CN112113683B - Real-time corpse temperature measuring, recording and analyzing instrument and death time analyzing method - Google Patents
Real-time corpse temperature measuring, recording and analyzing instrument and death time analyzing method Download PDFInfo
- Publication number
- CN112113683B CN112113683B CN202010811139.XA CN202010811139A CN112113683B CN 112113683 B CN112113683 B CN 112113683B CN 202010811139 A CN202010811139 A CN 202010811139A CN 112113683 B CN112113683 B CN 112113683B
- Authority
- CN
- China
- Prior art keywords
- temperature
- time
- cadaver
- death
- corpse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- 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
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Data Mining & Analysis (AREA)
- Mathematical Physics (AREA)
- Mathematical Optimization (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Analysis (AREA)
- Pure & Applied Mathematics (AREA)
- Computational Mathematics (AREA)
- Algebra (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Operations Research (AREA)
- Life Sciences & Earth Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Bioinformatics & Computational Biology (AREA)
- Evolutionary Biology (AREA)
- Probability & Statistics with Applications (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention provides a cadaver temperature real-time measurement recording analyzer and a death time analysis method, which comprise a host and at least one temperature probe; the host is integrated with a processing unit, a storage unit, a display screen and an environment temperature and humidity sensor; the temperature probe is in a round bar shape and is connected to a first signal acquisition end of the processing unit through a signal wire; the output end of the environment temperature and humidity sensor is connected to a second signal acquisition end of the processing unit; the display screen is used for displaying the current ambient temperature T 1 Environmental humidity, carcass temperature T obtained by current temperature probe 2 And calculating the resulting time to death X. Compared with the prior art, the method integrates other influence factors such as the corpse temperature, the environment temperature and the like, and obtains more reliable death time through fast and automatic calculation.
Description
Technical Field
The invention belongs to the field of corpse temperature measurement and analysis, and particularly relates to a corpse temperature real-time measurement and recording analyzer and a death time analysis method.
Background
The time to death, also known as death elapsed time (forensic terminology), refers to the time from the death occurring to the time of the forensic examination. The inference of time to death is the first problem to be solved in forensic identification. The death time has great significance for determining case sending time, identifying and eliminating criminal suspects and defining a detection range, and especially is important for accurately identifying the death time when cases relate to a plurality of criminal suspects.
Currently, common methods for inferring death time are: the indexes of corpse, corpse spots, degree of corneal opacity, gastric contents, corpse cold and the like are provided, wherein the methods of corpse spots, degree of corneal opacity and the like are mainly deduced by the working experience of forensic doctors, and the influence of individual difference is large; the gastric content inference method is easily influenced by factors such as food types and shapes, food intake, gastrointestinal functions and the like and case investigation results; the corpse temperature changes along with the external environment, the change rule of the corpse temperature has better correlation with the elapsed time after death, so the corpse temperature is regarded as a scientific index for deducing early death time, the rectal temperature can better reflect the internal temperature of the corpse and is easy to measure, and therefore, in actual case handling, the death time is deduced by using the rectal temperature.
At present, two methods for calculating death time relatively accurately by adopting cadaver temperature are mainly adopted: the method has the main defects that the method firstly needs to determine the approximate death time range before calculation, and then selects a corresponding formula for calculation; secondly, the method has numerous calculation formulas and is complicated in practical application; the other is a rectal temperature line graph method and a formula thereof provided by professor Henssgec of Law of medical research institute of Essen university in Germany, the method is a method which is recognized to be more accurate and objective at present, the method is obtained based on Newton's cooling law through research, but the initial stage of a cadaver temperature decline curve does not completely accord with the Newton's cooling law, and the method does not fully consider the specific plateau phase of the cadaver cooling curve. And both of the above methods are the conclusions that expert scholars concluded from the data of actual cases in the eighty-ninety years of the last century. Due to condition limitation, the current measuring tool has low precision and large error, and can not monitor the temperature change of the corpse in real time and accurately reflect the change rule of the corpse.
