Stray current data recorder

Abstract

The stray current data recorder provided by the embodiment of the utility model comprises a control module, a resistance conversion module and a voltage measurement module, the resistance conversion module and the voltage measurement module are respectively connected with the control module; the resistance conversion module and the voltage measurement module are respectively connected in parallel with a to-be-measured resistor; the voltage measurement module is used for collecting voltage data at two ends of the to-be-measured resistor; the control module is used for outputting a first electric signal to the resistance conversion module; the resistance conversion module is used for adjusting the resistance of a branch where the resistance conversion module is located to a first reference resistance after receiving the first electric signal; the control module is also used for outputting a second electric signal to the resistance conversion module; after the resistance conversion module receives the second electric signal, the resistance of the branch where the resistance conversion module is located is adjusted to a second reference resistance; and the control module is also used for determining the real voltage at the two ends of the resistor to be measured according to the first reference resistor, the second reference resistor and the voltage data, so that the measurement precision can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of interference protection, and in particular to a stray current data recorder. BACKGROUND

[0002] The stray current data recorder is widely used in railway and subway systems, pipeline systems, industrial facilities, buildings and infrastructures, power systems, and the like. The main functions of the stray current data recorder include preventing electrochemical corrosion, improving safety, optimizing maintenance and management, ensuring compliance, and performing data analysis and fault diagnosis.

[0003] In practical applications, the measurement probe of the data recorder can be connected in parallel across the to-be-measured resistor to measure the potential difference (voltage). Then, the current passing through the to-be-measured resistor can be calculated based on the known resistance value of the to-be-measured resistor. However, the voltage measured across the to-be-measured resistor by using the above method is not accurate. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a stray current data recorder to solve the problem of low accuracy of the measured voltage across the to-be-measured resistor.

[0005] In a first aspect, an embodiment of the present application provides a stray current data recorder, comprising: a control module, a resistance conversion module, and a voltage measurement module.

[0006] The resistance conversion module and the voltage measurement module are connected to the control module, respectively.

[0007] The resistance conversion module and the voltage measurement module are connected in parallel to the to-be-measured resistor, respectively.

[0008] The voltage measurement module is configured to acquire voltage data across the to-be-measured resistor and send the voltage data to the control module.

[0009] The control module is configured to output a first electrical signal to the resistance conversion module.

[0010] The resistance conversion module is configured to adjust the resistance of the branch in which the resistance conversion module is located to a first reference resistance after receiving the first electrical signal.

[0011] The control module is further configured to output a second electrical signal to the resistance conversion module.

[0012] The resistance conversion module is further configured to adjust the resistance of the branch in which the resistance conversion module is located to a second reference resistance after receiving the second electrical signal.

[0013] The control module is further configured to determine a real voltage across the to-be-measured resistance according to the first reference resistance, the second reference resistance and the voltage data.

[0014] Optionally, the resistance conversion module comprises a switching switch, a first reference resistance and a second reference resistance.

[0015] The first end of the switching switch is connected with the first end of the to-be-measured resistance, the second end of the switching switch is connected with the first end of the first reference resistance, the third end of the switching switch is connected with the first end of the second reference resistance, and the fourth end of the switching switch is connected with the control module.

[0016] The second end of the to-be-measured resistance is connected with the second end of the first reference resistance and the second end of the second reference resistance respectively.

[0017] The switching switch is configured to turn on the first end and the second end of the switching switch after receiving the first electric signal, and turn off the first end and the second end of the switching switch after turning on for a first preset time length, and turn on the first end and the third end of the switching switch after receiving the second electric signal, and turn off the first end and the third end of the switching switch after turning on for a first preset time length.

[0018] Optionally, the resistance conversion module comprises a first switch, a second switch, a first reference resistance and a second reference resistance.

[0019] The first end of the to-be-measured resistance is connected with the first end of the first switch and the first end of the second switch respectively.

[0020] The second end of the first switch is connected with the first end of the first reference resistance.

[0021] The second end of the second switch is connected with the first end of the second reference resistance.

[0022] The first switch and the second switch are connected with the control module.

[0023] The second end of the to-be-measured resistance is connected with the second end of the first reference resistance and the second end of the second reference resistance respectively.

[0024] The first switch is configured to close after receiving the first electric signal, and open after closing for a second preset time length.

[0025] The second switch is configured to close after receiving the second electric signal, and open after closing for a second preset time length.

