CN109946003B - Sensor and control method of sensor - Google Patents
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- CN109946003B CN109946003B CN201910338517.4A CN201910338517A CN109946003B CN 109946003 B CN109946003 B CN 109946003B CN 201910338517 A CN201910338517 A CN 201910338517A CN 109946003 B CN109946003 B CN 109946003B
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Abstract
The invention discloses a sensor and a control method of the sensor, wherein the sensor comprises: a carrying plate; the shell is covered on the bearing plate and is enclosed with the bearing plate to form a containing cavity; the force-induced luminous material layer is arranged on the surface of the bearing plate facing the containing cavity; the excitation light source is arranged in the cavity and adjacent to the mechanoluminescence material layer, and the excitation light source is used for exciting the mechanoluminescence material layer. The technical scheme of the invention aims to improve the stability of the sensor.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a sensor and a control method of the sensor.
Background
The force-induced luminescence generally refers to luminescence phenomenon caused by mechanical force applied to a solid material, so that the force-induced luminescence material has wide application prospects in the aspects of pressure sensors, fracture sensors, impact sensors, structure monitoring sensors and the like. However, since the luminescence intensity of the mechanoluminescence material decays exponentially with the extension of the measurement time, the luminescence intensity generated by the mechanoluminescence material is weak after the long-time decay, and is difficult to be detected by an instrument, it is difficult to monitor the object to be measured for a long time in actual use.
Disclosure of Invention
The invention mainly aims to provide a sensor and a control method of the sensor, aiming at improving the stability of the sensor.
To achieve the above object, the present invention provides a sensor comprising:
a carrying plate;
the shell is covered on the bearing plate and is enclosed with the bearing plate to form a containing cavity;
the force-induced luminous material layer is arranged on the surface of the bearing plate facing the containing cavity;
the excitation light source is arranged in the cavity and adjacent to the mechanoluminescence material layer, and the excitation light source is used for exciting the mechanoluminescence material layer.
Further, the excitation light source is arranged on the inner surface of the side wall of the shell, and the distance between the excitation light source and the bearing plate is larger than the thickness of the force-induced luminescent material layer.
Further, a plurality of excitation light sources are arranged, and the excitation light sources are arranged at intervals along the circumferential direction of the accommodating cavity;
and/or the luminous wavelength of the excitation light source is ultraviolet light in the range of 300nm-400 nm.
Further, the thickness of the bearing plate is less than or equal to 2mm;
and/or the bearing plate is a resin plate or a metal plate.
Further, the sensor further comprises a separation plate arranged in the cavity, the separation plate is positioned on one side of the force-induced luminescent material layer, which is away from the bearing plate, and separates the cavity into a first cavity and a second cavity, and the force-induced luminescent material layer and the excitation light source are arranged in the first cavity.
Further, the cavity wall of the first cavity is a shading cavity wall.
Further, the sensor further comprises a signal acquisition device, wherein the signal acquisition device is arranged in the first cavity and is used for acquiring the optical signal emitted by the force-induced luminescent material layer;
further, the sensor further comprises a signal transmission device, wherein the signal transmission device is arranged in the second cavity and is electrically connected with the signal acquisition device, and the signal transmission device is used for enabling the sensor to be in data communication with external equipment;
further, the sensor further comprises a controller, wherein the controller is arranged in the second cavity and is electrically connected with the excitation light source, the signal acquisition device and the signal transmission device respectively.
The invention also provides a control method of the sensor, wherein the sensor comprises the following steps:
a carrying plate;
the shell is covered on the bearing plate and is enclosed with the bearing plate to form a containing cavity;
the force-induced luminous material layer is arranged on the surface of the bearing plate facing the containing cavity;
the excitation light source is arranged in the cavity and adjacent to the mechanoluminescence material layer, and the excitation light source is used for exciting the mechanoluminescence material layer;
the signal acquisition device is arranged in the containing cavity and is used for acquiring the light signals emitted by the mechanoluminescence material layer;
the signal transmission device is arranged in the accommodating cavity and is electrically connected with the signal acquisition device, and is used for enabling the sensor to be in data communication with external equipment;
the controller is arranged in the containing cavity and is respectively and electrically connected with the excitation light source, the signal acquisition device and the signal transmission device.
The control method of the sensor comprises the following steps:
identifying the working state of the signal acquisition device every interval for a first preset time length;
when the signal acquisition device is identified to not acquire signals, the signal acquisition device is controlled to be closed, and the excitation light source is controlled to be started so as to charge the forced luminous material layer for a second preset time length;
and when the energy charging is finished, controlling the signal acquisition device to be started, controlling the excitation light source to be closed, and returning to the step of identifying the working state of the signal acquisition device every interval for a first preset duration.
