CN114274779B - Device and method for collecting temperature information and controlling early warning of new energy electric vehicle - Google Patents
Device and method for collecting temperature information and controlling early warning of new energy electric vehicle Download PDFInfo
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- CN114274779B CN114274779B CN202210052018.0A CN202210052018A CN114274779B CN 114274779 B CN114274779 B CN 114274779B CN 202210052018 A CN202210052018 A CN 202210052018A CN 114274779 B CN114274779 B CN 114274779B
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Abstract
The application belongs to the technical field of new energy electric vehicles, and discloses a device and a method for collecting temperature information and controlling early warning of the new energy electric vehicle, wherein a battery temperature detection component and a motor temperature detection component of the device for collecting temperature information and controlling early warning of the new energy electric vehicle are respectively connected with a data collector through signals, and the data collector and a voice alarm are respectively connected with a vehicle-mounted controller; the battery temperature detection assembly and the motor temperature detection assembly are respectively provided with a plurality of wireless temperature detectors. According to the application, the battery temperature detection assembly and the motor temperature detection assembly are arranged to detect the temperature parameters of the battery and the motor respectively, and are respectively arranged to be a plurality of wireless temperature detectors, so that the temperatures of different positions of the battery and the motor can be detected, the real-time performance of temperature detection can be effectively improved, the laying of circuits is omitted, and the installation is convenient.
Description
Technical Field
The application belongs to the technical field of new energy electric vehicles, and particularly relates to a device and a method for collecting temperature information and controlling early warning of a new energy electric vehicle.
Background
At present, a new energy electric vehicle is a novel power source vehicle, most new energy electric vehicles adopt electric power as motive power, a high-capacity polymer lithium battery is the first choice, a storage battery can generate heat in the charging and discharging processes, and the service life and the working performance of the lithium battery can be influenced by the overhigh temperature, so that the temperature of a battery main body of the new energy electric vehicle is necessary to be checked. The existing temperature detection device of the new energy electric vehicle is connected through wires, the circuit is complex to lay, and the installation, the disassembly and the replacement are complex.
Some existing temperature detection devices for new energy electric vehicles only detect the temperature of batteries, do not detect the temperature of a motor, cannot protect the operation of the motor, and most of devices for detecting the temperature of the batteries do not detect each battery, so that the detection result is not comprehensive enough.
Through the above analysis, the problems and defects existing in the prior art are as follows: the existing temperature detection mode of the new energy electric vehicle can only detect the temperature of a single detection point, the temperature detection accuracy is low, and the connecting circuit is complex and difficult to install.
Disclosure of Invention
Aiming at the problems existing in the prior art, the application provides a device and a method for collecting temperature information and controlling early warning of a new energy electric vehicle.
The device for collecting and controlling the temperature information of the new energy electric vehicle and carrying out early warning is provided with: the device comprises a battery temperature detection assembly, a motor temperature detection assembly, a data acquisition unit and a voice alarm;
the battery temperature detection assembly and the motor temperature detection assembly are respectively connected with the data acquisition device through signals, and the data acquisition device and the voice alarm are respectively connected with the vehicle-mounted controller through connecting lines;
the battery temperature detection assembly is provided with a plurality of wireless temperature detectors which are arranged at different positions outside the automobile battery;
the motor temperature detection assembly is provided with a plurality of wireless temperature detectors which are arranged at different positions outside the automobile motor.
In one embodiment, the wireless temperature detector is provided with a shell, an annular magnet is embedded at the lower end of the shell, an operation controller, a temperature sensor and a first ZigBee signal transmitter are fixed in the middle of the shell, a detection end of the temperature sensor is positioned in the middle of the annular magnet, the temperature sensor and the first ZigBee signal transmitter are respectively connected with the operation controller through connecting lines, and the first ZigBee signal transmitter is connected with the data collector through wireless signals.
