Pressure timer and field bicycle segmented timing system

Abstract

The utility model provides a pressure timer and a site bicycle segmented timing system, which are used for solving the technical problems that a timing acquisition terminal device is damaged by bicycle body electrostatic discharge of an existing site bicycle pressure timing system and signal transmission of the timing system is interfered. The pressure timer comprises a timing belt and a timing acquisition terminal; the timing belt is connected with the timing acquisition terminal; the timing belt is attached to a bicycle training ground, a metal covering layer is attached to the upper end face of the timing belt and connected with a ground zero potential through a ground wire, one end of the timing belt ground resistor is connected with the output end of the timing belt, and the other end of the timing belt ground resistor is connected with the ground zero potential. By arranging the metal covering layer, the bicycle body is prevented from being in direct contact with the timing belt, and the problems that equipment is damaged and signal transmission is affected due to electrostatic discharge of the bicycle body are solved.

Description

Technical Field

[0001] The utility model relates to the field of sports training systems, in particular to a pressure timer and a track bicycle segment timing system. Background Art

[0002] Track cycling is a cycling sport conducted on dedicated tracks. It includes pursuit races, time trials, points races, and sprints. Daily track cycling training requires statistical analysis of athletes' performance. With the advancement of technology, segmented timing systems have been widely adopted in track cycling training, significantly reducing the workload of coaches and improving the accuracy of performance statistics.

[0003] The utility model patent with authorization announcement number CN 108771855 B discloses a segmented timing and speed measurement system and method for track cycling, which uses a wireless piezoelectric module to collect bicycle rolling signals. This improves the accuracy of performance statistics. However, during the operation of the bicycle, the friction between the rubber tires and the floor, the friction between the bicycle body and the air, and the friction between the athlete and the bicycle body will generate static electricity. Especially in a dry environment, the charge continues to accumulate and the voltage continues to rise. When the static electricity voltage is high enough to break through the air at the edge of the tire, the bicycle will discharge to the outside. The instantaneous release of high voltage can damage the pressure detection terminal equipment, and this discharge can interfere with the pressure collection circuit and wireless transmission equipment. At the same time, the discharge can also interfere with the wireless signal receiving device gateway, resulting in abnormal or lost transmission data. Utility Model Content

[0004] The purpose of this utility model is to provide a pressure timer and a track cycling segment timing system, which are used to solve the technical problem that static discharge from the bicycle body damages the pressure detection terminal equipment and interferes with the transmission signal of the timing system in the existing track cycling segment timing system.

[0005] A pressure timer comprises a timing belt and a timing collection terminal, wherein the timing belt is connected to the timing collection terminal;

[0006] The timing belt is attached to a bicycle training ground. A metal covering layer is attached to the upper end surface of the timing belt. The metal covering layer is connected to the zero potential of the earth through a grounding wire. One end of the timing belt's resistance to ground is connected to the output end of the timing belt, and the other end of the timing belt's resistance to ground is connected to the zero potential of the earth.

[0007] Optionally, the timing acquisition terminal includes a common mode and differential mode suppression circuit module, a comparator circuit module and an optical module connected in sequence;

[0008] It also includes a DC / DC isolated power supply module for voltage conversion, and the power supply output end of the DC / DC isolated power supply module is connected to the electrical input end of the comparator circuit module.

[0009] Optionally, the common-mode and differential-mode suppression circuit module includes a connector P7, a transient protection diode D1, a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a current-limiting resistor R8, a common-mode capacitor C1, a common-mode capacitor C4, a differential-mode capacitor C2, a differential-mode capacitor C3, and a transmission transformer T1;

[0010] The two ends of the transient protection diode D1 are respectively connected to the two input ends of the connector P7 and then to one end of the current limiting resistor R1 and the current limiting resistor R3 respectively. The two ends of the common-mode capacitor C1 and the common-mode capacitor C4 are connected in series and are respectively connected to the other ends of the current limiting resistor R1 and the current limiting resistor R3. The two ends of the differential-mode capacitor C3 are respectively connected to the other ends of the current limiting resistor R1 and the current limiting resistor R3 and then to the two input ends of the transmission transformer T1.

