Railway signal relay resistance measuring device

Abstract

The application discloses a kind of railway signal relay resistance measuring device, by being provided with the measuring platform of power supply, ohmmeter and voltmeter for relay, at least one relay group containing two relays is placed on the measuring platform, by the normally closed contact in one relay and the normally open contact in another relay are connected in series on a power supply, again for one of the coils to be measured on the relay in series with a power supply, so that the corresponding resistance value and voltage value are measured by ohmmeter and voltmeter on the measuring platform, whereby the contact resistance of one relay and the coil resistance of another relay can be calculated according to the resistance value and voltage value, and the coil resistance of one relay and the contact resistance of another relay can be obtained by exchanging the positions of the two relays, thereby realizing automatic resistance measurement without manually measuring the resistance of the relay, improving the efficiency of resistance measurement.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a measuring device for the resistance of a railway signal relay. Background Technology

[0002] Currently, the resistance in railway signal relays is usually measured manually, but this method has the drawback of low measurement efficiency. Summary of the Invention

[0003] In view of this, this application provides a measuring device for the resistance of railway signal relays, used to achieve automatic resistance measurement and improve measurement efficiency. As follows:

[0004] A device for measuring the resistance of a railway signal relay, comprising:

[0005] A measurement platform; the measurement platform is equipped with a first power supply, a second power supply, multiple resistance meters, and multiple voltmeters;

[0006] Furthermore, the measuring platform is used to place at least one relay group, which includes: a first relay and a second relay;

[0007] The first relay includes multiple switching structures;

[0008] The second relay includes multiple switching structures and coils, wherein the switching structures include a common contact, a normally closed contact, and a normally open contact;

[0009] In one case:

[0010] The normally closed contact of each switch structure in the first relay and the normally open contact of each switch structure in the second relay are connected in series across the first power supply.

[0011] The coil in the second relay is connected in series across the second power supply.

[0012] In the first relay, a voltmeter is connected in parallel between the common contact and the normally closed contact in each switching structure;

[0013] In the second relay, the voltmeter is connected in parallel between the common contact and the normally open contact in each switching structure;

[0014] The ohmmeter is connected in parallel between the two ends of the coil in the first relay;

[0015] Wherein, the first power supply is used to output a first current, and the second power supply is used to output a first voltage, so that the ohmmeter outputs a first resistance value and the voltmeter outputs a first voltage value. The first resistance value and the first voltage value can be used to obtain the contact resistance of the first relay and the coil resistance of the second relay.

[0016] Preferably, the above-mentioned railway signal relay resistance measuring device is equipped with a temperature regulating device, the temperature regulating device has a measuring space, and the railway signal relay resistance measuring device is placed in the measuring space;

[0017] The temperature adjustment device is used to adjust the temperature value in the measurement space so that the temperature value in the measurement space is within the target temperature range after the first power supply and the second power supply output current, that is, the temperature value in the measurement space is within the target temperature range after the first power supply outputs the first current and the second power supply outputs the first voltage.

[0018] Preferably, in the above-mentioned railway signal relay resistance measuring device, the temperature regulating device adjusts the temperature value within the measuring space through a temperature compensation value;

[0019] The temperature compensation value is related to the contact temperature rise and coil temperature rise of the first relay.

[0020] The contact temperature rise value is the temperature rise of the contacts of the first relay after the first power supply output current continues for the target duration, and the coil temperature rise value is the temperature rise of the coil of the second relay after the second power supply output current continues for the target duration.

[0021] Preferably, in the above-mentioned railway signal relay resistance measuring device, the target duration is greater than or equal to 15 minutes and less than or equal to 30 minutes.

[0022] Preferably, in the above-mentioned railway signal relay resistance measuring device, the temperature compensation value is the negative of the maximum value between the contact temperature rise value and the coil temperature rise value.