In one embodiment, a storage battery is fixed in the shell, a charging port is embedded at the outer end of the shell, and the inner side of the charging port is connected with the storage battery through a connecting circuit;
a buzzer is fixed on the inner side of the shell, and the buzzer is connected with the operation controller through a connecting circuit.
In one embodiment, the data acquisition device is provided with an installation box, a singlechip, a second ZigBee signal transmitter and a memory are arranged on the inner side of the installation box, and the singlechip is connected with the second ZigBee signal transmitter and the memory through connecting lines.
In one embodiment, a plurality of mounting plates are fixed on the bottom edge of the mounting box through screws, and a strip-shaped fixing hole is formed in the middle of each mounting plate; the GSM remote signal transmitter is fixed on the inner side of the installation box and is connected with the singlechip through a connecting line.
Another object of the present application is to provide a new energy electric vehicle set temperature information acquisition and early warning control method for implementing the new energy electric vehicle set temperature information acquisition and early warning control device, where the new energy electric vehicle set temperature information acquisition and early warning control method includes:
the voice alarm and the data acquisition device are respectively connected with a vehicle-mounted controller of the electric automobile, and the data acquisition device is fixed through the mounting plate and the strip-shaped fixing hole; the wireless temperature detectors are respectively arranged at different positions on the surfaces of the automobile battery and the automobile motor and are adsorbed and fixed through the annular magnet; detecting temperature parameters of the battery and the motor respectively;
the temperature sensor collects temperature data, the collected temperature data are transmitted to the data collector through the first ZigBee signal transmitter and the second ZigBee signal transmitter, the data collector transmits the collected data to the vehicle-mounted controller for detection and locally stores the data through the memory, and when the vehicle-mounted controller detects that the temperature data are abnormal, the abnormal state is timely subjected to voice alarm reminding through the voice alarm;
the running controller in the wireless temperature detector detecting the abnormality controls the buzzer to give out alarm sound, and the fault point is determined in time.
In one embodiment, the method for detecting whether the temperature data is abnormal by the vehicle-mounted controller comprises the following steps:
(1) The vehicle-mounted controller firstly selects a temperature random number s' epsilon Z p For i ε {1, …, l }, λ 'is randomly chosen' i ,γ′ i ∈Z p The temperature parameters of the battery and motor were calculated as follows:
outputting temperature parameters CT of partially processed battery and motor out ＝{s′,C 0 ,(C i,1 ,C i,2 ,λ′ i ,γ′ i ) i∈{1,…,l} }；
(2) The temperature parameter calculation chip of the vehicle-mounted controller receives CT out After that, it will verify whether the result is correct, first checkWhether or not to establish; if not, directly outputting b=0, wherein the result of the calculation is incorrect; otherwise, for i e {1, …, l }, the temperature parameter calculation chip of the vehicle-mounted controller calculates:
t i ＝(aλ′ i -v ρ(i) ·γ i -H(ρ(i))·γ i )mod p；
then, a security parameter r is selected, and s is randomly selected 1 ,…,s l ∈{0,1} r CA selects a random number a epsilon Z again p And (3) calculating:
if it isOutput b=1, indicating that the calculation result is correct; otherwise, outputting b=0, representing a result error;
(3) The temperature parameter calculation chip of the vehicle-mounted controller verifies CT out After the result is correct, the rest processing operation is continuously completed, so that A represents a matrix of l multiplied by n, and l is the total number of attributes; the function rho maps each row of the matrix into an attribute, and a temperature parameter calculation chip of the vehicle-mounted controller firstly selects a random number s epsilon Z equal to a set value p And a random vectorWherein y is 2 ,…,y n Is used to share s; for i ε {1, …, l }, calculate +.>A i Represents the ith row of matrix a; then, gamma is selected randomly 1 ,γ 2 ,…,γ l ∈Z p And the temperature parameters of the battery and motor are calculated as follows:
wherein C', C i,3 ,C i,4 For correcting s, lambda i ,γ i ；C v For verifying the processed result; g 1 ，g 2 Is G 1 ，G 2 Finally, the temperature parameters CT= { C, C', C of the complete battery and motor are output 0 ,(C i,1 ,C i,2 ,C i,3 ,C i,4 ) i∈{1,…,l} ,C v ,(A,ρ)}。
In one embodiment, the method of determining a failure point includes:
μ k d k Respectively representing the delay from the wireless temperature detector to the operation controller and the delay from the operation controller to the actuator caused by the temperature detection network, respectively taking values in a finite set gamma= {0, …, mu }, theta= {0, …, d }, and respectively obtaining a transition probability matrix of G= [ lambda ] ij ]，H＝[π rs ]，λ ij And pi rs The following are provided:
λ ij ＝Prob{μ k+1 ＝j|μ k ＝i},π rs ＝Prob{d k+1 ＝s|d k ＝r}
lambda in ij ≥0，
Random variable alpha with value of {0,1} k ,β k Respectively representing the data packet loss from the wireless temperature detector to the operation controller and from the operation controller to the executor, and representing successful data packet transmission when the random variable value is 1; otherwise, the data packet transmission failure is indicated, and the following characteristics are satisfied:
Prob{α k ＝1}＝E{α k }＝a,
Prob{α k ＝0}＝1-a,
Var{α k }＝E{(α k -a) 2 }＝(1-a)a＝b 2 ,
Prob{β k ＝1}＝E{β k }＝c,
Prob{β k ＝0}＝1-c,
Var{β k }＝E{(β k -c) 2 }＝(1-c)c＝e 2 ,
wherein Prob { · } and E { · } are probability, expectation and variance, and a, b and E are positive real numbers, respectively;
the temperature detection network state equation is as follows:
wherein x is k ∈R w Is a vector of the state of the system,is a system control input vector, y k ∈R g Is the system measurement output vector, f k ∈R p Is a system fault signal d k ∈R q External interference signal A of limited energy p ，B p ，B d ，B f ，C f Is a steady matrix of appropriate dimensions.
In one embodiment, a fault detector is configured at the run controller side:
wherein the method comprises the steps ofIs a fault detector state vector,/->Is the fault detector output vector, r k ∈R q Is the residual vector, V is the residual gain matrix, and L is the pending residual gain matrix.
In one embodiment, the fault detector receives the system outputAnd a control input applied to the controlled object +.>Expressed as:
the following feedback control law is adopted:
the following state estimation errors and residual errors are defined:
r ek ＝r k -f k
definition of augmentation vectorsThe closed loop system equation is obtained as follows:
wherein the method comprises the steps of
C＝[0 -C p ],I 1 ＝I -I∈R n×2n ,
I 3 ＝0 I∈R q×(p+q) 。
By combining all the technical schemes, the application has the advantages and positive effects that:
according to the application, the battery temperature detection assembly and the motor temperature detection assembly are arranged, so that the temperature parameters of the battery and the motor can be detected respectively, the detection is comprehensive, and the abnormal state can be timely subjected to voice alarm reminding through the voice alarm; through setting up battery temperature detection component and motor temperature detection component into a plurality of wireless temperature detector respectively, can detect the temperature of the different positions of battery and motor, can effectively improve the instantaneity that the temperature detected, guarantee the degree of accuracy and the reliability of testing result, save the laying of circuit moreover, simple to operate.
The wireless temperature detector can be quickly and fixedly installed through the annular magnet, the ZigBee signal transmitter is utilized for signal transmission, so that the power consumption can be effectively reduced, the service time is prolonged, the electric quantity of the internal storage battery can be conveniently supplemented through the charging port, the alarm sound can be sent out when the temperature is too high through the buzzer, and the confirmation of the alarm point position is facilitated.
The data acquisition device can utilize the memory to store the circulating data, realize the local storage of the detection data, facilitate the fixation of the mounting box through the mounting plate and the strip-shaped fixing holes, send the detection result to a remote monitoring terminal through the GSM remote signal transmitter, and realize the remote monitoring.