[0011] One end of the current limiting resistor R8 and the differential mode capacitor C2 connected in parallel is respectively connected to an output end of the transmission transformer T1 and one end of the current limiting resistor R2, and the other end of the current limiting resistor R8 and the differential mode capacitor C2 connected in parallel is respectively connected to the other output end of the transmission transformer T1 and one end of the current limiting resistor R4. The other end of the current limiting resistor R2 is the output end of the common mode and differential mode suppression circuit module, and the current limiting resistor R4 is connected to the ground end GND1.

[0012] Optionally, the DC / DC isolated power supply module includes a capacitor C9, a capacitor C11, a capacitor C16, a capacitor C17, a resistor R18, a diode D3, a connector P4 and a power module VR1;

[0013] Capacitors C9, C11, C16, and C17 are connected in parallel to form a loop with the power module VR1. Resistor R18 and diode D3 are connected in series to form a loop with the power module VR1. A first conversion power output terminal is also provided at one end of the parallel connection of capacitors C9, C11, C16, and C17.

[0014] Optionally, the DC / DC isolated power supply module further includes a capacitor C5, a capacitor C6, a capacitor C7 and a capacitor C8;

[0015] One end of the capacitor C7 and the capacitor C8 connected in parallel is connected to the power module VR1 and a pin of the connector P4 respectively, and the capacitor C7 and the capacitor C8 are further provided with a second conversion power output end;

[0016] One end of the capacitor C5 is connected to a pin of the connector P4 and then connected to the other end of the capacitor C7 and the capacitor C8 in parallel. The other end of the capacitor C5 is connected to a pin of the connector P4 and then connected to one end of the capacitor C6. The other end of the capacitor C6 is connected to a pin of the connector P4 and is provided with a third conversion power supply output end.

[0017] Optionally, the comparator circuit module includes a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R13, a capacitor C10, a diode D2, a comparator U1B and an optocoupler U2;

[0018] The resistor R7 is connected to the input end of the comparator circuit module and then connected to the positive input end of the comparator U1B and one end of the resistor R9. The other end of the resistor R7 is connected to one end of the resistor R10, one end of the capacitor C10, and one end of the resistor R6. The other end of the resistor R6 is connected to an input end of the optocoupler U2. The other end of the capacitor C10 is connected to the ground end GND1. The other end of the resistor R10 is connected to one end of the resistor R13 and the negative input end of the comparator U1B. The other end of the resistor R13 is connected to the ground end GND1.

[0019] The output end of the comparator U1B is connected to the other end of the resistor R9 and the cathode of the diode D2. The anode of the diode D2 is connected to the other input end of the optocoupler U2. The comparator circuit module is also provided with a first power input end.

[0020] Optionally, the comparator circuit module further includes a resistor R5, a resistor R14 and a resistor R19;

[0021] One end of the resistor R5 is connected to an output end of the optocoupler U2, the other end of the resistor R5 is connected to one end of the resistor R19 and the ground terminal GND, and the other end of the resistor R19 is connected to the ground terminal GND0;

[0022] One end of the resistor R14 is connected to the output end of the comparator circuit module and the other output end of the optocoupler U2 , and the other end of the resistor R14 is connected to the second power input end.

[0023] Optionally, the optical module includes a resistor R15, a resistor R16 and a connector P2;

[0024] A third power input terminal is provided on the optical module, and the two pins of the connector P2, one end of the resistor R15, and one end of the resistor R16 are all connected to the third power input terminal, the other end of the resistor R15 is connected to a pin of the connector P2, the other end of the resistor R16 is connected to a pin of the connector P2 and the input terminal of the optical module, and the two pins of the connector P2 are both connected to the ground terminal GND.