[0023] Preferably, in the aforementioned railway signal relay resistance measuring device, the normally closed contact of each switching structure in the first relay and the normally open contact of each switching structure in the second relay are connected in series across a first power supply, comprising:

[0024] A first power supply is connected between the common contact of the first switch structure in the first relay and the normally open contact of the second switch structure in the second relay;

[0025] The common contact of the third switch structure in the first relay is connected to the normally open contact of the fourth switch structure in the second relay;

[0026] The normally closed contact in the first switch structure and the normally closed contact in the third switch structure are connected in series with the common contact and normally closed contact in the other switch structures in the first relay;

[0027] The common contact in the second switch structure and the common contact in the fourth switch structure are connected in series with the normally open contacts and the common contacts in the other switch structures of the second relay.

[0028] Preferably, in the above-mentioned railway signal relay resistance measuring device, the first current is a constant current, and the current value of the first current is greater than or equal to 0.5A and less than or equal to a first value, wherein the first value is less than or equal to the rated current of the first relay.

[0029] The second power source is a DC power source.

[0030] Preferably, in the above-mentioned railway signal relay resistance measuring device, the clamping force when each contact of the first relay and the second relay is connected is greater than or equal to 5 Newtons and less than or equal to 12 Newtons.

[0031] Preferably, the above-mentioned measuring device for the resistance of railway signal relays further includes:

[0032] The data collector is used to collect the device identifier of the first relay and the device identifier of the second relay;

[0033] The display screen is used to output the device identifier of the first relay, the contact resistance of the first relay, the device identifier of the second relay, and the coil resistance of the second relay.

[0034] A device for measuring the resistance of a railway signal relay, comprising:

[0035] A measurement platform; the measurement platform is equipped with a first power supply, a second power supply, multiple resistance meters, and multiple voltmeters;

[0036] Furthermore, the measuring platform is used to place at least one relay group, which includes: a first relay and a second relay;

[0037] The first relay includes multiple switching structures and coils;

[0038] The second relay includes multiple switching structures, each including a common contact, a normally closed contact, and a normally open contact;

[0039] The normally closed contact of each switch structure in the second relay and the normally open contact of each switch structure in the first relay are connected in series across the first power supply.

[0040] The coil in the first relay is connected in series across the second power supply.

[0041] In the second relay, a voltmeter is connected in parallel between the common contact and the normally closed contact in each switching structure;

[0042] In the first relay, a voltmeter is connected in parallel between the common contact and the normally open contact in each switching structure;

[0043] A ohmmeter is connected in parallel between the two ends of the coil in the second relay;

[0044] Wherein, the first power supply is used to output a first current, and the second power supply is used to output a first voltage, so that the ohmmeter outputs a second resistance value and the voltmeter outputs a second voltage value. The second resistance value and the second voltage value can be used to obtain the contact resistance of the second relay and the coil resistance of the first relay.

[0045] As can be seen from the above technical solution, the railway signal relay resistance measuring device provided in this application, by setting up a measuring platform with a power supply, a ohmmeter, and a voltmeter for the relay, places at least one relay group containing two relays on the measuring platform, connects the normally closed contact of one relay and the normally open contact of another relay in series with a power supply, and connects a power supply in series with the coil to be measured on one of the relays. In this way, the corresponding resistance and voltage values ​​are measured by the ohmmeter and voltmeter on the measuring platform. Based on the resistance and voltage values, the contact resistance of one relay and the coil resistance of the other relay can be calculated. By exchanging the positions of the two relays, the coil resistance of one relay and the contact resistance of the other relay can be obtained. This realizes automated resistance measurement without the need for manual resistance measurement of the relays, thus improving the efficiency of resistance measurement. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 A schematic diagram of the structure of a railway signal relay resistance measuring device provided in Embodiment 1 of this application;

[0048] Figure 2This is an example diagram of a switch structure in a relay;

[0049] Figure 3 and Figure 4 Another structural schematic diagram of a railway signal relay resistance measuring device provided in Embodiment 1 of this application;

[0050] Figure 5 This is a schematic diagram of the structure of a railway signal relay resistance measuring device provided in Embodiment 2 of this application;

[0051] Figure 6 This is a schematic diagram of the measuring device in this application;

[0052] Figure 7 This is an example diagram of the test fixture structure in this application;

[0053] Figure 8 This is an example diagram of the test interface in this application. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] refer to Figure 1 The diagram shown is a structural schematic of a railway signal relay resistance measuring device provided in Embodiment 1 of this application. The device may include the following structure:

[0056] Measurement platform P; Measurement platform P is equipped with a first power supply D1, a second power supply D2, multiple ohmmeters R and multiple voltmeters V;

[0057] Furthermore, the measurement platform P is used to place at least one relay group. Taking one of the relay groups as an example, the relay group may include the following structure: a first relay JT1 and a second relay JT2.