[0026] Optionally, the difference between the first reference resistance and the second reference resistance is between 10MΩ and 100MΩ, the first reference resistance is greater than the second reference resistance, and the first reference resistance is between 1MΩ and 20MΩ.

[0027] Optionally, the resistance conversion module comprises a light controller, a light source and a photoresistor.

[0028] The photoresistor is connected in parallel with the resistance to be measured.

[0029] The light controller is connected with the control module and the light source respectively.

[0030] The light controller is configured to adjust the brightness of the light source to a first preset brightness after receiving the first electrical signal; when the brightness of the light source is the first preset brightness, the resistance of the photoresistor is a first reference resistance.

[0031] The light controller is further configured to adjust the brightness of the light source to a second preset brightness after receiving the second electrical signal; when the brightness of the light source is the second preset brightness, the resistance of the photoresistor is a second reference resistance.

[0032] Optionally, the resistance conversion module comprises a temperature controller and a thermistor.

[0033] The thermistor is connected in parallel with the resistance to be measured.

[0034] The temperature controller is connected with the control module.

[0035] The temperature controller is configured to adjust the temperature around the thermistor to a first preset temperature after receiving the first electrical signal; when the temperature around the thermistor is the first preset temperature, the resistance of the thermistor is a first reference resistance.

[0036] The temperature controller is configured to adjust the temperature around the thermistor to a second preset temperature after receiving the second electrical signal; when the temperature around the thermistor is the second preset temperature, the resistance of the thermistor is a second reference resistance.

[0037] Optionally, it further comprises a vibration sensor.

[0038] The vibration sensor is connected with the control module.

[0039] The vibration sensor is configured to collect a parameter value corresponding to a vibration parameter around the vibration sensor and transmit the parameter value to the control module.

[0040] The control module is configured to start timing from when the parameter value is greater than a preset parameter value and label voltage data received within a third preset time length.

[0041] Optionally, it further comprises an up key.

[0042] The up key is connected with the control module.

[0043] When the up key is pressed, a first high-level signal is output to the control module, and the control module controls the screen of the recorder to be unlocked and lighted up and display the first preset number of recently collected data on the screen of the recorder when the first high-level signal is received for the first time.

[0044] The control module is further configured to control the screen of the recorder to display the first preset number of recently collected data that is not displayed among the data when the first high-level signal is received for the second time within a fourth preset time duration after the first high-level signal is received for the first time.

[0045] Optionally, the device further comprises a down key.

[0046] The down key is connected to the control module.

[0047] When the down key is pressed, a second high-level signal is output to the control module, and the control module controls the screen of the recorder to display the first preset number of data after the first preset number of currently displayed data when the second high-level signal is received and the screen of the recorder is in the lighted-up state.

[0048] Optionally, the device further comprises a label key.

[0049] The label key is connected to the control module.

[0050] When the label key is pressed, a third high-level signal is output to the control module, and the control module is configured to label the voltage data received within a fifth preset time duration from the time when the third high-level signal is received.

[0051] The stray current data recorder provided by the embodiment of the application comprises a control module, a resistance conversion module and a voltage measurement module; the resistance conversion module and the voltage measurement module are connected with the control module respectively; the resistance conversion module and the voltage measurement module are respectively used for being connected in parallel with a resistance to be measured; the voltage measurement module is used for collecting voltage data of both ends of the resistance to be measured and sending the voltage data to the control module; the control module is used for outputting a first electric signal to the resistance conversion module; the resistance conversion module is used for adjusting the resistance of a branch where the resistance conversion module is located to a first reference resistance after receiving the first electric signal; the control module is further used for outputting a second electric signal to the resistance conversion module; the resistance conversion module is further used for adjusting the resistance of the branch where the resistance conversion module is located to a second reference resistance after receiving the second electric signal; and the control module is further used for determining a real voltage of both ends of the resistance to be measured according to the first reference resistance, the second reference resistance and the voltage data. Different electric signals can be outputted to the resistance conversion module by the control module, the resistance of the branch where the resistance conversion module is located can be adjusted to different reference resistances, multi-point calibration can be performed, the measurement error of the voltage of both ends of the resistance to be measured can be effectively reduced, and the measurement precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0052] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0053] Figure 1 An application scenario provided by the embodiment of the application is shown in the following figure;

[0054] Figure 2 A circuit schematic diagram of the stray current data recorder provided by the embodiment of the application is shown in the following figure;

[0055] Figure 3 Another circuit schematic diagram of the stray current data recorder provided by the embodiment of the application is shown in the following figure;

[0056] Figure 4 Still another circuit schematic diagram of the stray current data recorder provided by the embodiment of the application is shown in the following figure;

[0057] Figure 5 Still another circuit schematic diagram of the stray current data recorder provided by the embodiment of the application is shown in the following figure;

[0058] Figure 6 Still another circuit schematic diagram of the stray current data recorder provided by the embodiment of the application is shown in the following figure.