[0025] A track cycling segment timing system, comprising the above-mentioned pressure timers and a timing control terminal, wherein the pressure timers are in N groups, and all the N groups of pressure timers are in data communication with the timing control terminal;

[0026] The N groups of pressure timers are respectively arranged at different positions of the bicycle training track, and the N groups of pressure timers are used to measure pressure data and time data when a bicycle passes by.

[0027] Optionally, it also includes a countdown display screen and a performance data display and analysis screen set up in the bicycle training ground;

[0028] The countdown display screen and the performance data display and analysis screen are both in data communication with the timing control terminal, and the countdown display screen is also loaded with a sound prompt module.

[0029] Due to the adoption of the above technical solution, the utility model has the following advantages:

[0030] 1. This application prevents the bicycle body from directly contacting the timing belt by providing a metal covering layer, and discharges the static electricity of the bicycle body by grounding the metal covering layer, thereby reducing the problem of damage to equipment and influence on signal transmission due to static electricity discharge from the bicycle body.

[0031] 2. This application incorporates common-mode and differential-mode suppression circuit modules. When signal transmission is disturbed by external electromagnetic fields, the voltage induced in the timing belt connecting wire generates common-mode interference current. Common-mode capacitors C1 and C4 act to suppress this interference current from entering the subsequent voltage comparison circuit module. When the pressure timer connecting wire is disturbed by external electromagnetic fields, generating differential-mode interference between the wires, the interference signal is bypassed by differential-mode capacitors C2 and C3, reducing the impact of external electromagnetic fields on signal transmission.

[0032] 3. This application provides power to multiple modules separately by setting up DC / DC isolation power supply modules. When a high-voltage breakdown fault occurs at the front end of the circuit module, it will not affect the subsequent circuits.

[0033] 4. This application improves the accuracy of training timing by setting up several pressure timers to count the time spent in each section of the bicycle. The statistics of the time spent in each section facilitate the analysis and summary of the athletes' performance.

[0034] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings of the present invention are described as follows.

[0036] Figure 1 This is a structural diagram of the pressure timer module of the utility model.

[0037] Figure 2 This is a circuit diagram of the common-mode and differential-mode suppression circuit module of the utility model.

[0038] Figure 3 This is a circuit diagram of the comparator circuit module, optical module and DC / DC isolated power supply module of the utility model.

[0039] Figure 4 The figure is a schematic structural diagram of the track cycling segment timing system of the present invention.

[0040] In the figure: 1-timing belt; 2-timing collection terminal; 3-metal covering layer; 4-timing belt-to-ground resistance; 5-timing control terminal; 6-countdown display screen; 7-performance data display and analysis screen; 8-bicycle body; 9-ground. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] Example 1:

[0043] like Figure 1 The pressure timer shown includes a timing belt 1 and a timing collection terminal 2; the timing belt 1 is connected to the timing collection terminal 2;

[0044] The timing belt 1 is attached to the bicycle training ground. The upper end surface of the timing belt 1 is attached with a metal covering layer 3. The metal covering layer 3 is connected to the zero potential of the earth through a grounding wire. One end of the timing belt ground resistor 4 is connected to the output end of the timing belt 1, and the other end of the timing belt ground resistor 4 is connected to the zero potential of the earth.

[0045] In this embodiment, if Figure 1As shown, since the tires on bicycle body 8 are made of rubber, static electricity is generated by friction between the rubber and the ground 9 during movement, as well as between the bicycle body 8 and the air, and between the athlete and the bicycle body 8. The dielectric constant of rubber can make the connection between bicycle body 8 and the ground 9 equivalent to a capacitor. This capacitor continuously accumulates charge. When the bicycle passes over the timing belt, in the absence of metal coating 3, the metal hub of bicycle body 8 discharges the charge through the ground resistance 4 loop of the timing belt 1's signal line. When the timing belt 1 is covered with a dense metal coating 3, when the bicycle body 8 discharges, the discharge current no longer flows through the timing belt 1's signal line to reach the protection timing belt 1 and the detection terminal connected to it, thereby preventing the generation of false trigger signals.

