CN218545959U - Push type film pressure sensor - Google Patents

Abstract

The utility model discloses a push type film pressure sensor, which belongs to the field of pressure detection and comprises two substrates which are arranged in a stacked manner, wherein the substrates are made of flexible materials, the inner side surfaces of the two substrates are respectively provided with a longitudinal sensing strip and a transverse sensing strip, and the longitudinal sensing strip and the transverse sensing strip are formed by printing sensing piezoresistive ink; the longitudinal induction strips and the transverse induction strips are arranged in a plurality and are respectively distributed in a row at intervals, and the longitudinal induction strips and the transverse induction strips are mutually vertical, so that a plurality of mutually overlapped measuring points are formed by the longitudinal induction strips and the transverse induction strips; the outer side surface of one of the substrates is provided with metal contacts the number of which is the same as that of the measuring points, and each metal contact is electrically connected with each measuring point through a lead. The utility model discloses not only be applicable to narrow and cambered surface scene, can also stably and accurately transmit resistance signal.

Description

Push type film pressure sensor

Technical Field

The utility model relates to a pressure detection technical field, in particular to push type film pressure sensor.

Background

The pressure test is an important research object in the industries of biomedicine, human engineering, automobile manufacturing, mechanical automation and the like. The accurate, real-time and scientific pressure testing means can effectively improve the research and development level of enterprises, reduce the trial and error cost of scientific research, accurately position the defects of products and improve the product design by assistance. The traditional pressure testing method based on indirect pressure testing means leads to the fact that the measured pressure is vertical and often does not accord with the actual situation, data deviation between theoretical calculation and the actual situation is caused, and data support cannot be effectively provided for product improvement.

For the pressure test condition that the contact surface is narrow or the contact surface has a certain radian, the prior art mainly faces the following difficulties: at present, all conventional pressure test sensors are rigid sensors, the hardness of the sensors is high, and the rigid sensors can influence the stress condition; and the conventional pressure sensor has larger thickness which is more than 2mm on average, and can not meet the test in a narrow environment.

There are also plug-in type membrane pressure distribution sensors on the market, but the connection is easy to be disconnected, and the connection part is exposed, so that the connection part is easy to be interfered by signals, and the pressure test result is influenced.

SUMMERY OF THE UTILITY MODEL

Pressure sensor to prior art existence can not be applicable to the problem of narrow and cambered surface scene, the utility model aims to provide a push type film pressure sensor.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a push type film pressure sensor comprises two substrates which are arranged in a stacked mode, wherein the substrates are made of flexible materials, the inner side faces of the two substrates are respectively provided with a longitudinal sensing strip and a transverse sensing strip, and the longitudinal sensing strip and the transverse sensing strip are formed by printing sensing piezoresistive ink; the longitudinal induction strips and the transverse induction strips are arranged in a row at intervals, and are mutually perpendicular to each other, so that a plurality of mutually overlapped measuring points are formed by the longitudinal induction strips and the transverse induction strips; the outer side surface of one of the substrates is provided with metal contacts the number of which is the same as that of the measuring points, and each metal contact is electrically connected with each measuring point through a lead.

Furthermore, the device also comprises a connecting clamp, wherein the connecting clamp comprises two clamping arms which are in pivot connection with each other and a return spring connected between the two clamping arms, one of the two clamping arms is provided with a connecting contact matched with the metal contact, and the number and the arrangement mode of the connecting contacts are the same as those of the metal contact.

Preferably, the metal contact is convex, and the connection contact is concave.

Preferably, the metal contact is hemispherical, and the connection contact is hemispherical.

Preferably, the substrate provided with the metal contacts is provided with a plurality of threading holes respectively opposite to the measuring points.