[0059] The present application has been shown and described with reference to the preferred embodiments. Equivalent mechanisms in which changes can be made to the application as described in the specification without departing from the spiritual teachings of the application will occur to those skilled in the art, and are intended to be within the scope of the application as defined in the appended claims. DETAILED DESCRIPTION

[0060] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description herein is intended for illustrating the conceptual aspects of the present application by way of reference to the particular embodiments, and is not intended to limit the scope of the present application in any way.

[0061] Stray current data recorders are widely used in various scenarios such as railway and subway systems, pipeline systems, industrial facilities, buildings and infrastructure, power systems, etc. Their main functions include preventing electrochemical corrosion, improving safety, optimizing maintenance and management, ensuring compliance, and conducting data analysis and fault diagnosis.

[0062] For example, in electrified railway and subway systems, tracks and other metal structures can be affected by stray currents. Monitoring and recording stray currents in tracks and surrounding metal structures can prevent electrochemical corrosion and ensure the safety and lifespan of tracks and infrastructure. Stray currents refer to currents flowing outside the specified circuit or intended circuit.

[0063] In practical applications, the measurement probe of the data recorder can be connected in parallel across the resistance to be measured to measure the potential difference (voltage), and the current through the resistance to be measured can be calculated by the known resistance value of the resistance to be measured. The accuracy of the voltage measured across the resistance to be measured by the above method is not high.

[0064] In view of this, this application provides a stray current data logger, which may include a control module, a resistance conversion module, and a voltage measurement module; the resistance conversion module and the voltage measurement module are respectively connected to the control module; the resistance conversion module and the voltage measurement module are respectively used to be connected in parallel with the resistor to be measured; the voltage measurement module is used to collect voltage data across the resistor to be measured; the control module is used to output a first electrical signal to the resistance conversion module; the resistance conversion module is used to adjust the resistance of the branch where the resistance conversion module is located to a first reference resistance after receiving the first electrical signal; the control module is also used to output a second electrical signal to the resistance conversion module; the resistance conversion module is also used to adjust the resistance of the branch where the resistance conversion module is located to a second reference resistance after receiving the second electrical signal; the control module is also used to determine the true voltage across the resistor to be measured based on the first reference resistance, the second reference resistance, and the voltage data. By outputting different electrical signals to the resistance conversion module through the control module, the resistance of the branch where the resistance conversion module is located can be adjusted to different reference resistances, enabling multi-point calibration. This method can effectively reduce the measurement error of the voltage across the resistor to be measured and improve the measurement accuracy.

[0065] Figure 1 An application scenario diagram provided for an embodiment of this application, such as... Figure 1 As shown, the closed circuit containing the resistor to be measured is within the dashed box. The stray current data logger includes probe 1 and probe 2. Besides probe 1 and probe 2, the stray current data logger also includes a control module, a resistance conversion module, and a voltage measurement module. The resistance conversion module and voltage measurement module are connected to the control module. When measuring the voltage across the resistor to be measured, probe 1 is connected to the first end of the resistor, and probe 2 is connected to the second end. After connection, the resistance conversion module and voltage measurement module are connected in parallel with the resistor to be measured. The voltage measurement module is used to collect voltage data across the resistor. First, the control module outputs a first electrical signal to the resistance conversion module. After receiving the first electrical signal, the resistance conversion module adjusts the resistance of its branch to the first reference resistance. Then, the control module outputs a second electrical signal to the resistance conversion module. After receiving the second electrical signal, the resistance conversion module adjusts the resistance of its branch to the second reference resistance. Finally, the control module determines the true voltage across the resistor to be measured based on the first reference resistance, the second reference resistance, and the voltage data.

[0066] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0067] Figure 2 A circuit schematic of a stray current data recorder is provided for an embodiment of the present application. As shown in FIG. 2, the stray current data recorder provided by the embodiment of the present application can include a control module, a resistance conversion module, and a voltage measurement module.

[0068] The resistance conversion module and the voltage measurement module are respectively connected with the control module.