According to the technical scheme, the sensor is fixed on the surface of the monitored object, so that the bearing plate is contacted with the monitored object, and the tiny damage of the detected object surface can be effectively detected. The auxiliary excitation light source of the excitation light source excites the forced luminous material layer, so that the dynamic balance of fluorescence attenuation and energy supplement of the forced luminous material layer is achieved, the energy storage stability of the forced luminous material is improved, the stability of the sensor is further improved, and the sensor can stably detect a detected object for a long time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a sensor according to the present invention;
FIG. 2 is a flowchart of an embodiment of a method for controlling the sensor.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Sensor for detecting a position of a body | 30 | Layer of mechanoluminescence material |
| 10 | Bearing plate | 40 | Excitation light source |
| 20 | Outer casing | 50 | Partition plate |
| 21 | First chamber | 60 | Signal acquisition device |
| 22 | A second chamber | 70 | Controller for controlling a power supply |
| 23 | Heat dissipation hole | 80 | Signal transmission device |
| 24 | Outer edge |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the mechanical connection and the electrical connection can be adopted; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The present invention proposes a sensor 100.
Referring to fig. 1, the sensor 100 includes:
a carrier plate 10;
the shell 20 is covered on the bearing plate 10, and forms a containing cavity with the bearing plate 10;
the mechanoluminescence material layer 30, the mechanoluminescence material layer 30 is arranged on the surface of the bearing plate 10 facing the cavity;
the excitation light source 40 is disposed in the cavity and adjacent to the luminescent material layer 30, and the excitation light source 40 is used for exciting the luminescent material layer 30.
In this embodiment, the casing may be disposed in a prismatic shape, the casing 20 is bent adjacent to the carrier plate 10 to form an extension edge 24, the extension edge 24 abuts against the carrier plate 10, and the extension edge 24 and the carrier plate 10 are provided with mounting holes (not shown), and the casing 20 and the carrier plate 10 are connected to the surface of the object to be measured through fasteners and the mounting holes. Of course, the fixing to the surface of the object to be measured may be performed by other means, for example, by gluing. The mechanoluminescence material layer 30 is located on the housing 20 and the carrying plate 10 to form a cavity, which can isolate the mechanoluminescence material layer 30 from the external environment so as not to affect the monitoring effect.
The mechanoluminescence material is a material which stores energy by trapping transition electrons and generates afterglow by slowly releasing the trapped electrons. After the material has a special lattice structure, under the condition of stress, the electron release speed is accelerated through lattice distortion, so that the light-emitting brightness of the material is improved, and the stress light-emitting phenomenon is generated. Specifically, the sensor 100 is fixed on the surface of the monitored object, so that the carrier plate 10 contacts with the monitored object, and when the surface of the object is damaged, the luminescent material layer 30 emits light, so that partial micro damage on the surface of the object can be effectively monitored.
According to the technical scheme, the mechanoluminescence material layer 30 is excited by light emitted by the excitation light source 40, so that dynamic balance is achieved between fluorescence attenuation and energy supplement of the mechanoluminescence material layer 30, energy storage stability of the mechanoluminescence material is ensured, and further sensitivity and stability of monitoring of the sensor 100 are improved, and the sensor 100 can stably monitor a measured object for a long time.
Specifically, the excitation light source 40 is disposed on the inner surface of the sidewall of the housing 20, and the distance between the excitation light source 40 and the carrier plate 10 is greater than the thickness of the electroluminescent material layer 30.
In this embodiment, the excitation light source 40 is disposed on the inner surface of the sidewall of the housing 20, so that the light emitted therefrom can strike the layer of mechanoluminescence material 30. Specifically, the distance between the excitation light source 40 and the carrier plate 10 is greater than the thickness of the mechanoluminescence material layer 30, that is, the excitation light source 40 is located above the mechanoluminescence material layer 30, so that light emitted by the excitation light source 40 can better strike the mechanoluminescence material layer 30, thereby improving the light utilization rate and avoiding waste of resources.
Preferably, the plurality of excitation light sources 40 are provided, and the plurality of excitation light sources 40 are arranged at intervals along the circumferential direction of the cavity.
In this embodiment, the excitation light source 40 is provided in plurality, thereby enabling the layer of mechanoluminescence material 30 to be more rapidly supplied with energy. And the plurality of excitation light sources 40 are arranged at intervals along the circumferential direction of the cavity, so that the surface of the mechanoluminescence material layer 30 is uniformly irradiated by the excitation light sources 40.