[0058] The first relay JT1 contains multiple switching structures, such as Figure 1 The JT1-Z1, JT1-Z2, JT1-Z3, JT1-Z4, JT1-Z5, JT1-Z6, JT1-Z7, and JT1-Z8 shown in the diagram, the first relay JT1 also includes a coil, such as JT1(1) and JT1(2).

[0059] The second relay JT2 contains multiple switching structures, such as Figure 1As shown in JT2-Z1, JT2-Z2, JT2-Z3, JT2-Z4, JT2-Z5, JT2-Z6, JT2-Z7, and JT2-Z8, the second relay JT2 also includes a coil, such as JT2(1) and JT2(2).

[0060] The switching structures of both the first relay JT1 and the second relay JT2 include a common contact, a normally closed contact, and a normally open contact, such as... Figure 2 As shown in the image.

[0061] The normally closed contact of each switch structure in the first relay JT1 and the normally open contact of each switch structure in the second relay JT2 are connected in series across the first power supply D1. Specifically, as follows... Figure 1 As shown: a first power supply D1 is connected between the common contact of the first switch structure JT1-Z1 in the first relay JT1 and the normally open contact of the second switch structure JT2-Z8 in the second relay JT2; the common contact of the third switch structure JT1-Z8 in the first relay JT1 is connected to the normally open contact of the fourth switch structure JT2-Z1 in the second relay JT2; the normally closed contact of the first switch structure JT1-Z1 and the normally closed contact of the third switch structure JT1-Z8 are connected in series with the common contacts and normally closed contacts of other switch structures in the first relay JT1; the common contact of the second switch structure JT2-Z8 and the common contact of the fourth switch structure JT2-Z1 are connected in series with the normally open contacts and common contacts of other switch structures in the second relay JT2.

[0062] The coil in the second relay JT2 is connected in series across the second power supply D2, such as... Figure 1 As shown, JT2(1) and JT2(2) are connected in series and form a closed circuit with the second power supply D2.

[0063] In the first relay JT1, a voltmeter V is connected in parallel between the common contact and the normally closed contact in each switching structure;

[0064] In the second relay JT2, a voltmeter V is connected in parallel between the common contact and the normally open contact in each switching structure;

[0065] A resistor R is connected in parallel between the two ends of the coil in the first relay JT1, for example... Figure 1 As shown, JT1(1) is connected in parallel with a resistor R, and JT1(2) is connected in parallel with a resistor R;

[0066] The first power supply D1 is used to output a first current, and the second power supply D2 is used to output a first voltage, so that the ohmmeter R outputs a first resistance value and the voltmeter V outputs a first voltage value. The first resistance value and the first voltage value can be used to obtain the contact resistance of the first relay JT1 and the coil resistance of the second relay JT2.

[0067] As can be seen from the above scheme, in the railway signal relay resistance measuring device provided in Embodiment 1 of this application, a measuring platform with a power supply, a ohmmeter, and a voltmeter is set up for the relay. At least one relay group containing two relays is placed on the measuring platform. The normally closed contact of one relay and the normally open contact of another relay are connected in series with a power supply. Then, a power supply is connected in series with the coil to be measured on one of the relays. In this way, the corresponding resistance and voltage values ​​are measured by the ohmmeter and voltmeter on the measuring platform. Based on the resistance and voltage values, the contact resistance of one relay and the coil resistance of the other relay can be calculated. By exchanging the positions of the two relays, the coil resistance of one relay and the contact resistance of the other relay can be obtained. This realizes automated resistance measurement without the need for manual resistance measurement of the relays, thus improving the efficiency of resistance measurement.