Disclosure of Invention
Therefore, the invention provides a cadaver temperature real-time measuring and recording analyzer, which adopts the technical scheme that:
the real-time corpse temperature measuring, recording and analyzing instrument comprises a host and at least one temperature probe; the host is integrated with a processing unit, a storage unit, a display screen and an environment temperature and humidity sensor; the temperature probe is in a round bar shape and is connected to a first signal acquisition end of the processing unit through a signal wire; the output end of the environment temperature and humidity sensor is connected to the second signal acquisition end of the processing unit; the display screen is used for displaying the current ambient temperature T 1 Environmental humidity, carcass temperature T obtained by current temperature probe 2 And calculating the resulting time to death X;
the storage unit stores a first program, and the first program realizes the following steps after being loaded by the processing unit:
1) Data operation
X＝K*t：
t: inferring a time of death; k: a correction factor, defaulted to 1;
when T is 2 T = T plateau, = 37.2;
when the temperature is higher than the set temperature
When the temperature of the water is higher than the set temperature,
when in use
When the temperature of the water is higher than the set temperature,
T platform : carcass temperature plateau time;
T half-decay : the temperature difference between the corpse and the environment is reduced by half; t is Half-decay ＝12-T Platform ；
2) Result output
Outputting a display command to display the current ambient temperature T on the display screen 1 Environmental humidity, carcass temperature T obtained by current temperature probe 2 And calculating the resulting time to death X.
Preferably, the storage unit stores a second program, and the processing unit implements the following steps after being loaded:
responding to an instruction which is input by a user and requires to adjust the correction coefficient, and enabling a modification picture of the correction coefficient to be displayed on the display screen;
receiving a correction coefficient input and confirmed by a user;
and substituting the correction coefficient input and confirmed by the user into the corresponding calculation formula X = K × t in the first program, and re-executing the first program.
Preferably, there are two of the temperature probes.
Preferably, the temperature probe is marked with a scale for a user to observe the depth of penetration of the probe into the cadaver.
Preferably, the head of the temperature probe is gradually reduced in diameter and rounded at the top end.
Preferably, the host is further provided with a data transmission interface for exporting data and/or receiving instructions.
Preferably, when T is 2 And when =37.2, the death time X is displayed on the display screen, and the specific display information is that the death time is 0-t hours.
Preferably, the display screen is a touch display screen.
The invention also provides a method for analyzing death time according to corpse temperature, which adopts a program stored in a storage unit of the corpse temperature real-time measuring and recording analyzer, and the program is realized after being operated by a processing unit.
Compared with the prior art, the invention has the following beneficial effects:
the device integrates other influence factors such as the corpse temperature, the environment temperature and the like, and the more reliable death time is obtained through rapid and automatic calculation.
Based on the invention, through continuous measurement, the death time can be obtained by considering repeated measurement and display calculation at intervals, then the reduction rate and the change rule of the carcass temperature are generated, and the result is corrected by contrasting a typical curve of the carcass temperature change rule, thereby more scientifically and accurately calculating the death time.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings without inventive labor.
FIG. 1 is a graph showing the temperature drop law of a cadaver;
fig. 2 is a schematic hardware composition diagram of the cadaver temperature real-time measurement recording analyzer in this embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a graph showing the temperature drop law of the corpse, as shown in fig. 1: the early death time is deduced based on the falling rule of the temperature of the corpse. The principle is as follows: when the victim dies, the heat energy in the body is firstly conducted to the body surface and then dissipated from the body surface in a conduction and radiation mode until the temperature of the body is equal to the ambient temperature. After the death of the human body, the tissue cells do not die immediately, the cell metabolism can still continue for a period of time, the temperature of the dead rectum does not drop immediately and presents a transient platform period which is called a dead rectum temperature platform, after the transient platform period, the heat dissipation process is initially slower, gradually quickens and reaches the maximum speed, and finally slows down again until reaching the ambient temperature, and the Newton's cooling law is followed.
"half-life" refers to the time required for the radioactive atom to decay to half its original number, and later "half-life" is extended to drug concentration reduction calculations.