[0069] The resistance conversion module and the voltage measurement module are respectively used to be connected in parallel with a resistance to be measured.

[0070] The voltage measurement module is configured to collect voltage data across the resistance to be measured and send the voltage data to the control module.

[0071] The control module is configured to output a first electric signal to the resistance conversion module.

[0072] The resistance conversion module is configured to adjust a resistance of a branch where the resistance conversion module is located to a first reference resistance after receiving the first electric signal.

[0073] The control module is further configured to output a second electric signal to the resistance conversion module.

[0074] The resistance conversion module is further configured to adjust the resistance of the branch where the resistance conversion module is located to a second reference resistance after receiving the second electric signal.

[0075] The control module is further configured to determine a real voltage across the resistance to be measured according to the first reference resistance, the second reference resistance, and the voltage data.

[0076] The control module can be any device having a data processing function.

[0077] The voltage measurement module can be a voltage sensor.

[0078] When the voltage measurement module is a voltage sensor, the voltage sensor can collect voltage data across the resistance every first preset time and send the collected voltage data to the control module.

[0079] The control module outputs a first electric signal to the resistance conversion module every second preset time, wherein the first electric signal is a certain high-level signal, and the resistance conversion module adjusts the resistance of the branch where the resistance conversion module is located to a first reference resistance after receiving the first electric signal; after the resistance conversion module outputs the first electric signal, a second electric signal is output to the resistance conversion module after a third preset time, and the second electric signal can be another high-level signal; the resistance conversion module adjusts the resistance of the branch where the resistance conversion module is located to a second reference resistance after receiving the second electric signal; when the control module determines the real voltage across the resistance to be measured according to the first reference resistance, the second reference resistance and the voltage data, a plurality of methods can be used, which are not limited in the present application.

[0080] In an optional implementation, first, the first voltage data across the resistance to be measured when the resistance of the branch where the resistance conversion module is located is the first reference resistance and the second voltage data across the resistance to be measured when the resistance of the branch where the resistance conversion module is located is the second reference resistance are screened from the voltage data sent by the voltage measurement module, and finally, the real voltage across the resistance to be measured is determined according to the first reference resistance, the second reference resistance, the first voltage data and the second voltage data. Optionally, the real voltage across the resistance to be measured can be determined by the following formula.

[0081]

[0082] wherein, V h represents the first reference resistance, V l represents the second reference resistance, k represents the ratio of the second reference resistance to the first reference resistance, and E represents the real voltage across the resistance to be measured.

[0083] The derivation process of the above formula is as follows:

[0084] When the resistance of the branch where the resistance conversion module is located is adjusted to the first reference resistance, formula ① is satisfied

[0085]

[0086] wherein, R is the real resistance value of the resistance to be measured, R h is the first reference resistance.

[0087] According to formula ①, formula ② can be obtained

[0088]

[0089] When the resistance of the branch where the resistance conversion module is located is adjusted to the second reference resistance, formula ③ is satisfied

[0090]

[0091] wherein, Rl The second reference resistance.

[0092] Substitute formula 2 into formula 3, and the following formula 4 can be obtained.

[0093] In this way, the control module can output different electric signals to the resistance conversion module, the resistance of the branch where the resistance conversion module is located can be adjusted to different reference resistances, multi-point calibration can be performed, the measurement error of the voltage across the to-be-measured resistance can be effectively reduced, and the measurement precision is improved.

[0094] Optionally, the resistance conversion module comprises a switching switch, a first reference resistance and a second reference resistance.

[0095] The first end of the switching switch is connected with the first end of the to-be-measured resistance, the second end of the switching switch is connected with the first end of the first reference resistance, the third end of the switching switch is connected with the first end of the second reference resistance, and the fourth end of the switching switch is connected with the control module.

[0096] The second end of the to-be-measured resistance is connected with the second end of the first reference resistance and the second end of the second reference resistance respectively.

[0097] The switching switch is configured to, after receiving the first electric signal, turn on the first end and the second end of the switching switch, and turn off the first end and the second end of the switching switch after a first preset time length.

[0098] Figure 3 Another circuit schematic diagram of the stray current data recorder provided by the embodiment of the application is shown in FIG. 3. Figure 3 As shown in FIG. 3, after receiving the first electric signal, the switching switch controls the first end and the second end of the switching switch to be turned on, at this time, the resistance of the branch where the resistance conversion module is located is the first reference resistance, after a first preset time length, the control module outputs a third electric signal to the switching switch, after receiving the third electric signal, the switching switch controls the first end and the second end of the switching switch to be turned off.