[0068] In one implementation, the measuring device for the resistance of the railway signal relay is equipped with a temperature regulating device W, which has a measuring space C, such as... Figure 3 As shown in the figure, the measuring device for the resistance of railway signal relays, such as the measuring platform P equipped with relay groups, is placed in the measuring space C;

[0069] The temperature control device W is used to adjust the temperature value within the measurement space C so that the temperature value within the measurement space C is within the target temperature range after the first power supply D1 and the second power supply D2 output current. Specifically, the temperature value within the measurement space C is within the target temperature range after the first power supply D1 outputs the first current and the second power supply D2 outputs the first voltage. The target temperature range is used to achieve the desired temperature in the relay measurement scenario. For example, the target temperature range can be -10℃ to 45℃, with an adjustment accuracy of 0.05℃ to 0.1℃ or 0.01℃ to 0.05℃. This compensates for the measurement inaccuracies caused by temperature rise when measuring the contact resistance and coil resistance of the relay, thereby solving the influence of temperature rise on the accuracy of resistance measurement and improving the accuracy of resistance measurement.

[0070] Specifically, the temperature control device W adjusts the temperature value within the measurement space C through a temperature compensation value;

[0071] Among them, the temperature compensation value is related to the contact temperature rise and coil temperature rise of the first relay JT1;

[0072] The contact temperature rise value is the temperature increase of the contacts of the first relay JT1 after the first power supply D1 outputs the first current (i.e., the first current) for a target duration. The coil temperature rise value is the temperature rise of the coil of the second relay JT2 after the second power supply D2 outputs the first current (i.e., the first voltage) for a target duration. For example, the temperature compensation value is the negative of the maximum value between the contact temperature rise value and the coil temperature rise value. Thus, the temperature regulating device W uses the negative temperature to compensate for the positive temperature rise.

[0073] The target duration is greater than or equal to 15 minutes and less than or equal to 30 minutes. That is, after energizing the first power supply D1 and the second power supply D2, the contacts and coils of the first relay JT1 and the second relay JT2 heat up, causing a temperature rise. After 15 to 30 minutes, the temperature rise of the first relay JT1 and the second relay JT2 reaches a stable state. Based on this, the temperature regulating device W adjusts the temperature value within the measurement space C according to the temperature compensation value, ensuring that the temperature value within the measurement space C reaches a stable state and is within the target temperature range. Furthermore, it can maintain this temperature for 15 to 30 minutes to facilitate the measurement of the relay resistance.

[0074] In one implementation, the first power source is a constant current source, providing current to the contacts. The first current output by the first power source is a constant current, and its value is greater than or equal to 0.5A and less than or equal to a first value, which is less than or equal to the rated current of the first relay; for example, the first current is 1A. The second power source is a constant voltage source, providing a pull-in voltage to the coil. Specifically, the second power source is a DC power source, and the first voltage output can be a 24V voltage signal. For example, the second power source is a 24V DC power source.

[0075] In one implementation, the clamping force when each contact of the first relay JT1 and the second relay JT2 is connected is greater than or equal to 5 Newtons and less than or equal to 12 Newtons. When the user installs the first relay JT1 and the second relay JT2 in the relay group onto the measuring platform P, a certain clamping force can be maintained between each contact in each switch structure and the connection point on the measuring platform P. The clamping force can be in the range of 5N to 12N, which can reduce the contact resistance during measurement and prevent excessive wear of the relay pins due to excessive clamping force.

[0076] In one implementation, the railway signal relay resistance measuring device in this embodiment may further include the following structure, such as... Figure 4 As shown:

[0077] The data acquisition device Y, such as a barcode scanner, is used to collect the device identifier of the first relay JT1 and the device identifier of the second relay JT2; the device identifier can be a serial number, manufacturer information, sample parameter information, etc.

[0078] Display X is used to output the device identifier of the first relay JT1, the contact resistance of the first relay JT1, the device identifier of the second relay JT2, and the coil resistance of the second relay JT2.