[0046] like Figure 2 and Figure 3 As shown, the timing acquisition terminal 2 includes a common mode and differential mode suppression circuit module, a comparator circuit module and an optical module connected in sequence;

[0047] It also includes a DC / DC isolated power supply module for voltage conversion, and the power supply output end of the DC / DC isolated power supply module is connected to the electrical input end of the comparator circuit module.

[0048] like Figure 2 As shown, the common-mode and differential-mode suppression circuit module includes a connector P7, a transient protection diode D1, a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a current-limiting resistor R8, a common-mode capacitor C1, a common-mode capacitor C4, a differential-mode capacitor C2, a differential-mode capacitor C3, and a transmission transformer T1;

[0049] The two ends of the transient protection diode D1 are respectively connected to the two input ends of the connector P7 and then to one end of the current limiting resistor R1 and the current limiting resistor R3 respectively. The two ends of the common-mode capacitor C1 and the common-mode capacitor C4 are connected in series and are respectively connected to the other ends of the current limiting resistor R1 and the current limiting resistor R3. The two ends of the differential-mode capacitor C3 are respectively connected to the other ends of the current limiting resistor R1 and the current limiting resistor R3 and then to the two input ends of the transmission transformer T1.

[0050] One end of the current limiting resistor R8 and the differential mode capacitor C2 connected in parallel is respectively connected to an output end of the transmission transformer T1 and one end of the current limiting resistor R2, and the other end of the current limiting resistor R8 and the differential mode capacitor C2 connected in parallel is respectively connected to the other output end of the transmission transformer T1 and one end of the current limiting resistor R4. The other end of the current limiting resistor R2 is the output end of the common mode and differential mode suppression circuit module, and the current limiting resistor R4 is connected to the ground end GND1.

[0051] In this embodiment, if Figure 2As shown, GND0 is grounded. The transmission lines of Timing Strip 1 are connected to pins 2 and 3 of connector P7, respectively. When a transient high voltage is applied to Timing Strip 1, it is discharged through the transient diode circuit. Current limiting by resistors R1 and R2 protects the subsequent circuits from the high voltage. When signal transmission is disturbed by external electromagnetic fields, the voltage induced in Timing Strip 1's connecting lines generates common-mode interference current. Common-mode capacitors C1 and C4 prevent this interference current from entering the subsequent voltage comparison circuit module. When differential-mode interference is generated between the lines of Timing Strip 1 due to external electromagnetic fields, the interference signal is bypassed by differential-mode capacitors C2 and C3, reducing the impact of the external electromagnetic field on signal transmission. Figure 2 S0 is the output end of the common mode and differential mode suppression circuit module.

[0052] like Figure 3 As shown, the DC / DC isolated power supply module includes capacitor C9, capacitor C11, capacitor C16, capacitor C17, resistor R18, diode D3, connector P4 and power module VR1;

[0053] Capacitors C9, C11, C16, and C17 are connected in parallel to form a loop with the power module VR1. Resistor R18 and diode D3 are connected in series to form a loop with the power module VR1. A first conversion power output terminal is also provided at one end of the parallel connection of capacitors C9, C11, C16, and C17.

[0054] like Figure 3 As shown, the DC / DC isolated power supply module further includes capacitor C5, capacitor C6, capacitor C7 and capacitor C8;

[0055] One end of the capacitor C7 and the capacitor C8 connected in parallel is connected to the power module VR1 and a pin of the connector P4 respectively, and the capacitor C7 and the capacitor C8 are further provided with a second conversion power output end;

[0056] One end of the capacitor C5 is connected to a pin of the connector P4 and then connected to the other end of the capacitor C7 and the capacitor C8 in parallel. The other end of the capacitor C5 is connected to a pin of the connector P4 and then connected to one end of the capacitor C6. The other end of the capacitor C6 is connected to a pin of the connector P4 and is provided with a third conversion power supply output end.

[0057] In this embodiment, if Figure 3 As shown, the first conversion power output terminal outputs VCC3V3, the second conversion power output terminal outputs VCC5V1, and the third conversion power output terminal outputs VCC5V0. The input power is converted by the DC / DC isolation power module to power the comparison circuit module and the optical module respectively.