[0099] After receiving the second electric signal, the switching switch controls the first end and the third end of the switching switch to be turned on, at this time, the resistance of the branch where the resistance conversion module is located is the second reference resistance, after a first preset time length, the control module outputs a fourth electric signal to the switching switch, after receiving the fourth electric signal, the switching switch controls the first end and the third end of the switching switch to be turned off.

[0100] The third electric signal and the fourth electric signal can be the same high-level signal, but the high-level signal corresponding to the first electric signal and the second electric signal is different. The third electric signal and the fourth electric signal can also be different high-level signals.

[0101] In this way, the switch can quickly switch between different reference resistances, so that the system can dynamically adjust the measurement parameters, further improving the accuracy of the measurement. Moreover, the switch is automatically controlled by the control module, reducing the possibility of human intervention and reducing the instability factors caused by human operation.

[0102] Optionally, the resistance conversion module comprises a first switch, a second switch, a first reference resistance and a second reference resistance.

[0103] The first end of the to-be-measured resistance is connected to the first end of the first switch and the first end of the second switch, respectively.

[0104] The second end of the first switch is connected to the first end of the first reference resistance.

[0105] The second end of the second switch is connected to the first end of the second reference resistance.

[0106] The second end of the to-be-measured resistance is connected to the second end of the first reference resistance and the second end of the second reference resistance, respectively.

[0107] The first switch and the second switch are connected to the control module.

[0108] The first switch is configured to close after receiving the first electrical signal and open after closing for a second preset time.

[0109] The second switch is configured to close after receiving the second electrical signal and open after closing for a second preset time.

[0110] Specifically, Figure 4 Another circuit schematic diagram of the stray current data recorder is provided for the embodiments of the present application, as shown in Figure 4 The control module sends a first electrical signal to the first switch, and the first switch closes after receiving the first electrical signal. At this time, the resistance of the branch where the resistance conversion module is located is the first reference resistance. After closing for a second preset time, the control module sends a third electrical signal to the first switch, and the first switch opens after receiving the third electrical signal. The control module sends a second electrical signal to the second switch, and the second switch closes after receiving the second electrical signal. At this time, the resistance of the branch where the resistance conversion module is located is the second reference resistance. After closing for a second preset time, the control module sends a fourth electrical signal to the second switch, and the second switch opens after receiving the fourth electrical signal.

[0111] In this way, the first switch and the second switch automatically switch the reference resistance according to the electrical signal of the control module, realizing automatic measurement and reducing the complexity of manual operation, and improving the efficiency of switching.

[0112] Optionally, the difference between the first reference resistance and the second reference resistance is between 10MΩ and 100MΩ, the first reference resistance is greater than the second reference resistance, and the first reference resistance is between 1MΩ and 20MΩ.

[0113] In this way, the first reference resistance is between 1MΩ and 20MΩ, and the difference between the first reference resistance and the second reference resistance is between 10MΩ and 100MΩ, which can further improve the accuracy of the real voltage across the measured resistance determined.

[0114] Optionally, the resistance conversion module comprises an optical controller, a light source, and a photoresistor.

[0115] The photoresistor is connected in parallel with the resistance to be measured.

[0116] The optical controller is connected to the control module and the light source, respectively.

[0117] The optical controller is configured to adjust the brightness of the light source to a first preset brightness after receiving the first electrical signal, and the resistance value of the photoresistor is the first reference resistance when the brightness of the light source is the first preset brightness.

[0118] The optical controller is further configured to adjust the brightness of the light source to a second preset brightness after receiving the second electrical signal, and the resistance value of the photoresistor is the second reference resistance when the brightness of the light source is the second preset brightness.

[0119] Specifically, Figure 5 Another circuit schematic diagram of a stray current data recorder is provided for the embodiments of the present application, as shown in Figure 5 The optical controller can adjust the current through the light source to a first current to adjust the brightness of the light source to a first preset brightness after receiving the first electrical signal sent by the control module, and the resistance value of the photoresistor is the first reference resistance when the brightness of the light source is the first preset brightness, at which time the resistance of the branch where the resistance conversion module is located is the first reference resistance. The optical controller can adjust the current through the light source to a second current to adjust the brightness of the light source to a second preset brightness after receiving the second electrical signal sent by the control module, and the resistance value of the photoresistor is the second reference resistance when the brightness of the light source is the second preset brightness, at which time the resistance of the branch where the resistance conversion module is located is the second reference resistance.

