in a manner avoiding the opening 132a and the region for electrically contacting the measuring device, and directly forming the insulating pad 110 on the portion of the insulating substrate 110 and the conductive layer 120. on.

The test strip 100 of the present invention further comprises a reaction layer 140 disposed in the opening 132a, which has the ability to uniquely identify the biological material or signal, wherein the material of the reaction layer 140 varies from sample to sample, for example, A oxidoreductase or an electron vehicle (such as a ferrous material) is used to chemically react with the sample. In general, the reaction layer 140 covers at least a portion of the reference electrode 124 and the working electrode 123.

The upper cover 150 of the present invention may be a transparent or translucent material to facilitate observation of whether the reaction zone 132 has been filled with the sample, and to prevent the sample from being detected before it is filled, resulting in erroneous results. The lower surface of the upper cover 150 adjacent to the reaction zone 132 may be coated with a hydrophilic material to enhance the capillary action of the inner wall surface of the reaction zone 132 for more rapid and efficient introduction of the sample into the reaction zone 132. The upper cover 150 further includes a venting opening 153 corresponding to the end of the opening 132a for discharging the gas in the reaction zone 132 to enhance capillary action. Generally, the venting opening 153 is adjacent to the end of the opening 132a. The present invention does not limit the shape of the vent 153. For example, the vent 153 may be circular, elliptical, rectangular, diamond-shaped or the like.

3, 4, 5A, and 5B are different according to the present invention. The test strips 300, 400, 500a, and 500b shown in the example should be noted that the high-rise and upper covers of the insulating mat are not shown for convenience of explanation. Referring to FIG. 3, the test strip 300 includes an insulating substrate 310, and a working electrode 323, a reference electrode 324, a sensing electrode 325, two detecting units 326, and an identifying unit 327, wherein the detecting unit 327 is insulated from each other. The constituent element group 328 and the connecting element group 329 are included. In this embodiment, the constituent element group 328 includes five constituent elements 328a, 328b, 328c, 328d, and 328e, and the coupling element group 329 includes the coupling members 329a and 329b, wherein the two ends of the respective constituent elements are respectively coupled to the connecting member 329a. And 329b are connected to form a parallel connection. The test strip 300 also includes two holes P1 and P2 on the constituent elements 328a and 328d such that the constituent elements 328a, 328d and the joining element group 329 form an open circuit structure, respectively. When the test strip 300 is electrically connected to a measuring device (such as the measuring device 630 shown in FIG. 6), the constituent elements 328b, 328c, and 328e can respectively form three electrical circuits, and the constituent elements 328a, 328d is respectively disconnected, so the measuring device will measure the total electrical characteristics (such as a total equivalent impedance value) of the loop formed by the constituent elements 328b, 328c, and 328e through the connecting element group 329, and thereby identify The test piece 300 is tested.

In the embodiment shown in FIG. 3, the sensing electrode 325 is a U-shaped electrode that is electrically insulated from the working electrode 323 and the reference electrode 324. The sensing electrode 325 is disposed between the working electrode 323 and the reference electrode 324 for sensing the electrical connection between the detecting test strip 300 and a measuring device (such as the measuring device 630 shown in FIG. 6). Generally speaking, sensing electricity The pole 325 system generates a signal through a loop to achieve the specified power-on effect. For example, after the test strip 300 is placed in the measuring device, the sensing electrode 325 can form a loop with the measuring device to activate the measuring device.

The primary function of detection unit 326 is to confirm that the sample has properly covered reaction zone 332. Generally, the detecting unit 326 is disposed corresponding to the bottom of the reaction zone 332 such that when a liquid sample is injected into the reaction zone 332, the reference electrode 324, the working electrode 323, and the detecting unit 326 are sequentially contacted. Once the sample reaches the two detection units 326 at the bottom of the reaction zone, the sample can be used as an electrical connection between the two detection units 326, and the impedance value between them becomes smaller. The detecting unit 326 can achieve multiple detection functions on a small-area substrate by coupling with other electrodes or electrical structures on the substrate. In this embodiment, one ends of the two detecting units 326 are respectively connected to the reference electrode 324 and the connecting element 329a. In this manner, the measuring device can provide a voltage between the reference electrode 324 and the connecting member 329a. Once the sample reaches the detecting unit 326 at the bottom of the reaction region 332, sufficient current can flow between the reference electrode 324 and the connecting member 329a. It is confirmed that the sample has appropriately covered the reaction zone 332. In other embodiments, one end of the two detecting units 326 can be respectively connected to other electrodes, for example, respectively connected to the working electrode 323 and the connecting element 329b.