Further, the emission wavelength of the excitation light source 40 is ultraviolet light in the range of 300nm to 400 nm.
The excitation light source 40 functions to excite the layer of mechanoluminescence material 30, preferably a light source matching the excitation spectrum of the mechanoluminescence material. In the present embodiment, the light emission wavelength of the excitation light source 40 is 300nm-400nm, and the ultraviolet light in this range makes electrons in the mechanoluminescence material layer 30 enter the trap level, and electrons in the trap level are released under the action of external force, so that the mechanoluminescence material layer 30 emits light. Preferably, the excitation light source 40 has a wavelength of 365nm, which enables better energy replenishment of the mechanoluminescence material layer 30. Specifically, the excitation light source 40 may be an LED or a fluorescent lamp, as long as it can emit ultraviolet light in the range of 300nm to 400nm, and is not limited herein.
Specifically, the thickness of the carrier plate 10 is 2mm or less.
In the present embodiment, the thickness of the carrier plate 10 is 2mm or less. It will be appreciated that an excessive thickness of the carrier plate 10 may cause an external force to be hardly transmitted to the force-induced luminescent material layer 30, thereby reducing the sensitivity of the sensor 100; the thickness of the carrier plate 10 is too small to support the layer of mechanoluminescence material 30.
Further, the carrier plate 10 is a resin plate or a metal plate.
In the present embodiment, the carrier plate 10 may be a resin plate, such as a PC or ABS, or the like. Of course, the carrier plate 10 may be a metal plate, such as an iron plate or an aluminum plate. In particular, different bearing plates 10 can be adopted according to the surface properties of the object to be measured, for example, when used for monitoring buildings, metal plates can be adopted; when monitoring a certain part of the instrument, a resin plate can be adopted, so that the monitoring is convenient.
Referring to fig. 1, the sensor 100 further includes a partition plate 50 disposed in the cavity, the partition plate 50 is located on a side of the mechanoluminescence material layer 30 facing away from the carrier plate 10, and divides the cavity into a first chamber 21 and a second chamber 22, and the mechanoluminescence material layer 30 and the excitation light source 40 are disposed in the first chamber 21.
In this embodiment, the partition plate 50 is disposed in the cavity, the partition plate 50 divides the cavity into the first chamber 21 and the second chamber 22, the luminescent material layer 30 and the excitation light source 40 are disposed in the first chamber 21, and the second chamber 22 may be provided with a heat dissipation device, so that the heat generated by the light emitted by the excitation light source 40 may generate heat, and the generated heat may affect the precision component when the surface of the precision component is measured.
Specifically, the wall of the first chamber 21 is a light shielding wall.
In the present embodiment, the cavity wall of the first chamber 21 is an opaque cavity wall in order to reduce the influence of light in the external environment on the sensitivity of the sensor 100. A material which is itself opaque, such as black resin or opaque metal, may be used, and a transparent material may be used, but it is necessary to apply an opaque coating to the surface.
Further, the wall of the second chamber 22 is provided with a heat dissipation hole 23 communicated with the outside.
It can be appreciated that, since the sensor 100 generates a large amount of heat during operation, the operation of the sensor 100 is adversely affected due to the excessively high temperature, so that in order to reduce the temperature in the cavity, the second chamber 22 is provided with heat dissipation holes 23 communicated with the outside, and the heat dissipation holes 23 are uniformly distributed on the outer surface of the second chamber 22, so as to realize the ventilation between the second chamber 22 and the outside.
Referring to fig. 1, the sensor 100 further includes a signal acquisition device 60, where the signal acquisition device 60 is disposed in the first chamber 21 and is configured to acquire the optical signal emitted by the luminescent material layer 30.
In this embodiment, the signal acquisition device 60 is a high-performance silicon photomultiplier, and can acquire and amplify the micro-light signal. The device is composed of an array formed by mutually parallel connection of a plurality of pixels working in a geiger mode, each pixel is formed by connecting an avalanche photodiode and a quenching resistor in series, a PN junction is formed by doping different conductive types in a silicon material, a bias voltage is externally applied to two ends of the PN junction to form a directional electric field, carriers are enabled to move directionally to form current, and photon detection is achieved by detecting current signals.