[0058] like Figure 3 As shown, the comparator circuit module includes a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R13, a capacitor C10, a diode D2, a comparator U1B and an optocoupler U2;

[0059] The resistor R7 is connected to the input end of the comparator circuit module and then connected to the positive input end of the comparator U1B and one end of the resistor R9. The other end of the resistor R7 is connected to one end of the resistor R10, one end of the capacitor C10, and one end of the resistor R6. The other end of the resistor R6 is connected to an input end of the optocoupler U2. The other end of the capacitor C10 is connected to the ground end GND1. The other end of the resistor R10 is connected to one end of the resistor R13 and the negative input end of the comparator U1B. The other end of the resistor R13 is connected to the ground end GND1.

[0060] The output end of the comparator U1B is connected to the other end of the resistor R9 and the cathode of the diode D2. The anode of the diode D2 is connected to the other input end of the optocoupler U2. The comparator circuit module is also provided with a first power input end.

[0061] like Figure 3 As shown, the comparator circuit module further includes a resistor R5, a resistor R14 and a resistor R19;

[0062] One end of the resistor R5 is connected to an output end of the optocoupler U2, the other end of the resistor R5 is connected to one end of the resistor R19 and the ground terminal GND, and the other end of the resistor R19 is connected to the ground terminal GND0;

[0063] One end of the resistor R14 is connected to the output end of the comparator circuit module and the other output end of the optocoupler U2 , and the other end of the resistor R14 is connected to the second power input end.

[0064] like Figure 3 As shown, the optical module includes a resistor R15, a resistor R16 and a connector P2;

[0065] A third power input terminal is provided on the optical module, and the two pins of the connector P2, one end of the resistor R15, and one end of the resistor R16 are all connected to the third power input terminal, the other end of the resistor R15 is connected to a pin of the connector P2, the other end of the resistor R16 is connected to a pin of the connector P2 and the input terminal of the optical module, and the two pins of the connector P2 are both connected to the ground terminal GND.

[0066] In this embodiment, if Figure 3As shown, the first power input terminal inputs VCC5V0, the first power input terminal is connected to the third power output terminal, the second power input terminal inputs VCC3V3, the second power input terminal is connected to the first power output terminal. When the pressure timer 1 is pressurized, the resistance value will decrease, and after passing through the common mode and differential mode suppression circuit modules, it reaches the comparison circuit module. Figure 3 S0 is the input of the comparator circuit module, connected to the output of the common-mode and differential-mode suppression circuit module, S0. The voltage divided by resistors R10 and R13 serves as the reference voltage for comparator U1B. When the positive input voltage of comparator U1B drops below the negative input voltage after the pressure timer is pressurized, the output of comparator U1B outputs a low level. Power supply VCC5V0, limited by resistor R6, flows through optocoupler U2, diode D2, and GND1, forming a loop. The optocoupler output S1 outputs a low level, driving the optical module, which shuts off its light output. The pressure timer detection circuit operates independently through power supply isolation P4 and optocoupler isolation U2. A high-voltage breakdown fault will not affect subsequent circuits.

[0067] Example 2:

[0068] like Figure 4 A track cycling segment timing system is shown, comprising the pressure timer described in Example 1 and a timing control terminal 5, wherein the pressure timers are in N groups, and all the N groups of pressure timers are in data communication with the timing control terminal 5;

[0069] The N groups of pressure timers are respectively arranged at different positions of the bicycle training track, and the N groups of pressure timers are used to measure pressure data and time data when a bicycle passes by.

[0070] like Figure 4 As shown, it also includes a countdown display screen 6 and a performance data display and analysis screen 7 set in the bicycle training ground;

[0071] The countdown display screen 6 and the performance data display and analysis screen 7 are in data communication with the timing control terminal 5 , and the countdown display screen 6 is also equipped with a sound prompt module.

[0072] In this embodiment, the timing control terminal 5 communicates with the timing collection terminal 2 via optical fiber, and the countdown display screen 6 and the performance data display and analysis screen 7 communicate with the timing control terminal 5 via an RS485 serial communication module. When the countdown reaches 5 seconds, the sound prompt module begins to emit a continuous sound prompt.

[0073] In this embodiment, before the start of training, N groups of pressure timers are placed at different positions on the circular training track at a certain interval and are assigned different numbers. The distance data from each group of N pressure timers to the starting position is stored in the timing control terminal 5. When the bicycle passes by the pressure timer, the pressure timer detects the pressure and transmits the time data at this time back to the timing control terminal 5. The timing control terminal 5 processes the time data and distance data and transmits them to the performance data display and analysis screen 7 for display.

[0074] In this embodiment, the timing control terminal 5 can interface with the Tiansuo command system, enabling training timing via Tiansuo commands. The timing control terminal 5 has both wired and wireless communication capabilities, supporting seven simultaneous pressure timers. The timing control terminal 5 has a communication range of 10 to 500 meters, a DC 12V input voltage, and a single-mode, single-core FC fiber optic connector.

[0075] The timing belt 1 utilizes a flexible nanostructured pressure timer strip with a response time of less than 10 μs. Available in various lengths ranging from 3 to 8 meters, it can be selected based on the width of the training track. It is placed horizontally across the training track. As a bicycle passes by, the timing belt 1 collects pressure signals. The timing acquisition terminal 2 converts these signals and transmits them via high-speed optical fiber to the timing control terminal 5. The timing acquisition terminal 2 utilizes a single-mode, single-core FC fiber optic connector, operates on a DC 12V input voltage, and maintains an accuracy of less than 1 millisecond.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A pressure timer, characterized in that: It comprises a timing belt (1) and a timing collection terminal (2), wherein the timing belt (1) is connected to the timing collection terminal (2); The timing belt (1) is attached to a bicycle training ground, a metal covering layer (3) is attached to the upper end surface of the timing belt (1), the metal covering layer (3) is connected to the zero potential of the earth through a grounding wire, one end of the timing belt ground resistor (4) is connected to the output end of the timing belt (1), and the other end of the timing belt ground resistor (4) is connected to the zero potential of the earth.

2. A pressure timer according to claim 1, characterized in that: The timing acquisition terminal (2) comprises a common mode and differential mode suppression circuit module, a comparator circuit module and an optical module which are connected in sequence; It also includes a DC / DC isolated power supply module for voltage conversion, and the power supply output end of the DC / DC isolated power supply module is connected to the electrical input end of the comparator circuit module.

3. A pressure timer according to claim 2, characterized in that: The common-mode and differential-mode suppression circuit module includes a connector P7, a transient protection diode D1, a current-limiting resistor R1, a current-limiting resistor R2, a current-limiting resistor R3, a current-limiting resistor R4, a current-limiting resistor R8, a common-mode capacitor C1, a common-mode capacitor C4, a differential-mode capacitor C2, a differential-mode capacitor C3, and a transmission transformer T1; The two ends of the transient protection diode D1 are respectively connected to the two input ends of the connector P7 and then to one end of the current limiting resistor R1 and the current limiting resistor R3 respectively. The two ends of the common-mode capacitor C1 and the common-mode capacitor C4 are connected in series and are respectively connected to the other ends of the current limiting resistor R1 and the current limiting resistor R3. The two ends of the differential-mode capacitor C3 are respectively connected to the other ends of the current limiting resistor R1 and the current limiting resistor R3 and then to the two input ends of the transmission transformer T1. One end of the current limiting resistor R8 and the differential mode capacitor C2 connected in parallel is respectively connected to an output end of the transmission transformer T1 and one end of the current limiting resistor R2, and the other end of the current limiting resistor R8 and the differential mode capacitor C2 connected in parallel is respectively connected to the other output end of the transmission transformer T1 and one end of the current limiting resistor R4. The other end of the current limiting resistor R2 is the output end of the common mode and differential mode suppression circuit module, and the current limiting resistor R4 is connected to the ground end GND1.