Referring to FIG. 4, the test strip 400 includes an insulating substrate 410, and one of the working electrodes 423, a reference electrode 424, and two The detecting unit 426 and the identifying unit 427, wherein the identifying unit 427 comprises constituent elements 428a, 428b, 428c and connecting elements 429a, 429b, and the two ends of the respective constituent elements are respectively connected to the connecting elements 429a and 429b. One ends of the two detecting units 426 are respectively connected to the reference electrode 424 and the connecting member 429a to confirm whether the sample has properly covered the reaction area 432. In other embodiments, one or both of the detection units 426 can be a separate electrode and insulated from the other electrodes. The test strip 400 also includes two holes P1 and P2 on the constituent elements 428a and 428c to form an open structure between the constituent elements 428a and 428c and the connecting member 429. The holes P1 and P2 may be through holes penetrating the insulating substrate 410 or grooves not penetrating the insulating substrate 410. In this embodiment, the constituent elements are formed of conductive carbon powders of different lengths and shapes to produce constituent elements having different impedance values. Generally, the impedance value of the constituent elements can be adjusted by the length or width of the conductive carbon powder, and further, can be adjusted with other metal glue layers such as a silver glue layer.

In FIG. 5A, the test strip 500a has a hole P1 on a constituent element for breaking an electrical loop between the constituent element and the connecting element, and the breaking manner can be achieved by partially or completely completing the insulating substrate. In Fig. 5B, the test strip 500b has two holes P1 and P2 on two different constituent elements. Therefore, the identification unit 527a of the test strip 500a and the identification unit 527b of the test strip 500b will have different electrical characteristics, whereby the test strips 500a and 500b can be discriminated. For example, when the test strip 500a or 500b is placed in an amount When the device is tested, the measuring device can identify the test strips 500a and 500b by receiving signals corresponding to the electrical characteristics of the identification unit 527a or 527b, and then perform corresponding measurement parameters or modes for measurement.

In other embodiments of the invention, different locations of the working or measuring electrodes may be designated to initiate the sensing device or other sensing function. For example, referring to FIGS. 5A and 5B, two detection points S1, S2 are provided at the detection end of the reference electrode 524a or 524b (which will be connected to the end point of the measuring device), wherein the detection point S2 can be used to ground, when two When the detection points S1 and S2 are connected to the measuring device to form an electrical circuit, the starting measuring device is designated.

The present invention does not limit the number of constituent elements. It should also be understood that the number, shape, and electrical properties of the constituent elements can be set by the designer according to the actual application, wherein each of the constituent elements can selectively break the connecting member with the hole. Electrical connections between the groups whereby a plurality of different equivalent impedance values can be formed. In other words, when there are N constituent elements, at most 2N identification codes can be combined. That is, by selectively destroying each constituent element and matching the impedance of each constituent element, a plurality of unique identification codes can be combined. The identification unit can be used to indicate test strips of different functions or test strips of different batches. The method of breaking the constituent element loop may be a through hole penetrating the insulating substrate or a groove not penetrating the insulating substrate. The invention also does not limit the shape and size of the grooves or through holes. It should be noted that the N constituent elements of the present invention can be various passive components, such as resistors, inductors, Or capacitors, etc.

FIG. 6 is a block diagram of a biochemical sensing system 600 including a test strip 300 and a measuring device 630 according to an embodiment of the invention. The test strip 300 includes a working electrode 323, a reference electrode 324, a sensing electrode 325, two detecting units 326, an identifying unit 327, and two holes P1, P2, wherein the identifying unit 327 includes a constituent element 328a, 328b, 328c, 328d, 328e and joining elements 329a, 329b, and holes P1 and P2 are located on constituent elements 328a and 328d, respectively, as described in FIG. The connecting elements 329a, 329b of the present invention provide a means for electrically connecting the respective constituent elements 328a, 328b, 328c, 328d, 328e to the metrology device 630.

The measuring device 630 includes a connector 640 and a micro processing unit 650 coupled to the connector 640. The micro processing unit 650 has a digital data 655 built therein, which may be, for example, a calibration parameter, a detection mode, or other information. The connector 640 has a connection terminal corresponding to each electrode and the identification unit 327. The working electrode 323, the reference electrode 324, the sensing electrode 325, the detecting unit 326, and the identification unit 327 pass through a phase between the connection terminal and the connector 640. It is electrically connected to the measuring device 630.