Preferably, the wire is embedded in the substrate, and two ends of the wire respectively extend out of the inner side wall and the outer side wall of the substrate.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: due to the arrangement of the substrate made of the flexible material and the longitudinal sensing strips and the transverse sensing strips printed on the inner side walls of the two substrates respectively, when the outer side surfaces of the substrates are stressed, the measuring points opposite to the pressure action positions are pressure sensor points, the resistance of the pressure sensor points linearly changes along with the change of the pressure, the resistance is linearly reduced infinitely, standard resistance signals are output to the metal contacts, and the metal contacts transmit the resistance signals outwards, so that the pressure sensor is suitable for pressure measurement of narrow and arc surfaces; due to the arrangement of the connecting clamp, the connecting clamp can be quickly and conveniently connected with the film pressure sensor in a clamping mode, resistance signals can be transmitted to the connecting clamp from the metal contacts by means of the arrangement of the connecting contacts on the clamping arm, and the connecting clamp 5 transmits the resistance signals out, so that the mounting stability and the signal transmission accuracy are effectively improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a substrate provided with metal contacts according to the present invention;

FIG. 3 is a schematic structural view of a substrate with longitudinal sensor strips according to the present invention;

FIG. 4 is a schematic structural view of a substrate with transverse sensor strips according to the present invention;

fig. 5 is a schematic diagram of the interlacing of the longitudinal sensor bars and the transverse sensor bars.

In the figure, 1-substrate, 2-longitudinal induction strip, 3-transverse induction strip, 4-metal contact, 5-connecting clamp, 51-clamping arm and 52-pivot.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.

A push-on film pressure sensor, as shown in fig. 1-5, comprises two substrates 1 arranged one above the other, the substrates 1 being for example of flexible sheet-like construction made of polyurethane material, such as a film or a soft sheet, so as to be suitable for use in narrow areas or to be attached to an arc-shaped surface.

As shown in fig. 3-5, the inner side surfaces (opposite side surfaces) of the two substrates 1 are respectively provided with a longitudinal sensing strip 2 and a transverse sensing strip 3, and the longitudinal sensing strip 2 and the transverse sensing strip 3 are formed by printing sensing piezoresistive ink. Moreover, a plurality of longitudinal sensing bars 2 are printed, and the plurality of longitudinal sensing bars 2 are distributed in a row at intervals, for example, at equal intervals. Similarly, a plurality of transverse sensor strips 3 are printed, and a plurality of transverse sensor strips 3 are also distributed in a row at intervals, for example, at equal intervals. The distance between the longitudinal induction strips 2 is the same as that between the transverse induction strips 3, and meanwhile, the longitudinal induction strips 2 are perpendicular to the transverse induction strips 3, so that when the two substrates 1 are mutually attached, the longitudinal induction strips 2 and the transverse induction strips 3 form rows of mutually overlapped measuring points which are distributed in a matrix shape.

In this embodiment, as shown in fig. 1 and fig. 2, a plurality of metal contacts 4, such as copper, are further disposed on the outer side surface of any one of the substrates 1, and the number of the metal contacts 4 is the same as the number of the measuring points. And, each metal contact 4 is electrically connected with each measuring point in a one-to-one correspondence manner through a lead. In this embodiment, the conductive wires are embedded in the substrate 1, that is, a required number of conductive wires are fused into the substrate 1 when the substrate 1 is manufactured, and two ends of the conductive wires respectively extend out from the inner side wall and the outer side wall of the substrate 1, so that two ends of the conductive wires are respectively connected with the measuring point on one side of the inner side wall of the substrate 1 and the metal contact 4 on one side of the outer side wall of the substrate 1. Or in other preferred embodiments, the conducting wire is exposed, that is, a plurality of threading holes respectively opposite to the measuring points are formed on the substrate 1 provided with the metal contact 4, and after one end of the conducting wire is connected with the metal contact 4, the other end of the conducting wire is connected to the corresponding measuring point through the threading hole.

It will be understood that the substrate 1 generally has a certain length, one end of which is used for arranging the longitudinal sensing strips 2 and the transverse sensing strips 3, and the other end of which is used for arranging the metal contacts 4, so as to avoid pressing the metal contacts 4 at the same time when performing pressure detection, for example, in the embodiment, the substrate 1 is configured to have a T-shaped configuration, the measuring point formed by the longitudinal sensing strips 2 and the transverse sensing strips 3 in a staggered manner is located at one end of the T-shaped configuration, and the metal contacts 4 are located at the other end of the T-shaped configuration.