The application obtains the comprehensive mathematical model of the temperature detection network which simultaneously comprises the delay from the wireless temperature detector to the operation controller, the packet loss, the delay from the operation controller to the executor and the packet loss, has important theoretical significance for perfecting the temperature control theory, and simultaneously, the fault detector collaborative design method and practice can sensitively detect the fault existing based on the temperature, namely the abnormality, and has important practical significance for reducing the loss caused by the fault and improving the product quality.
The intelligent control of the vehicle-mounted controller provides technical support for temperature anomaly detection and data processing.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a device for collecting temperature information and controlling early warning of a new energy electric vehicle according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a wireless temperature detector according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a data collector according to an embodiment of the present application.
Fig. 4 is a schematic diagram of the internal structure of a wireless temperature detector according to an embodiment of the present application.
Fig. 5 is a flowchart of a new energy electric vehicle set temperature information acquisition and early warning control method provided by the embodiment of the application.
In the figure: 1. a battery temperature detection assembly; 2. a voice alarm; 3. a vehicle-mounted controller; 4. a motor temperature detection assembly; 5. an automotive motor; 6. a data collector; 7. an automotive battery; 8. a housing; 9. a ring-shaped magnet; 10. a run controller; 11. a temperature sensor; 12. a first ZigBee signal transmitter; 13. a storage battery; 14. a charging port; 15. a buzzer; 16. a mounting box; 17. a single chip microcomputer; 18. a second ZigBee signal transmitter; 19. a memory; 20. a mounting plate; 21. a long fixing hole; 22. GSM remote signal transmitter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in detail in one embodiment with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Aiming at the problems existing in the prior art, the application provides a device and a method for collecting temperature information and controlling early warning of a new energy electric vehicle, and the application is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the device for collecting temperature information and controlling early warning of a new energy electric vehicle provided by the embodiment of the application comprises: battery temperature detection component 1, voice alarm 2, on-vehicle controller 3, motor temperature detection component 4 and data acquisition ware 6.
The battery temperature detection assembly 1 and the motor temperature detection assembly 4 are respectively connected with the data acquisition unit 6 through signals, and the data acquisition unit 6 and the voice alarm 2 are respectively connected with the vehicle-mounted controller 3 through connecting lines; the battery temperature detection assembly 1 is provided with a plurality of wireless temperature detectors which are arranged at different positions outside the automobile battery 7; the motor temperature detection assembly 4 is provided with a plurality of wireless temperature detectors which are arranged at different positions outside the automobile motor 5.
As shown in fig. 2, the wireless temperature detector in the embodiment of the application is provided with a shell 8, an annular magnet 9 is embedded at the lower end of the shell 8, an operation controller 10, a temperature sensor 11 and a first ZigBee signal transmitter 12 are fixed in the middle of the shell 8, the detection end of the temperature sensor 11 is positioned in the middle of the annular magnet 9, the temperature sensor 11 and the first ZigBee signal transmitter 12 are respectively connected with the operation controller 10 through connection lines, and the first ZigBee signal transmitter 12 is connected with the data collector 6 through wireless signals. The ring magnet 9 can be quickly and fixedly installed, and the ZigBee signal transmitter is utilized for signal transmission, so that the power consumption can be effectively reduced, and the service time can be prolonged. The battery 13 is fixed in the shell 8, a charging port 14 is embedded at the outer end of the shell 8, and the inner side of the charging port 14 is connected with the battery 13 through a connecting circuit. The charge port 14 can facilitate the replenishment of the internal storage battery 13 with electric power. A buzzer 15 is fixed on the inner side of the shell 8, and the buzzer 15 is connected with the operation controller 10 through a connecting line. The buzzer 15 can give out alarm sound when the temperature is too high, so that the alarm point position can be conveniently confirmed.
As shown in fig. 3 and 4, the data collector 6 in the embodiment of the application is provided with a mounting box 16, a plurality of mounting plates 20 are fixed on the bottom edge of the mounting box 16 through screws, and a strip-shaped fixing hole 21 is formed in the middle of each mounting plate 20. The mounting plate 20 and the elongated fixing holes 21 facilitate the fixation of the mounting case 16. The inside of the mounting box 16 is provided with a singlechip 17, a second ZigBee signal transmitter 18 and a memory 19, and the singlechip 17 is connected with the second ZigBee signal transmitter 18 and the memory 19 through connecting lines. The memory 19 may be used for cyclic data storage to enable local storage of the test data. The inside of the mounting box 16 is also fixed with a GSM remote signal transmitter 22, and the GSM remote signal transmitter 22 is connected with the singlechip 17 through a connecting line. The detection result can be sent to a remote monitoring terminal through the GSM remote signal transmitter 22, so that remote monitoring can be realized.
The technical scheme of the application is further described below with reference to specific embodiments.
Example 1
The application provides a vehicle-mounted controller 3, and a method for detecting whether temperature data is abnormal by the vehicle-mounted controller 3 comprises the following steps:
(1) The vehicle controller 3 first selects a temperature random number s' ∈z p For i ε {1, …, l }, λ 'is randomly chosen' i ,γ′ i ∈Z p The temperature parameters of the battery and motor were calculated as follows:
outputting temperature parameters CT of partially processed battery and motor out ＝{s′,C 0 ,(C i,1 ,C i,2 ,λ′ i ,γ′ i ) i∈{1,…,l} }；
(2) The temperature parameter calculation chip of the vehicle-mounted controller 3 receives CT out After that, it will verify whether the result is correct, first checkWhether or not to establish; if not, directly outputting b=0, wherein the result of the calculation is incorrect; otherwise, for i e {1, …, l }, the temperature parameter calculation chip of the in-vehicle controller 3 calculates:
t i ＝(aλ′ i -v ρ(i) ·γ i -H(ρ(i))·γ i )mod p；
then, a security parameter r is selected, and s is randomly selected 1 ,…,s l ∈{0,1} r CA selects a random number a epsilon Z again p And (3) calculating:
if it isOutput b=1, indicating that the calculation result is correct; otherwise, outputting b=0, representing a result error;
(3) The temperature parameter calculation chip of the vehicle-mounted controller 3 verifies CT out After the result is correct, the rest processing operation is continuously completed, so that A represents a matrix of l multiplied by n, and l is the total number of attributes; the function ρ maps each row of the matrix into an attribute, and the temperature parameter calculation chip of the vehicle-mounted controller 3 first selects a random number s e Z equal to the set value p And a random vectorWherein y is 2 ,…,y n Is used to share s; for i ε {1, …, l }, calculateA i Represents the ith row of matrix a; then, gamma is selected randomly 1 ,γ 2 ,…,γ l ∈Z p And the temperature parameters of the battery and motor are calculated as follows:
wherein C', C i,3 ,C i,4 For correcting s, lambda i ,γ i ；C v For verifying the processed result; g 1 ，g 2 Is G 1 ，G 2 Finally, the temperature parameters CT= { C, C', C of the complete battery and motor are output 0 ,(C i,1 ,C i,2 ,C i,3 ,C i,4 ) i∈{1,…,l} ,C v ,(A,ρ)}。
Example 2
As shown in fig. 5, the application provides a new energy electric vehicle set temperature information acquisition and early warning control method, which comprises the following steps:
s101, the voice alarm 2 and the data collector 6 are respectively connected with the vehicle-mounted controller 3 of the electric automobile, and the data collector 6 is fixed through the mounting plate 20 and the strip-shaped fixing hole 21. A plurality of wireless temperature detectors are respectively arranged on different positions of the surfaces of the automobile battery 7 and the automobile motor 5, and are adsorbed and fixed through the annular magnet 9. The temperature parameters of the battery and the motor can be detected respectively, and the detection is comprehensive.