[0120] In this way, the design of the optical controller and the photoresistor avoids the wear and aging problems of mechanical switches, and enhances the stability and reliability of the system.

[0121] Optionally, the resistance conversion module comprises a temperature controller and a thermistor.

[0122] The thermistor is connected in parallel with the resistance to be measured.

[0123] The temperature controller is connected with the control module.

[0124] The temperature controller is configured to adjust the temperature around the thermistor to a first preset temperature after receiving the first electric signal, and the resistance of the thermistor is a first reference resistance when the temperature around the thermistor is the first preset temperature.

[0125] The temperature controller is configured to adjust the temperature around the thermistor to a second preset temperature after receiving the second electric signal, and the resistance of the thermistor is a second reference resistance when the temperature around the thermistor is the second preset temperature.

[0126] Specifically, Figure 6 Another circuit schematic diagram of the stray current data recorder is provided for the embodiments of the present application, as shown in Figure 6 The temperature controller adjusts the temperature around the thermistor to a first preset temperature after receiving the first electric signal sent by the control module, and the specific adjustment process is as follows: the temperature around the thermistor collected by the temperature sensor is obtained, and the current environmental temperature is compared with the first preset temperature, and the required adjustment amount is calculated using a control algorithm, a control signal is generated according to the calculation result, and is sent to the actuator. The actuator performs corresponding operations according to the control signal, such as starting the heater to heat, starting the cooler to cool, adjusting the fan speed, etc., and continues to obtain the temperature around the thermistor collected by the temperature sensor, and adjusts in real time to ensure that the temperature around the thermistor is the first preset temperature. When the temperature around the thermistor is the first preset temperature, the resistance of the thermistor is a first reference resistance, and the resistance of the branch where the resistance conversion module is located is the first reference resistance. The temperature controller adjusts the temperature around the thermistor to a second preset temperature after receiving the second electric signal sent by the control module. The method for adjusting the temperature around the thermistor to the second preset temperature is the same as the method for adjusting the temperature around the thermistor to the first preset temperature, and will not be repeated here. When the temperature around the thermistor is the second preset temperature, the resistance of the thermistor is a second reference resistance, and the resistance of the branch where the resistance conversion module is located is the second reference resistance.

[0127] In this way, the combination design of the temperature controller and the thermistor can effectively reduce electromagnetic interference and improve the anti-interference ability of the system. Moreover, the design of the temperature controller and the thermistor reduces the use of mechanical components, and reduces the maintenance difficulty and cost.

[0128] Optionally, it further comprises a vibration sensor.

[0129] The vibration sensor is connected with the control module.

[0130] The vibration sensor is configured to collect parameter values corresponding to vibration parameters in the surrounding environment and transmit the parameter values to the control module.

[0131] The control module is configured to start timing when the parameter values are greater than preset parameter values and label voltage data received within a third preset time period.

[0132] The vibration sensor can obtain a plurality of vibration parameters, which are used to describe and quantify vibration characteristics. The vibration parameters can include acceleration, speed, displacement, frequency, amplitude, frequency spectrum, phase, and the like.

[0133] Specifically, the vibration sensor can collect parameter values corresponding to vibration parameters in the surrounding environment and transmit the collected parameter values to the control module. The control module starts timing when the parameter values are greater than preset parameter values and labels voltage data received within a third preset time period after the timing starts, so as to record the influence of the metro / high-speed rail on the collected voltage data.

[0134] In this way, the step of manually labeling by the staff can be omitted. The vibration sensor can perceive the vibration caused by the passing metro / high-speed rail in the surrounding environment and automatically label, thereby improving the labeling efficiency and reducing the use of human resources.

[0135] Optionally, the device further comprises an up key.

[0136] The up key is connected to the control module.

[0137] When the up key is pressed, a first high-level signal is output to the control module. The control module controls the screen of the recorder to be unlocked and lit when the first high-level signal is received for the first time, and displays the first preset number of recently collected data on the screen of the recorder.

[0138] The control module is further configured to control the screen of the recorder to display the first preset number of recently collected data among the data that has not been displayed when the first high-level signal is received for the second time within a fourth preset time period after the first high-level signal is received for the first time.

[0139] The up key is located in a blank position of the panel of the recorder.