[0079] refer to Figure 5 This is a schematic diagram of the structure of a railway signal relay resistance measuring device provided in Embodiment 2 of this application. The device may include the following structure:

[0080] Measurement platform P; Measurement platform P is equipped with a first power supply D1, a second power supply D2, multiple ohmmeters R and multiple voltmeters V;

[0081] Furthermore, the measurement platform P is used to place at least one relay group, which includes: a first relay JT1 and a second relay JT2;

[0082] The first relay JT1 contains multiple switching structures, such as Figure 5 The JT1-Z1, JT1-Z2, JT1-Z3, JT1-Z4, JT1-Z5, JT1-Z6, JT1-Z7, and JT1-Z8 shown in the diagram, the first relay JT1 also includes a coil, such as JT1(1) and JT1(2).

[0083] The second relay JT2 contains multiple switching structures, such as Figure 5 As shown in JT2-Z1, JT2-Z2, JT2-Z3, JT2-Z4, JT2-Z5, JT2-Z6, JT2-Z7, and JT2-Z8, the second relay JT2 also includes a coil, such as JT2(1) and JT2(2).

[0084] The switching structures of both the first relay JT1 and the second relay JT2 include a common contact, a normally closed contact, and a normally open contact, such as... Figure 2 As shown;

[0085] In the second relay JT2, the normally closed contact of each switch structure and the normally open contact of each switch structure in the first relay JT1 are connected in series across the first power supply D1. Specifically, as follows... Figure 5As shown: a first power supply D1 is connected between the common contact of the fourth switch structure JT2-Z1 in the second relay JT2 and the normally open contact of the second switch structure JT1-Z8 in the first relay JT1; the common contact of the second switch structure JT2-Z8 in the second relay JT2 is connected to the normally open contact of the first switch structure JT1-Z1 in the first relay JT1; the normally closed contact of the fourth switch structure JT2-Z1 and the normally closed contact of the second switch structure JT2-Z8 are connected in series with the common contacts and normally closed contacts of other switch structures in the second relay JT2; the common contact of the first switch structure JT1-Z1 and the common contact of the third switch structure JT1-Z8 are connected in series with the normally open contacts and common contacts of other switch structures in the first relay JT1.

[0086] The coil of the first relay JT1 is connected in series across the second power supply D2, as follows: Figure 5 As shown, JT1(1) and JT1(2) are connected in series and form a closed circuit with the second power supply D2.

[0087] In the second relay JT2, a voltmeter V is connected in parallel between the common contact and the normally closed contact in each switching structure;

[0088] In the first relay JT1, a voltmeter V is connected in parallel between the common contact and the normally open contact in each switching structure;

[0089] A resistance meter R is connected in parallel between the two ends of the coil in the second relay JT2;

[0090] The first power supply D1 is used to output the first current, and the second power supply D2 is used to output the first voltage, so that the ohmmeter R outputs the second resistance value and the voltmeter V outputs the second voltage value. The second resistance value and the second voltage value can be used to obtain the contact resistance of the second relay JT2 and the coil resistance of the first relay JT1.

[0091] As can be seen from the above scheme, in the railway signal relay resistance measuring device provided in Embodiment 2 of this application, a measuring platform with a power supply, a ohmmeter, and a voltmeter is set up for the relay. At least one relay group containing two relays is placed on the measuring platform. By connecting the normally closed contact of one relay and the normally open contact of another relay in series with a power supply, and then connecting the coil to be measured on one of the relays in series with a power supply, the corresponding resistance and voltage values ​​are measured by the ohmmeter and voltmeter on the measuring platform. Based on the resistance and voltage values, the contact resistance of one relay and the coil resistance of the other relay can be calculated. By exchanging the positions of the two relays, the coil resistance of one relay and the contact resistance of the other relay can be obtained. This realizes automated resistance measurement without the need for manual resistance measurement of the relays, thus improving the efficiency of resistance measurement.

[0092] The following provides examples illustrating specific implementations of the embodiments in this application:

[0093] This application enables the automatic measurement of the coil resistance and contact resistance of railway signal relays, achieving an efficiency improvement of more than 30 times compared to manual measurement. The railway signal relay resistance measuring device in this application can include modules such as an automated measuring platform, measuring fixtures, and measuring software. Correspondingly, this application provides an automatic measurement method for the coil resistance and contact resistance of railway signal relays.

[0094] like Figure 6 The diagram shown is an architectural diagram of the measuring device in this application.