S102, the temperature sensor 11 collects temperature data, the collected temperature data are transmitted to the data collector 6 through the first ZigBee signal transmitter 12 and the second ZigBee signal transmitter 18, the data collector 6 transmits the collected data to the vehicle-mounted controller 3 to be detected and stored locally through the memory 19, and when the vehicle-mounted controller 3 detects that the temperature data are abnormal, the abnormal state can be timely subjected to voice alarm reminding through the voice alarm 2.
S103, the running controller 10 in the wireless temperature detector with the abnormality detected controls the buzzer 15 to give out an alarm sound, so that maintenance personnel can determine the fault point in time.
Example 3
Based on embodiment 2, the method of determining the failure point includes:
μ k d k Respectively representing the delay from the wireless temperature detector to the vehicle-mounted controller 3 and the delay from the vehicle-mounted controller 3 to the actuator caused by the temperature detection network, respectively taking values in a limited set gamma= {0, …, mu }, theta= {0, …, d } and respectively obtaining a transition probability matrix G= [ lambda ] ij ]，H＝[π rs ]，λ ij And pi rs The following are provided:
λ ij ＝Prob{μ k+1 ＝j|μ k ＝i},π rs ＝Prob{d k+1 ＝s|d k ＝r}
lambda in ij ≥0，
Random variable alpha with value of {0,1} k ,β k Respectively indicating that the data packets between the wireless temperature detector and the vehicle-mounted controller 3 and between the vehicle-mounted controller 3 and the executor are lost, and indicating that the data packet transmission is successful when the random variable value is 1; otherwise, the data packet transmission failure is indicated, and the following characteristics are satisfied:
Prob{α k ＝1}＝E{α k }＝a,
Prob{α k ＝0}＝1-a,
Var{α k }＝E{(α k -a) 2 }＝(1-a)a＝b 2 ,
Prob{β k ＝1}＝E{β k }＝c,
Prob{β k ＝0}＝1-c,
Var{β k }＝E{(β k -c) 2 }＝(1-c)c＝e 2 ,
wherein Prob { · } and E { · } are probability, expectation and variance, and a, b and E are positive real numbers, respectively;
the temperature detection network state equation is as follows:
wherein x is k ∈R w Is a vector of the state of the system,is a system control input vector, y k ∈R g Is the system measurement output vector, f k ∈R p Is a system fault signal d k ∈R q External interference signal A of limited energy p ，B p ，B d ，B f ，C f Is a steady matrix of appropriate dimensions.
Preferably, the fault detector is configured at the in-vehicle controller 3 side:
wherein the method comprises the steps ofIs a fault detector state vector,/->Is the fault detector output vector, r k ∈R q Is the residual vector, V is the residual gain matrix, and L is the pending residual gain matrix.
Preferably, the system output received by the fault detectorAnd a control input applied to the controlled object +.>Expressed as:
the following feedback control law is adopted:
the following state estimation errors and residual errors are defined:
r ek ＝r k -f k
definition of augmentation vectorsThe closed loop system equation is obtained as follows:
wherein the method comprises the steps of
C＝[0 -C p ],I 1 ＝I -I∈R n×2n ,
I 3 ＝0 I∈R q×(p+q) 。
The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the application is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present application will be apparent to those skilled in the art within the scope of the present application.