4. A pressure timer according to claim 2, characterized in that: The DC / DC isolated power supply module includes capacitor C9, capacitor C11, capacitor C16, capacitor C17, resistor R18, diode D3, connector P4 and power module VR1; Capacitors C9, C11, C16, and C17 are connected in parallel to form a loop with the power module VR1. Resistor R18 and diode D3 are connected in series to form a loop with the power module VR1. A first conversion power output terminal is also provided at one end of the parallel connection of capacitors C9, C11, C16, and C17.

5. A pressure timer according to claim 4, characterized in that: The DC / DC isolated power supply module further includes capacitor C5, capacitor C6, capacitor C7 and capacitor C8; One end of the capacitor C7 and the capacitor C8 connected in parallel is connected to the power module VR1 and a pin of the connector P4 respectively, and the capacitor C7 and the capacitor C8 are further provided with a second conversion power output end; One end of the capacitor C5 is connected to a pin of the connector P4 and then connected to the other end of the capacitor C7 and the capacitor C8 in parallel. The other end of the capacitor C5 is connected to a pin of the connector P4 and then connected to one end of the capacitor C6. The other end of the capacitor C6 is connected to a pin of the connector P4 and is provided with a third conversion power supply output end.

6. A pressure timer according to claim 2, characterized in that: The comparator circuit module includes a resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R13, a capacitor C10, a diode D2, a comparator U1B and an optocoupler U2; The resistor R7 is connected to the input end of the comparator circuit module and then connected to the positive input end of the comparator U1B and one end of the resistor R9. The other end of the resistor R7 is connected to one end of the resistor R10, one end of the capacitor C10, and one end of the resistor R6. The other end of the resistor R6 is connected to an input end of the optocoupler U2. The other end of the capacitor C10 is connected to the ground end GND1. The other end of the resistor R10 is connected to one end of the resistor R13 and the negative input end of the comparator U1B. The other end of the resistor R13 is connected to the ground end GND1. The output end of the comparator U1B is connected to the other end of the resistor R9 and the cathode of the diode D2. The anode of the diode D2 is connected to the other input end of the optocoupler U2. The comparator circuit module is also provided with a first power input end.

7. A pressure timer according to claim 6, characterized in that: The comparator circuit module further includes a resistor R5, a resistor R14 and a resistor R19; One end of the resistor R5 is connected to an output end of the optocoupler U2, the other end of the resistor R5 is connected to one end of the resistor R19 and the ground terminal GND, and the other end of the resistor R19 is connected to the ground terminal GND0; One end of the resistor R14 is connected to the output end of the comparator circuit module and the other output end of the optocoupler U2 , and the other end of the resistor R14 is connected to the second power input end.

8. A pressure timer according to claim 2, characterized in that: The optical module includes a resistor R15, a resistor R16 and a connector P2; A third power input terminal is provided on the optical module, and the two pins of the connector P2, one end of the resistor R15, and one end of the resistor R16 are all connected to the third power input terminal, the other end of the resistor R15 is connected to a pin of the connector P2, the other end of the resistor R16 is connected to a pin of the connector P2 and the input terminal of the optical module, and the two pins of the connector P2 are both connected to the ground terminal GND.

9. A track cycling segment timing system, characterized in that: The device comprises a pressure timer according to any one of claims 1 to 8, and a timing control terminal (5), wherein the number of the pressure timers is N groups, and the N groups of pressure timers are all in data communication with the timing control terminal (5); The N groups of pressure timers are respectively arranged at different positions of the bicycle training track, and the N groups of pressure timers are used to measure pressure data and time data when a bicycle passes by.

10. A track cycling segment timing system according to claim 9, characterized in that: The device also includes a countdown display screen (6) and a performance data display and analysis screen (7) arranged at a bicycle training ground; The countdown display screen (6) and the performance data display and analysis screen (7) are both in data communication with the timing control terminal (5), and the countdown display screen (6) is also loaded with a sound prompt module.

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