[0095] Figure 6 The measuring device can be composed of five main modules: an automatic measuring platform, measuring fixtures, sample information barcode input, temperature control device, and measuring program module. Among them:

[0096] 1. The automatic measurement platform includes components such as a constant voltage source, a constant current source, an ohmmeter, a voltmeter, and a multiplexer. The constant current source can provide a constant current of 0.1~10A for measuring the resistance of relay coils and contact resistance. The voltmeter and ohmmeter can accurately display the measured voltage and resistance values. The multiplexer is used to automatically switch the voltage measurement of the object under test by setting the path.

[0097] 2. The measuring fixture structure and circuit are as follows: Figure 7 , Figure 1 , Figure 5 As shown, a railway signal relay is installed during measurement and a certain clamping force is maintained, ranging from 5N to 12N. This reduces the contact resistance during measurement and prevents excessive wear of the relay pins due to excessive clamping force. The fixture can be expanded to N sets as needed, thereby allowing simultaneous measurement of the contact resistance and coil resistance of N relays, greatly improving measurement efficiency.

[0098] 3. The measurement program module is controlled by a host computer, generating result reports and forming the final measurement results. The result reports are developed using LabVIEW and output as .xml files, while the final results are output as .xlsx files. The measurement program is designed around the TestStand sequence management software. The measurement sequence controls the instrument by calling a driver module written in LabVIEW. Measurement sequences are written for different relay models and can be directly called during measurement. During measurement, the sample is connected to a specific measuring fixture, and the TestStand sequence is started with one click to output the measurement results in the *.xml file. The corresponding measurement values ​​are then obtained from the *.xml file using Python code, and the measurement interface developed using Pyside2 is used, such as... Figure 8 As shown, the measurement personnel can easily complete the entire measurement process through a simple human-computer interface, realizing one-click output of measurement values ​​and appending them to the *.xlsx record table, and outputting these measurement values ​​through the measurement interface on the monitor.

[0099] 4. The sample information scanning input module consists of a barcode scanner and its scanning software. It can automatically import relay sample information into the measurement system. The sample information includes the sample serial number, manufacturer information, sample parameter information, etc. It can avoid the problems of low efficiency and easy error in manual input of sample information, and improve the efficiency and accuracy of sample information input.

[0100] 5. The temperature control device allows for temperature adjustment within a range of -10℃ to 45℃, with an accuracy of 0.05℃ to 0.1℃. This compensates for the impact of temperature rise on the accuracy of resistance measurements when using the voltmeter-ammeter method to measure relay contact and coil resistance. It solves the problem of temperature rise affecting resistance measurement accuracy and improves the measurement precision. During resistance measurement, the relay sample should first be placed in the temperature control device, then an appropriate temperature compensation value should be set. The resistance measurement should only be performed after the sample temperature has stabilized. Detailed measurement procedures are described in the measurement method section.

[0101] based on Figure 1 and Figure 5 The circuit shown in this application is measured using the following method:

[0102] Step 1: Sample Installation

[0103] Two or 2n relays are inserted back-to-back into the measuring fixture, with an even number of relays measured each time, and placed in the temperature control device.

[0104] Step 2: Temperature Compensation

[0105] (1) Connect the normally closed contact of relay No. 1 in series, and connect the normally open contact of relay No. 2 in series (the coil of this relay is energized), such as Figure 7 The test fixture structure and Figure 1 As shown in the test fixture circuit, depending on the rated current of the sample (relay) being measured, the constant current source of the automated measurement platform provides a DC current of 0.5~10A, and 1A is recommended.

[0106] (2) Continuous power supply will cause the relay contacts and coil to heat up and reach thermal stability. The recommended power supply time is 15~30 minutes. The relay contacts and coil will heat up after being powered on, resulting in a temperature rise, which will eventually cause the relay temperature rise to reach a stable state.

[0107] (3) Let the ambient temperature during measurement be T0, and use a temperature measuring device such as an infrared thermometer to measure the temperature of the relay contacts and coil respectively as T1 and T2. The accuracy of the temperature measuring device is 0.01℃~0.05℃; then the contact temperature rise is D1=T1-T0, and the coil temperature rise is D2=T2-T0.

