I. Core Definition of the Handheld Mobile Transport Clock

The handheld mobile handling clock is equipped with Portable, standalone time synchronization, high Accurate Punctuality A mobile time‑reference device with integrated BeiDou. / GPS Satellite timing module, high-precision atomic clock (or temperature-compensated crystal oscillator), and battery-powered system, enabling standalone operation in the absence of grid power or network connectivity, providing support for outdoor equipment, emergency scenarios, and mobile terminals. Accurate Time synchronization services address the mobile and emergency timing needs that fixed-time servers cannot meet.

II. Core Technical Architecture of the Handheld Mobile Handling Clock

(1) Hardware System Design

• Time-keeping and Time-keeping Unit : Built-in single BeiDou / Beidou + GPS Dual-mode timing module, supporting rapid satellite signal acquisition (cold start). ≤30 seconds), with timing accuracy reaching 10ns ; Built-in high-precision rubidium atomic clock (or high-end temperature-compensated crystal oscillator), with timing accuracy reaching after satellite signal loss 0.1 μs/h (rubidium clock), 1 μs/h ( OCXO ), capable of continuous timekeeping 72 More than an hour.
• Power supply system : Large-capacity lithium - ion Battery (capacity ≥10000mAh ), supports fast charging ( 2 Full charge in hours, slow charging, and battery life ≥12 Hours (continuous operation), standby time ≥7 Daytime; supports solar charging (optional), suitable for outdoor scenarios without access to mains power.
• Human-Computer Interaction Unit : High Definition LCD Touch screen ( ≥3.5 inches), displays time information (hours / point / seconds / year / month / day / Day of the week, satellite signal quality, battery level, and timekeeping status; supports physical button operation and is compatible with glove use and deployment in harsh environments.
• Communication and Interface Unit : Equipped with USB-C 、RS485、 Ethernet Interface, supports wired synchronization with terminal devices; supports WiFi , Bluetooth wireless communication for short-range wireless time synchronization; supports PPS 、 B It outputs a coded signal, providing a time reference for professional equipment.
• Structural Design : Lightweight (weight ≤2kg ), drop-proof and waterproof ( IP65 Level), wide-temperature adaptation ( -20℃~60℃ ), suitable for complex scenarios such as outdoor activities, field operations, and emergency rescue.

(II) Core Workflows

1. Baseline Time Calibration : Automatically searches for Beidou upon device startup. / GPS Satellite signals: after acquiring the signal, rapidly calibrate the internal atomic clock. / Crystal oscillator, obtaining the standard UTC Time, complete the initial time synchronization.
2. Independent and punctual operation : When satellite signals are strong, the system continuously receives signal updates in real time to maintain high accuracy; when indoors, underground, in obstructed areas, or during satellite signal interruptions, it switches to an internal timing‑keeping mode, relying on an atomic clock. / The crystal oscillator maintains timing accuracy.
3. Time service output : Through the wired interface ( USB/RS485/Ethernet ) or wireless communication ( WiFi / Bluetooth), transmitting to nearby terminal devices NTP/PTP Synchronization signal; via PPS/B The code interface provides a high-precision time reference for industrial equipment and scientific instruments.
4. Condition Monitoring and Alarms : Monitors satellite signal quality, battery level, and timing accuracy in real time; when anomalies are detected, it alerts the user via on-screen prompts and audible/visual alarms, ensuring reliable time synchronization.

