CN109085413A - A kind of non-contact type high voltage switchgear safety detecting system and its control method - Google Patents
A kind of non-contact type high voltage switchgear safety detecting system and its control method Download PDFInfo
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- CN109085413A CN109085413A CN201810822832.XA CN201810822832A CN109085413A CN 109085413 A CN109085413 A CN 109085413A CN 201810822832 A CN201810822832 A CN 201810822832A CN 109085413 A CN109085413 A CN 109085413A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 44
- 238000001514 detection method Methods 0.000 claims description 27
- 229910052697 platinum Inorganic materials 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 10
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- 230000032683 aging Effects 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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Abstract
The invention discloses a kind of temperature of high-tension switch cabinet monitoring system and its control methods, the monitoring system includes the display for being set to high-tension switch cabinet surface, and for scanning the two dimensional code/one-dimension code image Handheld intelligent equipment, the Handheld intelligent equipment includes shell, is set to the intracorporal controller of the shell, is embedded in the positive display screen of shell and is set to the camera of shell reverse side；The image signal output end of camera is connected with the picture signal input terminal of controller, and the display output end of controller is connected with the display input terminal of display screen；It further include the framing emitter for being set to camera on one side and luminous ray capable of being issued.When the present invention can prevent high-tension switch cabinet dangerous, operator scans the two-dimensional code/one-dimension code close to high-tension switch cabinet, by station at a distance, determines whether high-tension switch cabinet is safe, promotes the safety coefficient of operator itself.
Description
Technical Field
The invention relates to the technical field of high-voltage switch cabinet safety, in particular to a non-contact high-voltage switch cabinet safety detection system and a control method thereof.
Background
At present, most high-voltage switch equipment adopts a closed structure, the heat dissipation condition is poor, in the long-term operation process, the contact or the joint part in the switch cabinet generates heat due to aging or overlarge contact resistance, and the high-voltage switch equipment operates under the conditions of high voltage, large current and full load for a long time. Its result can make the difficult outwards giving off of cabinet body inside heat, and inside contact high temperature influences the life of equipment, can cause conflagration and large tracts of land to have a power failure even when serious, and the serious influence of reliability of cubical switchboard is to the electric energy quality. According to incomplete statistics, a plurality of high-voltage switch cabinet accidents with different degrees occur in domestic power plants and power supply companies, and certain economic loss is caused. If the electrified condition appears in the high tension switchgear, operating personnel directly operates the high tension switchgear, will bring danger to operating personnel's personal safety by force, this is the present problem that awaits the solution urgently.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and particularly innovatively provides a non-contact high-voltage switch cabinet safety detection system and a control method thereof.
In order to achieve the purpose, the invention discloses a non-contact type high-voltage switch cabinet safety detection system which comprises a display arranged on the surface of a high-voltage switch cabinet, wherein a two-dimensional code/one-dimensional code image is displayed on the display, and the two-dimensional code/one-dimensional code image contains safety information of the high-voltage switch cabinet; the handheld intelligent equipment comprises a shell, a controller arranged in the shell, a display screen embedded in the front of the shell and a camera arranged on the back of the shell; the image signal output end of the camera is connected with the image signal input end of the controller, and the display output end of the controller is connected with the display input end of the display screen; the device comprises a camera, a controller and a display screen, and is characterized by further comprising an image positioning and transmitting device which is arranged beside the camera and can emit visible light, wherein the working signal output end of the controller is connected with the working signal input end of the image positioning and transmitting device, when the camera scans the two-dimensional code/one-dimensional code image, the visible light emitted by the image positioning and transmitting device is emitted to the two-dimensional code/one-dimensional code image, and the scanned two-dimensional code/one-dimensional code image information is displayed on the display screen. When preventing that high tension switchgear is unsafe, operating personnel is close to high tension switchgear, scans two-dimensional code/one-dimensional code through standing in the distance, confirms whether safe at high tension switchgear, promotes operating personnel's self factor of safety.