With the progress and development of scientific means and informatization technology, temperature measuring instruments are continuously updated, a real-time temperature detection recording instrument (recording once every minute) is used, the resolution precision reaches 0.1, and the corpse temperature change rule is objectively and accurately recorded.
In an animal experiment for deducing death time by using advanced instruments and equipment, the carcass temperature reduction rule is found to be in accordance with a half-life period rule, and the concept of 'carcass temperature reduction half-life period' is found and extracted for the first time.
The time consumption is basically the same for every reduction of the temperature of the corpse (corpse temperature-ambient temperature)/2, so that the same time consumed for every reduction of the temperature by 1/2 of the difference between the temperature of the corpse and the ambient temperature is called as 'temperature reduction half-life'.
We studied the dead body temperature change law experimentally by animals (4 kg rabbit, once per minute measurement record), with the following experimental data at ambient temperatures of 2 deg.C, 8 deg.C, 13 deg.C, 18 deg.C, 24 deg.C, and 27 deg.C:
firstly, the method comprises the following steps: the ambient temperature at 2 ℃ is shown in table 1: (in view of the large amount of data, some intermediate values were deleted and temperature values per 1 ℃ drop were retained)
TABLE 1
Through experiments, we can find that:
1. (cadaver initial temperature-ambient temperature)/2 = (40.7-2)/2 = (19.35)
2. About 470 minutes from 40.7 to 21.35 (drop 19.35);
3. about 460 minutes was taken to decrease from 21.35 to 11.68 (decrease 9.67);
4. it took about 440 minutes to go from 11.68 to 6.85 (4.83 drop).
II, secondly: the ambient temperature at 8 ℃ is shown in table 2: (in view of the large amount of data, some intermediate values were deleted and temperature values per 1 ℃ drop were retained)
TABLE 2
Through experiments, we can find that:
1. (initial temperature of carcass-ambient temperature)/2 = (40.2-8)/2 =16.1
2. About 480 minutes to go from 40.2 to 24.1 (16.1 drop);
3. about 490 minutes to go from 24.1 to 16.05 (drop 8.05);
4. the drop from 16.05 to 12.025 (4.025 drop) took about 470 minutes.
Thirdly, the method comprises the following steps: the 13 ℃ ambient temperature is shown in table 3: (in view of the large amount of data, some intermediate values were deleted and the value of temperature per 1 ℃ drop was retained)
TABLE 3
Through experiments, we can find that:
1. (initial carcass temperature-ambient temperature)/2 = (40.1-13)/2 =13.55
2. About 330 minutes was spent to go from 40.1 to 26.55 (13.55 drop);
3. about 320 minutes from 26.55 to 19.78 (drop 6.77);
4. it took about 340 minutes to go from 19.78 to 16.39 (3.385 drop).
Fourthly, the method comprises the following steps: the ambient temperature at 18 ℃ is shown in table 4: (in view of the large amount of data, some intermediate values were deleted and temperature values per 1 ℃ drop were retained)
TABLE 4
Through experiments, we can find that:
1. (initial temperature of carcass-ambient temperature)/2 = (41-18)/2 =11.5
2. About 480 minutes to decrease from 40.1 to 28.6 (decrease 11.5);
3. it took about 490 minutes to go from 28.6 to 22.85 (5.75 drop)
4. It took about 530 minutes to decrease from 22.85 to 19.98 (decrease 2.87)
Fifthly: ambient temperature at 23 ℃ is shown in table 5: (in view of the large amount of data, some intermediate values were deleted and the value of temperature per 1 ℃ drop was retained)
TABLE 5
Through experiments, we can find that:
1. (cadaver initial temperature-ambient temperature)/2 = (40.2-23)/2 =8.6
2. About 290 minutes is spent to go from 40.2 to 31.6 (drop 8.6);
3. about 280 minutes to go from 31.6 to 27.3 (4.3 drop);
4. it took about 300 minutes to go from 27.3 to 25.15 (2.15 drop).