[0108] (4) Take the maximum value between D1 and D2, i.e., max(D1,D2) as the temperature compensation value;

[0109] (5) Set the temperature of the temperature control device to -max(D1,D2); that is, use the negative temperature to compensate for the positive temperature rise.

[0110] (6) Turn on the temperature control device to make the temperature of the sample reach a stable state. The temperature is usually maintained for 15 to 30 minutes.

[0111] Step 3: Contact resistance and coil resistance measurement (taking the simultaneous measurement of 2 relay samples as an example; the principle is the same if 2N relays are measured simultaneously):

[0112] (1) Use an automated measuring station to apply the rated pull-in voltage to the coil to make the relay pull in. Use the constant current source of the automated measuring station to apply a current of 0.5~XA (X≤ the rated current of the sample relay) between the series contacts. The recommended current is 1A.

[0113] (2) Connect the normally closed contact of relay No. 1 in series, the normally open contact of relay No. 2 in series, and the coil of relay No. 2 in series. The circuit is shown below. Figure 1 As shown.

[0114] (3) Measure relay No. 1 as follows Figure 1 The coil resistance value of JT1 in the circuit is typically measured with an accuracy of 0.01~0.05Ω.

[0115] (4) Measure relay No. 2 as follows Figure 1The coil pull-in voltage of JT2 in the circuit is typically measured with an accuracy of 0.01V to 0.05V.

[0116] (5) Measure the given contact point ( Figure 1 The current for JT1 and JT2 is typically 0.5A to 10A, with 1A recommended.

[0117] (6) Measure each contact point ( Figure 1 Voltage drop in JT1 and JT2;

[0118] (7) The contact resistance is calculated using the voltmeter-ammeter method, i.e., R = U / I;

[0119] (8) Using a barcode scanning device, scan the serial number barcode of the relay sample in the order of relay 1 (JT1) and relay 2 (JT2);

[0120] (9) Swap relays JT1 and JT2, i.e., insert JT1 into measuring fixture 2 and JT2 into measuring fixture 1. The measuring circuit at this time is shown in the figure. Figure 5 As shown.

[0121] (10) Repeat steps (3) to (7) to complete the measurement of the contact resistance and coil resistance of relays JT1 and JT2.

[0122] In the above measurement method, steps (3) to (7) can complete the circuit diagram for measuring the contact resistance of JT1 and the coil resistance of JT2. After swapping JT1 and JT2, steps (9) to (10) can complete the measurement of the coil resistance of JT1 and the contact resistance of JT2. Thus, the measurement of the contact resistance and coil resistance of the two relays, JT1 and JT2, is completed.

[0123] In summary, the contact resistance and coil resistance measuring device for railway signal relays implemented in this application comprises an automatic measuring platform, measuring fixtures, sample information barcode input, temperature control device, and measuring program module, etc. Figure 6 As shown. The method for measuring the contact resistance and coil resistance of a railway signal relay in this application includes: first, relay installation; second, temperature compensation; and third, measurement of contact resistance and coil resistance. Details are provided in the measurement method described above.

[0124] Therefore, the technical solution in this application has the following advantages:

[0125] (1) The contact resistance and coil resistance measuring device can simultaneously measure the contact resistance and coil resistance of 2 or 2N relays. Taking the simultaneous measurement of 2 relay samples as an example, the contact resistance of JT1 (relay 1) and the coil resistance of JT2 can be measured the first time. After JT1 and JT2 are swapped, the coil resistance of JT1 and the contact resistance of JT2 can be measured the second time. The measuring fixture in this device is expandable. By simply increasing the number of multiplexed switches, the measurement of 2N samples can be completed simultaneously. Theoretically, it can be expanded infinitely under the premise that the power supply capacity allows it.

[0126] (2) In the measurement method, the temperature compensation method is adopted to eliminate the influence of the temperature rise of the relay contacts and coil on the resistance measurement accuracy. Therefore, its resistance measurement accuracy is higher than that of the existing methods.

[0127] (3) This application uses automated measurement, which does not require manual input of sample information or manual measurement at each measurement point. The parameter measurement of all measurement points is controlled by the automatic measurement program, which is highly efficient and avoids errors caused by manual input of parameters.