Claims (8)
1. The new energy electric vehicle set temperature information acquisition and early warning control method is characterized by being applied to a new energy electric vehicle set temperature information acquisition and early warning device, and comprises the following steps of:
the voice alarm and the data acquisition device are respectively connected with a vehicle-mounted controller of the electric automobile, and the data acquisition device is fixed through the mounting plate and the strip-shaped fixing hole; the wireless temperature detectors are respectively arranged at different positions on the surfaces of the automobile battery and the automobile motor and are adsorbed and fixed through the annular magnet; detecting temperature parameters of the battery and the motor respectively;
the temperature sensor collects temperature data, the collected temperature data are transmitted to the data collector through the first ZigBee signal transmitter and the second ZigBee signal transmitter, the data collector transmits the collected data to the vehicle-mounted controller for detection and locally stores the data through the memory, and when the vehicle-mounted controller detects that the temperature data are abnormal, the abnormal state is timely subjected to voice alarm reminding through the voice alarm;
an operation controller in the wireless temperature detector detecting the abnormality controls a buzzer to give out alarm sounds, and fault points are determined in time;
the method for detecting whether the temperature data is abnormal by the vehicle-mounted controller comprises the following steps:
(1) The vehicle-mounted controller firstly selects a temperature random number s' epsilon Z p For i ε {1, …, l }, λ 'is randomly chosen' i ,γ′ i ∈Z p The temperature parameters of the battery and motor were calculated as follows:
outputting temperature parameters CT of partially processed battery and motor out ＝{s′,C 0 ,(C i,1 ,C i,2 ,λ′ i ,γ′ i ) i∈{1,…,l} }；
(2) The temperature parameter calculation chip of the vehicle-mounted controller receives CT out After that, it will verify whether the result is correct, first checkWhether or not to establish; if not, directly outputting b=0, wherein the result of the calculation is incorrect; otherwise, for i e {1, …, l }, the temperature parameter calculation chip of the vehicle-mounted controller calculates:
t i ＝(aλ′ i -v ρ(i) ·γ i -H(ρ(i))·γ i )mod p；
then, a security parameter r is selected, and s is randomly selected 1 ,…,s l ∈{0,1} r CA selects a random number a epsilon Z again p And (3) calculating:
if it isOutput b=1, indicating that the calculation result is correct; otherwise, outputting b=0, representing a result error;
(3) The temperature parameter calculation chip of the vehicle-mounted controller verifies CT out After the result is correct, the rest processing operation is continuously completed, so that A represents a matrix of l multiplied by n, and l is the total number of attributes; the function rho maps each row of the matrix into an attribute, and a temperature parameter calculation chip of the vehicle-mounted controller firstly selects a random number s epsilon Z equal to a set value p And a random vectorWherein y is 2 ,…,y n Is used to share s; for i ε {1, …, l }, calculate +.>A i Represents the ith row of matrix a; then, gamma is selected randomly 1 ,γ 2 ,…,γ l ∈Z p And the temperature parameters of the battery and motor are calculated as follows:
wherein C', C i,3 ,C i,4 For correcting s, lambda i ,γ i ；C v For verifying the processed result; g 1 ，g 2 Is G 1 ，G 2 Finally, the temperature parameters CT= { C, C', C of the complete battery and motor are output 0 ,(C i,1 ,C i,2 ,C i,3 ,C i,4 ) i∈{1,…,l} ,C v ,(A,ρ)}；
The device for collecting temperature information and controlling early warning of the new energy electric vehicle is provided with: the device comprises a battery temperature detection assembly, a motor temperature detection assembly, a data acquisition unit and a voice alarm;
the battery temperature detection assembly and the motor temperature detection assembly are respectively connected with the data acquisition device through signals, and the data acquisition device and the voice alarm are respectively connected with the vehicle-mounted controller through connecting lines;
the battery temperature detection assembly is provided with a plurality of wireless temperature detectors which are arranged at different positions outside the automobile battery;
the motor temperature detection assembly is provided with a plurality of wireless temperature detectors which are arranged at different positions outside the automobile motor.
2. The new energy electric vehicle temperature information collection and early warning control method according to claim 1, wherein the wireless temperature detector is provided with a shell, an annular magnet is embedded at the lower end of the shell, an operation controller, a temperature sensor and a first ZigBee signal transmitter are fixed in the middle of the shell, the detection end of the temperature sensor is positioned in the middle of the annular magnet, the temperature sensor and the first ZigBee signal transmitter are respectively connected with the operation controller through connecting lines, and the first ZigBee signal transmitter is connected with the data collector through wireless signals.