Sixthly, the method comprises the following steps: ambient temperature 27 ℃ is shown in table 6: (in view of the large amount of data, some intermediate values were deleted and temperature values per 1 ℃ drop were retained)
TABLE 6
| Serial number | While recordingBetween | Ambient temperature | Cadaver temperature |
| 6 | 2020/5/21 10：19 | 27.3 | 40.5 |
| 49 | 2020/5/21 11：02 | 27.2 | 39.5 |
| 85 | 2020/5/21 11：38 | 27.3 | 38.5 |
| 124 | 2020/5/21 12：17 | 25.9 | 37.5 |
| 160 | 2020/5/21 12：53 | 27.5 | 36.5 |
| 196 | 2020/5/21 13：29 | 26.3 | 35.5 |
| 234 | 2020/5/21 14：07 | 26.7 | 34.5 |
| 274 | 2020/5/21 14：47 | 27.3 | 33.5 |
| 326 | 2020/5/21 15：39 | 27.4 | 32.5 |
| 401 | 2020/5/21 16：54 | 27.4 | 31.5 |
| 509 | 2020/5/21 18：42 | 27.4 | 30.5 |
| 684 | 2020/5/21 21：37 | 27.7 | 29.5 |
| 1073 | 2020/5/22 4：06 | 28 | 28.5 |
Through experiments, we can find that:
1. (initial carcass temperature-ambient temperature)/2 = (40.2-27)/2 =6.75
2. It took 270 minutes to go from 40.2 to 33.75 (6.75 drop);
3. it took 280 minutes to go from 33.75 to 30.38 (3.37 drop);
4. it took 290 minutes to go from 30.38 to 28.7 (1.68 drop).
After the animal experiments were completed, we further performed statistical calculations on the post-mortem carcass temperature changes:
note: the above data are extracted from the forensic pathology textbook chapter four death time inference table 4-1
1. Ambient temperature of 24 deg.C
1. (initial temperature of carcass-ambient temperature)/2 = (37-24)/2 =6.5
2. About 12h from 37 down to 30.5 (down to 6.75);
2. ambient temperature of 21 deg.C
1. (initial temperature of carcass-ambient temperature)/2 = (37-21)/2 =8
2. About 12h from 37 to 29 (down 8);
3. ambient temperature of 18 deg.C
1. (initial temperature of carcass-ambient temperature)/2 = (37-18)/2 =9.5
2. About 12h from 37 to 27.5 (9.5 drop);
4. ambient temperature of 16 deg.C
1. (initial temperature of carcass-ambient temperature)/2 = (37-16)/2 =10.5
2. About 12h from 37 to 26.5 (10.5 drop);
5. ambient temperature of 13 deg.C
1. (initial temperature of carcass-ambient temperature)/2 = (37-13)/2 =12
2. About 12h is consumed for decreasing from 37 to 25 (decrease 12);
6. ambient temperature of 5 deg.C
1. (cadaver initial temperature-ambient temperature)/2 = (37-5)/2 =16
2. The drop from 37 to 21 (drop 6.75) took about 12h.
By calculation we found that: the "half-life" of a human at cadaver temperature after death is around 12h.
By utilizing the above rule, a new dead time calculation formula is obtained through statistical derivation by combining a large amount of actual case data, the invention also provides a cadaver temperature real-time measurement recording analyzer by combining the formula, fig. 2 is a hardware composition schematic diagram of the cadaver temperature real-time measurement recording analyzer in the embodiment, and as shown in fig. 2, the technical scheme of the invention is as follows:
the real-time corpse temperature measuring, recording and analyzing instrument comprises a host 1 and at least one temperature probe 5; the host 1 is integrated with a processing unit, a storage unit, a display screen 2 and an environment temperature and humidity sensor 4; the temperature probe 5 is in a round bar shape, and the temperature probe 5 is connected to a first signal acquisition end of the processing unit through a signal wire 6; the output end of the environmental temperature and humidity sensor 4 is connected to the second signal acquisition end of the processing unit; the display screen 2 is used for displaying the current ambient temperature T 1 Ambient humidity, carcass temperature T obtained by current temperature probe 5 2 And calculating the resulting time to death X;
the storage unit stores a first program, and the first program realizes the following steps after being loaded by the processing unit:
1) Data operation
X＝K*t；
t: inferring a time of death; k: a correction factor, defaulted to 1;
when T is 2 T = T plateau, = 37.2;
when in use
When the temperature of the water is higher than the set temperature,
when the temperature is higher than the set temperature
When the temperature of the water is higher than the set temperature,
T platform : carcass temperature plateau time;
T half-life : the difference between the temperature of the corpse and the ambient temperature is reduced by half; t is Half-life ＝12-T Platform ；
2) Result output
Outputting a display command to display the current ambient temperature T on the display screen 2 1 Environmental humidity, carcass temperature T obtained by current temperature probe 2 And calculating the resulting death time X.