[0128] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0129] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0130] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0131] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the resistance of a railway signal relay, characterized in that, The device comprises: a measuring platform; a first power supply, a second power supply, a plurality of resistance tables and a plurality of voltage tables are arranged on the measuring platform; and the measuring platform is used to place at least one relay group, the relay group comprises: a first relay comprising a plurality of switch structures; a second relay comprising a plurality of switch structures and a coil, the switch structure comprising a common contact, a normally closed contact and a normally open contact; the normally closed contact in each switch structure in the first relay and the normally open contact in each switch structure in the second relay are connected in series across the first power supply; the coil in the second relay is connected in series across the second power supply; the voltage table is connected in parallel between the common contact and the normally closed contact in each switch structure in the first relay; the voltage table is connected in parallel between the common contact and the normally open contact in each switch structure in the second relay; the resistance table is connected in parallel between the coil in the first relay; wherein the first power supply is used to output a first current, and the second power supply is used to output a first voltage, so that: according to the first voltage and the first current, the coil resistance of the second relay is determined; and according to the first current and the voltage value output by the voltage table, the contact resistance of the first relay is obtained; and so that: after the arrangement positions of the first relay and the second relay are exchanged, according to the first voltage and the first current, the coil resistance of the first relay is determined; and according to the first current and the voltage value output by the voltage table, the contact resistance of the second relay is obtained; wherein the railway signal relay resistance measuring device is provided with a temperature adjusting device, the temperature adjusting device has a measuring space, and the railway signal relay resistance measuring device is placed in the measuring space; wherein the temperature adjusting device is used to adjust the temperature value in the measuring space, so that the temperature value in the measuring space is in a target temperature range after the first power supply and the second power supply output currents.

2. The apparatus for measuring the resistance of a railway signal relay according to claim 1, characterized in that, The temperature adjusting device adjusts the temperature value in the measuring space through a temperature compensation value; wherein the temperature compensation value is related to a contact temperature rise value and a coil temperature rise value of the first relay; the contact temperature rise value is the temperature rise value of the contact of the first relay after the first power supply outputs a current for a target duration, and the coil temperature rise value is the temperature rise value of the coil of the second relay after the second power supply outputs a current for the target duration.

3. The apparatus for measuring the resistance of a railway signal relay according to claim 2, characterized in that, The target duration is greater than or equal to 15 minutes and less than or equal to 30 minutes.

4. The apparatus for measuring the resistance of a railway signal relay according to claim 2, characterized in that, The temperature compensation value is the negative value of the maximum value of the contact temperature rise value and the coil temperature rise value.

5. The apparatus for measuring resistance of a railway signal relay according to claim 1, wherein The normally closed contact in each switch structure in the first relay and the normally open contact in each switch structure in the second relay are connected in series across the first power supply, comprising: the common contact in the first switch structure in the first relay is connected with the normally open contact in the second switch structure in the second relay through the first power supply; the common contact in the third switch structure in the first relay is connected with the normally open contact in the fourth switch structure in the second relay; The normally closed contact in the first switch structure and the normally closed contact in the third switch structure are connected in series with the common contact and the normally closed contact in other switch structures in the first relay in turn; The common contact in the second switch structure and the common contact in the fourth switch structure are connected in series with the normally open contact and the common contact in other switch structures in the second relay in turn.

6. The apparatus for measuring resistance of a railway signal relay according to claim 1, wherein The first current is a constant current, and a current value of the first current is greater than or equal to 0.5 A and less than or equal to a first value, the first value being less than or equal to a rated current of the first relay; The second power supply is a direct current power supply.

7. The apparatus for measuring resistance of a railway signal relay according to claim 1, wherein A clamping force of each contact in the first relay and the second relay when connected is greater than or equal to 5 Newton and less than or equal to 12 Newton.

8. The apparatus for measuring the resistance of a railway signal relay according to claim 7, characterized in that, Further comprising: A collector for collecting a device identifier of the first relay and a device identifier of the second relay; A display screen for outputting the device identifier of the first relay, a contact resistance of the first relay, the device identifier of the second relay and a coil resistance of the second relay.

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