[0140] Each piece of data can include: a direct current voltage (Potential DC Reading), an alternating current voltage (Potential AC Reading), a direct current (Current DC Reading) and an alternating current (Current AC Reading), a direct current instant off potential (Potential DC Instant Off Reading), milliseconds, a real-time date / time, units of the direct current voltage (Potential DC Units), units of the alternating current voltage (Potential AC Units), units of the direct current (Current DC Units), and units of the alternating current (Current AC Units).

[0141] The first preset number of pieces of data can be 20.

[0142] Specifically, the voltage measurement module or other measurement modules sends the collected data to the control module, and the control module stores the collected data. Assuming that the data has n pieces, the data is arranged in the existing order of time to obtain a data sequence. The closer the data at the front of the sequence is to the current time, the greater the difference between the data at the back of the sequence and the current time.

[0143] When the up key is pressed, a first high-level signal is output to the control module. When the control module receives the first high-level signal for the first time, the screen of the recorder is unlocked and turned on, and the first n pieces of data in the above data sequence are displayed on the screen of the recorder. When the control module receives the first high-level signal for the second time within a fourth preset time period after receiving the first high-level signal for the first time, the screen of the recorder displays the n+1th to 2nth pieces of data. When the control module does not receive the first high-level signal within the fourth preset time period after receiving the first high-level signal for the first time, the screen of the recorder is locked. When the control module receives the first high-level signal for the third time within a fourth preset time period after receiving the first high-level signal for the second time, the screen of the recorder displays the 2n+1th to 3nth pieces of data. The above process is repeated.

[0144] In this way, through the design of the up key, the user can conveniently unlock and turn on the screen of the recorder, reducing the operation steps and improving the user experience. When the control module receives the high-level signal again within the fourth preset time period after receiving the high-level signal for the first time, the first preset number of pieces of data that are not displayed among the data that are not displayed are displayed. This design helps the user to view the data in chronological order, avoids repeated viewing of read data, and improves the efficiency of data management.

[0145] Optionally, the down key is further included;

[0146] The down key is connected with the control module;

[0147] When the down key is pressed, a second high-level signal is output to the control module, and the control module controls the screen of the recorder to display the first preset number of data after the currently displayed first preset number of data when receiving the second high-level signal and the screen of the recorder being in the lighted state.

[0148] Specifically, when the down key is pressed, a second high-level signal is output to the control module, and the control module controls the screen of the recorder to display the first preset number of data after the currently displayed first preset number of data when receiving the second high-level signal and the screen of the recorder being in the lighted state.

[0149] In this way, by means of the explicit high-level signal and the judgment of the screen lighted state, it is ensured that the operation of the down key only takes effect in appropriate cases, the possibility of misoperation is reduced, and the accuracy of operation is improved. When the user presses the down key, the recorder displays the first preset number of data after the currently displayed first preset number of data. This design enables the user to quickly browse a large amount of data, and improves the efficiency of data access and browsing.

[0150] Optionally, the tag key is further included;

[0151] The tag key is connected with the control module;

[0152] When the tag key is pressed, a third high-level signal is output to the control module, and the control module is configured to time from receiving the third high-level signal and tag the voltage data received within a fifth preset time period.

[0153] Specifically, when the tag key is pressed, a third high-level signal is output to the control module, and the control module times from receiving the third high-level signal and tags the voltage data received within a fifth preset time period.

[0154] In this way, by means of the design of the tag key, the user can mark the voltage data collected by the recorder within a specific time period. This function helps the user to quickly locate and identify key data during subsequent data analysis, and improves the efficiency of data analysis.

[0155] Other embodiments of this application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0156] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application.

[0157] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the above-described device embodiments are merely illustrative, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, multiple modules can be combined or integrated into another system, or some features can be ignored or not executed.