Optionally, the storage unit stores a second program, and the second program is loaded by the processing unit to implement the following steps:
responding to an instruction which is input by a user and requires to adjust the correction coefficient, and enabling a modification picture of the correction coefficient to be displayed on the display screen;
receiving a correction coefficient input and confirmed by a user;
and substituting the correction coefficient input and confirmed by the user into the corresponding calculation formula X = K × t in the first program, and re-executing the first program.
It should be noted that the relationship between the change of the temperature of the cadaver and the death time has the following points:
(1) Influence of the external environment: the temperature change of the corpse is influenced by a plurality of factors including natural conditions and artificial conditions, but the temperature change of the corpse follows a certain rule after the death of the human body, generally, the temperature of the corpse is reduced rapidly within hours after the death of the human body and is gradually reduced later, and when the temperature of the corpse is close to the ambient temperature, the reduction rate of the temperature of the corpse is slower.
(2) Natural conditions are as follows: the lower the ambient temperature around the corpse, the higher the corpse temperature, the better the ventilation, the faster the corpse temperature decreases, the early corpse cold appears. Conversely, if the ambient temperature is high and ventilation is not good, the carcass descent speed is slow.
(3) Artificially conditions are as follows: the condition of the coat and the covering of the warm keeping object on the corpse has certain influence on the temperature reduction of the corpse. The more the clothes are, the better the heat-preservation performance is, the lower the cooling speed of the body; the reduction of the corpse temperature is related to the property of the corpse stopping object, the heat conducting performance is good, the heat conducting and radiating are fast, and the corpse temperature is also fast, so that the reduction of the corpse temperature on the metal corpse stopping object is fastest, the cement platform is faster, and the corpse on the wooden corpse stopping object is slowest.
Therefore, the correction coefficient is usually selected to be 1, but the corrected coefficient can be input again for calculation according to the influence of different external environments, natural conditions and artificial conditions.
Alternatively, there are two temperature probes 5.
The measurement site of the corpse temperature generally selects the internal corpse temperature with better correlation, and the main measurement sites are rectum and liver.
Rectal temperature measurement method: inserting a thermometer into the anus of a corpse for 15cm, wherein the thermometer is far away from the rear wall of the pelvis as far as possible during insertion to measure; the temperature judgment standard of the death time of the corpse is as follows: the first 10 hours after death, the rectal temperature of the cadaver decreased by an average of 1 ℃ per hour; after 10 hours, the temperature is averagely reduced by 0.5 to 1 ℃ per hour; the first 10 hours after death of obese carcasses, the average decrease in carcass temperature was 0.75 ℃ per hour and the average decrease in lean carcasses was 1 ℃ per hour. The temperature drop rate of the corpses in summer is 1.4 times slower than that in spring and autumn, and 0.7 time faster in winter.
The measuring method of the liver temperature comprises the following steps: during measurement, a small opening is cut from the lower edge of the right rib of the cadaver, and a thermometer is inserted to reach the surface of the liver. The liver is the largest parenchymal organ of the human body and is positioned at the central part of the corpse, so that the measurement of the liver temperature can better reflect the internal temperature of the corpse; the rectal temperature varies somewhat from living subject to living subject, and is greatly affected by the venous blood flow of the pelvic wall.
It should be noted that we usually collect the rectal temperature or the liver temperature of the corpse, and we can firstly use two temperature probes to continuously measure the rectal temperature or the liver temperature, respectively, and take the average value to calculate.
