CN111579000A - Exhibition site environment monitoring system - Google Patents
Exhibition site environment monitoring system Download PDFInfo
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- CN111579000A CN111579000A CN202010465795.9A CN202010465795A CN111579000A CN 111579000 A CN111579000 A CN 111579000A CN 202010465795 A CN202010465795 A CN 202010465795A CN 111579000 A CN111579000 A CN 111579000A
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- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides an exhibition site environment monitoring system, which utilizes a vibration sensor, a signal processor, an image collector, an image processor, a core processor, an exhibition board position monitor, a memory and a display, wherein the vibration sensor is utilized to obtain vibration signals of an exhibition board and transmit the collected vibration signals to the signal processor, the signal processor carries out signal processing on the received vibration signals to filter out environmental noise signals, the image collector is used for collecting image information of the exhibition board, the image processor carries out image de-noising processing on the received image information, and the exhibition board position monitor is used for carrying out high-precision monitoring on the position of the exhibition board so as to realize effective and comprehensive monitoring on the environment of an exhibition site.
Description
Technical Field
The invention relates to the field of intelligent testing, in particular to an exhibition site environment monitoring system.
Background
Among the prior art, monitor exhibition site environment and adopt infrared equipment, camera equipment etc. to monitor usually, however, misjudge takes place easily for infrared equipment, and the definition of the image that camera equipment gathered is not high, greatly reduced environmental monitoring's precision, and can't acquire the on-the-spot whole environmental parameter of exhibition, for example, the positional information of panel or showcase etc. and then can't carry out effective, comprehensive monitoring to the environment on exhibition site.
Disclosure of Invention
Therefore, in order to overcome the above problems, the present invention provides an exhibition site environment monitoring system, which utilizes a vibration sensor, a signal processor, an image collector, an image processor, a core processor, an exhibition board position monitor, a memory and a display, wherein the vibration sensor is utilized to obtain a vibration signal of an exhibition board and transmit the collected vibration signal to the signal processor, the signal processor performs signal processing on the received vibration signal to filter out an environmental noise signal, the image collector is used to collect image information of the exhibition board, the image processor performs image denoising processing on the received image information, and the exhibition board position monitor is used to perform high-precision monitoring on the position of the exhibition board, so as to realize effective and comprehensive monitoring on the environment of the exhibition site.
The exhibition site environment monitoring system provided by the invention comprises a vibration sensor, a signal processor, an image collector, an image processor, a core processor, an exhibition board position monitor, a memory and a display.
The vibration sensor is arranged on the display board, the vibration sensor is used for monitoring vibration signals of the display board, the output end of the vibration sensor is connected with the input end of the signal processor, the output end of the signal processor is connected with the input end of the core processor, the image collector is used for collecting image information of the display board, the output end of the image collector is connected with the input end of the image processor, the output end of the image processor is connected with the input end of the core processor, the display board position monitor is used for monitoring position information of the display board, the output end of the display board position monitor is connected with the input end of the core processor, and the output end of the core processor is connected with the input end of the memory and the input end of the display.
Specifically, the image transmitted from the image collector to the image processor is defined as a two-dimensional function f (x, y), where x and y are space coordinates, and the image processor performs image noise reduction processing on the received image information, including the following steps:
step 1: acquiring a central pixel point (x, y) of an original image f (x, y) acquired by an image acquisition device;
step 2: extracting pixel points in the neighborhood range of the central pixel point (x, y) of the original image f (x, y), comparing the extracted pixel points with the pixel points in the neighborhood, wherein the compared image is g (x, y) if so,
and 4, transmitting the image h (x, y) to a memory for storage, and transmitting the image h (x, y) to a display for display.
Specifically, the vibration sensor sets up on the panel, the vibration sensor is used for monitoring the vibration signal of panel, the output of vibration sensor is connected with signal processor's input, signal processor's output is connected with core processor's input, the internal vibration threshold value signal that has stored of core processor, if the vibration signal that core processor received exceeds the vibration threshold value signal, then core processor transmits vibration alarm signal to remote monitoring end through external transmission equipment, and core processor transmits received vibration signal to the memory and saves, core processor will received vibration signal transmit to the display and show.
Specifically, panel position monitor is used for monitoring the positional information of panel, and panel position monitor's output is connected with the input of core processor, and panel position monitor transmits the positional information who acquires to core processor, and core processor transmits the positional information who receives to the memory and stores, and core processor transmits the positional information who receives to the display and shows.