When the test strip 300 is connected to the connector 640, a loop is formed between the sense electrode 325 and the connector 640, and the micro-processing unit 650 activates the measuring device 630. In addition, due to multiple identification units 327 The constituent elements have different states, and thus the connection to the connector 640 will have a different form, whereby a signal corresponding to the identification code represented by the identification unit 327 is generated to the micro processing unit 650. For example, when the test strip 300 is electrically connected to the measuring device 630, the constituent elements 328a and 328d cannot be electrically connected to the connector 640, and only the constituent elements 328b, 328c, and 328e can form an electrical loop. The connector 640 can receive a signal corresponding to the electrical characteristic through the connecting elements 329a and 329b and transmit the signal to the microprocessor 650. The microprocessor unit 650 can then identify based on the signal and select a parameter or mode corresponding to the signal from the data 655 to perform. The measurement device 630 further includes a display 660 for displaying various measurements, and a power source 670 for providing the required power. In another embodiment, display 660 and power source 670 can be external devices and are not included in measurement device 630.

Briefly, the identification unit of the present invention is for identifying and specifying data built in the measuring device, wherein the measuring device has a built-in complex array corresponding to the calibration parameter of the identification code represented by the identification unit on the test strip, and detection. Mode, or other information. The biochemical sensing system disclosed by the invention not only achieves the purpose of not requiring a password card, but also reduces the manufacturing cost of the password card, improves the convenience of detection, and avoids the loss of human operation.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not included in the spirit of the present invention should be included. It is within the scope of the following patent application.

100‧‧‧Test strips

110‧‧‧Insert substrate

120‧‧‧ Conductive layer

122‧‧‧electrode group

123‧‧‧Working electrode

124‧‧‧ reference electrode

127‧‧‧ Identification unit

128‧‧‧Component component group

128a, 128b, 128c, 128d, 128e‧‧‧ components

129‧‧‧Link component group

129a, 129b‧‧‧ link components

130‧‧‧Insulation pad high-rise

132‧‧‧Reaction zone

132a‧‧‧ openings

140‧‧‧Reaction

150‧‧‧上盖

153‧‧‧Ventinel

300‧‧‧Test strips

310‧‧‧Insert substrate

323‧‧‧Working electrode

324‧‧‧ reference electrode

325‧‧‧Sensor electrode

326‧‧‧Detection unit

327‧‧‧ Identification unit

328‧‧‧Component component group

328a, 328b, 328c, 328d, 328e‧‧‧ components

329‧‧‧Link component group

329a, 329b‧‧‧ link components

332‧‧‧Reaction zone

400‧‧‧Test strips

410‧‧‧Insert substrate

423‧‧‧Working electrode

424‧‧‧ reference electrode

426‧‧‧Detection unit

427‧‧‧ Identification unit

428a, 428b, 428c‧‧‧ components

429a, 429b‧‧‧ link components

432‧‧‧Reaction zone

500a, 500b‧‧‧ test strips

524a, 524b‧‧‧ reference electrode

527a, 527b‧‧‧ identification unit

600‧‧‧Biochemical sensing system

630‧‧‧Measurement device

640‧‧‧Connector

650‧‧‧Microprocessing unit

655‧‧‧ digital data

660‧‧‧ display

670‧‧‧Power supply

H, h1, h2, h3‧‧‧ through holes

P1, P2‧‧‧ holes

S1, S2‧‧‧ inspection points

1 is a test strip of an embodiment of the present invention; FIG. 2 is a structural exploded view of the test strip of FIG. 1; FIG. 3 and FIG. 4 are diagrams of a test strip according to various embodiments of the present invention; 5A and FIG. 5B respectively illustrate different embodiments of a test strip having a sensing function; and FIG. 6 is a block diagram showing a biochemical sensing system according to an embodiment of the invention.

100‧‧‧Test strips

110‧‧‧Insert substrate

120‧‧‧ Conductive layer

122‧‧‧electrode group

123‧‧‧Working electrode

124‧‧‧ reference electrode

127‧‧‧ Identification unit

128‧‧‧Component component group

128a, 128b, 128c, 128d, 128e‧‧‧ components

129‧‧‧Link component group

129a, 129b‧‧‧ link components

130‧‧‧Insulation pad high-rise

132‧‧‧Reaction zone

132a‧‧‧ openings

140‧‧‧Reaction

150‧‧‧上盖

153‧‧‧Ventinel

Claims (23)