3. The method for collecting and pre-warning temperature information of the new energy electric vehicle according to claim 2, wherein a storage battery is fixed in the shell, a charging port is embedded at the outer end of the shell, and the inner side of the charging port is connected with the storage battery through a connecting line;
a buzzer is fixed on the inner side of the shell, and the buzzer is connected with the operation controller through a connecting circuit.
4. The method for collecting and pre-warning temperature information of the new energy electric vehicle according to claim 1, wherein the data collector is provided with an installation box, a single chip microcomputer, a second ZigBee signal transmitter and a memory are arranged on the inner side of the installation box, and the single chip microcomputer is connected with the second ZigBee signal transmitter and the memory through connecting lines.
5. The method for collecting and pre-warning temperature information of the new energy electric vehicle according to claim 4, wherein a plurality of mounting plates are fixed on the bottom edge of the mounting box through screws, and a strip-shaped fixing hole is formed in the middle of each mounting plate; the GSM remote signal transmitter is fixed on the inner side of the installation box and is connected with the singlechip through a connecting line.
6. The method for collecting and pre-warning temperature information of the new energy electric vehicle according to claim 1, wherein the method for determining the fault point comprises the following steps:
μ k d k Respectively representing the delay from the wireless temperature detector to the operation controller and the delay from the operation controller to the actuator caused by the temperature detection network, respectively taking values in a finite set gamma= {0, …, mu }, theta= {0, …, d }, and respectively obtaining a transition probability matrix of G= [ lambda ] ij ]，H＝[π rs ]，λ ij And pi rs The following are provided:
λ ij ＝Prob{μ k+1 ＝j|μ k ＝i},π rs ＝Prob{d k+1 ＝s|d k ＝r}
lambda in ij ≥0，
Random variable alpha with value of {0,1} k ,β k Respectively representing the data packet loss from the wireless temperature detector to the operation controller and from the operation controller to the executor, and representing successful data packet transmission when the random variable value is 1; otherwise, the data packet transmission failure is indicated, and the following characteristics are satisfied:
Prob{α k ＝1}＝E{α k }＝a,
Prob{α k ＝0}＝1-a,
Var{α k }＝E{(α k -a) 2 }＝(1-a)a＝b 2 ,
Prob{β k ＝1}＝E{β k }＝c,
Prob{β k ＝0}＝1-c,
Var{β k }＝E{(β k -c) 2 }＝(1-c)c＝e 2 ,
wherein Prob { · } and E { · } are probability, expectation and variance, and a, b and E are positive real numbers, respectively;
the temperature detection network state equation is as follows:
wherein x is k ∈R w Is a vector of the state of the system,is a system control input vector, y k ∈R g Is the system measurement output vector, f k ∈R p Is a system fault signal d k ∈R q External interference signal A of limited energy p ，B p ，B d ，B f ，C f Is a steady matrix of appropriate dimensions.
7. The new energy electric vehicle temperature information collection and early warning control method according to claim 1, wherein a fault detector is constructed at an operation controller end:
wherein the method comprises the steps ofIs a fault detector state vector,/->Is the fault detector output vector, r k ∈R q Is the residual vector, V is the residual gain matrix, and L is the pending residual gain matrix.
8. The method for collecting and pre-warning temperature information of new energy electric vehicle according to claim 7, wherein the system output received by the fault detectorAnd a control input applied to the controlled object +.>Expressed as:
the following feedback control law is adopted:
the following state estimation errors and residual errors are defined:
r ek ＝r k -f k
definition of augmentation vectorsThe closed loop system equation is obtained as follows:
wherein the method comprises the steps of
C＝[0-C p ],I 1 ＝I-I∈R n×2n ,
I 3 ＝0I∈R q×(p+q) 。
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