III. Core Features of the Handheld Mobile Transport Clock

• Highly portable and mobile : Lightweight design, battery-powered, no fixed installation required; can be carried handheld, worn on the shoulder, or mounted in a vehicle, making it ideal for outdoor and mobile applications.
• All-scenario time synchronization capability : Supports satellite time synchronization, independent timekeeping, and wired connectivity. / Wireless time synchronization enables standalone operation in the absence of power grids or network connectivity, covering scenarios that fixed-time‑synchronization devices cannot reach.
• High-precision long-term timekeeping : Built-in rubidium atomic clock / High-end OCXO , with high timing accuracy and long endurance, meeting the requirements for prolonged operation in emergency scenarios. Accurate Time synchronization requirements.
• Domestic, independent, and controllable : Single‑Beidou timing module, domestically produced core chip, and independently developed synchronization algorithm, 100% Domestic localization to meet the requirements of information technology innovation and classified‑information scenarios.
• Strong environmental adaptability : Drop‑proof and waterproof, operates over a wide temperature range, and resists electromagnetic interference; suitable for harsh environments such as outdoor operations, emergency rescue, and mining and oilfield applications.
• Simple and intuitive operation : Touchscreen + Dual physical-button operation, a clean and intuitive interface, and no specialized technical expertise required—making it easy for non‑technical users to get started quickly.

IV. Main Application Scenarios of Handheld Mobile Handling Clocks

(1) Emergency Rescue Scenarios

When natural disasters such as earthquakes, floods, and typhoons cause disruptions to the power grid and communication networks, they provide power to rescue command equipment, communication terminals, and sensors. Accurate Time synchronization ensures consistent sequencing of rescue commands and traceable data recording.

(II) Outdoor Equipment Commissioning and Calibration

During the installation and commissioning of outdoor equipment such as base stations, substations, and rail transit signaling systems, a temporary time reference is used to calibrate the devices’ time‑synchronization functionality, thereby avoiding the inefficiencies associated with relying on fixed time servers.

(3) Research and Fieldwork

Field research projects such as geological exploration, environmental monitoring, and astronomical observation provide for portable scientific instruments and data acquisition equipment. Accurate Time synchronization ensures the temporal accuracy of scientific data and the reliability of results.

(4) Military Industry and Classified-Security Scenarios

For military field training and mobile operations involving classified equipment, a domestically developed BeiDou‑only design ensures secure and controllable time synchronization, mitigating the risk of reliance on foreign satellite systems and meeting the stringent security requirements of classified environments.

(5) Provision of Support for Temporary Events and Competitions

Large-scale outdoor events, sporting competitions, and temporary conferences provide for the deployment of temporary surveillance equipment, communication systems, and timing devices. Accurate Time synchronization ensures the orderly execution of activities.

V. China–Singapore Innovation DNHH-9 Core Advantages of the Series of Handheld Mobile Handling Clocks

Beijing Zhongxinchuang Technology Co., Ltd. DNHH-9 Series of handheld mobile handling clocks (including DNHH-9 、DNHH-9-R、DNHH-9-GB、DNHH-9-B ) is a benchmark product in China’s mobile time‑synchronization field, with the following core advantages:

1. Full-range configuration coverage : Provides the Basic Edition ( OCXO Timekeeping, high‑end version (rubidium atomic clock timekeeping), single‑Beidou version, and dual‑mode version, catering to varying precision requirements and application scenarios.
2. Timekeeping accuracy : Timing accuracy of the rubidium atomic clock version 0.1 μs/h , satellite outages can maintain continuous timekeeping 72 hour; OCXO Version timekeeping accuracy 1 μs/h , battery life ≥15 Hour.
3. All-scenario time synchronization output : Support USB/RS485/Ethernet Wired time synchronization, WiFi / Bluetooth wireless time synchronization, PPS/B Code signal output, compatible with various terminal devices.
4. Domestic Security Design : Single-BDS version 100% Domestic localization, validated through single‑Beidou terminal testing and classified‑information certification, meets the requirements of information technology innovation and classified‑information scenarios.
5. Industrial-grade protection performance ： IP65 Waterproof and drop-proof, -20℃~60℃ Wide temperature range, electromagnetic interference resistance, and compliance with military-grade reliability tests make it suitable for harsh environments.
6. Human-centered design : Lightweighting ( ≤1.8kg ), large-capacity battery, optional solar charging, touchscreen + Physical buttons ensure convenient operation and deliver an excellent outdoor experience.