The photomultiplier adopted in the embodiment has the excellent characteristics of spectral response range from near ultraviolet to near infrared, excellent photon counting capability, single photon level sensitivity, picosecond level quick response capability, excellent time resolution, higher photon detection efficiency and the like, and has the advantages that the solid detector is insensitive to magnetic fields, can resist high-strength mechanical impact and cannot age due to saturation of incident light.
With continued reference to fig. 1, the sensor 100 further includes a signal transmission device 80, where the signal transmission device 80 is disposed in the second chamber 22, and the signal transmission device 80 is electrically connected to the signal acquisition device 60, so as to enable the sensor 100 to perform data communication with an external device.
In this embodiment, the sensor 100 further includes a signal transmission device 80, where the signal transmission device 80 mainly transmits the signal collected by the signal collection device 60 to the cloud server, performs signal conversion and image recovery, and then feeds back the result to the mobile terminal. Specifically, the signal transmission device 80 may be a wi module or a bluetooth module, or may perform wired transmission.
Further, the sensor 100 further includes a controller 70, where the controller 70 is disposed in the second chamber 22 and is electrically connected to the excitation light source 40, the signal acquisition device 60, and the signal transmission device 80, respectively;
in the present embodiment, the controller 70 can control the excitation light source 40 to emit light, can also control the signal acquisition device 60 to acquire a signal, and can control the signal transmission device 80 to perform signal transmission. The controller 70 can be a circuit board and is provided with a microprocessor such as a singlechip and the like, and can control the opening and closing of a circuit. Since the controller 70 generates more heat during operation, the controller 70 is disposed in the second chamber 22 so as not to affect the collection of the signal collection device 60.
It is understood that the controller 70 may also be a PCB board with the signal transmission device 80 integrated, and the PCB board is provided with a microprocessor such as a single chip microcomputer for controlling a circuit, and a WiFi module or a bluetooth module for data transmission.
The invention also proposes a control method of the sensor 100, wherein the sensor 100 comprises:
a carrier plate 10;
the shell 20 is covered on the bearing plate 10, and forms a containing cavity with the bearing plate 10;
the mechanoluminescence material layer 30, the mechanoluminescence material layer 30 is arranged on the surface of the bearing plate 10 facing the cavity;
the excitation light source 40 is arranged in the cavity and is adjacent to the luminescent material layer 30, and the excitation light source 40 is used for exciting the luminescent material layer 30;
the signal acquisition device 60, the signal acquisition device 60 is arranged in the cavity and is used for acquiring the light signal emitted by the luminescent material layer 30;
the signal transmission device 80, the signal transmission device 80 is arranged in the cavity and is electrically connected with the signal acquisition device 60, and is used for enabling the sensor 100 to perform data communication with external equipment;
the controller 70, the controller 70 is disposed in the cavity, and is electrically connected to the excitation light source 40, the signal acquisition device 60, and the signal transmission device 80, respectively.
The control method of the sensor 100 includes the steps of:
step S1, identifying the working state of the signal acquisition device 60 every first preset time interval;
step S2, when the signal acquisition device 60 is identified to not acquire signals, the signal acquisition device 60 is controlled to be turned off, and the excitation light source 40 is controlled to be started so as to charge the force-induced luminescent material layer 30 for a second preset time period;
step S3, when the charging is finished, the signal acquisition device 60 is controlled to be turned on, the excitation light source 40 is controlled to be turned off, and the step S1 is returned to continuously identify the working state of the signal acquisition device 60.
In the present embodiment, during the operation of the sensor 100, the operation state of the signal acquisition device 60 is identified; when it is recognized that the signal acquisition device 60 does not acquire a signal, the signal acquisition device 60 is turned off, the excitation light source 40 is started, and the mechanoluminescence material layer 30 is irradiated for a second preset period of time. Before the excitation light source 40 is activated, the signal acquisition device 60 is turned off so as not to damage the signal acquisition device 60 due to the light signal of the excitation light source 40 being too strong.
After the charging of the luminescent material layer 30 is completed, the excitation light source 40 is controlled to be turned off, and the step S1 is returned, that is, after the charging is completed, the working state of the signal acquisition device 60 is continuously judged, and the above operations are continuously circulated. The light emitted by the excitation light source 40 irradiates the mechanoluminescence material layer 30, so that the fluorescence attenuation and energy supplement of the mechanoluminescence material layer 30 achieve dynamic balance, the energy storage stability of the mechanoluminescence material layer 30 is ensured, the energy storage time of the mechanoluminescence material layer 30 is prolonged, the stability of the sensor 100 is further improved, and the sensor 100 can monitor for a long time.