[0158] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or also include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0159] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0160] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields using the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A stray current data recorder characterized by, The method comprises the following steps: The control module, the resistance conversion module and the voltage measurement module are connected with each other; The resistance conversion module and the voltage measurement module are respectively connected in parallel with the resistance to be measured; The voltage measurement module is configured to collect voltage data across the resistance to be measured and send the voltage data to the control module; The control module is configured to output a first electrical signal to the resistance conversion module; The resistance conversion module is configured to adjust the resistance of the branch in which the resistance conversion module is located to a first reference resistance after receiving the first electrical signal; The control module is further configured to output a second electrical signal to the resistance conversion module; The resistance conversion module is further configured to adjust the resistance of the branch in which the resistance conversion module is located to a second reference resistance after receiving the second electrical signal; The control module is further configured to determine the real voltage across the resistance to be measured according to the first reference resistance, the second reference resistance and the voltage data. The resistance conversion module comprises a switching switch, a first reference resistance and a second reference resistance; 2. The recorder of claim 1, wherein, The first end of the switching switch is connected with the first end of the resistance to be measured, the second end of the switching switch is connected with the first end of the first reference resistance, the third end of the switching switch is connected with the first end of the second reference resistance, and the fourth end of the switching switch is connected with the control module; The second end of the resistance to be measured is connected with the second end of the first reference resistance and the second end of the second reference resistance respectively; The switching switch is configured to turn on the first end and the second end of the switching switch after receiving the first electrical signal, and turn off the first end and the second end of the switching switch after a first preset time period, and turn on the first end and the third end of the switching switch after receiving the second electrical signal, and turn off the first end and the third end of the switching switch after a first preset time period. The resistance conversion module comprises a first switch, a second switch, a first reference resistance and a second reference resistance; 3. The recorder of claim 1, wherein, The first end of the resistance to be measured is connected with the first end of the first switch and the first end of the second switch respectively; The second end of the first switch is connected with the first end of the first reference resistance; The second end of the second switch is connected with the first end of the second reference resistance; The first switch and the second switch are connected with the control module; The second end of the resistance to be measured is connected with the second end of the first reference resistance and the second end of the second reference resistance respectively; The first switch is configured to close after receiving the first electrical signal and open after a second preset time period; The second switch is configured to close after receiving the second electrical signal and open after a second preset time period. The difference between the first reference resistance and the second reference resistance is between 10MΩ and 100MΩ, the first reference resistance is greater than the second reference resistance, and the first reference resistance is between 1MΩ and 20MΩ.

4. The recorder of claim 1, wherein, The resistance conversion module comprises a light controller, a light source and a photoresistor; 5. The recorder of claim 1, wherein, The photoresistor is connected in parallel with the resistance to be measured; The light controller is connected with the control module and the light source respectively; ​ The light controller is configured to adjust the brightness of the light source to a first preset brightness after receiving the first electrical signal; when the brightness of the light source is the first preset brightness, the resistance value of the photoresistor is a first reference resistance; The light controller is further configured to adjust the brightness of the light source to a second preset brightness after receiving the second electrical signal; when the brightness of the light source is the second preset brightness, the resistance value of the photoresistor is a second reference resistance.

6. The recorder of claim 1, wherein, The resistance conversion module comprises a temperature controller and a thermistor; The thermistor is connected in parallel with the resistance to be measured; The temperature controller is connected with the control module; The temperature controller is configured to adjust the temperature around the thermistor to a first preset temperature after receiving the first electrical signal, and when the temperature around the thermistor is the first preset temperature, the resistance value of the thermistor is a first reference resistance; The temperature controller is configured to adjust the temperature around the thermistor to a second preset temperature after receiving the second electrical signal, and when the temperature around the thermistor is the second preset temperature, the resistance value of the thermistor is a second reference resistance.

7. The recorder according to any one of claims 1 to 6, characterized in that Further comprising: a vibration sensor; The vibration sensor is connected with the control module; The vibration sensor is configured to collect a parameter value corresponding to a vibration parameter around the vibration sensor and transmit the parameter value to the control module; The control module is configured to start timing from when the parameter value is greater than a preset parameter value, and label voltage data received within a third preset time period.

8. The recorder according to any one of claims 1 to 6, characterized in that Further comprising: an up key; The up key is connected with the control module; When the up key is pressed, a first high-level signal is output to the control module, and the control module controls the screen of the recorder to be unlocked and lit when the first high-level signal is received for the first time, and displays the first preset number of recently collected data on the screen of the recorder; The control module is further configured to control the screen of the recorder to display the first preset number of recently collected data among the data that has not been displayed when the first high-level signal is received for the second time within a fourth preset time period after the first high-level signal is received for the first time.

9. The recorder of claim 8, wherein, Further comprising: a down key; The down key is connected with the control module; When the down key is pressed, a second high-level signal is output to the control module, and the control module controls the screen of the recorder to display the first preset number of data after the first preset number of data currently displayed when the second high-level signal is received and the screen of the recorder is in the lit state.

10. The recorder of claim 1, wherein, Further comprising: a label key; The label key is connected with the control module; When the label key is pressed, a third high-level signal is output to the control module, and the control module is configured to start timing from when the third high-level signal is received, and label voltage data received within a fifth preset time period.

Images