FSR Sample Approval: Validate Force Mapping Before Freezing the Actuator

Approve an FSR sample with the actual actuator, support, preload, readout circuit and command mapping identified. If the mounted control reacts slowly or inconsistently, record the applied-force event, sensor readout and host command on an agreed time reference. That record helps the buyer and suppliers locate the change before replacing the sensing film or adjusting a threshold. A resistance curve alone cannot show where delay occurs between the applied force and the host command.

Control-loop rate and the sample timing record

In its robotics announcement published on 2026-10-21, NVIDIA describes WUJI Hand 2 hands with 1 kHz force control and tactile sensing on the Agile ONE SN reference humanoid. The reference platform was scheduled for availability in early 2027. The announcement does not identify a Baoshengda FSR or establish a response time for a custom sensing film.

For an equipment buyer, a control-loop rate leaves several sample-approval questions open. It does not tell the buyer when the applied force changed, when the readout registered that change, or when the host issued a command. Treat those events separately when reviewing an installed FSR. The checks below are a proposed sample-review method, not a test result from that robot platform or a claim that its hands use FSR technology.

Freeze the actuator before comparing sensor samples

The actuator is part of the sensing system. Record its diameter, edge radius, hardness, surface finish and alignment to the active area. A small hard tip concentrates the applied load; a compliant pad distributes it differently. Use the contact geometry that represents the installed mechanism when comparing samples.

Preload also matters. A foam layer, spring, cover film or enclosure rib can load the sensor before the user touches the control. Record that starting condition and the support surface. An unmounted film under a laboratory weight does not reproduce every feature of the intended assembly.

Use the FSR pressure sensor engineering route to review the active area, tail direction and actuator drawing. Keep the fixture and sample revision with the electrical record so a later mechanical change is visible.

Align the force reference, readout and command

Agree what starts and ends the timing measurement before collecting data. If a separate force reference is used, identify its location, range and time base. A handwritten note that the actuator was pressed cannot establish a precise start time. Logs from separate clocks need a documented alignment method before their timestamps can be subtracted.

Here, raw readout means the recorded circuit or ADC output before the chosen software filter. It is not automatically a force measurement in newtons. Any conversion to force needs the buyer's agreed calibration and installed mechanical conditions. Likewise, the acquisition interval and controller-loop rate do not by themselves establish the sensor's response time.

Use the traces to decide what to investigate

If the force reference changes after the intended input event, check how that event was marked and how the load reaches the sensing area. Establish that relationship before interpreting a delay in the raw readout or attributing it to the FSR. If the raw readout changes before the filtered output, review the acquisition and filter settings while retaining the same mechanical sample. If the filtered signal changes before the command state, review the mapping, debounce and host processing.

Use these comparisons to choose the next check. They do not establish a single cause. Electrical loading, saturation, clipping, missing samples and clock alignment can also affect the record. Keep the original trace before changing settings, identify the changed parameter, then repeat the agreed input sequence. Changing the actuator, circuit and filter together makes the comparison harder to interpret.

Run the record in the mounted control sequence

Start after the sensor has been assembled into the intended fixture. Apply the buyer's defined minimum, normal and maximum inputs through the real actuator. Include the intended hold and release sequence, permitted off-center input and nearby inactive regions. Agree acceptable command behavior and timing with the equipment designer before calling the sample approved; this article supplies no universal force or latency limit.

For a position-sensitive command, retain the input location as well as force. For a single command, check whether an edge input or mechanical tolerance can create an unintended command. Retest after the intended tail bending and connector mating or soldering, because the final installation can load the sensing area differently. Keep the fixture, termination and firmware revisions with both records.

An earlier reference is Combining force and kinematic signals for human-computer interface: insights from cursor control by flexible pressure sensors, published on 22 August 2026. It remains background reading here. Its publication does not establish a response-time limit for a custom FSR in another installed control.

Begin the inquiry, then define sample approval

You can start an FSR sample-review inquiry with an available photograph or drawing, the intended use, approximate quantity and the problem you are trying to resolve. Existing traces help if you have them; a complete measurement package is not required for the first contact.

For the later sample-approval plan, agree the active-area datum, actuator and preload, mounted support, circuit, force-reference method, acquisition settings and command mapping. Name who owns each item. Retain raw and filtered records, command states and the agreed acceptance decision against the sample revision. Mark unavailable evidence as unresolved rather than assigning a response-time value from another product.

Baoshengda can review the sensing pattern, active area, stack concept, tail geometry, termination and physical sample evidence for an agreed FSR design. The equipment designer owns the actuator, host electronics, calibration, firmware mapping, command safety and final equipment validation. The photograph shows a flexible sensing part. Its visible pad areas do not establish the number of independent channels or prove a mounted timing test.