Specifically, the second preset time period may be 3 minutes, and the signal acquisition device 60 and the excitation light source 40 may alternately operate. For example, the mechanoluminescence material layer 30 may be irradiated with an excitation light source 40 having a certain power every 30 minutes for 3 minutes to dynamically balance the fluorescence attenuation and energy replenishment of the mechanoluminescence material layer 30.
Step S4: after the step of identifying the operation state of the signal acquisition device 60, it further includes:
when it is recognized that the signal acquisition device 60 is performing signal acquisition, the process returns to the step of "recognizing the operation state of the signal acquisition device 60 every interval for a first preset period of time".
It will be appreciated that identifying the operating state of the signal acquisition device 60 may be performed in two ways, one in which the signal acquisition device 60 is not performing signal acquisition and the other in which the signal acquisition device 60 is performing signal acquisition. When it is identified that the signal acquisition device 60 is performing signal acquisition, the process returns to step S1, that is, the working state of the signal acquisition device 60 is continuously identified for a first preset time period at each interval, and the next step is determined to perform step S2 or step S4 according to the identification result, so as to continuously circulate and prolong the energy storage time of the electroluminescent material layer 30, thereby enabling the sensor 100 to perform long-time monitoring.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. A sensor, comprising:
a carrying plate;
the shell is covered on the bearing plate and is enclosed with the bearing plate to form a containing cavity, an outer extension edge is formed at the position, adjacent to the bearing plate, of the shell in a bending mode, and the outer extension edge is abutted with the bearing plate;
the force-induced luminous material layer is arranged on the surface of the bearing plate facing the containing cavity;
the excitation light source is arranged in the cavity and adjacent to the mechanoluminescence material layer, and the excitation light source is used for exciting the mechanoluminescence material layer;
the separation plate is arranged in the containing cavity, is positioned on one side of the forced luminous material layer, which is far away from the bearing plate, and separates the containing cavity into a first cavity and a second cavity, and the forced luminous material layer and the excitation light source are arranged in the first cavity.
2. The sensor of claim 1, wherein the excitation light source is disposed on an inner surface of the sidewall of the housing, and a distance between the excitation light source and the carrier plate is greater than a thickness of the layer of mechanoluminescence material.
3. The sensor of claim 2, wherein a plurality of excitation light sources are provided, and a plurality of the excitation light sources are arranged at intervals along the circumferential direction of the cavity;
and/or the luminous wavelength of the excitation light source is ultraviolet light in the range of 300nm-400 nm.
4. The sensor of claim 1, wherein the carrier plate has a thickness of 2mm or less;
and/or the bearing plate is a resin plate or a metal plate.
5. The sensor of any one of claims 1 to 4, wherein the walls of the first chamber are light-blocking walls.
6. The sensor of any one of claims 1 to 4, further comprising a signal acquisition device disposed within the first chamber for acquiring the optical signal emitted by the layer of mechanoluminescence material.
7. The sensor of claim 6, further comprising a signal transmission device disposed within the second chamber, the signal transmission device being electrically coupled to the signal acquisition device for enabling the sensor to communicate data with an external device.
8. The sensor of claim 7, further comprising a controller disposed in the second chamber and electrically connected to the excitation light source, the signal acquisition device, and the signal transmission device, respectively.
9. A method of controlling a sensor, the sensor comprising:
a carrying plate;
the shell is covered on the bearing plate and is enclosed with the bearing plate to form a containing cavity;
the force-induced luminous material layer is arranged on the surface of the bearing plate facing the containing cavity;
the excitation light source is arranged in the cavity and adjacent to the mechanoluminescence material layer, and the excitation light source is used for exciting the mechanoluminescence material layer;
the signal acquisition device is arranged in the containing cavity and is used for acquiring the light signals emitted by the mechanoluminescence material layer;
the signal transmission device is arranged in the accommodating cavity and is electrically connected with the signal acquisition device, and is used for enabling the sensor to be in data communication with external equipment;
the controller is arranged in the containing cavity and is respectively and electrically connected with the excitation light source, the signal acquisition device and the signal transmission device;
the control method of the sensor comprises the following steps:
identifying the working state of the signal acquisition device every interval for a first preset time length;
when the signal acquisition device is identified to not acquire signals, the signal acquisition device is controlled to be closed, and the excitation light source is controlled to be started so as to charge the forced luminous material layer for a second preset time length;
and when the energy charging is finished, controlling the signal acquisition device to be started, controlling the excitation light source to be closed, and returning to the step of identifying the working state of the signal acquisition device every interval for a first preset duration.
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