Exemplarily, the following steps are carried out: continuously measuring the liver temperature for 2 hours by using a temperature probe, taking the highest temperature value and the lowest temperature value of the liver, dividing the highest temperature value and the lowest temperature value by 2 hours to obtain an average temperature value, and calculating according to a corresponding formula to obtain corresponding death time; or the sum of the temperature values measured in each minute is divided by 120 minutes to obtain an average temperature value, and the average temperature value is calculated according to a corresponding formula to obtain corresponding death time.
Or a plurality of temperature probes can be adopted to simultaneously measure the rectal temperature and the liver temperature, the rectal temperature and the liver temperature are respectively calculated, and the average value of the rectal temperature and the liver temperature is taken, so that more accurate death time of the dead body is obtained.
Optionally, the temperature probe 5 is marked with a scale for the user to observe the depth of penetration of the probe into the cadaver. The temperature of the corpse can be accurately reflected, and the accurate death time can be obtained.
Optionally, the diameter of the head of the temperature probe 5 is gradually reduced, and the top end is rounded. It is easy to insert into the cadaver and a better temperature measurement is obtained.
Optionally, the host 1 is further provided with a data transmission interface for exporting data and/or receiving instructions. The data transmission interface can be connected with other equipment, and corresponding data can be conveniently output.
Optionally, when T is 2 When =37.2, the death time X is displayed on the display screen 2, and the specific display information is "death time is 0-t hours".
Optionally, the display screen 2 is a touch display screen.
The invention also provides a method for analyzing death time according to the corpse temperature, which adopts a program stored in a storage unit of the corpse temperature real-time measuring and recording analyzer, and the program is realized after being operated by the processing unit.
In conclusion, scales are marked on the temperature probe, so that the depth of the probe penetrating into the corpse can be visually observed; and this analysis appearance can insert a plurality of temperature probe simultaneously, realizes gathering a plurality of position temperatures and a plurality of temperature probe simultaneous measurements of same position simultaneously, so, can observe directly perceivedly that temperature probe stretches into the degree of depth and the temperature of corpse, this analysis appearance is connected with temperature sensor and environment temperature and humidity detection sensor, can show corresponding temperature and the environment humiture of gathering on the display screen simultaneously, according to the program of memory cell storage, processing unit handles, finally reachs dead time.
Practical case 1:
in 2020, 6 and 14 days, a certain cell of a dam bridge area in Western Ann city has a fate, the field is positioned in a bedroom of a unit building, a corpse is positioned on a bed, the upper part of the body is provided with short sleeves, the lower part of the body is provided with trousers, the posture is fat, and the quilt is not covered. The temperature of the corpse measured after 11 am arrives at the site is 33.5 ℃, the minimum temperature of the day is 21 ℃, the maximum temperature is 27 ℃, and the environmental temperature is 24 ℃ in view of small indoor temperature difference change, and the formula is utilized:
the t =7.869 hours is calculated, and through case investigation, the case time of a suspect is about 3 minutes and 30 minutes in the morning, and the death time of a deceased is about 8 hours.
Practical case 2:
20 days 5 and 20 months in 2020, a dead body is found in the New Fengdong city in the non-central area of the city of Xian, the dead body is located under the three-bridge overpass on site, the dead body is an outdoor site, short sleeves are arranged on the dead body, trousers are arranged on the dead body, the body shape is thin, and no cover is arranged. The temperature of the corpse measured after the corpse is 11 a.5 ℃ in the morning and the temperature of the corpse measured after the corpse is 50 a.m., the minimum temperature of the day is 18 ℃ and the maximum temperature is 24 ℃, and the average value of the environmental temperature is 22 ℃ in view of the large change of the outdoor environmental temperature difference, and the formula is utilized:
the death time t =12 hours was calculated. According to case investigation, the suicide time of a dead is about 19 days and 12 night, and the death time of the dead is about 11 hours and 50 minutes.