A test piece comprising: an insulating substrate; an electrode group disposed on the insulating substrate; and an identification unit disposed on a surface of the insulating substrate; wherein the identification unit has N constituent elements and two connections An element, each of the N constituent elements having a passive component electrical feature, wherein one of the connecting elements is connected to one end of each of the constituent elements, and the other connecting element is connected to the other end of each of the constituent elements, wherein the N constituent elements And a total electrical characteristic of the two connecting elements determines an identification code of the detecting test piece; wherein at least one of the N constituent elements forms an open circuit structure with the two connecting elements; The constituent element of the open circuit structure includes a first and a second resistor, and one ends of the first and second resistors are respectively connected to the two connecting elements, and the other ends of the first and second resistors are connected to each other Separation. The test strip of claim 1, wherein each of the N constituent elements comprises a resistor. The test strip of claim 2, wherein the resistors having different resistance values among the N constituent elements have different lengths or widths. The test strip of claim 2, wherein the resistors of each of the N constituent elements have different resistance values. The test strip according to claim 1, wherein the N constituent elements combine 2N identification codes. The test strip of claim 1, wherein the first and the second resistors are separated from each other by a hole in the insulating substrate. The test strip according to claim 6, wherein the hole is a through hole penetrating through the insulating substrate or a groove not penetrating through the insulating substrate. The test strip of claim 1, wherein the electrode set is disposed on the surface of the insulating substrate. The test strip according to claim 1, wherein the material of the electrode group is selected from the group consisting of carbon glue, silver glue, copper glue, gold and silver mixed glue, carbon silver mixed glue, and a mixture thereof. The test strip of claim 1, further comprising: a high-rise insulating layer covering a portion of the electrode group, wherein a portion of the electrode group not covered by the upper layer of the insulating pad forms a reaction region having an open end; And an upper cover placed on the upper layer of the insulating mat and covering the reaction The upper cover has a vent corresponding to one of the reaction zones. The test strip of claim 10 further comprising a reaction layer disposed in the reaction zone for reacting with a liquid sample. The test strip of claim 11, wherein the electrode set comprises a working electrode and a reference electrode insulated from each other, and the reactive layer covers a portion of the working electrode and the reference electrode. The test strip of claim 12, wherein the electrode set further comprises a sensing electrode, the sensing electrode, the working electrode, and the reference electrode are insulated from each other. The detecting test piece of claim 12 further includes two detecting units, one of the two detecting units being respectively connected to the reference electrode and one of the two connecting elements, the two detecting units The other ends are separated from each other, wherein the two detecting units are disposed on the insulating substrate corresponding to the bottom of the reaction zone. A biochemical sensing system comprising: a test strip having an insulating substrate, an electrode set disposed on the insulating substrate, and an identification unit disposed on a surface of the insulating substrate; and a measuring device having a micro processing unit and a connection The connector is coupled to the identification unit to receive a signal of one of the identification codes represented by the identification unit, and the micro processing unit is coupled to the connector to receive the signal from the connector; The identification unit has N constituent elements and two connecting elements, each of the N constituent elements having a passive component electrical characteristic, wherein one connecting element is connected to one end of each of the constituent elements, and the other connecting element and each of the connecting elements The other end of the constituent element is connected; wherein at least one of the N constituent elements forms an open circuit structure with the two connecting elements; and the constituent element forming the open circuit structure includes a first and a second resistor, One ends of the first and second resistors are respectively connected to the two connecting elements, and the other ends of the first and second resistors are separated from each other. The biochemical sensing system of claim 15, wherein the total electrical characteristics of the N constituent elements and the two connecting elements determine the identification code. The biochemical sensing system of claim 15, wherein the micro processing unit has built-in complex array correction parameters, and the micro processing unit selects one of the correction parameters to correct the biochemical sensing system according to the received signal. The biochemical sensing system of claim 15, wherein the microprocessing The unit has a plurality of modes built in, and the micro processing unit selects one of the modes to execute according to the received signal. The biochemical sensing system of claim 15, wherein the micro processing unit identifies the test strip based on the received signal. The biochemical sensing system of claim 15, wherein each of the N constituent elements comprises a resistor. The biochemical sensing system of claim 20, wherein the first and the second resistors are separated from one another by a hole in the insulating substrate. The biochemical sensing system of claim 21, wherein the hole is a through hole extending through the insulating substrate or a groove not penetrating the insulating substrate. A measuring device for use with a detecting test piece, wherein the detecting test piece has an insulating substrate, an electrode group disposed on the insulating substrate, and an identification unit disposed on a surface of the insulating substrate, The identification unit has N constituent elements and two connecting elements, each of the N constituent elements having a passive component electrical characteristic, wherein one connecting element is connected to one end of each of the constituent elements, and the other connecting element and each of the constituent elements Connected at the other end, the measuring device comprises: a connector comprising at least a connection terminal corresponding to the identification unit, the connection terminal being electrically coupled to the identification unit to receive a signal of one of the identification codes represented by the identification unit; and a micro processing unit coupled to the a connector for receiving the signal from the connector; wherein a total electrical characteristic of the N constituent elements and the two connecting elements determines the identification code; wherein at least one of the N constituent elements and the second Forming an open circuit structure between the connecting elements; and the constituent element forming the open circuit structure includes a first and a second resistor, and one of the first and second resistors is respectively connected to the two connecting elements, and The other ends of the first and second resistors are separated from each other.