In this embodiment, as shown in fig. 1, the connecting clip 5 further includes a connecting clip 5, the connecting clip 5 includes two clamping arms 51, the two clamping arms 51 are both pivotally connected to a same pivot 52, the clamping arms 51 include a clamping portion located at a front side of the pivot and an operating portion located at a rear side of the pivot, and a return spring, such as a torsion spring, is further connected between the two clamping arms 51, the torsion spring is sleeved on the pivot 52, and two ends of the torsion spring are respectively connected to the two clamping arms 51. During the use, make both be close to each other through exerting pressure to the operation portion to overcome the elasticity of torsional spring and make two clamping parts keep away from each other, on the contrary after external force disappears, thereby the torsional spring resets and drives two clamping parts and be close to each other, realizes the centre gripping operation. In the present embodiment, one of the clamping arms (specifically, the inner sidewall of the clamping portion) is provided with connecting contacts (not shown) adapted to the metal contacts 4, and the number and arrangement of the connecting contacts are the same as those of the metal contacts 4. For example, the metal contact 4 is convex and the connection contact is concave, so that the connection clip 5 is not easily detached, and in the present embodiment, the metal contact 4 is further arranged to be hemispherical and the connection contact is arranged to be hemispherical.

The utility model discloses a theory of operation does: when the outer side surface of the substrate 1 is stressed, a measuring point opposite to the pressure action position is a pressure sensor point, the resistance of the pressure sensor point linearly changes along with the change of the pressure, the resistance is infinitely linearly reduced, a standard resistance signal is output to the metal contact 4, the metal contact 4 transmits the resistance signal to a connecting contact on the connecting clamp 5, the connecting clamp 5 transmits the resistance signal, and the connecting clamp 5 and the substrate 1 are connected in a clamping mode, so that the mounting stability and accuracy are effectively improved. Because the measuring points at different positions correspond to different metal contacts 4, the pressed position of the substrate 1 can be known according to the resistance signal fed back by each metal contact 4, so that each position of the substrate 1 can be separated by coordinates, and the detection is convenient.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and these embodiments are still within the scope of the invention.

Claims (6)

1. The utility model provides a push type film pressure sensor which characterized in that: the sensor comprises two substrates which are arranged in a stacked mode, wherein the substrates are made of flexible materials, the inner side surfaces of the two substrates are respectively provided with a longitudinal sensing strip and a transverse sensing strip, and the longitudinal sensing strip and the transverse sensing strip are both formed by printing sensing piezoresistive ink; the longitudinal induction strips and the transverse induction strips are arranged in a plurality and are respectively distributed in a row at intervals, and the longitudinal induction strips and the transverse induction strips are mutually vertical, so that a plurality of mutually overlapped measuring points are formed by the longitudinal induction strips and the transverse induction strips; the outer side surface of one of the substrates is provided with metal contacts the number of which is the same as that of the measuring points, and each metal contact is electrically connected with each measuring point through a lead.

2. The push type film pressure sensor of claim 1, wherein: still include the connecting clamp, the connecting clamp includes two centre gripping arms of mutual pivotal connection and connects two reset spring between the centre gripping arm, one of them be provided with on the centre gripping arm with the connection contact of metal contact looks adaptation, just the quantity and the arrangement of connection contact all with the metal contact is the same.

3. The push type film pressure sensor according to claim 2, wherein: the metal contact is convex, and the connection contact is concave.

4. The push type film pressure sensor of claim 3, wherein: the metal contact is hemispherical, and the connecting contact is hemispherical.

5. The push type film pressure sensor of claim 1, wherein: the base provided with the metal contacts is provided with a plurality of threading holes which are respectively opposite to the measuring points.

6. The push type film pressure sensor of claim 1, wherein: the wire is pre-buried in the basement, and the both ends of wire are stretched out respectively from the inside wall and the lateral wall of basement.

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