The experiment is carried out by the case of which the death time is confirmed, and the result obtained by adopting the cadaver temperature real-time measuring and recording analyzer and the calculating method thereof is more accurate.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. The real-time corpse temperature measuring, recording and analyzing instrument is characterized by comprising a host and at least one temperature probe; the host is integrated with a processing unit, a storage unit, a display screen and an environment temperature and humidity sensor; the temperature probe is in a round bar shape and is connected to a first signal acquisition end of the processing unit through a signal wire; the output end of the environment temperature and humidity sensor is connected to the second signal acquisition end of the processing unit; the display screen is used for displaying the current ambient temperature T 1 Environmental humidity, carcass temperature T obtained by current temperature probe 2 And calculating the resulting death time X;
the storage unit stores a first program, and the first program realizes the following steps after being loaded by the processing unit:
1) Data operation
X＝K*t；
t: inferring a time of death; k: a correction factor of 1 by default;
when T is 2 T = T when =37.2 Platform ；
When the temperature is higher than the set temperature
When the utility model is used, the water is discharged,
when in use
When the temperature of the water is higher than the set temperature,
T platform : cadaver temperature plateau time;
T half-life : the temperature difference between the corpse and the environment is reduced by half; t is Half-life ＝12-T Platform ；
2) Result output
Outputting a display command to display the current ambient temperature T on the display screen 1 Environmental humidity, carcass temperature T obtained by current temperature probe 2 And calculating the resulting death time X.
2. The real-time cadaver temperature measuring, recording and analyzing instrument as claimed in claim 1, wherein the storage unit stores a second program, and the second program is loaded by the processing unit to implement the following steps:
responding to an instruction which is input by a user and requires to adjust the correction coefficient, and enabling a modification picture of the correction coefficient to be displayed on the display screen;
receiving a correction coefficient input and confirmed by a user;
and substituting the correction coefficient input and confirmed by the user into the corresponding calculation formula X = K × t in the first program, and re-executing the first program.
3. The real-time cadaver temperature measuring, recording and analyzing instrument of claim 1, wherein there are two temperature probes.
4. The real-time cadaver temperature measuring, recording and analyzing instrument as claimed in claim 1, wherein the temperature probe is marked with a scale for a user to observe the depth of penetration of the probe into the cadaver.
5. The real-time cadaver temperature measuring and recording analyzer as set forth in claim 1, wherein the head of the temperature probe has a gradually decreasing diameter and a rounded tip.
6. The real-time cadaver temperature measurement and recording analyzer as claimed in claim 1, wherein the host computer is further provided with a data transmission interface for exporting data and/or receiving instructions.
7. The real-time cadaver temperature measuring, recording and analyzing instrument of claim 1, wherein T is T 2 And when =37.2, the death time X is displayed on the display screen, and the specific display information is that the death time is 0-t hours.
8. The cadaver temperature real-time measurement recording analyzer as claimed in claim 1, wherein the display screen is a touch display screen.