Specifically, the board position monitor includes: the diode luminous source is arranged on one side of the display background surface;
the light scattering element is arranged on one side of the display background surface relative to the diode light emitting source and is used for forming a linear light beam on the display background surface;
the position pointing piece is a mirror surface;
the position sensors are arranged at two staggered positions of the display board background, and receiving elements are additionally arranged on the sensing paths so as to sense the relative positions of the position pointing piece in at least two directions; and
and a processing circuit which is connected with the position sensor 5 in a signal manner to calculate the absolute position of the position indicator.
Specifically, the display board position monitor is used for monitoring the position of a display board, and comprises the following specific steps:
step 1: generating a linear light beam using a diode light emitting source and a light diffusing element;
step 2: the linear light beam irradiates in the direction parallel to the background surface of the display board and is reflected by the position pointing piece irradiating on the display board;
and step 3: the position sensor is arranged at two staggered positions of the display board background, and receives reflected light irradiated to the position pointing piece through the receiving element so as to acquire the relative position of the position pointing piece, wherein the principle of the position sensor is that when a light beam is incident into the light receiving part, electric charges proportional to light energy are generated at the incident position of the light, the generated electric charges are converted into light current which passes through a P layer, the P layer is a resistance layer with overall equal resistance value, the light current is divided in inverse proportion to the distance between the electrodes, and the light current is extracted from each electrode; therefore, assuming that the distance between the electrodes is L, the total photocurrent is I, the currents extracted from the electrodes in a divided manner are I1 and I2, and the distance between the center of the position sensor and the light velocity incident position is X, I1= I (L-2X)/2L and I2= I (L +2X)/2L are included, so that I1/I2 = (L-2X)/(L +2X), and the incident position of the light beam can be known only by determining the current ratio extracted from the electrodes;
and 4, step 4: according to the sensing results of the two position sensors to the position pointing piece, the absolute position of the position pointing piece is calculated by the processing circuit according to the geometric principle, and the specific position of the display board is obtained.
Specifically, the signal processor includes a first filter circuit, a second filter circuit and a comparison circuit, the first filter circuit includes a first operational amplifier IC1, a first switch Q10, a second switch Q20 and a third switch Q30, a non-inverting input terminal of the first operational amplifier IC1 receives a reference voltage, an inverting input terminal of the first operational amplifier IC1 receives a noise signal, a signal output by the standard vibration sensor in a non-vibration input in a exhibition hall environment is the noise signal, the first operational amplifier IC1 compares the noise signal with the reference voltage and outputs a comparison result at an output terminal thereof, the first switch Q10 includes a first terminal Q11, a second terminal Q12 and a control terminal Q13, the first terminal Q11 receives the noise signal, the second terminal Q12 outputs the first filter signal, the control terminal Q13 is electrically connected to an output terminal of the first operational amplifier IC1, the comparison signal output by the first operational amplifier IC1 to control whether the first terminal Q11 and the second terminal Q12 of the first switch Q10 are turned on or not, the second switch Q20 includes a first terminal Q21, a second terminal Q22 and a control terminal Q23, the first terminal Q21 is electrically connected to the second terminal Q12 of the first switch Q10, the second terminal Q22 is electrically connected to a reference voltage, the control terminal Q23 is electrically connected to the output terminal of the first operational amplifier IC1, the first terminal Q21 and the second terminal Q22 are controlled to be turned on or off according to a comparison signal output by the first operational amplifier IC1, the third switch Q30 includes a first terminal Q31, a second terminal Q32 and a control terminal Q33, the first terminal Q31 is electrically connected to the second terminal Q12 of the first switch Q10, the second terminal Q32 is electrically connected to the reference voltage, the control terminal Q33 receives a noise signal, and the first terminal Q31 and the second terminal Q32 are controlled to be turned on or off according to the noise signal;
the second filter circuit comprises a second operational amplifier IC2, a fourth switch Q40, a fifth switch Q50 and a sixth switch Q60, the non-inverting input terminal of the second operational amplifier IC2 receives a reference voltage, the inverting input terminal receives a vibration signal collected by the vibration sensor, the second operational amplifier IC2 compares the vibration signal with the reference voltage and outputs the comparison result at the output terminal thereof, the fourth switch Q40 comprises a first terminal Q41, a second terminal Q42 and a control terminal Q43, the first terminal Q41 receives the vibration signal, the second terminal Q42 outputs a second filtered signal, the control terminal Q43 is electrically connected to the output terminal of the second operational amplifier IC2, the first terminal Q9 and the second terminal Q42 of the fourth switch Q40 are controlled to be turned on or not according to the comparison signal output by the second operational amplifier IC2, the fifth switch Q50 comprises a first terminal Q686 51, a second terminal Q52 and a control terminal Q53, the first terminal Q36 51 is electrically connected to the fourth terminal Q42 of the fourth switch Q42, the second terminal Q52 is electrically connected to a reference voltage, the control terminal Q53 is electrically connected to the output terminal of the second operational amplifier IC2, and controls whether the first terminal Q51 and the second terminal Q52 are turned on or off according to the comparison signal output by the second operational amplifier IC2, the sixth switch Q60 includes a first terminal Q61, a second terminal Q62 and a control terminal Q63, the first terminal Q61 is electrically connected to the second terminal Q42 of the fourth switch Q40, the second terminal Q62 is electrically connected to the reference voltage, the control terminal Q63 receives the vibration signal, and controls whether the first terminal Q61 and the second terminal Q62 are turned on or off according to the vibration signal;
the comparison circuit comprises a third operational amplifier IC3, a fourth operational amplifier IC4, a seventh switch Q70, an eighth switch Q80, a ninth switch Q90 and a tenth switch Q100, a non-inverting input terminal of the third operational amplifier IC3 receives the first filtered signal of the first filter circuit, an inverting input terminal thereof receives the second filtered signal of the second filter circuit, the third operational amplifier IC3 compares the first filtered signal with the second filtered signal and outputs a comparison result at an output terminal thereof, an inverting input terminal of the fourth operational amplifier IC4 receives the first filtered signal of the first filter circuit, a non-inverting input terminal thereof receives the second filtered signal of the second filter circuit, a fourth operational amplifier IC4 compares the first filtered signal with the second filtered signal and outputs the comparison result at an output terminal thereof, the seventh switch Q70 comprises a first terminal Q71, a second terminal Q72 and a control terminal Q73, the control terminal Q73 is electrically connected to the output terminal of the fourth operational amplifier IC4, the eighth switch Q80 includes a first terminal Q81, a second terminal Q82 and a control terminal Q83, the first terminal Q81 is electrically connected to the second terminal Q72 of the seventh switch Q70, the second terminal Q82 is electrically connected to the reference voltage, the control terminal Q83 is electrically connected to the output terminal of the third operational amplifier IC3, the first terminal Q91 is electrically connected to a low-level signal, the standard vibration sensor outputs a low-level signal in the non-vibration state, the second terminal Q92 is electrically connected to the first terminal Q92 of the seventh switch Q92, and the control terminal Q92 is electrically connected to the output terminal of the third operational amplifier IC 92, the tenth switch Q10 includes a first terminal Q101, a second terminal Q102 and a control terminal Q103, the first terminal Q101 is electrically connected to the second terminal Q92 of the ninth switch Q90 and is used for outputting the comparison signal, the second terminal Q102 is electrically connected to the reference voltage, the control terminal Q103 is electrically connected to the output terminal of the fourth operational amplifier IC4, and the first terminal Q101 and the second terminal Q102 are controlled to be turned on according to the comparison signal output by the fourth operational amplifier IC4 according to the comparison signal output by the third operational amplifier IC 3.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides an exhibition site environment monitoring system, which utilizes a vibration sensor, a signal processor, an image collector, an image processor, a core processor, an exhibition board position monitor, a memory and a display, wherein the vibration sensor is utilized to obtain vibration signals of an exhibition board and transmit the collected vibration signals to the signal processor, the signal processor carries out signal processing on the received vibration signals to filter out environmental noise signals, the image collector is used for collecting image information of the exhibition board, the image processor carries out image de-noising processing on the received image information, and the exhibition board position monitor is used for carrying out high-precision monitoring on the position of the exhibition board so as to realize effective and comprehensive monitoring on the environment of an exhibition site.
(2) The invention further provides the system for monitoring the exhibition site environment, which is characterized in that the position of the position pointing piece (4) is positioned by adopting the position sensor (5), so that the position information of the exhibition board can be obtained, and on the basis, the accurate positioning of the position of the exhibition board can be realized, thereby realizing the effective arrangement and management of the exhibition venue. Moreover, the display board position monitor utilizes the photoelectric principle to construct the position sensor (5), so that the light beam propagation is more efficient, and meanwhile, the incident position of the light beam is calculated through the photoelectric principle, so that the detection precision is greatly improved.
(3) The invention further provides an exhibition site environment monitoring system, which is characterized in that the first switch Q10, the third switch Q30, the fourth switch Q40, the sixth switch Q60, the seventh switch Q70 and the eighth switch Q80 are all P-type field effect transistors, the second switch Q20, the fifth switch Q50, the ninth switch Q90 and the tenth switch Q100 are all N-type field effect transistors, the reference voltage is defined as a low-order signal, wherein a signal output by the standard vibration sensor in a non-vibration state is a low-order signal, for example, 0V, and a comparison signal output by the comparison circuit is a vibration signal after noise signals are filtered.
Drawings
FIG. 1 is a schematic diagram of an exhibition site environment monitoring system of the present invention;
FIG. 2 is a schematic view of a panel position monitor of the present invention;
FIG. 3 is a schematic view of a position sensor of the present invention;
fig. 4 is a circuit diagram of a signal processor of the present invention.
Description of the drawings:
1-a diode light emitting source; 2-a linear beam; 3-exhibition board background; a 4-position pointing element; 5-a position sensor; 6-a receiving element; 7-a processing circuit; 8-light dispersing element.
Detailed Description
The exhibition site environment monitoring system provided by the invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the system for monitoring the environment of the exhibition site provided by the invention comprises a vibration sensor, a signal processor, an image collector, an image processor, a core processor, a board position monitor, a memory and a display.
The vibration sensor is arranged on the display board, the vibration sensor is used for monitoring vibration signals of the display board, the output end of the vibration sensor is connected with the input end of the signal processor, the output end of the signal processor is connected with the input end of the core processor, the image collector is used for collecting image information of the display board, the output end of the image collector is connected with the input end of the image processor, the output end of the image processor is connected with the input end of the core processor, the display board position monitor is used for monitoring position information of the display board, the output end of the display board position monitor is connected with the input end of the core processor, and the output end of the core processor is connected with the input end of the memory and the input end of the display.
Preferably, the image transmitted from the image collector to the image processor is defined as a two-dimensional function f (x, y), where x and y are space coordinates, and the image processor performs image noise reduction processing on the received image information, including the following steps:
step 1: acquiring a central pixel point (x, y) of an original image f (x, y) acquired by an image acquisition device;
step 2: extracting pixel points in the neighborhood range of the central pixel point (x, y) of the original image f (x, y), comparing the extracted pixel points with the pixel points in the neighborhood, wherein the compared image is g (x, y) if so,
and 4, transmitting the image h (x, y) to a memory for storage, and transmitting the image h (x, y) to a display for display.
Preferably, the vibration sensor is arranged on the display board and used for monitoring vibration signals of the display board, the output end of the vibration sensor is connected with the input end of the signal processor, the output end of the signal processor is connected with the input end of the core processor, vibration threshold signals are stored in the core processor, if the vibration signals received by the core processor exceed the vibration threshold signals, the core processor transmits vibration alarm signals to the remote monitoring end through external transmission equipment, the core processor transmits the received vibration signals to the memory for storage, and the core processor transmits the received vibration signals to the display for display.
Preferably, the display board position monitor is used for monitoring position information of a display board, an output end of the display board position monitor is connected with an input end of the core processor, the display board position monitor transmits the acquired position information to the core processor, the core processor transmits the received position information to the memory for storage, and the core processor transmits the received position information to the display for display.
In the above embodiment, utilize vibration sensor, signal processor, the image collector, image processor, the core processor, panel position monitor, memory and display, wherein, utilize vibration sensor to acquire the vibration signal of panel, and transmit the vibration signal who gathers to signal processor, signal processor carries out signal processing with filtering environmental noise signal to the vibration signal who receives, image collector is used for gathering the image information of panel, image processor carries out image denoising processing to the image information who receives, panel position monitor is used for carrying out high accuracy monitoring to the position of panel, in order to realize carrying out effective, comprehensive monitoring to the environment at exhibition scene.
As shown in fig. 2, the display board position monitor of the present invention is used for monitoring the position of a display board, and comprises the following specific steps:
step 1: generating a linear light beam 2 by using a diode light emitting source 1 and a light scattering element 8;
step 2: the linear light beam 2 irradiates in a direction parallel to the surface of the background 3 of the display board and is reflected by the position pointing element 4 irradiating on the display board;
and step 3: the position sensor 5 is disposed at two staggered positions of the display board background 3, and receives the reflected light irradiated to the position pointing member 4 through the receiving element 6 to obtain the relative position of the position pointing member 4, wherein, as shown in fig. 3, the principle of the position sensor 5 is that when a light beam is incident into the light receiving part, a charge proportional to the light energy is generated at the incident position of the light, the generated charge is converted into a photocurrent which passes through a P layer (the P layer is a resistance layer with a uniform resistance value on the whole), and the photocurrent is divided in inverse proportion to the distance (resistance value) between the electrodes and is extracted from each electrode; therefore, assuming that the distance between the electrodes is L, the total photocurrent is I, the currents extracted from the electrodes in a divided manner are I1 and I2, and the distance between the center of the position sensor 5 and the light velocity incident position is X, I1= I (L-2X)/2L and I2= I (L +2X)/2L are provided, so that I1/I2 = (L-2X)/(L +2X), and the incident position of the light beam can be known (irrespective of the light energy level) by simply determining the current ratio extracted from the electrodes;
and 4, step 4: according to the sensing results of the two position sensors 5 on the position pointing member 4, the processing circuit 7 calculates the absolute position of the position pointing member 4 according to the geometric principle, i.e. the specific position of the display board is known.
The display board position monitor of the invention comprises:
a diode luminous source 1, wherein the diode luminous source 1 is arranged on one side of the surface of the display background 3;
the light scattering element 8 is arranged on one side of the surface of the display background 3 opposite to the diode light emitting source 1 and is used for forming a linear light beam 2 on the surface of the display background 3;
a position pointing member 4 such as a mirror or the like capable of reflecting light;
at least two position sensors 5, the position sensors 5 are arranged at two staggered positions of the display board background 3, and a receiving element 6 is additionally arranged on a sensing path so as to sense the relative positions of the position pointing piece 4 in at least two directions; and
and a processing circuit 7 which is connected with the position sensor 5 in a signal manner to calculate the absolute position of the position indicator 4.
In the above-mentioned embodiment, fix a position through adopting position sensor 5 to the position of position direction piece 4, and then can obtain the positional information of panel, on this basis, can realize the accurate positioning to the panel position to the realization is to the effective arrangement and the management in show venue. Moreover, the display board position monitor utilizes the principle of photocurrent to construct the position sensor 5, so that the light beam propagation is more efficient, and meanwhile, the incident position of the light beam is calculated through the principle of photocurrent, so that the detection precision is greatly improved.
As shown in fig. 4, the signal processor includes a first filter circuit, a second filter circuit and a comparison circuit, the first filter circuit includes a first operational amplifier IC1, a first switch Q10, a second switch Q20 and a third switch Q30, a non-inverting input terminal of the first operational amplifier IC1 receives a reference voltage, an inverting input terminal of the first operational amplifier IC1 receives a noise signal (a signal output by a standard vibration sensor when there is no vibration input in a exhibition hall environment is a noise signal), the first operational amplifier IC1 compares the noise signal with the reference voltage and outputs a comparison result at an output terminal thereof, the first switch Q10 includes a first terminal Q11, a second terminal Q12 and a control terminal Q13, the first terminal Q11 receives the noise signal, the second terminal Q12 outputs a first filter signal, the control terminal Q13 is electrically connected to an output terminal of the first operational amplifier IC1, the comparison signal output by the first operational amplifier IC1 controls whether the first terminal Q11 and the second terminal Q12 of the first switch Q10 are turned on or not, the second switch Q20 includes a first terminal Q21, a second terminal Q22 and a control terminal Q23, the first terminal Q21 is electrically connected to the second terminal Q12 of the first switch Q10, the second terminal Q22 is electrically connected to a reference voltage, the control terminal Q23 is electrically connected to the output terminal of the first operational amplifier IC1, the first terminal Q21 and the second terminal Q22 are controlled to be turned on or off according to a comparison signal output by the first operational amplifier IC1, the third switch Q30 includes a first terminal Q31, a second terminal Q32 and a control terminal Q33, the first terminal Q31 is electrically connected to the second terminal Q12 of the first switch Q10, the second terminal Q32 is electrically connected to the reference voltage, the control terminal Q33 receives a noise signal, and the first terminal Q31 and the second terminal Q32 are controlled to be turned on or off according to the noise signal.
The second filter circuit comprises a second operational amplifier IC2, a fourth switch Q40, a fifth switch Q50 and a sixth switch Q60, the non-inverting input terminal of the second operational amplifier IC2 receives a reference voltage, the inverting input terminal receives a vibration signal collected by the vibration sensor, the second operational amplifier IC2 compares the vibration signal with the reference voltage and outputs the comparison result at the output terminal thereof, the fourth switch Q40 comprises a first terminal Q41, a second terminal Q42 and a control terminal Q43, the first terminal Q41 receives the vibration signal, the second terminal Q42 outputs a second filtered signal, the control terminal Q43 is electrically connected to the output terminal of the second operational amplifier IC2, the first terminal Q9 and the second terminal Q42 of the fourth switch Q40 are controlled to be turned on or not according to the comparison signal output by the second operational amplifier IC2, the fifth switch Q50 comprises a first terminal Q686 51, a second terminal Q52 and a control terminal Q53, the first terminal Q36 51 is electrically connected to the fourth terminal Q42 of the fourth switch Q42, the second terminal Q52 is electrically connected to a reference voltage, the control terminal Q53 is electrically connected to an output terminal of the second operational amplifier IC2, and controls whether the first terminal Q51 and the second terminal Q52 are turned on or off according to a comparison signal output by the second operational amplifier IC2, the sixth switch Q60 includes a first terminal Q61, a second terminal Q62, and a control terminal Q63, the first terminal Q61 is electrically connected to the second terminal Q42 of the fourth switch Q40, the second terminal Q62 is electrically connected to the reference voltage, the control terminal Q63 receives a vibration signal, and controls whether the first terminal Q61 and the second terminal Q62 are turned on or off according to the vibration signal.
The comparison circuit comprises a third operational amplifier IC3, a fourth operational amplifier IC4, a seventh switch Q70, an eighth switch Q80, a ninth switch Q90 and a tenth switch Q100, a non-inverting input terminal of the third operational amplifier IC3 receives the first filtered signal of the first filter circuit, an inverting input terminal thereof receives the second filtered signal of the second filter circuit, the third operational amplifier IC3 compares the first filtered signal with the second filtered signal and outputs a comparison result at an output terminal thereof, an inverting input terminal of the fourth operational amplifier IC4 receives the first filtered signal of the first filter circuit, a non-inverting input terminal thereof receives the second filtered signal of the second filter circuit, a fourth operational amplifier IC4 compares the first filtered signal with the second filtered signal and outputs the comparison result at an output terminal thereof, the seventh switch Q70 comprises a first terminal Q71, a second terminal Q72 and a control terminal Q73, the control terminal Q73 is electrically connected to the output terminal of the fourth operational amplifier IC4, according to the comparison signal outputted from the fourth operational amplifier IC4, to control whether the first terminal Q71 and the second terminal Q72 are conducted, the eighth switch Q80 includes a first terminal Q81, a second terminal Q82 and a control terminal Q83, the first terminal Q81 is electrically connected to the second terminal Q72 of the seventh switch Q70, the second terminal Q82 is electrically connected to the reference voltage, the control terminal Q83 is electrically connected to the output terminal of the third operational amplifier IC3, according to the comparison signal outputted from the third operational amplifier IC3, to control whether the first terminal Q81 and the second terminal Q82 are conducted, the ninth switch Q90 includes a first terminal Q91, a second terminal Q92 and a control terminal Q93, the first terminal Q91 is electrically connected to a low level signal (the signal outputted from the standard vibration sensor in the vibration-free state is a low level signal), the second terminal Q92 is electrically connected to the first terminal Q71 of the seventh switch Q70 and is used to output terminal Q93 and to the third operational amplifier IC3, the tenth switch Q10 includes a first terminal Q101, a second terminal Q102 and a control terminal Q103, the first terminal Q101 is electrically connected to the second terminal Q92 of the ninth switch Q90 and is used for outputting the comparison signal, the second terminal Q102 is electrically connected to the reference voltage, the control terminal Q103 is electrically connected to the output terminal of the fourth operational amplifier IC4, and the first terminal Q101 and the second terminal Q102 are controlled to be turned on according to the comparison signal output by the fourth operational amplifier IC4 according to the comparison signal output by the third operational amplifier IC 3.
In the above embodiments, the first switch Q10, the third switch Q30, the fourth switch Q40, the sixth switch Q60, the seventh switch Q70, and the eighth switch Q80 are all P-type fets, the second switch Q20, the fifth switch Q50, the ninth switch Q90, and the tenth switch Q100 are all N-type fets, and the reference voltage is defined as a low-level signal, where a signal output by the standard vibration sensor in a vibration-free state is a low-level signal, for example, 0V, and a comparison signal output by the comparison circuit is a vibration signal with a noise signal filtered.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The exhibition site environment monitoring system is characterized by comprising a vibration sensor, a signal processor, an image collector, an image processor, a core processor, an exhibition board position monitor, a memory and a display;
wherein, vibration sensor sets up on the panel, vibration sensor is used for monitoring the vibration signal of panel, vibration sensor's output with signal processor's input is connected, signal processor's output with core processor's input is connected, image collector is used for gathering the image information of panel, image collector's output with image processor's input is connected, image processor's output with core processor's input is connected, panel position monitor is used for monitoring the positional information of panel, panel position monitor's output with core processor's input is connected, core processor's output with the input of memory with the input of display is connected.
2. The system for monitoring the environment at the exhibition site according to claim 1, wherein the image transmitted from the image collector to the image processor is defined as a two-dimensional function f (x, y), wherein x and y are spatial coordinates, and the image processor performs image noise reduction processing on the received image information, comprising the steps of:
step 1: acquiring a central pixel point (x, y) of an original image f (x, y) acquired by an image acquisition device;
step 2: extracting pixel points in the neighborhood range of the central pixel point (x, y) of the original image f (x, y), comparing the extracted pixel points with the pixel points in the neighborhood, wherein the compared image is g (x, y) if so,
step 3, taking the image g (x, y) as a background signal, removing the background signal from the original image f (x, y) to obtain an image h (x, y) if the image h (x, y) exists,
and 4, transmitting the image h (x, y) to the memory for storage, and transmitting the image h (x, y) to the display for display.
3. The exhibition site environment monitoring system of claim 1, wherein the vibration sensor is disposed on the exhibition board, the vibration sensor is used for monitoring the vibration signal of the exhibition board, the output end of the vibration sensor is connected with the input end of the signal processor, the output end of the signal processor is connected with the input end of the core processor, a vibration threshold signal is stored in the core processor, if the vibration signal received by the core processor exceeds the vibration threshold signal, the core processor transmits a vibration alarm signal to the remote monitoring end through an external transmission device, and transmits the received vibration signal to the memory for storage, and the core processor transmits the received vibration signal to the display for display.
4. The system for monitoring the environment at the exhibition site according to claim 1, wherein the exhibition board position monitor is used for monitoring the position information of the exhibition board, the output end of the exhibition board position monitor is connected with the input end of the core processor, the exhibition board position monitor transmits the acquired position information to the core processor, the core processor transmits the received position information to the memory for storage, and the core processor transmits the received position information to the display for display.
5. The system of claim 1, wherein the board position monitor comprises: the LED light source (1), the LED light source (1) is arranged on one side of the surface of the display background (3);
the light scattering element (8) is arranged on one side of the surface of the display background (3) relative to the diode light emitting source (1) and is used for forming a linear light beam (2) on the surface of the display background (3);
a position pointing member (4), the position pointing member (4) being a mirror surface;
the position sensors (5) are arranged at two staggered positions of the display board background (3), and receiving elements (6) are additionally arranged on a sensing path so as to sense the relative positions of the position pointing piece (4) in at least two directions; and
and a processing circuit (7) which is in signal connection with the position sensor (5) and calculates the absolute position of the position pointing member (4).
6. The system for monitoring the environment at the exhibition site according to claim 5, wherein the monitor for the exhibition board position is used for monitoring the exhibition board position, and comprises the following steps:
step 1: generating a linear light beam (2) by using a diode light emitting source (1) and a light scattering element (8);
step 2: the linear light beam (2) irradiates in a direction parallel to the surface of the display board background (3), and is reflected by the position pointing piece (4) irradiating on the display board;
and step 3: the position sensor (5) is arranged at two staggered positions of the display board background (3), and receives reflected light irradiated to the position pointing piece (4) through the receiving element (6) so as to acquire the relative position of the position pointing piece (4), wherein the principle of the position sensor (5) is that when a light beam enters a light receiving part, electric charges proportional to light energy are generated at the incident position of the light, the generated electric charges are converted into light current which passes through a P layer, the P layer is a resistance layer with overall equal resistance value, and the light current is divided in inverse proportion to the distance between electrodes and is respectively extracted from each electrode; therefore, assuming that the distance between the electrodes is L, the total photocurrent is I, the currents extracted from the electrodes in a divided manner are I1 and I2, and the distance between the center of the position sensor (5) and the light velocity incident position is X, I1= I (L-2X)/2L and I2= I (L +2X)/2L are provided, so that I1/I2 = (L-2X)/(L +2X), and the incident position of the light beam can be known by simply obtaining the ratio of the currents extracted from the electrodes;
and 4, step 4: according to the sensing results of the two position sensors (5) to the position pointing piece (4), the absolute position of the position pointing piece (4) is calculated by the processing circuit (7) according to the geometric principle, namely the specific position of the display board is known.
7. The system of claim 1, wherein the signal processor comprises a first filter circuit, a second filter circuit and a comparator circuit, the first filter circuit comprises a first operational amplifier IC1, a first switch Q10, a second switch Q20 and a third switch Q30, a non-inverting input of the first operational amplifier IC1 receives a reference voltage, an inverting input of the first operational amplifier IC1 receives a noise signal, a signal output by the standard vibration sensor when there is no vibration input in the exhibition hall environment is a noise signal, the first operational amplifier IC1 compares the noise signal with the reference voltage and outputs a comparison result at an output thereof, the first switch Q10 comprises a first terminal Q11, a second terminal Q12 and a control terminal Q13, the first terminal Q11 receives the noise signal, the second terminal Q12 outputs a first filter signal, the control terminal Q13 is electrically connected to an output of the first operational amplifier IC1, the comparison signal output by the first operational amplifier IC1 is used for controlling whether the first terminal Q11 and the second terminal Q12 of the first switch Q10 are conducted or not, the second switch Q20 comprises a first terminal Q21, a second terminal Q22 and a control terminal Q23, the first terminal Q21 is electrically connected to the second terminal Q12 of the first switch Q10, the second terminal Q22 is electrically connected to the reference voltage, the control terminal Q23 is electrically connected to the output terminal of the first operational amplifier IC1, the first terminal Q21 and the second terminal Q22 are controlled to be conducted or not according to the comparison signal output by the first operational amplifier IC1, the third switch Q30 comprises a first terminal Q31, a second terminal Q32 and a control terminal Q33, the first terminal Q31 is electrically connected to the second terminal Q12 of the first switch Q10, the second terminal Q32 is electrically connected to the reference voltage, the control terminal Q33 receives the noise signal, and the first terminal Q31 and the second terminal Q32 are controlled to be conducted or not according;
the second filter circuit comprises a second operational amplifier IC2, a fourth switch Q40, a fifth switch Q50 and a sixth switch Q60, the non-inverting input terminal of the second operational amplifier IC2 receives a reference voltage, the inverting input terminal receives a vibration signal collected by the vibration sensor, the second operational amplifier IC2 compares the vibration signal with the reference voltage and outputs the comparison result at the output terminal thereof, the fourth switch Q40 comprises a first terminal Q41, a second terminal Q42 and a control terminal Q43, the first terminal Q41 receives the vibration signal, the second terminal Q42 outputs a second filtered signal, the control terminal Q43 is electrically connected to the output terminal of the second operational amplifier IC2, the first terminal Q9 and the second terminal Q42 of the fourth switch Q40 are controlled to be turned on or not according to the comparison signal output by the second operational amplifier IC2, the fifth switch Q50 comprises a first terminal Q686 51, a second terminal Q52 and a control terminal Q53, the first terminal Q36 51 is electrically connected to the fourth terminal Q42 of the fourth switch Q42, the second terminal Q52 is electrically connected to a reference voltage, the control terminal Q53 is electrically connected to the output terminal of the second operational amplifier IC2, and controls whether the first terminal Q51 and the second terminal Q52 are turned on or off according to the comparison signal output by the second operational amplifier IC2, the sixth switch Q60 includes a first terminal Q61, a second terminal Q62 and a control terminal Q63, the first terminal Q61 is electrically connected to the second terminal Q42 of the fourth switch Q40, the second terminal Q62 is electrically connected to the reference voltage, the control terminal Q63 receives the vibration signal, and controls whether the first terminal Q61 and the second terminal Q62 are turned on or off according to the vibration signal;
the comparison circuit comprises a third operational amplifier IC3, a fourth operational amplifier IC4, a seventh switch Q70, an eighth switch Q80, a ninth switch Q90 and a tenth switch Q100, a non-inverting input terminal of the third operational amplifier IC3 receives the first filtered signal of the first filter circuit, an inverting input terminal thereof receives the second filtered signal of the second filter circuit, the third operational amplifier IC3 compares the first filtered signal with the second filtered signal and outputs a comparison result at an output terminal thereof, an inverting input terminal of the fourth operational amplifier IC4 receives the first filtered signal of the first filter circuit, a non-inverting input terminal thereof receives the second filtered signal of the second filter circuit, a fourth operational amplifier IC4 compares the first filtered signal with the second filtered signal and outputs the comparison result at an output terminal thereof, the seventh switch Q70 comprises a first terminal Q71, a second terminal Q72 and a control terminal Q73, the control terminal Q73 is electrically connected to the output terminal of the fourth operational amplifier IC4, the eighth switch Q80 includes a first terminal Q81, a second terminal Q82 and a control terminal Q83, the first terminal Q81 is electrically connected to the second terminal Q72 of the seventh switch Q70, the second terminal Q82 is electrically connected to the reference voltage, the control terminal Q83 is electrically connected to the output terminal of the third operational amplifier IC3, the first terminal Q91 is electrically connected to a low-level signal, the standard vibration sensor outputs a low-level signal in the non-vibration state, the second terminal Q92 is electrically connected to the first terminal Q92 of the seventh switch Q92, and the control terminal Q92 is electrically connected to the output terminal of the third operational amplifier IC 92, the tenth switch Q10 includes a first terminal Q101, a second terminal Q102 and a control terminal Q103, the first terminal Q101 is electrically connected to the second terminal Q92 of the ninth switch Q90 and is used for outputting the comparison signal, the second terminal Q102 is electrically connected to the reference voltage, the control terminal Q103 is electrically connected to the output terminal of the fourth operational amplifier IC4, and the first terminal Q101 and the second terminal Q102 are controlled to be turned on according to the comparison signal output by the fourth operational amplifier IC4 according to the comparison signal output by the third operational amplifier IC 3.
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| CN202010465795.9A CN111579000A (en) | 2020-05-28 | 2020-05-28 | Exhibition site environment monitoring system |
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Application publication date: 20200825 |