In a preferred embodiment of the present invention, the remote control system further comprises a wireless connection module, the wireless connection end of the wireless connection module is connected to the wireless connection end of the controller, and the remote control center is connected to the controller through the network connection module. The equipment exchanges data with a remote control center.
In a preferred embodiment of the present invention, a live detection device for detecting whether the high voltage switch cabinet is live is disposed in the high voltage switch cabinet, and a detection signal output end of the live detection device is connected to a detection signal input end of the high voltage switch cabinet controller. Whether monitoring high tension switchgear is electrified reduces the safety risk before operating personnel operates.
In a preferred embodiment of the present invention, a temperature sensor for monitoring an internal temperature of the high voltage switch cabinet is disposed in the high voltage switch cabinet, a temperature signal output end of the temperature sensor is connected to a temperature signal input end of a controller of the high voltage switch cabinet, and the present invention further includes a lifting mechanism for lifting a height of the temperature sensor, the lifting mechanism includes a fixed pulley and a stepping motor respectively disposed on an inner top surface of the high voltage switch cabinet through a first bracket and a second bracket, a first end of the load line is fixed to the temperature sensor, and a second end of the load line passes through the fixed pulley and then is fixed to a rotation end of the stepping motor. Clockwise and anticlockwise rotation through step motor drives the load line winding on the rotation axis for the load line is put long and is received short, can monitor the temperature of different high pre-monitoring points in the high tension switchgear.
Or/and be provided with the buckle that is used for fixed thermometer on the high tension switchgear door inner face that opens and shuts and be provided with transparent observation window on opening and shutting, the thermometer is fixed on the buckle, and the thermometer scale is observed through the transparent observation window that sets up on opening and shutting, still includes to be provided with the warning layer on transparent observation window. Set up the temperature value in the cubical switchboard that the thermometer is more audio-visual looks over the cubical switchboard to it is more striking to set up the warning layer, and when the temperature of thermometer rose to the warning layer and above, arouse operating personnel's attention more easily.
In a preferred embodiment of the present invention, the controller further includes an a/D conversion module, the temperature signal output end of the temperature sensor is connected to the analog signal input end of the a/D conversion module, and the digital signal output end of the a/D conversion module is connected to the digital signal input end of the controller, so as to convert the analog signal output by the temperature sensor into a digital signal and input the digital signal to the controller. The conversion into digital signals is convenient for the controller to recognize.
The invention also discloses a control method of the non-contact high-voltage switch cabinet safety detection system, which presets a unique authentication account and an authentication password corresponding to the authentication account on a remote control center and comprises the following steps:
s1, initializing the system, and inputting the number M of authentication account numbersiNumber of authentication password inputs N equal to 0iI is the device ID number 0;
s2, judging whether the input authentication account and the authentication password are the same as the authentication account and the authentication password stored by the remote control center:
if the input authentication account and the authentication password are the same as the authentication account and the authentication password stored in the remote control center, executing step S4;
if the input authentication account number is different from all the authentication account numbers stored in the remote control center, prompting that the authentication account number does not exist, and recording the time as tMRecording the ID number of the equipment for sending the authentication account number as j, Mj＝Mj+1, go to step S3;
if the input authentication password is different from the authentication password corresponding to the authentication account number stored in the remote control center; prompting the wrong input of the authentication password and recording the time as tNRecording the ID number of the equipment for sending the authentication password as j, Nj＝Nj+1, go to step S3;
s3, determining tMOr tNWhether less than or equal to a preset threshold time:
if tMOr tNIf the time is less than or equal to the preset threshold time, and the total number of times of the authentication account number input by the same ID device is greater than or equal to the preset number of times of the authentication account number, or the total number of times of the authentication password input by the same ID device is greater than or equal to the preset number of times of the authentication password, the remote control center does not verify the authentication account number of the ID device, and prompts that the number of times of the authentication account number or the authentication password input by the ID device exceeds the limit, and step S3 is executed;
if tMOr tNThe time is less than or equal to the preset threshold value, and the total times of the authentication accounts input by all the equipment are more than or equal to the preset timeIf the total number of times of the authentication account or the total number of times of the authentication password input by all the devices is greater than or equal to the total number of times of the preset authentication password, the remote control center does not verify the authentication account of any device and prompts that the input number of times of the authentication account or the authentication password of the device exceeds the limit, and the step S3 is executed;
if tMOr tNIf the time is longer than the preset threshold value, returning to the step S1;
s4, when information in the one-dimensional code/two-dimensional code is acquired, the information in the one-dimensional code/two-dimensional code comprises safety information of a high-voltage switch cabinet, visible light emitted by an image positioning and emitting device is aligned to the pre-scanned two-dimensional code, and if the two-dimensional code cannot be identified, the two-dimensional code cannot be identified; after the two-dimension code information is successfully acquired, if the high-voltage switch cabinet is electrified, the high-voltage switch cabinet is unsafe, and the high-voltage switch cabinet should be far away from the high-voltage switch cabinet and the input power supply of the high-voltage switch cabinet is turned off; if the high-voltage switch cabinet is safe, the high-voltage switch cabinet can be operated close to the high-voltage switch cabinet. After the operator successfully logs in, whether the safety information of the high-voltage switch cabinet exists or not can be known by utilizing the information of the scanned one-dimensional code/two-dimensional code, and danger is prevented all the time.
In a preferred embodiment of the present invention, the method further comprises the following steps:
s71, initializing the system, and making the judgment times M equal to 0, wherein M is a positive integer;
s72, the controller collects the voltage value of the ith platinum thermal resistor Rt at the moment tCalculating the resistance of the platinum thermal resistor Rt at the momentIs calculated by the formulaWherein,collecting the voltage value of the ith pre-monitoring point for the controller at the time t,the resistance value of the ith platinum thermal resistor Rt at the moment t, R5, R5, R4, I and the temperature value corresponding to the platinum thermal resistor are obtained by looking up a table, wherein the resistance value of the ith platinum thermal resistor Rt is the resistance value of the resistor R5, the resistance value of the resistor R4 is the resistance value of the resistor I, and the current value output by the constant current source is the value of the;
s73, judging whether the temperature value obtained in the step S72 is larger than or equal to a preset temperature threshold value or not, if so, recording the time as t1 by a timer; if the obtained temperature is continuously greater than or equal to a preset temperature threshold value and the duration is t2, judging whether the duration t2 is greater than or equal to a preset duration threshold value, if the duration t2 is greater than or equal to the preset duration threshold value, controlling the alarm device to give an alarm and setting M to be M +1, and if the duration t2 is less than the preset duration threshold value, not giving the alarm and setting M to be M + 0;
and S74, judging the magnitude of the M value and the preset threshold value in the step S73, if the M value is larger than or equal to the preset threshold value, the alarm device gives an alarm, and if the M value is smaller than the preset threshold value, the alarm device does not give an alarm, and the step S72 is returned. And monitoring whether the temperature in the high-voltage switch cabinet is too high or not, and timely alarming.
In a preferred embodiment of the present invention, the method further comprises a step of calculating the height of the temperature sensor, wherein the method comprises the following steps: ht＝Ht-1+ 2X π X R × n, wherein HtIs the height of the position where the temperature sensor is located at time t, Ht-1And the height of the position where the temperature sensor is located at the moment t-1, R is the radius of a rotating shaft of the stepping motor, n is the number of rotating circles, and the clockwise rotation is specified to be positive, and the anticlockwise rotation is specified to be negative.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the invention can upload the collected temperature to the remote controller center, is convenient for the manager to check the temperature information, does not need to watch on the spot, reduces the cost and can monitor the temperature of the pre-monitoring points with different heights.
Drawings
FIG. 1 is a schematic block diagram of the system of the present invention.
Fig. 2 is a schematic diagram of a front structure of a handheld smart device housing according to the present invention.
Fig. 3 is a schematic diagram of a reverse structure of the housing of the handheld smart device according to the present invention.
FIG. 4 is a schematic view of the installation structure of the high voltage switch cabinet and the thermometer of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The invention discloses a temperature monitoring system of a high-voltage switch cabinet, and as shown in figures 1-3, the invention discloses a non-contact safety detection system of the high-voltage switch cabinet, which comprises a display arranged on the surface of the high-voltage switch cabinet, wherein a two-dimensional code/one-dimensional code image is displayed on the display, and the two-dimensional code/one-dimensional code image contains safety information of the high-voltage switch cabinet; the handheld intelligent equipment comprises a shell 1, a controller arranged in the shell 1, a display screen 2 embedded in the front of the shell and a camera 4 arranged on the back of the shell; the image signal output end of the camera is connected with the image signal input end of the controller, and the display output end of the controller is connected with the display input end of the display screen; the device is characterized by further comprising an image positioning and transmitting device 5 which is arranged beside the camera and can emit visible light 6, wherein the working signal output end of the controller is connected with the working signal input end of the image positioning and transmitting device, and when the camera scans the two-dimensional code/one-dimensional code image, the visible light emitted by the image positioning and transmitting device is emitted on the two-dimensional code/one-dimensional code image to display the scanned two-dimensional code/one-dimensional code image information on the display screen. In the embodiment, the image positioning and emitting device is a visible light semiconductor laser, and has strong linearity and is not easy to deflect; the visible light emitted by the image positioning and emitting device has a wavelength range of 400-760 nm, and preferably, the visible light is purple visible light with a wavelength not limited to 555nm, and can also be visible light of other colors, such as yellow light or red light.
In this embodiment, the button switch 3 may be disposed on the front surface of the housing, the button switch 3 is connected in series to a power supply circuit of the image positioning and transmitting device, when the button switch is turned off, the power supply circuit is turned on, the visible light emitted by the image positioning and transmitting device is emitted onto the two-dimensional code or the one-dimensional code image, and the two-dimensional code/the one-dimensional code may be aligned in advance, which saves time.
In a preferred embodiment of the present invention, the remote control system further comprises a wireless connection module, the wireless connection end of the wireless connection module is connected to the wireless connection end of the controller, and the remote control center is connected to the controller through the network connection module. In this embodiment, the wireless connection module is one or any combination of Bluetooth, GPRS, and 4G. GPRS is preferably adopted, and the price cost is low when wireless transmission is carried out.
In a preferred embodiment of the present invention, a live detection device for detecting whether the high voltage switch cabinet is live is disposed in the high voltage switch cabinet, and a detection signal output end of the live detection device is connected to a detection signal input end of the high voltage switch cabinet controller.
In a preferred embodiment of the present invention, a temperature sensor for monitoring an internal temperature of the high voltage switch cabinet is disposed in the high voltage switch cabinet, a temperature signal output end of the temperature sensor is connected to a temperature signal input end of a controller of the high voltage switch cabinet, and the present invention further includes a lifting mechanism for lifting a height of the temperature sensor, the lifting mechanism includes a fixed pulley and a stepping motor respectively disposed on an inner top surface of the high voltage switch cabinet through a first bracket and a second bracket, a first end of the load line is fixed to the temperature sensor, and a second end of the load line passes through the fixed pulley and then is fixed to a rotation end of the stepping motor. In this embodiment, the temperature sensor includes a platinum thermal resistor Rt, a resistor R1, a resistor R2, a resistor R3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a constant current source and an amplifier U1, wherein the constant current source is D4H2, outputs a current of 1 to 15mA, the amplifier is an OP amplifier, a first end of the platinum thermal resistor Rt is connected to a first end of the resistor R1, a second end of the resistor R1 is connected to a first end of the resistor R1 and an output end of the constant current source, a second end of the resistor R1 is connected to a first end of the resistor R2, a second end of the resistor R2 is connected to a first end of the resistor R3 and a non-inverting input end of the amplifier U1, a second end of the resistor R3 is connected to a power ground and a first end of the resistor R2, a second end of the resistor R2 is connected to a second end of the platinum thermal resistor Rt 3 and a second end of the resistor R8653, a second terminal of the resistor R4 is connected to the inverting input terminal of the amplifier U1 and the first terminal of the resistor R5, respectively, and a second terminal of the resistor R5 is connected to the output terminal of the amplifier U1. In the present embodiment, the resistor r1, the resistor r2, and the resistor r3 are three similar leads connected to three ends of the platinum thermistor Rt, and it is generally considered that r1 ═ r2 ═ r 3. a. b and c are three connecting terminals connected with the lead, the voltage Vac between a and c is equal to the voltage VRt on the platinum thermal resistor Rt and the voltage 2 multiplied by Vr (namely Vr1+ Vr2) on two lead resistors, the voltage Vbc between b and c is the voltage Vr (namely Vr2) on one lead resistor, the voltages are respectively added to the positive and negative input ends of the operational amplifier through a resistor network, and the voltage output which is only proportional to the voltage VRt on the platinum thermal resistor and is irrelevant to the voltage Vr on the lead resistor is obtained at the output end of the operational amplifier by the characteristics of the operational amplifier; the influence of the wire resistance on the temperature measurement value is eliminated. The specific calculation process is as follows:
voltage Va is a voltage at a, voltage Vb is a voltage at b, current I is an output current of the constant current source, and resistor R1, resistor R2, resistor R3, resistor R4 and resistor R5 are precision resistors, so that resistor R1, resistor R2, resistor R3, resistor R4 and resistor R5 satisfy: r1 ═ R3, R4 ═ n × R2, R5 ═ 2 × n × R1; wherein n is a positive number. V + is the voltage at the positive input terminal, V-is the voltage at the negative input terminal, and Vo is the voltage at the output terminal. In the circuit, R1 is selected to be more than or equal to 20k omega, so that the resistance value of R1+ Rt + R2 is far smaller than that of R1+ R3+ R5, the current flowing through the resistor R1, the resistor Rt and the resistor R2 is approximately considered to be I, and Vb is also considered to be Vr. The specific calculation process is as follows:
Va＝I×(r1+Rt+r2)＝I×(2×r1+Rt)…………………………………………(1)
Vb＝I×r2＝I×r…………………………………………………………………(2)
the current through resistor R4 and resistor R5 is approximately equal:
namely, it is
From the characteristics V + V-and the simultaneous components (1) to (4) of the operational amplifier, the following are solved:
in the circuit, R1, R2 and I are all constant values, so the output voltage Vo is only related to the resistance value of the platinum thermal resistor Rt and is not related to the resistance values R1, R2 and R3 of the lead, and the aim of accurately compensating is fulfilled. The circuit has the advantages of few circuit components, simple structure and low power consumption.
As shown in fig. 4, or/and a buckle for fixing the thermometer 43 is arranged on the inner surface of the opening and closing door 44 of the high-voltage switch cabinet, and a transparent observation window 42 is arranged on the opening and closing door, the thermometer 43 is fixed on the buckle, the thermometer scale is observed through the transparent observation window arranged on the opening and closing door, and the warning layer 41 is arranged on the transparent observation window.
In a preferred embodiment of the present invention, the controller further includes an a/D conversion module, the temperature signal output end of the temperature sensor is connected to the analog signal input end of the a/D conversion module, and the digital signal output end of the a/D conversion module is connected to the digital signal input end of the controller, so as to convert the analog signal output by the temperature sensor into a digital signal and input the digital signal to the controller.
The invention also discloses a control method of the non-contact high-voltage switch cabinet safety detection system, which presets a unique authentication account and an authentication password corresponding to the authentication account on a remote control center and comprises the following steps:
s1, initializing the system, and inputting the number M of authentication account numbersiNumber of authentication password inputs N equal to 0iI is the device ID number 0;
s2, judging whether the input authentication account and the authentication password are the same as the authentication account and the authentication password stored by the remote control center:
if the input authentication account and the authentication password are the same as the authentication account and the authentication password stored in the remote control center, executing step S4;
if the input authentication account number is different from all the authentication account numbers stored in the remote control center, prompting that the authentication account number does not exist, and recording the time as tMRecording the ID number of the equipment for sending the authentication account number as j, Mj＝Mj+1, go to step S3;
if the input authentication password is different from the authentication password corresponding to the authentication account number stored in the remote control center; prompting the wrong input of the authentication password and recording the time as tNRecording the ID number of the equipment for sending the authentication password as j, Nj＝Nj+1, go to step S3;
s3, determining tMOr tNWhether less than or equal to a preset threshold time:
if tMOr tNIf the time is less than or equal to the preset threshold time, and the total number of times of the authentication account number input by the same ID device is greater than or equal to the preset number of times of the authentication account number, or the total number of times of the authentication password input by the same ID device is greater than or equal to the preset number of times of the authentication password, the remote control center does not verify the authentication account number of the ID device, and prompts that the number of times of the authentication account number or the authentication password input by the ID device exceeds the limit, and step S3 is executed;
if tMOr tNIf the time is less than or equal to the preset threshold time, and the total number of times of the authentication account numbers input by all the devices is greater than or equal to the total number of times of the preset authentication account numbers, or the total number of times of the authentication passwords input by all the devices is greater than or equal to the total number of times of the preset authentication passwords, the remote control center does not verify the authentication account numbers of any device, and prompts that the input times of the authentication account numbers or the authentication passwords of the devices exceed the limit, and the step S3 is executed;
if tMOr tNIf the time is longer than the preset threshold value, returning to the step S1;
s4, when information in the one-dimensional code/two-dimensional code is acquired, the information in the one-dimensional code/two-dimensional code comprises safety information of a high-voltage switch cabinet, visible light emitted by an image positioning and emitting device is aligned to the pre-scanned two-dimensional code, and if the two-dimensional code cannot be identified, the two-dimensional code cannot be identified; after the two-dimension code information is successfully acquired, if the high-voltage switch cabinet is electrified, the high-voltage switch cabinet is unsafe, and the high-voltage switch cabinet should be far away from the high-voltage switch cabinet and the input power supply of the high-voltage switch cabinet is turned off; if the high-voltage switch cabinet is safe, the high-voltage switch cabinet can be operated close to the high-voltage switch cabinet.
In a preferred embodiment of the present invention, the method further comprises the following steps:
s71, initializing the system, and making the judgment times M equal to 0, wherein M is a positive integer;
s72, the controller collects the voltage value of the ith platinum thermal resistor Rt at the moment tCalculating the resistance of the platinum thermal resistor Rt at the momentIs calculated by the formulaWherein,collecting the voltage value of the ith pre-monitoring point for the controller at the time t,the resistance value of the ith platinum thermal resistor Rt at the moment t, R5, R5, R4, I and the temperature value corresponding to the platinum thermal resistor are obtained by looking up a table, wherein the resistance value of the ith platinum thermal resistor Rt is the resistance value of the resistor R5, the resistance value of the resistor R4 is the resistance value of the resistor I, and the current value output by the constant current source is the value of the;
s73, judging whether the temperature value obtained in the step S72 is larger than or equal to a preset temperature threshold value or not, if so, recording the time as t1 by a timer; if the obtained temperature is continuously greater than or equal to a preset temperature threshold value and the duration is t2, judging whether the duration t2 is greater than or equal to a preset duration threshold value, if the duration t2 is greater than or equal to the preset duration threshold value, controlling the alarm device to give an alarm and setting M to be M +1, and if the duration t2 is less than the preset duration threshold value, not giving the alarm and setting M to be M + 0;
and S74, judging the magnitude of the M value and the preset threshold value in the step S73, if the M value is larger than or equal to the preset threshold value, the alarm device gives an alarm, and if the M value is smaller than the preset threshold value, the alarm device does not give an alarm, and the step S72 is returned.
In a preferred embodiment of the present invention, the method further comprises calculating a temperature sensor heightThe method comprises the following steps: ht＝Ht-1+ 2X π X R × n, wherein HtIs the height of the position where the temperature sensor is located at time t, Ht-1And the height of the position where the temperature sensor is located at the moment t-1, R is the radius of a rotating shaft of the stepping motor, n is the number of rotating circles, and the clockwise rotation is specified to be positive, and the anticlockwise rotation is specified to be negative.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A non-contact high-voltage switch cabinet safety detection device is characterized by comprising a display arranged on the surface of a high-voltage switch cabinet, wherein a two-dimensional code/one-dimensional code image is displayed on the display, and the two-dimensional code/one-dimensional code image contains safety information of the high-voltage switch cabinet; the handheld intelligent equipment comprises a shell, a controller arranged in the shell, a display screen embedded in the front of the shell and a camera arranged on the back of the shell; the image signal output end of the camera is connected with the image signal input end of the controller, and the display output end of the controller is connected with the display input end of the display screen; the device comprises a camera, a controller and a display screen, and is characterized by further comprising an image positioning and transmitting device which is arranged beside the camera and can emit visible light, wherein the working signal output end of the controller is connected with the working signal input end of the image positioning and transmitting device, when the camera scans the two-dimensional code/one-dimensional code image, the visible light emitted by the image positioning and transmitting device is emitted to the two-dimensional code/one-dimensional code image, and the scanned two-dimensional code/one-dimensional code image information is displayed on the display screen.
2. The non-contact high-voltage switch cabinet safety detection system according to claim 1, further comprising a wireless connection module, wherein a wireless connection end of the wireless connection module is connected with a wireless connection end of the controller, and the remote control center is connected with the controller through a network connection module.
3. The safety detection system for the non-contact high-voltage switch cabinet according to claim 1, wherein a live detection device for detecting whether the high-voltage switch cabinet is live is arranged in the high-voltage switch cabinet, and a detection signal output end of the live detection device is connected with a detection signal input end of a controller of the high-voltage switch cabinet.
4. The non-contact high-voltage switch cabinet safety detection system according to claim 1, wherein a temperature sensor for monitoring the internal temperature of the high-voltage switch cabinet is arranged in the high-voltage switch cabinet, a temperature signal output end of the temperature sensor is connected with a temperature signal input end of a high-voltage switch cabinet controller, the system further comprises a lifting mechanism for lifting the height of the temperature sensor, the lifting mechanism comprises a fixed pulley and a stepping motor which are respectively arranged on the inner top surface of the high-voltage switch cabinet through a first support and a second support, a first end of a load line is fixed on the temperature sensor, and a second end of the load line passes through the fixed pulley and then is fixed at a rotating end of the stepping motor;
or/and be provided with the buckle that is used for fixed thermometer on the high tension switchgear door inner face that opens and shuts and be provided with transparent observation window on opening and shutting, the thermometer is fixed on the buckle, and the thermometer scale is observed through the transparent observation window that sets up on opening and shutting, still includes to be provided with the warning layer on transparent observation window.
5. The safety detection system for the non-contact high-voltage switch cabinet according to claim 4, further comprising an A/D conversion module, wherein the temperature signal output end of the temperature sensor is connected with the analog signal input end of the A/D conversion module, and the digital signal output end of the A/D conversion module is connected with the digital signal input end of the controller, so that the analog signal output by the temperature sensor is converted into the digital signal which is input into the controller.
6. A control method of a non-contact high-voltage switch cabinet safety detection system is characterized in that a unique authentication account and an authentication password corresponding to the authentication account are preset on a remote control center, and the method comprises the following steps:
s1, initializing the system, and inputting the number M of authentication account numbersiNumber of authentication password inputs N equal to 0iI is the device ID number 0;
s2, judging whether the input authentication account and the authentication password are the same as the authentication account and the authentication password stored by the remote control center:
if the input authentication account and the authentication password are the same as the authentication account and the authentication password stored in the remote control center, executing step S4;
if the input authentication account number is different from all the authentication account numbers stored in the remote control center, prompting that the authentication account number does not exist, and recording the time as tMRecording the ID number of the equipment for sending the authentication account number as j, Mj＝Mj+1, go to step S3;
if the input authentication password is different from the authentication password corresponding to the authentication account number stored in the remote control center; prompting the wrong input of the authentication password and recording the time as tNRecording the ID number of the equipment for sending the authentication password as j, Nj＝Nj+1, go to step S3;
s3, determining tMOr tNWhether less than or equal to a preset threshold time:
if tMOr tNIf the time is less than or equal to the preset threshold time, and the total number of times of the authentication account number input by the same ID device is greater than or equal to the preset number of times of the authentication account number, or the total number of times of the authentication password input by the same ID device is greater than or equal to the preset number of times of the authentication password, the remote control center does not verify the authentication account number of the ID device, and prompts that the number of times of the authentication account number or the authentication password input by the ID device exceeds the limit, and step S3 is executed;
if tMOr tNIf the time is less than or equal to the preset threshold time, and the total number of times of the authentication account numbers input by all the devices is greater than or equal to the total number of times of the preset authentication account numbers, or the total number of times of the authentication passwords input by all the devices is greater than or equal to the total number of times of the preset authentication passwords, the remote control center does not verify the authentication account numbers of any device, and prompts that the input times of the authentication account numbers or the authentication passwords of the devices exceed the limit, and the step S3 is executed;
if tMOr tNIf the time is longer than the preset threshold value, returning to the step S1;
s4, when information in the one-dimensional code/two-dimensional code is acquired, the information in the one-dimensional code/two-dimensional code comprises safety information of a high-voltage switch cabinet, visible light emitted by an image positioning and emitting device is aligned to the pre-scanned two-dimensional code, and if the two-dimensional code cannot be identified, the two-dimensional code cannot be identified; after the two-dimension code information is successfully acquired, if the high-voltage switch cabinet is electrified, the high-voltage switch cabinet is unsafe, and the high-voltage switch cabinet should be far away from the high-voltage switch cabinet and the input power supply of the high-voltage switch cabinet is turned off; if the high-voltage switch cabinet is safe, the high-voltage switch cabinet can be close to the high-voltage switch cabinet for operation.
7. The control method of the non-contact high-voltage switch cabinet safety detection system according to claim 6, further comprising a high-voltage switch cabinet temperature monitoring method:
s71, initializing the system, and making the judgment times M equal to 0, wherein M is a positive integer;
s72, the controller collects the ith platinum thermal resistance Rt at the t momentVoltage value ofCalculating the resistance of the platinum thermal resistor Rt at the momentIs calculated by the formulaWherein,collecting the voltage value of the ith pre-monitoring point for the controller at the time t,the resistance value of the ith platinum thermal resistor Rt at the moment t, R5, R5, R4, I and the temperature value corresponding to the platinum thermal resistor are obtained by looking up a table, wherein the resistance value of the ith platinum thermal resistor Rt is the resistance value of the resistor R5, the resistance value of the resistor R4 is the resistance value of the resistor I, and the current value output by the constant current source is the value of the;
s73, judging whether the temperature value obtained in the step S72 is larger than or equal to a preset temperature threshold value or not, if so, recording the time as t1 by a timer; if the obtained temperature is continuously greater than or equal to a preset temperature threshold value and the duration is t2, judging whether the duration t2 is greater than or equal to a preset duration threshold value, if the duration t2 is greater than or equal to the preset duration threshold value, controlling the alarm device to give an alarm and setting M to be M +1, and if the duration t2 is less than the preset duration threshold value, not giving the alarm and setting M to be M + 0;
and S74, judging the magnitude of the M value and the preset threshold value in the step S3, if the M value is larger than or equal to the preset threshold value, the alarm device gives an alarm, and if the M value is smaller than the preset threshold value, the alarm device does not give an alarm, and the step S72 is returned.
8. The method for controlling the safety detection system of the non-contact high-voltage switch cabinet according to claim 7, further comprising calculating temperatureA method of sensor height, the method comprising: ht＝Ht-1+ 2X π X R × n, wherein HtIs the height of the position where the temperature sensor is located at time t, Ht-1And the height of the position where the temperature sensor is located at the moment t-1, R is the radius of a rotating shaft of the stepping motor, n is the number of rotating circles, and the clockwise rotation is specified to be positive, and the anticlockwise rotation is specified to be negative.
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Application publication date: 20181225 |