9. A method for analyzing death time based on cadaver temperature, comprising: a program stored by a storage unit according to claim 1 or 2, the program implementing the steps performed by the processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811139.XA CN112113683B (en) | 2020-08-13 | 2020-08-13 | Real-time corpse temperature measuring, recording and analyzing instrument and death time analyzing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811139.XA CN112113683B (en) | 2020-08-13 | 2020-08-13 | Real-time corpse temperature measuring, recording and analyzing instrument and death time analyzing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112113683A CN112113683A (en) | 2020-12-22 |
| CN112113683B true CN112113683B (en) | 2022-11-11 |
Family
ID=73804937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010811139.XA Active CN112113683B (en) | 2020-08-13 | 2020-08-13 | Real-time corpse temperature measuring, recording and analyzing instrument and death time analyzing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112113683B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112914519A (en) * | 2021-04-09 | 2021-06-08 | 定边县公安局 | Portable liver temperature measuring equipment and using method thereof |
| CN113341043B (en) * | 2021-06-18 | 2022-11-25 | 中国医科大学 | Method for deducing early death and post-death inundation time of corpse in water based on metabonomics marker and application thereof |
| CN115005156B (en) * | 2022-04-26 | 2023-06-16 | 深圳市中融数字科技有限公司 | Animal death discrimination method and device, storage medium and electronic equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE249168T1 (en) * | 2000-12-29 | 2003-09-15 | Else-Gita Dr Mall | METHOD FOR DETERMINING THE TIME OF DEATH |
| JP5351681B2 (en) * | 2009-09-17 | 2013-11-27 | テルモ株式会社 | Body temperature detection system |
| WO2012017300A1 (en) * | 2010-08-04 | 2012-02-09 | University Of Cape Town | Apparatus for estimating post-mortem interval of a corpse |
| EP2673721A1 (en) * | 2011-02-13 | 2013-12-18 | Masimo Corporation | Medical characterization system |
| US20150127293A1 (en) * | 2013-09-09 | 2015-05-07 | Eugene Terry Tatum | Time of death probe and recorder |
| EP2930515A1 (en) * | 2014-04-08 | 2015-10-14 | Universite D'angers | Prognostic tests for hepatic disorders |
| CN205537767U (en) * | 2016-04-13 | 2016-08-31 | 贵州大学 | Data wireless transmission formula death time analysis appearance |
| EP3646884A1 (en) * | 2018-10-30 | 2020-05-06 | Assistance Publique, Hopitaux De Paris | Method for estimating survival of colchicine-intoxicated patients |
-
2020
- 2020-08-13 CN CN202010811139.XA patent/CN112113683B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112113683A (en) | 2020-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112113683B (en) | Real-time corpse temperature measuring, recording and analyzing instrument and death time analyzing method | |
| Flanagan | Wound measurement: can it help us to monitor progression to healing? | |
| US8016763B2 (en) | Method for analysing pressure signals derivable from a body cavity | |
| US6587715B2 (en) | Assessment of organs for transplant, xenotransplant, and predicting time of death | |
| Stacey et al. | Measurement of the healing of venous ulcers | |
| CN107595248A (en) | A kind of method and system for detecting and evaluating upgrowth and development of children situation | |
| JP5890841B2 (en) | How to display the temperature field of a living body | |
| Andersen et al. | Sources of measurement variation in blood pressure in large-scale epidemiological surveys with follow-up | |
| Hohl et al. | Growth at reduced turgor: irreversible and reversible cell-wall extension of maize coleoptiles and its implications for the theory of cell growth | |
| CN107320135A (en) | Natural family planning instruction device and method | |
| CN106570325A (en) | Partial-least-squares-based abnormal detection method of mammary gland cell | |
| Wyndham et al. | Physiological reactions of Caucasian and Bantu males in acute exposure to cold | |
| DiMaria-Ghalili | Medical record versus researcher measures of height and weight | |
| CN117038090A (en) | HIFU energy prediction model construction and parameter determination method | |
| CN113096801B (en) | Human body falling risk assessment system and method based on gravity line monitoring | |
| Jensen et al. | Non-invasive body temperature measurement of wild chimpanzees using fecal temperature decline | |
| Rutty | The estimation of the time since death using temperatures recorded from the external auditory canal: Part I: Can a temperature be recorded and interpreted from this site? | |
| CN209707438U (en) | In vitro dual dynamic degradation performance monitoring device for medical magnesium alloy implants | |
| Jaszczak et al. | Estimation of blood flow in transcutaneous PO2 measurements | |
| CN117577331B (en) | System and method for constructing personalized fetal growth standard curve | |
| Verheyen et al. | Residential proximity to major roads and neighbourhood green space in relation to biological stress in the second trimester of pregnancy in the IPANEMA cohort | |
| CN1141558C (en) | Multi-point temp. detector for obtaining bioogical biopsy tissue local metabolic rate | |
| McGarr et al. | Reliability of laser-Doppler flowmetry derived measurements of forearm and calf cutaneous vasodilation during gradual local heating in young adults | |
| CN103937870B (en) | A kind of method of continuous detecting insulin sensitivity | |
| CN104287693A (en) | Metabolic rate measurement method based on blood glucose non-invasive measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |